Rotary piston engine of trochoidal design - has pressure chamber to maintain pressure and prevent lubricant or coolant escape

摘要

An annular chamber (15) formed between the piston (6) and the side part (3) of the housing is connected with the working chamber (B) in the expansion cycle by a line (23) to which a pressure retention chamber (29) is connected. A non-return valve (30) in the line prevents return flow from the latter chamber (29) or from the annular chamber (15) to the working chamber (B). The line leaves the chamber at a point positioned in a region before the outlet (10) between the long (25) and short (26) axes of the trochoid in the rotational direction (D) of the piston (6).