JP3287943B2 - Control device for hybrid vehicle - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a hybrid vehicle in which an engine as a main driving power source and an electric motor as an auxiliary driving power source are connected in parallel to a transmission. The present invention relates to a control device for securing.

[0002]

2. Description of the Related Art A so-called parallel hybrid vehicle in which an engine and an electric motor are connected in parallel to a transmission has been conventionally known as one type of a hybrid vehicle using an engine and an electric motor as driving power sources. This parallel hybrid vehicle is disclosed in, for example, Japanese Patent Application Laid-Open No. 4-24156.
In general, as disclosed in Japanese Patent Application Laid-Open Publication No. H10-209, an engine is used as a main driving power source and an electric motor is used as an auxiliary driving power source. When torque is required, the engine is torque assisted by driving an electric motor having excellent responsiveness in addition to driving the engine.

As described above, by using an electric motor as an auxiliary driving force source for an engine, it is possible to increase the acceleration performance of a vehicle by adding an electric motor drive when necessary while operating the engine with high efficiency.

When an electric motor is used as an auxiliary driving force source, a power source for the electric motor having a relatively small capacity (for example, a chargeable / dischargeable battery or a capacitor, etc., is set to 0 at the time of maximum power storage). -100 km / h acceleration) can be used, thereby making it possible to reduce the size and weight of the power supply.

[0005]

However, when such a small-capacity power supply is used, the capacity is naturally not so large that if the acceleration operation is repeated many times while the vehicle is running, When the remaining capacity is significantly reduced and the next torque assist (auxiliary drive) or the like is required, there is a problem that the torque assist or the like cannot be performed smoothly due to the lack of the remaining capacity.

That is, if the engine is stopped in a state in which the remaining capacity of the power supply has been greatly reduced, the torque assist of the engine by the electric motor cannot be performed at the next engine start, so that the vehicle starting performance is improved. There is a problem that it cannot be achieved. Also, even if there is sufficient remaining capacity when the engine is stopped, if the engine is restarted after the engine has been stopped for a long time, the remaining capacity will gradually decrease due to the occurrence of leakage current and the like during that time. There is a problem that the remaining capacity may be insufficient. Further, when the power supply is used as an electric heat source for heating the catalyst,
If the remaining capacity is insufficient, there is a problem that the catalyst cannot be raised to its activation temperature when the engine is restarted.

The present invention has been made in view of such circumstances, and even when a small-capacity power supply is used as a power supply for an electric motor, the power supply for restarting the engine is supplied to the power supply. It is an object of the present invention to provide a hybrid vehicle control device that can be secured.

[0008]

According to a first aspect of the present invention, there is provided a torque converter having a lock-up clutch.
When the vehicle decelerates, the torque converter locks up.
Performs flop, when configured as to perform regenerative braking to the electric motor, when the time of vehicle deceleration, the remaining capacity of the electric motor power is equal to or less than a predetermined value, the b
The above-described object is achieved by canceling the backup and increasing the generated torque of the engine to increase and correct the charging efficiency of the power supply by driving the engine, thereby supplementing the charging action by the regenerative braking of the electric motor. .

That is, in a hybrid vehicle in which an engine as a main driving force source and an electric motor as an auxiliary driving force source are connected to a transmission in parallel, the vehicle is decelerated when the vehicle decelerates. A control device configured to cause an electric motor to perform regenerative braking, wherein
Brid vehicle is a torque converter with lock-up clutch
The torque converter is locked when the vehicle decelerates.
Is configured to perform the up, and charging means for charging the power source for the electric motor by driving the engine, the remaining capacity detecting means for detecting a remaining capacity of the power source, when the vehicle deceleration, being the detected If the remaining capacity is below a predetermined value, the torque increase correction means for increasing correcting the generated torque of the engine, when the vehicle deceleration, the detected remaining capacity
When the amount falls below a predetermined value, the lock-up is performed.
Lock-up release control means for releasing the lock-up .

