JPH02141729U - - Google Patents

Description

[Brief explanation of drawings]

Fig. 1 is a vertical sectional view showing an embodiment of the clutch booster according to the present invention, Fig. 2 is an input/output characteristic diagram showing the hysteresis of the device, and Fig. 3 is a modification of the above embodiment. A partial cross-sectional view of a clutch booster, Figure 4 is a diagram of a conventional clutch operation system, Figure 5 is a cross-sectional view of a control valve of a conventional clutch booster, and Figure 6 is its control. FIG. 3 is a cross-sectional view showing the operating state of the valve. 20...Clutch booster, 21...Power cylinder section, 22...Hydraulic cylinder section, 23...
Control valve part, 24...Housing, 26
...Power piston, 29...Pressure chamber, 31...Relay piston, 32...Push rod, 33...Output rod, 40...Oil fluid port, 41...First passage, 43
...Relay valve, 44...Release valve, 45,
46... Valve body, 47, 48... Valve lifter, 49,
50... Pneumatic chamber, 51, 52... Variable pressure chamber, 53, 54
...Hydraulic chamber, 55...Pipe line, 56...Second passage, 57
...Third passage, 58...Fourth passage, 59,60...
Compression spring, 61, 62... Valve seat, 63, 64
...chamber, 65...port, 66, 67...exhaust passage, 6
8,69...Compression spring.

Amendment July 15, 2001 The scope of claims for utility model registration is amended as follows.

[Scope of claims for utility model registration] (1) The scope of claims for utility model registration in the description is corrected as shown in the attached sheet. (2) "Closing" on the last line of page 7 of the specification is corrected to "Opening". (3) In the same book, page 13, line 15, "during this" is corrected to "continued." (4) At the end of page 13 of the same book, after "further", add "when the pressure in the hydraulic chamber 53 increases".

Claims (1)

[Scope of utility model registration request] a pneumatic chamber that communicates with the air reservoir through the valve body and the valve lifter;
A variable pressure chamber communicating with the power cylinder and a hydraulic chamber communicating with the master cylinder each include a relay valve and a release valve,
The biasing force of the relay valve against the valve lifter toward the hydraulic chamber is set to be smaller than the biasing force of the release valve against the valve lifter, and as the pressure in the hydraulic chamber increases due to the oil of the master cylinder, the valve lifter of the relay valve By moving the valve lifter forward and bringing the valve lifter into contact with the valve body to open the valve body, compressed air from the air reservoir flows from the air pressure chamber into the variable pressure chamber, and the compressed air is transferred to the variable pressure chamber. At the same time, the valve lifter of the release valve is moved forward, and the valve lifter is brought into contact with the valve body to maintain the valve body in a closed state, while the oil of the master cylinder is As the pressure in the hydraulic chamber decreases due to the liquid, the release valve is moved back to move the valve lifter away from the valve body, and as the pressure in the hydraulic chamber further decreases, the valve lifter of the relay valve is moved back, A clutch booster characterized in that the valve element is closed by separating the valve lifter from the valve element.