EP 1131549 A1 20010912 - METHOD FOR ADAPTING THE NOx CONCENTRATION OF AN INTERNAL COMBUSTION ENGINE OPERATED WITH AN EXCESS OF AIR
Title (en)
METHOD FOR ADAPTING THE NOx CONCENTRATION OF AN INTERNAL COMBUSTION ENGINE OPERATED WITH AN EXCESS OF AIR
Title (de)
VERFAHREN ZUM ADAPTIEREN DER NOx-ROHKONZENTRATION EINER MIT LUFTÜBERSCHUSS ARBEITENDEN BRENNKRAFTMASCHINE
Title (fr)
PROCEDE POUR ADAPTER LA CONCENTRATION BRUTE EN NOx D'UN MOTEUR A COMBUSTION INTERNE FONCTIONNANT AVEC UN EXCEDENT D'AIR
Publication
Application
Priority
- DE 9903519 W 19991103
- DE 19851477 A 19981109
Abstract (en)
[origin: WO0028201A1] The operating point dependent values for the crude NOx concentration (RK) of the internal combustion engine are read out from an engine characteristics map. The variations in concentration are adapted on the basis of the starting signal of an NOx sensor which is arranged down-stream of the NOx storage catalyst either by modification of a reduction factor (RF) which serves to calculate the corrected crude NOx concentration (KK) from the crude NOx concentration (RK) or by direct correction of the values read out from the engine characteristics map for the crude NOx concentration (RK) with a crude concentration correction factor.
IPC 1-7
IPC 8 full level
F01N 3/08 (2006.01); F01N 3/20 (2006.01); F01N 3/24 (2006.01); F01N 3/28 (2006.01); F02D 35/00 (2006.01); F02D 41/02 (2006.01); F02D 41/04 (2006.01); F02D 41/14 (2006.01)
CPC (source: EP US)
F01N 3/0842 (2013.01 - EP US); F02D 41/0275 (2013.01 - EP US); F02D 41/1402 (2013.01 - EP US); F02D 41/1462 (2013.01 - EP US); F02D 41/1463 (2013.01 - EP US)
Citation (search report)
See references of WO 0028201A1
Designated contracting state (EPC)
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE
DOCDB simple family (publication)
WO 0028201 A1 20000518; DE 59910023 D1 20040826; EP 1131549 A1 20010912; EP 1131549 B1 20040721; JP 2002529652 A 20020910; JP 3531867 B2 20040531; US 2001032457 A1 20011025; US 6438947 B2 20020827
DOCDB simple family (application)
DE 9903519 W 19991103; DE 59910023 T 19991103; EP 99962044 A 19991103; JP 2000581353 A 19991103; US 85234901 A 20010509