|국가/구분||United States(US) Patent 등록|
|국제특허분류(IPC7판)||F01N-001/02 F01N-001/24 F01N-001/04 F01N-001/08|
|미국특허분류(USC)||181/250; 181/252; 181/256; 181/266; 181/273; 181/276|
|발명자 / 주소|
|출원인 / 주소|
|인용정보||피인용 횟수 : 6 인용 특허 : 31|
The invention relates to an exhaust silencer or muffler for an internal combustion engine, in particular a silencer with the damping characteristics of a resonator with the absorptive characteristics of a dissipative silencer. The silencer of the present invention provides an improved silencer or muffler for use with an internal combustion engine that incorporates both a dissipative silencer and a resonator in a single muffler assembly suitable for use with standard automotive construction techniques.
We claim: 1. A silencer for an internal combustion engine comprising: an outer shell having a body and first and second ends; an exhaust duct carrying exhaust gasses through said body; a dissipative silencer positioned within said body and surrounding said exhaust duct; a Helmholtz resonator comprising a chamber and a throat positioned within said body, wherein said exhaust duct is a perforated exhaust duct and at least one perforation is acoustically coupled to said resonator throat, said throat of said Helmholtz resonator running substantially the len...