Hydraulic control system for automatic transmission having torqu

Details Hydraulic control system for automatic transmission having torqu Hydraulic control system for automatic transmission having torqu

1983-10-03

1986-08-26

Bonck, Rodney H.

192 clutches and power-stop control

Vortex-flow drive and clutch

Including drive-lockup clutch

192 331, F16H 4502, F16H 564

Patent

active

046077316

ABSTRACT:
A lock-up valve includes a spool movable between a clutch engagement position wherein the lock-up clutch is engaged and a clutch release position wherein the engagement of the lock-up clutch is released. A spring biases the spool toward the clutch release position. The spool has a first pressure acting area and a second pressure acting area. A fluid pressure is applied to the first pressure acting area during operation in one of the m th speed ratio and m+1 th speed ratio. An auxiliary valve is provided which allows the application of another fluid to the second pressure acting area during operation in the other speed ratio.

REFERENCES:
patent: 3977502 (1976-08-01), Chana
patent: 3985046 (1976-10-01), Morris et al.
patent: 4095486 (1978-06-01), Ohnuma
patent: 4270636 (1981-06-01), Sunohara et al.
patent: 4294140 (1981-10-01), Iwanaga et al.
patent: 4305487 (1981-12-01), Sunohara
patent: 4349088 (1982-09-01), Ito et al.
patent: 4428259 (1984-01-01), Kubo et al.
patent: 4474084 (1984-10-01), Sugano et al.

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