| 摘要 |
<P>PROBLEM TO BE SOLVED: To extend filter life and reduce filter maintenance frequency or the like, by suppressing or reducing mixed fuel that back flows from a carburetor. <P>SOLUTION: An air cleaner comprises: a fuel storage 30 formed near, and so as to surround, a cleaner outlet 20 provided in a cleaner bottom wall 15A located toward a carburetor, the fuel storage being adapted to store mixed fuel that back flows from the carburetor; a back flow guide member 19 that guides the mixed fuel that back flows into the air cleaner via the cleaner outlet 20 not toward a filter but toward the fuel storage 30; and return flow channels 41, 42, 43, 44 each of which comprises one end that is in communication with the fuel storage 30 and another end that is in communication with the cleaner outlet 20 so as to return the fuel stored in the fuel storage 30 back toward the carburetor utilizing intake negative pressure. The plurality of return flow channels 41, 42, 43, 44 are formed in a radial manner about the cleaner outlet 20, wherein upper end surface has a sloped surface that slopes downward toward the cleaner outlet 20. <P>COPYRIGHT: (C)2012,JPO&INPIT |
