| 摘要 |
PROBLEM TO BE SOLVED: To provide an air intake duct capable of exhibiting a silencing effect without increasing an outside diameter of a duct main body.SOLUTION: In an air intake duct 11 connected to an intake system of an engine, a straightening vane 25 for straightening intake air is arranged in an air passage 23 within a duct main body 12 to extend in an airflow direction. A porous plate constitutes the straightening vane 25 and pores of the straightening vane 25 damp sound waves. |
