JP6522784B2 - Vehicle control device, vehicle control system, and control method of vehicle control device - Google Patents

Description

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

  Conventionally, there is a vehicle provided with an idling stop function for automatically stopping an internal combustion engine when stopping due to waiting for a signal or the like in order to suppress waste of fuel (see Patent Document 1). There is also known a vehicle provided with a motor generator that assists the start of an internal combustion engine. Conventional idling stop is performed on the condition that the vehicle has stopped and the throttle has been closed.

JP, 2015-98861, A

  For the purpose of improving fuel consumption and the like, in recent years, it has been considered to execute idling stop while the vehicle is traveling.

  The operation shown in FIG. 5 below is assumed as a driving operation with 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 (TH open) by opening the throttle valve (hereinafter simply referred to as "throttle") at time t1 in the idling stop state, and the vehicle speed at time t2 immediately after start. Re-enter the idling stop state by closing the throttle at low speed (TH closed). In FIG. 5, the opening of the throttle is expressed as the rising 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 falling of the throttle signal.

  At re-entry to the idling stop state at time t2, a process of rapidly stopping the crankshaft of the internal combustion engine by reverse braking is activated.

  Then, at time t3 immediately after such reentry into the idling stop state, an attempt is made to immediately restart the internal combustion engine, and an operation to turn on the starter switch and an operation to open the throttle (hereinafter also referred to as restart operation) are performed. .

  However, since stop processing of the crankshaft by the reverse rotation brake is activated at time t2, even if the restart operation is performed, the restart is not immediately executed until the processing is stopped, and the restart is performed. A delay time Td up to the time t4 occurs.

  In addition, since re-entry to the idling stop state immediately after starting is performed at a low speed state where the clutch is not connected to the wheels, restart from this idling stop state is a cell start using the power of the motor generator. There is a need to do. As cell start is required, additional delay time may occur.

  Then, this invention aims at providing the control method of a vehicle control apparatus, a vehicle control system, and a vehicle control apparatus which can perform restart from an idling stop state rapidly.

A vehicle control device according to one aspect of the present invention is
A vehicle control apparatus for controlling a vehicle having a motor generator connected to an internal combustion engine and capable of applying torque, and a clutch connectable to the internal combustion engine and a wheel,
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,
The control unit
After the idling stop control is performed, an open throttle operation is performed such that the throttle opening degree is equal to or more than the first reference opening degree, and when the vehicle speed is equal to or more than the first threshold speed, the wheel is moved from the wheel via the clutch. In a state where the internal combustion engine is rotationally driven by using the rotational force transmitted to the internal combustion engine, restart control without using torque by the motor generator is performed.

In the vehicle control device,
The control unit
When the vehicle speed of the vehicle becomes equal to or higher than a second threshold speed higher than the first threshold speed after the internal combustion engine is started from the idling stop state, the state where the vehicle speed is equal to or higher than the second threshold speed is The internal combustion engine is in the idling stop state when the first closing throttle operation is performed for one threshold time period and the opening degree of the throttle is not more than the second reference opening degree smaller than the first reference opening degree. The idling stop control may be performed.

In the vehicle control device,
The control unit
If the vehicle speed does not reach the second threshold speed after the start from the idling stop state, a second closing throttle operation is performed in which the opening degree of the throttle is equal to or less than the second reference opening degree. In addition, the idling stop control may be performed when a state in which the vehicle speed is equal to or less than a third threshold speed lower than the first threshold speed continues from the time of the second close throttle operation for a second threshold time.

In the vehicle control device,
The control unit
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 the first threshold speed or more, the second threshold speed or more, or the third threshold speed or less. .

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

In the vehicle control device,
The control unit
Based on the opening degree of the throttle detected by the throttle sensor for detecting the opening degree of the throttle, it is detected that the open throttle operation, the first close throttle operation or the second close throttle operation is performed. May be

In the vehicle control device,
The control unit
The idling stop control may be performed by not transmitting a control signal instructing ignition to an ignition device for igniting a spark plug of the internal combustion engine.

In the vehicle control device,
The rotational speed of the internal combustion engine may decrease according to the decrease of the opening of the throttle.

