JP6367497B2 - VEHICLE CONTROL DEVICE, VEHICLE CONTROL SYSTEM, AND CONTROL METHOD FOR VEHICLE CONTROL DEVICE - Google Patents

Description

  The present invention relates to a vehicle control device, a vehicle control system, and a control method for the vehicle control device.

  Conventionally, a vehicle has been provided with an idling stop function for automatically stopping an internal combustion engine when the vehicle stops due to a signal or the like in order to suppress fuel consumption (see Patent Document 1).

JP2015-98991A

  However, when the first idling stop is executed after the internal combustion engine is started, the idling stop processing time, that is, the required time is different between the second and subsequent idling stops. Therefore, the idling stop is performed after the throttle is closed. There was a difference in the waiting time before starting.

  Specifically, while the waiting time for the first idling stop is long, the waiting time for the second and subsequent idling stops is relatively short. As described above, since there is a difference in the waiting time until the start of the idling stop, there is a problem that the driver may feel uncomfortable.

  Therefore, the present invention relates to a vehicle control device and a vehicle capable of suppressing a driver's uncomfortable feeling by suppressing a difference in waiting time between the first execution of idling stop and the second and subsequent executions. It is an object of the present invention to provide a control system and a control method for a vehicle control device.

A vehicle control device according to an aspect of the present invention includes:
A vehicle control device having a control unit that executes idling stop control for temporarily stopping an internal combustion engine of a vehicle,
The controller is
In a first case where the idling stop control is not yet executed after the internal combustion engine is started when a closed throttle operation for reducing the throttle opening to a reference opening or less is performed, When the vehicle speed is equal to or higher than the first determination speed, the idling stop control is executed,
In the second case where the idling stop control has already been executed after the internal combustion engine is started when the closed throttle operation is performed, the second determination speed is higher than the first determination speed. When this is the case, the idling stop control is executed again.

In the vehicle control device,
The controller is
In the first case, when the state where the vehicle speed is equal to or higher than the first determination speed continues for the first determination time or longer, the idling stop control is executed,
In the second case, even when the idling stop control is executed again when the vehicle speed is equal to or higher than the second determination speed for a second determination time longer than the first determination time. Good.

In the vehicle control device,
The controller is
The first case or the second case may be detected based on a flag indicating whether or not the idling stop control has been executed.

In the vehicle control device,
The controller is
The idling stop control may be executed by not transmitting a control signal instructing ignition to an ignition device that ignites the ignition plug of the internal combustion engine.

In the vehicle control device,
The rotational speed of the internal combustion engine may decrease with a decrease in the throttle opening.

A vehicle control system according to an aspect of the present invention includes:
An internal combustion engine of the vehicle;
A vehicle control system having a control unit that executes idling stop control for temporarily stopping the internal combustion engine,
The controller is
In a first case where the idling stop control is not yet executed after the internal combustion engine is started when a closed throttle operation for reducing the throttle opening to a reference opening or less is performed, When the vehicle speed is equal to or higher than the first determination speed, the idling stop control is executed,
In the second case where the idling stop control has already been executed after the internal combustion engine is started when the closed throttle operation is performed, the second determination speed is higher than the first determination speed. When this is the case, the idling stop control is executed again.

In the vehicle control system,
A vehicle speed sensor for detecting the vehicle speed;
The control unit may detect that the vehicle speed is equal to or higher than the first determination speed or equal to or higher than the second determination speed based on the detected vehicle speed.

In the vehicle control system,
A throttle sensor for detecting the opening of the throttle;
The controller may detect that the closed throttle operation has been performed based on the detected throttle opening.

A control method for a vehicle control device according to an aspect of the present invention includes:
A control method for a vehicle control device for executing idling stop control for temporarily stopping an internal combustion engine of a vehicle,
The idling stop control for temporarily stopping the internal combustion engine after the start of the internal combustion engine when the closed throttle operation for reducing the throttle opening to a reference opening or less is performed has not yet been executed. In this case, when the vehicle speed of the vehicle is equal to or higher than the first determination speed, the idling stop control is executed,
In the second case where the idling stop control has already been executed after the internal combustion engine is started when the closed throttle operation is performed, the second determination speed is higher than the first determination speed. When this is the case, the idling stop control is executed again.

