Engine operating system for maximizing efficiency and monitoring performance of an automotive exhaust emission control system

An engine operating system includes an exhaust aftertreatment device and a fuel delivery system for providing fuel to the engine so as to cause the engine's air/fuel ratio to vary on a periodic basis. The exhaust aftertreatment device has a window of maximum operating efficiency characterized b...

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Bibliographische Detailangaben
Hauptverfasser:	FALANDINO, MICHAEL PATRICK, GEE, THOMAS SCOTT, RIDGWAY, ROBERT WILLIAM
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:	An engine operating system includes an exhaust aftertreatment device and a fuel delivery system for providing fuel to the engine so as to cause the engine's air/fuel ratio to vary on a periodic basis. The exhaust aftertreatment device has a window of maximum operating efficiency characterized by storage and release of an exhaust constituent within the aftertreatment device. A controller operates the fuel delivery system and performs a statistical analysis of signals from an exhaust constituent concentration sensor downstream of the exhaust aftertreatment device, so as to assure that the exhaust aftertreatment device is being operated within its window of most efficient operation.