JP5932530B2 - Motorcycle - Google Patents

Description

  The present invention relates to a motorcycle that shifts the rotation of an internal combustion engine and transmits it to drive wheels.

  A motorcycle is provided with a fuel injection valve in the intake system of the internal combustion engine. When a predetermined condition is satisfied, the operation of the fuel injection valve is automatically stopped, and ignition control of the internal combustion engine is performed after a predetermined period of time has elapsed since the stop. A configuration for stopping and idle-stopping is disclosed (for example, see Patent Document 1).

Japanese Patent Laid-Open No. 2004-100606

However, since the conventional configuration automatically stops idling, it requires a lot of sensors and requires complicated control, which is difficult to adopt for an inexpensive motorcycle.
On the other hand, in this kind of inexpensive motorcycle, when the signal stops, the driver manually turns the key of the key cylinder to stop idling manually, and when starting, operates the starter switch to manually operate the engine. There was a case of starting.
However, these equipments are operated when the vehicle gets on and off, and it is cumbersome to operate every time the signal is stopped, which is different from the usage mode of the main body. In addition, in an inexpensive motorcycle employing a carburetor and a catalyst provided in the exhaust system of the internal combustion engine, if the engine is stopped by key operation of the key cylinder when the throttle is opened, a sudden stop of fuel supply occurs. In some cases, a complicated countermeasure structure such as fuel cut is required.

Therefore, when considering the provision of a manual switch for idle control, there is a problem that if idle stop and idle permission (engine start) are performed with separate controls, the number of parts increases and the cost increases. It will occur.
The present invention has been made in view of the above-described circumstances, and an object thereof is to provide a motorcycle that can appropriately perform idle stop and idle permission while reducing the number of parts.

In order to solve the above-described problems, the present invention provides a single operating element (12) for a motorcycle having a manual transmission (12B) for shifting the rotation of the internal combustion engine (12A) and transmitting the rotation to the drive wheels (46). 84S), and the operation state of the internal combustion engine (12A) is determined when the single operation element is operated, and if the internal combustion engine (12A) is in operation. An idle stop control unit (101) for stopping the internal combustion engine (12A) and starting the internal combustion engine (12A) if the internal combustion engine (12A) is stopped , the idle stop control unit (101) Detects the rotational speed of the internal combustion engine (12A) when the operating element (84S) is operated, and enters an idling stop mode when a rotational speed exceeding zero is detected. (Ne1) When idling is stopped, the idling stop is permitted. When the engine speed is zero, the engine is restarted. The starter motor (85) for starting the internal combustion engine (12A) is driven, and a predetermined engine speed ( It determines that start completion when a Ne2) or more, and that you automatically stops the starter motor (85). According to this configuration, with the configuration including the manual switch for idle control, it is possible to appropriately perform idle stop and idle permission while reducing the number of parts. Further, it is possible to appropriately select idling stop or restart according to the rotational speed of the internal combustion engine.
The present invention also relates to an idle control having a single operation element (84S) in a motorcycle having a manual transmission (12B) for shifting the rotation of the internal combustion engine (12A) and transmitting the rotation to the drive wheels (46). The operating state of the internal combustion engine (12A) is determined when the switch (84) and the single operator are operated. If the internal combustion engine (12A) is operating, the internal combustion engine (12A) And an idle stop control unit (101) for starting the internal combustion engine (12A) when the internal combustion engine (12A) is stopped, the idle control switch (84) A seesaw switch in which an operating element (84S) swings or a slide switch in which the single operating element (84S) slides, and the idle stop control unit (101) When the operation element (84S) is operated to one side, the internal combustion engine (12A) is stopped if the internal combustion engine (12A) is in operation, and when the operation element (84S) is operated to the other side, the internal combustion engine (12A) is operated. 12A) is stopped, the internal combustion engine (12A) is started, and when the single operating element (84S) is operated to one side or the other side, the position is fixed to the operated side. When the single operator (84S) is operated, the idle stop control unit (101) performs control according to the operated side after a predetermined waiting time has elapsed. Features.
The present invention also relates to an idle control having a single operation element (84S) in a motorcycle having a manual transmission (12B) for shifting the rotation of the internal combustion engine (12A) and transmitting the rotation to the drive wheels (46). The operating state of the internal combustion engine (12A) is determined when the switch (84) and the single operator are operated. If the internal combustion engine (12A) is operating, the internal combustion engine (12A) And an idle stop control unit (101) for starting the internal combustion engine (12A) if the internal combustion engine (12A) is stopped, and an inclination detection means (251) for detecting the inclination state of the motorcycle. The idle stop control unit (101) determines whether or not the vehicle is off-road traveling based on the inclined state. If the vehicle is off-road traveling, the idling stop control unit (101) stops the internal combustion engine (12A). Characterized in that it does not allow.

In the above configuration, the idle control switch (84) is a switch configured to have the same operation when stopping / permitting idle of the internal combustion engine (12A), and the idle stop control unit (101) the determined operating condition of the internal combustion engine (12A) for each of the operation, the stopping of the internal combustion engine (12A) if the internal combustion engine (12A) is in operation, the internal combustion engine (12A) is in the stop If so, the internal combustion engine (12A) may be started. According to this configuration, it is possible to appropriately perform idle stop and idle permission by simpler operation and control.
In the above configuration, the idle stop control unit (101) detects the rotational speed of the internal combustion engine (12A) when the operating element (84S) is operated, and detects the rotational speed exceeding zero. A starter motor (85) that enters an idling stop mode and permits idling stop when the engine speed is lower than or equal to a predetermined rotational speed (Ne1), and when the rotational speed is zero, enters a restart mode and starts the internal combustion engine (12A). And the starter motor (85) may be automatically stopped by determining that the engine has been started when the engine speed reaches a predetermined number of revolutions (Ne2) or more. According to this configuration, it is possible to appropriately select idling stop or restart according to the rotational speed of the internal combustion engine.

In the above configuration, the idle control switch (84) is a seesaw switch in which the single operation element (84S) swings or a slide switch in which the single operation element (84S) slides. The idle stop control unit (101) stops the internal combustion engine (12A) when the single operating element (84S) is operated to one side and the internal combustion engine (12A) is in operation. If the internal combustion engine (12A) is stopped when operated to the other side, the internal combustion engine (12A) may be started. According to this configuration, it is possible to stop idling and permit idling with a simple operation.
In the above configuration, when the single operation element (84S) is operated to one side or the other side, the position is fixed to the operated side. The single operation element (84S) ) May be operated, the idle stop control unit (101) may perform control according to the operated side after a predetermined waiting time has elapsed. According to this configuration, when the internal combustion engine is started, it can be started after the internal combustion engine is completely stopped, it is possible to reduce the burden on the crankshaft of the internal combustion engine, and to reduce the power consumption of the starter motor.

In the above configuration, the single operation element (84S) is operated to one side or the other side only while there is an external operating force, and otherwise returns to the return position, and the idle stop control The unit (101) may drive the starter motor (85) for starting the internal combustion engine (12A) while being operated to the other side. According to this configuration, it is possible to apply the same simple control as when operating a conventional starter switch.
Further, in the above configuration, the carburetor (63) provided in the intake system of the internal combustion engine (12A) and the catalyst (69) provided in the exhaust system of the internal combustion engine (12A) are provided, and the internal combustion engine (12A) When the engine is stopped , the idle stop control unit (101) determines whether the internal combustion engine (12A) corresponds to either a no-load state or a low-load state. The internal combustion engine (12A) may be stopped. According to this configuration, even with a configuration including a carburetor and a catalyst, a complicated countermeasure structure such as a fuel cut can be eliminated, and the structure can be simplified.

The present invention also provides a throttle opening sensor (127) for detecting the throttle opening, a vehicle speed sensor (124) for detecting the vehicle speed, and a fuel injection means (223) for injecting fuel to the internal combustion engine (12A). Igniting means for igniting the internal combustion engine (12A), an idle stop condition is determined based on the throttle opening and the vehicle speed, and if the condition is met, the ignition means or the fuel An idle stop control unit (101) for stopping the internal combustion engine (12A) by stopping the injection means (223), and the idle stop control unit (101) starts the stop control. Then, after a predetermined time has elapsed, fuel is injected into the fuel injection means (223), and fuel for the next start is supplied into the internal combustion engine (12A). Motorcycle, and the predetermined time, characterized in that it is set on the basis of the average rotational speed of the internal combustion engine (12A) immediately before the start of the stop control.
It is characterized by keeping. According to the present invention, since the fuel for the next start is supplied into the internal combustion engine, the restartability can be improved.

