| 摘要 |
PROBLEM TO BE SOLVED: To provide a laminar scavenging 2-stroke engine capable of securing much air for prior scavenging even with a compact constitution.SOLUTION: An intake passage 31, an exhaust passage 32, and an air passage 35 are formed on a cylinder member. A first scavenging passage 33 has a cylinder member side passage 333 and a crank case side passage 334, and a second scavenging passage 34 has a cylinder member side passage 343 and a crank case side passage 344. The cylinder member side passage 333 of the first scavenging passage 33 and the cylinder member side passage 343 of the second scavenging passage 34 are communicated with each other by a communication part 36, so as to connect the air passage 35 to the cylinder member side passage 333 of the first scavenging passage 33. The air for prior scavenging is introduced to the cylinder member side passage 333 of the first scavenging passage 33 from the air passage 35 via a check valve 37, and one part of the introduced air flows into the second scavenging passage 34 via the communication part 26. |
