Up shift control with overrunning clutch

Details Up shift control with overrunning clutch Up shift control with overrunning clutch

2008-03-18

2008-03-18

Pang, Roger (Department: 3681)

Interrelated power delivery controls, including engine control

Transmission control

Transmission controlled by engine

Reexamination Certificate

active

11272535

ABSTRACT:
An automatic transmission for a vehicle includes a multi-plate clutch having an applied state and a released state and an overrunning clutch having an engaged state and an overrunning state. In addition, the transmission includes a controller that effectuates a gear shift of the transmission by applying a volume of fluid to the multi-plate clutch to toggle the multi-plate clutch from the released state to the applied state at approximately the same time the overrunning clutch is toggled into the overrunning state. The applied volume of fluid at which the multi-plate clutch is applied is substantially given by the following equation:in-line-formulae description="In-line Formulae" end="lead"?VF=VL−(k*T)in-line-formulae description="In-line Formulae" end="tail"?where VFis the volume, VLis the instantaneous volume at any time, k is a constant, and T is the input torque to the transmission.

REFERENCES:
patent: 5113722 (1992-05-01), Iizuka
patent: 5235877 (1993-08-01), Takahashi et al.
patent: 6149548 (2000-11-01), Holbrook et al.
patent: 7179189 (2007-02-01), Dourra et al.

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