Patent ID: 9011290
Filing Date: 2015-04-21
Classification: B60W,F02N,Y10T

Abstract:
1. A method of operating a vehicle drive-train ( 1 ) during a starting process, the drive-train comprising a drive mechanism ( 2 ) to which is couplable a continuously-variable power-branched transmission device ( 3 ), in which a plurality of transmission ratio ranges are engagable, transmission ratios can be varied continuously within the plurality of transmission ratio ranges by adjusting a variator ( 24 ), and the drive-train ( 1 ) also comprises a drive output ( 8 ), the method comprising the steps of: producing a force flow in a frictional shifting element ( engaging a starting transmission ratio in the transmission device ( adjusting the transmission capacity of the frictional shifting element ( when the start command is issued, preparing a further shifting element ( starting a pre-filling phase of the further shifting element (