Automatic transmission control system

Details Automatic transmission control system Automatic transmission control system

1996-01-30

1998-07-28

Ta, Khoi Q.

Interrelated power delivery controls, including engine control

Transmission control

Transmission controlled by engine

477143, 477155, F16H 6100

Patent

active

057856281

ABSTRACT:
A control system for an automatic transmission having friction coupling elements, at least one of which is locked in 3rd and 4th gears and unlocked in 1st and 2nd gears, includes a first shift valve shiftable between 3rd and 4th gears, and second shift valve shiftable between in 2nd gear and 1st gear in which engine brake available, and a solenoid valve providing control pressure which is selectively directed to these shift valves and cause them to shift so as to lock or unlock the friction coupling elements.

REFERENCES:
patent: 4791568 (1988-12-01), Hiramatsu et al.
patent: 4944200 (1990-07-01), Benford et al.
patent: 5003842 (1991-04-01), Hatta et al.
patent: 5027676 (1991-07-01), Fujiwara et al.
patent: 5109734 (1992-05-01), Fujiwara
patent: 5507706 (1996-04-01), Jang et al.

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