EP 1403492 B1 20080827 - Method for operating a direct injection engine
Title (en)
Method for operating a direct injection engine
Title (de)
Verfahren zum Betreiben einer direkteinspritzenden Brennkraftmaschine
Title (fr)
Procédé pour faire fonctionner un moteur à combustion interne à injection directe
Publication
Application
Priority
DE 10244391 A 20020924
Abstract (en)
[origin: EP1403492A2] Process for operating a direct injection I.C. engine containing a catalyst system with a nitrogen oxides storage catalyst comprises storing nitrogen oxides in the storage catalyst under a first operating condition, and releasing the nitrogen oxides from the catalyst under a second operating condition. A predetermined maximum time duration is assigned to each point in a load rotational speed mapping for each first operating condition which then switches to a second operating condition assigned to this point. The first operating condition comprises a lean operation, especially a shift operation and/or homogeneous lean operation. The lambda value for an air-fuel ratio in the first operating condition is more than 1.1. The second operating condition comprises a stoichiometric operation with a lambda value for an air-fuel ratio equal to 1. The predetermined maximum time duration is 0-20 seconds, preferably 0-5 seconds.
IPC 8 full level
F02D 41/30 (2006.01); F01N 3/08 (2006.01); F02D 41/02 (2006.01)
CPC (source: EP)
F01N 3/0814 (2013.01); F01N 3/0842 (2013.01); F02D 41/3029 (2013.01); F02D 41/3076 (2013.01); 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 IT LI LU MC NL PT RO SE SI SK TR
DOCDB simple family (publication)
EP 1403492 A2 20040331; EP 1403492 A3 20060906; EP 1403492 B1 20080827; AT E406514 T1 20080915; DE 10244391 A1 20040401; DE 50310403 D1 20081009
DOCDB simple family (application)
EP 03021026 A 20030917; AT 03021026 T 20030917; DE 10244391 A 20020924; DE 50310403 T 20030917