JPH06247186A - Auxiliary acceleration braking device - Google Patents

Abstract

PURPOSE:To provide a device which can smoothen rotational unevenness, and can make an internal combustion engine light in weight only with solftwear added by controlling a directly connected squirrel cage induction machine to be a generator when the revolution speed of the internal. combustion engine is in excess of an average revolution speed, and also to be a motor when the aforesaid revolution speed is less than the average revolution speed. CONSTITUTION:The device is equipped with a squirrel cage three phase induction machine 2 the rotor of which is directly connected to the main shaft 1 of an internal combustion engine 1, a secondary battery circuit 3, an inverter circuit 4, a rotation sensor 6, a converter control circuit 5, a capacitor 7, a semiconductor switching circuit 12, a resistor 11, an output detection circuit 13, a current detector 15 and with a switch control circuit 14. The inverter control circuit 5 takes in the momentary revolution speed of the internal combustion engine 1 from the revolution sensor 6 for the period of several seconds, so that the difference is left for judgement. When the momentary revolution speed is in excess of an average revolution speed, the three phase squirrel induction machine 2 is controlled to be a generator by controlling the revolution speed of a rotating magnetic field, and when the momentary revolution speed is within the average revolution speed, the aforesaid machine is controlled to be a motor so as to be accelerated. Thus, fluctuation in momentary revolution speed is drawn close to zero by means of negative feedback.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention is used in an automobile having an internal combustion engine. The present invention relates to an auxiliary accelerating braking device that applies a braking force or an accelerating force by a squirrel cage polyphase induction machine directly connected to an internal combustion engine. The present invention relates to a device for suppressing uneven rotation of an internal combustion engine by an auxiliary acceleration braking device.

[0002]

The applicant of the present application directly connects a rotor of a cage-type multi-phase induction machine to a main shaft of an internal combustion engine that drives an axle of an automobile,
The current supplied from the DC power source is converted into a multi-phase alternating current by an inverter circuit and is supplied to the stator of this squirrel cage polyphase induction machine, and a rotating magnetic field is given to this squirrel cage polyphase induction machine, and the internal combustion engine A rotation sensor that detects the rotation speed,
An auxiliary acceleration braking device has been proposed which includes a control circuit which takes in the output of the rotation sensor and the output of the operating end and gives a control output to the inverter circuit to control the rotation speed of the rotating magnetic field. This device is disclosed in International Publication WO88 / 06197.
(Application No. PCT / JP88 / 00157) has detailed description.

In this device, the rotation speed of the rotor of the cage multiphase induction machine directly connected to the rotation shaft of the internal combustion engine is determined from the rotation speed of the rotating magnetic field generated by the stator of the cage multiphase induction machine. When it is large, the squirrel cage polyphase induction machine acts as a generator to generate braking force, and when it is small, the squirrel cage polyphase induction machine acts as an electric motor to generate acceleration force. And
By adjusting the difference (slip amount) between the physical rotation speed of the rotor and the rotation speed of the rotating magnetic field, the magnitudes of the braking force and the acceleration force can be adjusted.

An automobile equipped with this device is a hybrid vehicle having an internal combustion engine and an electric motor as drive sources, and has an excellent feature that energy generated by braking can be regenerated and utilized as electric energy. A vehicle equipped with this device is referred to as "HIMR" by the applicant of the present application.
It has been sold on a trial basis under the name of and has been highly evaluated as a low-pollution vehicle. Furthermore, improvement studies are still underway.

On the other hand, it is known that the internal combustion engine vibrates due to uneven rotation of the main shaft. In particular, the vibration is large at the low speed rotation. This is because the internal combustion engine obtains the rotational torque by the explosive energy that is intensively generated during a very short time of the explosion stroke of its rotation cycle (2 cycles in the case of a 4-cycle engine), and rotational braking is performed in other strokes. This is because it acts to give. In order to reduce this rotational unevenness, it has long been practiced to increase the size of the flywheel connected to the rotary shaft and to connect a plurality of cylinders by shifting their stroke phases in order.

