FIELD: mechanical engineering; internal combustion engines.
SUBSTANCE: proposed engine has housing, two ring-shaped cylinders arranged and equally spaced over circle, and ring-shaped pistons. Ring-shaped pistons are rigidly connected with ends of ring-shaped rods provided with guides. Slots made on working surfaces of rods and pistons pointed inside circle are designed for gear train. Pistons are installed for continuous movement with rods over circle in one direction with transmission of motion through system of gears.
EFFECT: increased efficiency of engine.
