| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an acoustic countermeasure which reduces frequency to be an object of noise in an air intake tract. <P>SOLUTION: An air pillow system for an air intake tract includes a plurality of ribs arranged in a distally spaced arrangement, fixed to an inner wall of the air intake tract, and inwardly extending from the wall. The ribs define a plurality of peripherally closed air pillow pockets. Each air pillow pocket has an open end opening towards an airflow stream to be guided in the air intake tract. Each rib has an inwardly extending length selected to correlate with a boundary of a desired airflow glide path of the airflow stream. An air mass in the air pillow pocket guides the airflow stream along the desired airflow glide path. <P>COPYRIGHT: (C)2011,JPO&INPIT |