Further, the prior SL predetermined time, because they are set on the basis of the average rotational speed of the internal combustion engine (12A) immediately before the start of the stop control, the stop time of the internal combustion engine is proportional to the rotational speed of the immediately preceding, correct Can be set easily. In this case, if the predetermined time is set to be longer as the average rotational speed is higher, the fuel for the next start can be reliably supplied into the internal combustion engine.
Further, in the above configuration, there is provided a tilt detecting means (251) for detecting the tilt state of the motorcycle, and the idle stop control unit (101) determines whether or not the vehicle is traveling off-road based on the tilt state. However, the stop of the internal combustion engine (12A) may not be permitted during off-road driving. According to this configuration, it is possible to prohibit idle stop during off-road driving.

The present invention determines the operating state of an internal combustion engine when a single operator of the idle control switch is operated, stops the internal combustion engine if the internal combustion engine is operating, and stops the internal combustion engine. If there is an idling stop control unit that starts the internal combustion engine, the idling stop and idling allowance can be appropriately performed while reducing the number of parts with a configuration including a manual switch for idling control.
The idle control switch is a switch in which the operation for stopping / permitting the idling of the internal combustion engine is the same operation, and the operation state of the internal combustion engine is determined for each operation and the internal combustion engine is in operation. If the internal combustion engine is stopped and the internal combustion engine is started when the internal combustion engine is stopped, idle stop and idle permission can be appropriately performed by simpler operation and control.
Further, when the operating element is operated, the rotational speed of the internal combustion engine is detected, and when the rotational speed exceeding zero is detected, the idling stop mode is entered. When the rotational speed is zero, the restart mode is entered and the starter motor that starts the internal combustion engine is driven.When the rotational speed exceeds the predetermined rotational speed, it is determined that the start is completed, and the starter motor is automatically stopped. It is possible to appropriately select idling stop or restart according to the rotational speed of the internal combustion engine.

The idle control switch is a seesaw switch in which a single operation element swings or a slide switch in which a single operation element slides. The idle stop control unit has a single operation element on one side. If operated, the internal combustion engine is stopped if the internal combustion engine is in operation, and if it is operated to the other side, the internal combustion engine is started if the internal combustion engine is stopped. Thus, it is possible to stop idling and allow idling.
In addition, when the single operator is operated to one side or the other side, the position is fixed to the operated side, and when the operated side is held for a predetermined time, the idle stop control is performed. If control is performed according to the side on which the part is operated, it is possible to reduce the burden on the crankshaft of the internal combustion engine and the like, and to reduce the power consumption of the starter motor.
Further, the single operation element is operated to one side or the other side only when there is an external operation force, and the rest is returned to the return position, and the idle stop control unit is operated to the other side. Meanwhile, if the starter motor for starting the internal combustion engine is driven to rotate, it is possible to apply the same simple control as when a conventional starter switch is operated.
Further, when the internal combustion engine is stopped by including a carburetor provided in the intake system of the internal combustion engine and a catalyst provided in the exhaust system of the internal combustion engine, whether or not the internal combustion engine falls into either a no-load state or a low-load state. If the internal combustion engine is stopped in a no-load or low-load state, it is possible to eliminate the need for a complicated countermeasure structure such as a fuel cut even in a configuration including a carburetor and a catalyst, and simplify the structure. be able to.

The idle stop control unit starts the stop control of the internal combustion engine in accordance with the idle stop condition, causes the fuel injection means to inject fuel after a lapse of a predetermined time, and supplies the fuel for the next start into the internal combustion engine. Therefore, restartability can be improved.
Further, if the predetermined time is set based on the average rotational speed of the internal combustion engine immediately before starting the stop control, an appropriate waiting time can be easily set. In this case, if the predetermined time is set to be longer as the average rotational speed is higher, the fuel for the next start can be reliably supplied into the internal combustion engine.
Further, the vehicle is provided with an inclination detection means for detecting the inclination state of the motorcycle, and the idle stop control unit determines whether or not the vehicle is off-road traveling based on the inclination state. If the stop is not permitted, idle stop can be prohibited during off-road driving.

1 is a left side view showing a motorcycle to which a first embodiment of the present invention is applied. It is the figure which showed the operating system of the motorcycle from upper direction. It is a block diagram which shows an idle stop control apparatus with a periphery structure. It is a figure which shows the switch for idle control with a periphery structure. It is a flowchart which shows control of an idle stop control apparatus. (A) is a right view of the throttle housing of 2nd Embodiment, (B) is a front view. (A) is AA sectional drawing of FIG.4 (B), FIG.5 (B) is BB sectional drawing of FIG.4 (B). It is a figure which shows the switch for idle control of 3rd Embodiment with a periphery structure. (A) shows the case where the operation element is at the center of the left and right (neutral position), (B) shows the case at the left ON position, and (C) shows the case at the right OFF position. is there. It is a flowchart which shows control of an idle stop control apparatus. It is a figure which shows typically the engine periphery structure of the motorcycle which concerns on 4th Embodiment. It is a figure explaining the map data which sets waiting time. It is a flowchart which shows operation | movement of an idle stop. FIG. 14 is a timing chart of engine speed corresponding to FIG. 13. It is a figure which shows typically the engine peripheral structure of the motorcycle which concerns on 5th Embodiment. It is a flowchart figure which shows operation | movement of an idle stop.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings. In the description, descriptions of directions such as front and rear, right and left and up and down are the same as directions with respect to the vehicle body unless otherwise specified. Also, in each figure, the symbol FR indicates the front of the vehicle body, the symbol UP indicates the upper side of the vehicle body, and the symbol L indicates the left side of the vehicle body.
<First Embodiment>
FIG. 1 is a left side view showing a motorcycle 1 to which a first embodiment of the present invention is applied.
The motorcycle 1 supports a relatively small power unit 12 in the front and rear center of the body frame 2, includes a fuel tank 10 above the power unit 12, and includes a passenger seat 16 behind the fuel tank 10. It is a riding type vehicle.
The vehicle body frame 2 includes a main frame 4 extending rearward and downward from a head pipe 3 provided at the front end, a pair of left and right seat rails 5 extending rearward from the rear end portion of the main frame 4, and a rear lower portion from the front end portion of the main frame 4. A pair of left and right down frames 6 extending to the rear, a pair of left and right center frames 7 extending rearward and rearward from the front end of the main frame 4 and connected to the rear end of the down frame 6, a seat rail 5 and a center frame 7 and a pair of left and right subframes 8 that bridge between the two.

A steering shaft (not shown) is rotatably supported on the head pipe 3, and a front fork 9 is attached to the steering shaft via a pair of upper and lower top bridges 19 and 20, and the front fork 9 is attached to the steering shaft. And rotate together.
A handlebar (handle) 21 is attached to the top bridge 19. A front wheel 31 is rotatably supported at the lower end of the front fork 9, and the front wheel 31 is steered left and right by the handlebar 21. A front fender 32 that covers the upper side of the front wheel 31 is attached to the front fork 9.
A key cylinder 22 and a cowl support stay 23 are attached to the top bridge 19 and the bottom bridge 20, and a front cowl 24, a meter unit 25, an inner cowl 26, and a pair of left and right front turn signals 30 are connected via the cowl support stay 23. A winker support stay 27 to be supported, a front number plate 28 and a headlight unit 29 are supported. The key cylinder 22 functions as a main switch operated by a mechanical key. When the main switch is turned off, the engine 12A, which will be described later, stops operation regardless of the situation of each part of the motorcycle 1. Is done.

A saddle type fuel tank 10 is attached to the main frame 4 so as to straddle the main frame 4 from above, and a pair of left and right pivot plates 11 is attached to the center frame 7. A swing arm 15 is supported on the pivot plate 11 via a pivot shaft 45 so as to swing up and down. The pair of left and right swing arms 15 extend rearward, and a rear wheel (drive wheel) 46 is rotatably supported at the rear end thereof. A pair of left and right rear cushions 47 are interposed between the swing arm 15 and the seat rail 5. It is.
A passenger seat 16 is attached to the left and right seat rails 5. The occupant seat 16 is formed into a long front and rear seat that allows a driver and a passenger to be seated at an interval in the front and rear, and a grab rail 40 held by the occupant is provided at the rear of the seat rail 5. It is attached. A rear side guard member 17 that covers the left side of the rear wheel 46, a helmet holder 41, and a rear fender 54 that covers the rear wheel 46 are attached to the seat rail 5. The rear fender 54 includes a rear turn signal 55 and a tail. A light 56 is attached.

