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Overview of the status of the automotive catalyst state diagnosis using microwave-based techniques

Title data

Moos, Ralf:
Overview of the status of the automotive catalyst state diagnosis using microwave-based techniques.
2012
Event: E-COSM’12, IFAC Workshop on Engine and Powertrain Control, Simulation and Modeling , October 23-25, 2012 , Rueil-Malmaison, France.
(Conference item: Conference , Other Presentation type)

Abstract in another language

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.

Further data

Item Type: Conference item (Other)
Refereed: Yes
Additional notes: Invited Talk
Institutions of the University: Faculties > Faculty of Engineering Science
Faculties > Faculty of Engineering Science > Chair Functional Materials > Chair Functional Materials - Univ.-Prof. Dr.-Ing. Ralf Moos
Faculties
Faculties > Faculty of Engineering Science > Chair Functional Materials
Profile Fields > Advanced Fields > Advanced Materials
Research Institutions > Research Centres > Bayreuth Center for Material Science and Engineering - BayMAT
Profile Fields
Profile Fields > Advanced Fields
Research Institutions
Research Institutions > Research Centres
Result of work at the UBT: Yes
DDC Subjects: 600 Technology, medicine, applied sciences > 620 Engineering
Date Deposited: 18 May 2015 08:41
Last Modified: 14 Apr 2016 06:40
URI: https://eref.uni-bayreuth.de/id/eprint/13604