Global Patent Index - EP 1163431 A1

EP 1163431 A1 2001-12-19 - METHOD FOR OPERATION OF A NOx STORAGE CATALYST IN INTERNAL COMBUSTION ENGINES

Title (en)

METHOD FOR OPERATION OF A NOx STORAGE CATALYST IN INTERNAL COMBUSTION ENGINES

Title (de)

VERFAHREN ZUM BETRIEB EINES NOx-SPEICHERKATALYSATORS BEI BRENNKRAFTMASCHINEN

Title (fr)

DISPOSITIF D'UTILISATION D'UN CATALYSEUR A ACCUMULATEUR DE NOx DANS DES MOTEURS A COMBUSTION INTERNE

Publication

EP 1163431 A1 (DE)

Application

EP 00991568 A

Priority

  • DE 0004635 W
  • DE 19963624 A

Abstract (en)

[origin: WO0149985A1] A method for the regeneration of a NOx store, in the exhaust of an internal combustion engine is disclosed, whereby, in the case of an excess of oxygen in the exhaust gas, NOx is removed from the exhaust gas and in the case of an oxygen deficiency, NOx is regenerated by the addition of nitrogen. Said method comprises alternating between a first phase, with an oxygen excess and a second phase, with an oxygen deficiency in the exhaust gas, whereby the oxygen deficiency in the exhaust gas, for regeneration of the storage catalyst, is generated by a fixed, constantly maintained mass of excess fuel in the exhaust gas prior to the NOx store.

IPC 1-7 (main, further and additional classification)

F01N 3/08; F02D 41/02

IPC 8 full level (invention and additional information)

F01N 3/20 (2006.01); F01N 3/08 (2006.01); F01N 3/28 (2006.01); F02D 41/02 (2006.01); F02D 41/04 (2006.01)

CPC (invention and additional information)

F01N 3/0842 (2013.01); F01N 3/0871 (2013.01); F02D 41/0275 (2013.01); F01N 2610/03 (2013.01)

Citation (search report)

See references of WO 0149985A1

Designated contracting state (EPC)

AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR

EPO simple patent family

WO 0149985 A1 20010712; CN 1342244 A 20020327; DE 19963624 A1 20010712; EP 1163431 A1 20011219; EP 1163431 B1 20031126; JP 2003519317 A 20030617; US 2002134075 A1 20020926

INPADOC legal status


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