Method for the operation of a drivetrain
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United States of America Patent
Stats
-
Mar 9, 2010
Grant Date -
Dec 13, 2007
app pub date -
May 16, 2007
filing date -
Jun 8, 2006
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
Method of operating a drivetrain, comprising at least an automatic transmission and a drive motor, for improving a speed of successive upshifts or successive downshifts in an overlap manner so that, during a first upshift or downshift, at least one shift element, required for a subsequent second upshift or downshift, is prepared during the first upshift or downshift and, when a synchronization point is reached, the subsequent second upshift or downshift can be carried out immediately. Two successive respective upshifts or downshifts can be carried out as an overlapping single shift by actuating first, second and third shift elements. Implementing the first and the second upshifts or downshifts so that actuation of the second shift element, from the first upshift or downshift to the subsequent second upshift or downshift, occurs via a minimum selection of a first alternative or by a maximum selection of a second alternative.
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