A second invention according to the present application is an electric vehicle which operates when the vehicle decelerates.
When the air motor is configured to perform regenerative braking,
When the vehicle decelerates, the remaining capacity of the electric motor power
When it becomes under Ne以 may increase the generated torque of the engine
Correction to increase the charging efficiency of the power supply driven by the engine.
To compensate for the charging effect of regenerative braking of the electric motor.
On the other hand, when you do not need increase correction like at high speed,
By not performing this increase correction, the above objective can be achieved.
That's what I did.

That is, as described in claim 2,
Engine as driving power source and electricity as auxiliary driving power source
Hybrid vehicle in which the motor and the transmission are connected in parallel to the transmission
In both cases, when the vehicle decelerates, regenerative braking is applied to the electric motor.
A control device configured to cause the
Charging the power supply for the electric motor by driving the gin.
Power means and remaining capacity detection for detecting the remaining capacity of the power supply
Means, and when the vehicle decelerates, the detected remaining capacity is a predetermined value.
In the following cases, the generated torque of the engine is corrected to increase.
And a torque increase correction means.
Is performed only when the vehicle speed is lower than the predetermined value.
It is characterized by having been done.

According to a third aspect of the present invention, when the state of charge of the electric motor power supply falls below a predetermined value, it is detected when the ignition switch of the engine is turned off.
If the remaining capacity exceeds the specified value, the engine
While the detected remaining capacity is lower than a predetermined value.
When the engine is below the engine, the engine is operated until the predetermined value is exceeded.
The above-described object is achieved by performing required charging of the power supply while continuing driving of the power supply.

[0013] That is, as described in claim 3, in a hybrid vehicle and an electric motor are connected in parallel to the transmission of the engine and an auxiliary drive power source of the main drive power source, stop timing of the engine A charging unit for charging a power supply for the electric motor by driving the engine, and a remaining capacity detection unit for detecting a remaining capacity of the power supply.
If, when the ignition switch before SL engine is turned off, when the detected remaining capacity exceeds a predetermined value
Performs the first control for stopping the driving of the engine.
On the other hand, the detected remaining capacity has become a predetermined value or less.
Sometimes, the engine is driven until the predetermined value is exceeded.
And engine drive continuation control means for performing a second control to continue the operation.

[0014] The fourth invention according to the present application is characterized in that during normal driving,
While only the engine is driven, it is under heavy load and large
When a high drive torque is required, the
If the motor is configured to be driven in addition to
In this case, when the remaining capacity of the electric motor power supply becomes equal to or less than a predetermined value while the vehicle is stopped and the engine is stopped, the engine is started and the power supply is charged by a predetermined amount, whereby the remaining capacity against current leakage and the like is reduced. The purpose is achieved by performing recovery.

[0015] That is, as described in claim 4, the engine as the main drive power source and an electric motor as an auxiliary drive power source is connected in parallel to the transmission, during normal running before
While driving only the engine, it is under heavy load and large
When a high drive torque is required, the
Configured to drive the electric motor in addition to motion
A control device for a hybrid vehicle, wherein a remaining capacity detecting means for detecting a remaining capacity of a power supply for the electric motor; and wherein the detected remaining capacity is equal to or less than a predetermined value while the vehicle is stopped and the engine is stopped. When it becomes
Charge control means for starting the engine and charging the power source by a predetermined amount.

[0016] The above Symbol and "are connected in parallel to transmission" is,
This means that the transmission is connected to the transmission such that the torque generated by the engine and the torque generated by the electric motor are transmitted to the drive system in parallel.

The "electric motor" may be an AC motor such as an induction motor or a synchronous motor, or may be a DC motor.

The above-mentioned "power supply" can remarkably obtain the effects of the present invention when it is a small-capacity electric storage source, but is not necessarily limited to this. In addition, the type of the “power supply” is also typically a secondary battery such as a lead storage battery, but is not limited to this.
A capacitor or flywheel battery (ie, a combination of flywheel and motor,
The inertial energy stored in the flywheel is taken in and out as electric energy by generating and driving a motor.)
And so on.

The "remaining capacity of the power supply" means the remaining energy of the power supply.

