CPC F01N 1/023 (2013.01) [F01N 1/02 (2013.01); F01N 1/06 (2013.01); F01N 1/082 (2013.01); F01N 1/163 (2013.01); G10K 11/04 (2013.01); F01N 2560/06 (2013.01); G10K 11/161 (2013.01)] | 9 Claims |
1. A method for attenuating drone exhibited by an exhaust system of an internal combustion engine, comprising:
providing a hollow canister having a length and a diameter suitable for use in a drone elimination muffler;
selecting a tuned port having a length and diameter suitable for operating in concert with the hollow canister to attenuate exhaust drone, wherein selecting the tuned port includes clamping a damper clamped within a joint between the hollow canister and the exhaust system, wherein the damper comprises a perforated stainless steel sheet;
a thermocouple in contact with a tuned port to detect and monitor temperature of the tuned port; and
connecting a first end of the tuned port to the canister and connecting a second end of the tuned port to the exhaust system, such that the canister and the tuned port substantially attenuate exhaust drone at one or more frequencies of engine operation, wherein the second end is connected to the exhaust system at an outlet of a second muffler.
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