JPH10295002A - Braking and auxiliary accelerating equipment for internal combustion engine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To rapidly store and release energy during braking and acceleration of a hybrid car, and to reduce the size of a battery. SOLUTION: As power storing means, a flywheel equipment 6, in which a motor generator 8 is coupled to the rotating shaft of a flywheel and the voltage at its electric terminal and a terminal voltage of a battery 5 are matched by a converter 9, is installed together with a battery 5, and energy generated in a rotary machine 2 during braking is regenerated from an inverter circuit 3 to the flywheel equipment 6 and the battery 5. Energy stored during auxiliary acceleration is supplied from an inverter circuit 3 to the rotary machine 2, and a drive force is given to an internal combustion engine. By doing this, the repetition number of times of charging/discharging of the battery 5 can be reduced, and the life and maintenance period of the battery can be made long.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention converts mechanical energy generated when braking a vehicle connected to an internal combustion engine into electrical energy and stores the same, and stores the electrical energy when the vehicle is accelerated. The energy is supplied to the auxiliary accelerator and used for a device that generates mechanical energy. The present invention relates to HI
This is a device suitable for mounting on a hybrid vehicle sold by the present applicant under the name of MR.

[0002]

2. Description of the Related Art It is a future development trend to convert automobile power from internal combustion engine power to electric power in consideration of environmental conservation and the future of finite petroleum resources. Has a long way to go. At present, it is difficult to convert the power of the internal combustion engine to electric power at once, and a hybrid vehicle using both the power of the internal combustion engine and the electric power has been developed as an intermediate form.

The applicant of the present application has disclosed the invention as one form of a hybrid vehicle in International Publication WO88 / 06107 (International Application No. PCT / JP88 / 00157). This is because a squirrel-cage induction machine is directly connected to the rotating shaft of an internal-combustion engine, and this squirrel-cage induction machine is operated as a generator or an electric motor, so that the squirrel-cage induction machine is used as a braking device for a vehicle equipped with an internal-combustion engine, It is used as an accelerator. This prior art device has a configuration illustrated in FIG. 9, and converts electric energy bidirectionally between a power storage means (conventionally a storage battery), a polyphase AC circuit of the cage induction machine, and a DC circuit of the power storage means. And a control circuit (control circuit by a computer) for controlling the inverter circuit.

Further, in this device, the control circuit sets an auxiliary acceleration mode in which the squirrel-cage induction machine is used as an auxiliary power unit for the internal combustion engine and a braking mode in which the squirrel-cage induction machine is used for braking the vehicle in accordance with the driving operation. In the auxiliary acceleration mode, the squirrel cage induction machine is operated as an electric motor by applying a rotating magnetic field having a speed exceeding the rotation speed of the internal combustion engine to the squirrel cage induction machine, and in the braking mode, the speed is lower than the rotation speed of the squirrel cage induction machine. Means for controlling the cage induction machine to operate as a generator by applying a rotating magnetic field of
In the auxiliary acceleration mode, the DC output of the electric energy stored in the storage means is given to the cage-type induction machine as a polyphase AC output,
In the deceleration mode, the squirrel-cage induction machine includes circuit means for supplying the polyphase AC output energy of the squirrel-cage induction machine to the power storage means as a DC output. Here, a lead storage battery has been conventionally used as the power storage means. Currently, as a regular bus traveling in the city area or a tourist spot bus where environmental regulations are strict,
As shown in FIG. 10, the product of the applicant of the present invention, which is sold and supplied, has a large battery compartment provided under the floor of a vehicle, and a 300 V storage battery connected in series to the battery compartment is stored.

[0005] The above device is implemented in a large bus and is manufactured and sold by the present applicant under the name of HIMR. This large bus is used in city buses that run in urban areas and in sightseeing spots where environmental protection regulations are strict.

