JPWO2018016092A1 - VEHICLE CONTROL DEVICE, VEHICLE CONTROL SYSTEM, AND CONTROL METHOD FOR VEHICLE CONTROL DEVICE - Google Patents

Abstract

A control unit capable of executing idling stop control for temporarily stopping the internal combustion engine and start control for starting the internal combustion engine from the idling stop state is provided, and the control unit performs the opening degree of the throttle after performing the idling stop control. When the open throttle operation is performed so that is greater than or equal to the first reference opening and the vehicle speed is greater than or equal to the first threshold speed, the internal combustion engine is rotationally driven using the rotational force transmitted from the wheels to the internal combustion engine via the clutch. In this state, restart control without using torque by the motor generator is executed.

Description

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

  2. Description of the Related Art Conventionally, there is a vehicle provided with an idling stop function that automatically stops an internal combustion engine when stopping due to a signal or the like in order to suppress waste of fuel (see Patent Document 1). A vehicle including a motor generator that assists in starting the internal combustion engine is also known. The conventional idling stop is performed on the condition that the vehicle stops and the throttle is closed.

Japanese Patent Laying-Open No. 2015-98861

  In order to improve fuel consumption, etc., in recent years, it has been studied to perform an idling stop while the vehicle is running.

  The following operation shown in FIG. 5 is assumed as a driving operation with an idling stop while the vehicle is traveling. FIG. 5 is a timing chart showing an example of idling stop control and restart control according to the prior art.

  In the example of FIG. 5, the internal combustion engine is started by opening a throttle valve (hereinafter simply referred to as “throttle”) at time t1 in an idling stop state (TH open), and the vehicle speed is increased at time t2 immediately after the start. Closes the throttle at a low speed, and re-enters the idling stop state (TH closed). In FIG. 5, the opening of the throttle is expressed as the rise of the throttle signal output from the throttle sensor that detects the opening of the throttle, and the closing of the throttle is expressed as the fall of the throttle signal.

  In the re-entry to the idling stop state at the time t2, a process for quickly stopping the crankshaft of the internal combustion engine by the reverse rotation brake is activated.

  Then, at time t3 immediately after re-entry into such an idling stop state, an operation to turn on the starter switch and an operation to open the throttle (hereinafter also referred to as a restart operation) are performed in order to immediately restart the internal combustion engine. .

  However, since the crankshaft stop process by the reverse brake is activated at time t2, even if a restart operation is performed until this process is stopped, restart is not immediately performed, and restart is performed. Delay time Td until time t4 is generated.

  In addition, since re-entry to the idling stop state immediately after the start is executed in a low speed state where the clutch is not connected to the wheel, restart from the idling stop state is performed by a cell start using the power of the motor generator. There is a need to do. Since cell start is necessary, there is a possibility that further delay time may occur.

  Accordingly, an object of the present invention is to provide a vehicle control device, a vehicle control system, and a control method for the vehicle control device that can quickly perform restart from an idling stop state.

A vehicle control device according to an aspect of the present invention includes:
A motor generator connected to an internal combustion engine and capable of applying torque, and a vehicle control device for controlling a vehicle having a clutch capable of connecting the internal combustion engine and wheels,
A control unit capable of executing idling stop control for temporarily stopping the internal combustion engine and start control for starting the internal combustion engine from an idling stop state;
The controller is
After performing the idling stop control, an open throttle operation is performed in which the throttle opening is equal to or higher than the first reference opening, and when the vehicle speed is equal to or higher than the first threshold speed, the wheels are released from the wheels via the clutch. In a state where the internal combustion engine is rotationally driven using the rotational force transmitted to the internal combustion engine, restart control without using torque by the motor generator is executed.

In the vehicle control device,
The controller is
After the internal combustion engine is started from the idling stop state, when the vehicle speed becomes equal to or higher than the second threshold speed higher than the first threshold speed, the state where the vehicle speed is equal to or higher than the second threshold speed is the first. When the first closed throttle operation is continued for one threshold time and the throttle opening is equal to or smaller than the second reference opening which is smaller than the first reference opening, the internal combustion engine is put into the idling stop state. The idling stop control may be executed.

In the vehicle control device,
The controller is
When the vehicle speed does not exceed the second threshold speed after starting from the idling stop state, a second closed throttle operation is performed in which the throttle opening is equal to or less than the second reference opening. In addition, the idling stop control may be executed when a state in which the vehicle speed is equal to or lower than a third threshold speed less than the first threshold speed continues for a second threshold time from the time of the second closed throttle operation.

