Systems and methods for controlling regeneration of nitrogen oxide adsorbers

An exhaust treatment system includes a nitrogen oxide (NOx) monitoring module and a regeneration control module. The NOx monitoring module monitors first and second NOx levels in an exhaust stream produced by an engine, wherein the first NOx level is measured between first and second portions of a s...

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Bibliographische Detailangaben
1. Verfasser:	FURNESS MARY BETH
Format:	Patent
Sprache:	chi ; eng
Schlagworte:	BLASTING CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY 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 THEIR RELEVANT APPARATUS TRANSPORTING WEAPONS
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Beschreibung
Zusammenfassung:	An exhaust treatment system includes a nitrogen oxide (NOx) monitoring module and a regeneration control module. The NOx monitoring module monitors first and second NOx levels in an exhaust stream produced by an engine, wherein the first NOx level is measured between first and second portions of a substrate of a NOx adsorber, wherein the second NOx level is measured upstream from the first portion of the substrate, and wherein the first portion of the substrate is upstream from the second portion of the substrate. The regeneration control module initiates a regeneration cycle of the NOx adsorber when the first NOx level is greater than a predetermined percentage of the second NOx level, wherein the regeneration cycle includes injecting hydrocarbons (HC) into the exhaust stream at a location upstream from the NOx adsorber.