JPH06257483A - Automatic start-stop device for engine - Google Patents

Abstract

PURPOSE:To reduce frequency of automatic start/stop so as to eliminate an unnecessary automatic stop and to prevent flat battery by prohibiting the automatic stop of an engine when traveling distance of a vehicle is below the predetermined distance after an automatic start of the engine. CONSTITUTION:An automatic start/stop device 14 of an engine 2 is provided with an automatic start/stop control part 16 (economic run computer). The automatic start/stop control part 16 detects an operating condition of a vehicle and the engine 2 on the basis of an idle signal 8, a vehicle speed signal 10, a water temperature signal 18, and the like, and automatically starts/stops the engine 2 when it determines that automatic start/stop condition is satisfied. In this case, a traveling distance of the vehicle after an automatic start of the engine 2 is detected as one of the automatic start conditions. When the detected traveling distance is below the predetermined distance, an automatic stop of the engine 2 is prohibited. In this way, a frequency of automatic start/ stop is reduced so that an unnecessary automatic stop is eliminated, and exhaustion of a battery 44 is also prevented.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic start / stop system for an engine, and more particularly, it can prevent the automatic stop of the engine when the vehicle is stopped at the time of turning right or left immediately after starting at an intersection.
The present invention relates to an automatic start / stop device for an engine that can reduce the frequency of automatic start / stop and prevent the battery from running down.

[0002]

2. Description of the Related Art Some engines mounted on vehicles are equipped with an automatic start / stop device to reduce fuel consumption due to idling operation when the vehicle is stopped due to waiting for traffic lights, traffic congestion, or the like. The automatic start / stop device automatically stops the engine when the automatic stop condition is satisfied based on the operating states of the vehicle and the engine after the engine mounted on the vehicle is started, and automatically starts the engine when the automatic start condition is satisfied. It is what makes me.

As such an automatic start / stop device for an engine, there is one disclosed in Japanese Patent Application Laid-Open No. 58-28565. The automatic start / stop device disclosed in this publication is
The automatic stop is prohibited for a predetermined time after the automatic start condition is satisfied and the engine is automatically started. As described above, in addition to the above-mentioned publication, Japanese Patent Laid-Open No. Sho 5 (1999) -58242 discloses that automatic stop is prohibited for a predetermined time after the engine is automatically started.
There is one disclosed in Japanese Unexamined Patent Publication No. 8-18558.

As an automatic engine start / stop device, there is one disclosed in Japanese Patent Laid-Open No. 59-7749. The automatic start / stop device disclosed in this publication is
It is determined whether or not at least one of the engine speed, the freewheel speed, and the elapsed time after the restart is started meets a predetermined condition, and the engine is automatically operated until the determination result is matched. It is forbidden to stop.

[0005]

In the conventional automatic start-stop system for an engine, as an automatic stop condition, for example, an eco-run switch for activating and stopping the automatic start-stop system is ON, as shown in FIG. That the electric load due to the lighting of the lamp is not added, the cooling water temperature of the engine is within the predetermined value, the predetermined time has elapsed after the engine was automatically started, and the vehicle speed is below the predetermined value. , The throttle pedal is in a fully closed state and the clutch pedal is not depressed, and the throttle valve is in a fully closed state.

The automatic start-stop system does not automatically stop the engine unless one of these automatic stop conditions is satisfied, and automatically stops the engine when all of these automatic stop conditions are satisfied. As described above, the conventional automatic start / stop device for an engine prohibits the automatic stop of the engine for a predetermined time after the engine is automatically started. This is to prevent frequent engine automatic start / stop due to traffic jams and the like, and to prevent battery exhaustion.

However, in such an automatic start-stop system that prohibits automatic stop for a predetermined time after the engine is automatically started, a predetermined time elapses when the vehicle is stopped at the time of turning left or right immediately after starting an intersection or the like. The engine will be stopped automatically.

For example, when a vehicle turns right at the intersection or the like immediately after starting, waiting for an oncoming vehicle or waiting for the right turn signal to light, there is a disadvantage that the engine is automatically stopped after a predetermined time. Further, when a vehicle is stopped due to waiting for a pedestrian to cross at the time of turning left immediately after starting at an intersection or the like, there is a disadvantage that the engine is automatically stopped after a predetermined time has elapsed.