The power unit 12 is supported by the main frame 4, the pivot plate 11, and the down frame 6 through the plurality of engine support portions 50 to 52, and is disposed in a space surrounded by the main frame 4, the center frame 7, and the down frame 6. .
The power unit 12 includes a horizontal engine (air-cooled single cylinder engine in this embodiment) 12A that is disposed substantially horizontally with a cylinder axis C inclined forward, and a cylinder 58 that extends forward from the front portion of the crankcase 57; And a cylinder head 59 provided at the front portion of the cylinder 58.
An intake device 60 and an exhaust device 61 are attached to the cylinder head 59. The intake device 60 is a carburetor 63 that is a fuel supply device disposed between the fuel tank 10 and the engine (internal combustion engine) 12 </ b> A, and an intake air that connects a front portion of the carburetor 63 and an intake port above the cylinder head 59. A pipe 62 and an air cleaner 65 connected to the rear part of the carburetor 63 via a connecting tube 64 are provided.

The exhaust device 61 includes an exhaust pipe 66 attached to an exhaust port below the cylinder head 59, and a muffler 67 attached to the rear end of the exhaust pipe 66. The muffler 67 is connected to the rear bar member 42 and the bar. It is supported via a muffler stay 68 attached to the tip of the member 42.
A catalyzer (catalyst) 69 is disposed in the muffler 67 to purify the exhaust gas and discharge it outside the muffler 67. The catalyzer 69 is not limited to the muffler 67 but may be provided in the middle of the exhaust pipe 66.

In the crankcase 57 of the power unit 12, the transmission of the crankshaft 71 rotated by the engine 12A is shifted and transmitted to the output shaft 72, and the power transmission between the crankshaft 71 and the transmission 12B is transmitted. A clutch 12C that can be shut off is disposed. The rotation of the output shaft 72 is transmitted to the rear wheel 46 via a chain transmission mechanism (power transmission mechanism) provided in the chain cover 49.
In FIG. 1, reference numeral 75 denotes a battery that stores electric power of a generator (not shown) that generates electric power using the rotational power of the engine 12 </ b> A, and electric components such as lights included in the vehicle body are driven by the electric power of the battery 75. .

A storage box 33 is disposed below the fuel tank 10. The storage box 33 is located between the main frame 4 and the power unit 12 and is attached to the lower part of the main frame 4 via a bracket 35. The storage box 33 is provided with a control unit (idling stop control unit) 101 described later.
The down frame 6 below the power unit 12 is attached with a pair of left and right steps 76 on which the driver who sits on the front portion of the passenger seat 16 and extends to the left and right of the power unit 12 and parks the motorcycle 1. A stand 77 is attached so as to be retractable.
In addition, a pair of left and right steps 43 on which a passenger sitting on the rear part of the occupant seat 16 places his / her feet is attached to the subframe 8 behind the power unit 12 via a bar member 42 extending rearward and downward.

FIG. 2 is a diagram showing the operating system of the motorcycle 1 from above. In FIG. 2, reference numeral C <b> 1 indicates a vehicle width center line of the motorcycle 1.
As shown in FIG. 2, a throttle (also referred to as a throttle grip) 81 operated by the driver (occupant) with the right hand is rotatably mounted on the right end portion of the handle bar 21 of the motorcycle 1. On the inner side in the vehicle width direction, a throttle housing 82 which is a case covering the base end portion of the throttle 81 is provided.
In the throttle housing 82, one end of a throttle cable CT (see FIG. 1) is connected to the throttle 81, and the rotation operation of the throttle 81 is transmitted to the throttle valve in the carburetor 63 via the throttle cable CT. As a result, the driver can manually change the throttle opening, change the intake amount of the engine 12A (amount of fuel-air mixture), and adjust the engine output.
The throttle housing 82 is provided with a push-down starter switch (start switch) 83 and an idle control switch 84 that the driver operates with the thumb of the right hand.

The starter switch 83 is a manual switch that instructs the start of the engine 12A. While the starter switch 83 is ON, the starter motor 85 provided at the upper portion of the power unit 12 is rotationally driven to start the engine 12A. Note that the starter switch 83 is biased to the OFF side, and is switched to ON only when pressed, and is switched to OFF when not pressed.
The idle control switch 84 is a manual switch for instructing to stop / restart the engine 12A. When the idle control switch 84 is operated, the engine 12A is ignited via an ignition device (ignition means) (not shown). Ignition control by a plug (not shown) is stopped, the engine 12A can be stopped, and the starter motor 85 is rotationally driven to restart the engine 12A.

A clutch lever 86 that is operated by the driver with the left hand is provided at the left end portion of the handle bar 21, and the operation of the clutch lever 86 is transmitted to the clutch 12C via the clutch cable CC, and the clutch 12C is intermittently connected. The clutch lever 86 is biased in a direction (front direction) away from the handle grip 87 with the base end as a fulcrum, and when the driver pulls the clutch lever 86 forward (when operated by the handle grip 87 side), When the clutch 12C is disengaged and the clutch lever 86 returns to the front (moves to the side opposite to the handle grip 87), the clutch 12C is engaged. That is, the clutch 12C of the motorcycle 1 is a manual clutch that operates only by the driver's operation.
On the inner side in the vehicle width direction of the handle grip 87, a switch housing 89 including a switch group 88 (a blinker switch 88A, a light switch 88B that serves as a headlight switch and a position light switch, etc.) operated by the driver with the thumb of the left hand is provided. It has been. By operating these switches, the blinkers 30 and 55 are blinked / turned off, the headlight 29A in the headlight unit 29 (see FIG. 3 to be described later) is turned on / off, and the position light 29B in the headlight unit 29 and the taillight 56 ( The lighting / extinguishing etc. of FIG. 3 described later is performed.

  On the left side of the power unit 12, a seesaw-type shift pedal (shift operation element) 91 that is operated by the driver with the left foot is provided so as to be swingable up and down. Switches. The transmission 12B is a constantly meshing transmission, and switches to any one of the first to fourth speeds and the neutral in a predetermined order every time the front part or the rear part of the shift pedal 91 is depressed. That is, the transmission 12B is a manual transmission (manual transmission) that operates only by the driver's operation.

A brake lever 92 that is operated by the driver with the right hand is provided on the right side of the handle bar 21, and a brake pedal 93 that is operated by the driver with the right foot is provided on the right side of the power unit 12. The brake lever 92 is urged in the direction away from the throttle 81 (forward direction) with the base end portion as a fulcrum in the same manner as the clutch lever 86, and the operation of the brake lever 92 is performed via a brake cable (not shown). It is transmitted to the front wheel brake. Specifically, when the driver pulls the brake lever 92 toward the front, the front wheel brake is activated.
The operation of the brake pedal 93 is transmitted to the rear wheel brake via a brake cable (not shown), and when the brake pedal 93 is depressed, the rear wheel brake is activated. When the brake lever 92 and the brake pedal 93 are operated, the brake light in the tail light 56 is turned on.
As described above, the motorcycle 1 is manually configured for adjusting the throttle opening, idling the engine 12A, disengaging the clutch 12C, switching the gear position (including neutral), and operating the brake. Therefore, a driving device such as an actuator is not used for these operations. For this reason, the vehicle body structure is simple and inexpensive (advantageous for cost reduction).

As shown in FIG. 2, a kick pedal 95 that is operated by the driver with the right foot is provided to be retractable and rotatable on the right side of the power unit 12 and behind the brake pedal 93. When the kick pedal 95 is rotated in the direction indicated by the arrow in FIG. 2, the driver can step on the kick pedal 95. When the engine is started, when the kick pedal 95 is pressed, the engine 12A is started. In other words, the motorcycle 1 can start the engine with either the starter motor 85 or the kick pedal 95. However, the configuration is not limited to this, and the engine may be started only by the starter motor 85.
In FIG. 2, reference numeral 96 denotes a pair of left and right side mirrors attached to the inside of the left and right grips (throttle 81, handle grip 87), more specifically, in the vicinity of the inside of the throttle housing 82 and the switch housing 89. .

By the way, if idling stop and idling permission (engine start) are performed with separate operators, the number of parts increases and the cost increases.
Therefore, in this embodiment, an idle stop control device 100 that performs idle stop and engine restart with a single operator is provided. Hereinafter, the idle stop control device 100 will be described.

FIG. 3 is a block diagram showing the idle stop control device 100 together with the peripheral configuration.
The control unit 101 is a computer (also referred to as an electronic control unit (ECU)) that centrally controls each part of the motorcycle 1, acquires information from each part of the vehicle body including the operation of the driver, and acquires the acquired information. Based on this, the controlled part (engine 12A or the like) is controlled. A starter switch 83, an idle control switch 84, and a switch group 88 (see FIG. 2) are connected to the control unit 101 as operation switches operated by the driver, and operations of the switches 83, 84, 88 are performed. Corresponding control is performed according to. That is, the control unit 101 functions as an idle stop control unit that performs idle stop / idle permission (engine start) when the idle control switch 84 is operated. An idling stop control unit may be provided separately.

