JPH11289608A - Control device for hybrid vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a control device which can smoothly change the regenerative power amount, when a vehicle is decelerated by a method wherein, in a period up to the totally closed state of the throttle valve of an engine from the release of the operation of an acceletator, a generator motor generates electricity by the regenerative power generation amount according to the operating state of the engine. SOLUTION: In a control processing operation in a cruise regenerative mode, a unified control controller 11 decides the target regenerative power generation output of a generator motor by using a map or the like on the basis of the present electricity storage amount of an electricity storage device 5 in an electricity storage controller 10, on the basis of the speed of rotation NE of an engine and on the bases of a vehicle speed Vcar, and the output is instructed to a generator motor controller 8. In addition, the unified control controller 11 uses, as the target output of the engine 1, an output in which an output portion corresponding to the target regenerative power generator output of the generator motor 2 is added to a target vehicle propulsion output, and the target output is instructed to an engine controller 7. The engine controller 7 decides the valve travel of the throttle of the engine 1 so as to be instructed to an engine driving device 13.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a control device for a parallel type hybrid vehicle.

[0002]

2. Description of the Related Art A parallel type hybrid vehicle includes an engine as a main propulsion source of the vehicle, a generator motor capable of operating both a motor and a generator, a battery for transmitting and receiving electric power to and from the generator motor. A power storage device such as a capacitor is mounted. An auxiliary output (mechanical power) for assisting the engine output (vehicle propulsion) by supplying power to the generator motor from the power storage device as needed, such as when the vehicle is accelerating, and operating the generator motor as a motor. ) Is generated by a generator motor, or the generator motor is operated as a generator by kinetic energy at the time of deceleration of the vehicle, and the generated electric power is charged in a power storage device, thereby performing regenerative power generation of the generator motor. .

[0003] In this type of hybrid vehicle, the throttle valve (intake air control valve) of the engine is basically controlled in accordance with the accelerator operation by the driver.
For example, when the accelerator operation is released during running of the vehicle (when the accelerator operation amount is set to “0”), the throttle valve is closed. In this case, due to a response delay of the actuator that drives the throttle valve, the opening degree of the throttle valve does not instantaneously become the fully closed state from the time when the accelerator operation is released until the throttle valve becomes the fully closed state. Has a slight time lag.

On the other hand, in a conventional hybrid vehicle, regenerative power generation by a generator motor when the vehicle is decelerated usually takes a required time from the time when the throttle valve of the engine is fully closed in response to the release of the accelerator operation of the vehicle. The regenerative power generation is performed, and the energy of the generated regenerative power is charged in the power storage device. In this case, the regenerative power generation of the generator motor involves the braking force of the vehicle according to the amount of regenerative power generation (so-called regenerative braking), whereby the power storage device can be charged using the kinetic energy of the vehicle. At the same time, the vehicle is decelerated.

However, in such a conventional hybrid vehicle, the generator motor instantaneously starts generating power with a required regenerative power generation amount when the throttle valve is fully closed. As a result, braking force of the vehicle was suddenly generated, which caused discomfort to the driver.

In a conventional hybrid vehicle, the kinetic energy of the vehicle is only consumed by the engine brake during the period from when the accelerator operation of the vehicle is released to when the throttle valve of the engine is closed. However, there was a problem that the wasted wasted.

[0007]

SUMMARY OF THE INVENTION In view of this background, the present invention provides a regenerative power generation of a generator motor when a vehicle is decelerated.
It is an object of the present invention to provide a control device for a hybrid vehicle that can perform the operation smoothly without causing a sudden change in the braking force of the vehicle and can further increase the utilization efficiency of the kinetic energy of the vehicle.

[0008]

In order to achieve the above object, a control device for a hybrid vehicle according to the present invention uses an engine which is a propulsion source of the vehicle and an auxiliary output for assisting the output of the engine to power the electric storage device. A generator motor that performs an operation as a motor generated by using the generator and an operation as a generator that regenerates electric power for charging the power storage device, and controls an opening degree of a throttle valve of the engine according to an accelerator operation of a vehicle. A throttle valve control unit, which applies the kinetic energy of the vehicle to the generator motor while decelerating the vehicle in which the throttle valve is fully closed by the throttle valve control unit in response to the release of the accelerator operation. In a control device for a hybrid vehicle that performs regenerative power generation of an electric motor, after the accelerator operation is released, the stop is operated in response to the release. A generator motor that causes the generator motor to generate electric power by a regenerative power generation amount corresponding to at least an operation state of the engine including an opening degree of the throttle valve during a period until the throttle valve is fully closed by the valve control means. A control means is provided.