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 is
A vehicle control system comprising: a motor generator connected to an internal combustion engine capable of applying torque; and a clutch connectable to the internal combustion engine and a wheel,
The vehicle control device further includes 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.
The control unit
After the idling stop control is performed, an open throttle operation is performed such that the throttle opening degree is equal to or more than the first reference opening degree, and when the vehicle speed is equal to or more than the first threshold speed, the wheel is moved from the wheel via the clutch. In a state where the internal combustion engine is rotationally driven by using the rotational force transmitted to the internal combustion engine, restart control without using torque by the motor generator is performed.

A vehicle control method according to an aspect of the present invention is
A vehicle control method for controlling a vehicle having a motor generator connected to an internal combustion engine and capable of applying a torque, and a clutch capable of connecting the internal combustion engine and a wheel,
After the idling stop control for temporarily stopping the internal combustion engine, an open throttle operation is performed such that the opening degree of the throttle is equal to or more than the first reference opening degree, and the vehicle speed is equal to or more than the first threshold speed. In a state where the internal combustion engine is rotationally driven using a rotational force transmitted from the wheel to the internal combustion engine via a clutch, restart control using no torque by the motor generator is performed.

A vehicle control device according to an aspect of the present invention is a vehicle control device for controlling a vehicle having a motor generator connected to an internal combustion engine and capable of applying torque, and a clutch capable of connecting an internal combustion engine and a wheel. 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 opening degree of the throttle is equal to or more than the first reference opening degree, and when the vehicle speed is equal to or more than the first threshold speed, via the clutch. 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 the torque by the motor generator is executed.
As described above, according to the present invention, the restart control 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 through the clutch without using the torque by the motor generator. Can be done quickly.

It is a block diagram showing a vehicle control system concerning this embodiment. It is a flowchart which shows the operation example of the vehicle control system which concerns on this embodiment. In an operation example of a vehicle control system concerning this embodiment, it is a timing chart which shows an example of cruise IS control and restart control. In a vehicle control system concerning this embodiment, it is a timing chart which shows an example of idle IS control and restart control. It is a timing chart which shows an example of idling stop control and restart control by conventional technology.

  Hereinafter, embodiments according to the present invention will be described with reference to the drawings. The embodiments described below do not limit the present invention.

  The vehicle control system 1 of the present embodiment shown in FIG. 1 is, for example, 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 an internal combustion engine and a motor in combination as a power source.

  As shown in FIG. 1, a vehicle control system 1 includes a vehicle control device having an internal combustion engine 2, a motor generator 3, a clutch 4, and a control unit 5, a vehicle speed sensor 6, a rotational speed detection sensor 7, and a throttle. A sensor 8 and an igniter 9 are provided.

(Internal combustion engine 2)
The internal combustion engine 2 moves the piston, for example, to generate a negative pressure in the combustion chamber, thereby taking the mixture of the fuel injected from the fuel injector and the air into the combustion chamber. Then, the internal combustion engine 2 raises the temperature of the air-fuel mixture so that the air-fuel mixture can be easily burned by compressing the air-fuel mixture taken into the combustion chamber with a piston.

  The control unit 5 transmits to the igniter 9 a control signal A instructing the ignition of the air-fuel mixture 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 igniter 9 applies a current to the primary coil of an ignition coil including, for example, a primary coil and a secondary coil. A high voltage is generated in the secondary coil in response to the current flowing through 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 gaps, whereby the air-fuel mixture compressed in the combustion chamber is ignited and burned. The combustion of the mixture expands the mixture and depresses the piston. Depressing the piston rotates a crankshaft connected to the piston to generate power to rotate 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 air-fuel mixture introduced 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 mixture taken into the combustion chamber by adjusting the flow passage cross-sectional area of the introduction pipe, which is also called the throttle opening degree. In the case of a motorcycle, the throttle opening can be adjusted by operating the accelerator grip.

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

(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 located coaxially with the crankshaft of the internal combustion engine 2. Motor generator 3 may be connected to internal combustion engine 2 via an indirect mechanism such as a gear box.

  Further, the motor generator 3 is connected to, for example, a secondary battery such as a lithium ion battery. A starter relay, which is turned on in response to depression of the starter switch, 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 stores the generated electric power in a secondary battery.

  In addition, motor generator 3 also functions as a prime mover that drives internal combustion engine 2 by rotating with the power stored in the secondary battery and transmitting the torque by the rotation to internal combustion engine 2 connected to motor generator 3. Have.

