JPH0134750Y2 - - Google Patents

Description

[Detailed description of the invention] (a) Technical field of the invention The present invention describes a clutch suitable for controlling the drive of a clutch inserted between a vehicle engine such as an automobile and a drive system after a transmission. This relates to a drive device.

(b) Background of the technology Clutches used in vehicles such as automobiles are
The engine power is cut off from the drive system after the transmission when the clutch pedal is depressed, and the engine power is connected to the drive system after the transmission when the clutch pedal is released. Therefore, by depressing the clutch pedal, engine power is cut off from the drive system after the transmission, making it easy to shift gears. By releasing the transmission, engine power corresponding to the gear shift position of the transmission is transmitted to the drive system after the transmission.

By the way, to start the engine, there are two ways to start the engine: one is to disengage the clutch and turn the ignition key, and the other is to set the transmission shift position to neutral and turn the ignition key. Since the clutch and transmission are connected to the drive system after the transmission, the clutch and transmission act as a load for the engine's starter motor. Therefore, if the engine is started while the clutch is connected to the drive system after the transmission, a large load will be placed on the starter motor. In particular, when starting the engine when the engine is cold, the load on the starter motor increases, and the engine may not start reliably.

Therefore, when starting the engine, the clutch pedal is depressed to actuate the clutch to disconnect it from the drive system after the transmission, thereby lightening the load on the starter motor and starting the engine. However, it is cumbersome to operate the clutch pedal by depressing the clutch pedal every time the engine is started, and there has been a need for something that can easily start the engine even when it is cold.

In addition, as related to this, Japanese Patent Application Laid-Open No. 1987-
There is a method shown in Publication No. 18819, but since the clutch is not reliably disconnected from the engine when the clutch pedal is not depressed, the load cannot be reduced. Furthermore, when the clutch pedal is depressed, a booster using an electric circuit is also activated, and the booster also cuts off the clutch, which can cause problems such as overflow of the clutch release cylinder and overstroke of the clutch. It was hot.

(c) Purpose of the invention This invention was made to solve the above problem, and its purpose is to securely shut off the clutch before starting the engine so that the engine can be started without depressing the clutch pedal even during cooling. To provide a clutch drive device which can be started quickly and does not cause overflow of a clutch release cylinder or overstroke of a clutch when a clutch pedal is depressed.

(d) Structure of the invention The structure of the present invention to achieve the above object includes a clutch cutoff circuit that cuts off the clutch from the drive system after the transmission when the clutch pedal is depressed, and a clutch cutoff circuit that cuts off the clutch from the drive system after the transmission when the clutch pedal is depressed. A clutch drive device is provided with a clutch connection circuit that connects the transmission to a drive system after the transmission, and a clutch cutoff drive control circuit is provided that closes the clutch cutoff circuit when the engine start operation of the ignition key switch is performed.
The clutch disconnection drive control circuit includes a neutral switch that opens when the gear shift position is in neutral, a clutch switch that opens when the clutch pedal is depressed, and a clutch release switch that closes when the clutch is disconnected. This device is characterized by being provided with a motor drive circuit.

(e) Embodiments of the invention A preferred embodiment of the invention will be described below based on FIGS. 1 and 2.

In FIG. 1, a clutch pedal 10 is connected to a clutch master cylinder 1 via a push rod 12.
4, and when the clutch pedal 10 is depressed, oil in the clutch master cylinder 14 is forced to the relay piston 20 via the pipe 16 and the clutch booster 18. relay piston 2
0, compressed air is supplied from the air reservoir 22, and when hydraulic pressure is applied to the relay piston 20 by depressing the clutch pedal 10, the relay valve 21 opens and compressed air from the air reservoir 22 is supplied to the cylinder chamber 24. be provided. When the power piston 26 responds to this compressed air, the push rod 28 moves and the release fork 30 moves.
rotates. As a result, the clutch disk inside the clutch cover 32 is connected to the engine flywheel 3.
3, and the engine power is cut off.

On the other hand, when the clutch pedal 10 is released, the relay valve 21 is operated to close the compressed air passage, and at the same time the cylinder chamber 2
The compressed air in the clutch booster 18 escapes from the breather of the clutch booster 18. At this time, the elastic force of the pressure spring of the clutch cover 32 pushes the pressure plate, and the clutch disk is connected to the flywheel 33 of the engine.

In this way, the clutch drive device can disengage or engage the clutch in response to actuation of the clutch pedal 10.

The clutch drive device that constitutes the clutch disconnection circuit and the clutch connection circuit is provided with a clutch disconnection drive control circuit 42 that closes the clutch disconnection circuit when the ignition key switch 40 is turned on.

The clutch cutoff drive control circuit 42 is the electromagnetic valve 4
The inlet side of the valve 44 is connected to the air reservoir 22 via a pipe 46 and a three-way valve 48, and the outlet side is connected to a pipe 54 via a pipe 50 and a double check valve 52. or,
The electric circuit that controls the opening of the electromagnetic valve 44 includes a clutch switch 56 that opens when the clutch pedal 10 is depressed, and a neutral switch 58 that closes when the gear shift position of the transmission is in neutral. has been inserted. The solenoid valve 44 opens only when the clutch switch 56 and the neutral switch 58 are both closed, and compressed air supplied from the air reservoir 22 is passed through the pipe 50, the double check valve 52, and the pipe 54 to the cylinder chamber. 24.

In addition, a clutch release switch 62 that opens when the clutch is disconnected is inserted into the starter motor drive circuit that drives the starter motor 60, and the starter motor 60 is activated when the clutch release switch 62 is closed. When the ignition key switch 40 is turned on, the relay 64 is energized, thereby driving the engine.

