| 摘要 |
To provide a two cycle combustion engine provided with scavenging passages of a structure, which is effective to minimize a deposit of fuel contained in an air/fuel mixture and allows the mixture to be injected into a combustion chamber so as to avoid the blow-off of the air/fuel mixture, the engine includes a cylinder block 1 having a cylinder bore 1 a, a scavenging-passage-defining wall member 34 made separate from the cylinder block 1 and fitted to the cylinder block 1 . A scavenge regulating segment 37, 38 secured to the scavenging-passage-defining wall member 34 is spaced from an outer diametric surface 24 C, 27 C of the scavenging passage 24, 27 and two side surfaces 24 A, 24 B or 27 A, 27 B of the scavenging passage 24, 27 that are opposed to each other in a direction circumferentially of the cylinder bore 1 a and occupies a circumferential center portion of the scavenging passage 24, 27.
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