EP 1734240 B1 20080507 - Method for operating an exhaust gas purification system
Title (en)
Method for operating an exhaust gas purification system
Title (de)
Verfahren zum Betrieb eines Abgasreinigungssystem
Title (fr)
Procédé de fonctionnement d'un système de purification de gaz d'échappement
Publication
Application
Priority
EP 05105379 A 20050617
Abstract (en)
[origin: EP1734240A1] The invention concerns a method for operating an exhaust gas purification system, said system comprising a controllable internal combustion engine adapted to predominantly operate under lean conditions, and a NO x -adsorbing unit capable of storing NO x during lean conditions and converting NO x into N 2 during rich or stoichiometric conditions, said system having a capability of oxidizing HC and CO and reducing NO x under stoichiometric conditions. The invention is characterized in that the method comprises the steps of determining a representation of a mass flow of NO x in the exhaust gas and a current storage capacity of the NO x -adsorbing unit, and switching engine operation mode between lean conditions and stoichiometric conditions depending on the representation of the NO x mass flow in the exhaust gas and the current storage capacity of the NO x -adsorbing unit.
IPC 8 full level
F02D 41/02 (2006.01); F01N 3/08 (2006.01)
CPC (source: EP)
F01N 3/0814 (2013.01); F01N 3/0821 (2013.01); F01N 3/0842 (2013.01); F01N 13/009 (2014.06); F02D 41/0275 (2013.01)
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU MC NL PL PT RO SE SI SK TR
DOCDB simple family (publication)
EP 1734240 A1 20061220; EP 1734240 B1 20080507; AT E394589 T1 20080515; DE 602005006545 D1 20080619
DOCDB simple family (application)
EP 05105379 A 20050617; AT 05105379 T 20050617; DE 602005006545 T 20050617