Arrangement for control of line fluid pressure in automatic tran

Details Arrangement for control of line fluid pressure in automatic tran Arrangement for control of line fluid pressure in automatic tran

1992-11-20

1994-12-27

Lorence, Richard M.

Interrelated power delivery controls, including engine control

Transmission control

Transmission controlled by engine

477163, 192 85R, 192111A, F16H 6104

Patent

active

053760581

ABSTRACT:
A fluid pressure control arrangement for an automatic transmission comprises a control unit for calculating a shifting frequency and a determining a frictional coefficient of frictionally engageable elements of the transmission. Fluid pressure correction is calculated based on the shifting frequency and a throttle valve opening angle detected by a sensor. A signal indicative of the fluid pressure correction value is output to actuate a solenoid for effecting adjustment of fluid pressure in the automatic transmission for adjusting the line pressure in accordance with the determined frictional coefficient of the frictionally engageable elements to maintain sufficient engagement capacity of the frictionally engageable elements.

REFERENCES:
patent: 4440279 (1984-04-01), Schreiner
patent: 4730521 (1988-03-01), Hayasaki et al.
patent: 5303615 (1994-04-01), Iizuka

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