When the vehicle is stopped and the engine is automatically stopped in such a driving situation, an oncoming vehicle may be interrupted,
When the right turn signal is turned on, or when a pedestrian has crossed the pedestrian, the engine cannot be started and the vehicle cannot start immediately, which causes a problem that the flow of vehicle traffic is delayed.
Therefore, it is desirable that the engine be driven so that the engine can be prevented from automatically stopping and the vehicle can immediately start when the vehicle is stopped at the intersection or the like when turning right or left immediately after starting.

Further, in the conventional automatic start-stop system for prohibiting the automatic stop for a predetermined time after the engine is automatically started, as described above, when the vehicle is stopped due to waiting for an oncoming vehicle immediately after starting at an intersection or the like, Since the engine is automatically stopped after a lapse of a predetermined time, automatic start / stop is repeated, and the original purpose of the automatic start / stop system is to improve the fuel consumption rate. There is an inconvenience that it is economically disadvantageous and there is an inconvenience that the battery exhaustion cannot be prevented.

[0011]

SUMMARY OF THE INVENTION In order to eliminate the above-mentioned inconvenience, the present invention is directed to a case where an automatic stop condition is satisfied based on the operating state of the vehicle and the engine after the engine mounted on the vehicle is started. In the automatic start-stop device for the engine that automatically stops the engine and automatically starts the engine when the automatic start condition is satisfied, the traveling distance of the vehicle after the engine is automatically started by satisfying the automatic start condition is a predetermined distance. When it is less than the above, a control means for controlling the automatic stop of the engine is provided. Further, the present invention automatically stops the engine when the automatic stop condition is satisfied based on the operating states of the vehicle and the engine after starting the engine mounted on the vehicle, and automatically starts the engine when the automatic start condition is satisfied. In the automatic start / stop device for the engine to
Control means for controlling the automatic stop of the engine to be prohibited when a cumulative running time at a speed equal to or higher than the set speed of the vehicle after the automatic start condition is satisfied and the engine is automatically started has not passed a predetermined time. It is characterized by being provided.

[0012]

According to the structure of the present invention, the automatic start-stop device controls the engine when the running distance of the vehicle after the automatic starting condition is satisfied and the engine is automatically started is less than the predetermined distance. Control to prohibit automatic stop.
Further, the automatic start-stop device controls the control unit to start the engine if the accumulated running time at the vehicle speed or higher after the automatic start condition is satisfied and the engine is automatically started has not passed the predetermined time. Control to prohibit automatic stop. As a result, it is possible to prevent the inconvenience that the engine is automatically stopped after a predetermined time elapses as in the conventional case when the vehicle is stopped at the intersection when turning right or left immediately after starting.

[0013]

Embodiments of the present invention will be described in detail below with reference to the drawings.

1 to 3 show an embodiment of the present invention. In FIG. 3, 2 is an engine mounted on a vehicle (not shown), 4 is an injector, and 6 is an engine controller. The engine 2 includes an injector 4. The injector 4 is connected to the engine control unit 6. A throttle sensor 8 for inputting an idle signal, a vehicle speed sensor 10 for inputting a vehicle speed signal, and an ignition coil 12 for causing a spark plug to fire are connected to the engine control unit 6.

The engine control unit 6 outputs a fuel injection pulse to drive the injector 4 in response to signals input from various sensors, and the ignition coil 12 also.
An ignition pulse is output to a spark plug (not shown).

The engine 2 has an automatic start / stop device 14
Is equipped with. The automatic start / stop device 14 is provided with an automatic start / stop control unit 16 which is a control means. The throttle sensor 8, the vehicle speed sensor 10, and the ignition coil 12 are connected to the automatic start / stop control unit 16.

The automatic start / stop control unit 16 includes a water temperature sensor 18 for detecting the cooling water temperature of the engine 2 and a clutch upper switch 20 and a clutch lower switch 22 for detecting the depression state of a clutch pedal (not shown).
The regulator L terminal 24 is connected to the small lamp 26, the radiator fan 28, the heater blower 30, the rear glass defogger 32, the wiper 34, the turn signal 36, and the driver's door switch 38.

