JP2022020244A - Idling stop control device - Google Patents

Abstract

To control idling stop control according to a situation in which an engine hood is opened.SOLUTION: An idling stop control device 100 for a vehicle includes an idling stop control unit 12 which executes idling stop control for automatically stopping an engine of the vehicle when a predetermined automatic stop condition is satisfied, and for automatically restarting the engine when a predetermined restart condition is satisfied after the automatic stop. When it is determined that an engine hood is opened in a state where the automatic stop condition is satisfied, the idling stop control unit 12 automatically restarts the engine when a stop state of the vehicle is maintained from starting of the vehicle until the automatic stop condition is satisfied. When the stop state of the vehicle is not maintained from starting of the vehicle until the automatic stop condition is satisfied, the idling stop control unit performs restart restriction which does not restart the engine even if the restart condition is satisfied.SELECTED DRAWING: Figure 3

Description

The present invention relates to an idling stop control device.

Conventionally, Japanese Patent Application Laid-Open No. 2016-169615 is known as a technical document relating to an idling stop control device. In this publication, idling stop control is performed in which the engine is automatically stopped when a predetermined automatic stop condition is satisfied while the vehicle is running, and then the engine is restarted when a predetermined restart condition is satisfied. It is shown that the control device prohibits idling stop control when the engine hood of the vehicle is open.

Japanese Unexamined Patent Publication No. 2016-169615

In the conventional idling stop control device described above, idling stop control is prohibited in order to avoid an unintentional engine restart during an inspection inside the hood performed by opening the engine hood of the vehicle. However, since the situation where the engine hood is opened is not limited to the time of inspection, it is desirable to control the idling stop control according to the situation.

Therefore, in the present technical field, it is desired to provide an idling stop control device capable of controlling idling stop control according to a situation where the engine hood is opened.

The idling stop control device according to one aspect of the present invention is an idling stop control device for a vehicle, which automatically stops the engine of the vehicle when a predetermined automatic stop condition is satisfied, and after the automatic stop, a predetermined restart condition. The idling stop control unit is provided with an idling stop control unit that automatically restarts the engine when is satisfied, and a hood open / close determination unit that determines whether or not the engine hood of the vehicle is open. If the hood open / close determination unit determines that the engine hood is open while the automatic stop condition is satisfied, the engine is automatically operated when the vehicle is maintained in the stopped state from the start of the vehicle to the establishment of the automatic stop condition. When the stopped state of the vehicle is not maintained from the start of the vehicle to the satisfaction of the automatic stop condition, the restart is restricted so that the engine is not restarted even if the restart condition is satisfied.

According to one aspect of the present invention, the idling stop control can be controlled according to the situation in which the engine hood is opened.

It is a block diagram which shows the idling stop control device which concerns on this embodiment. It is a flowchart which shows an example of the automatic stop processing of idling stop control. It is a flowchart which shows an example of the engine restart process of idling stop control.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram showing an idling stop control device according to the present embodiment.
The idling stop control device 100 shown in FIG. 1 is mounted on a vehicle such as a passenger car, and executes idling stop control when the vehicle is stopped due to waiting for a signal or the like. The idling stop control will be described in detail later.

[Configuration of idling stop control device]
As shown in FIG. 1, the idling stop control device 100 includes an ECU [Electronic Control Unit] 10 that collectively manages the device. The ECU 10 is an electronic control unit having a CPU [Central Processing Unit], a ROM [Read Only Memory], a RAM [Random Access Memory], and the like. In the ECU 10, for example, the program stored in the ROM is loaded into the RAM, and the program loaded in the RAM is executed by the CPU to realize various functions. The ECU 10 may be composed of a plurality of electronic units.

The ECU 10 is connected to a vehicle speed sensor 1, a driving operation detection unit 2, an engine hood detection unit 3, an engine drive unit 4, and a notification unit 5.

The vehicle speed sensor 1 is a detector that detects the speed of the vehicle. As the vehicle speed sensor 1, for example, a wheel speed sensor provided for a wheel of a vehicle or a drive shaft that rotates integrally with the wheel or the like and detects the rotation speed of the wheel is used. The vehicle speed sensor transmits the detected vehicle speed information (wheel speed information) to the ECU 10.

