JP5929064B2 - Vehicle control device - Google Patents

Description

  The present invention relates to a vehicle control apparatus that automatically stops and restarts an internal combustion engine during operation.

2. Description of the Related Art Conventionally, there has been provided a vehicle control device that improves fuel efficiency and exhaust gas emission by automatically stopping an internal combustion engine when an automatic stop condition is satisfied when the vehicle is stopped during operation of the internal combustion engine.
By the way, when the automatic stop of the internal combustion engine is performed when the vehicle stops with the lamps such as the vehicle headlight or the vehicle width light turned on, the charging operation to the battery by the alternator is performed when the automatic stop period becomes longer Since the battery is stopped, there is a concern that the charging capacity of the battery may be reduced early.
Therefore, a technique has been proposed in which when the internal combustion engine is automatically stopped with the lamp lit, the lamp is dimmed or extinguished according to the charge capacity of the battery (Patent Document 1). reference).
On the other hand, when it is determined that the brake depression amount is larger than a predetermined value during deceleration of the vehicle, a technology has been proposed to further improve fuel consumption and exhaust gas emission by automatically stopping the internal combustion engine. (See Patent Document 2).
In this apparatus, when the automatic restart condition is satisfied at the time point when the vehicle speed reaches zero after the automatic stop of the internal combustion engine during deceleration, the internal combustion engine that has been stopped is restarted. In this case, examples of the automatic restart condition include a decrease in the amount of depression of the brake pedal by the driver or an operation of the accelerator pedal.

JP 2001-10405 A JP 2002-221959 A

However, when the former technique is applied to the latter technique, there are concerns about the following disadvantages.
That is, when automatic restart of the internal combustion engine is performed at a time point after the automatic stop of the internal combustion engine is performed during deceleration while the vehicle lamp is lit and before the vehicle speed reaches zero, When the (starter motor) operates, the output voltage of the battery temporarily decreases and the lamp is dimmed.
If such lamp dimming occurs while the vehicle is running, it can be considered that the driver feels uncomfortable.
The present invention has been made in view of such circumstances, and is intended to suppress the driver from feeling uncomfortable with the operation of the lamp at the time of automatic restart after the internal combustion engine is automatically stopped during deceleration of the vehicle. An object is to provide an advantageous vehicle control device.

In order to achieve the above-described object, a vehicle control apparatus according to the present invention includes a deceleration detection unit that detects a deceleration state of a vehicle, a deceleration state of the vehicle detected by the deceleration detection unit, and a stop condition during deceleration. An automatic stop control device for decelerating for executing an automatic stop process of the internal combustion engine when established, a stop detection device for detecting a stop state of the vehicle, a stop state of the vehicle is detected by the stop detection device, and An automatic stop control means for executing an automatic stop process of the internal combustion engine when it is determined that a stop condition during the stop is satisfied; and a restart condition when the restart condition is satisfied during the automatic stop of the internal combustion engine. The automatic restart control means for performing the automatic restart process, the lamp state detection means for detecting the lighting state of the lamp of the vehicle, and the automatic stop process and the automatic restart process are prohibited. A vehicle control apparatus and a prohibiting means for, said inhibiting means, when the lighting of the lamp by the lamp status detection means is detected, the implementation of the automatic stopping process by the reduction during the automatic stop control means The automatic stop control means during stopping is configured to perform the automatic stop processing when it is determined that the stop condition during stop is satisfied regardless of the lighting state of the lamp .

According to the first aspect of the present invention, when the lighting of the lamp is detected, the execution of the automatic stop process is prohibited, so that the lamp is dimmed at the time of automatic restart after the automatic stop of the internal combustion engine. This is advantageous in preventing the operation of the lamp from causing the driver to feel uncomfortable.
Moreover, since the automatic stop during the stop can be performed regardless of the lighting state of the lamp, the frequency of the automatic stop during the stop is not unnecessarily limited, which is advantageous in improving the fuel consumption.
According to the second aspect of the present invention, if restarting is performed while the lamp is lit, the lamp is dimmed along with the restarting as described above, which may give the driver a sense of incongruity. Therefore, if automatic restart processing is performed preferentially in synchronization with the lamp being switched from extinguished to lit, a slight delay occurs until the lamp is completely lit, but the delay is operated. There is almost no sense of discomfort. For this reason, it is possible to further suppress the operation of the lamp from causing the driver to feel uncomfortable.
According to the third aspect of the present invention, restarting is not performed even if the lamp is switched to the lighting state during the automatic stop while the vehicle is stopped, which is more advantageous in improving fuel consumption.
According to the fourth aspect of the present invention, even if the lamp is frequently turned on and off in a low speed state, the frequency of automatic stop and automatic restart of the internal combustion engine can be suppressed, fuel consumption can be suppressed, and the starter This is advantageous for extending the service life.