The vehicle control device according to the present invention includes a control unit that executes idling stop control for temporarily stopping the internal combustion engine of the vehicle. In the first case where the idling stop control is not yet executed after the internal combustion engine is started when the closed throttle operation for reducing the throttle opening to the reference opening or less is performed. The idling stop control is executed when the vehicle speed is equal to or higher than the first determination speed. On the other hand, in the second case where the idling stop control has already been executed after the internal combustion engine is started when the closed throttle operation is performed, the control unit performs the second determination in which the vehicle speed is higher than the first determination speed. When it is above the speed, the idling stop control is executed again.
As described above, according to the present invention, by making the determination speed at the second and subsequent executions higher than the determination speed at the first execution of the idling stop control, the first execution and the second and subsequent executions of the idling stop control are performed. The difference in waiting time between the times can be suppressed, and the driver's uncomfortable feeling can be suppressed.

It is a block diagram which shows the vehicle control system which concerns on this embodiment. It is a flowchart which shows the operation example of the vehicle control system which concerns on this embodiment.

  Embodiments according to the present invention will be described below with reference to the drawings. This embodiment does not limit the present invention.

  A vehicle control system 1 of the present embodiment shown in FIG. 1 is a system that is mounted on a vehicle such as a motorcycle and controls an internal combustion engine of the vehicle. The motorcycle may be a hybrid motorcycle that uses both an internal combustion engine and a motor as a power source.

  As shown in FIG. 1, the vehicle control system 1 includes a vehicle control device 10, an internal combustion engine 2, a motor generator 3, a vehicle speed sensor 6, a throttle sensor 7, and an ignition device 8. The vehicle control device 10 includes a control unit 4 and a storage unit 5.

(Internal combustion engine 2)
The internal combustion engine 2 will be described in detail. The internal combustion engine 2 takes in a mixture of fuel and air injected from the fuel injector into the combustion chamber, for example, by moving a piston to generate a negative pressure in the combustion chamber. The internal combustion engine 2 compresses the air-fuel mixture taken into the combustion chamber with a piston, thereby raising the temperature of the air-fuel mixture so that the air-fuel mixture is easily combusted.

  The control unit 4 transmits a control signal A instructing ignition of the mixture to the ignition device 8 at a predetermined timing according to the compression of the mixture. In response to the transmission of the control signal A from the control unit 4, the ignition device 8 causes a current to flow through the primary coil of an ignition coil including a primary coil and a secondary coil, for example. A high voltage is generated in the secondary coil in response to the current flowing in the primary coil, and the generated high voltage is applied to the plug gap of the spark plug connected to the combustion chamber of the internal combustion engine 2.

  Then, the discharge between the plug gaps is generated by the high voltage applied to the plug gap, so that the air-fuel mixture compressed in the combustion chamber is ignited and burned. Due to the combustion of the air-fuel mixture, the air-fuel mixture expands and the piston is pushed down. When the piston is pushed down, the crankshaft connected to the piston rotates to generate power for rotating the wheel 9.

  The rotational speed of the crankshaft, that is, the rotational speed of the internal combustion engine 2 is basically higher as the amount of air-fuel mixture taken into the combustion chamber is larger. The amount of the air-fuel mixture taken into the combustion chamber is adjusted by a slot provided in an air-fuel mixture introduction pipe (also called an intake manifold) connected to the intake port of the internal combustion engine 2.

  The throttle adjusts the amount of the air-fuel mixture taken into the combustion chamber by adjusting the cross-sectional area (also referred to as throttle opening) of the introduction pipe. In the case of a motorcycle, the throttle opening can be adjusted by operating the accelerator grip.

