FIELD: mechanical engineering; internal combustion engines. SUBSTANCE: engine has first and second cylinders, pistons, intake and exhaust means, common combustion chamber second volume of combustion chamber, restricting devices, fuel supply source, driving devices, swirler with obstacle between cylinders provided with hole passing in direction of center of bottom when second piston is in top dead center. Displacement of first cylinder is greater than of second cylinder. Second piston has blade on bottom. EFFECT: improved conditions of combustion in piston internal combustion engines. 8 cl, 8 dwg
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