EP 1058578 A1 20001213 - REGENERATION OF A NOX STORAGE CATALYTIC CONVERTER OF AN INTERNAL COMBUSTION ENGINE
Title (en)
REGENERATION OF A NOX STORAGE CATALYTIC CONVERTER OF AN INTERNAL COMBUSTION ENGINE
Title (de)
REGENERATION EINES NOx-SPEICHERKATALYSATORS EINES VERBRENNUNGSMOTORS
Title (fr)
REGENERATION D'UN CATALYSEUR A ACCUMULATEUR DE NOx DANS UN MOTEUR A COMBUSTION INTERNE
Publication
Application
Priority
- DE 19758018 A 19971229
- EP 9808061 W 19981210
Abstract (en)
[origin: DE19758018A1] The invention relates to an exhaust-gas cleaning device of an internal combustion engine with more than one cylinder, comprising an NOx storage catalytic converter positioned downstream from the internal combustion engine. The exhaust gas continuously flows into the NOx storage element of the catalytic converter in such a way that the NOx is absorbed in the NOx storage element as soon as the machine is run on a lean mixture and that NOx is released as soon as the oxygen concentration of the exhaust gas decreases, such that during the NOx release phase the engine is run at a gross lambda value which is slightly higher than the stoichiometric ratio of lambda = 1. To generate the near-stiochiometric exhaust gas flow with a gross value of lambda >/=1 some of the engine cylinders selectively and individually receive an enriched mixture while the remaining cylinders continue to be run on a lean mixture.
IPC 1-7
IPC 8 full level
B01D 53/94 (2006.01); B01D 57/02 (2006.01); B03C 5/02 (2006.01); F01N 3/08 (2006.01); F01N 3/20 (2006.01); F02D 41/00 (2006.01); F02D 41/02 (2006.01); F02D 41/04 (2006.01); F02D 41/34 (2006.01); G01N 27/44 (2006.01)
CPC (source: EP US)
F01N 3/0842 (2013.01 - EP US); F02D 41/0082 (2013.01 - EP US); F02D 41/0275 (2013.01 - EP US); F02D 41/028 (2013.01 - EP US)
Citation (search report)
See references of WO 9933548A1
Designated contracting state (EPC)
DE ES FR GB IT SE
DOCDB simple family (publication)
DE 19758018 A1 19990701; CN 1262336 C 20060705; CN 1283133 A 20010207; DE 59808396 D1 20030618; EP 1058578 A1 20001213; EP 1058578 B1 20030514; JP 2001527188 A 20011225; JP 4299457 B2 20090722; US 6823657 B1 20041130; WO 9933548 A1 19990708
DOCDB simple family (application)
DE 19758018 A 19971229; CN 98812734 A 19981210; DE 59808396 T 19981210; EP 9808061 W 19981210; EP 98965807 A 19981210; JP 2000526286 A 19981210; US 58268100 A 20000830