via the conduit 3a to the compressor 5 air is delivered to the compressor 5 by means of an air intake conduit 6 and exhaust gas air mixture 7 is compressed in the compressor 5 and burned in a combustion chamber or compartment 8 the exhaust gas air mixture is led via a conduit 508 from the compressor 5 to the combustion chamber or compartment 8 exhaust gases 9 of the combustion chamber 8 are delivered to a power turbine 10 and ejected via the exhaust line or conduit 11 conduit 11 is connected to a surface condenser 13 the power turbine 10 is connected through the agency of a conventional change over or drive train gearing system 12 with the drive wheels of the motor or power vehicle the piston engine device can be an otto cycle engine or a diesel cycle engine such can be constructed as a two stroke cycle or four stroke cycle engine also it can be a rotary piston engine which would be particularly suitable with respect to a rotationally movable or turbine compressor device respectively especially as its drive mechanism the compressor can be a single or double acting piston compressor as shown in fig6 as compressor 501 it features the intake 3a for the exhaust gases of the piston engine 1 as well as an air the air intake conduit 6 for fresh air the mixture consisting of exhaust gases and fresh air is fed into the conduit 508 leading to the combustion chamber 8 in this case such could.