Two-stroke cycle engine

摘要

This invention concerns a two-stroke cycle engine, more specially it concerns a two-stroke cycle engine using a preceding air-layer for scavenging. It has a scavenger passage (109d) connected to a branching scavenger passage (109d) opened to said scavenging port (9a). The blow-up angle of the scavenger passage (109d) varies along the circumferential direction of the cylinder (2).