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Reiß, Sebastian ; Wedemann, Marion ; Spörl, Matthias ; Fischerauer, Gerhard ; Moos, Ralf:
Effects of H₂O, CO₂, CO, and flow rates on the RF-based monitoring of three-way catalysts.
In: Sensor Letters.
Bd. 9
(2011)
Heft 1
.
- S. 316-320.
ISSN 1546-198X
DOI: https://doi.org/10.1166/sl.2011.1472
Volltext
Angaben zu Projekten
| Projekttitel: |
Offizieller Projekttitel Projekt-ID Ohne Angabe MO 1060/6-1 Ohne Angabe FI 956/3-1 |
|---|---|
| Projektfinanzierung: |
Deutsche Forschungsgemeinschaft |
Abstract
At the moment, the operating conditions for best conversion of limited emissions of gasoline engines are controlled by lambda probes upstream and downstream of the three-way catalyst. Their signals are the basis for complex oxygen loading models of the catalyst. A novel approach is to directly determine the catalyst state without lambda probes via a contactless monitoring system based on the interaction of electromagnetic waves with the catalyst. We could show previously that the resonance frequencies of the catalyst-filled housing are strongly correlated with the oxygen loading of the catalyst. In this study, it is shown that cross-effects of water, carbon monoxide, carbon dioxide, and gas flow rate can be neglected.