A retarder (generator) connected to the internal combustion engine in order to suppress vibration due to uneven rotation of the internal combustion engine.
It has been considered that by utilizing the above, the fine control is performed so as to apply the braking force at a time when the instantaneous rotation speed is large in the rotation cycle of the internal combustion engine. These conventional techniques are disclosed in JP-A-60-16.
9639, JP-A-55-1431, JP-B-62-18450, and the like.

[0007]

Although this conventional technique is an effective technique in principle, it is difficult to put it into practical use.
It requires relatively expensive hardware such as a special retarder control circuit in the low-speed rotation region of the internal combustion engine and a large-current switch circuit whose opening / closing cycle fluctuates according to changes in the rotation speed. This is because it cannot be realized at a reasonable cost. Further, these prior arts are merely auxiliary devices for reducing the rotation unevenness of the internal combustion engine, and the rotation unevenness always remains even by these devices, and it is impossible to control the rotation unevenness of the internal combustion engine to zero. is there.

The present invention focuses on applying the above-mentioned conventional technique to an auxiliary accelerating braking system using a cage-type multiphase induction machine.

An object of the present invention is to realize an apparatus for economically reducing vibration of an internal combustion engine due to uneven rotation.
SUMMARY OF THE INVENTION It is an object of the present invention to realize a device that gradually reduces vibration due to uneven rotation without adding any hardware, only by adding software for a control circuit. Another object of the present invention is to provide a device capable of theoretically compressing the rotational unevenness to zero by the negative feedback automatic control. It is an object of the present invention to provide a device capable of making the flywheel extremely small and reducing the weight of the internal combustion engine itself.

[0010]

The first aspect of the present invention is to provide a squirrel-cage polyphase induction machine in which a rotor is directly connected to a main shaft of an internal combustion engine for driving an axle of an automobile, a DC power supply, and a DC power supply. Circuit for applying a rotating magnetic field to the stator of the squirrel-cage multiphase induction machine by the applied current, a rotation sensor for detecting the rotation speed of the internal combustion engine, and the inverter for taking in the output of the rotation sensor and the output of the operating end. In a supplementary acceleration braking device comprising a control circuit for giving a control output to a circuit and controlling the rotation speed of the rotating magnetic field, the control circuit comprises:
Means for calculating an average rotation speed (N0) from the instantaneous rotation speed (N) of the internal combustion engine, and a means for calculating the average rotation speed (N0) of the internal combustion engine when the average rotation speed (N0) exceeds the average rotation speed (N0) (N
> N0) so that the squirrel cage polyphase induction machine becomes a generator, the squirrel cage multiphase induction machine is used when the instantaneous rotation speed of the internal combustion engine is lower than the average rotation speed (N0) (N <N0). So as to be an electric motor, and means for controlling the rotation speed of the rotating magnetic field.

In the means for controlling the rotating magnetic field, the squirrel-cage polyphase as a function of the difference (N-N0) between the instantaneous rotational speed (N) of the internal combustion engine and the average rotational speed (N0) of the internal combustion engine. It includes a control means for changing the slip amount (S) of the induction machine.

A second aspect of the present invention is a squirrel cage multi-phase induction machine having a rotor directly connected to a main shaft of an internal combustion engine for driving an axle of an automobile, a direct current power source, and a current supplied from the direct current source. Inverter circuit for applying a rotating magnetic field to the stator of a multi-phase induction machine, a rotation sensor for detecting the rotation speed of the internal combustion engine, and the output of the rotation sensor and the output of the operating end are provided to give a control output to the inverter circuit. In an auxiliary acceleration braking device including a control circuit for controlling the rotation speed of the rotating magnetic field, another rotation sensor mounted at a position opposite to the mounting position of the rotation sensor via the crankshaft of the internal combustion engine. The control circuit is provided with means for detecting a phase difference (ΔP) between the two rotation sensors, and the phase difference is larger than a first predetermined value (ΔP1) (ΔP> Δ).
P1) when the rotation speed of the rotating magnetic field is controlled so that the squirrel cage polyphase induction machine becomes a generator for a short time during the rotation cycle of the internal combustion engine.