[0020]

As described above, according to the first aspect of the present invention (the invention described in claim 1),
Locks up the torque converter during vehicle deceleration
Thus, while the electric motor performs regenerative braking, when the remaining capacity of the electric motor power supply falls below a predetermined value (ie,
When the increase in engine generated torque is corrected)
Because the torque converter lock-up is released and the generated torque of the engine is corrected to be increased, the increase correction enhances the charging efficiency of the power supply by driving the engine and supplements the charging action by the regenerative braking of the electric motor. Can be.

Therefore, according to the first aspect, even when a small-capacity power supply is used as the power supply for the electric motor, the power supply required for restarting the engine can be secured in the power supply. .

The above-mentioned "increase correction" refers to both the case where the currently generated torque is zero, such as when decelerating on flat ground, and the case where a certain amount of torque is currently being generated, such as when decelerating on an uphill. Given the, Ru der meant to the torque larger than the current torque.

The second invention according to the present application (the invention according to claim 2)
), The electric motor power remains when the vehicle decelerates
When the capacity falls below the specified value, the engine
The torque is compensated for by increasing
Improve the charging efficiency of the power source driven by the engine
To compensate for the charging effect of the regenerative braking of the air motor.
You.

Further, the above-described increase correction is performed for a vehicle having a predetermined value or less.
Since it is performed only at high speed, it is necessary to
The engine is as efficient as possible during high-speed operation where
Can drive in the area.

Therefore, according to the second aspect of the present invention,
When a small-capacity power supply is used as the power supply for the motor
Even if the required power for restarting the engine is
I can put it.

[0026] In a third invention according to the present (invention described in claim 3), when the remaining capacity of the electric motor power is equal to or less than a predetermined value, when the ignition switch is turned off, are detected remaining When the capacity exceeds the specified value
The first control to stop the driving of the engine,
When the detected remaining capacity falls below a predetermined value,
To continue driving the engine until the predetermined value is exceeded.
The control of each is selected and performed, so
The required charging of the power supply can be performed by continuing the engine driving.

Therefore, according to the third aspect , even when a small-capacity power supply is used as the power supply for the electric motor, the power supply required for restarting the engine can be secured in the power supply. .

Here, the "predetermined period" is not particularly limited as long as the required power at the time of restarting the engine can be ensured by charging by continuing the engine driving. It is possible to adopt a time until the capacity exceeds the above-mentioned predetermined value, or a time in consideration of a period in which the remaining capacity will exceed the above-mentioned predetermined value.

[0029] In a fourth invention according to the present (invention described in claim 4), when the vehicle is and while the engine is stopped in the stopped state, the remaining capacity of the electric motor power is equal to or less than a predetermined value, starts the engine Then, the power supply is charged by a predetermined amount, thereby recovering the remaining capacity against current leakage or the like. Therefore, it is possible to recover the remaining capacity corresponding to the capacity reduced by the current leakage or the like due to the start of the engine.

Therefore, according to the fourth aspect , even when a small-capacity power supply is used as the power supply for the electric motor, it is possible to secure the required power for restarting the engine in the power supply. .

Here, the "predetermined amount" is not particularly limited as long as the required power at the time of restarting the engine can be ensured by charging the predetermined amount. capacity Ru can der be set to the amount required to be above a predetermined value greater than expected the remaining capacity decrease by the required amount or re-current leakage, etc., to exceed the predetermined value.

[0032]

Embodiments of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 is a block diagram showing a first embodiment of a control device for a hybrid vehicle according to the present invention.

This hybrid vehicle has an engine 12 as a main driving power source and an electric motor 1 as an auxiliary driving power source.
4 is connected to the transmission 16 in parallel, and the torque generated by driving the engine 12 or the electric motor 14 is transmitted from the transmission 16 to the left and right driving wheels 20L, 20R via the differential device 18. To be transmitted. The electric motor 14 is configured to perform regenerative braking when the vehicle decelerates, and the transmission 16 includes a torque converter with a lock-up clutch. In this hybrid vehicle, only the engine 12 is driven during normal driving, and when the vehicle is in a high load state and a large driving torque is required, such as when the vehicle starts or when overtaking acceleration is performed, the driving of the engine 12 is performed. In addition to the above, the electric motor 14 is driven to assist the torque of the engine 12, thereby improving running performance and suppressing generation of exhaust gas, especially HC (hydrocarbon).

