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US 6,270,444 B1Granted
Shift control apparatus for automatic transmission
AssigneeAisin Aw Co., Ltd.
InventorsHiroshi Tsutsui, Kouichi Kojima, Yutaka Teraoka
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AssigneeAisin Aw Co., Ltd.
InventorsHiroshi Tsutsui, Kouichi Kojima, Yutaka Teraoka
Estimating the term…
Quick shifting is achieved while preventing a shift shock when shifting is caused by grip change of four engagement elements. The automatic transmission requires activation of the four engagement elements when shifting from a first shifting position (sixth speed) to a second shifting position (third speed) is performed. This shifting control apparatus includes shift control means for starting disengagement of a second engagement element after starting disengagement of a first engagement element; completing engagement of a fourth engagement element after completing engagement of a third engagement element; and starting disengagement of the second engagement element before completing engagement of the third engagement element.
A shift control apparatus for an automatic transmission in which activation of four engagement elements is required for shifting from a first shifting position to a second shifting position, the first shifting position being achieved by engagement of first and second engagement elements, and the second shifting position being achieved by engagement of third and fourth engagement elements, said control apparatus comprising shift control means wherein:
A shift control method for shifting an automatic transmission in which activation of four engagement elements is required for shifting from a first shifting position to a second shifting position, the first shifting position is achieved by engagement of first and second engagement elements, and the second shifting position being achieved by engagement of third and fourth engagement elements, said control method comprising:
Dependencies are inferred from the claim text.