Method for controlling a powertrain and drivetrain for a motor vehicle

A method for controlling a drive train (10) of a motor vehicle, comprising - an internal combustion engine (12) having an engine output shaft (14) which can act on the drive train (10) with a torque Mv; - one with the motor output shaft (14) standing in rotary driving connection switchable separating means (K2, 38; 40) with which a to drive wheels (26) of the motor vehicle leading part of the drive train (10) of the internal combustion engine (12) can be separated, - a valve disposed in the torque transmission coupling member (36) having an input side (36a) and an output side coupled thereto with a clearance (36b) - an electric machine (18) which can act on the drive train (10) under predetermined operating conditions, with a torque Me for closing the game on the coupling element (36), characterized, - that the lost motion coupling element (36) in the torque transmission path between the engine output shaft (14) and the separating device (K2, 38; 40) arranged and the engine (12) is open, separating means (K2, 38; 40) of the drive wheels (26) decouples is, the torque electrically generated Me combustion engine side of or at the separating means (K2, 38; 40) is introduced into the drive train and the torque electrically generated Me is directed opposite to the torque Mv combustion engine-generated.