title: Conductometric soot sensor for automotive exhausts: initial studies.
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.
authors.affiliation: Functional Materials, Bayreuth Engine Research Center (BERC), University of Bayreuth, 95440 Bayreuth, Germany. gunter.hagen@uni-bayreuth.de
authors.forename: Gunter
authors.initials: G
authors.lastname: Hagen
authors.forename: Constanze
authors.initials: C
authors.lastname: Feistkorn
authors.forename: Sven
authors.initials: S
authors.lastname: Wiegärtner
authors.forename: Andreas
authors.initials: A
authors.lastname: Heinrich
authors.forename: Dieter
authors.initials: D
authors.lastname: Brüggemann
authors.forename: Ralf
authors.initials: R
authors.lastname: Moos
mesh_terms: D001336:Automobiles; D003217:Conductometry / Q000295:instrumentation* / Q000379:methods; D004566:Electrodes; D005374:Filtration; D052638:Particulate Matter / Q000032:analysis*; D053260:Soot / Q000032:analysis*; D001335:Vehicle Emissions / Q000032:analysis*
chemical_list: D052638:Particulate Matter; D053260:Soot; D001335:Vehicle Emissions