Hydraulic control system for automatic transmission

Details Hydraulic control system for automatic transmission Hydraulic control system for automatic transmission

1998-09-02

2000-10-03

Cuchlinski, Jr., William A.

Data processing: vehicles, navigation, and relative location

Vehicle control, guidance, operation, or indication

Transmission control

701 54, 701 61, 701 64, 701 69, 477 34, 477 45, 477107, 477110, 477115, 477117, 477156, B60K 3100, F16H 500

Patent

active

06128565&

ABSTRACT:
In a disengagement side control, in a power on state, a disengagement side pressure P.sub.W is output, P.sub.W being set higher than a base pressure dependent on input torque, and a disengagement side frictional engagement element is engaged and maintained. In a power off state, a disengagement side pressure lower than the base pressure is output, and the disengagement side frictional engagement element slips. In the disengagement side control, when the vehicle driving state is changed from the power off state to the power on state, the disengagement side pressure P.sub.W is changed from that for a slip state to that for a maintain state.

REFERENCES:
patent: 5475595 (1995-12-01), Asahara et al.
patent: 5782711 (1998-07-01), Tsutsui et al.
patent: 5842950 (1998-12-01), Tsutsui et al.

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