  For example, in the stop state of the internal combustion engine 2, when the starter relay is turned on by the starter switch described above, electric power is supplied from the secondary battery to the motor generator 3. By supplying the electric power, the motor generator 3 as a prime mover is rotated, and torque due to the rotation is applied to the internal combustion engine 2.

  Thereby, the piston of the internal combustion engine 2 can be moved to take in the air-fuel mixture into the combustion chamber. Then, by burning the mixture taken into the combustion chamber by ignition by the spark plug, the drive of the internal combustion engine 2 can be started (that is, started).

  Starting of the internal combustion engine 2 using such 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.

(Clutch 4)
The clutch 4 is provided between the crankshaft of the internal combustion engine 2 and the wheel 10 (i.e., transmission). The clutch 4 can connect the internal combustion engine 2 and the wheel 10. The clutch 4 transmits or cuts off the power of the internal combustion engine 2 to the wheel 10 at the time of start, stop, shift, etc.

  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 connected to a hub of a rear wheel. The rotational force of the internal combustion engine 2 is transmitted to the driven pulley from a drive pulley on the side of the internal combustion engine 2 via a drive belt wound around both the driven pulley and the drive pulley.

  The automatic centrifugal clutch has, 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 rotational direction of the rear wheel.

  The clutch shoes are provided on the outer end surface of each clutch weight in the radial direction. The clutch spring is provided between the adjacent clutch weights, and has an elastic force in the direction in which the adjacent clutch weights are pulled. The clutch outer has a cylindrical inner wall surface or friction surface surrounding each clutch weight.

  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 has a diameter up to the position where the clutch shoe is pressed against the inner wall surface of the clutch outer. Move outward in the direction. Thus, 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 is reduced due to a stop or the like, the centrifugal force acting on the clutch weight is also reduced. As the centrifugal force decreases, the clutch shoe in contact with the clutch outer is pulled back radially inward with the clutch weight by the elastic force of the clutch spring, and transmission of power of the internal combustion engine 2 to the rear wheel is interrupted. Ru.

  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.

  Such a structure of the automatic centrifugal clutch makes it possible to reliably perform restart from idling stop control in a traveling state described later 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 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 device described above may be an ECU. The control unit 5 performs various types of electronic control necessary for driving the internal combustion engine 2, for example, control of ignition of air-fuel mixture by transmission of the control signal A to the igniter 9 described above, and command of fuel injection to the fuel injector The internal combustion engine 2 is driven by executing control of fuel injection by transmission of a signal, control of the throttle opening degree according to the throttle operation, and the like.

  In addition, upon start of internal combustion engine 2 using the torque of motor generator 3 described above, that is, cell start, control unit 5 detects that the starter switch is turned on and the throttle is opened. The internal combustion engine 2 is started by the control of the ignition of the air-fuel mixture and the control of the injection of fuel described above.

  Further, the control unit 5 is configured to execute idling stop control for temporarily stopping the internal combustion engine 2. For example, the control unit 5 executes 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 execution conditions specific to the present invention.

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

  In the cruise IS control, when the vehicle speed becomes equal to or higher than a second threshold speed higher than the first threshold speed after the internal combustion engine 2 starts from the idling stop state, the state where the vehicle speed is higher than the second threshold speed is the first threshold It is executed with the execution condition that the time is continued and the closing throttle operation (first closing throttle operation) is performed.

  The first threshold speed is a speed at which the connection between the internal combustion engine 2 and the wheel 10 by the clutch 4 is performed, for example, a speed at which the clutch shoe of the automatic centrifugal clutch is pressed by the clutch outer. Further, the closing throttle operation is a throttle operation in which the opening degree of the throttle is equal to or less than a second reference opening degree smaller than the first reference opening degree.

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

  By executing the cruise IS control, the idling stop state can be entered while the internal combustion engine 2 and the wheel 10 are connected by the clutch 4. Then, if the vehicle speed equal to or greater 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 time of restart.

  In this case, the internal combustion engine 2 continues to rotate by the rotational force transmitted from the wheel 10 to the internal combustion engine 2 via the clutch 4. Therefore, the internal combustion engine 2 can be restarted by burning the mixture taken into the combustion chamber by the ignition of the spark plug. That is, even if the internal combustion engine 2 is not driven to rotate by the motor generator 3, the internal combustion engine 2 can be restarted.

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

  On the other hand, idle IS control is idling stop control that can be performed when the vehicle is traveling or stopping at a relatively low speed at which 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 an idling stop control in an idling state.