Further, the automatic start / stop control unit 16 includes
An injector relay 40 provided between the injector 4 and the engine control unit 6 and a starter relay 46 provided between the starter 42 of the engine 2 and the battery 44 are connected. The battery 44 includes an automatic start / stop device 1
4 operation units 48 are connected. The operation unit 48 is connected to the automatic start / stop control unit 16. The operation unit 48 includes
An eco-run switch 50 for operating / stopping the automatic start / stop device 14, an operation display lamp 52 for displaying the operating state of the automatic start / stop device 14, and an abnormality display lamp 54 for displaying an abnormal state of the automatic start / stop device 14. It is provided.

The automatic start / stop control unit 16 of the automatic start / stop device 14 detects the operating state of the vehicle and the engine 2 by various sensors such as the throttle sensor 8 after the engine 2 mounted on the vehicle (not shown) is started, Based on the outputs of the throttle sensor 8 and the like, the engine 2 is automatically stopped when the automatic stop condition is satisfied, and the engine 2 is automatically started when the automatic start condition is satisfied.

In such a start-up / stop system 14 for the engine 2, as shown in FIG. 1, one of the automatic stop conditions is that the vehicle 2 travels after the engine 2 is automatically started by satisfying the automatic start condition. Is set to be a predetermined distance or more. The automatic start / stop control unit 16 includes
If the running distance of the vehicle after the automatic start condition is satisfied and the engine 2 is automatically started is less than a predetermined distance, the automatic stop of the engine 2 is prohibited.

Next, the operation will be described.

The automatic start / stop control unit 16 of the automatic start / stop device 14 is based on the operating state of the vehicle and the engine 2 after the engine 2 mounted on the vehicle (not shown) is started.
When the automatic stop condition is satisfied, the engine 2 is automatically stopped, and when the automatic start stop condition is satisfied, the engine 2 is automatically started.

The automatic stop condition of the automatic start / stop device 14 is, for example, that the eco-run switch 50 for activating / stopping the automatic start / stop device 14 is ON, that the electric load due to lighting of the lamp is not added. The cooling water temperature of the engine 2 is within a predetermined value, the vehicle speed is less than or equal to a predetermined value, the clutch pedal is not depressed and the foot is released, and the throttle valve is fully closed. It is set and provided, and the traveling distance of the vehicle after the engine 2 is automatically started by satisfying the automatic start condition is set and provided.

As the automatic start condition of the automatic start / stop device 14, for example, when the eco-run switch 50 of the automatic start / stop device 14 is ON, the engine 2 is automatically stopped and the clutch pedal is depressed. Are set, etc.

After the engine 2 is started, the automatic start / stop device 14 is controlled by the automatic start / stop control unit 16 such that the eco-run switch 50 of the automatic start / stop device 14 is ON and an electric load due to lighting of a lamp is added. Is not performed, the temperature of the cooling water of the engine 2 is within a predetermined value, the vehicle speed is below a predetermined value, the clutch pedal is not depressed, and the throttle valve is fully closed. It is determined whether or not the automatic stop condition is satisfied, that is, that the vehicle is in a state and that the traveling distance of the vehicle after the engine 2 is automatically started by satisfying the automatic start condition is equal to or more than a predetermined distance. .

The automatic start / stop device 14 does not automatically stop the engine 2 when any one of the automatic stop conditions is not satisfied in the above determination, and automatically stops the engine 2 when all the automatic stop conditions are satisfied. Stop.

To automatically stop the engine 2, the injector relay 40 is turned off to stop the drive of the injector 4 and the output of the ignition pulse to the ignition coil 14 to stop the ignition plug ignition (not shown). Done by. The traveling distance of the vehicle can be easily calculated by counting the number of pulses of the vehicle speed signal output by the vehicle speed sensor 10.

Further, the automatic start / stop device 14 is automatically stopped by the automatic start / stop control unit 16 when the eco-run switch 50 of the automatic start / stop device 14 is ON after the engine 2 is automatically stopped. That the
It is determined whether the automatic starting conditions such as the clutch pedal being depressed are satisfied.

The automatic start / stop device 14 does not automatically start the engine 2 when any one of the automatic start conditions is not satisfied in the above determination, and automatically starts the engine 2 when all the automatic start conditions are satisfied. To start.

