Patent ID: 8261553

Claim:
A drive train comprising an engine for supplying drive power to the drive train in order to drive driving wheels or a work machine via a drive connection; a transmission is provided for speed and/or torque conversion in the drive connection between the engine and the driving wheels or the work machine and comprises a primary side with a transmission input and a secondary side with a transmission output, with the engine supplying driving power to the transmission input and the driving wheels or the work machine is driven via the transmission output; an expander which is driven with a fluid or steam as a working medium and by means of which drive power can be supplied additionally to the drive train for driving the driving wheels or the work machine, and/or which drives an additional unit; wherein the expander is integrated in the transmission on its secondary side; wherein the transmission comprises a heat exchanger by means of which a transmission oil is cooled for lubricating the transmission and/or for actuating clutches or brakes within the transmission, with the working medium of the expander being guided in such a way through said heat exchanger that heat is dissipated from the working medium in the same in order to condense the working medium partly or in full, or to transfer heat in the heat exchanger to the working medium of the expander in order to heat the same.