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Conductometric Sensor for Soot Mass Flow Detection in Exhausts of Internal Combustion Engines

Authors :
Markus Feulner
Gunter Hagen
Andreas Müller
Andreas Schott
Christian Zöllner
Dieter Brüggemann
Ralf Moos
Source :
Sensors, Vol 15, Iss 11, Pp 28796-28806 (2015)
Publication Year :
2015
Publisher :
MDPI AG, 2015.

Abstract

Soot sensors are required for on-board diagnostics (OBD) of automotive diesel particulate filters (DPF) to detect filter failures. Widely used for this purpose are conductometric sensors, measuring an electrical current or resistance between two electrodes. Soot particles deposit on the electrodes, which leads to an increase in current or decrease in resistance. If installed upstream of a DPF, the “engine-out” soot emissions can also be determined directly by soot sensors. Sensors were characterized in diesel engine real exhausts under varying operation conditions and with two different kinds of diesel fuel. The sensor signal was correlated to the actual soot mass and particle number, measured with an SMPS. Sensor data and soot analytics (SMPS) agreed very well, an impressing linear correlation in a double logarithmic representation was found. This behavior was even independent of the used engine settings or of the biodiesel content.

Details

Language :
English
ISSN :
14248220
Volume :
15
Issue :
11
Database :
Directory of Open Access Journals
Journal :
Sensors
Publication Type :
Academic Journal
Accession number :
edsdoj.22b77367a54aac83b1d68cd2a77cd5
Document Type :
article
Full Text :
https://doi.org/10.3390/s151128796