Exhaust after-treatment device conversion efficiency optimization

An after-treatment (AT) system for an exhaust gas flow from an internal combustion engine includes an AT device and an exhaust passage carrying the exhaust gas flow from the engine to the AT device. The system also includes a heat exchanger in fluid communication with the exhaust passage upstream of...

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Bibliographische Detailangaben
Hauptverfasser:	De Filippo, Andrea, Conti, Antonino
Format:	Patent
Sprache:	eng
Schlagworte:	BLASTING COOLING OF INTERNAL-COMBUSTION ENGINES COOLING OF MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNALCOMBUSTION ENGINES GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES ORENGINES IN GENERAL HEATING LIGHTING MACHINES OR ENGINES IN GENERAL MECHANICAL ENGINEERING PERFORMING OPERATIONS PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL SEPARATION STEAM ENGINES TRANSPORTING WEAPONS
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Beschreibung
Zusammenfassung:	An after-treatment (AT) system for an exhaust gas flow from an internal combustion engine includes an AT device and an exhaust passage carrying the exhaust gas flow from the engine to the AT device. The system also includes a heat exchanger in fluid communication with the exhaust passage upstream of the AT device and configured to remove heat energy from the exhaust gas flow. The system additionally includes an exhaust gas flow bypass in fluid communication with the exhaust passage and configured to route the exhaust gas flow from the exhaust passage to the AT device around, i.e., in bypass of, the heat exchanger. Furthermore, the system includes a bypass valve configured to selectively direct the exhaust gas flow to one of the heat exchanger and the exhaust gas flow bypass. A vehicle employing the AT system and a method of operating such an AT system are also disclosed.