Marine exhaust silencer

Details Marine exhaust silencer Marine exhaust silencer

1976-07-15

1978-07-18

Hix, L. T.

Acoustics

Sound-modifying means

Muffler, fluid conducting type

181263, 181264, 181281, F01N 304

Patent

active

041009940

ABSTRACT:
A silencer quiets the exhaust output from a marine engine by injecting a spray of cooling water into the exhaust passageway to mix with and cool the exhaust gases before output from the passageway. The exhaust passageway preferably enlarges substantially in cross-sectional area in the region where the mixing occurs between the injected water and the exhaust gases for enhancing the cooling effect. An inlet scoop receives water as the boat moves forward, and the water is forced through a line and into the exhaust passageway in a way that breaks the water into drops for contacting and cooling the exhaust gases. A mute that is preferably conical in shape and centered in the exhaust outlet also cooperates to reduce the exhaust noise.

REFERENCES:
patent: 2484816 (1949-10-01), Culbert
patent: 2485555 (1949-10-01), Bester
patent: 3198162 (1965-08-01), Larsen

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