  The larger the throttle opening, the greater the amount of air-fuel mixture. Therefore, the rotational speed of the internal combustion engine 2 increases as the throttle opening increases, and decreases as the throttle opening decreases.

(Motor generator 3)
Next, the motor generator 3 will be described in detail. The motor generator 3 is connected to the internal combustion engine 2. For example, the motor generator 3 is directly connected to the internal combustion engine 2 so that the rotation shaft thereof is positioned coaxially with the crankshaft of the internal combustion engine 2. The motor generator 3 may be connected to the internal combustion engine 2 via an indirect mechanism such as a gear box.

  The motor generator 3 is connected to a secondary battery such as a lithium ion battery, for example. A starter relay that is turned on when the starter switch is pressed is connected between the motor generator 3 and the secondary battery.

  Further, an ignition switch that is a main switch of the vehicle is connected between the starter switch and the secondary battery. The ignition switch connects or disconnects the starter switch and the secondary battery by an on / off operation by a key operation, for example.

  The motor generator 3 has a function as a generator that generates electric power by rotating in synchronization with the rotation of the internal combustion engine 2 and accumulates the generated electric power in a secondary battery.

  The motor generator 3 also functions as an electric motor that drives the internal combustion engine 2 by rotating with the electric power stored in the secondary battery and transmitting torque generated by the rotation to the internal combustion engine 2 connected to the motor generator 3. Have.

  For example, when the ignition switch is turned on and the starter relay is turned on by depressing the starter switch from the stop state of the internal combustion engine 2 in the off state of the ignition switch, power is supplied from the secondary battery to the motor generator 3. . By supplying electric power, the motor generator 3 as an electric motor rotates, and torque due to the rotation is applied to the internal combustion engine 2.

  Thereby, the air-fuel mixture can be taken into the combustion chamber by moving the piston of the internal combustion engine 2. Then, the internal combustion engine 2 can be started by burning the air-fuel mixture taken into the combustion chamber by ignition with a spark plug.

  Note that, when the internal combustion engine 2 is stopped in an idling stop state, which will be described later, the ignition switch is on. Since the ignition switch is on, the motor generator 3 can be rotated by turning on the starter switch without requiring the ignition switch to be turned on. The internal combustion engine 2 can be started by burning the air-fuel mixture taken into the combustion chamber by ignition with a spark plug.

  Such driving of the internal combustion engine 2 using the torque of the motor generator 3 is also called cell start. As described above, by directly connecting the motor generator 3 to the internal combustion engine 2, the internal combustion engine 2 can be driven with high efficiency and low noise.

(Control unit 4)
Next, the control unit 4 will be described in detail. The control unit 4 is included in an ECU (Engine Control Unit) that brakes the vehicle by electronic control. The vehicle control device 10 including the control unit 4 and the storage unit 5 is an ECU or a part thereof. The control unit 4 performs various electronic controls necessary for driving the internal combustion engine 2, for example, control of ignition of the air-fuel mixture by transmitting the control signal A to the ignition device 8 described above, and a command for fuel injection to the fuel injector. The internal combustion engine 2 is driven by executing fuel injection control by signal transmission, throttle opening control in accordance with throttle operation, and the like.

  Further, the control unit 4 detects that the starter switch is turned on and the throttle is opened when the internal combustion engine 2 is started using the torque of the motor generator 3 described above, that is, when the cell is started. Then, the internal combustion engine 2 is started by controlling the ignition of the air-fuel mixture and the control of fuel injection as described above.

  The control unit 4 is configured to execute idling stop control for temporarily stopping the internal combustion engine 2. For example, the control unit 4 performs idling stop control by not transmitting the control signal A to the ignition device 8.

  Here, the control unit 4 executes the first idling stop control after the startup of the internal combustion engine 2 with the ignition switch being turned on and the second and subsequent idling stop controls when different execution conditions are satisfied. Hereinafter, the start-up of the internal combustion engine 2 accompanied by the ON operation of the ignition switch is simply referred to as “start-up of the internal combustion engine 2”.

