Hydraulic control system for lock-up clutch

Details Hydraulic control system for lock-up clutch Hydraulic control system for lock-up clutch

1983-10-06

1986-06-17

Herrmann, Allan D.

192 clutches and power-stop control

Vortex-flow drive and clutch

With brake

192 331, 192103R, B60K 4102

Patent

active

045950881

ABSTRACT:
A hydraulic control system for a lock-up clutch includes a vehicle speed cut valve having a spool movable responsive to a governor fluid pressure between a lock-up position and a non lock-up position. A solenoid valve is provided which is energized such as during coasting of the vehicle or during kickdown operation. When energized, the solenoid valve applies a line fluid pressure to the spool against the governor fluid pressure to forcibly move it to the non lock-up position so as to release the lock-up clutch.

REFERENCES:
patent: 3068974 (1962-12-01), Jandasek
patent: 3691872 (1972-09-01), Schaefer et al.
patent: 4095486 (1978-06-01), Ohnuma
patent: 4289048 (1981-09-01), Mikel et al.
patent: 4305487 (1981-12-01), Sunohara
patent: 4438665 (1984-03-01), Schmidt
patent: 4441385 (1984-04-01), Taga et al.
patent: 4457411 (1984-07-01), Hiramatsu

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