公开(公告)号：US07328574B2

公开(公告)日：2008-02-12

申请号：US10897300

申请日：2004-07-22

申请人： Philippe Vignassa ,  Franck Le Brazidec

发明人： Philippe Vignassa ,  Franck Le Brazidec

IPC分类号： F01N7/00

CPC分类号： F01N3/2066 ,  F01N1/089 ,  F01N1/165 ,  F01N1/168 ,  F01N3/0231 ,  F01N3/035 ,  F01N3/2885 ,  F01N13/009 ,  F01N2230/02 ,  F01N2230/04 ,  F01N2240/36 ,  F01N2260/16 ,  F01N2470/18 ,  F01N2570/14 ,  F01N2610/02 ,  F02D9/04 ,  Y02A50/2325 ,  Y02T10/24

摘要： The invention concerns an internal combustion engine exhaust line comprising an active noise reduction system with variable choke device, continuously regulated based on the instantaneous discharge rate pulses of exhaust gases exiting from the internal combustion engine, including an expansion chamber for closing phases of the variable choke device arranged upstream of said active noise reduction system and a cavity dispersing medium and high frequencies arranged downstream of the active noise reduction system. The expansion chamber for the closing phases of the variable choke device is integrated in a first depolluting system arranged upstream of said active noise reduction system.

摘要翻译： 本发明涉及一种内燃机排气管线，其包括具有可变节流装置的主动降噪系统，其基于从内燃机排出的废气的瞬时排放速率脉冲连续调节，包括用于闭合可变节流器的相的膨胀室 布置在所述有源降噪系统的上游的器件以及布置在主动降噪系统的下游的空腔分散介质和高频。 用于可变节流装置的闭合相的膨胀室被集成在布置在所述主动降噪系统的上游的第一去污系统中。