| 摘要 |
PROBLEM TO BE SOLVED: To provide a blow-by gas recirculating apparatus for an engine in which the ventilation efficiency of a crankcase can be enhanced. SOLUTION: A fresh air introducing chamber 10 is provided at a position which is remote from a head cover 2, an upstream intake passage 7 of a throttle valve 5 is communicated with the fresh air introducing chamber 10, and the fresh air introducing chamber 10 is communicated with a crankcase 9 through a crankcase throttle hole 11 which is opened in the crankcase 9, whereby fresh air 12 in the upstream intake passage 7 of the throttle valve 5 is introduced into the crankcase 9 sequentially through a fresh air introducing passage 8, the fresh air introducing chamber 10, and the throttle hole 11, without being short-circuited to a PCV valve 3, and, in a reverse flow from the crankcase 9 to the upstream intake passage 7 of the throttle valve 5, gas in the crankcase 9 reversely flows into the upstream intake passage 7 of the throttle valve 5 sequentially through the throttle hole 11, the fresh air introducing chamber 10, and the fresh air introducing passage 8. COPYRIGHT: (C)2011,JPO&INPIT |
