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).

公开(公告)号：EP1825132A1

公开(公告)日：2007-08-29

申请号：EP04816511.2

申请日：2004-12-06

申请人： Renault V.I.

发明人： VIGNASSA, Philippe ,  PARET, Alain

IPC分类号： F02M35/08 ,  F01N5/04 ,  B01F5/04 ,  F01N1/24 ,  F01N1/14

CPC分类号： F01N1/24 ,  B01F5/0415 ,  B01F5/0426 ,  F01N1/14 ,  F01N5/04 ,  F01N2470/30 ,  Y02T10/16

摘要： The invention relates to an element (20) for the exhaust circuit of an internal combustion engine comprising a member (21) arranged in a part of the internal space thereof in such a way that a Venturi is formed for generating a negative pressure used for suctioning (D) and ejecting dust (D) collected by an air filter with exhaust gas (GE). The member (21) comprises at least one intake opening (35) which is embodied upstream of a body (28) is substantially symmetrical with respect to the axis of symmetry (29) which is parallel to the exhaust gas flow direction. Said member (21) is characterised in that the external face of the body (28) is provided with a section which is angled (alpha 1, alpha 2) with respect of said axis and whose inclination increases in the direction of the exhaust gas flow (GE).