JPH05176405A - Automobile provided with auxiliary power brake unit - Google Patents

Abstract

PURPOSE:To suppress noise and black smoke using electric power at the time of starting. CONSTITUTION:The automobile provided with auxiliary power brake unit comprises an engine controller 2 for controlling the rotational speed of an internal-combustion engine 1, a speed controller 5 for automatically controlling a clutch 3 and a speed changer 4, a squirrel-cage induction machine 6 for imparting auxiliary power and auxiliary brake force to the internal-combustion engine 1, and a rotating field controller 7 for controlling the rotating field to be applied on the squirrel-cage induction machine 6, wherein the squirrel-cage induction machine 6 is fixed to a rotary shaft between the clutch 3 and the speed changer 4 thus controlling the rotating field controller 7, the engine controller 2 and the speed changer 5 while interlocking. According to the constitution, smooth starting is realized, service life of clutch is prolonged and downsizing is realized for the internal-combustion engine and the clutch.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to electric auxiliary power and auxiliary braking for automobiles. INDUSTRIAL APPLICABILITY The present invention is used in a vehicle in which an internal combustion engine and an auxiliary power braking device are connected.

[0002]

The applicant of the present application has disclosed an invention relating to an auxiliary power braking system in which a squirrel-cage induction machine is used in combination with an internal combustion engine (W
O-88 / 06107 gazette, hereinafter referred to as "prior invention"). This prior invention is a structure in which a squirrel cage induction machine is directly connected to a flywheel of an internal combustion engine, and an auxiliary power is generated by applying a rotating magnetic field having a rotation speed higher than the rotation speed to the squirrel cage induction machine, and conversely. The auxiliary braking force is generated by applying a rotating magnetic field having a rotation speed lower than the rotation speed. When the auxiliary braking force is being generated, the secondary battery can regenerate the electric energy generated from the squirrel cage induction machine.

Regarding the invention of this earlier application, the applicant of the present application
As a result of repeated tests as MR (Higher Earl), practical aircraft were manufactured, and passengers are now used as vehicles for urban fixed-distance buses that frequently start and stop. .

[0004]

It has been confirmed from the above-mentioned tests that the apparatus of the invention of the prior application can provide a vehicle with low fuel consumption, low starting noise, and low black smoke contained in exhaust gas at the time of starting. However, further improvements have been proposed. The present invention relates to the improvement.

The object of the present invention is to downsize an internal combustion engine, downsize and simplify a clutch, and reduce noise and black smoke at the time of starting.

[0006]

According to the present invention, a squirrel cage induction machine is fixedly mounted on a rotating shaft between a clutch and a transmission.

That is, according to the present invention, a squirrel cage induction machine is mounted on a rotating shaft between a clutch and the transmission, and the rotating magnetic field control device, the engine control device, and the speed change control device interlock the controls. Means are included.

Further, the rotating magnetic field control means includes means for setting an independent start mode in accordance with a driving operation input, and in the independent start mode, the rotating magnetic field control means controls the shift control device via the interlocking control means. On the other hand, means for transmitting a signal for disengaging the clutch and setting the transmission to the starting gear, and means for accelerating the squirrel cage induction machine from zero speed to a speed corresponding to the idling rotation speed of the internal combustion engine in accordance with the driving operation input. And means for transmitting a signal for setting the clutch in an engaged state via the interlocking control means at the corresponding speed.

[0009]

A squirrel cage induction machine is provided between the clutch and the transmission, and the rotating magnetic field control device for the squirrel cage induction machine, the shift control device for controlling the clutch and the transmission, and the engine control device for controlling the internal combustion engine are interlocked with each other. This further reduces the size of the internal combustion engine, simplifies the clutch, and reduces black smoke when starting. That is, the internal combustion engine can be disengaged by the clutch at the time of starting, and the vehicle can be started only by the squirrel cage induction machine. This eliminates the need for delicate clutch control at the time of starting, so that the clutch can be of a small size and simple structure such as a dry clutch. Further, this can reduce the black smoke contained in the exhaust gas. With this configuration, there is no problem in charging the battery when the vehicle is stopped. That is, when the battery needs to be charged while the vehicle is stopped, the clutch is brought into the engaged state and the transmission is set to neutral. Battery consumption due to not using the internal combustion engine when starting can be supplemented by forced charging by the internal combustion engine when the vehicle is stopped. That is, when the vehicle is stopped, the rotation speed of the internal combustion engine is increased to cause the squirrel-cage induction machine to act as a power generator, and forcible charging is performed to store energy required for starting in the battery. Since the maximum output of the internal combustion engine can be reduced by such control, the internal combustion engine itself can be downsized. Further, such control can be realized only by providing a squirrel cage induction machine between the clutch and the transmission.