  Specifically, the control unit 4 has not yet performed idling stop control after the internal combustion engine 2 is started when a closed throttle operation for reducing the throttle opening to a reference opening or less is performed. In the case of 1 (hereinafter also referred to as “IS non-execution state”), the idling stop control is executed when the vehicle speed of the vehicle is equal to or higher than the first determination speed. That is, the control unit 4 executes the initial idling stop control on the condition that the vehicle speed is equal to or higher than the first determination speed.

  On the other hand, in the second case where the idling stop control has already been executed after the internal combustion engine 2 is started when the closed throttle operation is performed (hereinafter also referred to as “IS executed state”). ), The idling stop control is executed again when the vehicle speed is equal to or higher than the second determination speed higher than the first determination speed. That is, the control unit 4 executes the idling stop control for the second and subsequent times on the condition that the vehicle speed is equal to or higher than the second determination speed.

  As described above, the control unit 4 determines the second determination speed for determining whether or not the idling stop control for the second and subsequent times can be executed from the first determination speed for determining whether or not the first idling stop control can be executed. Even higher speed.

  Thereby, it is possible to provide a delay time before the start of the second and subsequent idling stop control. As a result, even if the time required for the first idling stop control is longer than the time required for the second and subsequent idling stops, the waiting time between the first execution and the second and subsequent executions of the idling stop is reduced. The difference can be suppressed.

  If the IS is not yet executed when the throttle is operated, the control unit 4 executes the idling stop control when the vehicle speed is equal to or higher than the first determination speed for the first determination time or longer. Also good. That is, the control unit 4 may execute the initial idling stop control on the condition that the vehicle speed is equal to or higher than the first determination speed for the first determination time or longer. Whether the duration is longer than the first determination time may be determined based on a timekeeping function of the control unit 4 such as a timer.

  In addition, when the control unit 4 is in the state where the IS has been executed at the time of the closed throttle operation, when the state where the vehicle speed is equal to or higher than the second determination speed continues for the second determination time longer than the first determination time, The idling stop control may be executed again. That is, the control unit 4 may execute the idling stop control for the second and subsequent times on the condition that the state where the vehicle speed is equal to or higher than the second determination speed continues for the second determination time or longer.

  As described above, the second determination time for determining whether or not to execute the idling stop control for the second and subsequent times is longer than the first determination time for determining whether or not to execute the first idling stop control. Thus, even if the time required for the first idling stop is longer than the time required for the second and subsequent idling stops, the difference in waiting time between the first execution of the idling stop and the second and subsequent executions Can be effectively suppressed.

  Moreover, the control part 4 detects whether the state of idling stop control is an IS non-execution state or an IS execution completion state based on the flag B which shows whether idling stop control was performed.

  In the example of FIG. 1, the flag B is stored in the storage unit 6 connected to the control unit 4. The control unit 4 reads the value of the flag B from the storage unit 5 and detects whether the state is the IS unexecuted state or the IS executed state based on the read value of the flag B.

  Further, the control unit 4 can set the value of the flag B in the storage unit 5 by a writing process to the storage unit 5. For example, the control unit 4 sets the value of the flag B when the ignition switch for turning on the internal combustion engine 2 is turned on, or when the ignition switch for turning off the internal combustion engine 2 is turned off. May be set to a value indicating an IS non-execution state (that is, reset). Further, the control unit 4 may set the value of the flag B to a value indicating the IS executed state when the idling stop control is executed.

  Based on the value of the flag B, the control unit 4 can easily and quickly determine whether the state is the IS unexecuted state or the IS executed state.

  As shown in FIG. 1, a vehicle speed sensor 6 for detecting the vehicle speed is connected to the control unit 4. The vehicle speed sensor 6 outputs, for example, a pulsed vehicle speed signal C for detecting the vehicle speed, that is, a vehicle speed pulse, to the control unit 4.

  The control unit 4 calculates (that is, detects) the vehicle speed based on the vehicle speed signal C from the vehicle speed sensor 6. And the control part 4 detects that a vehicle speed is more than a 1st determination speed or a 2nd determination speed based on the calculated vehicle speed.

