Silencing system for exhaust gases from internal combustion engi

Details Silencing system for exhaust gases from internal combustion engi Silencing system for exhaust gases from internal combustion engi

1985-09-10

1986-10-14

Fuller, Benjamin R.

Acoustics

Sound-modifying means

Muffler, fluid conducting type

181225, 181231, 181243, 181252, 181263, 181272, 181273, 181277, F01N 110, F01N 114, F01N 702

Patent

active

046167323

ABSTRACT:
A silencing system for exhaust gases from internal combustion engines, comprising an intermediate silencing device for connection to the exhaust manifold of an internal combustion engine, and a final silencing device series connected to the intermediate silencing device, in which the final silencing device comprises, within an envelope, a number of spaced annular members, intersected by radial partition walls, forming series of chambers of different size, which occupy the peripheral portion of the envelope and open towards the axial portion of this latter, leaving this axial portion substantially free for passage of the flow of exhaust gases, and an idle fan is provided for acting onto the passage for the exhaust gases and onto a passage for additional air, which passages join downstream the fan into an exhaust nosepiece. Some annular members are made of a catalytically active material in order to exert a purifying action on the exhaust gases.

REFERENCES:
patent: 2834425 (1958-05-01), Rawson
patent: 2989138 (1961-06-01), Reese
patent: 3894610 (1975-07-01), Halter et al.
patent: 4164266 (1979-08-01), Collin et al.
patent: 4313523 (1982-02-01), Copen
patent: 4371054 (1983-02-01), Wirt
patent: 4487290 (1984-12-01), Flaherty

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