NOVELTY - The drive has a waste heat utilization unit (2) provided with an expansion machine (10) e.g. steam turbine, which is arranged in a closed vapor circuit (3) in which working medium is vaporized through dissipated heat resulting during operation of an internal combustion engine (1) i.e. reciprocating piston engine. The expansion machine is rotatably driven through rotatable drivable components. The expansion machine and the drivable components are drivably, permanently, switchably or time controllably connected with each other with respect to operation of the drivable components.    USE - Vehicle drive.    ADVANTAGE - The expansion machine and the drivable components are drivably, permanently, switchably or time controllably connected with each other with respect to operation of the drivable components, so that the mechanical energy produced by the waste heat utilization unit is efficiently conveyed into the powertrain. The expansion machine and the component are integrated in a common housing, so that installation space and cost of the drive can be reduced. The drive improves drive-disconnection between the expansion machine and a drive shaft of the drivable component. The operating points of the vapor circuit of the waste heat utilization unit can be controlled in order to increase the efficiency of the energy transformation in the expansion machine.    DETAILED DESCRIPTION - The drivable component is designed as a climate compressor (14) of an air conditioning apparatus, a pressurized air compressor (15), a fan (16) for cooling an engine, a traction drive (18) of the combustion engine and a generator (17) for production of electrical power.    DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view of an internal combustion engine with a waste heat recovery unit, multiple auxiliary units and an expansion machine arranged at a climate compressor.    Internal combustion engine (1)    Waste heat utilization unit (2)    Closed vapor circuit (3)    Expansion machine (10)    Climate compressor (14)    Pressurized air compressor (15)    Fan (16)    Generator (17)    Traction drive (18)