| 摘要 |
An air-cooled internal combustion engine (10) having a rotating screen (16) and a blower housing (12) surrounding the screen. A ring (40) is attached to the housing and positioned circumjacent the screen to define a precisely gauged radial clearance gap between the ring and the rotating screen. The ring provides a tortuous entry path for foreign matter entering through the air intake port between the ring and the screen. The ring includes a downwardly extending groove (56) into which extends an upwardly turned lip (34) of the rotating screen to form the tortuous path for foreign matter entering through the clearance gap between the inner periphery (44) of the ring and the outer periphery (46) of the main portion (30) of the screen. Large debris and foreign matter entering through the tortuous path is chopped up into small pieces, which may then pass through the cooling fins. <IMAGE> |