In the motorcycle 1, an operating force applied by the driver to the shift pedal 91 is converted into a force that rotates the shift drum 111 in the transmission 12B by a predetermined angle. Along with the rotation of the shift drum 111, the gear positions of the plurality of gear trains of the transmission gear train 112 are switched, and a predetermined gear (1st to 4th gear) or neutral is selected. The clutch 12 </ b> C is switched to the released state by an operating force applied to the clutch lever 86.
The motorcycle 1 has an engine speed sensor (rotation speed detecting means) 123 for detecting the engine speed (the speed of the crankshaft 71) and a vehicle speed detected from the speed of a predetermined gear in the transmission gear train 112. A vehicle speed sensor (vehicle speed detecting means) 124 for detecting the gear position (including neutral) selected by the driver based on the rotation angle of the shift drum 111 is provided. Based on these detection results, the control unit 101 controls the ignition timing of the engine 12A and the like.

Further, an ON signal indicating that the key is inserted into the key cylinder 22 (see FIG. 1) and the main switch (main SW) is turned ON is input to the control unit 101, and this ON signal is input. The controller 101 performs engine control and idling stop control only during this time.
The control unit 101 also has a display management function for managing ON / OFF of the light in association with the idling stop control, and a notification function for notifying the occupant that the idling is being stopped. In FIG. 3, reference numeral 131 indicates a display system of the motorcycle 1. This display management function is a function for improving the visibility from the outside by turning on the position light 29B while the engine 12A is stopped by the idling stop control. In addition, while the engine 12A is stopped, the notification function turns on or blinks the idle stop indicator lamp 131 (see FIG. 3) provided in the meter unit 25 or the like, and has stopped by the idling stop control, or is malfunctioning. This is a function that informs the occupant if it has stopped.

  As shown in FIG. 4, the idle control switch 84 is formed by a push switch having a single push-down operation element 84S, and the operation element 87S can be pushed by a finger of the hand. It is configured as a switch that switches to ON when is pressed and switches to OFF when is not pressed. The operating element 84S is provided in a bulging case 82E that bulges inward in the vehicle width direction (the center of the left and right of the steering wheel) in the throttle housing 82, as in other embodiments described later.

In the motorcycle 1, when a key is inserted into the key cylinder 22 (see FIG. 1) and the main switch (main SW) is ON, the starter switch 83 and the idle control switch 84 are valid. When the starter switch 83 is pressed when the main switch is ON, the starter motor 85 is always driven to rotate if a predetermined start condition is satisfied. This starting condition is that the manual transmission 12B is neutral or that the manual transmission 12B is in-gear (a state where any gear position is selected) and the clutch 12C is released. The same as the conventional starting conditions.
As for the idle control switch 84 (idle stop switch 84A, start switch 84B), the corresponding control is performed when the main switch is ON and a predetermined condition described later is satisfied.

FIG. 5 is a flowchart showing the control of the idle stop control device 100. This flow is repeatedly executed at a predetermined interrupt cycle when the power is on (main switch is on).
First, when the idle control switch 84 is switched on (step S11), the control unit 101 determines the operating state of the engine 12A (step S12). This determination process is a process for determining whether the engine 12A is operating or stopped. In this embodiment, when the engine speed is detected and an engine speed exceeding zero is detected, the idling stop mode is set. Further, idling stop is permitted when the engine speed Ne1 becomes lower than a predetermined engine speed Ne1 (for example, the engine speed near the idle engine speed). On the other hand, when the detected engine speed is zero, the engine is restarted and the engine is allowed to start.

If it is determined in step S12 that the engine 12A is in operation (step S12: YES), that is, if idling stop is permitted in the idling stop mode, the control unit 101 determines whether or not the engine stop condition is satisfied. (Step S13), and when it is satisfied, after waiting for the elapse of a predetermined waiting time TA (in this embodiment, about 10 seconds) (step S14: standby processing), the idle stop control is executed (step S15), If not satisfied, the idle stop control is not executed and the process is temporarily suspended.
Note that the process of determining whether the engine 12A is in operation or stopped is based on the detection results of the engine speed sensor 123, the vehicle speed sensor 124, and the gear position sensor 125 instead of the method of determining based on the engine speed. Widely apply a known determination method such as a method for determining that the engine is operating when the vehicle speed is equal to or lower than the predetermined speed and the engine 12A is rotating or when the gear position is neutral and the engine 12A is rotating. Can do.

The waiting time TA is set to an expected time until the traveling motorcycle 1 stops. By providing the waiting time TA, for example, when the driver operates the operation element 84S at an early timing before the stop, the idle stop control can be executed after the stop.
The engine stop condition includes at least the operation element 84S, and further includes a catalyzer protection condition (catalyst protection condition) in the present embodiment.
The catalyzer protection condition is that the engine 12A is in a no-load or low-load state, and it is determined whether the engine 12A corresponds to either a no-load or a low-load state. Sometimes the engine 12A is stopped. Here, the control unit 101 adds a sensor (throttle opening sensor) for detecting the throttle opening when the engine rotation speed detected by the engine rotation speed sensor 123 is equal to or less than a predetermined threshold value. When the opening degree is equal to or less than the predetermined opening degree, the engine 12A determines that there is no load or a low load state. Further, other known load determination methods may be applied. The threshold value of the engine speed is, for example, an idle speed of the engine 12A or a speed close to the idle speed. The threshold value of the engine speed is, for example, an idle speed of the engine 12A or a speed close to the idle speed.

As described above, since the motorcycle 1 has a negative pressure type configuration in which fuel is supplied by the carburetor 63, the fuel supply is performed as compared with the case where an electric injector (fuel injection device (fuel injection means)) is used. It is difficult to stop suddenly.
Therefore, in the configuration including the carburetor 63 and the catalyzer (catalyst) 69 provided in the exhaust system, the ignition control is stopped by operating the idle stop switch 84A while a large amount of air-fuel mixture is being sent to the engine 12A. Then, the sudden stop of unburned gas (unburned fuel) is delayed, and a complicated countermeasure structure such as fuel cut is required.
In this configuration, the engine 12A does not execute the idle stop control unless it is in a no-load or low-load state that does not require this complicated countermeasure structure, so that the structure can be simplified.

In this way, when the operation element 84S is operated and the catalyzer protection condition (catalyst protection condition) is satisfied, the idle stop control is executed, so that the catalyzer 69 is protected and the driver's manual operation is performed. I can stop idle.
In the idle stop control of the present embodiment, in order to suppress an increase in power consumption of the battery 75 in the case of idling stop when the headlight 29A is turned on, in addition to the control to stop the ignition control of the engine 12A and stop the engine 12A. When the idle stop control is entered, the headlight 29A is turned off and the position light 29B is turned on, so that the engine 12A is automatically turned off by the idling stop control while the headlight 29A is automatically turned off and the position light 29B is turned on. Automatic lighting is performed to achieve both reduction of power consumption and improvement of visibility from the outside. Further, during the automatic stop of the engine 12A, the idle stop indicator lamp 131 (see FIG. 3) provided in the meter unit 25 or the like is turned on or blinked to stop the idling stop control, or Inform the occupants if they stopped due to problems. Even during this idle stop control, the blinkers 30, 55, the brake light 56A (see FIG. 3) in the tail light 56, and the like can be operated.

On the other hand, when it is determined in step S12 that the engine 12A is stopped (step S12: NO), that is, when the engine start is permitted in the restart mode, the control unit 101 satisfies the engine restart condition. (Step S20), and if satisfied, after waiting for the elapse of a predetermined waiting time TB (in this embodiment, about 10 seconds) (step S21: standby processing), the starter motor to start the engine 12A 85 is turned on (driving state) (step S22). If not satisfied, the starter motor 85 is not turned on and the process is temporarily suspended.
This waiting time TB is set to a time corresponding to a time lag from the start of idling stop (start of engine stop) to the complete stop of engine 12A. By providing this waiting time TB, it is possible to avoid a situation in which the starter motor 85 starts to operate before the engine 12A is completely stopped and a load is applied to the crankshaft 71 and the like. Thereby, engine protection at the time of engine restart can be aimed at.

  The engine restart condition includes at least the operation element 84S, and further includes the condition of the manual transmission 12B in the present embodiment. The conditions of the manual transmission 12B are the same as the start conditions of the starter motor 85, that is, the manual transmission 12B is neutral based on the detection result of the gear position sensor 125, or the manual transmission 12B. Is in-gear and the clutch 12C is open.