It is a block diagram which shows the structure of the vehicle control apparatus which concerns on embodiment of this invention. It is a 1st flowchart which shows operation | movement of the vehicle control apparatus which concerns on embodiment of this invention. It is a 2nd flowchart which shows operation | movement of the vehicle control apparatus which concerns on embodiment of this invention. It is a 3rd flowchart which shows operation | movement of the vehicle control apparatus which concerns on embodiment of this invention. It is a 4th flowchart which shows operation | movement of the vehicle control apparatus which concerns on embodiment of this invention. It is a 5th flowchart which shows operation | movement of the vehicle control apparatus which concerns on embodiment of this invention. It is a 6th flowchart which shows operation | movement of the vehicle control apparatus which concerns on embodiment of this invention. It is a 7th flowchart which shows operation | movement of the vehicle control apparatus which concerns on embodiment of this invention. It is an 8th flowchart which shows operation | movement of the vehicle control apparatus which concerns on embodiment of this invention. It is a 9th flowchart which shows operation | movement of the vehicle control apparatus which concerns on embodiment of this invention. It is a 10th flowchart which shows operation | movement of the vehicle control apparatus which concerns on embodiment of this invention.

FIG. 1 is a block diagram showing a configuration of a vehicle control device 2 according to an embodiment of the present invention.
The vehicle includes an engine 10 as an internal combustion engine, a fuel injection control means 12, an ignition control means 14, a starter 16, a battery 18, a battery ECU 20, a lamp 40, various sensors described later, An ECU 22 that receives a detection signal supplied from the sensor and controls each part including the engine 10 is mounted.
In the present embodiment, the vehicle control device 2 includes an ECU 22.

The engine 10 drives a drive wheel, and is comprised with the gasoline engine 10 in this Embodiment. A diesel engine may be used as the engine 10.
The fuel injection control means 12 controls the supply of fuel to the engine 10 and is controlled by the ECU 22.
The ignition control unit 14 performs ignition control of the engine 10 and is controlled by the ECU 22.
In the present embodiment, the fuel supply is stopped by the fuel injection control means 12, or the ignition is stopped by the ignition control means 14, so that the engine 10 during operation is automatically stopped.

  The starter 16 starts the engine 10, and includes a DC / DC converter that boosts the voltage supplied from the battery 18, and a starter that cranks the engine 10 using the voltage supplied from the DC / DC converter. And a motor.

The battery 18 supplies electric power to the starter motor and the auxiliary machines, and is charged by electric power from an alternator driven by the engine 10.
The battery ECU 20 detects the state of the battery 18 and reports the detection result to the ECU 22 via a communication line such as CAN.
Examples of the state of the battery 18 include an internal resistance indicating the deterioration state of the battery 18 and an SOC (State Of Charge) indicating the charge capacity of the battery 18.

The lamp 40 includes a headlamp and a vehicle width lamp provided on the vehicle.
The lamp 40 is turned on by supplying a voltage from the battery 18 when a lamp switch 38, which will be described later, is turned on. When the lamp switch 38 is turned off, the voltage supply from the battery 18 is stopped. Turns off.

As various sensors, an ignition switch 24, a vehicle speed sensor 26, a rotation speed sensor 28, an accelerator sensor 30, a water temperature sensor 34, an air conditioner switch 36, a lamp switch 38, and the like are provided.
The ignition switch 24 is operated to start the engine 10. When the ignition switch 24 is turned on, the starter 16 is operated by the ECU 22 to start the engine 10.
The vehicle speed sensor 26 detects the traveling speed of the vehicle and supplies the detection result to the ECU 22. In the present embodiment, the vehicle speed sensor 26 constitutes speed detecting means for detecting the traveling speed of the vehicle.
The rotation speed sensor 28 detects the rotation speed of the engine 10 and supplies the detection result to the ECU 22.
The accelerator sensor 30 detects the operation amount (accelerator opening) of the accelerator pedal and supplies the detection result to the ECU 22.
The water temperature sensor 34 detects the water temperature of the engine 10 and supplies the detection result to the ECU 22.
The air conditioner switch 36 is for operating on / off of an air conditioner for air conditioning the vehicle interior, and the on / off state is supplied to the ECU 22 as a detection result.
The lamp switch 38 operates to turn on and off the lamp 40 as described above, and the on / off state, that is, the on / off state of the lamp 40 is supplied to the ECU 22 as a detection result. In the present embodiment, the lamp switch 38 constitutes a lamp state detection unit that detects the lighting state of the lamp 40.

The ECU 22 includes a CPU, a ROM that stores and stores a control program, a RAM as an operation area of the control program, an interface unit that interfaces with peripheral circuits and the like.
By executing the control program, the ECU 22 performs a stop detection means 22A, a stop automatic stop control means 22B, a deceleration detection means 22C, a deceleration automatic stop control means 22D, an automatic restart control means 22E, The traveling state detecting means 22F, the prohibiting means 22G, and the forced restarting means 22H are realized.

