Patent ID: 8328681

Claim:
A method of operating of a drive train of a motor vehicle, whereby the drive train comprises at least a hybrid drive with a combustion engine and an electric motor, a transmission which is positioned along the hybrid drive and an output, and a clutch being positioned between the combustion engine and the electric motor, whereby at a time when the electric motor exclusively drives, the combustion engine can be started by engaging the clutch, positioned between the combustion engine and the electric motor, the method comprising the steps of: initiating the starting of the combustion engine when driving exclusively with the electric motor, while the electric motor is being operated in a deceleration mode, and upon obtaining a request by the driver which is interpreted as a desired change from a deceleration mode to a traction mode, and starting the combustion engine, while changing from the deceleration mode to the traction mode, by at least partially engaging the clutch, positioned between the combustion engine and the electric motor, such that the clutch transfers a required torque for starting the combustion engine.