Patent ID: 6257179
Filing Date: 2001-07-10
Classification: F02B,F02D,F02F,F02M,F05C,Y02T

Abstract:
A two-stroke cycle engine using a preceding air-layer for scavenging, comprising:an exhaust port on the side of the cylinder;a scavenging port on the side of the cylinder;an intake port on the side of the cylinder fuel passage, which supplies fuel-air mixture through a mixture control valve on the carburetor to the crank chamber during the time of the elevation of the piston;a scavenger passage opened to said scavenging port; an air supply port, which supplies scavenging air from the air cleaner to said scavenger passage;a cam which is interlocked with said mixture control valve;a cam follower which engages with said cam; andan air control valve in the upstream of an air passage which controls the diameter of said air passage, and said air control valve being operated by said cam and said cam follower in such a way as to supply a quantity of scavenging air proportional to the quantity of fuel-air mixture determined by the opening of said cam and the mixture control valve to control the fuel-air mixture.