[0006] On the other hand, before conceiving the above-mentioned HIMR (at the time of 1983), the present applicant researched a technique of performing braking and auxiliary acceleration using an inductor-type motor generator connected to an internal combustion engine. did. At this time, a technique for temporarily storing energy in the flywheel device has been proposed and the content thereof has been disclosed (Japanese Patent Application Laid-Open No. 60-32503). In this technology, irregularities are provided around the flywheel of an internal combustion engine, and this is used to construct an inductor-type motor-generator. There is no technical idea of controlling the speed of the rotating magnetic field by the computer. The technology disclosed in the above publication is not related to a hybrid vehicle equipped with a battery. In particular, there is no disclosure of how to install a battery and a flywheel device side by side and control the energy distribution. Certainly, the invention disclosed in the above-mentioned publication is the basis of the invention of the present application, but the configuration of the present invention is fundamentally greatly different from the configuration of the technology disclosed in the above-mentioned publication.

[0007]

The above-mentioned product HIMR is
Although it has been well received in terms of performance, batteries for storing energy still have problems, one of which is miniaturization. In addition, storage batteries require maintenance work such as replenishment and charging while observing the state of the electrodes and the specific gravity of the electrolyte at regular intervals. Therefore, it is not appropriate to perform maintenance management at a general gas station or the like.

[0008] Further, since the storage battery is a device for storing or releasing energy by a chemical reaction, the speed of storing and releasing energy is naturally limited. If the battery is used at a speed exceeding the energy storage and release speed, that is, the chemical reaction speed, the temperature of the battery rises, energy is wasted, and the electrode is deteriorated to shorten the battery life. Therefore, in order to efficiently regenerate energy generated at a time during braking of the vehicle and efficiently generate energy used at a time during assisted acceleration, it is absolutely necessary to increase the capacity of the battery.

As a countermeasure for this, a circuit for discharging energy to be regenerated from a resistor in order to temporarily discharge a large amount of generated energy and improve the braking force has been considered (Japanese Patent Laid-Open Publication No. Sho. 63-265527). Also, a technology has been considered in which a battery is made smaller and an electrostatic capacity (capacitor) is used in combination instead (Japanese Patent Laid-Open No. 5-2 / 1993).
No. 60610).

The present invention has been made in view of such a background, and an object of the present invention is to provide an energy storage means which enables rapid energy storage and rapid energy release. An object of the present invention is to provide a hybrid vehicle capable of reducing the size of a battery. The present invention
It is an object of the present invention to provide a device that can effectively regenerate energy generated by braking. The present invention reduces the number of charge / discharge repetitions of a battery of a hybrid vehicle,
An object of the present invention is to prolong battery life and prolong battery maintenance cycle.

[0011]

SUMMARY OF THE INVENTION The present invention is intended to temporarily store the energy generated at once in excess of the amount of energy that can be regenerated during braking of a vehicle, and to utilize this energy effectively during auxiliary acceleration. Features.

That is, according to the present invention, a rotary machine connected to a rotating shaft of an internal combustion engine, a power storage means, an AC circuit of the rotary machine and a DC circuit of the power storage means convert electric energy in two directions. In a braking and auxiliary acceleration device for an internal combustion engine including an inverter circuit to be coupled and a control circuit for controlling the inverter circuit, a storage battery and a flywheel device are provided side by side as the power storage means. It includes a flywheel, a motor generator coupled to a rotating shaft of the flywheel, and a converter for matching a voltage of an electric terminal of the motor generator with a terminal voltage of the storage battery.

It is preferable that a distribution circuit for distributing the DC side input / output of the inverter circuit to the storage battery and the flywheel device is provided, and the control circuit includes means for controlling the distribution circuit. In the braking mode, the DC energy appearing on the DC output of the inverter circuit is preferentially stored in the flywheel device in the braking mode, and the stored energy of the flywheel device increases, and the terminal voltage of the converter becomes a predetermined value. and control means for storing the direct current energy to the storage battery when it exceeds V _1, the stored energy of the flywheel device is an auxiliary acceleration mode to the DC input of preferentially the inverter circuit with respect to the stored energy of the storage battery And the stored energy of the flywheel device becomes small, and the terminal voltage of the converter becomes It is desirable to include a control means for controlling the stored energy of the storage battery to provide the DC input of the inverter circuit when below value V _2.

