Articles | Volume 4, issue 2
J. Sens. Sens. Syst., 4, 255–262, 2015
https://doi.org/10.5194/jsss-4-255-2015

Special issue: Sensor/IRS2 2015

J. Sens. Sens. Syst., 4, 255–262, 2015
https://doi.org/10.5194/jsss-4-255-2015

Regular research article 10 Aug 2015

Regular research article | 10 Aug 2015

State determination of catalytic converters based on an ultra-wideband communication system

I. Motroniuk, R. Stöber, and G. Fischerauer I. Motroniuk et al.
  • Bayreuth Engine Research Center (BERC), Universität Bayreuth, Bayreuth, Germany

Abstract. A novel microwave-based approach for monitoring the state of aftertreatment systems such as diesel particulate filters (DPFs), three-way catalytic converters (TWCs), and selective catalytic reduction (SCR) catalysts is proposed. The volume inside the metallic housing of the DPF, TWC, or SCR is considered as a wireless communication channel between two terminals of a communication system. It is shown that, depending on the transmission channel characteristics, the properties of the catalyst, such as the catalyst state, can be inferred. This is done by means of an ultra-wideband (UWB) measurement and the subsequent evaluation and processing of the waveform in the time and frequency domains.

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A novel microwave-based approach for monitoring the state of aftertreatment systems such as diesel particulate filters (DPFs), three-way catalytic converters (TWCs), and selective catalytic reduction (SCR) catalysts is proposed. The interior of the catalyst metal housing serves as a communication channel between two wireless communication nodes. It is shown that, depending on the transmission channel characteristics, the properties of the catalyst, such as the catalyst state, can be inferred.
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