DRIVE SYSTEM FOR A VEHICLE

The invention relates to a drive system for a vehicle, comprising an internal combustion engine and a torsional vibration damping assembly (10), wherein the torsional vibration damping assembly (10) comprises a primary side (12), preferably coupled to a crankshaft, and a secondary side (18), which can be rotated against the effect of a damper element assembly (22) in respect of the primary side (12), wherein the damper element assembly (22) comprises at least two damper stages (34, 26), wherein a first damper stage (34) has effect having less stiffness substantially in a first relative rotational angle region between the primary side (12) and the secondary side (18) and a second damper stage (26) having greater stiffness substantially in a second relative rotational angle region between the primary side (12) and secondary side (18), furthermore comprising at least one deflection mass pendulum unit (40) having a deflection mass carrier (42) and a deflection mass assembly (45) supported by a deflection mass coupling assembly (54) on the deflection mass support (42) which can be deflected out of a base relative position in respect thereof, characterized in that a transition torque to be applied to generate a transition from the first rotational angle region to the second rotational angle region corresponds to a maximal torque which can be output by the internal combustion engine at a transition speed, wherein the transition speed lies in the range from 900 to 1,200 rpm and/or in the range of a maximal torque speed at which the internal combustion engine can output the maximal torque thereof.