In the vehicle control device,
The controller is
Based on the vehicle speed detected by the vehicle speed sensor for detecting the vehicle speed, it may be detected that the vehicle speed is not less than the first threshold speed, not less than the second threshold speed, or not more than the third threshold speed. .

In the vehicle control device,
The controller is
The start of the internal combustion engine may be detected based on a rotational speed detected by a rotational speed detection sensor for detecting the rotational speed of the motor generator.

In the vehicle control device,
The controller is
Based on the throttle opening detected by the throttle sensor for detecting the throttle opening, it is detected that the opening throttle operation, the first closing throttle operation, or the second closing throttle operation has been performed. May be.

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.

In the vehicle control device,
The first threshold time may be shorter than the second threshold time.

In the vehicle control device,
The first threshold time may be longer than the second threshold time.

A vehicle control system according to an aspect of the present invention includes:
A motor generator connected to an internal combustion engine and capable of applying torque, and a vehicle control system having a clutch capable of connecting the internal combustion engine and wheels,
A vehicle control device having a control unit capable of executing idling stop control for temporarily stopping the internal combustion engine and start control for starting the internal combustion engine from an idling stop state;
The controller is
After performing the idling stop control, an open throttle operation is performed in which the throttle opening is equal to or higher than the first reference opening, and when the vehicle speed is equal to or higher than the first threshold speed, the wheels are released from the wheels via the clutch. In a state where the internal combustion engine is rotationally driven using the rotational force transmitted to the internal combustion engine, restart control without using torque by the motor generator is executed.

A vehicle control method according to an aspect of the present invention includes:
A motor generator connected to an internal combustion engine and capable of applying torque, and a vehicle control method for controlling a vehicle having a clutch capable of connecting the internal combustion engine and wheels,
After performing idling stop control for temporarily stopping the internal combustion engine, an open throttle operation is performed in which the throttle opening is equal to or higher than the first reference opening, and when the vehicle speed is equal to or higher than the first threshold speed, Restart control without using torque by the motor generator is executed in a state where the internal combustion engine is rotationally driven using rotational force transmitted from the wheels to the internal combustion engine via a clutch.

A vehicle control device according to an aspect of the present invention is a vehicle control device that controls a vehicle having a motor generator that is connected to an internal combustion engine and can apply torque, and a clutch that can connect the internal combustion engine and wheels. A control unit capable of executing idling stop control for temporarily stopping the engine and start control for starting the internal combustion engine from the idling stop state is provided. Then, after performing the idling stop control, the control unit performs an open throttle operation in which the throttle opening is equal to or higher than the first reference opening, and when the vehicle speed is equal to or higher than the first threshold speed, In a state where the internal combustion engine is rotationally driven using the rotational force transmitted from the wheels to the internal combustion engine, restart control without using torque by the motor generator is executed.
Thus, according to the present invention, the restart from the idling stop state is performed by executing the restart control by the rotational force transmitted from the wheel to the internal combustion engine via the clutch without using the torque by the motor generator. Can be done quickly.

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. 4 is a timing chart showing an example of cruise IS control and restart control in an operation example of the vehicle control system according to the present embodiment. 5 is a timing chart showing an example of idle IS control and restart control in the vehicle control system according to the present embodiment. It is a timing chart which shows an example of idling stop control and restart control by a prior art.

  Embodiments according to the present invention will be described below with reference to the drawings. In addition, embodiment shown below does not limit this 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 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 an internal combustion engine 2, a motor generator 3, a clutch 4, a vehicle control device having a controller 5, a vehicle speed sensor 6, a rotational speed detection sensor 7, a throttle A sensor 8 and an ignition device 9 are provided.

(Internal combustion engine 2)
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 5 transmits a control signal A instructing ignition of the air-fuel mixture to the ignition device 9 at a predetermined timing according to the compression of the air-fuel mixture. In response to the transmission of the control signal A from the control unit 5, the ignition device 9 supplies a current to 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 10.

  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 the 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 of the introduction pipe, also called the throttle opening. 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)
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.

  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 a prime mover 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 starter relay is turned on by the above-described starter switch while the internal combustion engine 2 is stopped, electric power is supplied from the secondary battery to the motor generator 3. By supplying electric power, the motor generator 3 as a prime mover 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 air-fuel mixture taken into the combustion chamber is combusted by ignition with an ignition plug, so that the driving of the internal combustion engine 2 can be started (that is, started).

