EP 0922846 B1 20040526 - Process for the reduction of the content of NOx in the exhaust gas of an internal combustion engine
Title (en)
Process for the reduction of the content of NOx in the exhaust gas of an internal combustion engine
Title (de)
Verfahren zur NOx-Reduzierung an gemischverdichtenden Brennkraftmaschinen
Title (fr)
Procédé pour la réduction de la teneur en NOx des gaz d'échappement d'un moteur à combustion interne.
Publication
Application
Priority
DE 19755299 A 19971212
Abstract (en)
[origin: EP0922846A2] In an internal combustion engine NOx reduction process, the lambda value is reduced at a low mean combustion space temperature and increased at a high mean temperature so that the engine can run near the cut-out limit under any operating conditions. In a NOx reduction process for a mixture-compression internal combustion engine running in lean burn mode with a fuel/air ratio lambda of greater than 1, the lambda value is smoothly regulated by an engine control unit in accordance with the mean engine combustion space temperature such that the lambda value is reduced at a low mean temperature and increased at a high mean temperature so that the engine can be operated near the cut-out limit under any operating conditions.
IPC 1-7
IPC 8 full level
C12N 15/90 (2006.01); F02D 33/02 (2006.01); F02D 41/14 (2006.01)
CPC (source: EP)
F02D 41/1475 (2013.01); F02D 41/1498 (2013.01); F02D 41/1446 (2013.01); F02D 2200/1015 (2013.01); F02D 2250/36 (2013.01)
Designated contracting state (EPC)
DE FR IT NL SE
DOCDB simple family (publication)
EP 0922846 A2 19990616; EP 0922846 A3 20020515; EP 0922846 B1 20040526; AU 9705398 A 19990701; CA 2255462 A1 19990612; DE 19755299 A1 19990617; DE 59811462 D1 20040701
DOCDB simple family (application)
EP 98120906 A 19981104; AU 9705398 A 19981210; CA 2255462 A 19981211; DE 19755299 A 19971212; DE 59811462 T 19981104