Abstract: Traction mechanism drive for an internal combustion engine, having a crankshaft gear wheel, at least one gear wheel which is arranged on a driven shaft, a wrap-around means and an electric machine which can be actuated in order to reduce rotational non-uniformities, the electric machine (9, 10) having a rotor (12) which is arranged on the or a camshaft (1, 11) and interacts with an immobile stator (15).

Abstract: The invention relates to a wraparound drive for an internal combustion engine, having a wraparound means (2) which is configured as a belt or a chain and is guided over drive and output wheels (3, 5, 6) of the crankshaft (4) and at least one camshaft (7, 8) of the internal combustion engine and/or auxiliary assemblies which are to be driven. In order to ensure reliable balancing of the drive by elimination of oscillations and resonances, there is provision for at least one of the drive or output wheels (3, 5, 6) or a deflection wheel (9) to be of unround or eccentric configuration, and/or for at least two tensioning rollers (11, 13) to be provided, one of these tensioning rollers (13) being provided with a damping device (14), or both tensioning rollers (11, 13) being coupled to one another by a damping device (14).

Abstract: Wraparound drive, in particular control drive, for an internal combustion engine, having at least one driving gearwheel and at least one driven gearwheel and a tensioning or deflecting roller and having a wraparound means (toothed belt or chain) which connects said gearwheels and rollers, wherein the driving and/or driven gearwheel is designed according to the ID2 system such that, during rotation, it imparts a nonuniformity to the drive with the aim of damping the drive, wherein at least one additional auxiliary unit is also driven, characterized in that the gearwheel (6, 6?, 6?) of the auxiliary unit is connected to the driving shaft thereof by means of a non-rigid clutch.

Abstract: Traction mechanism drive for an internal combustion. engine, having a crankshaft gear wheel, at least one gear wheel which is arranged on a driven shaft, a wrap-around means and an electric machine which can be actuated in order to reduce rotational non-uniformities, the electric machine (9, 10) having a rotor (12) which is arranged on the or a camshaft (1, 11) and interacts with an immobile stator (15).