JP3111720B2 - Start / stop device for vehicles - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a start / stop device for a vehicle, and more particularly to an operation for stopping an engine when a vehicle is stopped and in a predetermined driving state, and for restarting the engine by depressing a clutch. The present invention relates to a vehicle start / stop device.

[0002]

2. Description of the Related Art Some vehicles employ a vehicle start / stop device that can stop the engine when unnecessary stoppage and easily restart the engine by depressing a clutch.

The vehicle start / stop system automatically stops the engine when the stop time is relatively long, such as during a traffic jam or when waiting for a traffic light, that is, at an unnecessary stop, thereby improving fuel efficiency.

[0004] An example of the vehicle start / stop device is disclosed in Japanese Patent Application Laid-Open No. 63-75323. The automatic stop / start device for a vehicle disclosed in this publication detects and detects the stop-rotation and idle-off idle of the engine, and drives the starter motor when the ignition switch is in the ignition position and turned off when the engine is stopped. A starter motor energization control circuit, a traveling detector for discriminating and detecting whether the vehicle has stopped or traveling, a stop circuit controller for maintaining an inoperative state when the vehicle is traveling by an electric signal from the traveling detector, and a stop circuit controller. A delay circuit that issues a stop signal after a lapse of a predetermined time when activated by stopping the vehicle; a stop signal controller that allows the delay circuit to generate a stop signal when the clutch of the engine power transmission device is disengaged or the transmission is set to a neutral position. , An engine stop circuit that stops the engine with a stop signal, and a headlight off that turns off the headlight with a stop signal And a road.

[0005] Further, there is one disclosed in Japanese Utility Model Publication No. 24655/1995. An automatic start and stop device for an engine disclosed in this publication includes an automatic transmission using a torque converter, a shift lever that selects a drive position and a neutral position of the automatic transmission and switches the shift position, and a starter that starts the engine. A starter control device that controls the energization of the vehicle, an ignition control device that controls the energization of an ignition ignition circuit, a vehicle speed detection unit that detects the vehicle speed of the vehicle, and a case where the vehicle speed detection unit detects zero vehicle speed after starting the engine. When the ignition control device is activated to stop the engine. In both cases, stop control means for shifting the shift lever to the neutral position after the engine stops, and ignition by the operation of the ignition control device when the shift lever is shifted to the drive position and the accelerator is not depressed after the stop of the engine by the stop control means. And a restart control means for energizing the ignition circuit and energizing the starter by operation of the starter control device.

[0006]

In a conventional vehicle start / stop device, when the clutch is released, the engine speed is idle, and no electric load is applied, the engine is stopped and the clutch is stopped. There is one that is restarted by the depressing operation of.

Further, when restarting is performed by depressing the clutch, control is performed to prohibit automatic stop of the engine for a certain period of time.

As a result, in the case of a system in which the automatic stop of the engine is prohibited for a certain period of time, the time from the stop to the restart of the engine is short, and the state may frequently occur. The fuel consumption, which is the original purpose, cannot be improved, and there is a disadvantage that it is economically disadvantageous, and the durability of the starter and the driving feeling are deteriorated, which is disadvantageous in practical use.

[0009]

Therefore, in order to eliminate the above-mentioned inconvenience, the present invention operates to stop the engine in a predetermined driving state when the vehicle is stopped, and operates the engine by depressing the clutch. In a vehicle start / stop device that restarts and prohibits an automatic stop operation of an engine immediately after restart for a predetermined time, the number of times the engine has stopped within a predetermined time is measured, and the measured number of engine stops is a predetermined number of times. Until the time until the automatic stop of the engine is not changed, if the measured number of stops of the engine exceeds the predetermined number of times, the engine uses the delay time set data corresponding to the number of stops to set the engine. A control means for controlling the time until the automatic stop is provided.

[0010]

According to the invention described above, when the control means is operated, the number of times the engine has stopped within a predetermined time is measured. Without changing
If the measured number of engine stops exceeds a predetermined number, the engine is operated by delaying the time until the automatic stop of the engine by setting data of the delay time set according to the number of stops. If the time is short, the charging time for the next operation can be lengthened, an appropriate charging time can be secured, and the protection of the battery and the starter is reliably achieved, which is practically advantageous. In addition, in the case of congestion or the like where the vehicle repeatedly stops and starts in a short time, it is possible to avoid stopping the engine and maintain good fuel economy, which is economically advantageous. Yes, and it can be dealt with only by changing the program in the control means, so that the structure is not complicated, the production is easy, the cost can be reduced, and it is economically advantageous. .

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below in detail with reference to the drawings.

