US Patent 7717821 Method for the operation of a drivetrain

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 three shift elements are engaged in each forward and reverse gear and the other shift elements are disengaged. 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.