  The stop detection means 22A detects the stop state of the vehicle. In this embodiment, the stop detection means 22A detects that the vehicle is in a stop state when the detection result of the vehicle speed sensor 26 is zero.

The stop automatic stop control means 22B performs an automatic stop process of the engine 10 when the stop state of the vehicle is detected by the stop detection means 22A and it is determined that the stop condition during stop is satisfied.
As will be described later, the stop condition during the stop is exemplified by the state of the battery 18, the presence or absence of the operation of the air conditioner, the water temperature of the engine 10, the accelerator opening, and the like.

  The deceleration detection means 22C detects the deceleration state of the vehicle. In this embodiment, the deceleration detection means 22C detects whether or not the vehicle is in a deceleration state based on the detection result of the vehicle speed sensor 26.

The automatic stop control means 22D during deceleration performs automatic stop processing of the engine 10 when the deceleration detection means 22C detects the vehicle deceleration state and determines that the deceleration stop condition is satisfied.
Examples of the stop condition during deceleration include the state of the battery 18, the presence / absence of the operation of the air conditioner, the water temperature of the engine 10, the turning on / off of the lamp 40 in addition to the accelerator opening.

The automatic restart control means 22E performs an automatic restart process of the engine 10 when a restart condition is satisfied during the automatic stop of the engine 10 by the automatic stop control means 22B during stoppage or the automatic stop control means 22D during deceleration. .
The restart conditions during the automatic stop by the automatic stop control means 22B during stop and the automatic stop control means 22D during deceleration include the state of the battery 18, the presence / absence of the air conditioner operation, the water temperature of the engine 10, the accelerator opening, etc. Illustrated.

  The traveling state detection means 22F detects the traveling state and the stopped state of the vehicle. In this embodiment, the traveling state detection unit 22F detects whether the vehicle is in the traveling state or the stopped state based on the detection result of the vehicle speed sensor 26. To do.

The prohibiting means 22G prohibits execution of automatic stop processing by the automatic stop control means 22D during deceleration based on the lighting state of the lamp 40 detected by the lamp switch 38.
More specifically, the prohibiting unit 22G performs the following processing.
1) The prohibiting unit 22G prohibits execution of automatic stop processing by the automatic stop control unit 22D during deceleration when the lighting state of the lamp 40 is detected by the lamp switch 38.
2) The prohibiting means 22 is the travel detected by the vehicle speed sensor 26 when the engine 10 is automatically restarted by the automatic restart control means 22E from the automatic stop of the engine 10 by the automatic deceleration control means 22D during deceleration of the vehicle. The speed is equal to or higher than a second reference speed (a third reference value V3 described later) that is greater than the first reference speed (a second reference value V2 described later), or the stop state of the vehicle is detected. Until this time, execution of automatic stop processing is prohibited.

  The forced restarting means 22H is automatically activated when the lamp switch 38 detects that the lamp 40 is switched from being turned off to being lit while the engine 10 is stopped by the automatic stop process by the automatic stop control means 22D during deceleration. The automatic restart process by the restart control means 22E is forcibly executed.

As shown in FIG. 1, the ECU 22 is provided with the following five flags.
1) Automatic stop experience flag FLG1:
It is set when the automatic stop process of the engine 10 is executed by the automatic stop control means 22B while the vehicle is stopped after the ignition switch 24 is turned on and the vehicle starts running.
Therefore, the automatic stop experience flag FLG1 during the stop is maintained in the cleared state unless the automatic stop process of the engine 10 is performed by the automatic stop control means 22B during the stop after the vehicle starts running.

2) Automatic stop experience flag during deceleration FLG2:
It is set when the automatic stop process of the engine 10 is performed by the automatic stop control means 22D during deceleration after the ignition switch 24 is turned on and the vehicle starts to travel.
Therefore, the automatic stop experience flag FLG2 during deceleration is maintained in the cleared state unless the automatic stop process of the engine 10 by the automatic stop control means 22D during deceleration is performed after the vehicle starts to travel.

3) Automatic restart abnormality experience flag FLG3:
This is set when the automatic restart of the engine 10 by the automatic restart control means 22E cannot be normally performed for some reason after the ignition switch 24 is turned on and the vehicle starts running.
Therefore, the automatic restart abnormality experience flag FLG3 as long as the automatic restart of the engine 10 by the automatic restart control means 22E is not performed or the automatic restart is normally performed after the vehicle starts to travel. The cleared state is maintained.

4) Failure detection experience flag FLG4:
This is set when a failure is detected in one of various sensors and actuators that interferes with the automatic stop and restart of the engine 10 after the ignition switch 24 is turned on and the vehicle starts running.
Here, the sensors for which a failure should be detected include the ignition switch 24, the vehicle speed sensor 26, the accelerator sensor 30, the water temperature sensor 34, the air conditioner switch 36, and the like. The actuator whose failure is to be detected includes the starter 16 described above.
Therefore, the failure detection experience flag FLG4 is maintained in the cleared state as long as the failure is not detected after the vehicle starts to travel.