  In the idle IS control, the closing throttle operation (second closing throttle operation) is performed when the vehicle speed does not reach the second threshold speed after the start from the idling stop state, and the vehicle speed from the closing throttle operation It is executed under the execution condition that the state where is less than the third threshold speed continues for the second threshold time.

  The third threshold velocity is a velocity less than the first threshold velocity. 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 required time from the closing 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 restart from the closing throttle operation is extended. It can be taken.

  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, so idling frequently in a high speed region where there is a high possibility of the driving operation to change the vehicle speed. It is possible to suppress the re-entry to the stop state.

  By executing the idle IS control, it is possible to prevent an immediate entering into the idling stop state by the closing throttle operation. As a result, when the open throttle operation is performed immediately after the closing throttle operation, the internal combustion engine 2 maintains the drive state, and there is no need to restart. Since the restart is not required, it is possible to prevent the driver from feeling uncomfortable due to the delay of the restart.

  The control unit 5 may execute idling stop control other than the cruise IS control and the idle IS control described above.

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

  In normal restart control including 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 on and open throttle operations of the starter switch. 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 restart control that does not use the torque of the motor generator 3, that is, restart control that does not rely on cell start, as restart control having execution conditions specific to the present invention.

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

  Here, the open throttle operation is a throttle operation in which the opening degree of the throttle is made equal to or more than the first reference opening degree. Further, as described above, the first threshold speed is a speed at which the connection between the internal combustion engine 2 and the wheel 10 by the clutch 4 is performed.

  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, so the internal combustion engine is transmitted 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 burned by the ignition of the spark plug, the internal combustion engine 2 can be restarted without rotating the internal combustion engine 2 by the motor generator 3.

  By performing restart control not based on such a cell start, restart from the idling stop state can be performed quickly. In addition, since the restart can be performed quickly, it is possible to prevent the driver from feeling uncomfortable due to the delay in the restart.

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

  Control unit 5 calculates or detects the vehicle speed based on vehicle speed signal B from vehicle speed sensor 6. Then, based on the calculated vehicle speed, 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 lower than the third threshold speed.

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

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

  Further, as shown in FIG. 1, a throttle sensor 8 for detecting the throttle opening degree is connected to the control unit 5. The throttle sensor 8 outputs a throttle signal D for detecting the throttle opening degree 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) according to the movement of the accelerator grip to the ECU.

  The controller 5 calculates or detects the throttle opening based on the throttle signal D from the throttle sensor 8. Then, the control unit 5 detects that the open throttle operation or the close throttle operation has been performed based on the calculated throttle opening degree.

(Operation example)
An operation example of the vehicle control system 1 having the above configuration will be described using the flowchart of FIG. 2. In the initial state of FIG. 2, the vehicle is in the idling stop state.

  First, based on the rotational speed of motor generator 3 calculated according to rotational speed signal C from motor generator 3, control unit 5 determines the presence or absence of start of internal combustion engine 2, that is, the presence or absence of an open throttle operation (step S1).

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

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

  When the continuation time 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 degree calculated according to the throttle signal D. It is determined whether there is a throttle operation (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 the first threshold time Th1 has been reached. Repeat (step S3).

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

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

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

  When the open 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 / 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). Since the restart control in this case does not assume that the starter switch is on (step S13: Yes), it is restart control not based on cell start.

  On the other hand, when the vehicle speed is less than the first threshold speed Vth1 (step S7: No), the control unit 5 turns on the starter switch (step S13: Yes) and a cell having the open throttle operation (step S14: Yes) as a condition. Restart control of the internal combustion engine 2 by start is performed (step S8). When transitioning from idling stop (step S5) in the traveling state to restart control by cell start, since the presence or absence of the open throttle operation has already been determined in step S6, the determination of the presence or absence of the open throttle operation in step S14 is 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 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 according to the vehicle speed signal B becomes equal to or higher than the second threshold speed Vth2. Ascends (step S2: Yes). In FIG. 3, the open throttle operation is shown as the rising of the throttle signal D.

  Then, at time t2 in FIG. 3 in which the vehicle speed VS above the second threshold speed Vth2 continues for the first threshold time Th1 or more, the closing throttle operation (TH closing) is performed (step S3: Yes, step S4: Yes). In FIG. 3, the closing throttle operation is shown as falling of the throttle signal D.

