JPS63106430A - Clutch control device - Google Patents

Abstract

PURPOSE:To dissolve dispersion in responsibility by storing the overshoot quantity of a clutch position after stopping the driving operation of a clutch actuator by means of an electromagnetic valve as learning value. CONSTITUTION:The switching control of electromagnetic valves V1, V2 causes a clutch 2 to function, and then the moving quantity of the piston 32 of a clutch actuator 3 is detected to be inputted into an electronic controller 5. The overshoot quantity of a clutch position after stopping the driving operation of the clutch actuator 3 is stored as learning value. Thus, even after the electromagnetic valves stop the driving operation of the clutch actuator, overshooting actuion moves the clutch position for gaining a proper clutch target position.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a clutch control device that controls the operation of a clutch that connects and disconnects the transmission of engine power.

(Prior technology) In recent years, signals from sensors installed in various parts of the vehicle are input,
A clutch control device has been developed that controls a clutch actuator of a vehicle by operating fluid pressure using an electronic control device that issues commands in response to these signals.

Some clutch control devices of this type control the moving speed of the clutch by the stroke of the clutch actuator at the start and end points of a half-clutch during clutch operation, but there are variations in each clutch mechanism and the aging of the clutch. There were problems such as an inability to respond to changes.

For this reason, a patent has been proposed for an automatic clutch start control method that determines an appropriate clutch stroke according to the engine rotational speed and controls the actuator operation speed according to changes in the amount of actuator movement relative to this stroke amount. It is disclosed in Publication No. 58-225229.

(Problems to be solved by the invention) In the above-mentioned proposal of the automatic clutch start control method,
Although it is possible to achieve a half-clutch operation commensurate with the engine rotation depending on the load condition of the vehicle, a problem arises in that overshoot of the clutch operation is not controlled when the clutch is engaged or disengaged.

For this reason, a problem arises in which the clutch feeling differs from one clutch to another due to product variations based on the clutch actuator, clutch stroke sensor, etc., and variations in responsiveness due to changes in the clutch mechanism over time. In addition,
If the above-mentioned overshoot phenomenon is not properly controlled, there is a risk of surface hardening and premature wear of the clutch facing.

The present invention has been made in view of the above-mentioned problems, and its purpose is to perform anticipatory control of the overshoot amount of clutch operation when the clutch is disengaged, and to improve responsiveness due to variations between products and changes over time. To provide a clutch control device that attempts to eliminate variations in the

(Means for Solving the Problems) According to the present invention, in a clutch control device that controls the opening and closing of a solenoid valve to drive a clutch actuator using fluid pressure to perform clutch cross-cross control, the clutch actuator is controlled by the solenoid valve. A clutch control device is provided, which includes a storage means for learning and storing the amount of movement of the clutch position after a drive stop signal is generated, and a control means for controlling a solenoid valve in anticipation of the amount of movement stored in the storage means when operating the clutch. be done.

(Function) In the present invention, the movement of the clutch position after the generation of the drive operation stop signal of the clutch actuator by the solenoid valve is learned and stored as an overshoot amount. By stopping the electromagnetic valve operation before the amount of overshoot, the clutch position moves even after the electromagnetic valve operation is stopped, and an appropriate latch target position can be obtained.

(Example) Next, an example of the present invention will be described in detail using the drawings.

FIG. 1 is a block diagram showing an embodiment of the clutch control device of the present invention.

In FIG. 1, 1 is an engine flywheel, 2 is a clutch, and 3 is a clutch actuator that operates the clutch 2. Its piston rod 31 engages with the release lever 21 of the clutch 2, and the movement of the piston 32 causes the clutch actuator to actuate the clutch 2. Perform connection/disconnection in step 2.

The clutch actuator 3 has an oil chamber 33 and an oil chamber 34, and is connected to the hydraulic pump 4, which is a high-pressure oil pressure source, and a tank 41, which is a low-pressure side, through a pipe 42. Solenoid valves Vl and v2, which are operated by commands from an electronic control unit, are provided as shown.

And solenoid valve V! When (2) is opened and (2) is controlled to close, the clutch 2 is disengaged, and the solenoid valve v1 is closed. When (2) is controlled to be opened, the clutch 2 is engaged due to the elastic force of the spring 36, and both solenoid valves vl and v2 are closed. The clutch 2 is configured to be held when controlled.

A stroke sensor 35 detects the amount of movement of the piston 32 of the clutch actuator 3 using, for example, a potentiometer mechanism, and sends a detected signal to the electronic control device 5.

Reference numeral 6 denotes a transmission, which uses, for example, a parallel shaft gear system to change the speed of the engine power transmitted from the clutch 2, and transmits it to the axle via a transmission mechanism (not shown) to drive the wheels.

The electronic control unit 5 is composed of a microcomputer, and includes a central processing unit that performs arithmetic processing based on read signals, various storage devices that memorize the calculation results and read signals, and reads signals from various sensors and performs various types of processing. It consists of input/output devices that transmit commands to actuators, solenoid valves, etc.

Then, the stroke sensor 35 and the "tm valve V l
In addition to the input and output shafts of the transmission 6, the electronic control device 5 is connected to a rotation sensor provided on the input shaft and the output shaft of the transmission 6, a gear shift mechanism and a select mechanism of the transmission 6, and the like.