5) Automatic restart experience flag FLG5:
After the automatic stop process of the engine 10 by the automatic stop control means 22B during stopping or the automatic stop control means 22D during deceleration is executed, the automatic restart process of the engine 10 by the automatic restart control means 22E is normally executed. Set when.
Therefore, the cleared state is maintained when the automatic restart of the engine 10 by the automatic restart control means 22E is not performed or the automatic restart cannot be normally performed after the vehicle starts to travel. The

Next, the operation of the vehicle control device 2 will be described with reference to the flowcharts shown in FIGS.
First, the ECU 22 determines whether or not the ignition switch 24 is on (step S10).
If the ignition switch 24 is not on, all of the automatic stop experience flag FLG1, the automatic stop experience flag FLG2, the automatic restart abnormality flag FLG3, the failure detection experience flag FLG4, and the automatic restart experience flag FLG5 during deceleration are cleared. Then (step S12), the process returns to step S10.
If the ignition switch 24 is on, the ECU 22 performs a failure detection process for each sensor and actuator (step S14).
In this case, the ECU 22 maintains the clear of the failure detection experience flag FLG4 if no failure is detected, and sets the failure detection experience flag FLG4 if a failure is detected.

Next, the ECU 22 detects the traveling speed V of the vehicle based on the detection result from the vehicle speed sensor 26 (step S16).
Next, the ECU 22 determines whether or not the automatic restart abnormality experience flag FLG3 is set (step S18). If the automatic restart abnormality experience flag FLG3 is set, an abnormality has occurred in the automatic restart process of the engine 10 after the start of traveling, so the following process is skipped and the process returns to step S10. Thus, the automatic restart process of the engine 10 is prohibited.
If the automatic restart abnormality experience flag FLG3 is not set, the ECU 22 determines whether or not the failure detection experience flag FLG4 is set (step S20).
If the failure detection experience flag FLG4 is set, a failure that hinders the automatic restart processing of the engine 10 has occurred in the sensor or actuator, so the following processing is skipped and the process returns to step S10. The automatic restart process of the engine 10 is prohibited.
If failure detection experience flag FLG4 is not set, ECU 22 has travel speed V equal to or greater than third reference value V3 = 40 km / h based on travel speed V of the vehicle detected in step S16 or is stopped. Or not (step S22).

If the traveling speed V is greater than or equal to the third reference value V3 = 40 km / h or the vehicle is stopped, the ECU 22 clears the deceleration automatic stop experience flag FLG2 (step S24).
If the traveling speed V is not less than the third reference value V3 = 40 km / h or the vehicle is not stopped, the ECU 22 does not clear the automatic stop experience flag FLG2 during deceleration.
This is because, after the automatic stop process during deceleration of the engine 10 is once executed, the engine 10 must be experienced whether the traveling speed V is equal to or higher than the third reference value V3 = 40 km / h or the vehicle is stopped. This is because the automatic stop process during deceleration 10 is not performed. By doing in this way, it is suppressed that the automatic stop process during deceleration and the automatic restart process during deceleration are frequently repeated in a traffic jam or the like. As shown in FIG. 6 described later, the automatic stop process during deceleration of the engine 10 is prohibited when the automatic deceleration experience flag FLG2 during deceleration is set.
When step S22 is negative and when step S24 is performed, the ECU 22 determines whether or not the vehicle is stopped (step S26: stop detection means 22A).
If the determination result in step S26 is affirmative (if the vehicle is stopped), as shown in FIG. 3, the ECU 22 determines whether or not the engine 10 is being automatically stopped by the automatic stop process during stopping. (Step S30).

If the determination result of step S30 is negative, as shown in FIG. 4, the ECU 22 determines whether or not the automatic restart experience flag FLG5 is set (step S39A).
If the automatic restart experience flag FLG5 is not set, the ECU 22 performs an automatic stop propriety determination process while the vehicle is stopped (step S40). The automatic stop propriety determination process during stoppage determines whether or not the stop condition during stoppage is satisfied. In other words, it is performed to determine whether or not the automatic restart process of the engine 10 can be performed after the automatic stop process of the engine 10 is performed.
The stoppage automatic stop propriety determination process in step S40 performed by the ECU 22 is shown by a subroutine shown in FIG.
That is, the ECU 22 checks the deterioration state of the battery 18 (step S40A). Specifically, it is determined whether or not the battery 18 is deteriorated based on whether or not the detection result of the internal resistance value of the battery 18 supplied from the battery ECU 20 is less than a determination reference resistance value (for example, 10 mΩ).
Next, the ECU 22 checks the state of charge of the battery 18 (step S40B). Specifically, it is determined whether the SOC of the battery 18 supplied from the battery ECU 20 is equal to or higher than a determination reference SOC (for example, 80%).
Next, the ECU 22 checks whether or not there is an air conditioner (A / C) operation request based on whether the air conditioner switch 36 is on or off (whether the air conditioner switch 36 is off) (step S40C).
Next, the ECU 22 checks the water temperature of the engine 10 supplied from the water temperature sensor 34 (step S40D). Specifically, it is determined whether the water temperature is equal to or higher than a determination water temperature (for example, 60 ° C.).
Next, the ECU 22 checks the accelerator opening (step S40E). Specifically, it is determined whether or not the accelerator opening is 0% based on the operation amount of the accelerator pedal supplied from the accelerator sensor 30.

