Title data
Reiß, Sebastian ; Moos, Ralf ; Wedemann, Marion ; Spörl, Matthias ; Nerowski, Alexander ; Fischerauer, Gerhard:
RF-probing of Automotive Catalysts.
In:
Proceedings SENSOR 2009. -
Wunstorf
: AMA Verband für Sensorik und Messtechnik e.V.
,
2009
. - pp. 113-116
ISBN N 978-3-9810993-5-5
DOI: https://doi.org/10.5162/sensor09/v2/b7.1
Related URLs
Abstract in another language
In order to meet the strict emission regulations, gasoline operated vehicles are equipped with three-way catalysts (TWC) and lambda sensors are applied to control the exhaust gas aftertreatment system. Since the TWC achieves maximum conversion of hydrocarbons, carbon monoxide, and nitrogen oxides at λ ≈ 1, λ is measured by lambda-probes upstream and downstream of the catalyst and is readjusted if required (λ: normalized air-to-fuel ratio). This leads to an oscillating air-to-fuel-ratio that is damped by oxygen storage components in the washcoat of the TWC (ceria-zirconia mixed oxides). These ceria-based materials store oxygen under lean atmospheres (λ > 1) and release oxygen under rich conditions (λ < 1).
In the present contribution, aspects of a novel approach to determine the oxygen loading of a TWC by a contactless measurement and in-situ with the help of radio frequency (RF) without lambda-probes is presented.
Further data
Item Type: | Article in a book |
---|---|
Refereed: | Yes |
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: | 21 Apr 2015 07:16 |
Last Modified: | 13 Nov 2015 10:15 |
URI: | https://eref.uni-bayreuth.de/id/eprint/10491 |