JPS61132424A - Automatic clutch control device - Google Patents

Abstract

PURPOSE:To make it possible to move a vehicle at a crawling speed without depression of an accelerator pedal, by providing a creep mode switch for holding such a condition that a clutch is engaged while slipping when this switch is turned on. CONSTITUTION:An automatic clutch control device detects the rotational speed of an engine 1 by means of a sensor 1A, and delivers the detection signal to a program control circuit 4 from which a control signal is delivered to an air-servo mechanism for driving an actuator 6, and therefore, a clutch in a clutch section 2 is engaged and disengaged. In the above-mentioned arrangement, there is provided a creep mode switch 10. When this switch 10 is turned on by the driver, the control circuit 4 controls the clutch so that the clutch is held to be engaged while slipping. Further, when an accelerator pedal 7A is depressed, an accelerator detecting switch 11 detects this condition, and therefore, the turned-on condition of the creep mode switch 10 may be released.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an automatic clutch device that uses a friction clutch to programmatically control contact pressure.

In particular, it relates to creep operation in which the vehicle is moved forward or backward at a slow speed.

[Conventional technology]

2. Description of the Related Art Various types of automatic clutch control devices are known that automatically disengage clutches of automobiles and change gear combinations by program control.

Among these, the clutch section and transmission gear section use conventional mechanical mechanisms that are manually operated, and automatic clutch control devices that program control the clutch and gear operations using a control circuit containing a microprocessor are already in common use. A mechanical device is controlled by an electronic circuit via a servo mechanism to automatically release and disengage the clutch.

This method has many advantages over other methods, such as being economical in fuel consumption as there is no clutch slip during high-speed operation, the reliability of the entire device, ease of maintenance, and ease of manufacture. be.

[Problem that the invention seeks to solve]

However, in the program-controlled automatic clutch mechanism described above, the clutch mechanism has a mechanical structure, so it cannot perform slow-speed operation by transmitting a small amount of engine torque, so-called creep operation, as is done with hydraulic coupling type automatic clutch devices. “The driver cannot easily do this. In other words, with conventional fluid coupling type clutches, it is possible to change the position by simply operating the brake when entering the garage, correcting the parking position, or starting on a slope, but with the friction clutch type, it is possible to change the position simply by operating the brake. , creep operation cannot be performed unless the brake and accelerator are pressed.This is because the program-controlled automatic clutch control device sets the contact pressure when the clutch engages to the pressure during normal operation. Therefore, when driving at very low speeds, the driver has to press the pedals repeatedly, and the vehicle will not start unless the accelerator pedal is pressed.Therefore, the driver has had to press the pedals frequently.

SUMMARY OF THE INVENTION An object of the present invention is to provide an automatic clutch device that can easily perform slow speed operation according to the driver's will.

[Failure to solve the problem]

As a means to solve the above problems, the first invention uses information on the rotational speed of the engine as input,
In an automatic clutch control device that includes a program control circuit that sends out output information to control the connection state of the clutch, and a means for mechanically controlling the clutch using the output information of this control circuit, the driver can operate the clutch. A creep mode switch connected to the control circuit is placed in a position where the clutch can slip and engage when the creep mode switch is in the ON state. The invention is characterized in that it includes a control means for controlling.

In addition to the configuration of the first invention, the second invention includes an accelerator detection means for detecting that the Arcel pedal is depressed, and when the control circuit &J and the creep mode 1' switch are in the on state, the accelerator The present invention is characterized in that it includes a control means for controlling the clutch to continue in a state of contact while slipping until there is a detection output from the detection means.

A third invention includes, in addition to the configuration of the first invention, a z-and-brake detection means for detecting that the handbrake has been operated, and the control circuit is configured to detect when the creep mode switch is in the on state. The present invention is characterized in that it includes a control means for controlling the clutch to continue from a slipping state to a mating state until there is a detection output from the handbrake detection means.

Furthermore, a fourth invention includes, in addition to the configuration of the first invention,
A creep amount adjustment operation end connected to a control circuit is provided at a position where the driver can operate the operation end, and when the creep mode switch is in an on state, the control circuit makes contact according to the operation amount of the creep amount adjustment operation end. The present invention is characterized in that it includes a control means for controlling the clutch to continue to be brought into contact while slipping due to pressure.

The second to fourth inventions can be used in any combination in one device.