The control circuit includes a second predetermined value (ΔP2) in which the phase difference is smaller than the first predetermined value (ΔP1).
When it is below (ΔP <ΔP2), a means for controlling the rotation speed of the rotating magnetic field is included so that the squirrel cage polyphase induction machine becomes an electric motor for a short time in the rotation cycle of the internal combustion engine.

A third aspect of the present invention is a cage-type multi-phase induction machine having a rotor directly connected to a main shaft of an internal combustion engine for driving an axle of an automobile, a direct current power source, and a current supplied from the direct current source. Inverter circuit for applying a rotating magnetic field to the stator of a multi-phase induction machine, a rotation sensor for detecting the rotation speed of the internal combustion engine, and the output of the rotation sensor and the output of the operating end are provided to give a control output to the inverter circuit. In the auxiliary acceleration braking device including a control circuit for controlling the rotation speed of the rotating magnetic field, the control circuit includes means for calculating an average rotation speed (N0) from an instantaneous rotation speed (N) of the internal combustion engine, When the average rotation speed (N0) of the internal combustion engine is less than or equal to a first value (N1) and the instantaneous rotation speed (N) of the internal combustion engine exceeds a second value (N2) that is smaller than the first value. (N2 < , N0 to <N1), over the short time in the rotation cycle of the internal combustion engine, characterized in that it comprises a means for the cage polyphase induction machine controls the rotating magnetic field so that the generator.

When the instantaneous rotation speed (N) of the internal combustion engine falls below a third value (N3) which is smaller than the second value (N2) (N <N3), the control circuit includes the internal combustion engine. Means for controlling the rotating magnetic field so that the squirrel cage polyphase induction machine becomes an electric motor for a short period of time in the rotation cycle.

[0016]

Operation: The average rotational speed (N
0) is 240 rpm as an example. This is 4 revolutions per second. Assuming a six-cylinder in-line internal combustion engine, each cylinder has an explosion stroke and a compression stroke once every two revolutions, so at this rotational speed there are twelve explosions per second and twelve compressions per second. That is, the instantaneous rotation speed increases 12 times per second, and the instantaneous rotation speed decreases 12 times per second.
At the timing corresponding to the rise and fall of the instantaneous rotation speed, the rotation speed of the rotating magnetic field of the squirrel cage polyphase induction machine is controlled to be faster or slower than the physical rotation speed of the rotor, and the fluctuation of the instantaneous rotation speed is controlled. Is controlled to suppress.

Further, the difference between the rotational speed of the rotating magnetic field and the physical rotational speed of the rotor, that is, the slip amount, is controlled by negative feedback according to the magnitude of the difference between the instantaneous rotational speed of the rotor and the average rotational speed. It can be performed. By appropriately setting the control gain and the integration time constant of this negative feedback control, the fluctuation of the instantaneous rotation speed approaches zero as much as possible, and the physical instantaneous rotation speed of the rotor can be made equal to its average rotation speed. . It is also possible to shorten the response time by performing differential control so that the value of the slip amount is increased or decreased according to the amount of change in the difference between the instantaneous rotation speed and the average rotation speed.

In principle, this eliminates the need for a flywheel connected to the main shaft of the internal combustion engine. In the device of the present invention, while applying braking to the rotating shaft, the rotating energy is converted into electric energy for regeneration to the battery, and while driving is applied to the rotating shaft, the electric energy is converted into rotating energy. It will be. This is an action equivalent to the action in which the flywheel transfers kinetic energy.

By reducing the weight of the flywheel,
The weight of the internal combustion engine can be reduced.

The above numerical value example is 240 rpm, but if this is 10 times as high as 2400 rpm, it is 12 per second.
It is necessary to control the rotating magnetic field 0 times. The operation speed of the program control circuit can follow this level with a sufficient margin. The maximum rotation speed of the internal combustion engine is 10,000 rp
Even if m, the above control can be followed in the range of the total rotation speed of the internal combustion engine, and the control delay does not matter.