The torque assist control includes a system controller 22, an engine transmission controller 24,
The control is performed by a control device 30 including a motor controller 26 and a heater controller 28.

The system controller 22 receives an accelerator pedal depression amount signal and other various signals indicating a traveling state amount. The system controller 22 determines the accelerator depression amount and other traveling state amounts based on the accelerator depression amount and other traveling state amounts. Thus, control signals relating to the torque assist and the like are output to the engine transmission controller 24, the motor controller 26, and the heater controller 28.

The engine transmission controller 24 includes:
The drive control of the engine 12 and the shift control of the transmission 16 are performed based on a control signal from the system controller 22. And for the transmission 16,
Lock-up and lock-up release of the lock-up clutch are also performed.

The motor controller 26 includes an inverter (power converter) for orthogonally transforming the power supplied from the power supply 32 for the electric motor 14 and driving the electric motor 14, and a control signal from the system controller 22. , The drive of the electric motor 14 is controlled with a predetermined current and voltage.

The heater controller 28 heats the catalyst 38 provided in the engine exhaust system and controls the heating temperature.

The power source 32 is a chargeable / dischargeable battery or capacitor, and has a capacity of 0-100 km / h at the time of maximum power storage.
It consists of a small-capacity electric storage source that can accelerate.
The power source 32 is charged by power supply from a generator 34 that generates power by rotation of the engine 12.

In this embodiment, a remaining capacity detector 36 for detecting the remaining capacity of the power supply 32 is provided.
The remaining capacity detected by the remaining capacity detector 36 is input to the system controller 22. As a method for detecting the remaining capacity, for example, when the power supply 32 is a capacitor, an arithmetic expression: remaining capacity = (capacitance ×
(Terminal voltage) ² ) / 2 or a method where the power source 32 is a battery can be obtained from the specific gravity of the electrolyte or the total running distance.

When the remaining capacity of the power supply 32 becomes equal to or less than a predetermined value during vehicle deceleration, the system controller 22 increases the charging efficiency of the power supply 32 by driving the engine 12 by increasing the torque generated by the engine 12 to increase the electric motor. 14
Of the power required by the regenerative braking of the engine 12 to stop and restart the engine after the engine is stopped (that is, torque assist of the engine 12 by the electric motor 14 and the cold The electric power required for heating the catalyst 38 at the time is secured.

Next, the control contents of the system controller 22 when the vehicle is decelerated will be described with reference to the flowchart shown in FIG.

First, when the vehicle starts to decelerate in step S1, the lock-up clutch is locked up in step S2 to increase the deceleration energy regeneration efficiency described later.

Next, in step S3, it is determined whether or not the vehicle speed at that time exceeds a predetermined value Va. If the vehicle speed exceeds the predetermined value Va, the engine is not immediately stopped, so that normal deceleration energy regeneration is performed (step S4). That is, the lock-up clutch is locked and the electric motor 14 performs regenerative braking, and the energy regenerated by the regenerative braking is supplied to the power supply 3.
Supply to 2. On the other hand, if the vehicle speed is less than or equal to or less than the predetermined value Va when the vehicle starts decelerating in step S3, there is a possibility that the engine will be stopped due to the vehicle stop soon, In order to secure power, the processing of step S5 and subsequent steps is performed.

That is, in step S5, the power supply 3
It is determined whether or not the remaining capacity Q of No. 2 has become equal to or less than the remaining capacity lower limit value Qa necessary for securing the required power. When the remaining capacity lower limit value Qa is exceeded, normal deceleration energy regeneration is performed. On the other hand, when the remaining capacity lower limit value Qa is less than or equal to the remaining capacity lower limit value Qa, an increase correction of the generated torque of the engine 12 is performed in step S6 and lower.

