| 摘要 |
An intake manifold ( 1 ) of a multi-cylinder internal combustion engine comprises a single pipe portion ( 4 ), a collector ( 5 ) connected to the pipe portion ( 4 ), and a plurality of branch pipes ( 6 ) branching from the collector ( 5 ) to each cylinder. The pipe portion ( 4 ) and the collector ( 5 ) divided into a plurality of spaces ( 1 a , 1 b) by a partitioning member ( 12 ). Blow-by gas is equally distributed to each cylinder using a simple structure comprising a discharge vent ( 3 ) for blow-by gas in the pipe portion ( 4 ) extending over the partitioning member ( 12 ) and being equal to the two spaces ( 1 a , 1 b). It is preferred that a notch ( 8 ) is formed facing the discharge vent ( 3 ) on the partitioning member ( 12 ).
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