FIELD: engine engineering. SUBSTANCE: combustion chamber of the engine is made up as hollows 6 and 7 of curved profile on the body of rotor 3 and on the inner side of the sleeve. Separators 14 of working spaces is the cylindrical portion of rotor 3. The cross-section of hollow 6 on the body of the rotor increases in the direction of working surface of piston 4. Hollow 7 on the sleeve is provided from the head of the combustion chamber in the direction of rotation of rotor 3. In addition rotor 3 has two opposite hollows 6 with an arc of 85-88°. The arc of hollow 7 is 85-88°. Opposite to hollow 7 is outlet valve 12. EFFECT: enhanced efficiency. 4 cl, 2 dwg
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