The control circuit sets a braking mode when an operation for enabling the auxiliary braking (for example, by an auxiliary braking lever provided on a steering wheel of a driver's seat) is performed, and the rotation speed of the internal combustion engine is set to the rotating machine. A rotating magnetic field at a lower speed is applied to operate as a generator. The generated electric energy is converted by an inverter circuit into AC output energy of the rotating machine as a DC output and supplied to a storage battery. When the rotating machine operates as a generator, electric energy is regenerated to the storage battery and a braking force is applied to the vehicle.

When an auxiliary acceleration operation (for example, by an auxiliary acceleration lever provided on a steered wheel) is performed, the control circuit sets an auxiliary acceleration mode and causes the rotating machine to rotate at a speed exceeding the rotation speed of the internal combustion engine. A magnetic field is applied to operate the motor, and the inverter circuit is controlled to provide a DC output of the electric energy stored in the storage battery to the rotating machine as an AC output. As a result, a driving force is applied to the rotating shaft of the internal combustion engine, and the vehicle is accelerated.

The setting of the braking mode and the auxiliary acceleration mode is performed by a driving operation while the vehicle is running. When the braking mode is set, the control circuit supplies the DC energy from the inverter circuit to the motor generator of the flywheel device, rotates the flywheel coupled to the rotating shaft of the motor generator as the motor, and converts the electric energy into mechanical energy. Store as energy.

When the auxiliary acceleration mode is set, the motor generator is driven by the energy stored in the flywheel, and the generated electric energy is supplied to the inverter circuit. The inverter circuit converts the electric energy into AC energy suitable for the rotating machine, drives the rotating machine as an electric motor, and performs auxiliary acceleration of the vehicle.

The control circuit takes in the terminal voltage of the storage battery and the voltage of the electric terminal of the motor generator, controls the converter to match the voltages, and controls the supply and extraction of energy to and from the storage battery and the flywheel device.

The control circuit controls the distribution circuit, and distributes the DC input / output of the inverter circuit to either the storage battery or the motor generator of the flywheel device according to the set mode.

That is, when the control circuit sets the braking mode due to the operation of the auxiliary braking, the DC energy appearing on the DC side output of the inverter circuit is preferentially supplied to the motor generator of the flywheel device, The flywheel is driven and its energy is mainly stored in the flywheel. As the energy stored in the flywheel increases, the terminal voltage of the motor generator increases. The control circuit takes in the DC-side of the terminal voltage of the converter connected to the electric generator, when its value exceeds a predetermined value V _1, the DC energy from the inverter circuit to the storage battery by controlling the distribution circuit Switch to accumulate.

When the auxiliary acceleration mode is set in accordance with the driving operation, the motor generator is operated as a generator when the energy stored in the flywheel is large, and the DC energy generated by the energy stored in the flywheel is converted. The DC input of the inverter circuit is supplied in preference to the energy from the storage battery. DC energy supplied from the electric generator becomes smaller, when the DC-side terminal voltage of the converter falls below a predetermined value V _2, since the missing as an energy required for assisting the acceleration, the control distribution circuit battery The stored energy is applied to the DC input of the inverter circuit to perform auxiliary acceleration.

As described above, by providing the flywheel device and rationally distributing energy with the storage battery in accordance with the set mode, rapid energy storage and rapid energy release can be enabled, and braking can be performed. Thus, the energy generated can be effectively regenerated. In addition, the size of the storage battery can be reduced, the number of repetitions of charge / discharge of the storage battery can be reduced, the battery life can be prolonged, and the maintenance cycle of the battery can be prolonged.