The driving operation detection unit 2 detects the driving operation of the vehicle by the driver. The driving operation detection unit 2 includes an accelerator sensor and a brake sensor. The accelerator sensor detects the amount of operation (depression) of the accelerator pedal by the driver. The brake sensor detects the amount of operation (depression) of the brake pedal by the driver. The accelerator sensor and the brake sensor may detect the stepping speed in addition to the stepping amount. The driving operation detection unit 2 may include a steering sensor. The driving operation detection unit 2 transmits the driving operation information regarding the detected driver's operation to the ECU 10.

The engine hood detection unit 3 is provided on the engine hood of the vehicle and detects the opening and closing of the engine hood. A well-known structure can be adopted for the engine hood detection unit 3. The engine drive unit 4 is a drive unit that controls the stop and start of the engine. The engine drive unit 4 may control the stop and start of the engine by controlling the fuel injection amount of the injector in the gasoline engine and the ignition in the ignition device. When the vehicle is a hybrid vehicle or an electric vehicle, the engine drive unit 4 may control the stop and start of the engine by controlling the motors constituting the engine.

The notification unit 5 includes a display or a speaker for the inside of the vehicle, and performs various notifications to the driver by at least either image display or voice output. The display may be an MID [Multi Information Display], and the image display may be an icon display or a message display. The notification unit 5 may include a warning lamp. The notification unit 5 notifies the driver regarding the idling stop control. Even if the notification unit 5 notifies the driver by turning on the corresponding lamp when the idling stop control is on and turning off the lamp when the idling stop control is off. good.

Next, the functional configuration of the ECU 10 will be described. The ECU 10 has a hood open / close determination unit 11 and an idling stop control unit 12.

The hood opening / closing determination unit 11 determines the opening / closing of the engine hood of the vehicle based on the detection result of the engine hood detection unit 3. The hood opening / closing determination unit 11 may always determine the opening / closing of the engine hood of the vehicle, or may determine the opening / closing of the engine hood of the vehicle only when the engine of the vehicle is automatically stopped by the idling stop control.

The idling stop control unit 12 controls the idling stop of the vehicle. The idling stop control is a control that automatically stops the engine of the vehicle when a predetermined automatic stop condition is satisfied, and automatically restarts the engine when a predetermined restart condition is satisfied after the automatic stop.

The automatic stop condition is a condition for automatically stopping the engine of the vehicle in the idling stop control. The automatic stop condition is, for example, a condition that is satisfied when the vehicle speed is in the preset automatic engine stop speed range and the driver does not operate the accelerator. The engine automatic stop speed range can be set to, for example, 10 km / h or less. The automatic stop condition may be a condition that is satisfied when the driver operates the brake while the vehicle speed is 0 km / h. A plurality of automatic stop conditions may be set.

The idling stop control unit 12 determines whether or not the automatic stop condition is satisfied, for example, based on the vehicle speed information detected by the vehicle speed sensor 1 and the driving operation information detected by the driving operation detection unit 2. When the idling stop control unit 12 determines that the automatic stop condition is satisfied, the idling stop control unit 12 automatically stops the engine of the vehicle as an idling stop control. The idling stop control unit 12 automatically stops the engine by transmitting a control signal to the engine drive unit 4. At this time, the idling stop control unit 12 may notify the driver of the automatic stop of the engine of the vehicle by displaying an image by the notification unit 5. Even if the automatic stop condition is satisfied, it is not necessary to perform automatic stop if the engine is not driving.

The restart condition is a condition for automatically restarting the engine of the vehicle automatically stopped in the idling stop control. The restart condition is satisfied, for example, when the accelerator operation is performed by the driver or when the brake operation that has been continued by the driver since the automatic stop is released. Multiple restart conditions may be set.

The idling stop control unit 12 determines whether or not the restart condition is satisfied, for example, based on the driving operation information detected by the driving operation detecting unit 2. When the idling stop control unit 12 determines that the restart condition is satisfied, the idling stop control unit 12 automatically restarts the engine of the vehicle that has been automatically stopped. The idling stop control unit 12 restarts the engine by transmitting a control signal to the engine drive unit 4. The idling stop control unit 12 may notify the driver of the restart of the engine of the vehicle by displaying an image by the notification unit 5.

When it is determined that the engine hood is open, the idling stop control unit 12 controls the idling stop control according to the situation in which the engine hood is opened.

