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Ammonia Slip Estimation Based on ASC Control-Oriented Modelling And OBD NOx Sensor Cross-Sensitivity Analysis

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Ammonia Slip Estimation Based on ASC Control-Oriented Modelling And OBD NOx Sensor Cross-Sensitivity Analysis

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dc.contributor.author Piqueras, P. es_ES
dc.contributor.author Pla Moreno, Benjamín es_ES
dc.contributor.author Sanchis Pacheco, Enrique José es_ES
dc.contributor.author Nakaema-Aronis, André es_ES
dc.date.accessioned 2022-06-23T07:28:06Z
dc.date.available 2022-06-23T07:28:06Z
dc.date.issued 2021-10-15 es_ES
dc.identifier.isbn 978-0-7918-8551-2 es_ES
dc.identifier.uri http://hdl.handle.net/10251/183581
dc.description.abstract [EN] The incoming emission regulations for internal combustion engines are gradually introducing new pollutant species, which requires greater complexity of the exhaust gas aftertreatment systems concerning layout, control and diagnostics. This is the case of ammonia, which is already regulated in heavy-duty vehicles and to be included in the emissions standards applied to passenger cars. The ammonia is injected into the exhaust gas through urea injections for NOx abatement in selective catalytic reduction (SCR) systems and can be also generated in other aftertreatment systems as three-way catalysts. However, ammonia slip may require removal on a dedicated catalyst called ammonia slip catalyst (ASC). The set consisting of the urea injection system, SCR and ASC requires control and on-board diagnostic tools to ensure high NOx conversion efficiency and minimization of the ammonia slip under real driving conditions. These tasks are based on the use of NOx sensors ZrO2 pumping cell-based, which present as a drawback high cross-sensitivity to ammonia. Consequently, the presence of this species can affect the measurement of NOx and compromise SCR-ASC control strategies. In the present work, a methodology to predict ammonia and NOx tailpipe emissions is proposed. For this purpose, a control-oriented ASC model was developed to use its ammonia slip prediction to determine the cross-sensitivity correction of the NOx sensor placed downstream of the ASC. The model is based on a simplified solution of the transport equations of the species involved in the main ASC reactions. The ammonia slip model was calibrated using steady- and quasi-steady-state tests performed in a Euro 6c diesel engine. Finally, the performance of the proposed methodology to predict NOx and ammonia emissions was evaluated against experimental data corresponding to Worldwide harmonized Light vehicles Test Cycles (WLTC) applying different urea dosing strategies. es_ES
dc.language Inglés es_ES
dc.publisher American Society of Mechanical Engineers (ASME) es_ES
dc.relation.ispartof Proceedings of ASME 2021 Internal Combustion Engine Fall Technical Conference (ICEF2021) es_ES
dc.rights Reserva de todos los derechos es_ES
dc.subject Exhaust aftertreatment es_ES
dc.subject Ammonia slip catalyst es_ES
dc.subject NOx sensor es_ES
dc.subject OBD es_ES
dc.subject.classification MAQUINAS Y MOTORES TERMICOS es_ES
dc.title Ammonia Slip Estimation Based on ASC Control-Oriented Modelling And OBD NOx Sensor Cross-Sensitivity Analysis es_ES
dc.type Comunicación en congreso es_ES
dc.type Capítulo de libro es_ES
dc.identifier.doi 10.1115/ICEF2021-67710 es_ES
dc.rights.accessRights Abierto es_ES
dc.contributor.affiliation Universitat Politècnica de València. Departamento de Máquinas y Motores Térmicos - Departament de Màquines i Motors Tèrmics es_ES
dc.description.bibliographicCitation Piqueras, P.; Pla Moreno, B.; Sanchis Pacheco, EJ.; Nakaema-Aronis, A. (2021). Ammonia Slip Estimation Based on ASC Control-Oriented Modelling And OBD NOx Sensor Cross-Sensitivity Analysis. American Society of Mechanical Engineers (ASME). 1-12. https://doi.org/10.1115/ICEF2021-67710 es_ES
dc.description.accrualMethod S es_ES
dc.relation.conferencename ASME 2021 Internal Combustion Engine Division Fall Technical Conference (ICEF2021) es_ES
dc.relation.conferencedate Octubre 13-15,2021 es_ES
dc.relation.conferenceplace Online es_ES
dc.relation.publisherversion https://doi.org/10.1115/ICEF2021-67710 es_ES
dc.description.upvformatpinicio 1 es_ES
dc.description.upvformatpfin 12 es_ES
dc.type.version info:eu-repo/semantics/publishedVersion es_ES
dc.relation.pasarela S\450810 es_ES


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