System for controlling servo activating hydraulic pressure occur

Details System for controlling servo activating hydraulic pressure occur System for controlling servo activating hydraulic pressure occur

1990-05-29

1991-08-13

Diehl, Dwight

Machine element or mechanism

Rotary member or shaft indexing, e.g., tool or work turret

Preselected indexed position

B60K 4106

Patent

active

050386352

ABSTRACT:
According to the present invention, in order to effect a shockless shift in an automatic transmission of a vehicular power train, a servo activating hydraulic fluid pressure applied to a shifting friction unit is controlled in response to a predetermined variable other than an engine throttle opening which causes a change in engine output torque from a predetermined pattern of variation of the engine output torque against variation of the engine throttle opening.

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