Automatic transmission with one-way clutch friction suppression

Details Automatic transmission with one-way clutch friction suppression Automatic transmission with one-way clutch friction suppression

1993-03-03

1995-04-04

Koczo, Michael

Planetary gear transmission systems or components

Fluid drive or control of planetary gearing

Fluid controlled mechanical clutch or brake

475120, 475129, 475131, B60K 4124

Patent

active

054032423

ABSTRACT:
Under a higher speed gear position of the transmission, a control valve can drain a hydraulic pressure of a forward clutch to cause the forward clutch to take a disengaged condition. With this, undesired friction of a forward one-way clutch under such higher speed gear position is suppressed. A fail-safe system is employed for recovering an engaged condition of the forward clutch even when the control valve is stuck at such pressure draining position.

REFERENCES:
patent: 4501174 (1985-02-01), Sugano
patent: 4709597 (1987-12-01), Yasue et al.
patent: 4718310 (1988-01-01), SHindo et al.
"Maintenance Manual of Nissan Vehicle", Nissan Motor Co., Ltd., Aug., 1991.

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