The device of the present invention does not require any additional hardware. It can be realized by additionally changing the software of the control circuit.

[0022]

Embodiments of the present invention will now be described with reference to the drawings. FIG. 1 is a block diagram showing the basic configuration of the embodiment of the present invention.

The apparatus according to the embodiment of the present invention comprises a cage type multi-phase induction machine 2 having a rotor directly connected to a main shaft of an internal combustion engine 1 for driving an axle of an automobile, a secondary battery circuit 3 as a DC power source, and a secondary battery circuit 3. An inverter circuit 4 that applies a rotating magnetic field to the stator of the squirrel cage induction machine 2 by the current supplied from the secondary battery circuit 3, a rotation sensor 6 that detects the rotation speed of the internal combustion engine 1, and the output and operation of this rotation sensor 6. An inverter control circuit 5 that takes in the output of the end and gives a control output to the inverter circuit 4 to control the rotation speed of the rotating magnetic field, a capacitor 7 connected to the output side of the inverter circuit 4, a semiconductor switch circuit 1
2, a resistor 11, a detection circuit 13 for detecting the output voltage of the inverter circuit 4, a current detector 15 for detecting a current change of the resistor 11, and a switch control circuit 14 for controlling the semiconductor switch circuit 12. Prepare

FIG. 2 is a diagram showing an electric circuit of the apparatus of the present invention, and FIG. 3 is a diagram showing an example of the arrangement of the operating lever in the driver's seat according to the embodiment of the present invention.

In this embodiment, the squirrel cage polyphase induction machine 2 has three phases. The secondary battery circuit 3 and the squirrel cage polyphase induction machine 2 are connected by an inverter circuit 4. Secondary battery circuit 3
The negative terminal E _{2 of} is connected to the common potential of this vehicle.

The inverter circuit 4 has switching elements Qa, Qb, Qc, Q connected between the respective phase terminals of the squirrel cage multiphase induction machine 2 and the positive and negative terminals of the secondary battery circuit 3.
Including d, Qe, and Qf. This switch element Qa, Qb,
Each of Qc, Qd, Qe, and Qf is composed of a transistor and a diode connected in parallel in the opposite direction between the collector and the emitter of the transistor. further,
In the inverter circuit 4, the switching elements Qa, Q
An opening / closing control signal generation circuit PWM for giving an opening / closing control signal to the control electrodes b, Qc, Qd, Qe, and Qf is included.

The pulse signal output from the rotation sensor 6 becomes an analog signal representing the rotation speed by the digital / analog conversion circuit DA ₁ . This analog signal is the operational amplifier A
It is connected to one input of MP and is added or subtracted according to the control reference corresponding to the slip amount generated from the digital-analog conversion circuit DA ₂ and its polarity. The output of the operational amplifier AMP is the above-mentioned switching control signal generation circuit P.
It is given to the WM as an output frequency control signal of the inverter circuit 4. That is, a negative feedback servo control loop is formed by the squirrel cage polyphase induction machine 2, the rotation sensor 6, the digital / analog conversion circuit DA ₁ , the operational amplifier AMP and the inverter circuit 4.

The control reference corresponding to the slip amount is added to the negative feedback servo control loop, and the signals required for the control means for generating the slip amount will be described. This control means is composed of each circuit located at the lower left of FIG.
Microprocessor CPU, interface circuit IO,
Torque control circuit Tq, switches A ₁ and A ₂ linked to the accelerator pedal of the automobile, switches N ₁ and N ₂ also indicating the neutral of the transmission, and switches Cl ₁ and C also linked to the clutch pedal.
l ₂ , a first switch S ₁ operated by the driver, a second switch S ₂ operated by the driver, a switch KS interlocking with a start key switch of the internal combustion engine 1, and a digital-analog conversion circuit DA ₂ . . The switch S ₃ is an exhaust brake switch that has been conventionally provided,
It is connected to the exhaust brake circuit E _X.

