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Experimental study of the relationship between injection rate shape and Diesel ignition using a novel piezo-actuated direct-acting injector

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Experimental study of the relationship between injection rate shape and Diesel ignition using a novel piezo-actuated direct-acting injector

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dc.contributor.author Macian Martinez, Vicente es_ES
dc.contributor.author Payri Marín, Raúl es_ES
dc.contributor.author Ruiz Rosales, Santiago es_ES
dc.contributor.author Bardi, Michele es_ES
dc.contributor.author Plazas, Alejandro H. es_ES
dc.date.accessioned 2015-04-27T11:39:32Z
dc.date.available 2015-04-27T11:39:32Z
dc.date.issued 2014-04-01
dc.identifier.issn 0306-2619
dc.identifier.uri http://hdl.handle.net/10251/49297
dc.description.abstract Injection rate shaping is one of the most attractive alternatives to multiple injection strategies; however, its implementation has been for long time impeded by limitations in the injector technology and therefore, the experimental information available in the literature about this topic is lacking. In this work, a novel prototype common-rail injector featuring direct control of the nozzle needle by means of a piezo-stack (direct-acting) allowed a fully flexible control on the nozzle needle movement and enabled the implementation of alternative injection rate shapes typologies. This state of the art injector, fitted with a 7-hole nozzle, was tested at real engine conditions studying the spatial-temporal evolution of CH* and OH* chemiluminescence intensity produced by the fuel combustion. A wide test matrix was performed in an optically accessible hot-spray test rig to understand the influence that partial needle lift and alternative injection rate shapes have on the Diesel ignition The results showed that alternative injection rate profiles have a substantial impact on the ignition event affecting the premixed phase of the combustion and the location where the ignition takes place. Moreover, the results proved that the modifications in the internal flow caused by the partial needle lift are reflected on the ignition timing: although partial needle lift and injection pressure have similar effects on the mass flow rate, in the first case, the ignition delay is reduced, while in the second, the combustion is delayed as a consequence of a different spray development. es_ES
dc.description.sponsorship This work was sponsored by General Motors R&D, Warren, MI. The authors would like to thank Jose Enrique del Rey, Moises Ferrandez Hermosilla and Juan Pablo Viera for their precious help in the laboratory during the tests. en_EN
dc.language Inglés es_ES
dc.publisher Elsevier es_ES
dc.relation.ispartof Applied Energy es_ES
dc.rights Reserva de todos los derechos es_ES
dc.subject Rate-shaping es_ES
dc.subject Direct-acting es_ES
dc.subject Diesel ignition es_ES
dc.subject Partial needle-lift es_ES
dc.subject Chemiluminescence es_ES
dc.subject.classification MAQUINAS Y MOTORES TERMICOS es_ES
dc.title Experimental study of the relationship between injection rate shape and Diesel ignition using a novel piezo-actuated direct-acting injector es_ES
dc.type Artículo es_ES
dc.identifier.doi 10.1016/j.apenergy.2013.12.025
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.contributor.affiliation Universitat Politècnica de València. Instituto Universitario CMT-Motores Térmicos - Institut Universitari CMT-Motors Tèrmics es_ES
dc.description.bibliographicCitation Macian Martinez, V.; Payri Marín, R.; Ruiz Rosales, S.; Bardi, M.; Plazas, AH. (2014). Experimental study of the relationship between injection rate shape and Diesel ignition using a novel piezo-actuated direct-acting injector. Applied Energy. 118:100-113. doi:10.1016/j.apenergy.2013.12.025 es_ES
dc.description.accrualMethod S es_ES
dc.relation.publisherversion http://dx.doi.org/10.1016/j.apenergy.2013.12.025 es_ES
dc.description.upvformatpinicio 100 es_ES
dc.description.upvformatpfin 113 es_ES
dc.type.version info:eu-repo/semantics/publishedVersion es_ES
dc.description.volume 118 es_ES
dc.relation.senia 279132
dc.contributor.funder General Motors Corporation es_ES


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