METHOD FOR DETECTING A BLOCKED PRESSURE CONDUCT

A method of detecting a blocked pressure line in an internal combustion engine SCR system, which includes a feed pump, a dosing module, a pressure sensor, and an electronic control unit, includes a reference signal of a pressure (p) in the pressure line being measured over a measuring time (tM) if a...

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Bibliographische Detailangaben
Hauptverfasser:	BRAEUER, Alexander, DENCKER, Florian
Format:	Patent
Sprache:	eng ; fre ; ger
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:	A method of detecting a blocked pressure line in an internal combustion engine SCR system, which includes a feed pump, a dosing module, a pressure sensor, and an electronic control unit, includes a reference signal of a pressure (p) in the pressure line being measured over a measuring time (tM) if a reducing agent solution is not dosed by the dosing module, and a signal energy of the reference signal is then calculated; a pressure signal being measured over the measuring time (tM) during the dosing of a dosing mass of the reducing agent solution by the dosing module; and a signal energy of the pressure signal is then calculated; a ratio of the signal energies of the pressure signal to the signal energy of the reference signal being calculated; and finally the blocked pressure line being detected if the ratio falls short of a first pre-definable threshold value.