FIG. 2 is a process flow diagram showing an example of the operation of this embodiment, and FIG. 3 is an explanatory diagram showing the relationship between various setting values used for the process flow factors in FIG. 2.

First, the process of changing the gear position of the transmission to neutral and changing the clutch from a disengaged state to an engaged state will be described with reference to FIG.

In step 1, based on the signal from the stroke sensor 35 of the clutch actuator 3, it is determined whether the clutch position is a new example from a predetermined set value between a half-clutch position and a fully disengaged position, and the clutch position is determined as a new example. If not, open the solenoid valve vl, close V2, and change the clutch position to the new example from the setting value (step 2).If the new example is found in step l, close the solenoid valve v1, and open 2. to drive the piston 32 to engage the clutch in step 3, and move the clutch position to the set value H near the half-clutch position (
Step 4) Then, this clutch position is stored as Ml in the electronic control device 5 according to the signal from the stroke sensor 35, and the solenoid valve v1+''2 is closed to perform a clutch holding operation (steps 5 and 6).

Here, the clutch position moves in the tangential direction due to overshoot, but the amount of change in the clutch position is equal to the predetermined set value A.
When the clutch position is below, this clutch position is memorized as M2 (steps 7 and 8), and in step 9, the value of M2 is subtracted from the above Ml to obtain MA, and this value of MA is used as the overshoot when the clutch is engaged. Let the learning value be .

Next, regarding the process of disconnecting the clutch from the engaged state,
In step IO, it is determined whether the clutch position is to the side of a predetermined set value ■ between the half-clutch position and the fully engaged position,
If the clutch position is not on the lateral side, in step 11, the solenoid valve ■l is closed and v2 is opened to set the clutch position on the lateral side from the set value ■.

If it is on the side in step 10, in step 12 the solenoid valve v
1 is opened and 2 is closed, the piston 32 is driven to disengage the clutch, and in step 13 it is determined whether the clutch position is a new example from a predetermined set value 2 near the half-clutch position. Here, if the clutch position is newer than the set value (2), the clutch position is stored as M3, and both electromagnetic valves vl and v2 are closed to perform a clutch holding operation (step 14.15).

Here, the clutch position moves in the disengaged direction due to the overshoot phenomenon, but in step 16, it is determined whether the amount of change in the clutch position is less than a predetermined set value B, and the clutch position is determined to be less than this set value B. The clutch position at the time is stored as MA in the electronic control device 5 (step 17).

Then, calculate MA-M3 stored in step 18,
Find the value of MB and use it as the learning value for overshoot when the clutch is disengaged.

In FIG. 2, the signal value of the stroke sensor 35 corresponding to the clutch position is set to be large on the completely disengaged side and small on the completely engaged side.

Next, FIG. 4 is a processing flow diagram showing the processing of the clutch engagement/disengagement control section using the overshoot learning value,
FIG. 5 is an explanatory diagram thereof.

4 and 5, first, the target position n of the clutch to be operated is determined as MC in step 21, and in step 22, when the current clutch position is newer than MC+MA, the clutch engagement operation, that is, the solenoid valve V1 is close, open v2 (step 23), and the current clutch position is MC-MB.
When it is on the side of the
■2 Closing) (steps 24 and 25), and by stopping the solenoid valve operation just before the learned value MA or MB from the clutch target position MC, the target position will be reached with overshoot. .

Although the present invention has been described by way of one embodiment, various modifications can be made within the scope of the gist of the present invention, and these are not excluded from the scope of the present invention.

(Effects of the Invention) According to the present invention, since the overshoot amount of the clutch position after the drive operation of the clutch actuator by the solenoid valve is stopped is stored as a learned value, the clutch target position is Although the driving operation by the electromagnetic valve is stopped before the overshoot, the clutch position moves due to the overshoot even after the stop, so that an appropriate latch target position can be obtained. For this reason,
It is possible to deal with variations in clutch mechanisms and variations in responsiveness due to changes over time, and to obtain an appropriate latch position.

In addition, the problem of individual clutch feeling is eliminated, and since a proper latch position can be obtained, the possibility of surface hardening and early wear of the clutch facing can be eliminated.

[Brief explanation of the drawing]

1st TI! J is a configuration block diagram showing one embodiment of the clutch control device of the present invention, FIG. 2 is a processing flow diagram showing an example of the operation of this embodiment, and FIG. 3 is a diagram of various setting values used in the processing flow diagram. FIG. 4 is a process flow diagram showing clutch control processing using the overshoot learning value, and FIG. 5 is an explanatory diagram of the process flow diagram. 2...Clutch, 3...Clutch actuator. 4...Hydraulic pump, 5...Electronic control device, 6...
Transmission, 32... Piston, 35... Stroke sensor, Vl, V2... Solenoid valve.

Claims (1)

[Claims] In a clutch control device that controls opening and closing of a solenoid valve to drive a clutch actuator using fluid pressure to control clutch engagement and disconnection, the amount of movement of the clutch position after the solenoid valve generates a drive stop signal for the clutch actuator is learned and stored. A clutch control device comprising a storage means and a control means for controlling a solenoid valve in anticipation of the amount of movement stored in the storage means when the clutch is operated.