CPC F01N 1/083 (2013.01) [F01N 1/003 (2013.01); F01N 1/006 (2013.01); F01N 1/02 (2013.01); F01N 1/023 (2013.01); G10K 11/161 (2013.01); G10K 11/172 (2013.01); F01N 2210/04 (2013.01); F01N 2470/14 (2013.01); F01N 2470/18 (2013.01); F01N 2490/10 (2013.01); F01N 2490/15 (2013.01)] | 11 Claims |
1. A muffler for receiving exhaust gas from a combustion engine, the muffler comprising:
a shell;
first and second inlet pipes each having outlets providing exhaust gas to a mixing chamber within the shell;
a first chamber and a second chamber positioned within the shell; and
a pair of communication pipes each including an inlet receiving exhaust gas from the mixing chamber, each communication pipe including an outlet providing exhaust to the second chamber, each of the communication pipes further including a Helmholtz opening positioned downstream of the mixing chamber, the Helmholtz openings being open to the first chamber.
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