Specifically, when the idling stop control unit 12 determines that the engine hood is open by the hood open / close determination unit 11 in a state where the automatic stop condition is satisfied, the idling stop control unit 12 of the vehicle from the start of the vehicle to the establishment of the automatic stop condition. The engine is automatically restarted when the stopped state is maintained. The vehicle is started by, for example, pressing the push start switch of the vehicle. The vehicle may be started by a means other than the push start switch.

The idling stop control unit 12 determines whether or not the stopped state of the vehicle is maintained from the start of the vehicle to the establishment of the automatic stop condition, for example, based on the vehicle speed information detected by the vehicle speed sensor 1. When the vehicle speed is maintained at 0 km / h from the start of the vehicle, the idling stop control unit 12 determines that the stopped state of the vehicle is maintained from the start of the vehicle to the establishment of the automatic stop condition. The idling stop control unit 12 determines that the stopped state of the vehicle is maintained from the start of the vehicle to the establishment of the automatic stop condition when the shift range is maintained in the parking state from the start of the vehicle. You may.

When the idling stop control unit 12 determines that the stopped state of the vehicle is maintained from the start of the vehicle to the establishment of the automatic stop condition, the idling stop control unit 12 automatically restarts the engine. That is, the idling stop control unit 12 performs relief work (so-called jumping start) when the automatic stop condition is satisfied, the engine is automatically stopped, and the engine hood of the vehicle is opened while the stopped state of the vehicle is maintained from the start of the vehicle. ), Etc. It is thought that the engine hood was opened, so the engine is automatically restarted when the engine hood is opened. The idling stop control unit 12 may notify the driver before restarting the engine by voice output from the notification unit 5.

Further, when the idling stop control unit 12 determines that the engine hood is open by the hood open / close determination unit 11 in a state where the automatic stop condition is satisfied, the idling stop control unit 12 stops the vehicle from the start of the vehicle to the satisfaction of the automatic stop condition. When the state is not maintained, the restart limit is applied so that the engine is not restarted even if the restart condition is satisfied.

That is, the idling stop control unit 12 says that when the automatic stop condition is satisfied when waiting for a signal while the vehicle is running, the engine is automatically stopped, and the engine hood of the vehicle is opened, the engine hood is opened for inspection or the like. Since it is possible, the restart is restricted so that the engine will not be restarted accidentally. The idling stop control unit 12 may notify the driver that the restart of the engine has been restricted by voice output from the notification unit 5. The driver can start the engine by operating the engine switch or the like.

[Processing of idling stop controller]
Next, the processing by the idling stop control device 100 according to the present embodiment will be described with reference to FIGS. 2 and 3. FIG. 2 is a flowchart showing an example of the automatic stop processing of idling stop control. The automatic stop process is executed when the idling stop function is turned on.

As shown in FIG. 2, the ECU 10 of the idling stop control device 100 determines whether or not the automatic stop condition is satisfied by the idling stop control unit 12 as S10. The idling stop control unit 12 makes the above determination based on, for example, the vehicle speed information detected by the vehicle speed sensor 1 and the driving operation information detected by the driving operation detecting unit 2.

If it is not determined that the automatic stop condition is satisfied (S10: NO), the ECU 10 ends the current process. After that, the ECU 10 repeats the determination of S10 again. When it is determined that the automatic stop condition is satisfied (S10: YES), the ECU 10 shifts to S12.

In S12, the ECU 10 automatically stops the engine by the idling stop control unit 12. The idling stop control unit 12 automatically stops the engine by transmitting a control signal to the engine drive unit 4. Even if the automatic stop condition is satisfied, it is not necessary to perform automatic stop if the engine is not driving.

FIG. 3 is a flowchart showing an example of engine restart processing of idling stop control. The engine restart process is executed when the automatic stop condition shown in FIG. 2 is satisfied.

As shown in FIG. 3, the ECU 10 determines whether or not the engine hood of the vehicle is open by the hood open / close determination unit 11 as S20. The ECU 10 makes the above determination based on the detection result of the engine hood detection unit 3. When it is not determined that the engine hood of the vehicle is open (S20: NO), the ECU 10 shifts to S22. When it is determined that the engine hood of the vehicle is open (S20: YES), the ECU 10 shifts to S24.

