Patent ID: 7028473

Claim:
A hot-gas engine comprising at least one cylinder and a working piston moving to and fro which together with a cylinder cover delimits a cylinder space designed to accommodate a working medium, comprising a displacement device which divides the cylinder space into a first and a second working space, comprising a heating device for heating up the working medium contained in the first working space, and comprising a cooling device for cooling the heated working medium, wherein the working spaces are connected so as to be communicating by way of a regenerator, wherein the first working space is arranged between the working piston and the displacement device, in that the heating device comprises at least one heating organ that faces in the direction of the first working space, and the cooling device comprises an injection device for feeding a liquefied working medium, which is used as a coolant, into the first working space and an outlet arrangement for leading away the excess working medium from the first working space.