Capacitive Soot Sensor. (2015)

• Record Type: Journal Article
• Authors: Hagen, G.; Rieß, G.; Schubert, M.; Feulner, M.; Müller, A.; Brüggemann, D.; Moos, R.
• Is Part Of: Procedia engineering. Volume 120(2015)
• Page Start: 241
• Page End: 244
• Publication Date: 2015
• Subjects: Aerosol-deposition-method (ADM) -- interdigital electrodes -- real exhaust test -- dosimeter-type sensor -- on-board diagnostics (OBD); Engineering -- Congresses; Engineering -- Periodicals; Engineering; Conference proceedings; Periodicals; 620.005
• DOI: 10.1016/j.proeng.2015.08.590
• Languages: English
• ISSNs: 1877-7058

Abstract

Abstract: A capacitive soot sensor was built up on basis of a known resistive device by covering the electrode area with a thin but dense alumina layer manufactured by the aerosol-deposition-method (ADM). Deposited soot cannot short-circuit the electrodes but leads to an increasing capacitance of the sensor. Experiments were conducted in real exhaust. Increasing soot concentrations lead to a more fast and sharp increase of the capacitance and the blind time of the sensor decreased to almost zero. The performance of such sensors could be enhanced when a voltage is applied at the electrodes during soot collection.