Global Patent Index - EP 1058578 A1

EP 1058578 A1 2000-12-13 - 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

EP 1058578 A1 (DE)

Application

EP 98965807 A

Priority

  • DE 19758018 A
  • EP 9808061 W

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 (main, further and additional classification)

B01D 53/94; F01N 3/08

IPC 8 full level (invention and additional information)

G01N 27/44 (2006.01); 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)

CPC (invention and additional information)

F02D 41/0082 (2013.01); F01N 3/0842 (2013.01); F02D 41/0275 (2013.01); F02D 41/028 (2013.01)

Citation (search report)

See references of WO 9933548A1

Designated contracting state (EPC)

DE ES FR GB IT SE

DOCDB simple family

DE 19758018 A1 19990701; CN 1262336 C 20060705; CN 1283133 A 20010207; EP 1058578 A1 20001213; EP 1058578 B1 20030514; JP 2001527188 A 20011225; JP 4299457 B2 20090722; US 6823657 B1 20041130; WO 9933548 A1 19990708