Rotary piston machine, especially rotary engine

A power generating unit comprising a rotary piston machine, wherein the rotary machine comprises:

• a housing;
• a piston chamber that is defined in the housing by a first sidewall, a second sidewall and a peripheral wall interconnecting the first and second sidewalls;
• a rotary piston that is rotatably arranged in the piston chamber and has a first face and a second face, wherein the first face of the rotary piston faces an interior of the first sidewall of the piston chamber and the second face of the rotary piston faces an interior of the second sidewall of the piston chamber;
• at least two working zones formed between a peripheral surface of the rotary piston and the peripheral wall of the piston chamber;
• at least one first lateral seal that is provided on the first and second faces of the rotary piston in order to seal intermediate spaces between the first and the second sidewall of the piston chamber and the first and second faces of the rotary piston relative to the working zones;
• a central bore;
• at least one second lateral seal that is provided on the first and the second face of the rotary piston in order to seal the respective intermediate spaces between the first and second sidewalls of the piston chamber and the first and second faces of the rotary piston relative to the central bore;
• at least one ventilation bore provided only in one of the first and second sidewalls of the piston chamber and connected to at least one ventilation channel in the housing for discharging gases from the housing, wherein the at least one ventilation bore is arranged at a location that radially lies within the at least one first lateral seal and outside the at least one second lateral seal;
• wherein the at least one second lateral seal is arranged radially within the at least one first lateral seal and wherein the at least one ventilation bore lies radially outside the at least one second lateral seal;
• a rotatably supported shaft, on which the rotary piston revolves, provided in the housing and coupled to an electromechanical energy converter,
• wherein the at least one ventilation bore lies within an angular segment;
• and
• wherein no other bore is provided in the first or second sidewall.