Controlling a Desuiphation Process of a Lean NOx trap

The invention provides a method of controlling a desuiphation process of a lean NOx trap (281), the method comprising cycles of the following steps, starting 20 a lean phase (510, fig.4) of the desuiphation process (DeSOx), defining 21' an adaptive minimum duration for said lean phase (510, fig...

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Bibliographische Detailangaben
Hauptverfasser:	ANDREA DUTTO, ROBERTO ARGOLINI, DAVIDE MERCURI, ARMANDO MOGAVERO
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 PERFORMING OPERATIONS PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL SEPARATION STEAM ENGINES TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE TRANSPORTING WEAPONS
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Beschreibung
Zusammenfassung:	The invention provides a method of controlling a desuiphation process of a lean NOx trap (281), the method comprising cycles of the following steps, starting 20 a lean phase (510, fig.4) of the desuiphation process (DeSOx), defining 21' an adaptive minimum duration for said lean phase (510, fig.4) based on the rich phase duration of the previous cycle, starting 22 a rich phase (520, fig,4) of a desuiphation process, if activation conditions 21" of said rich phase are met, checking 23 deactivation conditions of said rich phase (520, fig.4) and ending the rich phase, when such deactivation conditions are met. The rich phase activation and deactivation conditions can be that the engine is operating inside a permitted area of an engine map, and the exhaust temperature (500, fig.4) is in a range between a lower and upper thresholds.