According to the present invention, a period from when the accelerator operation is released to when the throttle valve of the engine is fully closed, that is, a period when the opening of the throttle valve decreases toward the fully closed state. In the above, the generator motor control means causes the generator motor to generate electric power based on the amount of regenerative electric power generated in accordance with the operating state of the engine including the opening degree of the throttle valve. It is possible to generate the electric power of the generator motor while changing the electric power. As a result, a sudden change in the braking force of the vehicle due to the regenerative power generation of the generator motor is also avoided. Also,
Not only in the fully closed state of the throttle valve, but also during the period until the throttle valve is fully closed, the kinetic energy of the vehicle in the period is converted into electric energy by the generator motor by performing regenerative power generation of the generator motor. To charge the power storage device.

Therefore, according to the present invention, the regenerative power generation of the generator motor when the vehicle is decelerated can be performed smoothly without causing a sudden change in the braking force of the vehicle, and the efficiency of using the kinetic energy of the vehicle can be improved. Can be enhanced.

In the present invention, more specifically, the generator motor control means calculates a regenerative power generation amount until the throttle valve is fully closed by a predetermined regenerative power when the throttle valve is fully closed. Control is performed so as to gradually increase with the decrease in the opening of the throttle valve toward the power generation amount.

According to this, after the accelerator operation of the vehicle is released, the regenerative power generation amount of the generator motor increases as the predetermined regenerative power generation amount (power generation in the fully closed state of the throttle valve) as the opening degree of the throttle valve decreases. Regenerative power generated by motor)
, The braking force of the vehicle accompanying the regenerative power generation of the generator motor gradually increases. Therefore, the vehicle can be smoothly decelerated with a comfortable driving feeling.

Further, in the present invention, the predetermined regenerative power generation amount in the fully closed state of the throttle valve is a regenerative power amount corresponding to an operation speed of the vehicle including a rotation speed of the engine or a rotation speed of the generator motor and a speed of the vehicle. The amount of power generated. According to this, the regenerative power generation of the generator motor when the throttle valve is finally fully closed at the time of deceleration of the vehicle depends on the rotation speed of the engine or the generator motor and the vehicle operating condition including the vehicle speed. Since the regenerative power generation is used, the braking force of the vehicle accompanying the regenerative power generation should be suitable for the running state of the vehicle (for example, the braking force by the regenerative power generation should be increased when the speed of the vehicle is high). it can.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described with reference to FIGS.

FIG. 1 schematically shows the overall system configuration of a hybrid vehicle equipped with a control device according to the present embodiment. In FIG. 1, reference numeral 1 denotes an engine, 2 denotes a generator motor, and 3 denotes a transmission including a clutch 4. Reference numeral 5 denotes a power storage device, 6 denotes a driving wheel for driving the vehicle, 7 denotes an engine controller, 8 denotes a generator motor controller, 9 denotes a transmission controller, 10 denotes a power storage device controller, and 11 denotes a general management controller.

The engine 1 is a main propulsion source of the vehicle, and the output of the engine 1 is transmitted from an output shaft (crankshaft) (not shown) to the drive wheels 6 via the generator motor 2 and the transmission 3 to drive the vehicle. .

The engine 1 includes an engine speed NE, an intake pressure PB, an engine temperature TW, and an opening θth of a throttle valve (intake control valve) (not shown) (hereinafter referred to as a throttle opening θth). 1 (hereinafter referred to as E / G sensor 12)
Is attached. Data detected by the E / G sensor 12, such as the rotational speed NE, is given to the engine controller 7.

Further, the engine 1 has a drive mechanism for operating the engine 1, an ignition device 13 a for igniting a mixture of fuel and air supplied to the engine 1, and a fuel supply device for supplying fuel to the engine 1. 13b, a throttle actuator 13c for driving a throttle valve is provided. Hereinafter, these drive mechanisms 13a to 13c are collectively referred to as an engine drive device 13.

