Conductometric Soot Sensor for Automotive Exhausts: Initial Studies

Titelangaben

Hagen, Gunter ; Feistkorn, Constanze ; Wiegärtner, Sven ; Heinrich, Andreas ; Brüggemann, Dieter ; Moos, Ralf:
Conductometric Soot Sensor for Automotive Exhausts: Initial Studies.
In: Sensors. Bd. 10 (2010) Heft 3 . - S. 1589-1598.
ISSN 1424-8220
DOI: https://doi.org/10.3390/s100301589

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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.