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Swirl ratio and post injection strategies to improve late cycle diffusion combustion in a light-duty diesel engine

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Swirl ratio and post injection strategies to improve late cycle diffusion combustion in a light-duty diesel engine

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dc.contributor.author Benajes, Jesús es_ES
dc.contributor.author Martín, J. es_ES
dc.contributor.author García Martínez, Antonio es_ES
dc.contributor.author Villalta-Lara, David es_ES
dc.contributor.author Warey, Alok es_ES
dc.date.accessioned 2018-06-11T04:22:14Z
dc.date.available 2018-06-11T04:22:14Z
dc.date.issued 2017 es_ES
dc.identifier.issn 1359-4311 es_ES
dc.identifier.uri http://hdl.handle.net/10251/103765
dc.description.abstract [EN] Nitrogen oxides (NOx) and soot emissions are the most important pollutants from direct-injection diesel engines. In particular, soot formation and oxidation determine the net engine-out soot emissions. These phenomena are complex and competing processes during diesel combustion. Despite many researches implicate the mechanisms of soot formation with soot emissions, the enhancement of the late cycle soot oxidation is the dominant mechanism for a reduction of engine-out soot emissions. The mixing process and the in-cylinder bulk temperature are two important parameters in the development of soot oxidation process. The current research compares different engine strategies to enhance the late cycle mixing controlled combustion process and therefore enhance soot oxidation while maintaining similar gross indicated efficiency in a light-duty engine. For this purpose, a simplified methodology has been used, which analyzes the effect of mixing process and in-cylinder bulk gas temperature on soot oxidation during the late cycle combustion. For carrying out this research, theoretical and experimental tools were used. In particular, the experimental measurements were made in a single-cylinder direct-injection light-duty diesel engine varying the swirl ratio and the injection pattern as injection pressure, Start of Energizing (SoE), Energizing Time (ET) and number of injections events. To analyze soot emissions, the combustion luminosity was measured by an optoelectronic probe and the optical thickness parameter (KL) was evaluated by the two-color pyrometry method. The apparent combustion time (ACT-1) was used as mixing time tracer. Results show that an increase in swirl ratio implies an improvement on the mixing process and higher values of average bulk temperature during the late-cycle diffusion combustion. Both phenomena produce an enhancement in the soot oxidation process. In the lowest swirl ratio case, a suitable injection strategy based on multiple injections, provides similar results of soot oxidation process (and therefore, the emissions) as high swirl ratio case. (C) 2017 Elsevier Ltd. All rights reserved. es_ES
dc.language Inglés es_ES
dc.publisher Elsevier es_ES
dc.relation.ispartof Applied Thermal Engineering es_ES
dc.rights Reconocimiento - No comercial - Sin obra derivada (by-nc-nd) es_ES
dc.subject.classification MAQUINAS Y MOTORES TERMICOS es_ES
dc.title Swirl ratio and post injection strategies to improve late cycle diffusion combustion in a light-duty diesel engine es_ES
dc.type Artículo es_ES
dc.identifier.doi 10.1016/j.applthermaleng.2017.05.101 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 Benajes, J.; Martín, J.; García Martínez, A.; Villalta-Lara, D.; Warey, A. (2017). Swirl ratio and post injection strategies to improve late cycle diffusion combustion in a light-duty diesel engine. Applied Thermal Engineering. 123:365-376. doi:10.1016/j.applthermaleng.2017.05.101 es_ES
dc.description.accrualMethod S es_ES
dc.relation.publisherversion https://doi.org/10.1016/j.applthermaleng.2017.05.101 es_ES
dc.description.upvformatpinicio 365 es_ES
dc.description.upvformatpfin 376 es_ES
dc.type.version info:eu repo/semantics/publishedVersion es_ES
dc.description.volume 123 es_ES
dc.relation.pasarela 338065 es_ES


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