In the automatic start of the engine 2, the starter relay 46 is turned on to drive the starter 42, the injector relay 40 is turned on to drive the injector 4, and the ignition coil 14 outputs an ignition pulse. Do not let the spark plug fly. After the engine 2 is completely exploded by the starter 42 and the start is completed, the starter relay 46 is turned off to stop the starter 42.

After the automatic start of the engine 2, the automatic start stop device 14 determines whether or not the automatic stop condition is satisfied. At this time, the automatic start / stop device 14 is
As one of the automatic stop conditions, it is provided that the traveling distance of the vehicle after the engine 2 is automatically started is set to be a predetermined distance or more.

Therefore, the automatic start / stop device 14 is controlled by the automatic start / stop control unit 16 to satisfy the automatic start condition and automatically start the engine 2 when the traveling distance of the vehicle is less than the predetermined distance. Control to prohibit automatic stop of.

In this way, when the vehicle has traveled less than the predetermined distance after the automatic start condition is satisfied and the engine 2 is automatically started, the automatic stop of the engine 2 is controlled so as to be prohibited. It is possible to prevent the inconvenience that the engine 2 automatically stops after a predetermined time elapses when the vehicle stops when turning right or left immediately after starting.

Therefore, when the vehicle is stopped by waiting for an oncoming vehicle at the time of turning left or right immediately after the start of an intersection, like an automatic start-stop device for prohibiting automatic stop for a predetermined time after the engine 2 is automatically started. Moreover, the engine 2 is not automatically stopped, and the automatic stop of the engine 2 can be prevented. As a result, when the oncoming vehicle is interrupted, the right turn signal is lit, or when the pedestrian's crossing is completed, the engine 2 is driven, so that the vehicle can start immediately, and the flow of vehicle traffic. Will not be delayed. Further, since the engine 2 can be prevented from being automatically stopped when the vehicle is stopped when turning right or left immediately after starting the intersection, the frequency of automatic start / stop can be reduced and the battery 44 can be prevented from running up.

Further, since it can be dealt with only by changing the program in the automatic start / stop control unit 16, the structure is not complicated, the manufacture is easy, the cost can be reduced, and it is economical. It is advantageous.

FIG. 2 shows a second embodiment of the present invention.

The automatic start / stop device 14 of the second embodiment.
Has the configuration shown in FIG. 3 as in the first embodiment. That is, the engine 2 mounted on the vehicle (not shown)
Includes an injector 4 and is controlled by the engine control unit 6. A throttle sensor 8, a vehicle speed sensor 10 and an ignition coil 12 are connected to the engine control unit 6.

The automatic start / stop device 14 is provided with an automatic start / stop control unit 16 as a control means. The throttle sensor 8, the vehicle speed sensor 10, and the ignition coil 12 are connected to the automatic start / stop control unit 16.

Further, the water temperature sensor 18, the clutch upper switch 20, the clutch lower switch 22 and the regulator L terminal 24 are connected to the automatic start / stop control unit 16, and the small lamp 26, the radiator fan 28 and the heater blower 30 are connected. The rear glass defogger 32, the wiper 34, the turn signal 36, and the driver's door switch 38 are connected.

Further, the automatic start / stop control unit 16 includes
The injector relay 40 between the injector 4 and the engine controller 6 is connected to the starter 42 of the engine 2 and the starter relay 46 between the battery 44. The operation unit 48 interposed between the battery 44 and the automatic start / stop device 14 is provided with an eco-run switch 50, an operation display lamp 52, and an abnormality display lamp 54.

The automatic start / stop control unit 16 of the automatic start / stop device 14 detects the operating state of the vehicle and the engine 2 by various sensors such as the throttle sensor 8 after the engine 2 mounted on the vehicle (not shown) is started. Based on the outputs of the throttle sensor 8 and the like, the engine 2 is automatically stopped when the automatic stop condition is satisfied, and the engine 2 is automatically started when the automatic start condition is satisfied.

