Patent ID: 8359860

Claim:
A drive train of a motor vehicle, said drive train comprising: a vehicle drive shaft; a vehicle drive engine configured for driving the motor vehicle via said vehicle drive shaft driven by said vehicle drive engine; a compressor configured for being driven one of periodically and permanently and for compressing air for a compressed-air system of the motor vehicle; a plurality of compressed-air brakes of said compressed-air system, said plurality of compressed-air brakes being supplied with compressed air compressed by said compressor; at least one drive unit formed as a steam-driven expansion machine, said compressor being associated with at least one said drive unit formed as said steam-driven expansion machine by which said compressor is configured for being driven, said compressor being one of configured for being driven by and driven by way of at least one of said vehicle drive engine and an additional drive, said steam-driven expansion machine being associated with said compressor as a second drive unit with which said compressor is configured for being additionally driven.