The first switch S ₁ is a switch for instructing operation of auxiliary acceleration, and the second switch S ₂ is a switch for instructing operation of electric braking. In the present embodiment, the first switch S ₁ and the second switch S ₂ are designed so that they can be operated by a single operating lever 1 provided on the shaft of the handle, and the operating lever 1 is turned off. The switches S ₁ and S ₂ are both open in the position of, and the switch S ₁ is closed in the acceleration position. Further, there are four braking positions, each of which is configured to sequentially close a plurality of contacts indicated by the switch S ₂ . The four braking positions allow the driver to adjust the degree of electric braking.

When the operating lever 1 is placed in the acceleration position, the accelerator pedal depression information is given to the terminal T _{1 of} FIG. 2 so that the degree of the acceleration is determined by the depression amount of the accelerator pedal. It is configured to send a signal from Tq to the interface IO. Further, the output from the temperature sensor H arranged in the resistor 11 is input to the interface IO.

A technique for replacing the secondary battery circuit 3 with a large-capacity capacitor (electrostatic capacity) has been separately proposed, and the present invention can be applied to this technique.

(First Embodiment) The first embodiment of the present invention is shown in FIG.
In the inverter control circuit 5 shown in FIG. 1, a means for calculating the average rotation speed (N0) from the instantaneous rotation speed (N) of the internal combustion engine 1 and the instantaneous rotation speed (N) of the internal combustion engine 1 are calculated as the average rotation speed (N0). When it exceeds (N> N0), the squirrel-cage polyphase induction machine 2 becomes a generator, and when the instantaneous rotation speed of the internal combustion engine 1 falls below the average rotation speed (N0) (N <
No. 0) includes means for controlling the rotation speed of the rotating magnetic field so that the squirrel cage multiphase induction machine 2 becomes an electric motor, and the means for controlling the rotation speed of the rotating magnetic field includes instantaneous rotation of the internal combustion engine 1. The speed (N) and the average rotational speed of the internal combustion engine (N
Control means for changing the slip amount (S) of the squirrel cage polyphase induction machine 2 as a function of the difference (N-N0) from 0).

Next, the operation of the first embodiment of the present invention thus constructed will be described. FIG. 4 is a flow chart showing the flow of control operation in the first embodiment of the present invention.

The inverter control circuit 5 fetches the instantaneous rotation speed (N) of the internal combustion engine 1 from the rotation sensor 6 for several seconds, integrates the fetched instantaneous rotation speed (N) and averages it to calculate the average rotation speed (N0). Then, the difference between the instantaneous rotation speed (N) and the average rotation speed (N0) is calculated to determine whether the instantaneous rotation speed (N) and the average rotation speed (N0) are equal.

Instantaneous rotation speed (N) and average rotation speed (N
When 0) is equal to each other, it is assumed that the rotation speed is controlled to have no fluctuation, and the instantaneous rotation speed (N) is fetched again, and the same operation is repeated.

Instantaneous rotation speed (N) and average rotation speed (N
0) is not equal, it is determined whether or not the instantaneous rotation speed (N) exceeds the average rotation speed (N0). When it exceeds (N> N0), the cage multiphase induction machine 2 To control the rotation speed of the rotating magnetic field so that it becomes a generator, and electrically brake.

The instantaneous rotation speed (N) is the average rotation speed (N
When it does not exceed 0) (N <N0), the rotation speed of the rotating magnetic field is controlled so that the squirrel cage polyphase induction machine 2 becomes an electric motor, and the electric acceleration is performed.

Next, the slip amount (S: difference between the instantaneous rotation speed (N) and the average rotation speed (N0) of the internal combustion engine 1) caused by such braking or acceleration operation is calculated and the integrated value (∫ Sdt) is accumulated and held, and the integrated value is given to the inverter circuit 4 to change the slip amount (S) of the squirrel cage multiphase induction machine 2.

Thus, the negative feedback control is performed according to the magnitude of the difference between the instantaneous rotation speed (N) and the average rotation speed (N0), and the control gain of the negative feedback control is appropriately set to obtain the instantaneous rotation. Velocity fluctuations can approach zero.

