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US 6,638,196 B2Granted
Shift control apparatus of automatic transmissions
AssigneeJATCO Ltd
InventorsTakashi Murasugi, Takashi Sano, Kazunari Otake
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AssigneeJATCO Ltd
InventorsTakashi Murasugi, Takashi Sano, Kazunari Otake
Estimating the term…
A shift control apparatus is arranged to effect 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 an engagement-side friction element. A shift controller is configured to detect an end of a loss stroke in the engagement-side friction element, and performs an operation to decrease the disengagement-side working oil pressure at a set gradient and to increase the engagement-side working oil pressure at a predetermined gradient upon detection of the end of the loss stroke in the engagement-side friction element. The predetermined gradient of the engagement-side working oil pressure for the engagement-side friction element is made lower for a low engine load than for a high engine load.
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:
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 by decrease 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:
Dependencies are inferred from the claim text.