Returning to step S40 in FIG. 4, the description will be continued.
The ECU 22 determines whether or not the automatic stop process during stopping of the engine 10 is possible (whether or not the stop condition during stopping is satisfied) based on the result of step S40 (step S42). Specifically, if all of the check results in steps S40A to S40E are positive, the determination result in step S42 is positive, and if at least one of the check results in steps S40A to S40F is negative, the determination in step S42 is made. The result is negative.
If the determination result of step S42 is negative, the ECU 22 skips the following process and returns to step S10, and does not perform the automatic stop process while the engine 10 is stopped.
If the determination result in step S42 is affirmative, the ECU 22 performs an automatic stop process of the engine 10 to stop the engine 10 (step S44: automatic stop control means 22B during stoppage), and sets an automatic stop experience flag FLG1 during stoppage. Set and return to step S10.
Specifically, the ECU 22 controls the fuel injection control means 12 or the ignition control means 14 to stop the engine 10.
If the determination result in step S39A is affirmative (if the automatic restart experience flag FLG5 is set), it is determined whether or not the traveling speed V has experienced 5 km / h or more after the restart (step S39B).
If the determination result of step S39B is affirmative, the ECU 22 skips the following process and returns to step S10.
If the determination result of step S39B is negative, the automatic restart experience flag FLG5 is cleared, and the process proceeds to step S40 (step S39C).
Therefore, when the travel speed V does not increase after the automatic restart process following the automatic stop process while the vehicle is stopped and the vehicle is stopped again at less than 5 km / h, the automatic stop process while the vehicle is stopped is prohibited. Thereby, suppression of the frequency of automatic stop and automatic restart is achieved.

Next, the case where the determination result of step S26 of FIG. 2 is negative will be continued.
If step S26 is negative (if not stopped), the ECU 22 determines whether or not the engine 10 is being automatically stopped by the automatic stop process during deceleration (step S46).
If the determination result of step S46 is negative, as shown in FIG. 6, it is determined whether or not the vehicle stop automatic stop experience flag FLG1 is being set (step S48).
If the determination result in step S48 is negative, the ECU 22 has not performed the automatic stop process while the vehicle has stopped since the start of traveling. Therefore, the ECU 22 skips the following process and returns to step S10 to execute the automatic stop process during deceleration. Prohibit implementation.
If the determination result of step S48 is affirmative, the ECU 22 determines whether or not the deceleration automatic stop experience flag FLG2 is being set (step S50).
If the automatic stop experience flag during deceleration FLG2 is being set, the following process is skipped and the process returns to step S10 to prohibit execution of the automatic stop process during deceleration. That is, if the deceleration automatic stop experience flag FLG2 is not cleared in step S24 of FIG. 2, the execution of the automatic stop processing during deceleration is prohibited.
If the deceleration automatic stop experience flag FLG2 is not set, the ECU 22 determines whether the traveling speed V is equal to or higher than the first reference value V1 = 5 km / h and the second reference value V2 = 10 km / h. Is determined (step S51).
If the determination result of step S51 is negative, the ECU 22 skips the following process and returns to step S10 to prohibit the execution of the automatic stop process during deceleration (prohibiting means 22G).
If the determination result in step S51 is affirmative, the ECU 22 permits execution of the automatic stop process during deceleration, and performs an automatic stop propriety determination process during deceleration (step S52).
In other words, in other words, the processes of steps S46 and S48 are performed after the vehicle starts traveling, and the automatic stop control process of the engine 10 by the stop automatic stop control means 22B is performed, and then the engine 10 by the automatic restart control means 22E. When the automatic restart process is executed, the automatic stop process of the engine 10 by the automatic stop control means 22D during deceleration is permitted.
More specifically, the prohibiting means 22G automatically controls the engine 10 by the automatic stop control means 22D during deceleration from when the vehicle starts to travel until it experiences at least the automatic stop processing of the engine 10 by the automatic stop control means 22B. Prohibit execution of stop processing.
Further, the prohibiting means 22G automatically stops during deceleration based on the state at the time of the automatic restart process of the engine 10 by the automatic restart control means 22E performed after the automatic stop process of the engine 10 by the automatic stop control means 22B during stoppage. The automatic stop process of the engine 10 by the control means 22D is prohibited. In other words, the prohibiting unit 22G prohibits the automatic restart process during deceleration when the automatic restart process after the automatic stop process while the vehicle is stopped is not normally performed.

