ROTARY SLEEVE VALVE-CARRYING INTERNAL COMBUSTION ENGINE

摘要

This invention relates to an internal combustion engine having a rotary sleeve valve mechanism provided with a sleeve valve having an opening in the outer circumferential wall thereof for sucking a fuel and discharging an exhaust gas. According to this invention, a rotating sleeve valve is employed so as to improve the suction and exhaust efficiencies and simplify the valve mechanism. A cylindrical rotary cylinder valve (3) supported rotatably in an engine block (1) is provided. This cylinder valve (3) communicates with a suction port (10) or an exhaust port (15) during a suction stroke or an exhaustion stroke via an opening (5) provided in the outer circumferential wall of the cylinder valve (3). A seal ring (40) is provided in the outer circumferential portion of this opening (5) so as to gas-seal the clearance between the outer circumferential surface of the cylinder valve (3) and the inner circumferential surface (7) of the engine block (1). A gear (4) provided at one end portion of the rotary cylinder valve (3) and a crank gear (26) mounted on a crankshaft (20) are meshed with each other. The rotation of the crankshaft (20) and that of the rotary cylinder valve (3) are interlocked to synchronously carry out the suction and exhaust operations.