| 摘要 |
<p>The control shutter, e.g. for an exhaust pipe with a branch connected to a section with a different noise absorption or catalytic capacity, consists of a disc (4) which rotates inside the pipe (12) on two pivots (16) set in bearings. Each bearing has an annular support (20) which forms part of the pipe and a cushion (22) between it and the pivot, shaped so that the they are pulled together by the disc. Each cushion is made from a metal mesh loaded with a material having a low friction coefficient, e.g. graphite, and the position of the shutter inside the pipe is controlled by an outer bracket (24) attached to the ends of the two pivots.</p> |
