Control system for automatic transmission featuring improved dow

Details Control system for automatic transmission featuring improved dow Control system for automatic transmission featuring improved dow

1988-10-31

1991-08-27

Braun, Leslie A.

Machine element or mechanism

Rotary member or shaft indexing, e.g., tool or work turret

Preselected indexed position

F16H 6116

Patent

active

050423290

ABSTRACT:
A shift valve which controls the shifting of the transmission between the top speed and the next lower one is arranged to have a port which is communicable with an overrunning clutch viz a relatively short conduit arrangement. The port is arranged to be constantly supplied with line pressure while the manual valve is set in any of the forward drive ranges, and to be communicated with the conduit when the shift valve is supplied with a top speed inhibit signal and induced to assume its downshift position.

REFERENCES:
patent: 4106369 (1978-08-01), Taga
patent: 4291596 (1981-09-01), Sakakibara
patent: 4406181 (1983-09-01), Kubo et al.
patent: 4485695 (1984-12-01), Kawamoto
patent: 4566355 (1986-01-01), Sugano
patent: 4719822 (1988-01-01), Morisawa
patent: 4823648 (1989-04-01), Hayakawa et al.
patent: 4967611 (1990-11-01), Sugano
THM 700-R4 Principles of Operation, Hydra-Matic, Second Edition, pp. 68, 70.

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