  In other words, in other words, when the engine 10 is automatically restarted by the automatic restart control unit 22E from the automatic stop of the engine 10 by the automatic deceleration control unit 22D during deceleration during the deceleration of the vehicle, the prohibiting unit 22G The traveling speed V detected by the vehicle speed sensor 26 is equal to or higher than a second reference speed (third reference value V3) greater than the first reference speed (second reference value V2), or the vehicle is stopped. The automatic stop process is prohibited until a state is detected.

The process of determining whether automatic stop during deceleration in step S52 performed by the ECU 22 is shown by a subroutine shown in FIG.
Steps S52A to S52E in the subroutine of FIG. 7 are the same as steps S40A to S40E of FIG.
Step S52F of the subroutine is a lamp check in which the ECU 22 checks whether or not the lamp switch 38 is off. That is, if the lamp switch 38 is off, the lamp 40 is in the off state.

As shown in FIG. 6, the ECU 22 determines whether or not the automatic stop process during deceleration of the engine 10 is possible (whether or not the stop condition during deceleration is satisfied) based on the result of step S52 (step S52). S54). Specifically, if all of the check results in steps S52A to S52F are positive, the determination result in step S52 is positive, and if at least one of the check results in steps S52A to S52F is negative, the determination in step S52 is made. The result is negative.
If the determination result in step S54 is negative, the ECU 22 skips the following process and returns to step S10, and does not perform the automatic stop process during deceleration of the engine 10.
If the determination result of step S54 is affirmative, the ECU 22 performs an automatic stop process of the engine 10 to stop the engine 10 (step S56: automatic stop control means during deceleration 22D), and sets an automatic stop experience flag FLG2 during deceleration. Set and return to step S10.
Specifically, the ECU 22 controls the fuel injection control means 12 or the ignition control means 14 to stop the engine 10.
That is, in other words, the processing of steps S52 and S54 prohibits the prohibiting means 22G from executing the automatic stop processing by the automatic stop control means 22D during deceleration when the lamp switch 38 detects the lamp lighting state.

Next, returning to FIG. 3, the case where the determination result of step S30 is affirmative will be described.
If the determination result in step S30 is affirmative, a determination process for determining whether or not to perform automatic restart while the engine 10 is stopped is performed (step S34).
The stopping automatic restart determination process in step S34 performed by the ECU 22 is shown by a subroutine shown in FIG.
That is, the ECU 22 checks the state of charge of the battery 18 (step S34A). Specifically, it is determined whether the SOC of the battery 18 supplied from the battery ECU 20 is less than a determination reference SOC (for example, 80%).
Next, the ECU 22 checks whether or not there is a request for operating the air conditioner (A / C) based on whether the air conditioner switch 36 is on or off (whether the air conditioner switch 36 is on) (step S34B).
Next, the ECU 22 checks the water temperature of the engine 10 supplied from the water temperature sensor 34 (step S34C). Specifically, it is determined whether or not the water temperature is lower than a determination water temperature (for example, 50 ° C.).
Next, the ECU 22 checks the accelerator opening (step S34D). Specifically, it is determined whether the accelerator opening exceeds 0% based on the operation amount of the accelerator pedal supplied from the accelerator sensor 30.

Returning to step S34 in FIG. 3, the description will be continued.
The ECU 22 determines whether or not the automatic restart process during stopping of the engine 10 is possible (whether or not the automatic restart condition during stopping is satisfied) based on the result of step S34 (step S36). Specifically, if at least one of the check results in steps S34A to S34D is positive, the determination result in step S34 is positive, and if all of the check results in steps S34A to S34D are negative, the determination in step S34 is made. The result is negative.
If the determination result in step S36 is negative, the ECU 22 skips the following process and returns to step S10, and does not perform the automatic restart process while the engine 10 is stopped.
If the determination result in step S36 is affirmative, the ECU 22 controls the fuel injection control means 12 and the ignition control means 14 to perform an automatic restart process of the engine 10 (step S38: automatic restart control means 22E).
The automatic restart process of the engine 10 in step S38 performed by the ECU 22 is shown by a subroutine shown in FIG.
As shown in FIG. 11, the ECU 22 determines whether or not a predetermined time (for example, 1 sec) has elapsed after execution of the automatic restart (step S38A).
If the determination result of step 38A is negative, it is determined whether the rotational speed N of the engine 10 is equal to or higher than a predetermined rotational speed (for example, 500 rpm) based on the detection result of the rotational speed sensor 28 (step S38B).
If the determination result in step S38B is affirmative, it is determined that the engine 10 has started normally, the automatic restart experience flag FLG5 is set, the process in step S38 is terminated, and the process returns to step S10 (step S38E). ).
If the determination result in step S38B is negative, it is determined that the automatic restart process is to be continued, and the same operation is performed (step S38C).
If the determination result in step S38A is affirmative, it is determined that the engine 10 has not started normally because the engine speed N has not reached the predetermined engine speed even after a predetermined time has elapsed. The automatic restart abnormality experience flag FLG3 is set, the process of step S38 is terminated, and the process returns to step S10 (step S38D).

