Volkswagen Ag

Dimitri Illarionov

Christian Steinbrecher

Lars Stratmann

Lea Maria Lamminger

A method for monitoring a particulate filter in an exhaust system of an internal combustion engine. A loading of the particulate filter is determined by a differential pressure measurement between the inlet of the particulate filter and the outlet of the particulate filter. A loading of the particulate filter is modeled by a soot loading model for the particulate filter. A regeneration of the particulate filter is initiated and the particle removal is compared from the particulate filter determined through the differential pressure measurement with the particle removal modeled by the soot loading model. A fault message is initiated if a difference between the calculated particle removal and the measured particle removal exceeds a threshold value. An internal combustion engine having a control unit and an exhaust system for carrying out such a method are also provided.

Method for monitoring a regeneration of a particulate filter in the exhaust system of an internal combustion engine

Regeneration monitoring of a particulate filter in an exhaust gas system of an internal combustion engine of a motor vehicle. Different soot loading stages for the particulate filter are defined. A soot loading of the particulate filter is determined by use of a soot loading model. A soot loading of the particulate filter via a differential pressure measurement across the particulate filter is determined. A regeneration of the particulate filter is initiated when a certain soot loading stage of the particulate filter is reached. A soot discharge from the particulate filter is compared, expected via the soot loading model, to a soot discharge from the particulate filter that is determined via a differential pressure measurement. An error message is outputted when a regeneration stage of the particulate filter, determined by the soot loading model, does not correlate with a regeneration stage that is determined via the differential pressure measurement.

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Neuburg an der Donau, Germany

Dimitri Illarionov