Method for the operation of a drivetrain

Details Method for the operation of a drivetrain Method for the operation of a drivetrain

2011-07-19

2011-07-19

Keith, Jack (Department: 3663)

Data processing: vehicles, navigation, and relative location

Vehicle control, guidance, operation, or indication

Transmission control

C477S034000, C477S075000, C477S097000, C477S184000, C477S107000, C475S254000, C475S256000, C475S266000, C701S036000, C701S051000, C701S055000, C701S058000, C701S064000

Reexamination Certificate

active

07983824

ABSTRACT:
A method for operation of a drivetrain including a drive motor and an automatic transmission having at least five shift elements, of which, at least two elements are disengaged in each forward and reverse gear and the other shift elements are engaged. Two successive shifts are accomplished by two overlapped single gear shifts such that: a) during the first shift, a first shift element is engaged or disengaged while a second shift element is disengaged or engaged; b) during the first shift, second and third shift elements are prepared for either engagement or disengagement; and c) during the first and the second shifts at least one fourth shift element is kept engaged or nearly engaged.

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