| 摘要 |
PURPOSE:To give the advantages in terms of space and effectively cool a muffler by feeding forced cooling air for an engine around the muffler via a guide. CONSTITUTION:Cooling air flows around a cylinder block or so of an engine to cool it, is forcibly fed rearward from the outlet 17b of a guide member 17, guided rearward through a passage 23 which is formed around the periphery of a muffler 20 and then discharged to the rear side. The muffler 20 is forced to be cooled by the lengthwise flow of the forced cooling air inside the passage 23. Since separated from the ambient air by the longitudinal piece 21a and the lateral piece 21b of a partition wall 21, the cooling air will not contact an air cleaner, a carburetor and so on to efficiently cool the muffler 20 only while hot air by the muffler 20 will not contact them and its radiant heat is cut off by the partition wall 21. |