[0010]

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

In the embodiment of the present invention, an internal combustion engine 1, an engine control device 2 including a program control circuit 2a for controlling the rotation speed of the internal combustion engine 1, and a clutch 3 mounted on an output shaft of the internal combustion engine 1. , The transmission 4 mounted on the output shaft of the clutch 3 and the clutch 3 in association with the engine control device 2.
And a program control circuit 5a for automatically controlling the transmission 4.
And a program control circuit 7a for controlling a rotating magnetic field applied to the squirrel-cage induction machine 6 provided with a squirrel-cage induction device 6 for providing auxiliary power and auxiliary braking force to the internal combustion engine 1. As a feature of the present invention, a squirrel cage induction machine 6 is attached to a rotating shaft between the clutch 3 and the transmission 4, and the rotating magnetic field control apparatus 7, the engine control apparatus 2, and the transmission control apparatus are provided. 5 is a program control circuit 7 for interlocking the control with each other.
a, 2a and 5a, the program control circuit 7a of the rotating magnetic field control device 7 has means for setting a single start mode in accordance with a driving operation input, and in this single start mode, shift control is performed via the program control circuit 7a. Means for transmitting to the device 5 a signal for setting the clutch 3 in the disengaged state and setting the transmission 4 in the starting gear, and the squirrel cage induction machine 6 corresponding to the idling rotation speed of the internal combustion engine 1 from zero speed according to the operation input. And a means for transmitting a signal for setting the clutch 3 in the engaged state via the program control circuit 7a at the corresponding speed.

In the rotating magnetic field control device 7, the DC voltage of the secondary battery circuit 8 is used as a means for generating auxiliary power and auxiliary braking force in the cage induction machine 6 under the control of the program control circuit 7a. 6 is converted into an AC voltage having a frequency suitable for inducing a rotating magnetic field having a rotation speed lower than that of the shaft 6, and this is supplied to the squirrel cage induction machine 6, and the AC power from the squirrel cage induction machine 6 is converted to DC power. And an inverter control circuit 12 for generating a control signal for setting the frequency of the AC side voltage of the inverter circuit 11. The inverter control circuit 12 includes means for generating a control command by the driver according to the driving of the automobile.

A rotation sensor 9 is attached to the squirrel cage induction machine 6, and its detection output is sent to a program control circuit 7a and an inverter control circuit 12 of the rotating magnetic field control device 7.

Further, a capacitor 13 and a semiconductor switch circuit 14 are connected to the output side of the inverter circuit 11, and a resistor 15 is connected via the semiconductor switch circuit 14. The resistor 15 is provided to dissipate an excessive amount of electric energy that cannot be regenerated when the vehicle is heavily braked.

A detection circuit 16 for detecting the output voltage of the inverter circuit 11 is connected to the secondary battery circuit 8 and the semiconductor switch circuit 14, and a current detector 17 for detecting a change in current is provided in the resistor 15. A switch control circuit 18 for controlling the semiconductor switch circuit 14 according to the detection signal is connected to the current detector 17. The detection circuit 16 is connected to the switch control circuit 18.

Next, the operation of the embodiment of the present invention thus constructed will be described.

When the rotating magnetic field control device 7 receives the independent start signal, the program control circuit 7a sets the independent start mode and sends the setting signal to the shift control device 5. The shift control device 5 sets the clutch 3 in the disengaged state and sets the gear position of the transmission 4 in the start state in accordance with the setting signal. As a result, the transmission 4 is separated from the internal combustion engine 1 and directly connected to the cage induction machine 6.

At the same time, the program control circuit 7a of the rotating magnetic field control device 7 sends a signal set in the starting mode to the engine control device 2. Upon receiving this setting signal, the program control circuit 2a of the engine control device 2 prohibits the fuel injection pump 1a of the internal combustion engine 1 from injecting fuel.

The transmission 4 is separated from the internal combustion engine 1 and directly connected to the cage induction machine 6, and the fuel injection pump 1
When the fuel injection from a is prohibited, the rotating magnetic field control device 7
The program control circuit 7a sends a control signal to the inverter control circuit 12 to operate the inverter circuit 11.
The inverter circuit 11 converts the DC power from the secondary battery circuit 8 into AC power and supplies the AC power to the squirrel cage induction machine 6 to give a rotating magnetic field.

The squirrel cage induction machine 6 receives this rotating magnetic field, rotates as an electric motor, and transmits power to the transmission 4 which is already set to the starting gear. As shown in FIG. 2, when the rotation speed of the squirrel cage induction machine 6 is accelerated from zero to a speed corresponding to the idling rotation speed of the internal combustion engine 1, the program control circuit 7 a of the rotating magnetic field control device 7 outputs the rotation sensor 9 from the rotation sensor 9. In response to the detection output, the engine control device 2 and the shift control device 5
A fuel injection signal and a signal for bringing the clutch 3 into a contact state are sent to the. With this signal, the engine control device 2 releases the prohibition state of fuel injection from the fuel injection pump 1a, and at the same time, the shift control device 5 sets the clutch 3 in the engagement state.