1 to 5 show an embodiment of the present invention. In FIG. 3, reference numeral 2 denotes a vehicle start / stop device, and reference numeral 4 denotes control means.

An input side of the control means 4 of the vehicle start / stop device 2 has an engine rotation detecting means 6 for detecting a state of the engine (not shown) and outputting a signal, and a vehicle speed for outputting a signal corresponding to the actual vehicle speed. A sensor 8, a clutch switch 10 for detecting a depression operation of a clutch pedal (not shown) serving as a switch at the time of restart to confirm the driver's intention to start and stop, and to determine operation, stop, and cancel of this system. The ERS switch 12 is connected to an electric load detection unit 14 for turning on an air conditioner (A / C) (not shown) or turning on a headlight (not shown).

The output side of the control means 4 is connected to a start relay 16 for rotating the starter and a stop relay 18 for cutting off the main power supply and stopping the engine.

The control means 4 operates to stop the engine when the vehicle is in a predetermined driving state when the vehicle is stopped, and restarts the engine by depressing the clutch. It has a function to prohibit the stop operation for a predetermined time, and the above function measures the number of times the engine has stopped within the predetermined time and calculates the time until the automatic stop of the engine according to the measured number of stops of the engine. , For example, a function of adding a control function for canceling the automatic stop and delaying the time until the automatic stop of the engine is added.

More specifically, the control means 4 includes various kinds of detection signals from the engine rotation detection means 6 on the input side for detecting the driving state, the vehicle speed sensor 8, the clutch switch 10, the ERS switch 12, and the electric load detection means 14. , Respectively,
Based on the various detection signals and the number of times the engine has been stopped measured within a predetermined time, it is determined whether the next automatic stop is to be performed or canceled, and a control signal is output to the start relay 16 or the stop relay 18 on the output side. .

Next, the operation will be described with reference to the control flowchart of FIG.

When an unillustrated ignition (IG) of the engine is turned on, the control means 4 operates and a control program is started.

Then, it is determined whether or not the ERS switch 12 is ON (100). If this determination (100) is NO, that is, if the ERS switch 12 is OFF,
Start relay 16 and stop relay 18 are each OF
F (138), return to the judgment (100), and judge (10
If (0) is YES, that is, if the ERS switch 12 is turned ON, the process proceeds to the determination (102) as to whether or not the start relay 16 is ON.

If the judgment (102) is YES,
The process proceeds to a determination (132) as to whether or not the engine speed is 500 rpm or more, which will be described later.
In the case of (1), it is determined whether or not a vehicle speed sensor error has occurred (104).
I do.

It is determined whether or not this vehicle speed sensor error has occurred (10).
4) is a prohibition condition during the failure of the vehicle speed sensor. If the determination (104) is NO, the electric load becomes O.
A determination is made as to whether or not N is satisfied (106).
If 4) is YES, a stop relay 18 described later is used.
To OFF (124).

The judgment (106) as to whether or not the electric load is ON includes the judgment (10) as to whether or not a vehicle speed sensor error has occurred.
Similar to 4), the prohibition condition is set when there is an electric load input. If the determination (106) is NO, that is, if the prohibition condition is not satisfied, it is determined whether or not it is immediately after the start ( 108), and if this determination (108) is NO, it is determined whether or not the stop relay 18 is ON (1).
10) is performed, and if the determination (108) is YES, the process is shifted to OFF (124) of the stop relay 18 described later.

If the determination (110) of whether or not the stop relay 18 is ON is YES, it is determined whether or not an ignition (IG) non-input state described later has passed, for example, 0.2 seconds. The process proceeds to the judgment (122), and the judgment (1)
If 10) is NO, it is determined (112) whether or not the vehicle speed is not input for one second.

If the determination (112) as to whether or not the vehicle speed is in the non-input state for one second is NO, it is determined whether or not the non-input state of the ignition (IG) described later has passed, for example, 0.5 seconds. (126), and the determination (11)
If 2) is YES, the clutch switch 10 is turned off.
A determination is made as to whether it is F (114).

Here, it is determined whether the vehicle speed has not been input for one second (112) or the clutch switch 10 is turned off.
(114) is for determining whether or not the driver intends to stop and start the vehicle.

If the above determination (114) is NO,
Similarly to the determination (112), the non-input state of the ignition (IG) described later is shifted to a determination (126) as to whether or not, for example, 0.5 seconds has elapsed.
In the case of ES, 1 is added to the number of stops (116),
Thereafter, it is determined whether or not the prohibition flag is 0 (118).
I do.

