| 摘要 |
PROBLEM TO BE SOLVED: To provide a blow-by gas recirculation device for an internal combustion engine to surely prevent an oil component or the like contained in blow-by gas from entering into an intake system and to reduce accumulation of deposits in the intake system. SOLUTION: The blow-by gas recirculation device comprises: a recirculation passage 42 for performing recirculation of the blow-by gas into the intake system; a gas-liquid separator 44 disposed in the recirculation passage 42 to separate and store a liquid component in the blow-by gas; a liquid return passage 48 connected to the gas-liquid separator 44 to return the stored liquid component to a liquid reservoir 3c; and an opening/closing means 50 interposed between the gas-liquid separator 44 and the liquid return passage 48 to make the liquid return passage 48 communicate and to cut off the liquid return passage. The opening/closing means 50 make the liquid return passage communicate when internal pressure of the intake system exceeds a predetermined value, and cuts off the liquid return passage when the internal pressure of the intake system is not more than the predetermined value. COPYRIGHT: (C)2004,JPO
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