Control apparatus of an automatic transmission with a lock-up cl

Details Control apparatus of an automatic transmission with a lock-up cl Control apparatus of an automatic transmission with a lock-up cl

1984-03-01

1986-10-21

Bonck, Rodney H.

192 clutches and power-stop control

Vortex-flow drive and clutch

Including drive-lockup clutch

192 331, 192 358, F16H 4502, F16D 3316, B60K 4122

Patent

active

046180389

ABSTRACT:
A control apparatus in an automatic transmission includes first and second shift valves which are independently actuable to define four distinct states corresponding to four speed ranges of the transmission. In the first state, neither valve participates in achieving the first range. In the second state, only the first valve participates in achieving the second range. In the third state, only the second valve participates in achieving the third range. In the fourth state, both valves participate in locking a lock-up clutch by being fluidly interconnected by an interconnecting passage so as to define a signal pressure passage which conducts a signal pressure to a lock-up relay valve to implement a locking of the lock-up clutch.

REFERENCES:
patent: 3505907 (1970-04-01), Fox et al.
patent: 3638771 (1972-02-01), Chana
patent: 3656371 (1972-04-01), Schaefer
patent: 3688607 (1972-09-01), Marlow
patent: 3691872 (1972-09-01), Schaefer et al.
patent: 4431096 (1984-02-01), Kobayashi et al.
patent: 4471438 (1984-09-01), Futagi et al.
patent: 4512212 (1985-04-01), Ishikawa

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