Patent ID: 7674203
Filing Date: 2010-03-09
Classification: F16H,Y10T

Abstract:
1. A method of operating a drivetrain for a motor vehicle comprising at least an automatic transmission and a drive motor, the method improving a shift speed of at least one of successive upshifts and successive downshifts in an overlapped manner such that during a first upshift or a first downshift at least one shift element required for a successive upshift or a successive downshift is prepared during the first upshift or the first downshift such that when a synchronization point of the first upshift or the first downshift is reached, the successive upshift or the successive downshift can be immediately carded out, the method comprising the steps of: carrying out one of two successive upshifts or two successive downshifts as overlapping single shifts by actuating three shift elements in such manner that: