Monitoring the light-off temperature of a catalyst

Monitoring the light-off temperature of a diesel oxidation catalyst of a combustion engine, comprising the steps of measuring the temperature of the exhaust gas upstream and downstream of the catalyst during an injection phase of the engine, determining whether a catalyst light-off occurred by using...

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Bibliographische Detailangaben
Hauptverfasser:	ALEXANDER LEU, TORSTEN MUELLER, MARKUS WESSLAU
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:	Monitoring the light-off temperature of a diesel oxidation catalyst of a combustion engine, comprising the steps of measuring the temperature of the exhaust gas upstream and downstream of the catalyst during an injection phase of the engine, determining whether a catalyst light-off occurred by using the measured temperatures, calculating the surface temperature 108 of the catalyst by using the measured temperatures, and defining the calculated temperature as light-off temperature in the case that a catalyst light-off is confirmed. By means of this method it is possible to determine the actual light-off temperature of the catalyst der instance after each engine start by means of calculating the surface temperature of the catalyst. Since the light-off temperature is not considered as a constant but as a changing variable, the aging of the catalyst is sufficiently considered. Thus, it is provided a means for monitoring the light-off temperature of a diesel oxidation catalyst considering an aging of the catalyst.