EP 1212527 A1 20020612 - METHOD FOR CONTROLLED PURGING OF NITROGEN OXIDE STORING MEANS ASSOCIATED WITH A CATALYTIC CONVERTER
Title (en)
METHOD FOR CONTROLLED PURGING OF NITROGEN OXIDE STORING MEANS ASSOCIATED WITH A CATALYTIC CONVERTER
Title (de)
STEUERVERFAHREN ZUM ENTFERNEN VON STICKOXIDEN VON EINEM ABGASKATASLYSATOR
Title (fr)
PROCEDE DE COMMANDE DE PURGE DE MOYENS DE STOCKAGE D'OXYDES D'AZOTE ASSOCIES A UN POT CATALYTIQUE
Publication
Application
Priority
- FR 0002485 W 20000908
- FR 9911426 A 19990913
Abstract (en)
[origin: FR2798425A1] When the engine operates with an air/fuel mixture poor in fuel, the method consists in monitoring, with a model managing said storage means, the evolution of storage efficacy (Effstoc) of NOx in the storage means and, when the model indicates that said efficacy is below a predetermined threshold, a purging of said storage means is commanded and said purge is stopped when the model indicates that the remaining amount of stored NOx has fallen below another predetermined threshold value. The invention is characterised in that it consists in correcting an initial value, estimated with the model, of several parameters (QNOx, Effpurge, NSC) of the model, on the basis of a signal delivered by an oxygen probe placed in the flux of gases coming from the converter, the storage means having been previously set in an operational mode such that the parameter being adjusted affects the signal.
IPC 1-7
IPC 8 full level
F02D 41/02 (2006.01); F01N 3/08 (2006.01)
CPC (source: EP)
F01N 3/0842 (2013.01); F02D 41/0275 (2013.01); F02D 41/1462 (2013.01); F02D 2200/0802 (2013.01); F02D 2200/0806 (2013.01); F02D 2200/0808 (2013.01); F02D 2200/0811 (2013.01)
Citation (search report)
See references of WO 0120153A1
Designated contracting state (EPC)
DE ES GB IT
DOCDB simple family (publication)
FR 2798425 A1 20010316; FR 2798425 B1 20011207; DE 60024103 D1 20051222; DE 60024103 T2 20060727; EP 1212527 A1 20020612; EP 1212527 B1 20051116; ES 2248117 T3 20060316; WO 0120153 A1 20010322
DOCDB simple family (application)
FR 9911426 A 19990913; DE 60024103 T 20000908; EP 00962586 A 20000908; ES 00962586 T 20000908; FR 0002485 W 20000908