FIELD: mechanical engineering. SUBSTANCE: proposed internal combustion engine operating according to four-stroke cycle (Otto-Diesel cycle) has at least one cylinder, one piston, intake and exhaust channels with valves, additional outlet hole in lower part of cylinder provided with valve with drive. Size of hole section is defined from top by exhaust advance angle of said engine, and from bottom, by bottom dead center. EFFECT: increased power output and efficiency of engine. 2 cl, 1 dwg
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