| 摘要 |
PROBLEM TO BE SOLVED: To improve performance of an intake manifold for improving engine operation. SOLUTION: The intake manifold (3) on which a blow-by gas passage (36) is attached, includes a bent intake air common passage (31) connected to a throttle chamber, an intake air collecting chamber (32) disposed at an upper part of a V-type engine and connected to the intake air common passage (31), a plurality of branch pipes (33) supplying air sucked from lower inlets (34a, 34b) opening in the intake air collecting chamber to engine cylinders respectively, and a connection part (37) between the blow-by gas passage and each branch pipe. When the manifold is combined with the V-type engine, height of an end part (39) at a throttle chamber side of the intake air common passage is set higher than the highest position of a connection part so as to keep at least one connection part (37) in a projection surface of the intake air common passage in a view from a vehicle front side. COPYRIGHT: (C)2010,JPO&INPIT
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