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Modelling the Influence of Different Soot Types on the Radio-Frequency-Based Load Detection of Gasoline Particulate Filters

  • Gasoline particulate filters (GPFs) are an appropriate means to meet today's emission standards. As for diesel applications, GPFs can be monitored via differential pressure sensors or using a radio-frequency approach (RF sensor). Due to largely differing soot properties and engine operating modes of gasoline compared to diesel engines (e.g., the possibility of incomplete regenerations), the behavior of both sensor systems must be investigated in detail. For this purpose, extensive measurements on engine test benches are usually required. To simplify the sensor development, a simulation model was developed using COMSOL Multiphysics((R)) that not only allowed for calculating the loading and regeneration process of GPFs under different engine operating conditions but also determined the impact on both sensor systems. To simulate the regeneration behavior of gasoline soot accurately, an oxidation model was developed. To identify the influence of different engine operating points on the sensor behavior, various samples generated at an engine test bench were examined regarding their kinetic parameters using thermogravimetric analysis. Thus, this compared the accuracy of soot mass determination using the RF sensor with the differential pressure method. By simulating a typical driving condition with incomplete regenerations, the effects of the soot kinetics on sensor accuracy was demonstrated exemplarily. Thereby, the RF sensor showed an overall smaller mass determination error, as well as a lower dependence on the soot kinetics.

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Metadaten
Author:Stefanie WalterORCiD, Peter SchwanzerORCiD, Gunter Hagen, Gerhard Haft, Hans-Peter Rabl, Markus Dietrich, Ralf Moos
DOI:https://doi.org/10.3390/s20092659
Parent Title (English):Sensors
Publisher:MDPI
Document Type:Article
Language:English
Year of first Publication:2020
Release Date:2022/01/31
Tag:EMISSIONS; FLOW; PRESSURE-DROP; REGENERATION; STORAGE; diesel particulate filter (DPF); finite element method (FEM); gasoline particulate filter (GPF); radio frequency (RF); soot mass determination
Volume:20
Issue:9
Article Number:2659
First Page:1
Last Page:19
Institutes:Fakultät Maschinenbau
Fakultät Maschinenbau / Combustion Engines and Emissions Control Laboratory (CEEC)
Begutachtungsstatus:peer-reviewed
OpenAccess Publikationsweg:Gold Open Access- Erstveröffentlichung in einem/als Open-Access-Medium
research focus:Sensorik
Licence (German):Creative Commons - CC BY - Namensnennung 4.0 International