  Such a start of the internal combustion engine 2 using the torque of the motor generator 3 is also called a 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.

(Clutch 4)
The clutch 4 is provided between the crankshaft of the internal combustion engine 2 and the wheels 10 (that is, a transmission). The clutch 4 can connect the internal combustion engine 2 and the wheel 10. The clutch 4 transmits or interrupts the power of the internal combustion engine 2 to the wheels 10 at the time of starting, stopping, shifting, and the like.

  For example, the clutch 4 is an automatic centrifugal clutch. The automatic centrifugal clutch is incorporated in a driven pulley on the rear wheel side of the motorcycle and is connected to a hub of the rear wheel. The rotational force of the internal combustion engine 2 is transmitted to the driven pulley from a drive pulley on the internal combustion engine 2 side via a drive belt wound around both the driven pulley and the drive pulley.

  The automatic centrifugal clutch includes, for example, a clutch weight, a clutch shoe, a clutch spring, and a clutch outer. A plurality of clutch weights are provided adjacent to each other in the rotational direction of the rear wheel. The plurality of clutch weights have a substantially arc shape along the rotation direction of the rear wheel.

  The clutch shoe is provided on the radially outer end face of each clutch weight. The clutch spring is provided between adjacent clutch weights and has an elastic force in a direction of pulling adjacent clutch weights. The clutch outer has a cylindrical inner wall surface that surrounds each clutch weight, that is, a friction surface.

  The clutch weight rotates integrally with the driven pulley as the internal combustion engine 2 rotates. When the rotational speed of the internal combustion engine 2 is low, the clutch weight is restrained from moving radially outward by the elastic force of the clutch spring.

  On the other hand, when the rotational speed of the internal combustion engine 2 reaches the threshold value, the centrifugal force acting on the clutch weight overcomes the elastic force of the clutch spring, so that the clutch weight reaches the position where the clutch shoe is pressed against the inner wall surface of the clutch outer. Move outward in the direction. Thereby, the power of the internal combustion engine 2 is transmitted to the rear wheels via the clutch weight and the clutch outer.

  Thereafter, when the rotational speed of the internal combustion engine 2 decreases due to stopping or the like, the centrifugal force acting on the clutch weight also decreases. As the centrifugal force decreases, the clutch shoe that has been in contact with the clutch outer is pulled back inward in the radial direction together with the clutch weight by the elastic force of the clutch spring, and transmission of the power of the internal combustion engine 2 to the rear wheels is cut off. The

  According to the automatic centrifugal clutch, when the vehicle speed according to the rotational speed of the internal combustion engine 2 is sufficiently high, the internal combustion engine 2 and the wheel 10 (rear wheel) are connected even when the throttle is closed. Can do.

  With such a structure of the automatic centrifugal clutch, restart from idling stop control in a running state, which will be described later, can be reliably performed without using torque by the motor generator 3, that is, cell start. The clutch 4 may be a clutch other than the automatic centrifugal clutch as long as the same action as that of the automatic centrifugal clutch can be achieved.

(Control unit 5)
The control unit 5 is included in an ECU (Engine Control Unit) that brakes the vehicle by electronic control. The vehicle control apparatus described above may be an ECU. The control unit 5 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 9 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 5 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 the control of the ignition of the air-fuel mixture or the control of the fuel injection described above.

  The control unit 5 is configured to execute idling stop control that temporarily stops the internal combustion engine 2. For example, the control unit 5 performs idling stop control by not transmitting the control signal A to the ignition device 9.

  The control unit 5 according to the present embodiment can execute two idling stop controls of “cruise IS control” and “idle IS control” as idling stop control having an execution condition unique to the present invention.

  Here, the cruise IS control is an idling stop control that can be executed when the vehicle is traveling at a relatively high speed such that the connection state between the internal combustion engine 2 and the wheels 10 by the clutch 4 is maintained. In other words, the cruise IS control is idling stop control in the traveling state.

  In the cruise IS control, the state in which the vehicle speed is equal to or higher than the second threshold speed when the vehicle speed becomes equal to or higher than the second threshold speed higher than the first threshold speed after the internal combustion engine 2 is started from the idling stop state. It is executed as an execution condition that the operation continues for a time and the closed throttle operation (first closed throttle operation) is performed.

  The first threshold speed is a speed at which the internal combustion engine 2 and the wheel 10 are connected by the clutch 4, for example, a speed when the clutch shoe of the automatic centrifugal clutch is pressed against the clutch outer. The closed throttle operation is a throttle operation in which the throttle opening is set to be equal to or smaller than a second reference opening that is smaller than the first reference opening.

