Patent ID: 6497204
Filing Date: 2002-12-24
Classification: F02B,F02F,F02M

Abstract:
A stratified scavenging two-stroke cycle engine comprising:an exhaust port (22) and a scavenging port (21) which are connected to a cylinder chamber (10) of the engine; a leading air suction port (24) not connected to said cylinder chamber and a crank chamber (11) during all of strokes of a piston (4); an air-fuel mixture suction port (23) connected to said crank chamber; a scavenging flow passage (20) connecting between said scavenging port and said crank chamber; a piston groove (25) connecting between said leading air suction port and said scavenging port and not connecting between said air-fuel mixture suction port and said scavenging port at a time of a suction stroke, and provided in an outer peripheral portion of said piston; and said leading air suction port, said air-fuel mixture suction port, and said scavenging port are opened and closed due to a vertical motion of said piston; wherein said leading air suction port (24) is positioned in a same side as said exhaust port (22).