The generator motor 2 has its rotor (not shown) coaxially connected to the output shaft of the engine 1, and the armature coil (not shown) of the generator motor 2 comprises a regulator / inverter circuit and the like. It is electrically connected to the power storage device 5 via an energization control circuit 14 (hereinafter, referred to as a PDU 14).

The generator motor 2 uses an electric power stored in the power storage device 5 as an energy source to assist the output of the engine 1 with an auxiliary output (drive wheels 6 together with the output of the engine 1).
(Hereinafter, referred to as an assist operation) that generates an auxiliary vehicle propulsion transmitted to the vehicle (hereinafter referred to as an assist operation), and a part of the kinetic energy transmitted from the drive wheels 6 and a part of the output of the engine 1 when the vehicle decelerates. An operation as a generator (hereinafter, referred to as a regenerative operation) for generating (regenerating) electric power for charging the power storage device 5 as a power source is selectively performed, and each operation is performed between the power storage device 5 and the power storage device 5. The power transfer is performed by controlling the power transfer via the PDU 14.

A detecting device 15 (hereinafter, referred to as a G / M sensor 15) for detecting the current Igm and the voltage Vgm of the armature coil of the generator motor 2 is provided along with the generator motor 2. Data detected by the G / M sensor 15 is given to the generator motor controller 8.

The power storage device 5 is constituted by an electric double layer capacitor. Accompanying this power storage device 5,
A detection device 16 (hereinafter, referred to as a U / C sensor 16) for detecting the charge / discharge current Ib of the power storage device 5 and the terminal voltage Vb (voltage generated between the positive and negative output terminals of the power storage device 5), respectively; Data detected by the U / C sensor 16 is provided to the power storage device controller 10. In this case, the charging / discharging current Ib detected by the U / C sensor 16 includes a charging current flowing into the power storage device 5 and a discharging current flowing out of the power storage device 5, and the sensor 16 detects and distinguishes these currents. It is possible. Although not shown, the power storage device 5 is also capable of supplying power to a 12V battery or a vehicle-mounted electrical component (such as an air conditioner or an audio device) using the battery as a power source via a DC / DC converter. Also,
In the present embodiment, an electric double layer capacitor is used as the power storage device 5, but a secondary battery such as a battery may be used.

The transmission 3 cuts off the power transmission between the engine 1 and the generator motor 2 and the drive wheels 6 by the operation of the clutch 4 and shifts the power transmission. An actuator 17 for performing a disconnecting operation of the clutch 4 is additionally provided. Further, the transmission 3 has an operation position SP of a shift operation lever (not shown) for setting the operation state by a driver of the vehicle.
For example, a detecting device 18 (hereinafter, referred to as a T / M sensor 18) for detecting an operation state of the transmission 3 is provided.
The detection data of the sensor 18 is given to the transmission controller 9.

Each of the controllers 7 to 11 is constituted by using a microcomputer, and a bus line B is provided so that various kinds of data can be exchanged with each other.
It is connected via L.

Of these controllers 7 to 11, the engine controller 7 controls the operation of the engine 1 through the engine driving device 13, and the generator motor controller 8 controls the operation of the generator motor 2 in the PDU.
The transmission controller 9 controls the operation 3 of the transmission 3 (including the clutch 4) via the actuator 17.

The power storage device controller 10 sequentially grasps the amount of charge (remaining capacity) of the power storage device 5 based on the detection data of the U / C sensor 16 (charge / discharge current Ib and terminal voltage Vb of the power storage device 5). Controller. still,
In ascertaining the charged amount of the power storage device 5, the charge / discharge current Ib
In addition to the detection data of the terminal voltage Vb, the temperature of the power storage device 5 or the like may be considered, or the power storage amount of the power storage device 5 may be grasped only by the terminal voltage Vb.