After the starter motor 85 is turned on (driven), the control unit 101 monitors whether or not the engine 12A has started (step S23), and more specifically, the engine speed is a predetermined speed Ne2 (for example, When the engine speed reaches a value slightly higher than the idling engine speed (step S23: YES), the starter motor 85 is turned off (stopped) (step S25). Thus, when the start switch 84B is operated and the conditions of the manual transmission 12B are satisfied, the engine 12A is started, so that the engine can be appropriately started according to the manual operation of the driver.
However, after the starter motor 85 is turned on, if the engine 12A does not start even after a predetermined set time has elapsed (step S24: YES), the control unit 101 turns off the starter motor 85 (step S25). . Thereby, it is possible to avoid a situation where the starter motor 85 is continuously driven when there is an unintended defect.

As described above, according to the present embodiment, when the single operator 84S included in the idle control switch 84 is operated, the operating state of the engine 12A is determined, and the engine 12A is operating. If the engine 12A is stopped and the engine 12A is stopped, the engine 12A is started. Therefore, it is possible to perform idle stop and idle permission with a configuration including a manual switch for idle control.
In this case, the engine 12A is stopped if the engine 12A is in operation, and the engine 12A is started if the engine 12A is stopped. It is possible to avoid a situation where stop control (idle stop control) is performed. Accordingly, it is possible to appropriately perform idle stop and idle permission while reducing the number of parts.

Further, when the single operation element 84S is operated, the engine speed is detected, and when the engine speed exceeding zero is detected, the idling stop mode is set, and when the engine speed Ne1 or less is reached, the engine is idled. When the engine speed is zero, the restart mode is entered and the starter motor 85 is driven. When the engine speed Ne2 or higher is reached, it is determined that the start is complete, and the starter motor 85 is automatically stopped. Depending on the engine speed, it is possible to appropriately select idling stop or restart.
Moreover, the operating state of the engine 12A is determined for each operation of the operator 84S in which the operation for stopping / permitting idle is the same operation. If the engine 12A is operating, the engine 12A is stopped, and the engine 12A Since the engine 12A is started when the engine is stopped, idle stop and idle permission can be appropriately performed by simple control. According to this configuration, it is not necessary for the driver to change the operation between idle stop and idle permission, and the operation can be simplified.
Since the motorcycle 1 includes the key cylinder 22 that functions as a main switch capable of stopping the engine 12A, in addition to the idle control switch 84, the engine 12A is stopped by the key cylinder 22 in the same manner as before when the vehicle gets off. In other words, the key cylinder 22 can be used exclusively for getting on and off, and the idle control switch 84 can be used exclusively for driving.

In addition, when the single operation element 84S is operated, the control corresponding to the operation is performed after the elapse of the predetermined time TA and TB. Therefore, when the engine 12A is started, the engine 12A can be started after the engine 12A is completely stopped. It is possible to avoid a situation in which a load is applied to the crankshaft 71 of the engine 12A. When stopping the engine 12A, the engine 12A can be stopped after the motorcycle 1 is stopped.
In this configuration, when the engine 12A is stopped in response to the operation of the idle control switch 84, it is determined whether the engine 12A corresponds to either a no-load state or a low-load state, and the no-load or low-load state is determined. Since the engine 12A is stopped in the state, even in the configuration including the carburetor 63 and the catalyzer 69, a complicated countermeasure structure such as fuel cut can be dispensed with, and the structure can be simplified.

Second Embodiment
In the second embodiment, the idle control switch 84 is a seesaw switch in which a single operator 84S swings. 6A is a right side view of the throttle housing 82, and FIG. 6B is a front view. 7A is a cross-sectional view taken along the line AA in FIG. 4B, and FIG. 7B is a cross-sectional view taken along the line BB in FIG. 6B. In addition, in each figure, the code | symbol LT has shown the rotating shaft (= axis line of the handle bar 21) of the throttle 81. FIG.
6 (A) and 6 (B), the throttle housing 82 is composed of a pair of upper and lower cases 82A and 82B connected so as to sandwich the handlebar 21 from above and below. The throttle housing 82 is formed at the base end portion of the throttle 81. A storage portion 82C for storing the provided large-diameter drum 81D and a starter switch portion 82D extending downward from the storage portion 82C and provided with a starter switch 83 are integrally provided. Then, by attaching one end of the throttle cable CT (see FIG. 1) to the drum 81D, the throttle cable CT is wound up or pulled out according to the rotation of the throttle 81, and is connected to the other end of the throttle cable CT. The attached throttle valve is opened and closed.

  Further, the throttle housing 82 integrally has a bulging case 82E (see FIGS. 6B and 7B) that bulges inward in the vehicle width direction (center of the left and right of the handle) from the storage portion 82C. An idle control switch 84 is provided at a position avoiding the exit case 82E, that is, the drum 81D. In this case, a recess 82F that is recessed toward the rotation axis LT is provided at the rear upper part of the bulging case 82E, and an idle control switch 84 is provided by using the space of the recess 82F. As a result, the idle control switch 84 can be disposed at a position where it can be easily operated toward the driver, and the amount of protrusion from the throttle housing 82 can be suppressed. Further, since the idle control switch 84 is arranged with a gap in the vehicle width direction (left-right direction) and the up-down direction with respect to the starter switch 83, both switches 83, 84 can be arranged so that they are not easily operated.

The idle control switch 84 is formed by a seesaw switch including a single operation element 84S that swings with the intermediate part 84C as a fulcrum, and either one of the end parts (pressing parts 84A, 84B) in the longitudinal direction of the operation element 84S. (See FIG. 6 (A)) can be pushed in with a finger of a hand, and is configured by a single switch that switches from OFF to ON when one of the pressing parts (the pressing part 84B in this embodiment) is pressed. Yes.
The two pressing portions 84A and 84B are arranged in order along the rotation direction of the throttle 81, and the pressing portion 84A on the throttle closing side functions as an idle stop switch that prohibits idling of the engine 12A. Portion 84B functions as a start switch that permits idling of engine 12A.
In this configuration, when one of the pressing portions 84A and 84B is pressed, the switch structure that is held in the pressed state, that is, the single operating element 84S is operated to one side or the other side in the swing direction. Then, the position is fixed to the operated side. For this reason, the state (see FIG. 6 (A)) in which the pressing unit 84B that permits idling of the engine 12 is pressed is a state during normal operation (normal state). Can be operated as usual. Hereinafter, in order to make the explanation easy to understand, they are appropriately described as an idle stop switch 84A and a start switch 84B. Since the control of the idle stop control device 100 is substantially the same as that of the first embodiment, different portions will be described in detail.

In this embodiment, when any one of the switches 84A and 84B of the idle control switch 84 is operated and the switch is switched ON / OFF (step S11), the control unit 101 determines the operating state of the engine 12A (step S12). ). If it is determined in step S12 that the engine 12A is in operation (step S12: YES), the control unit 101 determines whether or not the engine stop condition is satisfied (step S13). After waiting for elapse of the waiting time TA (about 10 seconds in the present embodiment) (step S14: standby processing), the idle stop control is executed (step S15). If not satisfied, the idle stop control is not executed. Suspend processing.
The engine stop condition of this embodiment is a state in which at least the idle stop switch 84A is operated, and in this embodiment, further includes a catalyzer protection condition (catalyst protection condition). For this reason, when the idle stop switch 84A is operated and the catalyzer protection condition (catalyst protection condition) is satisfied, the idle stop control is executed to protect the catalyzer 69, and the idle according to the manual operation of the driver. You can stop.

On the other hand, if it is determined in step S12 that the engine 12A is stopped (step S12: NO), the control unit 101 determines whether or not the engine restart condition is satisfied (step S20). After waiting for elapse of a predetermined waiting time TB (in this embodiment, about 10 seconds) (step S21: standby process), the starter motor 85 is turned on (driving state) to start the engine 12A (step S22), and the condition is not satisfied. In this case, the starter motor 85 is not turned on and the processing is temporarily interrupted.
The engine restart condition of the present embodiment is a state in which at least the start switch 84B is operated. In the present embodiment, the condition of the manual transmission 12B is further included. The conditions of the manual transmission 12B are the same as the start conditions of the starter motor 85, that is, the manual transmission 12B is neutral based on the detection result of the gear position sensor 125, or the manual transmission 12B. Is in-gear and the clutch 12C is open. For this reason, when the start switch 84B is operated and the engine restart condition is satisfied, the starter motor 85 can be driven and the engine 12A can be restarted appropriately.

According to this configuration, the idle control switch 84 is a seesaw switch, and when the single operator 84S is operated to one side, the engine 12A is stopped if the engine 12A is in operation, and the other side When the engine 12A is operated, the engine 12A is started if the engine 12A is stopped. Therefore, the operation is simple.
In the present embodiment, a return structure is provided for returning the operation element 84S of the idle control switch 84 to an intermediate position (a position between a state where the operation element 84S is pressed on one side and a state where it is pressed on the other side). 84S may be configured to swing according to the operating force only while being operated from outside, and to return to the return position otherwise.
In this way, when the idle control switch 84 is a switch with a return function, the starter motor 85 is driven to rotate only while the start switch 84B is pressed instead of the processing of steps S22 to S25. It is possible to apply the same simple control as when the switch is operated.

