METHOD AND SYSTEM FOR CONTROL OF EMISSIONS IN EXHAUST AFTERTREATMENT SYSTEM

A system includes a controller configured to compare a nitrogen oxides (NO X ) concentration within treated exhaust gases from a combustion engine 12 after flowing through a first catalyst assembly 22 and a second catalyst assembly 24 relative to a NO X threshold value, to determine a change in O 2...

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Bibliographische Detailangaben
Hauptverfasser:	DEVARAKONDA, MARUTHI NARASINGA RAO, VON DER EHE, JAMES KRISTOPHER, SPAULDING, DENNIS JOHN
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	BLASTING 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 LIGHTING MACHINES OR ENGINES IN GENERAL MECHANICAL ENGINEERING STEAM ENGINES WEAPONS
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Beschreibung
Zusammenfassung:	A system includes a controller configured to compare a nitrogen oxides (NO X ) concentration within treated exhaust gases from a combustion engine 12 after flowing through a first catalyst assembly 22 and a second catalyst assembly 24 relative to a NO X threshold value, to determine a change in O 2 concentration within the treated exhaust gases between the first and second catalyst assemblies 22,24 upstream of a location of oxidant injection into the treated exhaust gases, and to adjust an air-fuel ratio of the combustion engine based on the change in O 2 concentration in the treated exhaust gases if the NO X concentration is greater than the NO X threshold value.