  Further, as shown in FIG. 1, a throttle sensor 7 for detecting the throttle opening is connected to the control unit 4. The throttle sensor 7 outputs a throttle signal D for detecting the throttle opening to the control unit 4. The throttle sensor 7 may be, for example, an accelerator position sensor that outputs an electric signal (that is, a throttle signal D) corresponding to the movement of the accelerator grip to the ECU.

  The control unit 4 calculates the throttle opening based on the throttle signal D from the throttle sensor 7. And the control part 4 detects that open throttle operation or closed throttle operation was performed based on the calculated throttle opening.

(Operation example)
An operation example of the vehicle control system 1 having the above configuration will be described. FIG. 2 is a flowchart showing an operation example of the vehicle control system 1 according to the present embodiment. It is assumed that the internal combustion engine 2 is started in the initial state of FIG.

  First, the control unit 4 determines the presence or absence of a closed throttle operation based on the throttle opening calculated according to the throttle signal D from the throttle sensor 7 (step S1).

  When the closing throttle operation is performed (step S1: Yes), the control unit 4 determines whether or not the idling stop control has been executed after the internal combustion engine 2 is started based on the flag B stored in the storage unit 5. That is, it is determined whether the state is the IS unexecuted state or the IS performed state (step S2).

  When the IS is not executed (step S2: No), the control unit 4 is based on the vehicle speed calculated according to the vehicle speed signal C transmitted from the vehicle speed sensor 6 and the time measuring function of the control unit 4 such as a timer. Thus, it is determined whether or not the vehicle speed is equal to or higher than the first determination speed Vj1 and the duration of the vehicle speed equal to or higher than the first determination speed Vj1 is equal to or longer than the first determination time Tj1 (step S3).

  If the vehicle speed is equal to or higher than the first determination speed Vj1 and the duration is equal to or longer than the first determination time Tj1 (step S3: Yes), the control unit 4 executes the first idling stop control (step S5). In this case, the control unit 4 sets, that is, changes the value of the flag B in the storage unit 5 to a value indicating the IS execution completion state. On the other hand, when the vehicle speed is equal to or higher than the first determination speed Vj1 and the duration is not equal to or longer than the first determination time Tj1 (step S3: No), the control unit 4 determines that the vehicle speed is equal to or higher than the first determination speed Vj1 and the duration is first. The determination of whether or not the determination time is Tj1 or longer is repeated (step S3).

  On the other hand, when the IS is already executed (step S2: Yes), the control unit 4 continues the vehicle speed duration time of the second determination speed Vj2 or higher, which is higher than the first determination speed Vj1, and the second determination speed Vj2 or higher. It is determined whether it is the second determination time Tj2 or more (step S4). Here, the second determination time Tj2 is longer than the first determination time Tj1. The determination in this step is performed based on the vehicle speed calculated according to the vehicle speed signal C from the vehicle speed sensor 6 and the time measuring function of the control unit 4 such as a timer, as in step S3.

  When the vehicle speed is equal to or higher than the second determination speed Vj2 and the duration is equal to or longer than the second determination time Tj2 (step S4: Yes), the control unit 4 performs the second and subsequent idling stop control (step S5). On the other hand, when the vehicle speed is equal to or higher than the second determination speed Vj2 and the duration is not equal to or longer than the second determination time Tj2 (step S4: No), the controller 4 determines that the vehicle speed is equal to or higher than the second determination speed Vj2 and the duration is the second determination time. The determination of whether or not Tj2 or more is repeated (step S4).

  As described above, according to the present embodiment, the second determination speed for determining whether or not the second idling stop control can be executed is the second determination speed for determining whether or not the first idling stop control can be executed. The speed is higher than 1 judgment speed.

  As a result, a delay time can be set before the start of execution of the second and subsequent idling stops, so even if the time required for the first idling stop is longer than the time required for the second and subsequent idling stops. The difference in waiting time between the first execution and the second and subsequent executions can be suppressed.