<Third Embodiment>
In the third embodiment, as shown in FIG. 8, the idle control switch 84 is a slide switch in which a single operator 84S slides left and right. FIG. 9 is a schematic diagram showing a configuration example of the idle control switch 84. FIG. 9A shows the case where the operation element 84S is at the center of the left and right (neutral position), and FIG. FIG. 9C shows the case of being in the left ON position, and FIG. 9C shows the case of being in the right OFF position.
Also in this embodiment, the throttle housing 82 is provided with a bulging case 82E that bulges inward in the vehicle width direction with respect to the drum 81D provided at the base end portion of the throttle 81. The bulging case 82E is provided with a driver. An idle control switch 84 is provided so that it can be operated with the thumb.

The idle control switch 84 is formed of a switch that is turned ON when the single operation element 84S is operated to the left side and turned OFF when the single operation element 84S is operated to the right side.
More specifically, as shown in FIG. 9 (A), the idle control switch 84 includes a single contact (first contact ST1, common contact ST2, second contact ST3) with a single interval. And a conductive member 84T that is moved by the operation element 84S. When the operation element 84S is in a neutral position at the center of the left and right, the conduction member 84T contacts only the common contact ST.
As shown in FIG. 9B, when the operating element 84S moves to the left ON position, the conducting member 84T conducts to the first contact ST1 and the common contact ST2, and this state is set as the switch ON and the control unit. 101. Further, as shown in FIG. 9C, when the operation element 84S moves to the right OFF position, the conducting member 84T conducts to the second contact ST3 and the common contact ST2, and this state is set as the switch OFF. It is detected by the control unit 101.

  The idle control switch 84 is configured as a switch with a return function that returns to an intermediate position (corresponding to the neutral position) when the single operation element 84S is slid to any of the positions. . As the control at the time of operating the switch, the control shown in FIG. 6 of the first embodiment may be applied. Instead of the processing of steps S22 to S25 in FIG. 5, the starter motor is only pressed while the start switch 84B is pressed. A simple process of rotating and driving 85 may be applied.

  In this manner, various effects similar to those of the above-described embodiment can be obtained even with the configuration using the slide switch. Also in this embodiment, the operation element 84S of the idle control switch 84 may have a switch structure in which the position is fixed on the operated side.

In the first embodiment, the flow shown in FIG. 10 may be applied instead of the flow shown in FIG.
In this case, when the idle control switch 84 is switched on (step S11), the control unit 101 determines the operating state of the engine 12A (step S12), and executes the idle stop control if the engine 12A is operating. (Step S14). On the other hand, if engine 12A is stopped, control unit 101 turns on starter motor 85 (drive state) to start engine 12A (step S22), and starts engine 12A (step S23: YES). The motor 85 is turned off (stopped state) (step S25).
That is, the “process for determining whether or not the engine stop condition is satisfied (step S13)” and the “process for determining whether or not the engine restart condition is satisfied (step S20)” shown in FIG. 5 are not performed. Simple control. In addition, you may abbreviate | omit the process of these steps S13 and 20 also in other embodiment other than 1st Embodiment.

<Fourth embodiment>
In the first to third embodiments, the case where the engine 12A is stopped (idle stop) according to the operation of the manual switch (idle control switch 84) has been described.
On the other hand, a conventional motorcycle has a throttle opening sensor (throttle opening detecting means) for detecting the throttle opening, a vehicle speed sensor for detecting the vehicle speed, and an injector (fuel injection device ( And an ignition device (for example, an ignition coil) that ignites the engine. In this motorcycle, the idle stop condition is determined based on the throttle opening, the vehicle speed, and the like, and when this condition is met, automatic idle stop control is performed to stop the engine by stopping the ignition device and injector. There are some (for example, refer to JP 2012-77657 A).
In a motorcycle equipped with this type of automatic idle stop function, it is desired to further improve the restartability. Therefore, an object of the present embodiment is to provide a motorcycle that can improve restartability after idle stop.

FIG. 11 schematically shows an engine peripheral structure of the motorcycle 1 according to the fourth embodiment. In addition, the same structure as 1st Embodiment etc. attaches | subjects the same code | symbol, and abbreviate | omits the overlapping description.
The engine 12 </ b> A includes a cylinder 58 in which a piston 203 connected to a crankshaft 71 via a connecting rod 202 is slidable, and a cylinder head 59 that covers an upper portion of the cylinder 58. The cylinder head 59 has an intake port 211 and an exhaust port 212 communicating with the combustion chamber 210 facing the top of the piston 203, and an ignition device (ignition means) that drives the ignition plug 215 to ignite the air-fuel mixture in the combustion chamber 210. 216, an intake valve 217 for opening and closing the intake port 211, and an exhaust valve 218 for opening and closing the exhaust port 212 are provided.
An intake passage 211 is connected to the intake port 211, and an air cleaner 65 (see FIG. 1), a throttle body 222 that is an intake air amount variable device, and an injector 223 that is a fuel injection device are provided in this intake passage 221 in order from upstream. Then, the supply amount of the air cleaned by the air cleaner 65 is adjusted by a throttle valve (also referred to as an intake throttle valve) 224 of the throttle body 222 and supplied to the combustion chamber 210 together with the fuel supplied from the injector 223. The injector 223 is supplied with fuel by a fuel pump (not shown).

The intake port 211 and the exhaust valve 218 are driven in synchronization with the rotation angle of the crankshaft 71 by a known valve operating mechanism, and correspond to each process (intake stroke, compression stroke, combustion stroke, exhaust stroke) of the 4-cycle engine. Valve drive is performed.
The motorcycle 1 also includes a throttle opening degree sensor 127 that is a throttle opening degree detecting means for detecting the throttle opening degree, and a crank angle detecting means (engine speed detecting means for detecting the rotation angle (crank angle) of the crankshaft 71. ) Engine rotational speed sensor 123, cam angle sensor 128 for detecting the rotational angle of intake and exhaust valves 217 and 218, and vehicle speed sensor (vehicle speed detecting means) 124. Using the detection result, the ignition timing of the ignition device 216, the fuel injection timing and the fuel injection amount of the injector 223 are controlled. In addition, about this structure and control (control at the time of normal operation), a well-known thing can be applied widely.

The control unit 101 includes a storage unit 101M that stores various types of data such as various programs and map data. By executing a predetermined control program stored in the storage unit 101M, an idle stop (engine stop) can be performed. Idle stop control for performing idle start (engine restart) is executed, that is, it functions as a main part of the idle stop control device 100.
In the present embodiment, as the idle stop control, automatic idle stop control for stopping / starting the engine 12A based on the detection result of the sensor is performed, and after the stop control of the engine 12A is started by this automatic idle stop control, the injector Fuel injection control (hereinafter referred to as fuel injection control during idle stop) is performed in which fuel is injected into 223 and fuel to be supplied for the next start is supplied into the engine 12A.
Further, in the motorcycle 1 of the present embodiment, the clutch 12C (see FIG. 1) capable of interrupting power transmission between the crankshaft 71 and the transmission 12B is configured by a centrifugal clutch, and the engine speed is low. The clutch 12C is automatically disengaged when it is rotated.

Data for setting an engine stop condition (also referred to as an idle stop condition) and an engine start condition (also referred to as an idle start condition) are stored as data used for the automatic idle stop control. As the engine stop condition, a condition that can be estimated that the motorcycle 1 stops based on the sensor is set. Specifically, the throttle opening degree 127 and the vehicle speed sensor 124 are used to make the throttle opening degree zero, and the vehicle speed falls below a predetermined threshold speed, or the vehicle speed sensor 124 is used to detect the vehicle speed. Various known conditions such as falling below the threshold speed apply.
Further, as the engine start condition, a condition for determining that the vehicle is stopped based on the sensor or the like is set. Specifically, various known conditions such as the throttle opening being opened from zero to a predetermined threshold or more using the throttle opening sensor 127 are appropriately applied.

  For this reason, the control unit 101 determines an idle stop condition (engine stop condition) based on the throttle opening sensor 127 and / or the vehicle speed sensor 124, and when the condition is met, the ignition device 216 and the injector 223 are detected. Is controlled so that the starter motor 85, the ignition device 216, the injector 223, etc. can be driven and automatically restarted when the idle start condition (engine start condition) is determined and the condition is met. become. In addition, well-known control is widely applicable about this automatic idle stop control.