First, in step S6, when the deceleration state is maintained as it is, the capacity Qc that can be accumulated by the regeneration of the deceleration energy until the vehicle stops is calculated from the table shown in FIG. Note that the storable capacity Qc increases as the deceleration increases.

Next, in step S7, it is determined whether or not a value obtained by adding the storage capacity Qc to the current remaining capacity Q is equal to or less than the remaining capacity lower limit value Qa. If the remaining capacity is lower than the lower limit value Qa, the normal deceleration energy regeneration is performed. On the other hand, if the remaining capacity is lower than the lower limit value Qa, the required power cannot be secured by vehicle deceleration alone until the vehicle stops. Therefore, in order to increase and correct the generated torque of the engine 12, first, in step S8, after the lock-up of the lock-up clutch is released,
In step S9, a target deceleration Do is calculated. In the calculation of the target deceleration Do, it is difficult to decelerate by increasing the generated torque of the engine 12 in proportion to the correction, so that a deceleration that does not give the driver a sense of incongruity according to the brake depression amount and the vehicle speed is obtained. This is calculated from the table in FIG.

[0049] Thereafter, in step S10, increases corrects the throttle opening of the engine 12 to a predetermined value TVO _0. This TVO ₀ is a larger throttle opening than when the vehicle is decelerating with the throttle fully closed, such as when traveling on flat terrain, or when the vehicle is decelerating at a certain throttle opening, such as when traveling uphill. (Constant value). By increasing and correcting the throttle opening in this way, the torque generated by the engine 12 is also increased and corrected, whereby the amount of power generated by the generator 34 increases and the generator 3
4, the charging efficiency of the power supply 32 is improved.

On the other hand, in steps S11 to S15,
Feedback control of the generated torque of the electric motor 14 is performed to decelerate the vehicle at the target deceleration Do. That is, after initializing the generated torque Tm of the electric motor 14 to Tm = 0, until the vehicle speed becomes zero, Tm = Tm + kd (Do-D) kd: feedback gain (negative constant) D: calculation of actual deceleration The generated torque Tm is set by the equation (steps S11 to S14). Then, when the vehicle speed becomes zero, the engine is stopped (step S15).

FIG. 5 is a time chart showing the above control contents with respect to vehicle speed, remaining capacity, and engine generated torque.
It becomes as shown in.

As described in detail above, in the present embodiment, when the remaining capacity of the electric motor power supply 32 is equal to or less than the remaining capacity lower limit value Qa when the vehicle speed becomes Va during vehicle deceleration, the engine 12 Since the generated torque is corrected for increase, the charge correction of the electric motor 14 by regenerative braking of the electric motor 14 can be supplemented by increasing the charge efficiency of the power supply 32 by driving the engine.

Therefore, according to the present embodiment, even when a small-capacity power supply is used as the power supply 32 for the electric motor 14, it is necessary to secure the required power for restarting the engine in the power supply 32. Can be.

Next, a description will be given of a second embodiment of the control device for a hybrid vehicle according to the present invention.

In this embodiment, the electric motor power supply 3
When the remaining capacity Q of the engine 2 becomes equal to or less than the remaining capacity lower limit value Qa, the engine drive is continued for a predetermined period even after the ignition switch is turned off, and the power supply 32 is charged as required by continuing the engine drive. It has become.

That is, as shown in the flowchart of FIG. 6, when the engine speed Ne decreases to the idling speed Ni in step S1 (that is, when the vehicle stops running), the lock-up of the lock-up clutch is released. Later (step S2), the engine 12
At the idling rotational speed Ni (step S
3). Thereafter, when the ignition switch of the engine 12 is turned off (step S4), it is determined whether or not the remaining capacity Q of the power supply 32 has become equal to or less than the remaining capacity lower limit value Qa (step S5). As a result, if the remaining capacity Q exceeds the remaining capacity lower limit value Qa, the required power at the time of restarting the engine is already secured, so the engine 12 is stopped as it is (step S6). If the remaining capacity is equal to or lower than the lower limit value Qa, it is determined that the required power has not been secured yet, and the engine 12 is driven at the idling rotation speed Ni (step S3). Plan. When the remaining capacity Q of the power supply 32 exceeds the remaining capacity lower limit value Qa due to this charging, the engine 12 is stopped (step S6).

