| 摘要 |
PROBLEM TO BE SOLVED: To provide a structure that is surely capable of preventing freezing of a PCV (positive crankcase ventilation) passage without installing extra piping, and to provide an intake manifold provided with the structure.SOLUTION: A freezing prevention structure for a PCV passage 70 includes: a PCV passage 70 that returns blow-by gas mainly composed of unburned gas that has leaked into an interior of an engine, to an intake port; an EGR passage 60 that returns an exhaust gas exhausted from the engine to the intake port; and a heating part that is a shared portion between the PCV outer wall of the PCV passage 70 and an EGR outer wall of the EGR passage 60. An intake manifold 1 is provided with this freezing prevention structure. |
