FIELD: engine engineering. SUBSTANCE: cylinder 1 provided with a direct flow blowing is secured to a housing. Piston 4 reciprocates inside cylinder 1. The piston is coupled with a crankshaft through main connecting rod 5 and additional connecting rod. The main and additional connecting rods are coupled with rocker 7 mounted inside the housing for permitting rotation about its axis. When rocker 7 is in the and position and piston 4 is at the top dead center, axial line of main connecting rod 5 is an expansion of the axial line of rod 6 of rocker 7. At the other end position, rocker 7 stops when piston 4 have passed the bottom dead center and is moving to the top dead center so as the blowing ports of cylinder is not overlapped. Piston 4 is in the bottom dead center when axial line of main connecting rod 5 passes through the center of rocking of rocker 7 and is coincident with axial line of rod 6 of racker 7. The cyclic duration of blowing increases owing to the rocker rotates by a great angle forward and back at opened blowing ports. EFFECT: enhanced efficiency. 3 dwg
