| 摘要 |
PROBLEM TO BE SOLVED: To provide two cycle engine capable of increasing output and effectively reducing total hydrocarbon composition in exhaust gas without large scale structural design change. SOLUTION: In this two cycle engine, three pairs of a first, a second and a third scavenging ports blowing up scavenging air toward a wall surface 3a in an opposite side of an exhaust port 1 are provided on a cylinder inner wall 3 setting an axis of symmetry O as an axis of the exhaust port 1 and an axis of a cylinder 2. The three pairs of the first, the second and the third scavenging ports 4a, 4b, 4c are provided in such a manner that directions of axes 4ao, 4bo, 4co of each pair of the scavenging ports are different each other to make scavenging air flow from each pair of the scavenging ports impinge each other and promote atomization of fuel particles. COPYRIGHT: (C)2005,JPO&NCIPI
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