  The cruise IS control can be executed, for example, when the throttle is closed while traveling downhill.

  By executing the cruise IS control, it is possible to enter the idling stop state while the internal combustion engine 2 and the wheel 10 are connected by the clutch 4. If the vehicle speed equal to or higher than the first threshold speed is continued until the restart, the internal combustion engine 2 and the wheel 10 can be continuously connected by the clutch 4 even at the restart.

  In this case, the internal combustion engine 2 continues to rotate due to the rotational force transmitted from the wheel 10 to the internal combustion engine 2 via the clutch 4. For this reason, the internal combustion engine 2 can be restarted by burning the air-fuel mixture taken into the combustion chamber by ignition of the ignition plug. That is, the internal combustion engine 2 can be restarted without rotating the internal combustion engine 2 by the motor generator 3.

  As described above, by executing the cruise IS control, it is possible to easily establish a condition for restart control that does not require cell start, that is, restart control that does not use torque by the motor generator 3.

  On the other hand, the idle IS control is idling stop control that can be executed when the vehicle is traveling or stopped at a relatively low speed such that the connection between the internal combustion engine 2 and the wheel 10 by the clutch 4 is disconnected. In other words, the idle IS control is idling stop control in the idling state.

  In the idle IS control, the closed throttle operation (second closed throttle operation) is performed when the vehicle speed does not exceed the second threshold speed after the start from the idling stop state. Is executed as an execution condition that the state where is less than or equal to the third threshold speed continues for the second threshold time.

  The third threshold speed is a speed less than the first threshold speed. The second threshold time may be shorter or longer than the first threshold time.

  If the second threshold time is longer than the first threshold time, the time required from the closed throttle operation to the start of execution of the idle IS control becomes longer, so the period during which the vehicle speed can be increased without requiring a restart from the closed throttle operation is lengthened. Can take.

  If the first threshold time is longer than the second threshold time, the cruise IS control can be started after traveling at a high speed for a sufficient time. Therefore, the idling is frequently performed in a high speed range where there is a high possibility of a driving operation to change the vehicle speed. The re-entry to the stop state can be suppressed.

  By executing the idle IS control, it is possible to prevent the idling stop state from being immediately entered by the closed throttle operation. As a result, when the open throttle operation is performed immediately after the close throttle operation, the internal combustion engine 2 maintains the driving state, and therefore it is not necessary to restart. Since restart is not required, it is possible to prevent the driver from feeling uncomfortable due to a delay in restart.

  In addition, the control part 5 may perform idling stop control other than the above-mentioned cruise IS control and idle IS control.

  Further, the control unit 5 can execute restart control for restarting the internal combustion engine 2 that has entered (re-entered) again into the idling stop state by the idling stop control after starting from the idling stop state.

  In the normal restart control including the restart control from the idling stop state by the idle IS control, the control unit 5 restarts the internal combustion engine 2 after detecting the starter switch on and the open throttle operation. That is, in normal restart control, the control unit 5 restarts the internal combustion engine 2 by cell start.

  Here, the control unit 5 can execute a restart control that does not use the torque of the motor generator 3, that is, a restart control that does not depend on a cell start, as the restart control having an execution condition unique to the present invention.

  In the restart control not based on the cell start, after the idling stop control is performed, an open throttle operation is performed, and the vehicle speed is transmitted from the wheel 10 to the internal combustion engine 2 via the clutch 4 when the vehicle speed is equal to or higher than the first threshold speed. This is executed in a state in which the internal combustion engine 2 is rotationally driven using the rotational force generated.

  Here, the open throttle operation is a throttle operation in which the throttle opening is set to be equal to or greater than the first reference opening. Further, as described above, the first threshold speed is a speed at which the internal combustion engine 2 and the wheel 10 are connected by the clutch 4.

  When the vehicle speed is equal to or higher than the first threshold speed, the internal combustion engine 2 and the wheel 10 are connected by the clutch 4, and therefore the internal combustion engine is used by using the rotational force transmitted from the wheel 10 to the internal combustion engine 2 via the clutch 4. 2 can be rotated. Therefore, if the air-fuel mixture taken into the combustion chamber is combusted by ignition of the ignition plug, the internal combustion engine 2 can be restarted without rotating the internal combustion engine 2 with the motor generator 3.

  By executing the restart control that does not depend on the cell start, the restart from the idling stop state can be quickly performed. Further, since the restart can be performed quickly, it is possible to prevent the driver from feeling uncomfortable due to the delay of the restart.