Next, returning to FIG. 2, the case where the determination result of step S46 is affirmative will be described.
If the determination result in step S46 is affirmative, as shown in FIG. 5, the ECU 22 determines whether or not the vehicle is in a traveling state based on the detection result of the vehicle speed sensor 26 (step S57A: traveling state detection means). 22F).
If the determination result in step S57A is affirmative (the vehicle is in a running state), the ECU 22 determines whether or not the lamp 40 is lit (on) based on the detection result of the lamp switch 38 (step). S57B).
Note that the automatic stop process during deceleration (step S56) performed prior to step S57B is prohibited from being performed with the lamp 40 turned on. Therefore, at the time of step S57B, the lamp 40 is in an extinguished state.
Therefore, if the determination result of step S57B is negative (the lighting state of the lamp 40 is not detected), the lamp 40 is off, and the determination result of step S57B is affirmative (the lighting state of the lamp 40). Is detected), it means that the lamp 40 has been switched from the unlit state to the lit state.
If the determination result in step S57B is negative, the ECU 22 performs a determination process as to whether or not the automatic restart process during deceleration of the engine 10 can be performed (step S58).
The automatic restart determination process during deceleration in step S58 performed by the ECU 22 is shown by a subroutine shown in FIG.
Steps S58A to S58D in the subroutine of FIG. 8 are the same as steps S34A to S34D of FIG.
The ECU 22 determines whether or not the automatic restart process during deceleration of the engine 10 is possible based on the result of step S58 (whether or not the automatic restart condition during stopping is satisfied) (step S60). Specifically, if at least one of the check results in steps S58A to S58E is positive, the determination result in step S60 is positive, and if all of the check results in steps S58A to S58E are negative, the determination in step S60 is made. The result is negative.
If the determination result in step S60 is negative, the ECU 22 skips the following process and returns to step S10, and does not perform the automatic restart process during deceleration of the engine 10.
If the determination result of step S60 is affirmative, the ECU 22 controls the fuel injection control means 12 and the ignition control means 14 to perform an automatic restart process of the engine 10 (step S62: automatic restart control means 22E). The automatic restart process of the engine 10 in step S62 performed by the ECU 22 is the same as the subroutine (step S38) shown in FIG.
If the determination result in step S57B is affirmative, the lamp 40 has been switched from the extinguished state to the lit state when the automatic stop process during deceleration is being performed while the vehicle is running. In this case, the ECU 22 forcibly performs the automatic restart process of the engine 10 (step S62: forced restart means 22H).
In this case, the restart of the engine 10 is preferably performed with priority over the lighting of the lamp 40. That is, if the engine 10 is restarted while the lamp 38 is lit, the lamp 40 is dimmed as described above along with the restart, which may cause the driver to feel uncomfortable. Therefore, if the automatic restart process is preferentially performed in synchronization with the switching of the lamp 40 from the off state to the on state, a slight delay time is generated until the lamp 40 is completely turned on. This is because the driver does not feel uncomfortable.
In other words, in other words, the processing of steps S57A, S57B, and S62 is performed by the forced restarting means 22H in the state where the engine 10 is stopped by the automatic stop processing by the automatic stop control means 22D during deceleration and the lamp 40 is operated by the lamp switch 38. When switching from turning off to turning on is detected, automatic restart processing by the automatic restart control means 22E is forcibly executed.

On the other hand, if the determination result in step S57A is negative (the vehicle is in a stopped state), the ECU 22 skips the determination process as to whether or not the automatic restart process during deceleration of the engine 10 can be performed, and step S34 in FIG. The process proceeds to the automatic restart determination process while the vehicle is stopped. That is, when the vehicle reaches the stop state from the running state, the process proceeds to the automatic restart determination process during stopping, and thereafter the same process is performed.
In the automatic restart determination process during stop (step S34), since the lamp check for checking whether or not the lamp switch 38 is on is not performed, even if the lamp switch 38 is turned on from off when the vehicle is stopped ( Even if the lamp 40 is switched from the off state to the on state), the automatic restart condition during stopping is not satisfied, the determination result of step S36 is negative, and the process returns to step S10.

As described above, according to the present embodiment, the prohibiting unit 22G prohibits execution of the automatic stop process of the engine 10 by the automatic stop control unit 22D during deceleration when the lighting of the lamp 40 is detected. I did it.
Therefore, the phenomenon that the supply voltage from the battery 18 temporarily decreases and the lamp 40 is dimmed by the starter 16 operating at the time of automatic restart after the automatic stop of the engine 10 during deceleration of the vehicle is prevented. It is possible to suppress the operation of the lamp 40 from giving the driver a sense of incongruity.

