EP 1124050 A3 20040225 - Method and device for desulphating a nox accumulator catalyst
Title (en)
Method and device for desulphating a nox accumulator catalyst
Title (de)
Verfahren und Vorrichtung zur Desulfatisierung eines Stickoxidspeicherkatalysators
Title (fr)
Procédé et dispositif de la désulfatation d'un catalyseur accumulateur de nox
Publication
Application
Priority
DE 10005473 A 20000208
Abstract (en)
[origin: EP1124050A2] Process for operating an internal combustion engine comprises a multiple step process in which the NOx emissions in the exhaust gas are initially continuously or intermittently measured after the NOx storage catalyst. Process for operating an engine comprises measuring the NOx emissions in the exhaust gas after a NOx storage catalyst either continuously or intermittently and simultaneously determining a further value for a NOx concentration before the storage catalyst; producing a quotient from the value of the NOx concentration before the catalyst to the NOx measured value after the catalyst and comparing with a first theoretical value; desulfurizing on exceeding the first theoretical value depending on the engine load; measuring the NOx concentration in the combustion exhaust gas after the storage catalyst during desulfurizing and simultaneously determining a further value for the NOx concentration before the catalyst; forming a quotient from the value of the NOx concentration before the catalyst to the NOx measured value after the catalyst and comparing with a second theoretical value. An Independent claim is also included for a device for operating an internal combustion engine comprising a NOx sensor (5) arranged in the flow direction after the NOx storage catalyst (4) and connected to a control device (1). Preferred Features: A further NOx sensor is arranged before the NOx storage catalyst and connected to the control device.
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 41/028 (2013.01); F02D 41/1441 (2013.01); F02D 41/146 (2013.01); F02D 41/1462 (2013.01); F02D 41/1463 (2013.01); F01N 2570/04 (2013.01); F02D 2200/0811 (2013.01)
Citation (search report)
- [A] EP 0915244 A2 19990512 - MITSUBISHI MOTORS CORP [JP]
- [A] EP 0972927 A2 20000119 - DENSO CORP [JP]
- [A] EP 0962639 A1 19991208 - RENAULT [FR]
- [DA] DE 19859462 A1 19990909 - FORD GLOBAL TECH [US]
- [A] US 5724808 A 19980310 - ITO HIROSHI [JP], et al
- [A] DE 19827195 A1 19991223 - VOLKSWAGEN AG [DE]
Designated contracting state (EPC)
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR
DOCDB simple family (publication)
EP 1124050 A2 20010816; EP 1124050 A3 20040225; EP 1124050 B1 20051221; DE 10005473 A1 20010809; DE 10005473 C2 20020117; DE 50108418 D1 20060126
DOCDB simple family (application)
EP 01101850 A 20010126; DE 10005473 A 20000208; DE 50108418 T 20010126