| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a stratified scavenging two-stroke engine which is simply structured to improve engine output and purify exhaust gas. <P>SOLUTION: The stratified scavenging two-stroke engine 1 has a scavenging port 71 opening into a cylinder 2 for filling leading air through the side of the scavenging port 71 into a scavenging passage 7 connecting a combustion chamber R1 with a crank chamber R2, and includes a piston 5 inserted into the cylinder 2 in a reciprocatable manner, and having a recess 51 in the outer peripheral face opposed to the inner peripheral face of the cylinder, and an air passage 8 having an air port 81 provided in the inner peripheral face of the cylinder for supplying the leading air, and communicated with the scavenging passage 7 via the recess 51. The air passage 8 and the scavenging passage 7 are intercommunicated/isolated by the piston 5 in accordance with the reciprocatory movement of the piston 5, and the air port 81 partly opens to the combustion chamber R1 when the piston 5 is at a bottom dead center position. <P>COPYRIGHT: (C)2012,JPO&INPIT |