As data used for the idle stop fuel injection control, data for setting a waiting time (fuel injection waiting time) T from the start of engine 12A stop control (idle stop) to the start of fuel injection is stored. ing.
Here, since the engine 12A of the motorcycle 1 is driven at various rotational speeds, the engine rotational speed at the start of idling stop is often different, and the time from the inertia to the engine rotational speed becoming zero, that is, The stop time until the engine 12A stops is also different.

For this reason, if the waiting time T is set to a constant value, when the engine speed immediately before the stop is in a high speed range, the stop time becomes long, and even after fuel is injected after the waiting time T elapses. There is a possibility that the engine 12A continues to rotate, the exhaust valve 218 opens a plurality of times, and the fuel is exhausted to the outside. Further, when the engine speed immediately before the stop is in a low speed range, the stop time is shortened. Therefore, during the fuel injection after the waiting time T has elapsed, the engine 12 is stopped with the intake valve 217 closed. There is a risk of it. In this case, sufficient fuel cannot be sent into the engine 12A.
Therefore, in the present embodiment, map data using the engine speed immediately before the engine is stopped as a parameter is applied as data for setting the waiting time T, and as shown in FIG. The higher the waiting time T is, the longer the waiting time T is set, so that the fuel for the next start can be reliably and sufficiently supplied into the engine 12A.

  FIG. 13 is a flowchart showing the idle stop operation, and FIG. 14 is a timing chart of the engine speed Ne in this case. This flow is executed when the motorcycle 1 is running with the power turned on (main switch is turned on). Further, the control unit 101 performs an average engine speed calculation process for calculating the average engine speed NeA except when the engine is stopped. As this calculation process, the engine speed Ne detected by the engine speed sensor 123 is acquired at a predetermined cycle, an average value thereof is obtained and temporarily stored in the storage unit 101M, and the stored average engine speed is stored. A process of overwriting NeA is performed.

First, the control unit 101 determines whether an idle stop condition (engine stop condition) is satisfied (step S51), and waits until the condition is satisfied. When this condition is satisfied at time t1 (see FIG. 14) (step S51: YES), the control unit 101 controls to stop the ignition device 216 (step S52) and controls to stop the injector 223 (step S53). The stop control of the engine 12A is started by the stop control of the ignition device 216 and the injector 223.
Next, the control unit 101 obtains an average engine speed NeA before starting the stop control of the engine 12A, and refers to the map data shown in FIG. 12 as the engine speed Ne immediately before the engine is stopped. Thus, the waiting time T is searched (step S54).
In this case, since the average engine speed NeA immediately before the engine stop is specified, the measurement error due to the influence of the measurement timing can be reduced as compared with the method of acquiring the engine speed immediately before the stop at a single timing. it can.

Next, the control unit 101 determines whether or not the elapsed time tm from the start of the stop control of the engine 12A exceeds the waiting time T (steps S55 and S56), and when the waiting time T is reached (see FIG. 14). At the indicated time t2), fuel is injected into the injector 223 by a predetermined amount (a constant amount in this embodiment) (step S57).
Thus, since the fuel injection timing is set according to the engine speed immediately before the engine is stopped, the fuel can be injected within the period H1 immediately before the engine stop shown in FIG. 14 according to the engine speed.

As shown in FIG. 14, this period H1 is within the period of one cycle immediately before the engine 12A is stopped (one cycle of the four-cycle engine), that is, the period H1 is one immediately before the engine 12 is stopped. The waiting time T is set so as to be within the cycle. For this reason, fuel can be injected within a period (either an intake stroke or an exhaust stroke) in which the intake valve 217 before the engine is reliably opened, and fuel can be reliably supplied into the engine 12A.
Further, since the engine 12A is stopped when the fuel injection is completed, it is possible to avoid a situation in which the fuel in the engine 12A is discharged to the outside.

Thereby, the fuel for the next start can be reliably supplied into the engine 12A. As a result, it is possible to improve the startability at the next start, that is, the idle start (engine restart).
The example of FIG. 14 shows a case where an idle start condition (engine start condition) is satisfied at time t3. In that case, the control unit 101 first drives the starter motor 85, and then drives the ignition device 216 at a subsequent time point t4 to immediately start the engine 12A immediately after the time point t4 using the fuel in the engine 12A. be able to.

As described above, according to the present embodiment, the fuel to be supplied to the engine 12A for the next start is started after the stop control of the idle stop is started and fuel is injected after a predetermined waiting time (fuel injection waiting time) T has elapsed. Therefore, it is possible to improve restartability.
Moreover, since the waiting time T is set based on the average engine speed (average speed) NeA immediately before starting the stop control, the immediately preceding engine speed can be specified with high accuracy, and according to the immediately preceding engine speed. The waiting time T can be set.
As described above, since the engine stop time is proportional to the immediately preceding engine speed, it is possible to easily set an appropriate waiting time T for supplying fuel to be used for the next start in the engine 12A. Specifically, by setting the waiting time T to a longer time as the average engine speed NeA is higher, fuel can be injected during the period when the intake valve 217 immediately before the engine stops is opened, and used for the next start in the engine 12A. It becomes possible to supply fuel reliably. Thereby, restartability can be improved reliably.

<Fifth Embodiment>
By the way, the motorcycle 1 includes an off-road vehicle capable of traveling not only on a so-called on-road (paved road) but also on an off-road (unpaved road) such as rough terrain. When the idling stop control device 100 of the fourth embodiment is applied to an off-road vehicle, the clutch is disengaged during off-road driving, the vehicle speed is low, and the idling is forced even when the throttle becomes almost zero. The stop is executed, and a situation that does not satisfy the user's request in off-road driving occurs. Therefore, an object of the present embodiment is to provide a motorcycle capable of prohibiting idling stop during off-road driving.

FIG. 15 schematically shows an engine peripheral structure of the motorcycle 1 according to the fifth embodiment. The motorcycle 1 includes the idle stop control device 100 of the fourth embodiment, and is thus a vehicle capable of off-road traveling having an automatic idle stop function. In addition, about the structure similar to 4th Embodiment, the same code | symbol is attached | subjected and the overlapping description is abbreviate | omitted.
The motorcycle 1 includes an inclination sensor (inclination detection means) 251 that detects the inclination state of the motorcycle 1, and the detection result is output to the control unit 101.
The tilt sensor 251 includes a roll angle sensor 252 that detects a roll angle of the motorcycle 1 (an angle formed between the left and right axis of the vehicle body and the ground (also referred to as a bank angle)), and a pitch angle (a front and rear axis of the vehicle body and the ground). And a pitch angle sensor 253 that detects an angle formed). In addition, the structure which detects both a roll angle and a pitch angle using single sensors, such as a gyro sensor, may be sufficient.

In the present embodiment, the control unit 101 performs an inclination state accumulation process for accumulating the detection result of the inclination sensor 251 except when the engine is stopped. In this process, the history of the roll angle and the pitch angle detected by the tilt sensor 251 is accumulated in the storage unit 101M at least during traveling immediately before the idle stop.
The history of the roll angle and pitch angle indicates in what inclination the motorcycle 1 is traveling. Based on the history information, the control unit 101 presets a condition (off-road determination condition) for determining whether or not the vehicle is traveling off-road, and determines whether or not the off-road determination condition is satisfied. Thus, it is possible to detect whether or not the vehicle is traveling off-road. As an example, the off-road determination condition is that the absolute angle of the pitch angle or roll angle is a steep slope exceeding a predetermined threshold angle, or the pitch angle changes with a short period of uphill and downhill. What is necessary is just to apply that it was a change indicating that the vehicle is running.
Data for setting the offload determination condition, program data for performing various processes, and the like are also stored in advance in the storage unit 101M.

FIG. 16 is a flowchart showing an idle stop operation.
In the present embodiment, as shown in FIG. 16, when the idle stop condition (engine stop condition) is satisfied (step S51), the control unit 101 stores the roll angle and pitch angle information stored in the storage unit 101M. Based on the above, it is determined whether or not the vehicle is traveling off-road (step S61).
When the vehicle is not traveling off-road (step S61: NO), the control unit 101 proceeds to the subsequent step S52 to perform engine stop control or the like, and performs idle stop.
On the other hand, when the vehicle is traveling off-road (step S61: NO), the control unit 101 proceeds to step S51 and determines again whether or not the condition for idling stop is satisfied. That is, when the vehicle is traveling off-road, idle stop such as engine stop control can be prohibited without shifting to the processing after step S52.

In other words, in the present embodiment, it is determined whether or not the vehicle 1 is off-road traveling based on the inclination state of the motorcycle 1. When the vehicle is not off-road traveling, idling stop is permitted. Do not allow idle stop. Thus, in addition to the effects of the above embodiments, it is possible to prohibit idle stop during off-road driving.
In the present embodiment, the case where the sensor tilt sensor (tilt detection means) 251 for detecting the roll angle and the pitch angle of the motorcycle 1 is illustrated, but the present invention is not limited to this, and either the roll angle or the pitch angle is provided. A tilt sensor (tilt detection means) for detecting the vehicle may be provided, and it may be configured to determine whether or not the vehicle is traveling off-road based on the detection result of the sensor.

