Automatic transmission control system

Details Automatic transmission control system Automatic transmission control system

1993-05-25

1995-02-14

Wright, Dirk

Planetary gear transmission systems or components

Fluid drive or control of planetary gearing

Fluid controlled mechanical clutch or brake

475146, F16H 6108

Patent

active

053890469

ABSTRACT:
A hydrokinetic, multiple-ratio torque converter transmission mechanism having a simplified valve system with variable force solenoids for controlling line pressure as well as ratio shifts, a simplified clutch-and-brake hydraulic circuit with separate fluid pressure feed and exhaust passages, a common accumulator arrangement for controlling each of two ratio upshifts and a simplified brake servo mechanism having the dual function of establishing a torque reaction point for each of two distinct transmission ratios.

REFERENCES:
patent: 3996817 (1976-12-01), Winzeler
patent: 4224837 (1980-09-01), Croswhite
patent: 4628771 (1986-12-01), Person et al.
patent: 4805750 (1989-02-01), Nitz
patent: 4875391 (1989-10-01), Leising et al.
patent: 4938097 (1990-07-01), Pierce
patent: 5029087 (1991-07-01), Cowan et al.
patent: 5086670 (1992-02-01), Nitz et al.
patent: 5150297 (1992-09-01), Daubenmier et al.
patent: 5157608 (1992-10-01), Sankpal et al.
patent: 5188570 (1993-02-01), Wakahara
patent: 5232411 (1993-08-01), Hayashi et al.
patent: 5288279 (1994-02-01), Sakai et al.
patent: 5315898 (1994-05-01), Koyama et al.

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