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Wedemann, Marion ; Reiß, Sebastian ; Spörl, Matthias ; Hagen, Gunter ; Fischerauer, Gerhard ; Moos, Ralf:
Three-Way catalyst washcoat for air-to-fuel ratio sensing.
In:
Eurosensors XXII : Proceedings. -
Düsseldorf
: GMA
,
2008
. - S. 503-504
ISBN 978-3-00-025217-4
Abstract
For operating a three-way catalyst (TWC) in the maximum conversion region, the normalized air-tofuel ratio λ of the exhaust gas of gasoline operated vehicles is measured by a lambda-probe upstream of the TWC. The electrical conductivity of TWC-washcoats used today varies with the oxygen partial pressure of the atmosphere and can therefore be employed alternatively for λ-measurement.