公开(公告)号：EP1478829B1

公开(公告)日：2005-11-30

申请号：EP03706625.5

申请日：2003-02-17

申请人： Renault Trucks ,  Renault s.a.s.

发明人： VIGNASSA, Philippe ,  LE BRAZIDEC, Franck

IPC分类号： F01N1/16 ,  F01N3/08 ,  F02B27/06 ,  F01N3/28 ,  F01N7/02

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

公开(公告)号：EP1478829A1

公开(公告)日：2004-11-24

申请号：EP03706625.5

申请日：2003-02-17

申请人： Renault V.I. ,  Renault s.a.s.

发明人： VIGNASSA, Philippe ,  LE BRAZIDEC, Franck

IPC分类号： F01N1/16 ,  F01N3/08 ,  F02B27/06 ,  F01N3/28 ,  F01N7/02

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 (6) 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 the closing phases of the variable choke device arranged upstream of said active noise reduction system (6) and a cavity dispersing medium and high frequencies (23) arranged downstream of said active noise reduction system (6). The expansion chamber for the closing phases of the variable choke device is integrated in a first depolluting system (29) arranged upstream of said active noise reduction system (6).