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Assessing the influence of boundary conditions, driving behavior and data analysis methods on real driving CO2 and NOx emissions

2019-03-25Journal article Restricted access
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dc.contributor.authorVarella, Roberto A.
dc.contributor.authorFaria, Marta
dc.contributor.authorMendoza-Villafuerte, Pablo
dc.contributor.authorBaptista, Patricia
dc.contributor.authorSousa, Luís
dc.contributor.authorDuarte, Gonçalo
dc.date.accessioned2019-02-08T09:45:49Z
dc.date.available2019-02-08T09:45:49Z
dc.date.issued2019-03-25
dc.description.abstractThe need to verify vehicle emissions in real world operation led to the implementation of Real Driving Emissions (RDE) test procedures, effective since September 2017 for new Euro 6 cars following the Commission Regulation (EU) 2016/427, which defines the RDE test conditions and data analysis methods to allow representative results. Main factors addressed by the regulation include the share of driving operation, ambient temperature range, altitude and elevation difference. However, RDE is still debatable since not only boundary conditions but also the evaluation methods and trip selection are being discussed together with a carbon dioxide (CO2) regulation, which is planned to be implemented in the short term. Thus, this work focuses on analyzing the effect of different data measurement and analysis methods (i.e. cold operation, road grade, trip selection and driving style) on CO2 and nitrogen oxides (NOx) emissions based on 13 RDE tests performed in the Lisbon Metropolitan Area, Portugal. The tests were conducted by 2 drivers using 5 vehicles. Each driver performed 2 trips per vehicle, one in normal driving and other in aggressive driving. A Portable Emissions Measurement System (PEMS) was used to collect 1 Hz data, which was compared and analyzed using the European Commission (EC) proposed method for RDE tests. Results show the effects of each parameter such as average difference between drivers (7% in CO2 and 55% in NOx emissions) and between aggressive and normal driving. For road grade, big oscillations happen during the slope profile, which impacts emissions during all trips. Considering cold-operation, CO2 and NO emissions are, on average, similar to 25% and 55% higher, respectively, than in hot-operation. These results highlight the need for deeper studies on these factors to assure that RDE tests evolve to a more established certification procedure than laboratorial certifications. (C) 2018 Elsevier BM. All rights reserved.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.citationVARELLA, Roberto A.; [et al] – Assessing the influence of boundary conditions, driving behavior and data analysis methods on real driving CO2 and NOx emissions. Science of the Total Environment. ISSN 0048-9697. Vol. 658, (2019), pp. 879-894pt_PT
dc.identifier.doi10.1016/j.scitotenv.2018.12.053pt_PT
dc.identifier.issn0048-9697
dc.identifier.issn1879-1026
dc.identifier.urihttp://hdl.handle.net/10400.21/9469
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherElsevierpt_PT
dc.relation202097/2014-5 - National Council of Scientific and Technological Development (CNPq - Brazil)pt_PT
dc.relationPD/BD/105714/2014 - FCTpt_PT
dc.relationMITP-TB/C S/0026/2013 - FCTpt_PT
dc.relation.publisherversionhttps://reader.elsevier.com/reader/sd/pii/S0048969718348939?token=E38FC643565B1FC4BDD534B36D2B5463874C980729FEDDD5A62680371210B9E1155EF479F118F67AF425B7A255CCB38Dpt_PT
dc.subjectReal driving emissionspt_PT
dc.subjectPortable emission measurement systemspt_PT
dc.subjectFuel use and emissionspt_PT
dc.subjectTesting boundary conditionspt_PT
dc.subjectData analysis methodspt_PT
dc.subjectEmissões reais de conduçãopt_PT
dc.titleAssessing the influence of boundary conditions, driving behavior and data analysis methods on real driving CO2 and NOx emissionspt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/5876/UID%2FEMS%2F50022%2F2013/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/5876/UID%2FEEA%2F50009%2F2013/PT
oaire.citation.endPage894pt_PT
oaire.citation.startPage879pt_PT
oaire.citation.titleScience of the Total Environmentpt_PT
oaire.citation.volume658pt_PT
oaire.fundingStream5876
oaire.fundingStream5876
person.familyNameFaria
person.familyNameMendoza-Villafuerte
person.familyNameBaptista
person.familyNameSousa
person.familyNameDuarte
person.givenNameMarta
person.givenNamePablo
person.givenNamePatricia
person.givenNameLuis
person.givenNameGonçalo
person.identifier.ciencia-id0D18-21FF-BD67
person.identifier.ciencia-id5414-D855-E2F5
person.identifier.ciencia-id6918-836F-646D
person.identifier.orcid0000-0002-7801-0888
person.identifier.orcid0000-0003-0980-3793
person.identifier.orcid0000-0003-1559-9151
person.identifier.orcid0000-0002-0575-4894
person.identifier.orcid0000-0002-7216-611X
person.identifier.ridA-5356-2012
person.identifier.ridI-1242-2014
person.identifier.scopus-author-id16202135300
person.identifier.scopus-author-id7004775542
person.identifier.scopus-author-id57189656488
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.nameFundação para a Ciência e a Tecnologia
project.funder.nameFundação para a Ciência e a Tecnologia
rcaap.rightsclosedAccesspt_PT
rcaap.typearticlept_PT
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