EP 2057366 A1 20090513 - CATALYST MONITORING SYSTEM AND MONITORING METHOD
Title (en)
CATALYST MONITORING SYSTEM AND MONITORING METHOD
Title (de)
SYSTEM UND VERFAHREN ZUR KATALYSATORÜBERWACHUNG
Title (fr)
SYSTÈME ET PROCÉDÉ DE SURVEILLANCE DU FONCTIONNEMENT D'UN CATALYSEUR
Publication
Application
Priority
- IB 2007002467 W 20070828
- JP 2006234408 A 20060830
Abstract (en)
[origin: WO2008029236A1] A catalyst monitoring system diagnoses deterioration of an NOx catalyst (18) which is arranged in an exhaust passage (12) of an internal combustion engine (10). An NOx sensor (25) is arranged downstream of the NOx catalyst (18). An output integrated value of the NOx sensor (25) is calculated by integrating an output from the NOx sensor (25) is calclated by integrating an outputfrom the NOx sensor (25) during at least a period near the end of rich spike control. Deterioration of the NOx catalyst (18) is diagnosed based on the output integrated value of the NOx sensor (25), as there is a correlation between the amount of ammonia NH3 which flows downstream of the NOx catalyst and the NOx sensor output integrated value near the line when the rich spike control ends.
IPC 8 full level
F02D 41/02 (2006.01); F02D 41/14 (2006.01)
CPC (source: EP US)
F01N 3/0814 (2013.01 - EP US); F01N 3/0842 (2013.01 - EP US); F01N 11/002 (2013.01 - EP US); F01N 11/007 (2013.01 - EP US); F01N 13/009 (2014.06 - EP US); F01N 13/011 (2014.06 - EP US); F02D 41/0275 (2013.01 - EP US); F02D 41/146 (2013.01 - EP US); F02D 41/1463 (2013.01 - EP US); F01N 13/107 (2013.01 - EP US); F01N 2550/02 (2013.01 - EP US); F01N 2560/02 (2013.01 - EP US); F01N 2560/026 (2013.01 - EP US); F02D 41/1441 (2013.01 - EP US); F02D 2041/1468 (2013.01 - EP US); Y02T 10/40 (2013.01 - EP US)
Citation (search report)
See references of WO 2008029236A1
Designated contracting state (EPC)
DE FR
Designated extension state (EPC)
AL BA HR MK RS
DOCDB simple family (publication)
WO 2008029236 A1 20080313; CN 101512130 A 20090819; EP 2057366 A1 20090513; JP 2008057404 A 20080313; JP 4737010 B2 20110727; US 2009199543 A1 20090813
DOCDB simple family (application)
IB 2007002467 W 20070828; CN 200780032174 A 20070828; EP 07804841 A 20070828; JP 2006234408 A 20060830; US 30983607 A 20070828