Method for operating a hybrid double clutch transmission drive train

The drive power from the electric machine (40) is transferred via the transmission portion (22). The driving power from the engine (12) is transmitted through transmission portion (32). The transmission portion (22) is connected with the friction clutch (20), so that friction clutch transmits a rotational torque corresponding to driving torque provided by electric machine. The source gear (G2,G4) is laid in transmission portion (22).