Oil temperature responsive hydraulic control system for an autom

Details Oil temperature responsive hydraulic control system for an autom Oil temperature responsive hydraulic control system for an autom

1997-04-04

1999-02-02

Wright, Dirk

Planetary gear transmission systems or components

Fluid drive or control of planetary gearing

Fluid controlled mechanical clutch or brake

F16H 6100

Patent

active

058657029

ABSTRACT:
An oil temperature responsive hydraulic control system for an automatic transmission includes a hydraulic servo for applying/releasing a frictional engagement element; a pressure regulator valve for regulating oil pressure fed to the hydraulic servo; and a signal pressure oil passage for applying a pressure regulating signal pressure to the pressure regulator valve. A control valve is arranged in the signal pressure oil passage for changing the effective diameter of the signal pressure oil passage responsive to change in oil temperature.

REFERENCES:
patent: 3359831 (1967-12-01), Scheiter
patent: 3465614 (1969-09-01), Reynolds
patent: 4199048 (1980-04-01), Ishikawa
patent: 4783000 (1988-11-01), Ty
patent: 5421791 (1995-06-01), Futawatari
Japanese Patent Abstract 07332481, Dec. 22, 1995.
Great Britain, Office Action Jul. 2, 1997.
Japanese Patent Abstract 59-126118, Jul. 20, 1984.

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