[Effect]

In the device of the present invention, there is a creep motor switch in the driver's seat, and when the driver turns it on, the vehicle moves at a very slow speed without pressing the accelerator pedal.

Therefore, when the creep mode switch is on,
It is possible to move forward or backward at very low speed by simply operating the brakes.

In the second invention, when the accelerator pedal is depressed, the creep mode switch is automatically released and the vehicle returns to the normal operating state.

In the third invention, by operating the handbrake, the creep mode switch is automatically released and the normal operating state is returned.

The fourth aspect of the invention is to provide a creep mode switch as well as an operating end for adjusting the creep amount, and by adjusting the creep mode switch, the vehicle speed can be adjusted.

〔Example〕

Embodiments of the present invention will be described based on the drawings.

FIG. 1 shows a block configuration diagram of a control circuit according to a first embodiment of the present invention, and FIG. 2 shows a flowchart of the control state of the above embodiment.

In FIG. 1, an engine 1, a clutch section 2, and a transmission gear section 3 have known configurations. The rotational speed of the engine 1 is detected by the sensor IA, and using this as input information, the program control circuit 4 sends out output information that controls the connection state of the clutch inside the clutch unit 2, thereby controlling the actuator 6 via the air servo 5. The clutch is operated by the operation of the clutch. Further, reference numeral 7A indicates an accelerator pedal, reference numeral 8 indicates a speedometer, and reference numeral 9 indicates an input/output interface of the program control circuit 4. The air servo 5 is a solenoid valve that changes the delivery air pressure according to a change in the input voltage, and is a known device that can adjust the output of the clutch unit according to the output information of the program control circuit 4 and change the contact pressure of the clutch. be.

The features of the present invention in this embodiment include, first, a creep mode switch 10 is provided at a position that can be operated by the driver, and when the circuit of this creep mode switch 10 is turned on, program control is performed. Circuit 4 is
The purpose is to control the clutch so that it continues to meet from a slipping state.

Second, when the driver depresses the accelerator pedal 7A, when this is detected by the accelerator detection switch 1), the on-state of the leap motor switch 10 is controlled to be released. .

Thirdly, a creep amount adjusting operation end 12 for adjusting the creep amount is installed at a position that can be operated by the driver so that the vehicle can operate at a desired slow speed when the leap mode switch is in the on state. In this case, the contact pressure of the clutch is controlled to be finely adjusted.

The above operation control operation will be explained with reference to FIG.

When performing slow speed driving such as changing the driver's parking position, the creep mode switch 10 is turned on and the creep amount adjusting operation end 12 is placed at the appropriate adjustment amount position.

When the brake is released, a slight torque corresponding to the operation amount of the creep amount adjusting operation end 12 is applied, and the vehicle moves at a very slow speed. At this time, if the speed and torque of the slow movement are not desired, the creep amount adjustment operation terminal I2 is operated to obtain the desired slow movement speed. .

To return to normal operation after completing slow speed operation,
When the accelerator pedal is pressed, the accelerator detection switch is activated and the creep mode switch is automatically turned off.

The block configuration diagram of the control circuit of the second embodiment of the present invention is shown in the third embodiment.
As shown in the figure.

The second embodiment is characterized in that the switch circuit for canceling the creep mode is constituted by a Hunt' brake detection switch I3 that is interlocked when the handbrake 7B is operated. The other configurations are the same as those of the first embodiment described above, so detailed explanations will be omitted.

In this case, the vehicle is driven in creep mode, and the handbrake is pulled when the vehicle stops at a fixed position intended by the driver, so the creep mode is automatically released at this time.

FIG. 4 shows a block diagram of a control circuit according to a third embodiment of the present invention.

The feature of this third embodiment is that a circuit is provided that automatically controls the valve 14 of the bypass path set in the fuel supply system to the open state in conjunction with the ON state of the oc-creep mode switch 10. There is. The other configurations are the same as those in the first embodiment, so detailed explanations will be omitted.

In this example, when the driver turns on the creep mode switch 10, the valve 14 is automatically opened, so engine stomp can be prevented from occurring even if the engine idling is set low.

In the first embodiment described above, the creep mode state is automatically released when the vehicle is further accelerated, and in the second embodiment, the creep mode state is automatically released when the vehicle stops. In this case, the two embodiments may be combined and implemented.

