| 摘要 |
<p>A muffler (1) is described for muffling both positive power and compression brake type engine retarders. The muffler includes an outer shell (3) defining an internal volume (45). A first, inner, perforated wall (57) is spaced from the outer shell and defines a first, annular, volume (55) therebetween. A first volume of packing material (59) is positioned within the annular volume. An inlet tube (6) is oriented within the internal volume. In certain embodiments, the inner perforated wall circumscribes at least a portion of the inlet tube, and extends a distance of at least 25 % of the axial length of the outer wall. Both single and dual muffler systems are described. Methods of use and operation are also provided.</p> |