In such a start / stop system 14 for the engine 2, as shown in FIG. 2, one of the automatic stop conditions is the set speed of the vehicle after the engine 2 is automatically started by satisfying the automatic start condition. It is set by setting that the cumulative running time is a predetermined time or more. The automatic start / stop control unit 16 automatically stops the engine 2 if the accumulated running time at the vehicle speed or more after the automatic start condition is satisfied and the engine 2 is automatically started has not passed the predetermined time. Is controlled to prohibit.

Next, the operation will be described.

The automatic start / stop control unit 16 of the automatic start / stop device 14 is based on the operating state of the vehicle and the engine 2 after the engine 2 mounted on the vehicle (not shown) is started.
When the automatic stop condition is satisfied, the engine 2 is automatically stopped, and when the automatic start stop condition is satisfied, the engine 2 is automatically started.

The automatic stop condition of the automatic start / stop device 14 is, for example, that the eco-run switch 50 for activating / stopping the automatic start / stop device 14 is ON, that the electric load due to lighting of a lamp is not added, The cooling water temperature of the engine 2 is within a predetermined value, the vehicle speed is less than or equal to a predetermined value, the clutch pedal is not depressed and the foot is released, and the throttle valve is fully closed. And setting that the accumulated running time at the vehicle set speed or more after the engine 2 is automatically started by satisfying the automatic start condition has passed a predetermined time. It is provided.

As the automatic start condition of the automatic start / stop device 14, for example, when the eco-run switch 50 of the automatic start / stop device 16 is ON, the engine 2 is automatically stopped, and the clutch pedal is depressed. Are set, etc.

The automatic start / stop device 14 is controlled by the automatic start / stop control unit 16 so that after the engine 2 is started, the eco-run switch 50 of the automatic start / stop device 14 is ON, and an electric load due to lighting of a lamp is added. Is not performed, the temperature of the cooling water of the engine 2 is within a predetermined value, the vehicle speed is below a predetermined value, the clutch pedal is not depressed, and the throttle valve is fully closed. State, and that the accumulated running time at a speed equal to or higher than the set speed of the vehicle after the automatic start condition is satisfied and the engine 2 is automatically started exceeds a predetermined time. Determine whether you are satisfied.

The automatic start / stop device 14 does not automatically stop the engine 2 when any one of the automatic stop conditions is not satisfied in the above determination, and automatically stops the engine 2 when all the automatic stop conditions are satisfied. Stop.

To automatically stop the engine 2, the injector relay 40 is turned off to stop the drive of the injector 4 and the output of the ignition pulse to the ignition coil 14 is stopped to stop the spark plug ignition (not shown). Done by. The cumulative running time of the vehicle at the set speed or higher is calculated by counting and calculating the number of pulses of the vehicle speed signal output from the vehicle speed sensor 10.
It can be calculated easily.

Further, the automatic start / stop device 14 is automatically stopped by the automatic start / stop control unit 16 when the eco-run switch 50 of the automatic start / stop device 14 is ON after the engine 2 is automatically stopped. That the
It is determined whether the automatic starting conditions such as the clutch pedal being depressed are satisfied.

The automatic start / stop device 14 does not automatically start the engine 2 when one of the automatic start conditions is not satisfied in the above determination, and automatically starts the engine 2 when all the automatic start conditions are satisfied. To start.

In the automatic start of the engine 2, the starter relay 46 is turned on to drive the starter 42, while the injector relay 40 is turned on to drive the injector 4 and the ignition coil 14 outputs an ignition pulse. Do not let the spark plug fly. After the engine 2 is completely exploded by the starter 42 and the start is completed, the starter relay 46 is turned off to stop the starter 42.

After the automatic start of the engine 2, the automatic start / stop device 14 determines whether or not the automatic stop condition is satisfied. At this time, the automatic start / stop device 14 is
As one of the automatic stop conditions, it is set by setting that a predetermined cumulative time has elapsed after the engine 2 is automatically started and the vehicle travels at a set speed or higher.

Therefore, the automatic start / stop device 14 is controlled by the automatic start / stop control unit 14 after the automatic start condition is satisfied and the engine 2 is automatically started. If is not elapsed, control is performed to prohibit the automatic stop of the engine 2.

In this way, if the accumulated running time at the vehicle speed or more after the automatic start condition is satisfied and the engine 2 is automatically started has not passed the predetermined time, the automatic stop of the engine 2 is prohibited. By controlling as much as possible, it is possible to prevent the inconvenience that the engine 2 automatically stops after a predetermined time elapses as in the conventional case when the vehicle is stopped at the intersection when turning right or left immediately after starting.

