Drive system

A drive system comprising

• a drive shaft which can be brought into torque-transmitting connection with a drive train,
• a secondary drive system for transmitting torque between the drive shaft and at least one auxiliary unit, said secondary drive system comprising an auxiliary drive wheel coupled to be rotated by said drive shaft, said auxiliary drive wheel comprising a pulley having a pair of belt guide sections.
• a vibration damping device comprising a deflection mass carrier with freedom to rotate about a rotational axis, said deflection mass carrier forming part of the auxiliary drive wheel, said deflection mass carrier having axially opposed sides and at least one free space extending between said sides, said device further comprising at least one deflection mass in each said at least one free space, wherein each said deflection mass can shift with respect to the deflection mass carrier in at least one deflection plane so that the radial position of the deflection mass with respect to said axis changes, at least part of said vibration damping device being integrated into said secondary drive system, and
• a pair of cover elements assembled to respective said sides of said deflection mass carrier and covering said at least one free space, said cover elements forming the belt guide sections of the pulley.