JPH0288054U

JPH0288054U -

Info

Publication number: JPH0288054U
Application number: JP16890788U
Authority: JP
Priority date: 1988-12-26
Filing date: 1988-12-26
Publication date: 1990-07-12

Description

[Brief explanation of the drawing]

第１図は本考案を採用したクラツチ油圧制御装
置の回路図、第２図は油圧―クラツチトルク―時
間特性を示すグラフである。１０……第１アキユ
ームレータ、１１……入口油路、（油圧供給油路
の一部）、１２……出口油路、（油圧供給油路の
一部）、１３……チヤージポンプ、（油圧供給源
）、１５……切換弁、１７……第１蓄圧室、１８
……第１ピストン、１９……第１スプリング、２
０……連絡油路、２１……第２アキユームレータ
、２２……第２蓄圧室、２３……第２ピストン、
２４……第２スプリング。 FIG. 1 is a circuit diagram of a clutch hydraulic control device employing the present invention, and FIG. 2 is a graph showing hydraulic pressure-clutch torque-time characteristics. DESCRIPTION OF SYMBOLS 10...First accumulator, 11...Inlet oil path, (part of hydraulic supply oil path), 12...Outlet oil path, (part of hydraulic supply oil path), 13...Charge pump, (hydraulic supply source), 15... switching valve, 17... first pressure accumulation chamber, 18
...First piston, 19...First spring, 2
0... Communication oil passage, 21... Second accumulator, 22... Second pressure accumulation chamber, 23... Second piston,
24...Second spring.

Claims

[Scope of utility model registration request]

a first accumulator disposed between a hydraulic supply oil passage extending from a hydraulic pressure supply source to a switching valve;
The first accumulator includes a first pressure accumulation chamber connected to the hydraulic pressure supply oil passage, a first piston facing the first pressure accumulation chamber, and a first spring biasing the first piston toward the first pressure accumulation chamber. In the modulating mechanism for a hydraulic control valve, a second accumulator separate from the first accumulator is provided, and the second accumulator has a second pressure accumulator and a second accumulator.
The second pressure accumulation chamber includes a second piston that faces the pressure accumulation chamber and a second spring that biases the second piston toward the second pressure accumulation chamber, and the second pressure accumulation chamber has a second piston that faces the second pressure accumulation chamber. The spring constant of the first and second springs and the diameters of the first and second pistons are determined by the first pressure accumulation chamber, which opens on the inner wall surface of the first pressure accumulation chamber and communicates with a communication oil passage opened and closed by the first piston. When the oil pressure in the chamber rises to a desired value, the hydraulic oil in the first pressure accumulation chamber is supplied to the second pressure accumulation chamber through the communication oil passage, thereby increasing the oil pressure in the first pressure accumulation chamber for a predetermined period of time. A modulating mechanism for a hydraulic control valve, characterized in that each hydraulic pressure control valve is set to maintain a substantially constant value.