As a result, the internal combustion engine 1 is started and its power is transmitted to the drive wheels.
Control of the rotational speed of the internal combustion engine 1 is performed, the gear change control device 5 automatically controls the clutch 3 and the transmission 4 in conjunction with the engine control device 2, and the rotating magnetic field control device 7 causes the internal combustion engine 1 to provide auxiliary power and auxiliary control. The rotating magnetic field applied to the squirrel cage induction machine 6 that supplies power is controlled.

As described above, the rotating magnetic field control device 7 for controlling the rotating magnetic field of the cage induction machine 6 provided between the clutch 3 and the transmission 4, the shift control device 5 for controlling the clutch 3 and the transmission 4, and By interlocking the engine control device 2 that controls the internal combustion engine 1, it is possible to set the clutch 3 to the disengaged state at the time of starting and disconnect the transmission 4 and the internal combustion engine 1 to start only with the cage induction machine 6. Becomes

Therefore, delicate clutch control at the time of starting is unnecessary, and therefore, the clutch 3 having a small and simple structure such as the dry clutch 3a shown in FIG. 3 can be used.

With such a structure, when the vehicle is stopped, charging of the secondary battery circuit 8 is not hindered, and when charging is required while the vehicle is stopped, the clutch 3 is put in the engaged state to change gears. If the machine 4 is controlled to be set to the neutral position, the charging operation of the secondary battery circuit 8 can be performed, and the consumption of electric power at the time of starting increases the rotation speed of the internal combustion engine 1 at the time of stopping the vehicle and forcibly charges it. You can make up for it.

[0025]

As described above, according to the present invention, by using electric power when starting the vehicle, it is possible to eliminate the noise and the black smoke generated at the time of starting the vehicle, and to deal with the environmental purification. Can be carried out smoothly, and the life of the clutch can be extended.

Furthermore, since the load at the time of starting, which requires the largest driving force, is not applied to the internal combustion engine, there is an effect that the internal combustion engine and the clutch can be downsized.

[Brief description of drawings]

FIG. 1 is a block diagram showing the configuration of an embodiment of the present invention.

FIG. 2 is a diagram showing a starting output range of the squirrel cage induction machine according to the embodiment of the present invention.

FIG. 3 is a diagram showing an example of mounting the squirrel cage induction machine according to the embodiment of the present invention.

[Explanation of symbols]

 1 Internal Combustion Engine 1a Fuel Injection Pump 2 Engine Control Device 2a, 5a, 7a Program Control Circuit 3 Clutch 3a Dry Clutch 4 Transmission 5 Transmission Control Device 6 Cage Induction Machine 7 Rotating Magnetic Field Control Device 8 Secondary Battery Circuit 9 Rotation Sensor 11 Inverter circuit 12 Inverter control circuit 13 Capacitor 14 Semiconductor switch circuit 15 Resistor 16 Detection circuit 17 Current detector 18 Switch control circuit

Claims (2)

[Claims] 1. An internal combustion engine, an engine control device including a program control circuit for controlling a rotation speed of the internal combustion engine, a clutch mounted on an output shaft of the internal combustion engine, and a clutch mounted on an output shaft of the clutch. A squirrel-cage induction machine that includes a transmission and a shift control device that includes a program control circuit that automatically controls the clutch and the transmission in cooperation with the engine control device, and that provides auxiliary power and auxiliary braking force to the internal combustion engine. In an automobile with an auxiliary power braking device provided with a rotating magnetic field control device including a program control circuit for controlling a rotating magnetic field applied to the squirrel-cage induction machine, the squirrel-cage induction machine is provided with the clutch and the transmission. Interlocking control means attached to the rotating shaft between the rotating magnetic field control device, the engine control device, and the shift control device for interlocking their control with each other. Car with auxiliary power braking device, which comprises. 2. The rotating magnetic field control device includes means for setting a single start mode in accordance with a driving operation input, and the rotating magnetic field control device, in the single start mode, controls the shift control via the interlocking control means. Means for transmitting to the device a signal for setting the clutch in the disengaged state to set the transmission to the starting gear, and corresponding to the idling rotation speed of the internal combustion engine from zero speed of the squirrel cage induction machine in accordance with a driving operation input. 2. The vehicle with an auxiliary power braking device according to claim 1, further comprising means for accelerating to a speed and means for transmitting a signal for setting the clutch in an engaged state via the interlocking control means at a speed corresponding thereto.