EP 1085198 A3 20011107 - Actively controlled induction noise using a multipole inlet
Title (en)
Actively controlled induction noise using a multipole inlet
Title (de)
Aktiv gesteuerter Einlasslärm mit Multipole-Einlassvorrichtung
Title (fr)
Bruit d'admission contrôlé activement utilisant une admission multipôle
Publication
Application
Priority
US 15372299 P 19990914
Abstract (en)
[origin: EP1085198A2] An active noise attenuation assembly for an air induction system of an internal combustion engine is located in an air inlet duct leading to the engine. A fairing body is concentrically mounted within the duct and defines an annular space with the duct through which air travels. A loudspeaker is mounted on the fairing body facing outwardly from the duct. A controller generates an electrical signal amplified and phase shifted from a noise field emanating from the engine. The signal is applied to the loudspeaker for broadcasting a sound field phase shifted from the noise field for attenuating the noise field. A transition housing forms a first plurality of channels and a second plurality of channels. The housing mates to the outlet opening of the inlet duct. The first plurality of channels communicates with the loudspeaker and the second plurality of channels communicates with the annular space. The channels terminate at an end opposite the duct in a checkered pattern. <IMAGE>
IPC 1-7
IPC 8 full level
F02M 35/12 (2006.01)
CPC (source: EP)
F02M 35/1227 (2013.01); F02M 35/125 (2013.01)
Citation (search report)
- [A] WO 9720307 A1 19970605 - SIEMENS ELECTRIC LTD [CA]
- [A] EP 0884471 A2 19981216 - SIEMENS CANADA LTD [CA]
- [A] FR 2740599 A1 19970430 - TECHNOFIRST [FR]
- [A] US 3936606 A 19760203 - WANKE RONALD L
Designated contracting state (EPC)
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE
DOCDB simple family (publication)
EP 1085198 A2 20010321; EP 1085198 A3 20011107; EP 1085198 B1 20021204; DE 60000904 D1 20030116; DE 60000904 T2 20030918
DOCDB simple family (application)
EP 00119166 A 20000905; DE 60000904 T 20000905