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Conductometric Soot Sensor for Automotive Exhausts: Initial Studies

2010; Multidisciplinary Digital Publishing Institute; Volume: 10; Issue: 3 Linguagem: Inglês

10.3390/s100301589

1424-8220

Gunter Hagen, Constanze Feistkorn, Sven Wiegärtner, Andreas J. Heinrich, Dieter Brüggemann, Ralf Moos,

Vehicle emissions and performance

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.