Hydraulic control device for use in an automatic transmission

Details Hydraulic control device for use in an automatic transmission Hydraulic control device for use in an automatic transmission

1975-12-18

1977-11-15

Wyche, Benjamin W.

192 clutches and power-stop control

Elements

Thrust members, retarders, and stops

192 8713, F16D 2510

Patent

active

040581934

ABSTRACT:
A hydraulic control device for use in an automatic transmission includes an accumulator which moderates the increased fluid pressure supplied to a hydraulically actuated frictional engagement device when a gear shift is made to a forward drive condition. The hydraulic control device has an orifice and a check valve disposed in parallel to each other in a passage supplying the fluid pressure to the frictional engagement device so that the check valve is closed and the orifice reduces the increased fluid pressure supplied to the frictional engagement device as the frictional engagement device is actuated.

REFERENCES:
patent: 3158037 (1964-11-01), Searles
patent: 3572177 (1971-03-01), Ishihara
patent: 3618424 (1971-11-01), Golan et al.

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