SYSTEM FOR AFTER-TREATMENT OF EXHAUST GAS AND METHOD FOR CONTROLLING OF THE SAME

The present invention provides a system for post-treatment of an exhaust gas which is mounted on an exhaust pipe of an internal combustion engine and sequentially has, on the upstream side, a diesel particulate matter filter (DPF) and a selective catalyst reduction (SCR) technology. The system furth...

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Bibliographische Detailangaben
Hauptverfasser:	CHOI EUN SEK, LEE YANG RO, AN GEY WON, LEE KANG HONG
Format:	Patent
Sprache:	chi ; eng
Schlagworte:	BLASTING 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 STEAM ENGINES WEAPONS
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Beschreibung
Zusammenfassung:	The present invention provides a system for post-treatment of an exhaust gas which is mounted on an exhaust pipe of an internal combustion engine and sequentially has, on the upstream side, a diesel particulate matter filter (DPF) and a selective catalyst reduction (SCR) technology. The system further includes: a burner positioned upstream of the DPF to heat an exhaust gas from the internal combustion engine; a hydrocarbon injector positioned upstream of the DPF to spray hydrocarbon to the exhaust gas; and a control unit controlling the burner and the hydrocarbon injector according to a firstmode for removing nitrogen oxides or a second mode for removing particulates. When the temperature of the exhaust gas does not reach the operating temperature of the SCR, the control unit operates theburner according to the first mode to heat the exhaust gas to the operating temperature of the SCR, or operates the burner while spraying hydrocarbon by using the hydrocarbon injector according to the second mode to heat the