CPC F01N 1/023 (2013.01) [F01N 1/04 (2013.01); F01N 3/2803 (2013.01); F01N 3/2853 (2013.01); G10K 11/162 (2013.01); G10K 11/172 (2013.01); F01N 2230/04 (2013.01)] | 17 Claims |
1. An exhaust device comprising:
an outer shell;
an inlet extending from the outer shell and receiving exhaust gas;
an outlet extending from the outer shell;
an inner shell received within the outer shell, the inner shell defining an inner volume, a plurality of first circumferential openings therethrough fluidly communicating the inlet with the inner volume, and a plurality of second circumferential openings therethrough fluidly communicating the outlet with the inner volume;
a pair of partition walls disposed between the inner shell and the outer shell, wherein the pair of partition walls, the inner shell and the outer shell define a Helmholtz chamber therebetween, wherein the pair of partition walls seal the Helmholtz chamber from the inlet and the outlet; and
a Helmholtz neck comprising a cylindrical wall defining a tube disposed on the inner shell, the Helmholtz neck comprising an elbow having a first end extending axially within the inner shell and a second end extending radially toward the Helmholtz chamber, the Helmholtz neck fluidly communicating the inner volume with the Helmholtz chamber;
wherein the inner shell is radially offset from the outer shell by an annular gap.
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