EP 1270911 B1 20051228 - Exhaust gas purifying facility with nitrogen oxides absorption-reduction catalyst
Title (en)
Exhaust gas purifying facility with nitrogen oxides absorption-reduction catalyst
Title (de)
Vorrichtung zur Reinigung des Abgases mit einem Stickoxidfallekatalysator
Title (fr)
Dispositif d'épuration de gaz d'échappement avec un piège à NOx
Publication
Application
Priority
EP 01115558 A 20010628
Abstract (en)
[origin: EP1270911A1] In an exhaust gas purifying apparatus 1 provided with a nitrogen oxides absorption-reduction catalyst 2 for executing rich spike when the integrated value NOx mass of the NOx computed from the operating state of the engine E exceeds the predetermined first reference value NOxSL. a NOx sensor 13 is provided downstream from the nitrogen oxides absorption-reduction catalyst 2 so that the predetermined first reference value NOxSL is corrected when the value RSNOx detected by the NOx sensor 13 immediately after the rich spike is executed exceeds the predetermined second reference value RSSL. In this arrangement, since the variations in the NOx absorbing amount caused by the deterioration of the catalyst is monitored using the value detected by the NOx sensor for introducing a rich spike at appropriate moments, the purifying performance with respect to NOx in exhaust gas can be improved outstandingly as a hole. <IMAGE>
IPC 1-7
IPC 8 full level
F02D 41/02 (2006.01); F02D 41/14 (2006.01); F01N 3/08 (2006.01)
CPC (source: EP)
F01N 3/0842 (2013.01); F02D 41/0275 (2013.01); F02D 41/028 (2013.01); F02D 41/146 (2013.01); F02D 41/1462 (2013.01); F02D 41/1463 (2013.01); F01N 2570/04 (2013.01); F02D 41/1402 (2013.01); F02D 2200/0806 (2013.01)
Designated contracting state (EPC)
DE FR GB IT SE
DOCDB simple family (publication)
EP 1270911 A1 20030102; EP 1270911 B1 20051228; DE 60116278 D1 20060202; DE 60116278 T2 20060803
DOCDB simple family (application)
EP 01115558 A 20010628; DE 60116278 T 20010628