In the above configuration, when the transmission gear shift position is in neutral and the ignition key switch 40 is turned on while the clutch pedal 10 is not depressed, the loop of the clutch cutoff drive control circuit is closed. In order to
The solenoid valve 44 opens and the compressed air in the air reservoir 22 flows through the pipe 50, double check valve 52,
It is fed into the cylinder chamber 24 through a pipe 54, and when the push rod 28 is actuated, the release fork 30 is rotated, and the clutch disc in the clutch cover 32 is connected to the flywheel 3 of the engine.
3, and the engine power is cut off. At this time, since the drive loop of the starter motor 60 is also closed at the same time, the starter motor 60 is started.
That is, in this embodiment, when the ignition key switch 40 is turned on, the clutch is cut off from the drive system after the transmission in conjunction with the on operation of the ignition key switch 40, so that the starter motor 60 The load on the
The engine can be easily started by operating the starter motor 60.

Further, when the clutch pedal 10 is depressed, the clutch switch 56 is opened and the clutch disconnection drive control circuit 42 is disconnected, so that the clutch disconnection drive is performed by the clutch disconnection circuit as described above. Further, in this embodiment, since a neutral switch 58 is inserted into the clutch cutoff drive control circuit 42, the ignition key switch 40 is turned on when the transmission gear is in a position other than neutral. Even if the clutch disconnection drive control circuit 42 is not closed,
It is possible to prevent the vehicle from running when the engine is started. Note that after the clutch is completely disconnected, the clutch release switch 62 is closed, so that the drive loop of the starter motor 60 is connected.

As described above, in this embodiment, the engine can be reliably started only by operating the ignition key switch 40 without depressing the clutch pedal 10, and the starting performance can be improved.

FIG. 2 shows the structure of another embodiment of the present invention.

In this embodiment, the outlet side of the electromagnetic valve 44 is connected to the actuator 72 via a pipe 70, and the hydraulic system of the actuator is connected to the pipe 16 via the pipe 74 and the double check valve 76.
Since the other configurations are the same as those in the previous embodiment, the same components are given the same reference numerals and their explanation will be omitted.

The actuator 72 has an air chamber 80 and an oil chamber 82 with the valve 78 as a boundary, and when the electromagnetic valve 44 opens, the compressed air in the air reservoir 22 flows into the air chamber 80.
When the clutch master cylinder 14 pumps the clutch master cylinder 14 when the clutch pedal 10 is depressed, the same amount of oil is discharged from the discharge port 84 of the actuator 72. That is, in this embodiment, when the ignition key switch 40 is turned on while the clutch switch 56 and the neutral switch 58 are both closed, the solenoid valve 44 opens and the compressed air in the air reservoir 22 is released. is fed into the air chamber 80 of the actuator 72. Then, the oil for operating the relay piston 20 is discharged from the discharge port 84 of the actuator 72 by the operation of the valve 78, the release fork 30 is rotated by the operation of the push rod 28, and the clutch disc in the clutch cover 32 is rotated. It separates from the flywheel 33 of the engine, and the power of the engine is cut off.

In this way, in this embodiment, as in the previous embodiment, even if the clutch pedal 10 is not pressed down when the clutch is cold, the clutch can be removed from the drive system after the transmission by simply turning on the ignition key switch 40. It can be shut off and the engine can be started easily even when it is cold.

(f) Effect of the invention As explained above, according to the invention, a clutch disconnection drive control circuit is provided which closes the clutch disconnection circuit by the engine start operation of the ignition key switch, and a clutch disconnection drive control circuit is provided in the clutch disconnection drive control circuit. , a starter motor drive circuit is provided which has a neutral switch that closes when the gear shift position is in neutral, a clutch switch that opens when the clutch pedal is depressed, and a clutch release switch that opens when the clutch is disconnected. By firmly shutting off the engine before starting the engine, the engine can be started without depressing the clutch pedal even when the engine is cooled.Also, when the clutch pedal is pressed, the clutch cutoff drive control circuit is opened. Since the clutch booster is driven only by hydraulic pressure from the clutch master cylinder, there is no possibility of overflow of the clutch release cylinder or overstroke of the clutch. Furthermore, when the clutch pedal is depressed, unnecessary additional resistance is not applied to the clutch booster, so that effects such as smooth driving are exhibited.

[Brief explanation of the drawing]

Fig. 1 is a configuration diagram showing one embodiment of the present invention;
The figure is a configuration diagram showing another embodiment of the present invention. In the drawing, 10 is a clutch pedal, 14 is a clutch master cylinder, 18 is a clutch booster, 20 is a relay piston, 40 is an ignition key switch, 42 is a clutch cutoff drive control circuit, 44 is a solenoid valve, 56 is a clutch switch, 58 is a neutral switch, 62 is a clutch release switch, and 72 is an actuator.

Claims (1)

[Scope of utility model registration request] A clutch equipped with a clutch disconnection circuit that disconnects the clutch from the drive system after the transmission when the clutch pedal is depressed, and a clutch connection circuit that connects the clutch to the drive system after the transmission when the clutch pedal is depressed and released. The drive device is provided with a clutch disconnection drive control circuit that closes the clutch disconnection circuit when the engine starts from the ignition key switch, and the clutch disconnection drive control circuit includes a clutch disconnection drive control circuit that closes the clutch disconnection circuit when the gear shift position is in neutral. 1. A clutch drive device comprising a starter motor drive circuit having a neutral switch that opens when the clutch pedal is depressed, a clutch switch that opens when the clutch pedal is depressed, and a clutch release switch that opens when the clutch is disconnected.