The general management controller 11 is a controller that performs overall operation management processing of the system according to the present embodiment. The general management controller 11 grasps the required operating state of the vehicle and generates an engine corresponding to the grasped operating state. 1 and the target operating state of the generator motor 2 (specifically, the target output of the engine 1, the target auxiliary output during the assist operation of the generator motor 2, or the target power output during the regenerative operation) and determine the target output state by the engine controller. 7 and generator motor controller 8
And the like. In order to perform the processing, the general management controller 8 includes detection data of a sensor 19 for detecting a vehicle speed Vcar and a sensor 20 for detecting an operation amount Ap (hereinafter, referred to as an accelerator operation amount Ap) of an accelerator pedal (not shown) of the vehicle. Is given.

According to the configuration of the present invention, the generator motor controller 8 and the general management controller 11 correspond to a generator motor controller. Further, the engine controller 7 and the overall management controller 11 correspond to a throttle valve control unit.

Next, the basic operation of the hybrid vehicle according to the present embodiment during traveling will be described.

When the vehicle is running, the general control controller 11 performs a process as shown in the flowchart of FIG. 2 in a predetermined control cycle.

That is, the overall management controller 11
From the detection data of the vehicle speed Vcar given from the sensor 19, the running resistance of the vehicle at the current vehicle speed Vcar (running the vehicle while maintaining the detected vehicle speed Vcar) is obtained by a preset data table as shown by a solid line r in FIG. Required to drive the vehicle (STEP 2)
-1).

Also, the detection data of the accelerator operation amount Ap given from the sensor 20 and the E / G sensor 12
When the engine 1 is operated with the throttle opening θth and the rotational speed NE proportional to the accelerator operation amount Ap from the detection data of the rotational speed NE of the engine 1 given from the engine controller 7 through the engine controller 7, An output generated by the engine 1 (hereinafter referred to as engine power) is obtained from a predetermined map (STEP 2-2).
Note that the accelerator operation amount Ap is sufficiently small (≒ 0),
That is, the engine power in the state where the accelerator operation is released is “0”.

Further, from the detection data of the accelerator operation amount Ap and the detection data of the rotation speed NE of the engine 1, the total target propulsion output of the vehicle required from the accelerator operation amount Ap and the rotation speed NE is determined in advance. It is determined by a predetermined map (STEP 2-3). This target propulsion output is equivalent to the target output of the engine 1 when the vehicle is driven only by the output of the engine 1, and includes the output of the engine 1 and the auxiliary output by the assist operation of the generator motor 2. When the vehicle is run, it corresponds to the target value of the sum of the output of the engine 1 and the auxiliary output of the generator motor 2. The target propulsion output is also “0” in a state where the accelerator operation amount Ap is sufficiently small (小 さ い 0) (a state in which the accelerator operation is released).

Next, the supervisory controller 11 determines whether or not the engine power obtained in STEP 2 is "0" (STEP 2-4). If the engine power is 0, that is, the accelerator operation is not performed. If it has been released, it is determined that the required operating state of the vehicle is the deceleration regeneration mode in which the vehicle is decelerated while performing the regenerative operation of the generator motor 2, and the control process for that mode is performed (STEP).
2-5).

In the control process of the deceleration regeneration mode, the general management controller 11 obtains a target regenerative power output by the regenerative operation of the generator motor 2 (details will be described later), and instructs the generator motor controller 8 of the target regenerative power output. I do. Further, the general control controller 11 sets the target output of the engine 1 to “0” and sets this to the engine controller 7.
To instruct.

At this time, the engine controller 7 given the above instruction closes the throttle valve of the engine 1, stops the fuel supply to the engine 1, and stops the ignition processing by the engine driving device 13. The first output shaft and the rotor of the generator motor 2 connected thereto are driven to rotate by the kinetic energy of the vehicle transmitted from the drive wheels 6 of the vehicle. In this case, the throttle opening θth of the engine 1 instantly becomes “0”.
Instead, due to a mechanical operation delay of the throttle actuator 13c or the like, the opening degree θth in the fully closed state decreases as shown in FIG.

Further, the generator motor controller 8 instructed for the target regenerative power output outputs the actual generator motor 2 grasped by the armature coil current Igm and voltage Vgm detection data provided from the G / M sensor 15. The power supply from the generator motor 2 to the power storage device 5 is controlled via the PDU 14 so that the power generation output of the power generation device becomes the instructed target regenerative power generation output. As a result, the generator motor 2 performs a regenerative operation, and charges the power storage device 5 with the regenerative power output.

