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

FIELD: engine manufacture. SUBSTANCE: engine has pistons installed in master cylinder and in pump cylinder which are parallel-mounted and have admission and exhaust ports; pump cylinder operates in phase opposition to master cylinder; both cylinders also have working spaces formed above respective pistons; engine is multirow (double-row) machine with cylinders mounted one on top of other; pistons of cylinders in preceding row are coupled with those of next row; master cylinder is twin structure with two pistons and common combustion chamber providing communication between its two spaces. Piston crank in working space of master cylinder with exhaust port is mounted at angle of deflection equal to shaft turn from piston crank in working space of master cylinder with exhaust port towards shaft rotation for advanced opening and closing of exhaust port in master cylinder relative to admission port. EFFECT: improved economic efficiency and specific power of engine. 2 cl, 7 dwg