  As shown in FIG. 1, a vehicle speed sensor 6 for detecting the vehicle speed is connected to the control unit 5. The vehicle speed sensor 6 outputs, for example, a pulsed vehicle speed signal B for detecting the vehicle speed, that is, a vehicle speed pulse, to the control unit 5.

  The controller 5 calculates or detects the vehicle speed based on the vehicle speed signal B from the vehicle speed sensor 6. Then, the control unit 5 detects that the vehicle speed is equal to or higher than the first threshold speed, equal to or higher than the second threshold speed, or equal to or lower than the third threshold speed based on the calculated vehicle speed.

  As shown in FIG. 1, the control unit 5 is connected to a rotation speed detection sensor 7 for detecting the rotation speed of the motor generator 3. The rotation speed detection sensor 7 outputs a rotation speed signal C for detecting the rotation speed of the motor generator 3 to the control unit 5. The rotational speed signal C is, for example, a pulse signal generated when a magnetic flux interlinked with a coil provided in a stator of the motor generator 3 among magnetic fluxes provided in a rotor of the motor generator 3 changes according to rotation. is there.

  The controller 5 calculates, that is, detects the rotational speed of the motor generator 3 based on the rotational speed signal C from the rotational speed detection sensor 7. Then, the control unit 5 detects the start of the internal combustion engine 2 based on the calculated rotation speed of the motor generator 3.

  Further, as shown in FIG. 1, a throttle sensor 8 for detecting the throttle opening is connected to the control unit 5. The throttle sensor 8 outputs a throttle signal D for detecting the throttle opening to the control unit 5. The throttle sensor 8 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 5 calculates or detects the throttle opening based on the throttle signal D from the throttle sensor 8. And the control part 5 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 with reference to the flowchart of FIG. In the initial state of FIG. 2, it is assumed that the vehicle is in an idling stop state.

  First, the control unit 5 determines whether or not the internal combustion engine 2 has been started, that is, whether or not an open throttle operation has been performed, based on the rotational speed of the motor generator 3 calculated according to the rotational speed signal C from the motor generator 3 (Step S1). S1).

  When the internal combustion engine 2 is started (step S1: Yes), the control unit 5 determines whether the vehicle speed is equal to or higher than the second threshold speed Vth2 based on the vehicle speed calculated according to the vehicle speed signal B from the vehicle speed sensor 6. Determine (step S2). On the other hand, when the internal combustion engine 2 has not been started (step S1: No), the control unit 5 repeats the determination of whether or not the internal combustion engine 2 has been started (step S1).

(1. Cruise IS control and restart control)
Hereinafter, a series of processes (S3 to S8, S13, S14) executed when the vehicle speed is equal to or higher than the second threshold speed Vth2 (step S2: Yes), that is, processes related to cruise IS control and restart control. I will explain it first.

  When the vehicle speed is equal to or higher than the second threshold speed Vth2 (step S2: Yes), the control unit 5 determines the second threshold value based on the vehicle speed calculated according to the vehicle speed signal B and the time measuring function of the control unit 5 such as a timer. It is determined whether the duration time of the vehicle speed equal to or higher than the speed Vth2 has reached the first threshold time Th1 (step S3).

  When the duration of the vehicle speed equal to or higher than the second threshold speed Vth2 reaches the first threshold time Th1 (step S3: Yes), the control unit 5 closes based on the throttle opening calculated according to the throttle signal D. The presence / absence of throttle operation is determined (step S4). On the other hand, when the duration of the vehicle speed equal to or higher than the second threshold speed Vth2 has not reached the first threshold time Th1 (step S3: No), the control unit 5 determines whether or not the first threshold time Th1 has been reached. Repeat (step S3).

  When the closed throttle operation is performed (step S4: Yes), the control unit 5 executes the cruise IS control (step S5).

  On the other hand, when the closed throttle operation is not performed (step S4: No), the control unit 5 repeats the determination of the presence or absence of the closed throttle operation (step S4).

  After executing the cruise IS control, the control unit 5 determines the presence or absence of an open throttle operation based on the throttle opening calculated according to the throttle signal D (step S6).

  When the opening throttle operation is performed (step S6: Yes), the control unit 5 determines whether the vehicle speed is equal to or higher than the first threshold speed Vth1 based on the vehicle speed calculated according to the vehicle speed signal B. (Step S7). On the other hand, when the open throttle operation is not performed (step S6: No), the control unit 5 repeats the determination of the presence or absence of the open throttle operation (step S6).