If the judgment (118) is NO, the non-input state of the ignition (IG) to be described later is shifted to a judgment (126) as to whether or not, for example, 0.5 seconds has elapsed, and the judgment (118) If the answer is YES, the stop relay 18 is turned on (120) to stop the engine. That is, the above determinations (112), (114), (1)
If 18) is NO, that is, if the condition is not satisfied, the process shifts to determine ON (restart) of the start relay 16.

After the stop relay 18 is turned on (120), it is determined whether or not the ignition (IG) has not been input for 0.2 seconds, for example (122).
If the determination (122) is NO, that is, if the stop of the engine is not completed, the process returns to the determination (100) of whether or not the ERS switch 12 is ON, and the determination (12)
If 2) is YES, that is, if it is determined that the engine has been completely stopped, the stop relay 18 is turned off (124). In this state, the stop relay 18 is turned on until the state becomes the no-input state.

Further, in order to determine whether or not to restart, the non-input state of the ignition (IG) is set to, for example, 0.
A determination is made as to whether five seconds have elapsed (126) and a determination whether the clutch switch 10 is ON (128). If these determinations (126) and (128) are NO, the It is considered that there is no intention to start, and the process returns to the determination (100) of whether or not the ERS switch 12 is ON. If each of the determinations (126) and (128) is YES,
It is determined that there is a will to restart, and the start relay 16
Is turned on (130), and restart is started.

Next, in order to determine whether or not the restart has been completed, it is determined whether or not the engine speed is 500 rpm or more (132) and whether or not the clutch switch 10 has been turned on for 0.1 second. A judgment (134) is made. If the judgment (132) is NO, the clutch switch 10
Is turned on for 0.1 second (134), and if the judgment (132) is YES, the start relay 16 is turned off (136).

If the determination (134) is YES, it is determined whether or not the ERS switch 12 is ON (1).
Returning to (00), if the determination (134) is NO, the process proceeds to the OFF operation (136) of the start relay 16.
That is, when the determination (132) as to whether the engine speed is 500 rpm or more is NO and the determination (134) as to whether the clutch switch 10 is turned on for 0.1 second is NO, the restart is completed. And start relay 1
6 is turned off. And ERS switch 1
The process returns to the determination (100) of whether or not 2 is ON.

As described above, the automatic stop and restart of the engine are performed. Next, the interrupt flowchart of FIG. 2 will be described.

When an interrupt operation occurs at regular intervals (200), the prohibition flag is set / cleared according to the state of the prohibition flag. That is, it is determined whether the prohibition flag is 1 or not (202). If the determination (202) is NO, it is determined that the prohibition flag is not set, and the number of stops counted in the main routine is determined. Is determined whether or not is equal to or greater than a first set value (COUNT1) set in advance (204).

If the judgment (204) is YES,
The prohibition flag is set to 1 (206), the number of stops is cleared (208), and the process shifts to RTI (210). If the judgment (204) is NO, the number of stops is cleared (208) and the next interrupt is executed. Is initialized, and the process proceeds to the RTI (210).

If the determination (202) is YES, that is, if the prohibition flag is set, the number of stops is set to the second set value (COU) set in advance.
NT2) is determined (212) to determine whether the value is smaller than
If the determination is YES, the prohibition flag is cleared to 0, and the process proceeds to step (208). If the determination (212) is NO, the direct processing (20)
8).

Here, the process (116) of adding the number of stops before checking the prohibition flag is performed.
The former number of stops is the number of actual stops, while the latter number of stops is the number of times that the stop condition is satisfied.

Thus, the number of times the engine is stopped within a predetermined time can be measured, and the measured data can be used to determine whether to execute or cancel the automatic stop immediately after the next restart. If it ’s short,
By releasing the automatic stop of the engine, the charging time for the next operation can be lengthened, an appropriate charging time can be secured, and the protection of the battery and the starter can be reliably achieved, which is practically advantageous. .

Further, in a traffic jam or the like in which the vehicle repeatedly stops and starts in a short time, the engine can be prevented from being stopped, and the fuel efficiency can be maintained in a good state. It is advantageous.

Furthermore, since it can be dealt with only by changing the program in the control means 4, the structure is not complicated, the manufacturing is easy, the cost can be reduced, and the cost is advantageous. .

It should be noted that the present invention is not limited to the above-described embodiment, and various applications and modifications are possible.

For example, the start / stop device of the present invention is also used for an engine mounted on a vehicle that employs an electronic fuel injection system and that stops only the engine by stopping fuel injection pulses. It is possible.