In the above-mentioned first and second embodiments, the creep mode state is automatically released, but it can also be done manually by the driver turning off the creep mode switch, or by other means. It can also be done by a method.

In the above example, the creep amount adjusting operation end is shown as a potentiometer, but a non-contact actuating transformer or a multi-terminal changeover switch may also be used.

In the third embodiment described above, the opening state of the valve in the bypass passage is controlled in conjunction with the creep mode switch being turned on, but this is linked with the creep amount adjusting operation end to adjust the creep amount. It is also possible to configure the circuit so that the valve is opened when the adjustment value of the adjustment operation end exceeds a predetermined value.

In the third embodiment described above, the bypass passage of the fuel supply system was explained to be controlled, but if the valve is electrically operated,
It is also possible to configure the valve opening itself to be controlled. This can also be configured to be done by software.

[Effects of the Invention] According to the present invention, it is possible to add the creep operation performance peculiar to the fluid coupling type automatic clutch control device to the program control type automatic clutch control device which has excellent high-speed operation characteristics, so that the brake pedal Due to its characteristics, it is possible to move forward or backward at a very slow speed. Therefore, there is an effect that the maneuverability of the vehicle is improved.

[Brief explanation of drawings]

FIG. 1 is a block diagram of a control circuit according to a first embodiment of the present invention. FIG. 2 is a flowchart of the control operation of the above embodiment. FIG. 3 is a block diagram of a control circuit according to a second embodiment of the present invention. FIG. 4 is a block diagram of a control circuit according to a third embodiment of the present invention. DESCRIPTION OF SYMBOLS 1... Engine, IA... Sensor, 2... Clutch part, 3... Transmission gear part, 4... Program control circuit, 5... Air servo, 6... Actuator, 7
A...Accelerator pedal, 7B...Handbrake,
8... Speedometer, 9... Input/output interface, 10
... Creep mode 1' switch, 1) ... Accelerator detection switch, 12 ... Creep amount adjustment operation end, 13
...Handbrake detection switch, 14...Valve. Patent applicant: Hino Motors Co., Ltd.

Claims (4)

[Claims] (1) A program control circuit that receives information on the rotational speed of the engine and sends output information that controls the connection state of the clutch, and means that mechanically controls the clutch according to the output information of this control circuit. The automatic clutch control device is equipped with a creep mode switch connected to the control circuit at a position that can be operated by the driver, and when the creep mode switch is in the ON state, the clutch is slipped and the creep mode switch is connected to the control circuit. An automatic clutch control device characterized by comprising a control means for controlling to continue a clutching state. (2) Equipped with a program control circuit that receives engine rotational speed information as input and outputs output information for controlling the connection state of the clutch, and means for mechanically controlling the clutch in accordance with the output information of this control circuit. The automatic clutch control device includes a creep mode switch that is placed at a position where the driver can operate it and is connected to the control circuit, and an accelerator detection means that detects that the Arcel pedal is depressed, and the control circuit includes: An automatic clutch control device comprising: control means for controlling the clutch to continue to slip and engage when the creep mode switch is in the on state until a detection output from the accelerator detection means is received. (3) Equipped with a program control circuit that receives engine rotational speed information as input and outputs output information for controlling the connection state of the clutch, and means for mechanically controlling the clutch in accordance with the output information of this control circuit. The automatic clutch control device includes a creep mode switch that is placed at a position where the driver can operate it and is connected to the control circuit, and a handbrake detection means that detects that the handbrake has been operated, and the control circuit includes: , When the creep mode switch is in the on state, the operation continues until there is a detection output from the handbrake detection means.
An automatic clutch control device characterized by comprising a control means for controlling the clutch to continue in a state of contact while slipping. (4) Equipped with a program control circuit that receives engine rotational speed information as input and outputs output information for controlling the connection state of the clutch, and means for mechanically controlling the clutch in accordance with the output information of this control circuit. The automatic clutch control device includes a creep mode switch connected to the control circuit and a creep amount adjusting operation terminal connected to the control circuit at a position that can be operated by the driver, and the control circuit is configured to control the creep mode. An automatic clutch control device characterized by comprising a control means for controlling the clutch to continue in a state of contact while slipping with a contact pressure according to the operation amount of the creep amount adjustment operation end when the switch is in the on state.