Electronic and hydraulic control system of a 4-speed automatic t

Details Electronic and hydraulic control system of a 4-speed automatic t Electronic and hydraulic control system of a 4-speed automatic t

1996-07-16

1997-07-01

Marmor, Charles A.

Planetary gear transmission systems or components

Fluid drive or control of planetary gearing

Fluid controlled mechanical clutch or brake

475120, 475127, 475128, 477906, F16H 5970, F16H 6112

Patent

active

056431236

ABSTRACT:
Electronic and hydraulic control system of an automatic transmission for automotive vehicle and method for controlling hydraulic pressure whereby line hydraulic pressure can be compensated. A hydraulic pressure state within the electronic and hydraulic control system is precisely detected and the signal of this detected hydraulic pressure is transmitted to a transmission control unit such that the malfunction of the valves and the correct gear shifting stage can be determined. Since the hydraulic pressure state can be detected to be compensated by the control of the TCU, the shift quality can be improved.

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