Method for thermal rejuvenation of resistive soot sensor utilized for monitoring particulate filter of diesel car, involves thermally rejuvenating soot sensor by removing matured soot particles, when soot concentration exceeds preset load

The method involves forming an electrical isolating portion of an electrical isolating body between measuring electrodes of a soot sensor so that soot particles settle between the measuring electrodes to enable a current flow between the measuring electrodes. The current flow is evaluated as a measu...

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Bibliographic Details
Main Authors WEIGL, MANFRED, WILDGEN, ANDREAS, REITMEIER, WILLIBALD
Format Patent
LanguageEnglish
German
Published 20.06.2013
Subjects
BLASTING
COMBUSTION ENGINES
CONTROLLING COMBUSTION ENGINES
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
HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES
LIGHTING
MACHINES OR ENGINES IN GENERAL
MEASURING
MECHANICAL ENGINEERING
PHYSICS
STEAM ENGINES
TESTING
WEAPONS
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Summary:The method involves forming an electrical isolating portion of an electrical isolating body between measuring electrodes of a soot sensor so that soot particles settle between the measuring electrodes to enable a current flow between the measuring electrodes. The current flow is evaluated as a measure for soot concentration. The soot sensor is thermally rejuvenation by removing matured soot particles by guiding high voltage at locations of the matured soot particles to burn the soot particles, when the soot concentration exceeds a preset soot load. Es wird ein Verfahren zum Regenerieren eines zur Erfassung von Rußpartikeln in einem Gasstrom dienenden resistiven Rußsensors beschrieben. Der Rußsensor wird dabei derart regeneriert, dass die zwischen den Messelektroden abgelagerten Rußpartikel durch Funkenerosion entfernt werden, indem eine an die Stellen der abgelagerten Rußpartikel zur Funkenerosion führende Hochspannung an die Messelektroden des Rußsensors gelegt wird. Auf diese Weise lassen sich die abgelagerten Rußpartikel wesentlich schneller entfernen als bei herkömmlichen thermischen Verfahren, bei denen der gesamte Rußsensor erhitzt wird.
Bibliography:Application Number: DE20111089299