Automotive powertrain and method for reducing juddering vibrations in such

摘要

A method for reducing juddering vibration in a motor vehicle drive train having an internal combustion engine (10) as a drive and a clutch device, wherein a rotating component of the drive train driven by means of the internal combustion engine (10) and the rotational speed of the component is detected, and it is detected whether Rupfschwingungen are present, wherein the occurrence of Rupfschwingungen for actively damping the Rupfschwingungen with the aid of an electric motor (11) such a torque is transmitted to the rotating component, that in a Rupfschwingungskomponente in which the rotational speed of the rotating component decreases, the rotating component by means of the electric motor (11) driven and in a Rupfschwingungskomponente in which the rotational speed of the rotating component increases, the rotating component is braked by means of the electric motor, characterized in that the motor vehicle drive train, the internal combustion engine (10), the electr omotor (11), the clutch device and a parallel shift transmission having a drive part and a first input shaft (17a) and a second input shaft (17b), that the clutch means comprises a first clutch (K1) for connecting the drive part to the first input shaft (17a) and a second clutch (K2) for connecting the drive part to the second input shaft (17b), comprising the following steps: a. the clutches (K1, K2) are brought into an open position, in which the first input shaft (17a) and the second input shaft (17b) are separated from the drive part, b. for a starting operation, the parallel shift transmission is adjusted such that the first input shaft (17a) is in drive connection via a first gear and the second gear shaft (17b) via a second gear to an output shaft (22) of the parallel shift transmission, c. the first clutch (K1) is at least closed so far that it can transmit a torque, d. it is detected whether there are juddering vibrations e. if juddering vibrations are present, a torque is transmitted to the second input shaft (17b) with the aid of the electric motor (11) such that, in the case of a juddering component in which the rotational speed of the second input shaft (17b) decreases, the torque is reduced by means of the electric motor (11). driven and at a Rupfschwingungskomponente in which the rotational speed of the second input shaft (17b) increases, this is decelerated by means of the electric motor (11), f. it is continued with step d).