The rotation speed of the internal combustion engine 1 is 240 rpm to 1
Although a speed of 0000 rpm is conceivable, the calculation speed of the inverter control circuit can be followed with a sufficient margin, and thus negative feedback control can be performed without causing a control delay in the region of the total rotation speed of the internal combustion engine 1.

It is desirable that the integral time constant for calculating the integral value of the slip amount S is controlled to be changed according to the rotation speed of the internal combustion engine.

(Second Embodiment) FIG. 5 is a block diagram showing the basic construction of the second embodiment of the present invention.

The second embodiment of the present invention is, in addition to the configuration of the first embodiment, another rotation sensor mounted at a position opposite to the mounting position of the rotation sensor 6 via the crankshaft of the internal combustion engine 1. 16 is provided, and means for detecting the phase difference (ΔP) between the two rotation sensors 6 and 16 is provided in the inverter control circuit 5, and when the phase difference is larger than a first predetermined value (ΔP1) (ΔP> ΔP1) It includes means for controlling the rotation speed of the rotating magnetic field so that the squirrel cage polyphase induction machine 2 becomes a generator for a short time in the rotation cycle of the internal combustion engine 1, and the phase difference is the first phase difference. When the value is smaller than the second predetermined value (ΔP2) smaller than the predetermined value (ΔP1) (ΔP <ΔP2), the squirrel cage multiphase induction machine 2 becomes an electric motor for a short time in the rotation cycle of the internal combustion engine 1. Including means for controlling the rotation speed of the rotating magnetic field .

Next, the operation of the second embodiment of the present invention thus constructed will be described. FIG. 6 is a flow chart showing the flow of control operation in the second embodiment of the present invention.

First, the rotation sensor 6 takes in the instantaneous rotation speed of the internal combustion engine 1, and the rotation sensor 16 takes in the instantaneous rotation speed of the crankshaft on the side opposite to the mounting position of the rotation sensor 6, and these two rotation sensors 6 And the phase difference (ΔP) of 16 is calculated.

Then, the calculated phase difference (ΔP) is compared with a predetermined first predetermined value (ΔP1), and when the phase difference (ΔP) is larger than the first predetermined value (ΔP1) (ΔP) > ΔP1), the inverter circuit 4 is operated so that the squirrel cage polyphase induction machine 2 functions as a generator for a short time in the rotation cycle of the internal combustion engine 1, and the rotation speed of the rotating magnetic field is controlled to be electrically controlled. Apply braking.

The phase difference (ΔP) is the first predetermined value (ΔP1)
When it is equal to or smaller than (ΔP ≧ ΔP1), the phase difference (ΔP) is compared with a second predetermined value (ΔP2) smaller than the first predetermined value (ΔP1).

The phase difference (ΔP) is the second predetermined value (ΔP2)
When it exceeds, it is determined that the instantaneous rotation speed does not change and the two rotation sensors 6 and 16 capture the instantaneous rotation speed again, and the same operation is repeated.

The phase difference (ΔP) is the second predetermined value (ΔP2).
When it is lower than, the inverter circuit 4 is operated so that the squirrel cage polyphase induction machine 2 becomes an electric motor for a short time in the rotation cycle of the internal combustion engine 1 to control the rotating magnetic field to electrically accelerate.

In this way, in the second embodiment as well, as in the first embodiment, the control gain of the negative feedback control can be appropriately set, and the fluctuation of the instantaneous rotation speed can be brought close to zero.

