DOSING ARRANGEMENT FOR A LIQUID EXHAUST GAS AFTER-TREATMENT MEDIUM AND DOSING METHOD

The invention relates to a dosing arrangement (3, 30) for a liquid exhaust gas after-treatment medium for the after-treatment of the exhaust gas from an internal combustion engine having an exhaust gas system, particularly for a urea-water solution, having a delivery pump (7) and a dosing module (13...

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Bibliographische Detailangaben
Hauptverfasser:	GOTTWALD, FRANK, HAMZIC, MIRZA, ZERBIN, SIEGFRIED
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	BLASTING CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TOTRANSPORTATION 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 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:	The invention relates to a dosing arrangement (3, 30) for a liquid exhaust gas after-treatment medium for the after-treatment of the exhaust gas from an internal combustion engine having an exhaust gas system, particularly for a urea-water solution, having a delivery pump (7) and a dosing module (13), wherein the delivery pump (7) is connected to a suction line (23) for drawing in the exhaust gas after-treatment medium from a tank (1); the delivery pump (7) and the dosing module (13) are connected to one another via a pressure line (25) and the exhaust gas after-treatment medium can be fed to the exhaust gas system via the dosing module (13); a recirculation pump (8) connected on the suction side to the dosing module (13) is provided; and the exhaust gas after-treatment medium pumped by the recirculation pump (8) can be returned on the high-pressure side via a line, which is not the same as the suction line (23), to the tank, enabling the lines (23, 25) to be flushed with the exhaust gas after-treatment medium as necessary. The invention further relates to a corresponding method for dosing.