Hydraulic pressure control apparatus for servo system of automat

Details Hydraulic pressure control apparatus for servo system of automat Hydraulic pressure control apparatus for servo system of automat

1994-09-07

1996-07-23

Wright, Dirk

Planetary gear transmission systems or components

Fluid drive or control of planetary gearing

Fluid controlled mechanical clutch or brake

F16H 560

Patent

active

055384803

ABSTRACT:
A pressure control apparatus which controls a hydraulic pressure to be supplied to a hydraulic servo system of an automatic transmission. The pressure control valve includes a shift control valve for controlling the hydraulic pressure to be supplied to the servo system upon receiving the feedback from the servo system and an accumulator disposed between the pressure control valve and the servo system through an orifice. The feedback portions of the pressure control valve have the same area with each other. Therefore, a build-up time of the hydraulic pressure to the servo system is kept constant without being effected by a line pressure and a back pressure of the accumulator.

REFERENCES:
patent: 4679450 (1987-07-01), Hayakawa et al.

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