Patent ID: 7662063

Claim:
A method of operating a drive train of a motor vehicle, having a drive motor ( 14 ), a shift transmission ( 10 ) which is actuated by an external force and includes an unsynchronized main transmission ( 18 ) and a synchronized final drive unit ( 19 ), a clutch ( 12 ) which is actuated by an external force and is arranged between the drive motor ( 14 ) and the shift transmission ( 10 ), and a control device ( 49 ) for operating the drive motor ( 14 ), the transmission ( 10 ) and the clutch ( 12 ), wherein, in a normal mode of the drive motor ( 14 ) in the event of a shift to a target gear in the main transmission ( 18 ), a synchronization of a transmission input shaft ( 11 ) to a synchronous rotational speed of the target gear is carried out by the drive motor ( 14 ), for engaging the target gear in an emergency mode of the drive motor ( 14 ), the following steps are carried out: opening the clutch ( 12 ), setting a neutral position in the final drive unit ( 19 ), engaging the target gear, setting a drive position in the final drive unit ( 19 ) and at least partially closing the clutch ( 12 ).