The above-described embodiment is merely an aspect of the present invention, and can be arbitrarily modified and applied without departing from the gist of the present invention.
For example, in the above embodiment, the starter switch 83 may be omitted, and the idle control switch 84 may also serve as the starter switch. Further, the configuration of starting the engine with the kick pedal 95 may be omitted.
Further, in the above-described embodiment, a case where the control unit 101 functions as an idle stop control unit that performs control according to the operation of the switches 83 and 84 and a load state determination unit that determines the load state of the engine 12A will be described. However, these may be configured by separate hardware.
The “fuel injection control during idle stop” in the fourth embodiment and the “control for prohibiting idle stop during off-road driving” in the fifth embodiment are limited to the motorcycle according to the fourth or fifth embodiment. Instead, it may be applied to various motorcycles. For example, the control of the fifth embodiment may be applied to the motorcycle described in the first to third embodiments.
Further, the present invention is not limited to the case where the present invention is applied to the motorcycle 1, but can also be applied to saddle riding type vehicles including those other than motorcycles. The saddle-ride type vehicle includes all vehicles that ride on the vehicle body, and includes not only motorcycles (including bicycles with motors) but also three-wheeled vehicles and four-wheeled vehicles classified as ATVs (rough terrain vehicles). It is a vehicle including.

1 Motorcycle (saddle-ride type vehicle)
2 Body frame 12 Power unit 12A Engine (internal combustion engine)
12B Transmission (manual transmission)
12C clutch (manual clutch)
22 Key cylinder 46 Rear wheel (drive wheel)
63 Carburetor (fuel supply device)
69 Catalyzer
81 Throttle 84 Idle control switch 84S Operating element 85 Starter motor 100 Idle stop control device 101 Control unit (idle stop control unit, load state determination means)
123 engine speed sensor (engine speed detection means)
124 vehicle speed sensor (vehicle speed detection means)
127 throttle opening sensor (throttle opening detecting means)
216 Ignition device (ignition means)
223 injector (fuel injection device (fuel injection means))
251 Tilt sensor (tilt detection means)
TA, TB, waiting time T waiting time (fuel injection waiting time)

Claims (12)

In a motorcycle having a manual transmission (12B) that shifts the rotation of the internal combustion engine (12A) and transmits it to the drive wheels (46),
An idle control switch (84) having a single operation element (84S), and when the single operation element is operated, an operating state of the internal combustion engine (12A) is determined, and the internal combustion engine (12A) An idle stop control unit (101) for stopping the internal combustion engine (12A) when the engine is in operation, and starting the internal combustion engine (12A) when the internal combustion engine (12A) is stopped ,
The idle stop control unit (101) detects the rotational speed of the internal combustion engine (12A) when the operating element (84S) is operated, and enters an idling stop mode when a rotational speed exceeding zero is detected. The idling stop is permitted when the rotational speed is less than or equal to a predetermined rotational speed (Ne1), and when the rotational speed is zero, the restart mode is entered, and the starter motor (85) for starting the internal combustion engine (12A) is driven to The starter motor (85) is automatically stopped when the number of revolutions (Ne2) or more is determined, and the starter motor (85) is automatically stopped .   In a motorcycle having a manual transmission (12B) that shifts the rotation of the internal combustion engine (12A) and transmits it to the drive wheels (46)
  An idle control switch (84) having a single operation element (84S), and when the single operation element is operated, an operating state of the internal combustion engine (12A) is determined, and the internal combustion engine (12A) An idle stop control unit (101) for stopping the internal combustion engine (12A) when the engine is in operation, and starting the internal combustion engine (12A) when the internal combustion engine (12A) is stopped,
  The idle control switch (84) is a seesaw switch in which the single operator (84S) swings or a slide switch in which the single operator (84S) slides.
  The idle stop control unit (101) stops the internal combustion engine (12A) when the single operation element (84S) is operated to one side and the internal combustion engine (12A) is in operation. If the internal combustion engine (12A) is stopped when operated to the other side, the internal combustion engine (12A) is started,
  When the single operation element (84S) is operated to one side or the other side, the position is fixed to the operated side, and when the single operation element (84S) is operated The idle stop control unit (101) performs control according to the operated side after waiting for a predetermined waiting time. In a motorcycle having a manual transmission (12B) that shifts the rotation of the internal combustion engine (12A) and transmits it to the drive wheels (46)
  An idle control switch (84) having a single operator (84S);
  When the single operating element is operated, the operating state of the internal combustion engine (12A) is determined. If the internal combustion engine (12A) is operating, the internal combustion engine (12A) is stopped, and the internal combustion engine is stopped. An idle stop control unit (101) for starting the internal combustion engine (12A) if (12A) is stopped;
  An inclination detecting means (251) for detecting the inclination state of the motorcycle,
  The idle stop control unit (101) determines whether or not the vehicle is off-road traveling based on the inclined state, and does not permit the stop of the internal combustion engine (12A) during off-road traveling. Motorcycle to do. The idle control switch (84) is a switch configured to have the same operation when stopping / permitting idling of the internal combustion engine (12A),
  The idle stop control unit (101) determines an operating state of the internal combustion engine (12A) for each operation, and stops the internal combustion engine (12A) if the internal combustion engine (12A) is operating, The motorcycle according to claim 1, wherein the internal combustion engine (12A) is started if the internal combustion engine (12A) is stopped. The idle stop control unit (101) detects the rotational speed of the internal combustion engine (12A) when the operating element (84S) is operated, and enters an idling stop mode when a rotational speed exceeding zero is detected. The idling stop is permitted when the rotational speed is less than or equal to a predetermined rotational speed (Ne1), and when the rotational speed is zero, the restart mode is entered, and the starter motor (85) for starting the internal combustion engine (12A) is driven to The motorcycle according to claim 2, wherein the starter motor (85) is automatically stopped when it is determined that the start has been completed when the rotational speed (Ne2) of the motor reaches or exceeds. The idle control switch (84) is a seesaw switch in which the single operator (84S) swings or a slide switch in which the single operator (84S) slides.
  The idle stop control unit (101) stops the internal combustion engine (12A) when the single operation element (84S) is operated to one side and the internal combustion engine (12A) is in operation. The motorcycle according to claim 1 or 4, wherein when operated to the other side, if the internal combustion engine (12A) is stopped, the internal combustion engine (12A) is started. When the single operation element (84S) is operated to one side or the other side, the position is fixed to the operated side, and when the single operation element (84S) is operated The motorcycle according to claim 6, wherein the idle stop control unit (101) performs control according to the operated side after waiting for a predetermined waiting time. The single operating element (84S) is configured to be operated to one side or the other side only while there is an external operating force, and otherwise returns to the return position. The idle stop control unit (101) The motorcycle according to any one of claims 2, 6 and 7, wherein a starter motor (85) for starting the internal combustion engine (12A) is rotationally driven while being operated to the other side. A carburetor (63) provided in the intake system of the internal combustion engine (12A), and a catalyst (69) provided in the exhaust system of the internal combustion engine (12A),
  When stopping the internal combustion engine (12A), the idle stop control unit (101) determines whether the internal combustion engine (12A) is in a no-load state or a low-load state, The motorcycle according to any one of claims 1 to 8, wherein the internal combustion engine (12A) is stopped in a low load state. A throttle opening sensor (127) for detecting the throttle opening, a vehicle speed sensor (124) for detecting the vehicle speed, a fuel injection means (223) for injecting fuel to the internal combustion engine (12A), and the internal combustion engine ( 12A), an ignition means for igniting, and an idle stop condition is determined based on the throttle opening and the vehicle speed, and if the condition is met, the ignition means or the fuel injection means (223) is In a motorcycle including an idle stop control unit (101) that stops the internal combustion engine (12A) by performing stop control,
The idle stop control unit (101) starts the stop control and, after a predetermined time elapses, causes the fuel injection means (223) to inject fuel and supplies the internal combustion engine (12A) with fuel for the next start. ,
The motorcycle according to claim 1, wherein the predetermined time is set based on an average rotational speed of the internal combustion engine (12A) immediately before starting the stop control . The motorcycle according to claim 10, wherein the predetermined time is set to be longer as the average rotational speed is higher. Inclination detecting means (251) for detecting the inclination state of the motorcycle,
  The idle stop control unit (101) determines whether or not the vehicle is off-road traveling based on the inclined state, and does not permit the stop of the internal combustion engine (12A) during off-road traveling. The motorcycle according to any one of claims 1, 2, 4 to 11.

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