Compact exhaust silencer for diesel locomotives

Details Compact exhaust silencer for diesel locomotives Compact exhaust silencer for diesel locomotives

F - Mech Eng,Light,Heat,Weapons

01

N

172/30

F01N 1/02 (2006.01) F02B 3/06 (2006.01)

Patent

CA 1138780

C-3166 D-3,485 Abstract of the Disclosure A compact exhaust silencer especially for use in diesel locomotives having a single exhaust outlet located in relatively close proximity to the roof of the engine hood. The silencer includes an offset duct having dual oppositely curved ninety degree bends, leading to a roof outlet opening and providing broadband high frequency sound level reduction, combined with a compact Helmholtz cavity-type resonator. The resonator consists of a chamber mounted near the first bend in the direction opposite the main duct offset and a connector tube extending from the side of the duct downwardly into the chamber and tuned with the cavity to the sound frequency at which maximum silencing is desired, preferably the predominant firing frequency in the engine noise spectrum at full speed and load.

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