  At time t2 in FIG. 3, the internal combustion engine 2 is in operation, the vehicle speed is Vth2 or more, the continuation time is Tth1, and the closing throttle operation is performed, thereby performing the cruise IS control (step S5). The condition is met. Thereby, the control unit 5 starts the execution of the cruise IS control (step S5) at time t2 in FIG. Note that Tis in FIG. 3 is a cruise IS control execution period.

  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, the internal combustion engine 2 is in the idling stop state by the cruise IS control, the vehicle speed is at least Vth1, and the open throttle operation is performed, thereby performing restart control independent of cell start. The condition is met.

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

  When execution conditions for restart control not based on cell start are satisfied, the control unit 5 ends the cruise IS control at time t3 in FIG. 3 and executes restart control not based on cell start.

  As shown in FIG. 5, in the prior art, when re-entering the idling stop state immediately after the start from the idling stop state, stop processing of the crankshaft by the reverse brake is triggered. Then, until the stop processing of the crankshaft by the reverse brake is completed, even if the restart operation is performed, the restart is not performed immediately 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 wheels 10 are clutch 4 until the time of restart without performing the stop process of the crank by the reverse brake. You can maintain the connected state with Since internal combustion engine 2 and wheel 10 are connected, restart control can be performed without requiring a cell start by resuming control of ignition of the air-fuel mixture and the like by transmission of control signal A to ignition device 9. Since restart control independent of cell start can be performed, restart from the idling stop state can be performed quickly. In addition, it is possible to prevent the driver from feeling uncomfortable due to the delay in 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 The process 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 controller 5 performs the closing throttle operation based on the throttle opening degree 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 the vehicle speed is equal to or less 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 closing throttle operation is not performed (step S9: No), the control unit 5 repeats the determination of the presence or absence of the closing throttle operation (step S9).

  If the vehicle speed is less than or equal to the third threshold speed Vth3 (step S10: Yes), the control unit 5 determines that the third threshold speed Vth3 or less based on the vehicle speed calculated according to the vehicle speed signal B and the timing function of the control unit 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 the third threshold speed Vth3 or less (step S10: No), the control unit 5 repeats the determination whether the vehicle speed is the third threshold speed Vth1 or less (step S10).

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

  After executing the idle IS control, the control unit 5 determines whether 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 the open throttle operation based on the throttle opening degree 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 as to whether the starter switch is turned on (step S13).

  When the open throttle operation is performed (step S14: Yes), the control unit 5 performs restart control by cell start (step S8). On the other hand, when the open throttle operation has not been performed (step S14: No), the control unit 5 repeats the determination as to whether or not the open 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 open throttle operation (TH open) 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, at time t2, the closing throttle operation (TH closing) is performed (step S9: Yes). At this time, the vehicle speed VS is equal to or less 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 in operation, the vehicle speed is Vth3 or less, the continuation time is Tth2, and the closing throttle operation is performed, whereby the execution condition of the idle IS control (step S12) is satisfied. Do. Thereby, the control unit 5 starts the execution of the idle IS control (step S12) at time t3. Note that Tis in FIG. 4 is an execution period of the idle IS control.

  After 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 open) 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, whereby the condition for executing the restart control by the cell start is satisfied. Thus, the control unit 5 ends the idle IS control at time t4 and executes restart control by cell start.

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

  As described above, a vehicle control system according to an aspect of the present invention includes a vehicle having an internal combustion engine, a motor generator connected to the internal combustion engine and capable of applying torque, and a clutch capable of connecting the internal combustion engine and a wheel. The control system includes 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. Then, after performing the idling stop control, the control unit performs an open throttle operation in which the opening degree of the throttle is equal to or more than the first reference opening degree, and when the vehicle speed is equal to or more than the first threshold speed, via the clutch. 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 the torque by the motor generator is executed.

  Thus, by performing restart control using no torque by the motor generator, restart from the idling stop state can be performed quickly.

  The present invention can also be applied to quickly restart a vehicle other than a motorcycle such as a four-wheeled motor vehicle.

