INTERNAL COMBUSTION ENGINE OPERATION METHOD Russian patent published in 1998 - IPC

FIELD: mechanical engineering; internal combustion engines with stepped piston. SUBSTANCE: method of operation of internal combustion engine comes to filling cylinder working space with fresh charge, compressing fresh charge by piston in its movement to top dead center, igniting and combustion fuel mixture and exhausting combustion products whose expanding energy is converted into mechanical work partially used for preliminary compression of portions of fresh charge by piston at its movement and subsequent delivery of these portions into working space of cylinder. Portions of preliminarily compressed fresh charge are accumulated in common chamber and then are delivered into working space of cylinder. First portion of preliminarily compressed fresh charge is fed into accumulating chamber with piston moving to bottom dead center, and second portion, at its return movement. Portions of compressed fresh charge from common chamber are delivered into working space until pressures in working space and accumulating chambers are levelled up. EFFECT: enlarged operating capabilities. 3 cl, 4 dwg