  When the vehicle speed is equal to or higher than the first threshold speed Vth1 (step S7: Yes), the control unit 5 performs restart control of the internal combustion engine 2 (step S8). The restart control in this case is a restart control that does not depend on the cell start because the starter switch is not turned on (step S13: Yes).

  On the other hand, when the vehicle speed is less than the first threshold speed Vth1 (step S7: No), the control unit 5 is a cell on condition that the starter switch is turned on (step S13: Yes) and the open throttle operation (step S14: Yes). The restart control of the internal combustion engine 2 by the start is performed (step S8). In addition, when shifting from the idling stop (step S5) in the running state to the restart control by the cell start, since the presence / absence of the open throttle operation has already been determined in step S6, the determination of the presence / absence of the open throttle operation in step S14 is performed. It may be omitted.

  FIG. 3 is a timing chart showing cruise IS control and restart control. FIG. 3 shows a specific application example of each step (S1 to S8) of FIG. 2 described above. In the example of FIG. 3, after the open throttle operation (TH opening) is performed at time t1 and the internal combustion engine 2 is started (step S1: Yes), the vehicle speed VS corresponding to the vehicle speed signal B becomes equal to or higher than the second threshold speed Vth2. It rises (step S2: Yes). In FIG. 3, the open throttle operation is shown as the rise of the throttle signal D.

  Then, at time t2 in FIG. 3 where the vehicle speed VS equal to or higher than the second threshold speed Vth2 continues for the first threshold time Th1 or more, a closing throttle operation (TH closing) is performed (step S3: Yes, step S4: Yes). In FIG. 3, the closed throttle operation is shown as the fall of the throttle signal D.

  At time t2 in FIG. 3, the cruise IS control (step S5) is executed when the internal combustion engine 2 is operating, the vehicle speed is equal to or higher than Vth2, the duration is Tth1, and the closed throttle operation is performed. The condition is met. Thereby, the control part 5 starts execution of cruise IS control (step S5) at the time t2 of FIG. Note that Tis in FIG. 3 is an execution period of cruise IS control.

  After execution of the cruise IS control is started, an open throttle operation (TH open) is performed at time t3 in FIG. 3 (step S6: Yes). At this time, the vehicle speed VS is equal to or higher than the first threshold speed Vth1 (step S7: Yes). At time t3 in FIG. 3, when the internal combustion engine 2 is in the idling stop state by the cruise IS control, the vehicle speed is Vth1 or more, and the open throttle operation is performed, the restart control that does not depend on the cell start is executed. The condition is met.

  In addition, you may judge that the internal combustion engine 2 is in the idling stop state by cruise IS control based on the state information which shows the idling stop state memorize | stored in the memory which is not shown in figure, for example. The state information may be recorded each time the control unit 5 executes the idling stop control.

  When the execution condition of the restart control not depending on the cell start is established, the control unit 5 ends the cruise IS control at time t3 in FIG. 3 and executes the restart control not depending on the cell start.

  As shown in FIG. 5, in the prior art, the crankshaft stop process by the reverse brake is activated when re-entering the idling stop state immediately after the start from the idling stop state. Then, until the crankshaft stop process by the reverse brake is completed, even if the restart operation is performed, the restart is not immediately performed, and a delay time occurs.

  On the other hand, according to the cruise IS control of the present embodiment, as shown in FIG. 3, the internal combustion engine 2 and the wheel 10 are connected to the clutch 4 until the restart without performing the crank stop process by the reverse brake. Can be kept connected. Since the internal combustion engine 2 and the wheel 10 are connected, restart control can be executed without requiring a cell start by resuming control of ignition of the air-fuel mixture by transmission of the control signal A to the ignition device 9. Since the restart control that does not depend on the cell start can be executed, the restart from the idling stop state can be quickly performed. In addition, it is possible to prevent the driver from feeling uncomfortable due to the delay of restart.

(2. Idle IS control and restart control)
Next, in FIG. 2, a series of processes (S9 to S14, S8) executed when the vehicle speed is less than the second threshold speed Vth2 (step S2: No), that is, related to idle IS control and restart control. Processing to be performed will be described.

  As shown in FIG. 2, when the vehicle speed is less than the second threshold speed Vth2 (step S2: No), the control unit 5 performs the closed throttle operation based on the throttle opening calculated according to the throttle signal D. The presence or absence is determined (step S9).

