Patent ID: 9217503
Filing Date: 2015-12-22
Classification: F16H,Y10T

Abstract:
1. A method of operating a vehicle drive-train ( 1 ) which comprises an internal combustion engine ( 2 ) and a transmission ( 3 ) that is functionally connected to the internal combustion engine ( 2 ) by a transmission input shaft ( 6 ), the transmission having a first interlocking shifting element (A) which comprises a first interlocking shifting element half (A 6 ), which is functionally connected to the transmission input shaft ( 6 ), the first interlocking shifting element (A) further comprising a second interlocking shifting element half (A 7 ) which is functionally connected to a transmission output shaft ( 7 ), the method comprising the steps of: maintaining a second interlocking shifting element (F) in an engaged condition when the transmission ( upon receiving a command to change from the neutral operating condition (“N”), in which a force flow in the transmission ( engaging the first interlocking shifting element (A), when the actual rotational speed difference is within the speed difference window, to produce the force flow in the transmission (