| 摘要 |
<P>PROBLEM TO BE SOLVED: To suppress the generation of sound radiation without misappropriating an accessory as the mass of a dynamic damper nor equipped with a dedicated dynamic damper in a resin-made intake manifold 1. <P>SOLUTION: The intake manifold 1 has a structure that at least combines a first member 11 coupled with an internal combustion engine and a second member 12 bonded to the first member 11. An elastic body 3 is intermediated in the connection part of both the members 11 and 12, and the dynamic damper is composed using the elastic body 3 as a spring and the second member 12 as a mass. A resonance frequency of the dynamic damper is adapted for that of the intake manifold 1. <P>COPYRIGHT: (C)2012,JPO&INPIT |
