EP 0961875 A1 19991208 - METHOD FOR CONTROLLING THE PURGE OF A CATALYST CONTAINER TREATING AN INTERNAL COMBUSTION ENGINE EXHAUST GASES
Title (en)
METHOD FOR CONTROLLING THE PURGE OF A CATALYST CONTAINER TREATING AN INTERNAL COMBUSTION ENGINE EXHAUST GASES
Title (de)
VERFAHREN ZUM STEUERN DER REGENERATION DES ABGASKATALYSATORS EINER BRENNKRAFTMASCHINE
Title (fr)
PROCEDE DE COMMANDE DE PURGE D'UN POT CATALYTIQUE DE TRAITEMENT DES GAZ D'ECHAPPEMENT D'UN MOTEUR A COMBUSTION INTERNE
Publication
Application
Priority
- FR 9802696 W 19981211
- FR 9715775 A 19971212
Abstract (en)
[origin: FR2772428A1] The invention concerns a catalyst container (6) comprising means absorbing nitrogen oxides contained in said gases and a method consisting in starting a purge by increasing the richness (R) of the engine (1) air/fuel mixture supply, on the basis of a richness corresponding to a lean or stoichiometric mixture; evaluating, using a table based on the container (6) temperature (T>cat<) and rate of filling (NS/NSC) with nitrogen oxides, the efficacy (EFFNOX; EFFSTOCK) of the container in absorbing nitrogen oxides when the engine (1) operates with lean mixture, and in starting a purge of the container (6) when said efficacy (EFFNOX; EFFSTOCK) falls below a predetermined value (Eff_min), based on the container (6) temperature (T>cat<). The invention is applicable to an internal engine powering a motor vehicle.
IPC 1-7
IPC 8 full level
F01N 3/08 (2006.01); F02D 41/02 (2006.01)
CPC (source: EP)
F01N 3/0842 (2013.01); F01N 3/0871 (2013.01); F02D 41/0275 (2013.01); F01N 2250/12 (2013.01); F01N 2550/03 (2013.01); F02D 2200/0806 (2013.01); F02D 2200/0811 (2013.01)
Citation (search report)
See references of WO 9931368A1
Designated contracting state (EPC)
DE ES GB IT
DOCDB simple family (publication)
FR 2772428 A1 19990618; FR 2772428 B1 20000218; DE 69811863 D1 20030410; DE 69811863 T2 20040304; EP 0961875 A1 19991208; EP 0961875 B1 20030305; ES 2190123 T3 20030716; WO 9931368 A1 19990624
DOCDB simple family (application)
FR 9715775 A 19971212; DE 69811863 T 19981211; EP 98959959 A 19981211; ES 98959959 T 19981211; FR 9802696 W 19981211