[0023]

BEST MODE FOR CARRYING OUT THE INVENTION

[0024]

Next, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram showing a configuration of a main part of the apparatus of the embodiment of the present invention, FIG. 2 is a diagram showing an example of an electric circuit of the apparatus of the embodiment of the present invention, and FIG. FIG.

In the embodiment of the present invention, electric energy is bidirectionally converted between a rotating machine 2 connected to a rotating shaft of an internal combustion engine 1, a power storage means, an AC circuit of the rotating machine 2 and a DC circuit of the power storage means. And a control circuit 4 for controlling the inverter circuit 3. A storage battery 5 and a flywheel device 6 are provided side by side as power storage means.
The flywheel device 6 includes a flywheel 7,
A motor generator 8 coupled to the rotating shaft of the flywheel 7 and a converter 9 for matching the voltage of the electric terminals of the motor generator 8 with the terminal voltage of the storage battery 5 are included.

Further, there is provided a distribution circuit 11 for distributing the DC side input / output of the inverter circuit 3 to the storage battery 5 and the flywheel device 6, and the control circuit 4 includes means for controlling the distribution circuit 11.

In the braking mode, the flywheel device 6 preferentially accumulates DC energy appearing at the DC output of the inverter circuit 3 so that the energy stored in the flywheel device 6 increases. Control means for accumulating the DC energy in the storage battery 5 when the terminal voltage of the converter 9 exceeds a predetermined value V ₁ ; and in the auxiliary acceleration mode, the energy stored in the flywheel device 6 has priority over the energy stored in the storage battery 5. Inverter circuit 3
Of giving to the DC input, the control terminal voltage of the converter 9 accumulates energy of the flywheel device 6 is reduced is controlled to provide the stored energy of the storage battery 5 to a DC input of the inverter circuit 3 when below the predetermined value V ₂ Means.

On the input side of the flywheel device 6, a voltage detecting circuit 12 for detecting a DC voltage from the inverter circuit 3 is provided.
The flywheel device 6 includes a rotation speed sensor 13 that detects the rotation speed of the flywheel, and a CPU 14 that takes the output of the rotation speed sensor 13 and drives the converter 9 under the control of the control circuit 4. Built-in.

[0029] The control circuit 4, the voltage detection circuit 12 for detecting the voltage V _F of the flywheel device 6, the engine rotational speed sensor 15 for detecting the rotational speed of the internal combustion engine 1, a vehicle speed sensor 16 for detecting a vehicle speed, an accelerator An accelerator stroke sensor 18 for detecting the depression stroke of the pedal 17, a brake stroke sensor 19 for detecting the depression stroke of the brake pedal, a key switch 20, a voltage detector 21 for detecting the voltage of the storage battery 5, and a storage battery. The output of the current detector 22 for detecting the current of No. 5 is input.

In FIG. 2, Q _a , Q _b , Q _c , Q _d , Q _e and Q _f are switch elements, PWM is an open / close control signal generation circuit, CT is a semiconductor switch control circuit, H is a temperature sensor,
E ₁ and E ₂ are terminals of the storage battery 3, D / A is a digital / analog converter, CPU is a microprocessor, T _q
Is a torque control circuit, T ₁ is an accelerator pedal depression information input terminal, AMP is an operational amplifier, _Ex is an exhaust brake circuit, I / O is an interface circuit, KS is a switch linked with the key switch 20, and S ₁ is an auxiliary. acceleration operation switches, S ₂ is electric braking operation instruction switch, S ₃ exhaust brake switch, A ₁ and A ₂ are an accelerator pedal interlock switch, N ₁ and N ₂ are transmission
Neutral switch, CL ₁ and CL ₂ are clutch pedal interlock switch. The switches S ₁ , S ₂ and S ₃ are arranged at positions where the driver can easily operate, that is, positions where the left finger can operate the shaft of the steered wheels.

