Device and method for transferring a maximum drive torque without slip

The method involves determining target parameter for an internal combustion engine (14) for adjusting engine to the target characteristic quantity. The size of output torque (50) is detected for determining the actually transmitted output torque from output shaft (22) to determine control variable for an electric motor (34), such that moment sum of additional torque and detected output torque is equal to target torque at any time of a control process, so that electric motor on controlled variable (46) is regulated, and electric motor is coupled to output shaft of gearbox (16).