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AssigneeAisin Aw Co., Ltd.
InventorsMasahiro Hayabuchi, Masaaki Nishida, Hiroshi Tsutsui, Kouichi Kojima, Yutaka Teraoka
Estimating the term…
The invention eliminates the feeling of two-phase speed-change operations by causing a speed-change operation to proceed continuously when the speed-change operation is performed through two-phase control of engagement and release of four engagement elements. An automatic transmission is such that a predetermined speed-change operation is achieved through a pre-phase speed-change operation in which a first engagement element and a third engagement element are released and engaged respectively and through a post-phase speed-change operation in which a second engagement element and a fourth engagement element are released and engaged respectively. A control apparatus has a torque control capability for adjusting an input torque of a transmission during the pre-phase speed-change control, and ensures continuous changes in the input speed during the pre-phase and post-phase speed-change operations through adjustment of the input torque (torque reduction) to prevent bluntness from being caused between the pre-phase and post-phase speed-change operations.
A control apparatus for an automatic transmission wherein operation of four engagement elements is required at the time of a speed-change operation from a first speed-change stage to a second speed-change stage, wherein the first speed-change stage is established through engagement of a first engagement element and a second engagement element, and wherein the second speed-change stage is established through engagement of a third engagement element and a fourth engagement element, comprising:
A control apparatus for an automatic transmission wherein operation of four engagement elements is required at the time of a speed-change operation from a first speed-change stage to a second speed-change stage, wherein the first speed-change is established through engagement of a first engagement element and a second engagement element, and wherein a second speed-change is established through engagement of a third engagement element and a fourth engagement element comprising:
A control apparatus for an automatic transmission wherein operation of four engagement elements, namely, first to fourth engagement elements is required at the time of a speed-change operation from a first speed-change stage to a second speed-change stage, comprising:
Dependencies are inferred from the claim text.