Automatic transmission control system

Details Automatic transmission control system Automatic transmission control system

1990-09-25

1991-06-11

Wright, Dirk

Machine element or mechanism

Rotary driven device adjustable during operation relative to...

Screw and nut adjusting means

74867, B60K 4118

Patent

active

050222848

ABSTRACT:
An automatic transmission shift control device has a plurality of multiple element friction engaging devices. Also provided is a shift timing valve having a return spring and port, a throttle valve operator, an oil temperature sensor and a controller for operation the throttle valve operator so that the accumulator back pressure modulated by the throttle pressure is less than that provided when the oil temperature is under a predetermined value as compared to when the oil temperature sensed by the oil temperature sensor is greater than the predetermined value.

REFERENCES:
patent: 4637281 (1987-01-01), Van Selous
patent: 4779489 (1988-10-01), Haley
patent: 4854195 (1989-08-01), Morato et al.
patent: 4856381 (1989-08-01), Funahashi et al.
patent: 4930376 (1990-06-01), Van Selous

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