EP 1507964 A1 20050223 - SPARK IGNITION ENGINE INCLUDING THREE-WAY CATALYST WITH NOX STORAGE COMPONENT
Title (en)
SPARK IGNITION ENGINE INCLUDING THREE-WAY CATALYST WITH NOX STORAGE COMPONENT
Title (de)
FREMDGEZÜNDETE BRENNKRAFTMASCHINE MIT DREIWEGEKATALYSATOR MIT NOX-SPEICHERKOMPONENTE
Title (fr)
MOTEUR A EXPLOSION POSSEDANT UN CATALYSEUR A TROIS VOIES AVEC COMPOSANT DE STOCKAGE D'OXYDE D'AZOTE
Publication
Application
Priority
- GB 0302200 W 20030521
- GB 0211971 A 20020524
Abstract (en)
[origin: WO03100228A1] A spark engine comprises an exhaust system comprising a catalyst comprising a three-way catalyst (TWC) including a NOx storage component and an engine control unit programmed to control the air-to-fuel ratio of the engine to run at the stoichiometric air-to-fuel ratio during normal running conditions and to run lean of the stoichiometric air-to-fuel ratio during a defined portion of an engine speed/load and to determine the amount of NOx contacting the TWC during lean running operation in response to data input from sensor means, thereby to determine the remaining NOx storage capacity of the TWC and to return the air-to-fuel ratio to stoichiometry when the remaining NOx storage capacity is below a pre-determined value, the arrangement being such as to substantially prevent passing more NOx to atmosphere during an engine cycle compared with a spark ignition engine run continuously in stoichiometric mode.
IPC 1-7
IPC 8 full level
F02M 21/02 (2006.01); B01D 53/94 (2006.01); F01N 3/08 (2006.01); F01N 3/10 (2006.01); F01N 3/24 (2006.01); F01N 3/28 (2006.01); F02D 19/08 (2006.01); F02D 21/08 (2006.01); F02D 41/02 (2006.01); F02D 41/08 (2006.01); F02D 45/00 (2006.01)
CPC (source: EP KR US)
B01D 53/9445 (2013.01 - EP US); B01D 53/9495 (2013.01 - EP US); F01N 3/08 (2013.01 - KR); F01N 3/0814 (2013.01 - EP US); F01N 3/0842 (2013.01 - EP US); F02D 41/02 (2013.01 - KR); F02D 41/0275 (2013.01 - EP US); F01N 2570/16 (2013.01 - EP US); F02D 2200/0806 (2013.01 - EP US); Y02A 50/20 (2017.12 - EP US); Y02T 10/12 (2013.01 - EP US)
Citation (search report)
See references of WO 03100228A1
Designated contracting state (EPC)
DE FI FR GB SE
DOCDB simple family (publication)
WO 03100228 A1 20031204; EP 1507964 A1 20050223; GB 0211971 D0 20020703; JP 2005534841 A 20051117; JP 4494201 B2 20100630; KR 20050013996 A 20050205; US 2006075740 A1 20060413
DOCDB simple family (application)
GB 0302200 W 20030521; EP 03725426 A 20030521; GB 0211971 A 20020524; JP 2004507658 A 20030521; KR 20047018993 A 20030521; US 51552905 A 20050824