  When the closing throttle operation is performed (step S9: Yes), the control unit 5 determines whether or not the vehicle speed is equal to or lower than the third threshold speed Vth1 based on the vehicle speed calculated according to the vehicle speed signal B. (Step S10). On the other hand, when the closed throttle operation is not performed (step S9: No), the control unit 5 repeats the determination of the presence or absence of the closed throttle operation (step S9).

  When the vehicle speed is equal to or lower than the third threshold speed Vth3 (step S10: Yes), the controller 5 is equal to or lower than the third threshold speed Vth3 based on the vehicle speed calculated according to the vehicle speed signal B and the time measuring function of the controller 5. It is determined whether the duration of the vehicle speed has reached the second threshold time Th2 (step S11). On the other hand, when the vehicle speed is not equal to or lower than the third threshold speed Vth3 (step S10: No), the control unit 5 repeats the determination whether the vehicle speed is equal to or lower than the third threshold speed Vth1 (step S10).

  When the duration of the vehicle speed equal to or lower than the third threshold speed Vth3 has reached the second threshold time Th2 (step S11: Yes), the control unit 5 executes idle IS control (step S12).

  On the other hand, when the duration of the vehicle speed equal to or lower than the third threshold speed Vth3 has not reached the second threshold time Th2 (step S11: No), the control unit 5 determines whether or not the second threshold time Th2 has been reached. Repeat (step S11).

  After executing the idle IS control, the control unit 5 determines whether or not the starter switch is turned on (step S13).

  When the starter switch is turned on (step S13: Yes), the control unit 5 determines the presence / absence of an open throttle operation based on the throttle opening calculated according to the throttle signal D (step S14). On the other hand, when the starter switch is not turned on (step S13: No), the control unit 5 repeats the determination of whether or not the starter switch is turned on (step S13).

  When the opening throttle operation is performed (step S14: Yes), the control unit 5 performs the restart control by the cell start (step S8). On the other hand, when the opening throttle operation has not been performed (step S14: No), the control unit 5 repeats the determination of whether the opening throttle operation has been performed (step S14).

  FIG. 4 is a timing chart showing idle IS control and restart control. FIG. 4 shows a specific application example of each step (S9 to S14, S8) of FIG. 2 described above. In the example of FIG. 4, after the opening throttle operation (TH opening) is performed at time t1 and the internal combustion engine 2 is started (step S1: Yes), the vehicle speed VS is less than the second threshold speed Vth2 (step S2: No). While maintaining the state, a closing throttle operation (TH closing) is performed at time t2 (step S9: Yes). At this time, the vehicle speed VS is equal to or lower than the third threshold speed Vth3 (step S10: Yes).

  Thereafter, at time t3, the duration of the vehicle speed VS equal to or lower than the third threshold speed Vth3 reaches the second threshold time Th2 (step S11: Yes). At time t3, the internal combustion engine 2 is operating, the vehicle speed is equal to or lower than Vth3, the duration is Tth2, and the closed throttle operation is performed, thereby satisfying the execution condition of the idle IS control (step S12). To do. Thereby, the control part 5 starts execution of idle IS control (step S12) at the time t3. Note that Tis in FIG. 4 is an execution period of idle IS control.

  After the execution of the idle IS control is started, at time t4, the starter switch is turned on (step S13: Yes), and an open throttle operation (TH opening) is performed (step S14: Yes). At time t4, the internal combustion engine 2 is in the idling stop state by the idle IS control, the starter switch is turned on, and the open throttle operation is performed, thereby satisfying the execution condition of the restart control by the cell start. Thereby, the control part 5 complete | finishes idle IS control at the time t4, and performs restart control by a cell start.

  As shown in FIG. 4, the idle IS control is not immediately executed even when the closed throttle operation is performed at time t2 in FIG. 4, and the second threshold time Th2 has elapsed. Therefore, when the driver performs the closed throttle operation at time t2 in FIG. 4 and then performs the open throttle operation at a time within the second threshold time Tth2, the internal combustion engine 2 maintains the rotation state during that time. Yes. In this case, since the rotation state of the internal combustion engine 2 is maintained, it is not necessary to perform restart again. Since restart is not required, it is possible to prevent the driver from feeling uncomfortable due to a delay in restart.

