JPH0475406B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION *Field of Industrial Application The present invention relates to an automatic clutch control device for a motor vehicle.

*Problems with conventional technology When changing gears in a car equipped with a transmission, the clutch is first disengaged, then the gear is changed, and then the clutch is engaged. An automatic clutch control device that automatically performs such a clutch operation has a memory in the electronic control device that stores clutch operating speed data (clutch data) at each gear stage. The clutch operating speed data required at the time is read out, and clutch control is automatically performed using this data. The operating speed of the clutch is as follows at each gear stage:
It has a soft operating speed that reduces the load on the engine and provides smooth operation that is comfortable to ride (this is called a soft operation mode).

However, some people who have experience operating the clutch by foot feel that such smooth clutch operation is sluggish; however, with automatic clutch control, the clutch operation speed can be adjusted to suit the driver's personality. It cannot be changed. In order to meet these needs, the clutch operation speed is increased (this is called a hard operation mode), but this leaves ordinary drivers dissatisfied.

*Object of the Invention The object of the present invention is to improve the above-mentioned drawbacks and provide an automatic clutch control system that is satisfactory to both ordinary drivers and drivers who prefer rough driving.

*Summary of the Invention The present invention provides an electronic control device included in an automatic clutch control device that stores clutch operating speed data (clutch data) for each gear in each operating mode, a hard operating mode and a soft operating mode.
A memory is provided to store the information, and a switch for hard operation and soft operation is installed at an appropriate location on the driver's seat.By switching this switch, the clutch is automatically operated in an operation mode according to the driver's preference. It allows the user to operate the system.

*Example Next, an example of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a block diagram showing an embodiment of the present invention, in which numeral 1 represents a flywheel attached to a rotating shaft of an engine (not shown), and numeral 2 represents a clutch. Clutch 2 is operated by the force of a diaphragm spring installed inside.
The clutch operating lever 21 is pressed so as to rotate clockwise by pressing the release bearing 22 rightward. 3 is a clutch actuator, in which a piston 33 is movably inserted into a cylinder 32, and a piston rod 31 connected to the piston 33 is connected to the operating lever 21.
is combined with 4 is a pump, 5 is an accumulator, 6 is an oil tank, 7 is an electromagnetic supply valve, and 8 is an electromagnetic discharge valve. Reference numeral 9 denotes an electronic control device consisting of a microcomputer, the details of which will be described later. 1
0 is a rotation sensor that detects the engine rotation speed by counting the number of teeth carved on the outer periphery of the flywheel 1, and 11 is a position sensor that detects the piston position of the actuator 3, which is composed of a potentiometer. 12 is a transmission, 12' is a vehicle speed sensor, 1
Reference numeral 3 denotes a select lever through which the driver issues a gear change command, and has neutral N, drive D, first gear, second gear, rear R, and parking P as switching positions. Then, a command signal COM corresponding to each switching position is output. 14 is the accelerator pedal, 1
5 is a potentiometer that detects the position of the accelerator pedal 14. 16 is a changeover switch for changing the operation mode of the clutch. Reference numeral 17 denotes a transmission actuator, which switches the gear of the transmission 12 to a desired position based on the drive control signal POSC issued from the electronic control device 9 based on the command signal COM issued from the select lever 13, and also switches the gear of the transmission 12 to a desired position. The device 9 outputs a position signal POS indicating the gear switching position to the transmission 12. Note that, like the clutch actuator 3, the transmission actuator 17 is operated by hydraulic pressure, but the hydraulic system is omitted because it would complicate the drawing. Although not shown in the figure, the electronic control unit 9 includes a central processing unit that performs arithmetic processing, an input/output port that exchanges data with the outside, and a random access port that temporarily stores data, calculation results, etc.・A read-only memory (ROM) is provided in which access memory (RAM), control programs, etc. are stored, and operation speed data (clutch data) of the piston 33 of the clutch actuator 3 is stored. clutch data
ROM is provided. FIG. 2 is a characteristic diagram showing the contents of the operating speed data (clutch data) stored in the clutch data ROM. Second
In the figure, the horizontal axis indicates the amount of depression of the accelerator pedal in percentage, and the vertical axis indicates the closing time of the electromagnetic exhaust valve 8, which opens and closes in a pulsed manner during operation. The solid line indicates the soft operation mode characteristics, and the dotted line indicates the hard operation mode characteristics. clutch data
The ROM stores data broadly divided into soft operation mode and hard operation mode, and software operation mode data is stored for each gear stage of the transmission, for example, 1st speed data. There is. The same applies to the hardware operation mode data.

Next, the operation of the embodiment according to the present invention will be explained.

In the state shown in FIG. 1, after the electromagnetic discharge valve 8 is closed and the electromagnetic supply valve 7 is opened by a command from the electronic control device 9, oil is supplied from the pump 4 to the right side of the cylinder 32, and the piston 33 is After moving to the left and rotating the clutch operating lever 21 counterclockwise to disengage the clutch, the electromagnetic supply valve 7 is closed to maintain the disengaged state.