In the present embodiment, the forced restarting means 22H detects that the lamp 40 is switched from being turned off to being turned on while the engine 10 is stopped by the automatic stop process by the automatic deceleration stop control means 22D. In such a case, the automatic restart process of the engine 10 is forcibly executed.
As described above, if the automatic restart process is preferentially performed in synchronization with the switching of the lamp 40 from the off state to the on state, a slight delay time is generated until the lamp 40 is completely turned on. Since the time hardly gives the driver a sense of incongruity, the operation of the lamp can further suppress the sense of discomfort to the driver.

In the present embodiment, as shown in step S51 of FIG. 6, the automatic stop process during deceleration is permitted when the traveling speed V of the vehicle is equal to or lower than the first reference speed (second reference value V2). When the vehicle traveling speed V exceeds the first reference speed (second reference value V2), the automatic stop process during deceleration is prohibited.
In other words, the stop condition during deceleration that must be satisfied in order to perform the automatic stop process during deceleration includes a condition that the traveling speed V of the vehicle is equal to or lower than the first reference speed (second reference value V2). Will be.
Further, as shown in step S50 of FIG. 6, the prohibiting means 22G is configured to automatically restart the engine 10 by the automatic restart control means 22E from the automatic stop of the engine 10 by the automatic stop control means 22D during deceleration during deceleration of the vehicle. When the traveling speed V detected by the vehicle speed sensor 26 is greater than or equal to the second reference speed (third reference value V3) greater than the first reference speed (second reference value V2), or the vehicle The automatic stop process is prohibited until the vehicle's stop state is detected.
Therefore, even when the lamp 40 is frequently turned on and off in a low speed state, the frequency of the automatic stop and automatic restart of the engine 10 can be suppressed, fuel consumption can be reduced, and the life of the starter 16 can be extended. Is advantageous.

  2 ... Vehicle control device, 10 ... Engine, 12 ... Fuel injection control means, 14 ... Ignition control means, 16 ... Starter, 18 ... Battery, 20 ... Battery ECU, 22 ... ECU, 22A ...... Stop detection means, 22B ... Automatic stop control means while stopped, 22C .... Deceleration detection means, 22D .... Deceleration automatic stop control means, 22E .... Automatic restart control means, 22F .... Running state detection means, 22G: Inhibiting means, 22H: Forced restarting means, 24 ... Ignition switch, 26 ... Vehicle speed sensor, 28 ... Speed sensor, 30 ... Acceleration sensor, 32 ... Brake sensor, 34 ... Water temperature sensor 36 ... Air conditioner switch, 38 ... Lamp switch, 40 ... Lamp.

Claims (4)

Deceleration detection means for detecting the deceleration state of the vehicle;
An automatic stop control unit during deceleration when the deceleration detection unit detects a deceleration state of the vehicle, and an automatic stop process of the internal combustion engine is performed when a deceleration stop condition is satisfied;
Stop detection means for detecting the stop state of the vehicle;
A stop automatic stop control means for executing an automatic stop process of the internal combustion engine when it is determined that the stop condition of the vehicle is detected by the stop detection means and a stop condition during the stop is satisfied;
Automatic restart control means for performing an automatic restart process of the internal combustion engine when a restart condition is satisfied during the automatic stop of the internal combustion engine;
Lamp state detection means for detecting the lighting state of the lamp of the vehicle;
A vehicle control device comprising prohibiting means for prohibiting execution of the automatic stop process and the automatic restart process,
The prohibiting means prohibits execution of automatic stop processing by the automatic stop control means during deceleration when the lamp state detection means detects lighting of the lamp ,
The vehicle stop apparatus according to claim 1, wherein the automatic stop control means during the stop performs the automatic stop process when it is determined that the stop condition during the stop is satisfied regardless of a lighting state of the lamp . When the internal combustion engine is stopped by the automatic stop process by the automatic stop control means during deceleration and the lamp state detection means detects a switch from turning off the lamp to turning on, the automatic restart process The vehicle control apparatus according to claim 1, further comprising: a forced restarting unit that forcibly performs the operation.   When the internal combustion engine is stopped by the automatic stop process by the automatic stop control means while the vehicle is stopped, the automatic restart control unit is configured to perform the internal combustion engine when the restart condition is satisfied regardless of the lighting state of the lamp. Performs automatic engine restart processing
  The vehicle control device according to claim 1 or 2, wherein Comprising a speed detecting means for detecting the traveling speed of the vehicle;
The decelerating stop condition includes that the traveling speed detected by the speed detecting means is equal to or lower than a first reference speed,
The prohibition means is detected by the speed detection means when the internal combustion engine is automatically restarted by the automatic restart control means from the automatic stop of the internal combustion engine by the automatic stop control means during deceleration during deceleration of the vehicle. The automatic stop process is prohibited until the travel speed exceeds a second reference speed greater than the first reference speed or until a stop state of the vehicle is detected. The vehicle control device according to any one of claims 1 to 3 .

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