Method and system for diagnosing efficiency of an aftertreatment system of an internal combustion engine

An aftertreatment system for an internal combustion system includes an exhaust duct, an oxidation catalyst disposed in the exhaust duct and a particulate filter disposed in the exhaust duct downstream of the oxidation catalyst. The internal combustion engine is operated to perform a regeneration pro...

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Bibliographische Detailangaben
Hauptverfasser:	Carminati Paolo Francesco, Cassani Stefano, Sacco Nicola Pio
Format:	Patent
Sprache:	eng
Schlagworte:	BLASTING CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TOTRANSPORTATION 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 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:	An aftertreatment system for an internal combustion system includes an exhaust duct, an oxidation catalyst disposed in the exhaust duct and a particulate filter disposed in the exhaust duct downstream of the oxidation catalyst. The internal combustion engine is operated to perform a regeneration process of the particulate filter. A first value of exhaust gas temperature in the exhaust duct between the oxidation catalyst and the particulate filter is determined. A second value of exhaust gas temperature in the exhaust duct downstream of the particulate filter is determined. A malfunctioning of the oxidation catalyst is determined when the first value of exhaust gas temperature is below a first predetermined threshold value thereof and contemporaneously the second value of exhaust gas temperature is above a second predetermined threshold value thereof during the regeneration process.