As shown in FIG. 3, the flywheel device 6 is accommodated in a housing having an explosion-proof structure in a state where the flywheel 7 and the motor generator 8 are connected, and is fixed to a chassis.

Next, the operation of the embodiment of the present invention configured as described above will be described.

The operation modes of the embodiment of the present invention include:
There are a start mode, a traveling mode, a braking mode, and an auxiliary acceleration mode.

FIG. 4 is a flowchart showing the flow of the control operation in the starting mode by the apparatus according to the embodiment of the present invention.

The control circuit 4 sets a start mode upon receiving a start signal of the internal combustion engine 1 by operating the key switch 20. In this starting mode, the distribution circuit 11 is always controlled to connect the storage battery 5 and the inverter circuit 3. Thereby, the DC energy of the storage battery 5 is converted into AC energy,
A gentle rotating magnetic field of about 60 rpm, which is about the idling rotation speed, is applied to the rotating machine 2. The rotating machine 2 is driven as an electric motor by the rotating magnetic field to apply a rotating force to the internal combustion engine 1.
At this time, the control circuit 4 takes in the output from the internal combustion engine rotation speed sensor 15. Since the starting forced rotation speed of the internal combustion engine 1 is about 60 rpm and the idling rotation speed after starting is about 500 rpm, it is determined whether or not the internal combustion engine 1 has exceeded, for example, 120 rpm. Set the driving mode.

FIG. 5 is a flow chart showing the flow of the control operation in the traveling mode by the apparatus according to the embodiment of the present invention.

When the driving mode is set, the control circuit 4 fetches the outputs of the accelerator stroke sensor 18, the brake stroke sensor 19, the internal combustion engine rotation speed sensor 15 and the vehicle speed sensor 16 to determine whether the braking operation has been performed.
It is determined whether an acceleration operation has been performed. The braking mode is set when the auxiliary braking operation is performed, and the auxiliary acceleration mode is set when the auxiliary acceleration operation is performed. When neither operation is performed, the traveling mode is maintained.

FIG. 6 is a flowchart showing the flow of the control operation in the braking mode by the apparatus according to the embodiment of the present invention.

[0039] When the control circuit 4 sets the braking mode, as a value indicating the stored energy of the flywheel device 6 the voltage detecting circuit 12 detects, captures terminal voltage value V _F of the DC side of the converter 9, setting it in advance Predetermined value V
_It is determined whether ₁ has been exceeded. If the output value V _F of the voltage detection circuit 12 smaller than the predetermined value V _1, since the stored energy of the flywheel device 6 has not yet reached a predetermined amount,
By controlling the distribution circuit 11, the DC output of the inverter circuit and the flywheel device 6 are connected to accelerate the rotation of the flywheel.

That is, the control circuit 4 controls the converter 9 via the CPU 14 built in the flywheel device 6, converts DC energy from the inverter circuit 3 into AC energy, and converts the motor generator 8 into a motor. Drive as
As a result, the flywheel 7 connected to the rotating shaft is accelerated, and the electric energy supplied to the motor generator 8 is stored as mechanical energy.

Under the control of the control circuit 4, the CPU 14 takes in the rotation speed of the flywheel 7 from the rotation speed sensor 13 and controls the rotating magnetic field of the motor generator. Thereby, the terminal voltage of the motor generator 8 is controlled according to the rotation speed of the flywheel, that is, the amount of stored energy, and the terminal voltage of the storage battery 5 is matched.

The output value V _F of the voltage detection circuit 12 exceeds a predetermined value V
If it is larger than _1, the energy stored in the flywheel device 6 has reached the upper limit, so the distribution circuit 11 is controlled to connect the DC side output of the inverter circuit 3 to the storage battery 5, and the storage battery 5 is connected to the inverter circuit 3 Accumulates the energy supplied from. At this time, the control circuit 4 compares takes the output from the voltage detector 21 and the current detector 22, and the terminal voltage V _B of the battery 5 and the charging reference voltage V _s1. If the terminal voltage V _B of the battery is greater than the charging reference voltage V _s1, the charge amount of the battery 5 so reaches the upper limit, undo control stops charging. If the terminal voltage V _B is lower than the charging reference voltage V _s1 , energy can be stored in the storage battery 5. Therefore, the energy storage in the storage battery 5 is continued until the terminal voltage V _B reaches the charging reference voltage V _s1 .

