Model based kickdown shift method for clutch to clutch shift...

Details Model based kickdown shift method for clutch to clutch shift... Model based kickdown shift method for clutch to clutch shift...

2005-12-20

2005-12-20

Camby, Richard M. (Department: 3661)

Data processing: vehicles, navigation, and relative location

Vehicle control, guidance, operation, or indication

Transmission control

C701S058000, C192S003250, C074S731100, C475S125000

Reexamination Certificate

active

06978201

ABSTRACT:
A transmission control method improves shift feel during kickdown shifts. The release clutch is fully released at the initiation of the kickdown shift. The release clutch is then reapplied when the volume of the release clutch reaches a threshold capacity. The volume of the release clutch is slowly ramped down, thereby increasing turbine speed. When the turbine speed reaches a threshold, the apply clutch is actuated. The apply clutch is actuated by controlling the volume of the apply clutch according to a target volume.

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