Patent ID: 8647237

Claim:
A method of operating a drive train of a motor vehicle having a motor selectively coupled to the drive train by a clutch that is actuable by an actuator, the clutch including a first clutch part associated with a drive shaft of the motor and a second clutch part associated with the drive train, with an engagement of the clutch comprising the steps of: accelerating the first clutch part by the motor to reduce a rotational speed difference between the first clutch and the second clutch part with a simultaneous activation of the actuator during a first actuation phase to overcome a dead space of the clutch, wherein the first and second clutch parts are not engaged during the first actuation phase; suspending the activation of the actuator after overcoming the dead space and before bringing the first and second clutch parts into engagement until a predefined rotational speed difference is reached; activating the actuator again during a second actuation phase to bring the first and second clutch parts into engagement when the predefined rotational speed difference is reached or is fallen below.