FIG. 3 is a flow diagram illustrating the flow of operations. Note that before the operation shown in this flowchart,
After the clutch 2 is disengaged, the transmission actuator 17 operates to shift the gear of the transmission 12 to the gear position determined by the electronic control unit 9 from the engine speed, vehicle speed, and amount of depression of the accelerator pedal. Assume that it has been switched.

In FIG. 3, at first, the electronic control unit 9 looks at the signal issued from the changeover switch 16 and shifts to the flow state if it is in the hard operation mode. Fluoro determines whether the clutch action is from connection to disconnection or from disconnection to connection. In the case of FIG. 1, the clutch 2 is disconnected, so the flow moves on. In the flowchart, the gear position signal POS issued from the transmission actuator 17 is read. For example, if the signal is "1st speed",
In the Flowni, the clutch data for "1st gear" in the hardware operation mode is read from the clutch data ROM, and the data is sent to the electronic control unit 9.
Moved to RAM. Then, the accelerator pedal 14 detected by the potentiometer 15 at the flow
Solenoid discharge valve 8 at a duty corresponding to the amount of depression.
repeats opening and closing in a pulsed manner, and the piston 33 moves rightward at a predetermined speed by the force of the diaphragm spring of the clutch 2. Therefore, the oil in the cylinder 32 is returned to the oil tank 6 through the electromagnetic discharge valve 8. Piston 33 inside cylinder 32
When the clutch 2 completely moves to the right end, the movement of the clutch 2 from disengagement to engagement ends.

Returning to the fluoro flow, if the clutch operation changes from connection to disconnection in this flow, the process moves to the flow. It is assumed that the clutch 2 is in the engaged state before the operation shown in this flow.

In the flow, "clutch disengagement" data is read from the clutch data ROM, and the data is transferred to the RAM of the electronic control unit 9. In the float, the electromagnetic supply valve 7 repeatedly opens and closes in a pulsed manner at a duty based on the "clutch disengagement" data, and oil is sent to the right side of the piston 33, so the piston 33 moves leftward to a predetermined position. move at speed. And the clutch operation lever 21
presses the release bearing and disengages the clutch 2. When the piston 33 in the cylinder 32 has completely moved to the left end, the operation of the clutch 2 from engagement to disengagement ends. It should be noted that the operating speed of this clutch disengagement operation is considerably faster than that from the clutch disengagement to the clutch disengagement.

Returning to the flow state, the electronic control unit 9 looks at the signal issued from the changeover switch 16 at this flow state, and if it is in the software operation mode, shifts to the flow state. If the clutch connection is disconnected in the flow, the process moves to the above-mentioned flow. In addition, if the clutch is to be disengaged and the clutch is to be disengaged, the transition will be to flow, null, and loop. This flow is almost the same as the above-mentioned flows H, D, and E, but differs from FLOWN in that the clutch data in the soft operation mode is read from the clutch data ROM in FLOWN.

In the above embodiment, the same clutch data is used for upshifting and downshifting of the transmission, but the clutch data is increased to provide different clutch data for upshifting and downshifting. Clutch data different from that used during downtime may be used.

Further, the changeover switch can be provided, for example, in the handle portion of the select lever 13, but is not limited to this position, and may be located in any position as long as it can be easily operated by the driver. .

*Effects of the invention As explained in detail above, according to the present invention,
Two types of clutch data are prepared to operate the clutch: one that performs normal smooth operation, and one that performs rough operation at a slightly faster operating speed than normal.The clutch data can be selected as appropriate using a changeover switch. This makes it possible to provide an automatic clutch control system that is satisfactory to both ordinary drivers and those who prefer rough driving.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing one embodiment of the present invention, FIG. 2 is a characteristic diagram showing clutch data, and FIG. 3 is a flow chart showing the flow of clutch operation. 1... Flywheel, 2... Clutch, 3...
...Clutch actuator, 4...Pump, 6...
Oil tank, 7... Solenoid supply valve, 8... Solenoid discharge valve, 9... Electronic control device, 12... Transmission, 13
...Select lever, 16...Switch switch,
17...Transmission actuator.

Claims (1)

[Claims] 1 In an automatic clutch control device that controls clutch operation based on clutch speed data corresponding to the amount of depression of the accelerator pedal, the clutch operation speed corresponding to the amount of depression of the accelerator pedal is controlled from the clutch disengaged position to the clutch engaged position. A plurality of types of data maps are provided for each gear by changing the clutch operation speed corresponding to the amount of depression of the accelerator pedal, and a switch is provided to freely select the desired data map. 1. A control device for an automatic clutch, characterized in that the operation of the clutch is controlled by means of a control means that controls the clutch operation speed using data from a data map.