Therefore, when the vehicle is stopped due to waiting for an oncoming vehicle at the time of turning left or right immediately after the start of an intersection, like an automatic start-stop device for prohibiting automatic stop for a predetermined time after the engine 2 is automatically started. Moreover, the engine 2 is not automatically stopped, and the automatic stop of the engine 2 can be prevented. As a result, when the oncoming vehicle is interrupted, the right turn signal is lit, or when the pedestrian crossing is completed, the engine 2 is driven, so that the vehicle can start immediately and the flow of vehicle traffic. Will not be delayed. Further, since the engine 2 can be prevented from being automatically stopped when the vehicle is stopped at the time of turning right or left immediately after starting the intersection, the frequency of automatic start / stop can be reduced, and the battery 46 can be prevented from running out.

Further, since it can be dealt with only by changing the program in the automatic start / stop control unit 16, the structure does not become complicated, the manufacture is easy, the cost can be made low, and it is economical. It is advantageous.

[0058]

As described above, according to the present invention, as in the conventional automatic start / stop device for prohibiting the automatic stop for a predetermined time after the engine is automatically started, the engine is opposed at the time of right / left turn immediately after the start of the intersection. It is possible to prevent the engine from being automatically stopped when the vehicle is stopped due to waiting for a vehicle or the like and the engine is not automatically stopped. As a result, when the oncoming vehicle is interrupted, the right turn signal is lit, or when the pedestrian's crossing is completed, it is possible to start immediately because the engine is driven, and the flow of vehicle traffic can be changed. There is no delay. In addition, since the engine can be prevented from being automatically stopped when the vehicle is stopped at the time of turning left or right immediately after starting the intersection, the frequency of automatic start / stop can be reduced and the battery can be prevented from running out.
Further, since it can be dealt with only by changing the program in the control means, the structure is not complicated, the manufacturing is easy, the cost can be reduced, and it is economically advantageous.

[Brief description of drawings]

FIG. 1 is an explanatory diagram of automatic stop conditions of an automatic start-stop system according to an embodiment of the present invention.

FIG. 2 is an explanatory diagram of automatic stop conditions of an automatic start-stop system according to another embodiment of the present invention.

FIG. 3 is a schematic configuration diagram of an automatic start / stop device.

FIG. 4 is an explanatory diagram of automatic stop conditions of an automatic start-stop system according to a conventional example of the present invention.

[Explanation of symbols]

 2 engine 4 injector 6 engine control unit 8 throttle sensor 10 vehicle speed sensor 12 ignition coil 14 automatic start / stop device 16 automatic start / stop control unit 18 water temperature sensor 20 clutch upper switch 22 clutch lower switch 24 regulator L terminal 26 small lamp 28 radiator Fan 30 Heater blower 32 Rear defogger 34 Wiper 36 Turn signal 38 Driver's door switch 40 Injector relay 42 Starter 44 Battery 46 Starter relay 48 Operating part 50 Eco-run switch 52 Operation indicator lamp 54 Abnormality indicator lamp

Claims (2)

[Claims] 1. After the engine mounted on the vehicle is started, the engine is automatically stopped when the automatic stop condition is satisfied based on the operating states of the vehicle and the engine, and the engine is automatically started when the automatic start condition is satisfied. In an automatic start / stop device for an engine, a control means is provided for controlling the automatic stop of the engine when the travel distance of the vehicle after the automatic start condition is satisfied and the engine is automatically started is less than a predetermined distance. An automatic start / stop device for an engine, which is characterized in that 2. After the engine mounted on the vehicle is started, the engine is automatically stopped when the automatic stop condition is satisfied based on the operating states of the vehicle and the engine, and the engine is automatically started when the automatic start condition is satisfied. In the automatic start / stop device for an engine, if the accumulated running time at a speed equal to or higher than the set speed of the vehicle after the automatic start condition is satisfied and the engine is automatically started does not exceed the predetermined time, the engine is automatically stopped. An automatic start / stop device for an engine, which is provided with control means for controlling to prohibit.