| 摘要 |
PROBLEM TO BE SOLVED: To provide a technique to suppress dew condensation caused by staying blowby gas in an intake passage when an internal combustion engine is stopped, in the internal combustion engine provided with a blowby gas treatment device recirculating blowby gas in a crankcase to the intake passage. SOLUTION: An operating valve 18 for opening/closing a PCV (Positive Crankcase Ventilation) passage 17 is provided in the vicinity of the connection part with the intake passage 8 of the PCV passage 17 for communicating the crankcase with the intake passage 8, and the operating valve 18 is closed when the internal combustion engine 1 is stopped. Thereby, dew condensation is suppressed which is caused by staying high temperature blowby gas in the low temperature intake passage 8 with an air supply flow stopped after the internal combustion engine 1 is stopped. COPYRIGHT: (C)2008,JPO&INPIT
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