| 摘要 |
A scavenging port 24 is composed of a main port portion 28 directly ranging to a scavenging passage 22 and a port extension 30 extending from the main port portion 28 in the lateral direction. The port extension 30 extends to the opposite side of an exhaust port 10. A corner portion 40, where the port extension 30 and the scavenging passage 22 are in contact with each other, is composed of an inclined surface that gradually approaches a cylinder chamber 18 toward a gas mixture port 8. |
