Nox trap efficiency

A more accurate method for determining a NOx storage efficiency of an exhaust gas aftertreatment device is presented. The method teaches determining NOx storage efficiency as a function of available LNT NOx storage capacity, which is calculated based on a ratio of an instantaneous value of an amount...

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Bibliographische Detailangaben
Hauptverfasser:	INGRAM GRANT ALAN, SURNILLA GOPICHANDRA
Format:	Patent
Sprache:	eng
Schlagworte:	BLASTING CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TOTRANSPORTATION 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 GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS HEATING HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS LIGHTING MACHINES OR ENGINES IN GENERAL MECHANICAL ENGINEERING STEAM ENGINES TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE WEAPONS
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Beschreibung
Zusammenfassung:	A more accurate method for determining a NOx storage efficiency of an exhaust gas aftertreatment device is presented. The method teaches determining NOx storage efficiency as a function of available LNT NOx storage capacity, which is calculated based on a ratio of an instantaneous value of an amount of NOx stored in the device and total device storage capacity at present operating conditions. Using this method prevents overfilling of the device and inefficient purging, thus improving emission control and fuel economy.