PISTON MACHINE Russian patent published in 2002 - IPC

FIELD: mechanical engineering; engines. SUBSTANCE: machine has cylinder-piston group with dynamic compression amplifier installed in each piston of group consisting of stop member, two inserts arranged under upper compression ring symmetrically relative to lock axis. Cylindrical recess is made at least in one of compression rings at a distance of 1-6 mm from its end section to accommodate end section of stop member. Cavities for accumulating lubricant for lubricating the inserts are made on cylinder face opposite to inserts when piston is in BDC. EFFECT: improved reliability and increased service life. 2 cl, 2 dwg