FIG. 7 is a flowchart showing the flow of the control operation in the auxiliary acceleration mode by the apparatus according to the embodiment of the present invention.

The control circuit 4 by setting the auxiliary acceleration mode according to the driving operation, the voltage detection circuit 12 takes in the voltage value V _F indicating the stored energy of the flywheel device 6 detected, which exceeds a predetermined value V ₂ which is set in advance Is determined. If the output value V _F of the voltage detection circuit 12 is greater than the predetermined value V _2, the fly since wheel device energy stored in the 6 exceeds a predetermined amount, and the flywheel device 6 controls the distribution circuit 11 inverter The circuit 3 is connected to the DC side.

At this time, the control circuit 4 drives the motor generator 8 by using the rotating force of the flywheel 7 as a generator,
The converter 9 is controlled by the CPU 14 to convert AC energy generated in the motor generator 8 into DC energy. The converted DC energy is supplied from the distribution circuit 11 to the inverter circuit 3, converted into AC energy, and supplied to the rotating machine 2. The rotating machine 2 is driven as an electric motor by the supply of the energy, and applies a rotating force to the internal combustion engine 1 to perform auxiliary acceleration. By this operation, the rotation speed of the flywheel 7 decreases.

The output value V _F of the voltage detection circuit 12 exceeds a predetermined value V
If it is smaller than _{2, the} amount of energy stored in the flywheel device 6 is small, so the distribution circuit 11 is controlled to connect the storage battery 5 to the DC side of the inverter circuit 3 and
Is supplied to the inverter circuit 3. The inverter circuit 3 converts this DC energy into AC energy and supplies it to the rotating machine 2. The rotating machine 2 is driven as an electric motor by the supply of the energy, and applies a rotating force to the internal combustion engine 1 to perform auxiliary acceleration.

At this time, the control circuit 4 controls the voltage detector 21
Uptake terminal voltage V _B of the battery 5 from the discharge reference voltage V _s2
Compare with The terminal voltage V _{B of the} storage battery 5 is equal to the discharge reference voltage V
If it is smaller than _s2 , the energy of the storage battery 5 is less than or equal to the predetermined amount, and the supply of energy from the storage battery 5 to the rotating machine 2 ends. If the terminal voltage V _B of the storage battery 5 is higher than the discharge reference voltage V _{s2, the} energy stored in the storage battery 5 is still left, so the energy supply to the rotating machine 2 is continued until the voltage falls below the discharge reference voltage V _s2 .

As described above, according to the device of the present invention, by providing the storage battery 5 and the flywheel device 6 in parallel, the surplus energy generated during braking can be stored in the flywheel device 6 in a short time and effectively regenerated. Can be.

FIG. 8 is a diagram for explaining the energy distribution during acceleration and braking of the vehicle by the embodiment of the present invention. As shown in the figure, the auxiliary acceleration mode set during starting or acceleration, until the stored energy of the flywheel device 6 is below a predetermined value V _2, the stored energy of the flywheel device 6 is the stored energy of the storage battery 5 Priority is given to the DC input of the inverter circuit 3. When the energy stored in the flywheel device 6 falls below the predetermined value V ₂ , the energy stored in the storage battery 5 is given to the DC input of the inverter circuit 3.

In the braking mode set at the time of deceleration, the energy stored in the flywheel device 6 is reduced to a predetermined value V _1.
To over, the DC energy appearing at the DC side output of the inverter circuit 3 is preferentially accumulated in the flywheel device 6, when it exceeds a predetermined value V _1, ie the stored energy of the flywheel device 6 has reached the upper limit At that time, the DC energy is stored in the storage battery 5.