FIG. 7 is a time chart showing the above control contents in terms of vehicle speed, engine speed and remaining capacity.

As described above, according to the present embodiment, even when a small-capacity power supply is used as the power supply 32 for the electric motor 14, the power supply 32 can secure the required power at the time of engine restart. I can put it.

In step S3, instead of driving the engine 12 at the idling speed Ni,
The engine may be driven at a rotation speed higher than the idling rotation speed Ni according to the remaining capacity Q. By doing so, the engine driving continuation time is changed to the remaining capacity Q.
Irrespective of the magnitude of the distance.

Next, a third embodiment of the control apparatus for a hybrid vehicle according to the present invention will be described.

In this embodiment, when the engine is stopped, the remaining capacity Q of the electric motor power supply 32 is changed to the remaining capacity lower limit value Qa.
When the condition becomes below, the engine 12 is started and the power source 32 is charged by a predetermined amount, and the remaining amount of the capacity reduced by the current leakage or the like due to the charging is recovered.

That is, as shown in the flowchart of FIG. 8, when the vehicle speed is zero (step S1), the remaining capacity Q of the power supply 32 becomes equal to or less than the remaining capacity lower limit Qa (step S1).
2) If the engine 12 is stopped (step S3), the engine 12 is started (step S3).
4) The engine 12 is driven at the idling rotation speed Ni until the remaining capacity Q exceeds a predetermined value Qb (Qb> Qa), and the driving causes the generator 34 to generate power to charge the power supply 32 (step S5, S6). When the remaining capacity Q of the power supply 32 exceeds the predetermined value Qb due to this charging, the engine 12 is stopped (step S7). The reason why the predetermined value Qb is set to a value larger than the remaining capacity lower limit value Qa is to allow for a reduction in the remaining capacity due to current leakage or the like again.

FIG. 9 is a time chart showing the above control contents in terms of the engine speed and the remaining capacity.

As described above, according to the present embodiment, even when a small-capacity power supply is used as the power supply 32 for the electric motor 14, the power supply 32 ensures the required power at the time of engine restart. I can put it.

Next, a third embodiment of the control device for a hybrid vehicle according to the present invention will be described.

In this embodiment, as shown in FIG. 10, a battery power supply 40 is provided separately from the electric motor power supply 32.
Is connected to the power supply 32 via the voltage converter 42,
When the remaining capacity Q of the electric motor power supply 32 becomes equal to or less than the predetermined value Qa while the engine is stopped, the system controller 22 issues a charge command signal to the voltage converter 42, and based on this, the voltage converter 42 Power supply 3
2, the power supply 32 is charged by a predetermined amount, and the charging recovers the remaining capacity of the capacity reduced by current leakage or the like.

That is, as shown in the flowchart of FIG. 11, when the vehicle speed is zero (step S1), the engine 1
2 is stopped (step S2), and when the remaining capacity Q of the power supply 32 becomes equal to or lower than the remaining capacity lower limit value Qa (step S3), until the remaining capacity Q exceeds a predetermined value Qb (Qb> Qa). Power is supplied from the battery power supply 40 to the power supply 32 to charge the power supply 32 (steps S4 and S5).

FIG. 12 is a time chart showing the above control contents in terms of the remaining capacity.

As described above, according to the present embodiment, even when a small-capacity power supply is used as the power supply 32 for the electric motor 14, the power supply 32 can secure the required power for restarting the engine. I can put it.

In general, a sufficient charging time can be secured while the engine is stopped.
If 0 has a large capacity, the power does not necessarily have to be large.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a first embodiment of a control device for a hybrid vehicle according to the present invention;

FIG. 2 is a flowchart showing the operation of the first embodiment.

FIGS. 3, 4 and 5 are graphs showing the operation of the first embodiment.

FIG. 6 is a flowchart showing the operation of the second embodiment of the hybrid vehicle according to the present invention.