(Third Embodiment) The third embodiment of the present invention is shown in FIG.
In the inverter control circuit 5 shown in FIG. 3, a means for calculating the average rotation speed (N0) from the instantaneous rotation speed (N) of the internal combustion engine 1 and the average rotation speed (N0) of the internal combustion engine 1 have the first value (N0).
1) or less and when the instantaneous rotation speed (N) of the internal combustion engine 1 exceeds a second value (N2) smaller than the first value (N2 <N, N0 <N1), the rotation of the internal combustion engine 1 It includes means for controlling the rotating magnetic field so that the squirrel cage polyphase induction machine 2 becomes a generator for a short time in the cycle, and further, the instantaneous rotation speed (N) of the internal combustion engine 1 is the second rotation speed. When the value is below the third value (N3), which is smaller than the value (N2) (N <N3), the squirrel cage polyphase induction machine 2 becomes an electric motor for a short time in the rotation cycle of the internal combustion engine 1. It includes means for controlling the rotating magnetic field.

Next, the operation of the third embodiment of the present invention thus constructed will be described. FIG. 7 is a flow chart showing the flow of control operation in the third embodiment of the present invention.

First, the rotation sensor 6 takes in the instantaneous rotational speed (N) of the internal combustion engine 1, calculates the average rotational speed (N0) from the taken in instantaneous rotational speed (N), and calculates this average rotational speed (N0). Compare with the instantaneous rotation speed (N).

If the average rotation speed (N0) of the internal combustion engine 1 exceeds a predetermined first value (N1), it is assumed that the instantaneous rotation speed (N) is controlled to be unchanged. The instantaneous rotation speed (N) is taken again and the same operation is repeated.

The average rotation speed (N0) is the first value (N1).
If it is below, it is further compared whether or not the instantaneous rotation speed (N) exceeds a second value (N2) smaller than the first value (N1).

When the instantaneous rotational speed (N) exceeds the second value (N2) (N2 <N, N0 <1), the internal combustion engine 1
For a short time in the rotation cycle of, the inverter circuit 4 is operated so that the squirrel cage multiphase induction machine 2 becomes a generator, and the electric braking is performed.

When the instantaneous rotation speed (N) is smaller than the second value (N2), the instantaneous rotation speed (N) and the third value (N3) which is smaller than the second value (N2) are set. To compare.

If the instantaneous rotation speed (N) does not exceed the third value (N3), it is considered that there is no fluctuation in the rotation speed.
The instantaneous rotation speed (N) is taken in again, and the same operation is repeated thereafter.

When the instantaneous rotational speed (N) is smaller than the third value (N3) (N <N3), the squirrel cage multiphase induction machine 2 drives the electric motor for a short time in the rotation cycle of the internal combustion engine 1. The inverter circuit 4 is operated to control the rotating magnetic field to electrically accelerate.

In the third embodiment, like the first and second embodiments, the control gain of the negative feedback control can be appropriately set and the fluctuation of the instantaneous rotation speed can be brought close to zero.

[0061]

As described above, according to the present invention, the fluctuation of the instantaneous rotational speed caused by the combustion of the internal combustion engine can be made as close as possible to zero by software, and the discomfort caused by vibration can be eliminated. effective.

Further, since the kinetic energy can be electrically taken in and out over the entire range of the rotational speed of the internal combustion engine, there is an effect that the weight of the flywheel can be reduced.

[Brief description of drawings]

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

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

FIG. 3 is a diagram showing an example of arrangement of operation levers in a driver's seat according to the device of the embodiment of the present invention.

FIG. 4 is a flowchart showing a flow of control operation in the first embodiment of the present invention.

FIG. 5 is a block diagram showing the basic configuration of a second embodiment device of the present invention.

FIG. 6 is a flowchart showing the flow of control operation in the second embodiment of the present invention.

FIG. 7 is a flowchart showing the flow of control operation in the third embodiment of the present invention.