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

1 vehicle control system 2 internal combustion engine 3 motor generator 4 clutch 5 controller

Claims (11)

A vehicle control apparatus for controlling a vehicle having a motor generator connected to an internal combustion engine and capable of applying torque, and a clutch connectable to the internal combustion engine and a wheel,
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,
The control unit
When the vehicle speed of the vehicle becomes equal to or higher than a second threshold speed higher than the first threshold speed after the internal combustion engine is started from the idling stop state, the state where the vehicle speed is equal to or higher than the second threshold speed is The internal combustion engine is brought into the idling stop state when the first closing throttle operation is performed for one threshold time and the throttle opening degree is less than the second reference opening degree smaller than the first reference opening degree. Execute idling stop control,
After pre-Symbol idling stop control, the open throttle operation the throttle opening becomes equal to or larger than the first reference opening is performed, when the vehicle speed is the first threshold speed above through the clutch Vehicle control apparatus characterized by executing restart control using no torque by the motor generator while the internal combustion engine is rotationally driven by using rotational force transmitted from the wheel to the internal combustion engine . The control unit
If the vehicle speed does not reach the second threshold speed after the start from the idling stop state, a second closing throttle operation is performed in which the opening degree of the throttle is equal to or less than the second reference opening degree. And, the idling stop control is executed when a state where the vehicle speed is equal to or less than a third threshold speed lower than the first threshold speed continues from the time of the second close throttle operation for a second threshold time. The vehicle control device according to claim 1 . The control unit
Based on the vehicle speed detected by the vehicle speed sensor for detecting the vehicle speed, it is detected that the vehicle speed is the first threshold speed or more, the second threshold speed or more, or the third threshold speed or less. The vehicle control device according to claim 2 . The control unit
The vehicle control device according to claim 1 , wherein the start of the internal combustion engine is detected based on a rotational speed detected by a rotational speed detection sensor for detecting a rotational speed of the motor generator. The control unit
Based on the opening degree of the throttle detected by the throttle sensor for detecting the opening degree of the throttle, it is detected that the open throttle operation, the first close throttle operation or the second close throttle operation is performed. The vehicle control device according to claim 2 , characterized in that: The control unit
Wherein by not transmitting a control signal for instructing the ignition with respect to the ignition device for igniting the spark plug of an internal combustion engine, the vehicle control apparatus according to claim 1, characterized in that performing the idling stop control. Rotational speed of the internal combustion engine, the vehicle control apparatus according to claim 1, characterized in that reduced according to the decrease of the throttle opening. The vehicle control device according to claim 1 , wherein the first threshold time is shorter than the second threshold time. The vehicle control device according to claim 1 , wherein the first threshold time is longer than the second threshold time. A vehicle control system comprising: a motor generator connected to an internal combustion engine capable of applying torque; and a clutch connectable to the internal combustion engine and a wheel,
The vehicle control device further includes 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.
The control unit
If the vehicle speed of the vehicle becomes equal to or higher than a second threshold speed higher than the first threshold speed after the internal combustion engine is started from the idling stop state, the state where the vehicle speed is equal to or higher than the second threshold speed is The idling is performed to bring the internal combustion engine into the idling stop state when the first closing throttle operation is performed for which the threshold time continues and the throttle opening becomes equal to or less than the second reference opening smaller than the first reference opening. Execute stop control,
Wherein after the idling stop control, the throttle opening degree becomes equal to or larger than the first reference opening open throttle operation is performed, when the vehicle speed is the first threshold speed above through the clutch A vehicle control system characterized by executing restart control using no torque by the motor generator while the internal combustion engine is rotationally driven by using a rotational force transmitted from the wheel to the internal combustion engine. A control method of a vehicle control device for controlling a vehicle having a motor generator connected to an internal combustion engine and capable of applying torque, and a clutch capable of connecting the internal combustion engine and a wheel,
When the vehicle speed of the vehicle becomes equal to or higher than a second threshold speed higher than the first threshold speed after the internal combustion engine is started from the idling stop state, the state where the vehicle speed is equal to or higher than the second threshold speed is The internal combustion engine is brought into the idling stop state when the first closing throttle operation is performed for one threshold time and the throttle opening degree is less than the second reference opening degree smaller than the first reference opening degree. Perform idling stop control,
Wherein after the idling stop control, the throttle opening degree becomes equal to or larger than the first reference opening open throttle operation is performed, when the vehicle speed is the first threshold speed above through the clutch A vehicle control system characterized by performing restart control using no torque by the motor generator while the internal combustion engine is rotationally driven by using a rotational force transmitted from the wheel to the internal combustion engine. Control method.

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