Further, in the embodiment of the present invention, an interrupt flowchart for judging the execution and cancellation of the next automatic stop based on the number of stops is used, and the engine is stopped according to the number of stops of the engine measured within a predetermined time. The control is performed to change the time until the automatic stop. However, in order to delay the time until the next automatic stop of the engine, an interrupt flowchart shown in FIG. It is also possible to control to change the time until the automatic stop of the engine according to the number of stops.

If an interrupt operation occurs (300), it is determined whether or not a delay is in progress (30).
2) is performed, and if this determination (302) is NO, a determination is made (312) as to whether or not a time to count the number of times described later has elapsed. The delay time of the determination (302) is
As shown in FIG. 5, it is set according to the number of times the engine is stopped.

If the determination (302) is YES, the number of engine stops is increased to the second set value (COUN).
T2) is determined (304), and if the determination (304) is YES, the prohibition flag is set to 0 (306), and the process proceeds to the determination (312) described later.

If the judgment (304) is NO, it is judged (308) whether or not a predetermined delay time as a delay time has elapsed. If this determination (308) is NO, the process moves to the determination (312) described later, and the determination (308).
Is YES, the prohibition flag is set to 0 (310),
It is determined (312) whether or not the count time has elapsed. If this determination (312) is NO, the RTI (312)
Move to 20).

If the judgment (312) is YES,
It is determined whether the number of stops (stops) is equal to or greater than the first set value (COUNT1) (314), and this determination (3)
If NO in step 14), the process proceeds to step 318 for clearing the number of stops, and the determination in step 314 is YES.
In the case of (1), as shown in FIG. 5, the delay (delay) time is set by the delay time setting data corresponding to the number of stops, and the prohibition flag is set to 1 (31).
After 6), the number of stops is cleared (318), and R
The process has moved to TI (320).

Thus, similarly to the above-described embodiment, the number of times the engine is stopped within a predetermined time can be measured, and the measured data can be set to delay the time until the next automatic stop. If the operating time is short, the charging time for the next operation can be extended by delaying the time until the next automatic stop, and an appropriate charging time can be secured. Can be surely achieved, which is practically advantageous.

Similarly to the above-described embodiment, in the case of a traffic jam or the like in which the vehicle repeatedly stops and starts in a short time, it is necessary to delay the time until the next automatic stop to stop the engine. It can be avoided and fuel economy can be maintained in good condition, which is economically advantageous.

Further, similarly to the above-described embodiment, since it can be dealt with only by changing the program in the control means, the structure is not complicated and the manufacture is easy.
The cost can be reduced, which is economically advantageous.

[0050]

As described above in detail, according to the present invention, the number of times the engine has been stopped within a predetermined time is measured, and the number of times the engine has been stopped is not more than the predetermined number of times until the engine is automatically stopped. If the measured number of stoppages of the engine exceeds a predetermined number without changing the control, control is performed to delay the time until the automatic stoppage of the engine by setting data of the delay time set corresponding to the number of stoppages. By providing the control means, if the operating time of the engine is short, the charging time for the next operation can be lengthened, so that an appropriate charging time can be secured and the protection of the battery and the starter can be ensured. The engine can be stopped in a traffic jam where the vehicle repeatedly stops and starts in a short period of time. And obtained and maintained in good condition, it is economically advantageous. Further, since the problem can be dealt with only by changing the program in the control means, the structure is not complicated, the production is easy, the cost can be reduced, and the present invention is economically advantageous.

[Brief description of the drawings]

FIG. 1 is a control flowchart of a vehicle start / stop device according to an embodiment of the present invention.

FIG. 2 is a flowchart for interruption of a vehicle start / stop device.

FIG. 3 is a block diagram of a vehicle start / stop device.

FIG. 4 is a flowchart for interrupting a vehicle start / stop device showing another embodiment of the present invention.

FIG. 5 is a diagram showing setting data in relation to the number of stops and the delay time.

[Explanation of symbols]

 2 Vehicle start / stop device 4 Control means 6 Engine rotation detecting means 8 Vehicle speed sensor 10 Clutch switch 12 ERS switch 14 Electric load detecting means 16 Start relay 18 Stop relay

Claims (1)

(57) [Claims] When the vehicle is stopped, the engine is operated in a predetermined driving state to stop the engine, the engine is restarted by depressing a clutch, and the automatic stop operation of the engine immediately after the restart is prohibited for a predetermined time. in starting and stopping device for a vehicle which measures the number of times the stopped engine within a predetermined time, number of stops the measured engine
Changes the time until the engine stops automatically up to the specified number of times
Without stopping the measured number of engine stops
If the number of stops exceeds the specified number, the
A start / stop device for a vehicle, further comprising control means for delaying the time until the automatic stop of the engine based on the set data of the set delay time .