Method for operating an automatic gearbox on a motor vehicle

Details Method for operating an automatic gearbox on a motor vehicle Method for operating an automatic gearbox on a motor vehicle

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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