Patent ID: 6638196
Filing Date: 2003-10-28
Classification: F16H,Y10T

Abstract:
A shift control apparatus for effecting a shift in an automatic transmission by changeover of friction elements to be engaged with disengagement of a disengagement-side friction element and engagement of a disengagement-side working oil pressure and engagement of an engagement-side friction element by increase of an engagement-side working oil pressure, the shift control apparatus comprising a shift controller configured:to detect an end of a loss stroke in the engagement-side friction element; to decrease the disengagement-side working oil pressure at a set gradient after the detection of the end of the loss stroke in the engagement-side friction element; to increase the engagement-side working oil pressure at a predetermined gradient after the detection of the end of the loss stroke in the engagement-side friction element; and to make the predetermined gradient of the engagement-side working oil pressure for the engagement-side friction element lower for a low engine load than for a high engine load.