  As described above, a vehicle control system according to an aspect of the present invention includes an internal combustion engine, a motor generator that is connected to the internal combustion engine and can apply torque, and a clutch that can connect the internal combustion engine and wheels. The control system includes a control unit capable of executing an idling stop control for temporarily stopping the internal combustion engine and a start control for starting the internal combustion engine from an idling stop state. Then, after performing the idling stop control, the control unit performs an open throttle operation in which the throttle opening is equal to or higher than the first reference opening, and when the vehicle speed is equal to or higher than the first threshold speed, In a state where the internal combustion engine is rotationally driven using the rotational force transmitted from the wheels to the internal combustion engine, restart control without using torque by the motor generator is executed.

  As described above, the restart from the idling stop state can be quickly performed by executing the restart control without using the torque by the motor generator.

  The present invention can also be applied to quickly restart a vehicle other than a motorcycle such as an automobile.

  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 3 Motor generator 4 Clutch 5 Control part

Claims (12)

A motor generator connected to an internal combustion engine and capable of applying torque, and a vehicle control device for controlling a vehicle having a clutch capable of connecting the internal combustion engine and wheels,
A control unit capable of executing idling stop control for temporarily stopping the internal combustion engine and start control for starting the internal combustion engine from an idling stop state;
The controller is
After performing the idling stop control, an open throttle operation is performed in which the throttle opening is equal to or higher than the first reference opening, and when the vehicle speed is equal to or higher than the first threshold speed, the wheels are released from the wheels via the clutch. A vehicle control device that performs restart control without using torque by the motor generator in a state where the internal combustion engine is rotationally driven using rotational force transmitted to the internal combustion engine. The controller is
After the internal combustion engine is started from the idling stop state, when the vehicle speed becomes equal to or higher than the second threshold speed higher than the first threshold speed, the state where the vehicle speed is equal to or higher than the second threshold speed is the first. When the first closed throttle operation is continued for one threshold time and the throttle opening is equal to or smaller than the second reference opening which is smaller than the first reference opening, the internal combustion engine is put into the idling stop state. The vehicle control device according to claim 1, wherein idling stop control is performed. The controller is
When the vehicle speed does not exceed the second threshold speed after starting from the idling stop state, a second closed throttle operation is performed in which the throttle opening is equal to or less than the second reference opening. In addition, the idling stop control is executed when a state in which the vehicle speed is equal to or lower than a third threshold speed less than the first threshold speed has continued for a second threshold time since the second closed throttle operation. The vehicle control device according to claim 2. The controller is
Based on a vehicle speed detected by a vehicle speed sensor for detecting the vehicle speed, it is detected that the vehicle speed is not less than the first threshold speed, not less than the second threshold speed, or not more than the third threshold speed. The vehicle control device according to claim 3. The controller is
The vehicle control device according to claim 2, wherein the start of the internal combustion engine is detected based on a rotation speed detected by a rotation speed detection sensor for detecting a rotation speed of the motor generator. The controller is
Based on the throttle opening detected by the throttle sensor for detecting the throttle opening, it is detected that the opening throttle operation, the first closing throttle operation, or the second closing throttle operation has been performed. The vehicle control device according to claim 3. The controller is
The vehicle control device according to claim 2, 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.   The vehicle control device according to claim 2, wherein the rotational speed of the internal combustion engine decreases with a decrease in the opening of the throttle.   The vehicle control device according to claim 2, wherein the first threshold time is shorter than the second threshold time.   The vehicle control device according to claim 2, wherein the first threshold time is longer than the second threshold time. A motor generator connected to an internal combustion engine and capable of applying torque, and a vehicle control system having a clutch capable of connecting the internal combustion engine and wheels,
A vehicle control device having a control unit capable of executing idling stop control for temporarily stopping the internal combustion engine and start control for starting the internal combustion engine from an idling stop state;
The controller is
After performing the idling stop control, an open throttle operation is performed in which the throttle opening is equal to or higher than the first reference opening, and when the vehicle speed is equal to or higher than the first threshold speed, the wheels are released from the wheels via the clutch. A vehicle control system that performs restart control without using torque by the motor generator in a state where the internal combustion engine is rotationally driven using rotational force transmitted to the internal combustion engine. A motor generator connected to an internal combustion engine capable of applying torque, and a control method for a vehicle control device for controlling a vehicle having a clutch capable of connecting the internal combustion engine and wheels,
After performing idling stop control for temporarily stopping the internal combustion engine, an open throttle operation is performed in which the throttle opening is equal to or higher than the first reference opening, and when the vehicle speed is equal to or higher than the first threshold speed, A restart control without using torque by the motor generator is performed in a state where the internal combustion engine is rotationally driven using a rotational force transmitted from the wheels to the internal combustion engine via a clutch. A control method for a vehicle control device.

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