JPS62258228A - Clutch actuator control device - Google Patents

Abstract

PURPOSE:To enable a clutch to be engaged completely and aim at avoiding the abrasion of a release lever and a release bearing by providing a large flow valve for bypassing the oil pressure in a cylinder pressure intensifying chamber at a state where the clutch is engaged. CONSTITUTION:The clutch stroke position, the shift stroke position, the rotational frequency of engine and the rotational frequency of top gear are read in, and it is judged whether a shift stroke is neutral, or in the shift completed state, and then, in either case, it is judged whether the rotational frequency of engine is roughly equal to the rotational frequency of top gear. Subsequently, when it is roughly equal, it is judged whether a clutch stroke is in the engagement completed state or not, and then, if it is not in the engagement completed state, large flow valves V4,V5 are set to ON, and such ON state is maintained until it reaches the engagement completed state. While, in either of the cases where a shift stroke is not neutral, nor in the shift completed state, where the rotational frequency of engine is not roughly equal to the rotational frequency of top gear, and where the clutch becomes completely engaged, the valves V4, V5 are set to OFF. And accordingly, the clutch can be engaged completely, and the abrasion thereof can also be prevented.

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention is directed to a clutch actuator control device that uses hydraulic pressure to press the 4-Zerohokopu 1-9 steel. The present invention relates to a clutch actuator control device that reduces flow path resistance by bypassing hydraulic pressure in a cylinder chamber to which oil is supplied by operating a large flow valve so as to release it into a tank.

(Prior Art) In the prior art, the hydraulic circuit system shown in FIG. 1 was not provided with large flow valves v4 r v 5.

Therefore, in controlling clutch engagement, the large flow valve V is turned off from on, thereby cutting off the hydraulic pressure from the hydraulic pressure source P to the pressurizing chamber 1b of the craft actuator 1, and in this state, the return spring 6, the piston rod 1a of the clutch actuator is returned to the contact side.

(Problems to be Solved by the Invention) However, in this prior art, when the clutch is engaged, the release lever 3 and the release bearing 4 are in contact with each other, so even when the vehicle is running, the release lever 3 and release bearing 4 are in contact with each other. Since the release lever and release bearing are constantly in contact with each other, they wear out. In particular, even if the piston rod is moved further to the contact side by the spring force of the return spring to achieve a fully connected state, as is clear from Fig. 1, the throttle valve 7 is installed upstream of the small flow valve 2. Because of this, the flow path resistance was large and the piston rod of the clutch actuator could not be moved to the complete contact point.

Therefore, an object of the present invention is to provide a clutch actuator control device that can completely connect the clutch actuator by providing a large flow valve that bypasses the hydraulic pressure in the cylinder chamber that presses the oil pressure toward the image side to a tank.

(Means for Solving the Problems) In order to achieve the above-mentioned object, according to the present invention, the cylinder is pressed toward the contact side by a return spring, and is pressed toward the image side by supplying hydraulic pressure to the pressurizing chamber of the cylinder. For a clutch actuator with a piston rod,
A clutch actuator control device is provided that is provided with a large flow valve that bypasses the hydraulic pressure in the chamber and releases it into a tank when the clutch is engaged.

(Operation) The piston rod is moved to the image side by supplying hydraulic pressure to the pressurizing chamber of the cylinder of the clutch actuator. When the large flow valve that supplies hydraulic pressure is turned off and the large flow valve that releases hydraulic pressure in the cylinder chamber to the tank is turned on, the hydraulic pressure in the cylinder chamber is released to the tank, and the spring force of the return spring releases the clutch. The piston rod of the actuator moves to the fully connected side.

(Example) Next, the present invention will be described with reference to one drawing. FIG. 1 is a block diagram of a clutch actuator control device of the present invention;
FIG. 2 is a flowchart of the control.

In FIG. 1, l is a clutch actuator, 1a is its piston rod, and 1b is a cylinder chamber that becomes a pressurizing chamber. When hydraulic pressure is supplied to this chamber, the piston rod 1 of the clutch actuator 1 is moved to the right. In other words, move it toward the image side.

2 is a clutch stroke sensor that detects the position of the piston rod. 3 is a release lever, 14 is a release bearing, 5 is a release fork, and 6 is a return spring. 7 is a throttle valve, and 8 is a small flow valve v2. which will be described in detail later. This is a check valve that can be replaced with v3.

Vl is a large flow valve, v2. v, small flow valve, V
4, v5 are large flow valves provided according to the invention, and Veo, Vel are emergency valves.

Next, the relationship between each valve of the present invention and the connection/disconnection of the clutch actuator is shown in Table 1.

As is clear from Table 1, the fastest disconnection occurs when Vt, v3 is on, and ■5 is on, and the fastest termination occurs when ■3 is on. Further, the control disconnection, that is, the disconnection at a certain predetermined speed is performed by the on/off duty cycle of v1 on and {circle over (3)} on. The speed at which control is interrupted is determined by the duty cycle factor.

Also, the fastest connection is made in the state of ■4 on, ■5 on,
Stopping is performed by turning on ■3, and the M control contact is turned on by turning on v3.
This is done by the on/off duty cycle of the The speed of the control contact is determined by the duty cycle factor.

Furthermore, an emergency hydraulic circuit system is provided as a backup in case these normal hydraulic circuits fail, and disconnection is performed with Vel on and ■eo on, and connection is performed with Ve1 on. It will be done.

In addition, when the control is not controlled or the control is not connected, the small flow valve v2. (2) A check valve 8 can also be used in place of 5. ”Next, with reference to FIG. 2, control of the clutch actuator of the present invention will be explained.

First, the clutch stroke position, shift stroke position, engine rotation speed, and top gear rotation speed are each read (St, S2.S3.S4).

Next, it is determined whether the shift stroke is neutral or the shift is complete (S5), and in either case, it is determined whether the engine rotation speed is approximately equal to the top gear rotation speed (S6).

When the two strokes are approximately equal, it is determined whether or not the clutch stroke is completely connected. If not, large flow valves v4 and v5 are activated.
is turned on (S8), and the on state is maintained until complete connection is achieved.

In any one of the following cases: if the shift stroke is neutral or not completed in step S5, if the engine speed is not approximately equal to the top gear speed in step S6, or if the clutch is fully engaged in step S7 , high flow valves V48 and V5 are turned off.

(Effects of the Invention) As explained in detail above, the present invention is provided with a large flow valve that bypasses the hydraulic pressure in the cylinder chamber to the tank, so the clutch can be completely engaged and wear on the release lever and release bearing can be prevented. can.

[Brief explanation of drawings]

FIG. 1 is a block diagram of a clutch actuator control device according to the present invention, and FIG. 2 is a flowchart of its control. 1... Clutch actuator, 2... Clutch stroke sensor, 3... Release lever 14... Release bearing, 5... Release fork, 6...
・Return spring, 7... Throttle valve, 8... Check valve, vl + "2," 5 * ■4 +
v5...Valve, Veo, Vel...Emergency valve.

Claims (2)

[Claims] (1) For a clutch actuator that has a piston rod that is pressed to the engaged side by a return spring and pushed to the disengaged side by supplying hydraulic pressure to the pressurizing chamber of the cylinder, the hydraulic pressure in the chamber is bypassed when the clutch is engaged. A clutch actuator control device characterized by being provided with a large flow valve that discharges the liquid into a tank. (2) Clutch actuator control according to claim 1, characterized in that a clutch stroke sensor is provided to detect the clutch stroke position and to operate the large flow valve until the clutch is completely engaged. Device.