TWO-STROKE INTERNAL COMBUSTION ENGINE Russian patent published in 1998 - IPC

FIELD: mechanical engineering; internal combustion engines. SUBSTANCE: two-stroke internal combustion engines has two working cylinders 2 and one compression cylinder 3, working pistons 8 and compression piston 9 installed in cylinders. Engine has holder 14 on inner surface of which races are made to permit shifting of rollers 12 of rod 11 onto races and, as a result, change of compression ratio in cylinders. Profile of races corresponds to odd number of dead points. Holder 14 is installed for movement along cylinder block axis through value equal to summary width of races. EFFECT: enlarged operating capabilities of engine due to provision of possibility of changing compression ratio and number of working strokes per revolution of holder. 3 dwg