Adaptive pressure control based on difference between target and

Details Adaptive pressure control based on difference between target and Adaptive pressure control based on difference between target and

1994-10-14

1996-08-20

Ta, Khoi Q.

Interrelated power delivery controls, including engine control

Transmission control

Transmission controlled by engine

477155, F16H 6104

Patent

active

055474373

ABSTRACT:
A shift control system of an automatic transmission includes a first element which is to be released in a shift operation, a second element which is to be engaged in the shift operation, and a target shift time set section for setting a target time period of the shift operation needed for releasing the first frictional element and engaging the second frictional element. A shift time calculation section is provided for obtaining an actual time period of the shift operation needed for releasing the first frictional element and engaging the second frictional element, and a releasing pressure control section is provided for receiving output of the target shift time set section and the shift time calculation section for controlling a releasing pressure of the first frictional element in the shift operation based on the difference between the target and actual time periods of the shift operation. An engaging pressure control section is used for controlling an engaging pressure of the second frictional element in the shift operation. A shift shock is effectively suppressed by the shift control system.

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patent: 5251509 (1993-10-01), Pollack et al.
patent: 5443595 (1995-08-01), Shimei et al.

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