On the other hand, when the engine power is not equal to 0 (engine power> 0) in the determination in STEP 2-4, that is, when the accelerator operation is performed, the engine power is determined by the running resistance obtained in STEP 2-1. Is determined (STEP 2-6). In this case, when engine power> running resistance (when the engine power is in the region A in FIG. 3), the general control controller 11 determines that the required operating state of the vehicle is to perform the assisting operation of the generator motor 2. It is determined that the vehicle is in the assist traveling mode in which the vehicle is accelerated, and control processing of the mode is performed (STEP 2-7).

In the control processing in the assist traveling mode,
The overall management controller 11 is a power storage device controller 1
0, a coefficient determined according to the amount of stored power of the power storage device 5 grasped as described below, a coefficient determined according to the accelerator operation amount Ap, and a marginal output to the running resistance of the engine power (the running resistance is subtracted from the engine power). ) And a coefficient determined according to the vehicle speed Vcar, by multiplying the target vehicle propulsion output determined in the above STEP 2-3 by the assisting operation of the generator motor 2 in the target vehicle propulsion output. The target auxiliary output of the generator motor 2 is determined, and the target auxiliary output is instructed to the generator motor controller 8. Then, a value obtained by subtracting the target auxiliary output from the target vehicle propulsion output is set as a target output of the engine 1 and instructed to the engine controller 7.

At this time, the engine controller 7 refers to the data detected by the E / G sensor 12 and causes the engine 1 to generate the specified target output so that the throttle opening degree θth, fuel supply amount, The output of the engine 1 is controlled by determining the ignition timing and instructing it to the engine drive device 13.

The generator motor controller 8 causes the power storage device 5 to supply power to the generator motor 2 via the PDU 14 so as to perform an assisting operation of the generator motor 2 and an auxiliary output generated by the generator motor 2 at this time. The amount of power supplied from the power storage device 5 to the generator motor 2 (input power to the generator motor 2) is set to PD
It is controlled by U14.

Thus, the engine 1 and the generator motor 2
Generates the target output and the target auxiliary output, respectively, and outputs the combined output, that is, the target vehicle propulsion output to the drive wheels 6 via the transmission 3 to accelerate the vehicle.

In this assist running mode, an upper limit is set for the integrated value of the instantaneous discharge amount (discharge power) of the power storage device 5 that supplies power to the generator motor 2, and the integrated value exceeds the upper limit. At times, the power supply to the generator motor 2 is stopped, which will be described later.

If it is determined in STEP 2-6 that the engine power is equal to or less than the running resistance (when the engine power is in the region B in FIG. 3), the general control controller 11 determines that the required operating state of the vehicle is: It is determined that the vehicle is in the cruise regeneration mode in which the vehicle cruises (runs at almost constant speed) while performing the regenerative operation of the generator motor 2 using a part of the output of the engine 1, and the control processing of the mode is performed. (STEP 2-8).

In the control processing in the cruise regeneration mode,
The overall management controller 11 is a power storage device controller 1
0, the target regenerative power output of the generator motor 2 is determined using a map or the like based on the current power storage amount of the power storage device 5 grasped as described later, the rotational speed NE of the engine 1, the vehicle speed Vcar, and the like. An instruction is given to the motor controller 8.
In addition, the overall management controller 11 performs the processing in STEP2-
The output obtained by adding the output corresponding to the target regenerative power output of the generator motor 2 to the target vehicle propulsion output obtained in 3 is set as the target output of the engine 1 and is instructed to the engine controller 7.

At this time, the engine controller 7 adjusts the throttle opening θth, the fuel supply amount, and the ignition timing of the engine 1 so as to cause the engine 1 to generate the specified target output in the same manner as in the assist driving mode. Decide,
The output of the engine 1 is controlled by instructing it to the engine driving device 13.

The generator motor controller 8 supplies power from the generator motor 2 to the power storage device 5 so that the generator motor 2 generates the specified target regenerative power output in the same manner as in the case of the deceleration regeneration mode. The regenerative operation is performed by the generator motor 2 under the control of the PDU 14, and the regenerative power output is charged to the power storage device 5. In this case, of the output of the engine 1, the portion corresponding to the power generation output of the generator motor 2 is used as an energy source for the regenerative operation of the generator motor 2, and the remaining output (= vehicle propulsion output) is used as the transmission 3. Is transmitted to the drive wheels 6 via the.

