INTERNAL COMBUSTION ENGINE Russian patent published in 1995 - IPC

FIELD: engine engineering. SUBSTANCE: rod of each piston is provided with additional roller interacting with additional cam made on outer surface of the power take-off shaft. Curved parts are made up as two one-period sinusoids of different length. The amplitude of one sinusoid is at least three times grater than the amplitude of the other sinusoid. The straight part is in length equal to the half period of the lesser sinusoid. The valve gearing is cam type and constructed as a washer fixed to the shaft face and provided with auxiliary cams made up as arc-like projections arranged over periphery. EFFECT: enhanced efficiency. 2 cl, 8 dwg