FIG. 7 is a graph showing the operation of the second embodiment.

FIG. 8 is a flowchart showing the operation of the third embodiment of the hybrid vehicle according to the present invention.

FIG. 9 is a graph showing the operation of the third embodiment.

FIG. 10 is a block diagram showing a fourth embodiment of the control device for a hybrid vehicle according to the present invention;

FIG. 11 is a flowchart showing the operation of the fourth embodiment.

FIG. 12 is a graph showing the operation of the fourth embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 12 Engine 14 Electric motor 16 Transmission 22 System controller 24 Engine transmission controller 26 Motor controller 28 Heater controller 30 Control device 32 Power supply 34 Generator 36 Remaining capacity detector 38 Catalyst 40 Battery power supply 42 Voltage converter

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FIF16H 61/14 601 B60K 9/00 ZHVE (56) References JP-A-5-319119 (JP, A) JP-A-4-271209 (JP, a) JP Akira 50-30223 (JP, a) JP Akira 60-55803 (JP, a) JP flat 6-296302 (JP, a) (58 ) investigated the field (Int.Cl. ⁷ B60L 11/00-11/14 B60K 6/02-6/04 F02D 29/00-29/06 F02N 11/04 F02P 9/00 F16H 61/14

Claims (4)

(57) [Claims] In a hybrid vehicle in which an engine as a main driving power source and an electric motor as an auxiliary driving power source are connected in parallel to a transmission, the electric motor performs regenerative braking when the vehicle decelerates. Wherein the hybrid vehicle has a torque-up clutch with a lock-up clutch.
Comprising a click converter, when the vehicle decelerates, the torque converter
Is configured to perform the lock-up of the motor, the charging means by the driving of the prior SL engine to charge the power source for the electric motor, and the remaining capacity detecting means for detecting a remaining capacity of the power source, when the vehicle decelerates, When the detected remaining capacity becomes equal to or less than a predetermined value, a torque increase correction means for increasing and correcting the generated torque of the engine; and when the vehicle decelerates, the detected remaining capacity becomes equal to or less than a predetermined value.
Lock-up to release the lock-up
Control apparatus for a hybrid vehicle, characterized by comprising a flop release control means. 2. An engine and an auxiliary drive as a main driving force source
An electric motor as a power source is connected to the transmission in parallel.
When the vehicle decelerates, the electric motor
The controller is configured to cause the motor to perform regenerative braking.
There, charged power for the electric motor by driving the engine
Charging means for charging the power, remaining capacity detecting means for detecting the remaining capacity of the power supply, and when the detected remaining capacity becomes less than or equal to a predetermined value during vehicle deceleration.
The engine torque is increased.
A torque increase correction means that has a, the increase correction is configured to be performed only when a predetermined value or less of the vehicle speed, features and be Ruha Iburi'<br/> de vehicle that Control device. 3. In a hybrid vehicle in which an engine as a main driving power source and an electric motor as an auxiliary driving power source are connected to a transmission in parallel, a control configured to control stop timing of the engine. an apparatus comprising: charging means for charging the power source for the electric motor by driving the engine, the remaining capacity detecting means for detecting a remaining capacity of the power source, an ignition switch before SL engine is turned off
When the detected remaining capacity exceeds a predetermined value.
Performs a first control for stopping the driving of the engine.
On the other hand, when the detected remaining capacity is equal to or less than a predetermined value.
Continue driving the engine until the specified value is exceeded.
Engine drive continuation control means for performing a second control to
A control device for a hybrid vehicle, comprising: 4. An engine as a main driving power source and an electric motor as an auxiliary driving power source are connected to a transmission in parallel, and during normal driving, only the engine is driven.
When a large driving torque is required under load
Drive the electric motor in addition to driving the engine.
A control device in a hybrid vehicle configured to moving a remaining capacity detecting means for detecting the power remaining capacity of for the electric motor, the vehicle is stopped in a and the engine stopped state, being the detected A control device for a hybrid vehicle, comprising: charge control means for starting the engine and charging the power source by a predetermined amount when the state of charge becomes equal to or less than a predetermined value.