STRATIFIED SCAVENGING 2-CYCLE ENGINE

摘要

PROBLEM TO BE SOLVED: To provide a stratified scavenging 2-cycle engine capable of supplying air to a combustion chamber. SOLUTION: The stratified scavenging 2-cycle engine is furnished with a cylinder block having bores each provided with one or more scavenging ports and air ports. The bores extend to a crank case. The piston of the engine separates the combustion chamber in the cylinder bore from the crank area and is arranged as fitted in the bore slidably between the first position closest to the crank area and the second position. The air ports and the piston are arranged so that the air flows from the air ports into the combustion chamber when the piston lies in the first position. As one example, the scavenging ports and air ports have edges opened and shutting selectively in compliance with sliding of the piston, and each air port has a top in a position farthest from the crank area, and the top of the air port is shaped so that only part opens when the piston lies in the first position. COPYRIGHT: (C)2005,JPO&NCIPI