Optimization of soot deposition by high-temperature prepolarization of a resistive particulate matter sensor
<p>For the purposes of the onboard diagnosis (OBD) of diesel particulate filters (DPFs) in diesel exhaust treatment systems, a particulate matter (PM) sensor is applied downstream from the DPFs to detect small amounts of diesel soot that passed through the filter. The state-of-the-art technolo...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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Copernicus Publications
2020-08-01
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| Series: | Journal of Sensors and Sensor Systems |
| Online Access: | https://jsss.copernicus.org/articles/9/263/2020/jsss-9-263-2020.pdf |
| _version_ | 1818292196783161344 |
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| author | J. Ebel J. Ebel C. Schilling H. Fritze |
| author_facet | J. Ebel J. Ebel C. Schilling H. Fritze |
| author_sort | J. Ebel |
| collection | DOAJ |
| description | <p>For the purposes of the onboard diagnosis (OBD) of diesel particulate
filters (DPFs) in diesel exhaust treatment systems, a particulate matter
(PM) sensor is applied downstream from the DPFs to detect small amounts of
diesel soot that passed through the filter. The state-of-the-art technology is a sensor based on the resistive measurement principle, i.e., charged soot particles are attracted by electrophoretic forces, deposited on an interdigital electrode (IDE) structure and conductive soot bridges that reduce the overall resistance are formed. This paper reports
how the response time of a resistively working particulate matter sensor can be
shortened up to 30 <span class="inline-formula">%</span> by the optimization of soot deposition
that is initiated by a change in the sensor operation strategy. The
measurement voltage is applied for prepolarization during the sensor regeneration phase rather than during the cooling phase before the
measurement is commonly done. Experiments were performed at diesel
engine test benches to examine this context and simulations of
the electric field above and below the IDE structure. The data are used
to deduct a model, including the solid state chemistry of the sensor's
ceramic materials, the effect of impurities on the electric field
properties and the interconnection with the soot deposition, which
defines the sensor's response.</p> |
| first_indexed | 2024-12-13T02:56:07Z |
| format | Article |
| id | doaj.art-328d18d5d57f4e23b65f3ee08f1d36a8 |
| institution | Directory Open Access Journal |
| issn | 2194-8771 2194-878X |
| language | English |
| last_indexed | 2024-12-13T02:56:07Z |
| publishDate | 2020-08-01 |
| publisher | Copernicus Publications |
| record_format | Article |
| series | Journal of Sensors and Sensor Systems |
| spelling | doaj.art-328d18d5d57f4e23b65f3ee08f1d36a82022-12-22T00:01:56ZengCopernicus PublicationsJournal of Sensors and Sensor Systems2194-87712194-878X2020-08-01926327110.5194/jsss-9-263-2020Optimization of soot deposition by high-temperature prepolarization of a resistive particulate matter sensorJ. Ebel0J. Ebel1C. Schilling2H. Fritze3Robert Bosch GmbH, Stuttgart, GermanyInstitute of Energy Research and Physical Technologies, Clausthal University of Technology, Goslar, GermanyRobert Bosch GmbH, Stuttgart, GermanyInstitute of Energy Research and Physical Technologies, Clausthal University of Technology, Goslar, Germany<p>For the purposes of the onboard diagnosis (OBD) of diesel particulate filters (DPFs) in diesel exhaust treatment systems, a particulate matter (PM) sensor is applied downstream from the DPFs to detect small amounts of diesel soot that passed through the filter. The state-of-the-art technology is a sensor based on the resistive measurement principle, i.e., charged soot particles are attracted by electrophoretic forces, deposited on an interdigital electrode (IDE) structure and conductive soot bridges that reduce the overall resistance are formed. This paper reports how the response time of a resistively working particulate matter sensor can be shortened up to 30 <span class="inline-formula">%</span> by the optimization of soot deposition that is initiated by a change in the sensor operation strategy. The measurement voltage is applied for prepolarization during the sensor regeneration phase rather than during the cooling phase before the measurement is commonly done. Experiments were performed at diesel engine test benches to examine this context and simulations of the electric field above and below the IDE structure. The data are used to deduct a model, including the solid state chemistry of the sensor's ceramic materials, the effect of impurities on the electric field properties and the interconnection with the soot deposition, which defines the sensor's response.</p>https://jsss.copernicus.org/articles/9/263/2020/jsss-9-263-2020.pdf |
| spellingShingle | J. Ebel J. Ebel C. Schilling H. Fritze Optimization of soot deposition by high-temperature prepolarization of a resistive particulate matter sensor Journal of Sensors and Sensor Systems |
| title | Optimization of soot deposition by high-temperature prepolarization of a resistive particulate matter sensor |
| title_full | Optimization of soot deposition by high-temperature prepolarization of a resistive particulate matter sensor |
| title_fullStr | Optimization of soot deposition by high-temperature prepolarization of a resistive particulate matter sensor |
| title_full_unstemmed | Optimization of soot deposition by high-temperature prepolarization of a resistive particulate matter sensor |
| title_short | Optimization of soot deposition by high-temperature prepolarization of a resistive particulate matter sensor |
| title_sort | optimization of soot deposition by high temperature prepolarization of a resistive particulate matter sensor |
| url | https://jsss.copernicus.org/articles/9/263/2020/jsss-9-263-2020.pdf |
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