When the vehicle is traveling in each of the above-described deceleration regeneration mode, assist traveling mode, and cruise regeneration mode, the transmission controller 9
The shift operation of the transmission 3 is performed by the actuator 17 based on the operation position SP of the shift operation lever detected by the T / M sensor 18 and the like. Further, the clutch 4 is kept in the connected state while the vehicle is running.

The operation described above is a basic operation when the hybrid vehicle of the present embodiment is running.

Next, the control processing of the deceleration regeneration mode particularly related to the present invention will be described in more detail with reference to the flowchart of FIG.

In the control process in the deceleration regeneration mode, the general control controller 11 performs the process shown in the flowchart of FIG. 4 in a predetermined control cycle, and outputs the regenerative power output (regeneration power amount) of the generator motor 2 to the generator motor controller 8. Control.

That is, the overall management controller 11
First, the detection data of the vehicle speed Vcar given from the sensor 19 and the detection data of the rotational speed NE of the engine 1 given from the E / G sensor 12 via the engine controller 7 (in this embodiment, this is the generator motor 2 ), The throttle valve of the engine 1 is fully closed (throttle opening θ
In the state of th = 0), a regenerative power output P0 to be generated by the generator motor 2 (hereinafter referred to as a fully closed regenerative power output P0) is obtained (STEP 4-1). In this case, the map basically shows that the larger the rotation speed NE, the larger the fully closed regenerative power output P0, and the larger the vehicle speed Vcar, the larger the fully closed regenerative power output P0. Is set.

The fully closed regenerative power output P0 may be corrected, if necessary, based on the vehicle brake operation (for example, if the brake operation is being performed, the fully closed regenerative power output may be increased, etc.). ) Or a correction based on the amount of power stored in the power storage device 5 (for example, when the amount of stored power is relatively small, the regenerative power generation output when fully closed is increased).

Next, the general management controller 11 determines the throttle opening θ0th (hereinafter referred to as reference throttle opening θ0th) of the engine 1 such that the output of the engine 1 and the running resistance of the vehicle are balanced (equal).
Is obtained from the detection data of the rotation speed NE using, for example, a predetermined data table as shown in FIG. 5 (STEP 4-2).

Next, the overall management controller 11
The detected value of the throttle opening θth of the engine 1 provided from the / G sensor 12 through the engine controller 7 is represented by ST
Compared with the reference throttle opening θ0th obtained in EP4-2 (STEP4-3), when θth ≧ θ0th (when the actual output of the engine 1 is equal to or more than the running resistance of the vehicle), The process of the current control cycle ends.

Then, in STEP4-3, θth <θ0th
, That is, when the actual output of the engine 1 falls below the running resistance of the vehicle (actual deceleration of the vehicle starts in this situation), the general control controller 11
The target regenerative power output Pg of the generator motor 2 is
And the regenerative power output P0 at full closure obtained in step 1 and STEP4-2.
Is calculated by the following equation (1) from the reference throttle opening .theta.0th obtained in the above and the current detected value of the throttle opening .theta.th (STEP4-4).

Pg = P0 · (θ0th−θth) / θ0th (1) Further, the overall management controller 11 instructs the target regenerative power output Pg thus obtained to the generator motor controller 8 (STEP 4). 5), the process of the current control cycle ends.

The generator motor controller 8 instructed by the target regenerative power output Pg as described above causes the regenerative operation of the generator motor 2 to be performed according to the target regenerative power output Pg as described above.

By the above-described control processing, the throttle opening θth of the engine 1 and the regenerative power output of the generator motor 2 change as shown in FIGS. 6A to 6C, for example.

That is, by releasing the accelerator operation,
As shown in FIG. 6 (a), the throttle opening θth decreases to the fully closed throttle opening θth = 0. At this time,
As shown in FIG. 6 (b), the regenerative power output of the generator motor 2 gradually increases to the fully closed regenerative power output P0 as the throttle opening θth decreases, and after the throttle opening θth = 0. Is the regenerative power generation output P0 when fully closed (see equation (1)). Further, at this time, the braking force of the vehicle accompanying the regenerative power generation of the generator motor 2 also changes in the same manner as that of the generator motor 2, so that the braking force does not suddenly change. As a result, as shown in FIG. 6 (c), the vehicle speed Vcar smoothly decreases without a sudden change, and smooth deceleration is performed.