In S22, the ECU 10 determines whether or not the restart condition is satisfied by the idling stop control unit 12. The idling stop control unit 12 makes the above determination based on, for example, the driving operation information detected by the driving operation detecting unit 2. If it is not determined that the restart condition is satisfied (S22: NO), the ECU 10 returns to S20 and repeats the process. When it is determined that the restart condition is satisfied (S22: YES), the ECU 10 shifts to S28.

In S24, the ECU 10 determines whether or not the stopped state of the vehicle is maintained from the start of the vehicle to the establishment of the automatic stop condition by the idling stop control unit 12. The idling stop control unit 12 makes the above determination based on, for example, the vehicle speed information detected by the vehicle speed sensor 1. When it is not determined that the stopped state of the vehicle is maintained from the start of the vehicle to the establishment of the automatic stop condition (S24: NO), the ECU 10 shifts to S26. When it is determined that the stopped state of the vehicle is maintained from the start of the vehicle to the establishment of the automatic stop condition (S24: YES), the ECU 10 shifts to S28.

In S26, the ECU 10 limits the restart by the idling stop control unit 12. The idling stop control unit 12 does not restart the engine even if the restart condition is satisfied. The idling stop control unit 12 may notify the driver that the restart of the engine has been restricted by voice output from the notification unit 5. After that, the ECU 10 ends this process. When the driver starts the engine by operating the engine switch or the like, the restart restriction is released.

In S28, the ECU 10 restarts the engine by the idling stop control unit 12. The idling stop control unit 12 restarts the engine by transmitting a control signal to the engine drive unit 4. The idling stop control unit 12 may notify the driver of the restart of the engine of the vehicle by displaying an image by the notification unit 5. After that, the ECU 10 ends this process.

According to the idling stop control device 100 according to the present embodiment described above, the idling stop control can be appropriately controlled according to the situation in which the engine hood is opened after the engine is automatically stopped by the idling stop control.

Specifically, in the idling stop control device 100, when the engine hood is opened after the automatic stop condition is satisfied and the stopped state of the vehicle is maintained from the start of the vehicle to the establishment of the automatic stop condition, the rescue operation is performed. Since it is thought that the engine hood was opened due to (so-called jumping start) etc., the engine can be automatically restarted when the engine hood is opened, improving the convenience of users including the driver. Can be planned.

Further, in the idling stop control device 100, when the engine hood is opened after the automatic stop condition is satisfied and the stopped state of the vehicle is not maintained from the start of the vehicle to the satisfaction of the automatic stop condition, the vehicle is in the middle of traveling. Since it is thought that the engine hood was opened for inspection, etc., restart restrictions are applied so that the engine will not be restarted accidentally. This makes it possible to prevent the engine from being restarted at an unintended timing during the inspection inside the hood.

Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments. The present invention can be carried out in various forms having various changes and improvements based on the knowledge of those skilled in the art, including the above-mentioned embodiment.

The idling stop control device 100 does not necessarily have to have the notification unit 5. When the stopped state of the vehicle is detected only from the shift range, it is not essential to use the vehicle speed sensor 1.

1 ... Vehicle speed sensor, 2 ... Driving operation detection unit, 3 ... Engine hood detection unit, 4 ... Engine drive unit, 5 ... Notification unit, 10 ... ECU, 11 ... Hood open / close determination unit, 12 ... Idling stop control unit, 100 ... Idling stop control device.

Claims (1)

It is an idling stop control device for vehicles.
An idling stop control unit that performs idling stop control that automatically stops the engine of the vehicle when a predetermined automatic stop condition is satisfied and automatically restarts the engine when the predetermined restart condition is satisfied after the automatic stop. ,
A hood open / close determination unit that determines whether or not the engine hood of the vehicle is open,
Equipped with
When the idling stop control unit determines that the engine hood is open by the hood open / close determination unit in a state where the automatic stop condition is satisfied, the idling stop control unit determines that the engine hood is open.
When the stopped state of the vehicle is maintained from the start of the vehicle to the establishment of the automatic stop condition, the engine is automatically restarted.
Idling stop control that limits restart without restarting the engine even if the restart condition is satisfied when the stopped state of the vehicle is not maintained from the start of the vehicle to the satisfaction of the automatic stop condition. Device.

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