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Moos, Ralf:
Overview of the status of the automotive catalyst state diagnosis using microwave-based techniques.
2012
Veranstaltung: E-COSM’12, IFAC Workshop on Engine and Powertrain Control, Simulation and Modeling
, October 23-25, 2012
, Rueil-Malmaison, France.
(Veranstaltungsbeitrag: Kongress/Konferenz/Symposium/Tagung
,
Sonstige
Präsentationstyp)
Abstract
The state of automotive catalysts plays a key role in exhaust gas aftertreatment. The soot or ash loading of Diesel particulate filters, the oxygen loading degree in three-way catalysts, the amount of stored ammonia in SCR catalysts, or the NOx loading degree in lean NOx traps are important parameters that are today determined indirectly and model-based utilizing gas sensors installed up- or downstream of the catalysts. This contribution gives an overview on a novel approach to determine the catalyst state directly by a microwave-based technique. For that purpose, the catalyst housing serves as a cavity resonator. As “sensing” element, one or two simple antennas are mounted in the catalyst canning. The electrical properties of the catalyst device (ceramic honeycomb incl. coating and storage material) can be measured. Preferably, the resonance behavior, e.g. the resonance frequency of the reflection coefficients is observed. Such contactless-obtained information is very well correlated with the catalyst state as will be demonstrated for different exhaust gas aftertreatment systems.
Weitere Angaben
| Publikationsform: | Veranstaltungsbeitrag (Sonstige) |
|---|---|
| Begutachteter Beitrag: | Ja |
| Zusätzliche Informationen: | Invited Talk |
| Institutionen der Universität: | Fakultäten > Fakultät für Ingenieurwissenschaften Fakultäten > Fakultät für Ingenieurwissenschaften > Lehrstuhl Funktionsmaterialien > Lehrstuhl Funktionsmaterialien - Univ.-Prof. Dr.-Ing. Ralf Moos Fakultäten Fakultäten > Fakultät für Ingenieurwissenschaften > Lehrstuhl Funktionsmaterialien Profilfelder > Advanced Fields > Neue Materialien Forschungseinrichtungen > Forschungszentren > Bayreuther Materialzentrum - BayMAT Profilfelder Profilfelder > Advanced Fields Forschungseinrichtungen Forschungseinrichtungen > Forschungszentren |
| Titel an der UBT entstanden: | Ja |
| Themengebiete aus DDC: | 600 Technik, Medizin, angewandte Wissenschaften > 620 Ingenieurwissenschaften |
| Eingestellt am: | 18 Mai 2015 08:41 |
| Letzte Änderung: | 14 Apr 2016 06:40 |
| URI: | https://eref.uni-bayreuth.de/id/eprint/13604 |