Method for the operation of a drivetrain
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United States of America Patent
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-
May 22, 2012
Grant Date -
Sep 22, 2011
app pub date -
Jun 1, 2011
filing date -
Jun 8, 2006
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A method for the operation of a drivetrain comprising an automatic transmission, a motor and at least five shift elements in which two shift elements are engaged and three shift elements are disengaged. When carrying out an upshift or downshift, a first shift element is either disengaged or engaged, and a second shift element is engaged or disengaged. While the first upshift or downshift is being carried out, a second shift element is prepared for disengaging or engaging and a third shift element is prepared for engaging or disengaging. Actuation of the second shift element occurs by virtue of a minimum selection of a first alternative or a maximum selection a second alternative. While the first upshift or downshift is being carried out and while the second upshift or downshift is being carried out, at least one fourth shift element is kept engaged or nearly engaged.
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