Silencing device for internal combustion engine

Details Silencing device for internal combustion engine Silencing device for internal combustion engine

1987-04-06

1988-10-25

Fuller, B. R.

Acoustics

Sound-modifying means

Muffler, fluid conducting type

181255, 181273, F01N 102

Patent

active

047797037

ABSTRACT:
A silencing device for an internal combustion engine includes an expansion chamber which may be implemented with a prechamber, a muffler or the like installed in an exhaust system of the engine. An exhaust pipe connected to the expansion chamber is provided with a double-layer structure consisting of an inner conduit through which exhaust gases flow and an outer conduit which surrounds the inner conduit. An air gap defined between the inner and outer conduits is opened into the expansion chamber at one end and closed at the other end so as to serve as a resonance chamber.

REFERENCES:
patent: 3338331 (1967-08-01), Jekkinghoff
patent: 3543878 (1970-12-01), Hamilton
patent: 3648803 (1972-03-01), Heath et al.
patent: 3780876 (1973-12-01), Hubbell, III

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