[Explanation of symbols]

 1 Internal Combustion Engine 2 Cage Type Multi-Phase Induction Machine 3 Secondary Battery Circuit 4 Inverter Circuit 5 Inverter Control Circuit 6, 16 Rotation Sensor 7 Capacitor 11 Resistor 12 Semiconductor Switch Circuit 13 Detection Circuit 14 Switch Control Circuit 15 Current Detector

Claims (3)

[Claims] 1. A squirrel-cage polyphase induction machine in which a rotor is directly connected to a main shaft of an internal combustion engine for driving an axle of an automobile, a dc power supply, and a current supplied from the dc power supply. An inverter circuit for applying a rotating magnetic field to the stator, and a rotation sensor for detecting the rotation speed of the internal combustion engine,
In an auxiliary acceleration braking device including a control circuit that takes in the output of this rotation sensor and the output of the operating end and gives a control output to the inverter circuit to control the rotation speed of the rotating magnetic field, wherein the control circuit is the internal combustion engine. A means for calculating an average rotational speed (N0) from the instantaneous rotational speed (N); and a cage-shaped multi-cage when the instantaneous rotational speed (N) of the internal combustion engine exceeds the average rotational speed (N0) (N> N0). When the instantaneous rotation speed of the internal combustion engine is below the average rotation speed (N0) so that the phase induction machine becomes a generator (N <N
0) means for controlling the rotation speed of the rotating magnetic field so that the squirrel-cage polyphase induction machine becomes an electric motor, an instantaneous rotation speed (N) of the internal combustion engine and an average rotation speed (N0) of the internal combustion engine. And a control means for changing the slip amount (S) of the squirrel-cage polyphase induction machine as a function of the difference (N-N0) between the auxiliary acceleration braking device and the auxiliary acceleration braking device. 2. A squirrel-cage polyphase induction machine having a rotor directly connected to a main shaft of an internal combustion engine for driving an axle of an automobile, a DC power supply, and a squirrel-cage multiphase induction machine driven by a current supplied from the DC power supply. An inverter circuit for applying a rotating magnetic field to the stator, and a rotation sensor for detecting the rotation speed of the internal combustion engine,
In an auxiliary acceleration braking device including a control circuit that takes in the output of the rotation sensor and the output of the operating end and gives a control output to the inverter circuit to control the rotation speed of the rotating magnetic field, the mounting position of the rotation sensor is Another rotation sensor mounted on the opposite side of the crankshaft of the internal combustion engine is provided, and the control circuit includes means for detecting a phase difference (ΔP) between the two rotation sensors and the phase difference. Greater than the first predetermined value (ΔP1) (ΔP
> ΔP1), means for controlling the rotation speed of the rotating magnetic field so that the squirrel cage polyphase induction machine becomes a generator for a short time in the rotation cycle of the internal combustion engine, and the phase difference is the first When the value is smaller than the second predetermined value (ΔP2) smaller than the predetermined value (ΔP1) (ΔP <ΔP2), the squirrel cage multiphase induction machine becomes an electric motor for a short time in the rotation cycle of the internal combustion engine. And a means for controlling the rotation speed of the rotating magnetic field. 3. A squirrel cage multiphase induction machine having a rotor directly connected to a main shaft of an internal combustion engine for driving an axle of an automobile, a DC power supply, and a squirrel cage multiphase induction machine by a current supplied from the DC power supply. An inverter circuit for applying a rotating magnetic field to the stator, and a rotation sensor for detecting the rotation speed of the internal combustion engine,
In an auxiliary acceleration braking device, comprising: a control circuit that takes in the output of the rotation sensor and the output of the operating end and gives a control output to the inverter circuit to control the rotation speed of the rotating magnetic field, wherein the control circuit includes the internal combustion engine. Means for calculating an average rotation speed (N0) from the instantaneous rotation speed (N) of the internal combustion engine, and the average rotation speed (N0) of the internal combustion engine is a first value (N0).
1) or less and when the instantaneous rotation speed (N) of the internal combustion engine exceeds a second value (N2) smaller than the first value (N2 <N, N0 <N1), the rotation of the internal combustion engine Means for controlling the rotating magnetic field so that the squirrel cage polyphase induction machine becomes a generator for a short period of time in the cycle; and the instantaneous rotation speed (N) of the internal combustion engine is the second value (N).
When the value is below a third value (N3), which is smaller than 2) (N <N3), the rotating magnetic field is adjusted so that the squirrel cage polyphase induction machine becomes an electric motor for a short time in the rotation cycle of the internal combustion engine. And a means for controlling the auxiliary acceleration braking device.