METHOD OF REGENERATING NITROGEN OXIDE STORAGE CATALYST

PROBLEM TO BE SOLVED: To improve a method of regenerating a nitrogen oxide storage catalyst at a low exhaust gas and catalyst temperature when the exhaust gas from a diesel engine is cleaned. SOLUTION: When the temperature of the exhaust gas exceeds a limited one, a first regenerating method for cha...

Ausführliche Beschreibung

Gespeichert in:

Bibliographische Detailangaben
Hauptverfasser:	ROHR FRIEDEMANN, KREUZER THOMAS DR, LOX EGBERT DR, KATTWINKEL PETER, PETER STEFAN DIETRICH
Format:	Patent
Sprache:	eng
Schlagworte:	BLASTING CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY COMBUSTION ENGINES CONTROLLING COMBUSTION ENGINES ENGINE PLANTS IN GENERAL GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNALCOMBUSTION ENGINES GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES ORENGINES IN GENERAL HEATING HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS LIGHTING MACHINES OR ENGINES IN GENERAL MECHANICAL ENGINEERING PERFORMING OPERATIONS PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL SEPARATION STEAM ENGINES THEIR RELEVANT APPARATUS TRANSPORTING WEAPONS
Online-Zugang:	Volltext bestellen
Tags:	Tag hinzufügen Keine Tags, Fügen Sie den ersten Tag hinzu!

Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To improve a method of regenerating a nitrogen oxide storage catalyst at a low exhaust gas and catalyst temperature when the exhaust gas from a diesel engine is cleaned. SOLUTION: When the temperature of the exhaust gas exceeds a limited one, a first regenerating method for changing a lean air-fuel ratio to a rich air-fuel ratio during the first regeneration time is applied. When the temperature of the exhaust gas is below the limited temperature, a second regenerating method is applied such that the lean air-fuel ratio and the rich air-fuel ratio are switched back and forth forming a sequence of rich/lean pulses with the number of 2-10 rich/lean pulses during the second regeneration time. COPYRIGHT: (C)2004,JPO