Interrelated power delivery controls – including engine control – Transmission control – With clutch control
Reexamination Certificate
2011-05-03
2011-05-03
Pang, Roger (Department: 3655)
Interrelated power delivery controls, including engine control
Transmission control
With clutch control
C477S185000, C477S186000, C477S903000
Reexamination Certificate
active
07935024
ABSTRACT:
A method for the operation of an automatic transmission in a motor vehicle. The downshifting of the transmission takes advantage of a braking action of a driving motor connected to the automatic transmission through a clutch, are terminated by the closing of a clutch during a compression phase lasting until the achievement of a predetermined threshold speed. For the improvement of the immediacy of the vehicle drive after the termination of the compression phase, the invention provides that at speeds less than the threshold speed, downshifting is carried out and is terminated with an open clutch.
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Wengert Bertram
Winkel Matthias
Davis & Bujold P.L.L.C.
Pang Roger
ZF Friedrichshafen AG
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