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Sensors 2010, 10(3), 1589-1598; doi:10.3390/s100301589
Article

Conductometric Soot Sensor for Automotive Exhausts: Initial Studies

1,* , 1, 1, 1,2, 2
 and
1
1 Functional Materials, Bayreuth Engine Research Center (BERC), University of Bayreuth, 95440 Bayreuth, Germany 2 Engineering Thermodynamics and Transport Processes, Bayreuth Engine Research Center (BERC), University of Bayreuth, 95440 Bayreuth, Germany
* Author to whom correspondence should be addressed.
Received: 14 January 2010 / Revised: 3 February 2010 / Accepted: 22 February 2010 / Published: 1 March 2010
(This article belongs to the Section Chemical Sensors)
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Abstract

In order to reduce the tailpipe particulate matter emissions of Diesel engines, Diesel particulate filters (DPFs) are commonly used. Initial studies using a conductometric soot sensor to monitor their filtering efficiency, i.e., to detect a malfunction of the DPF, are presented. The sensors consist of a planar substrate equipped with electrodes on one side and with a heater on the other. It is shown that at constant speed-load points, the time until soot percolation occurs or the resistance itself are reproducible means that can be well correlated with the filtering efficiency of a DPF. It is suggested to use such a sensor setup for the detection of a DPF malfunction.
Keywords: on-board diagnosis (OBD); diesel particulate filter (DPF); emission legislation; diesel particulate matter (PM) on-board diagnosis (OBD); diesel particulate filter (DPF); emission legislation; diesel particulate matter (PM)
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).
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Hagen, G.; Feistkorn, C.; Wiegärtner, S.; Heinrich, A.; Brüggemann, D.; Moos, R. Conductometric Soot Sensor for Automotive Exhausts: Initial Studies. Sensors 2010, 10, 1589-1598.

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