| 摘要 |
PROBLEM TO BE SOLVED: To ensure sufficient pressure strength by forming a bending part for connecting a branch part connected to a cylinder and a collector part connected to a throttle to each other by a deformable bellows, in a resin made intake manifold for leading intake of a vehicular engine. SOLUTION: In an intake manifold 1, air whose flow-in rate is regulated by a throttle chamber is led from a collector part 4 to a cylinder through a branch part 3. In this case, the branch part 3 and the collector part 4 are connected to each other through a bellows 11, those connecting parts are mutually and forcibly stuck by means of fusion and the like, and the branch part 3 and a rubber made connecting parts 9 are fastened by a fastening parts 10. Accordingly, sufficient air-tightness is ensured at the time of negative pressure, the bellows 11 part is deformed at the time of back fire, the branch part 3 and the rubber made connecting parts 9 are removed. It is thus possible to prevent large pressure from applying on the intake manifold 1, and it is also possible to avoid breakage of the intake manifold 1.
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