Patent ID: 8423230

Claim:
A method of controlling a parallel hybrid drive-train of a vehicle comprising an automatic transmission ( 5 ), a combustion engine ( 2 ) being connectable, via a separation clutch ( 3 ), to an electrical machine ( 4 ), and the electrical machine ( 4 ) being connected, via a drive shaft, to a starting clutch ( 6 ) located within the automatic transmission ( 5 ), the method comprising the steps of: monitoring operation of the starting clutch ( 6 ) to recognize a failure of the starting clutch ( 6 ) to disengage, performing a test of the starting clutch ( 6 ), between gear shifts, for determining an ability of the starting clutch ( 6 ) to disengage, and upon recognizing the failure of the starting clutch ( 6 ) to disengage, initiating and processing a predetermined failure correction so as to one of continue a drive driving operation of the vehicle or commence a slowing down operation of the vehicle to a stop.