  By suppressing the difference in waiting time between the first execution of the idling stop and the second and subsequent executions, the driver's uncomfortable feeling can be suppressed.

  Further, according to the present embodiment, the motor generator 3 connected to the internal combustion engine 2 is rotated by rotating the internal combustion engine 2 in order to execute the idling stop control after the vehicle speed has increased to the first determination speed or the second determination speed. Can sufficiently generate power.

  As a result, when restarting from the idling stop is performed by cell start using the power of the motor generator 3, the cell start can be more reliably performed using the electric power sufficiently accumulated in the secondary battery by the power generation of the motor generator 3. Can be done.

  In addition, in vehicles other than motorcycles such as automobiles, the present invention can also be applied to suppress a difference in waiting time between the first execution of idling stop and the second and subsequent executions. .

  The above-described embodiment is merely an example, and does not limit the scope of the invention. Various modifications can be made to the above-described embodiment without departing from the scope of the invention. The modified embodiments are included in the inventions described in the claims and their equivalents.

DESCRIPTION OF SYMBOLS 1 Vehicle control system, 2 Internal combustion engine, 4 Control part, 10 Vehicle control apparatus

Claims (8)

A vehicle control device having a control unit that executes idling stop control for temporarily stopping an internal combustion engine of a vehicle,
The controller is
In a first case where the idling stop control is not yet executed after the internal combustion engine is started when a closed throttle operation for reducing the throttle opening to a reference opening or less is performed, When the state where the vehicle speed is equal to or higher than the first determination speed continues for the first determination time or longer , the idling stop control is executed,
In the second case where the idling stop control has already been executed after the internal combustion engine is started when the closed throttle operation is performed, the second determination speed is higher than the first determination speed. The idling stop control is executed again when the above state continues for a second determination time longer than the first determination time . The controller is
The vehicle control device according to claim 1, wherein the first case or the second case is detected based on a flag indicating whether or not the idling stop control has been executed. The controller is
2. The vehicle control device according to claim 1, wherein the idling stop control is executed by not transmitting a control signal instructing ignition to an ignition device that ignites an ignition plug of the internal combustion engine. 3.   The vehicle control device according to claim 1, wherein the rotational speed of the internal combustion engine decreases with a decrease in the throttle opening. An internal combustion engine of the vehicle;
A vehicle control system having a control unit that executes idling stop control for temporarily stopping the internal combustion engine,
The controller is
In a first case where the idling stop control is not yet executed after the internal combustion engine is started when a closed throttle operation for reducing the throttle opening to a reference opening or less is performed, When the state where the vehicle speed is equal to or higher than the first determination speed continues for the first determination time or longer , the idling stop control is executed,
In the second case where the idling stop control has already been executed after the internal combustion engine is started when the closed throttle operation is performed, the second determination speed is higher than the first determination speed. The vehicle control system is characterized in that the idling stop control is executed again when the above state continues for a second determination time longer than the first determination time . A vehicle speed sensor for detecting the vehicle speed;
The vehicle control system according to claim 5 , wherein the control unit detects that the vehicle speed is equal to or higher than the first determination speed or equal to or higher than the second determination speed based on the detected vehicle speed. . A throttle sensor for detecting the throttle opening;
The vehicle control system according to claim 5 , wherein the control unit detects that the closed throttle operation has been performed based on the detected opening of the throttle. A control method for a vehicle control device for executing idling stop control for temporarily stopping an internal combustion engine of a vehicle,
In a first case where the idling stop control is not yet executed after the internal combustion engine is started when a closed throttle operation for reducing the throttle opening to a reference opening or less is performed, When the state where the vehicle speed is equal to or higher than the first determination speed continues for the first determination time or longer , the idling stop control is executed,
In the second case where the idling stop control has already been executed after the internal combustion engine is started when the closed throttle operation is performed, the second determination speed is higher than the first determination speed. The control method for a vehicle control device, wherein the idling stop control is executed again when the above state continues for a second determination time longer than the first determination time .

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