As described above, according to the hybrid vehicle of the present embodiment, when the vehicle is decelerated by releasing the accelerator operation, the regenerative power output of the generator motor 2 is increased as the throttle opening θth decreases. The braking force of the vehicle accompanying the regenerative operation can be smoothly changed,
The vehicle can be smoothly decelerated.

The regenerative operation of the generator motor 2 is performed not only in a state where the throttle opening θth is “0” (fully closed state of the throttle valve) but also in a process until the throttle opening θth is “0”. Since the kinetic energy of the vehicle is effectively used, the power storage device 5 can be charged by the regenerative operation of the generator motor 2.

Further, the regenerative power output P at full closure, which is the regenerative power generated by the generator motor 2 when the throttle valve is fully closed
0 is set in accordance with the operating state of the vehicle, such as the rotational speed NE of the engine 1 (this is equal to the rotational speed of the generator motor 2 in the present embodiment) and the vehicle speed Vcar. It can be performed.

In the present embodiment, the output shaft of the engine 1 and the rotor of the generator motor 2 are connected so as to rotate at a constant speed, but a speed change mechanism may be interposed between them.
In this case, when the regenerative power output P0 when the generator motor 2 is fully closed is set, the regenerative power output P0 when the generator motor 2 is used instead of the engine NE.
0 may be set.

[Brief description of the drawings]

FIG. 1 is a system configuration diagram of an embodiment of a control device for a hybrid vehicle according to the present invention.

FIG. 2 is a flowchart for explaining a basic operation of the apparatus of FIG. 1;

FIG. 3 is a diagram for explaining a basic operation of the apparatus of FIG. 1;

FIG. 4 is a flowchart for explaining the operation of the main part of the apparatus of FIG. 1;

FIG. 5 is a diagram for explaining the operation of the main part of the apparatus of FIG. 1;

FIG. 6 is a diagram illustrating an operation mode of the hybrid vehicle of FIG. 1 by operation of the apparatus of FIG. 1;

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Engine, 2 ... Generator motor, 5 ... Power storage device, 7 ... Engine controller (throttle valve control means), 8 ... Generator motor controller (Generator motor control means), 11 ...
Supervisory controller (generator motor control means, throttle valve control means).

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Shigeru Ibaraki 1-4-1, Chuo, Wako, Saitama Prefecture Inside Honda R & D Co., Ltd. (72) Eiji Tachibana Inventor 1-4-1, Chuo, Wako, Saitama Honda R & D Co., Ltd.

Claims (3)

[Claims] 1. An engine as a propulsion source of a vehicle, an operation as a motor for generating an auxiliary output for assisting the output of the engine by using electric power of a power storage device, and a power generation for regenerative generation of electric power for charging the power storage device. And a throttle motor control means for controlling the opening degree of the throttle valve of the engine in accordance with the accelerator operation of the vehicle, the throttle valve control means with the release of the accelerator operation In a control device for a hybrid vehicle that performs regenerative power generation of the generator motor while applying kinetic energy of the vehicle to the generator motor during deceleration of the vehicle in which the throttle valve is fully closed, the accelerator operation is released. In response to the release, at least during the period until the throttle valve is fully closed by the Stroll valve control means, A control device for a hybrid vehicle, further comprising: generator motor control means for causing the generator motor to generate electric power with a regenerative power generation amount according to an operation state of the engine including an opening degree of the throttle valve. 2. The generator motor control means according to claim 1, wherein the regenerative electric power generated during the period until the throttle valve is fully closed is set to a predetermined regenerative electric power in the fully closed state of the throttle valve. 2. The control device for a hybrid vehicle according to claim 1, wherein the control is performed so as to gradually increase as the opening degree decreases. 3. The predetermined regenerative power generation amount in the fully closed state of the throttle valve is a regenerative power generation amount in accordance with a vehicle operating state including a rotational speed of the engine or a rotational speed of the generator motor and a speed of the vehicle. 3. The control device for a hybrid vehicle according to claim 2, wherein