[0051]

As described above, according to the present invention, rapid energy accumulation and rapid energy release accompanying the braking of the vehicle and the acceleration of the vehicle can be enabled, and the energy is generated during braking. Energy can be effectively regenerated. In addition, since the flywheel device shares part of the energy required for the vehicle, the size of the storage battery can be reduced, and the number of times of charging and discharging of the storage battery can be reduced, and the battery life can be prolonged. In addition, the maintenance period of the battery can be extended.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of a main part of an apparatus according to an embodiment of the present invention.

FIG. 2 is a diagram showing an example of an electric circuit of the device according to the embodiment of the present invention.

FIG. 3 is a diagram showing a mounting example of a flywheel device in the device according to the embodiment of the present invention.

FIG. 4 is a flowchart showing a flow of a control operation in a start mode by the apparatus according to the embodiment of the present invention.

FIG. 5 is a flowchart illustrating a flow of a control operation in a driving mode by the embodiment device of the present invention.

FIG. 6 is a flowchart showing a flow of a control operation in a braking mode by the apparatus according to the embodiment of the present invention.

FIG. 7 is a flowchart showing a flow of a control operation in an auxiliary acceleration mode by the apparatus according to the embodiment of the present invention;

FIG. 8 is a diagram for explaining energy distribution during acceleration and braking of a vehicle by the apparatus according to the embodiment of the present invention.

FIG. 9 is a block diagram showing a configuration of a main part of a conventional device.

FIG. 10 is a perspective view showing a mounting state of the braking and auxiliary acceleration device.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 internal combustion engine 2 rotating machine 3 inverter circuit 4 control circuit 5 storage battery 6 flywheel device 7 flywheel 8 motor generator 9 converter 11 distribution circuit 12 voltage detection circuit 13 rotation speed sensor 14 CPU 15 internal combustion engine rotation speed sensor 16 vehicle speed sensor 17 accelerator pedal 18 accelerator stroke sensor 19 brake stroke sensor 20 key switch 21 voltage detector 22 current detector

Claims (4)

[Claims] 1. An inverter circuit that bidirectionally converts electric energy and couples a rotating machine connected to a rotating shaft of an internal combustion engine, a power storage unit, and an AC circuit of the rotating machine and a DC circuit of the power storage unit. And a control circuit for controlling the inverter circuit, the braking and auxiliary acceleration device for an internal combustion engine, wherein a storage battery and a flywheel device are provided in parallel as the power storage means, the flywheel device includes a flywheel, Braking and auxiliary acceleration of an internal combustion engine, comprising: a motor generator coupled to a rotating shaft of the flywheel; and a converter for matching a voltage of an electric terminal of the motor generator with a terminal voltage of the storage battery. apparatus. 2. The internal combustion engine according to claim 1, further comprising a distribution circuit that distributes a DC input / output of said inverter circuit to said storage battery and said flywheel device, wherein said control circuit includes means for controlling said distribution circuit. Braking and auxiliary accelerator. 3. A means for controlling the distribution circuit preferentially stores DC energy appearing on the DC side output of the inverter circuit in the flywheel device in the braking mode, and the stored energy of the flywheel device increases. braking and auxiliary acceleration device for an internal combustion engine according to claim 2, further comprising a control means for storing in said storage battery that DC energy when the terminal voltage of the converter exceeds a predetermined value V _1. 4. The flywheel device according to claim 1, wherein said means for controlling said distributing circuit applies said stored energy of said flywheel device to a DC input of said inverter circuit in preference to stored energy of said storage battery in an auxiliary acceleration mode. internal combustion engine according to claim 2, wherein the terminal voltage of the converter stored energy decreases comprises a control means for controlling to provide the stored energy of the storage battery when below the predetermined value V ₂ to the direct current input of the inverter circuit Braking and auxiliary accelerator.