Method and apparatus for providing momentary torque reversal...

Details Method and apparatus for providing momentary torque reversal... Method and apparatus for providing momentary torque reversal...

2006-01-03

2006-01-03

Lewis, Tisha (Department: 3681)

Interrelated power delivery controls, including engine control

Transmission control

With clutch control

C477S077000, C477S079000, C477S111000, C477S112000, C074S335000, C074S339000

Reexamination Certificate

active

06981931

ABSTRACT:
An automated vehicle transmission having a wet clutch and an auxiliary motor that is operatively connected to the transmission to overcome residual torque forces in the wet clutch. Residual torque forces in the wet clutch may prevent disengagement of a gear train and also prevent the transmission from shifting into neutral. A control system determines whether residual torque is resisting the disengagement of the gear train for more than a predetermined time period. According to the method, if a shift is delayed for more than the predetermined time period, the auxiliary motor is actuated to apply an oppositely oriented torque to the transmission gear train to overcome the residual torque and allow the transmission to shift into neutral.

REFERENCES:
patent: 5511437 (1996-04-01), Braun
patent: 5729454 (1998-03-01), Amsallen
patent: 5735770 (1998-04-01), Omote et al.
patent: 6393928 (2002-05-01), Watanabe
patent: 6561948 (2003-05-01), Markyvech et al.
patent: 6634986 (2003-10-01), Kima
patent: 6692406 (2004-02-01), Beaty
patent: 6916270 (2005-07-01), Genise
patent: 2005/0164827 (2005-07-01), Beaty et al.

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