González Domínguez, David(Universitat Politècnica de València, 2020-12-21)
[ES] Hoy en día, las empresas del sector de la automoción se encuentran en una atmósfera cada vez más competitiva, dado que su actividad está liderada por una combinación de reducción de costes, tecnología más compleja, ...
l probes in turbocharged diesel engines are usually located downstream of the turbine, exhibiting a good dynamic
response but a significant delay because of the exhaust line transport and the hardware itself. With the ...
Patouna, Stavroula(Universitat Politècnica de València, 2012-02-17)
In Diesel engines, the internal flow characteristics in the fuel injection nozzles, such as the
turbulence level and distribution, the cavitation pattern and the velocity profile affect significantly the air-fuel mixture ...
F. Payri; Luján, José M.; Guardiola, Carlos; Plá Moreno, Benjamín(EDP Sciences, 2015)
[FR] Un challenge pour le futur du moteur a` combustion interne : nouvelles technologies et ro¿le
du contro¿le moteur ¿ Les nouvelles normes sur les e¿missions, en particulier le CO2, pourraient
re¿duire l¿utilisation ...
[EN] Growing awareness about CO2 emissions and their environmental implications are leading to an increase in the importance of thermal efficiency as criteria to design internal combustion engines (ICE). Heat transfer to ...
García-Oliver, José M; Margot , Xandra; Chávez Cobo, Mariany de Jesús; Karlsson, A(PERGAMON-ELSEVIER SCIENCE LTD, 2011)
[EN] A 1D3D-CFD coupled spray model is proposed in this work for the simulation of Diesel sprays under non-evaporative conditions and constant injection velocity in time. The basic idea of the model is to reduce the poor ...
[EN] Ideal models provide the simplest way to reproduce internal combustion engine (ICE) cycles, but they usually do not represent with sufficient accuracy the actual behaviour of an ICE. A suitable alternative for research ...
Carreño Arango, Ricardo(Universitat Politècnica de València, 2016-11-02)
[EN] The main objective of this doctoral thesis is the development of a comprehensive methodology to perform and analyse the thermal balance of reciprocating engines, based on experimental and theoretical techniques. ...
[EN] Control strategies such as variations in injection pressure and timing have been used by researchers to reduce in-cylinder exhaust emissions and meet legislation standards. Postinjection has been studied for several ...
Pandal-Blanco, Adrián; García-Oliver, José M; Novella Rosa, Ricardo; Pastor Enguídanos, José Manuel(Elsevier, 2018)
[EN] An implementation and validation of the coupled Sigma-gamma ADF model is presented in this work for reacting Diesel spray CFD simulations under a RANS turbulence modeling approach. An Approximated Diffusion Flamelet ...
Benajes, Jesús; Novella Rosa, Ricardo; Pastor Enguídanos, José Manuel; Hernández-López, A.; Duverger, T.(Elsevier, 2017-11-01)
[EN] Research on combustion systems for Internal Combustion Engines (ICE) is guided by the necessity of improving
engine efficiency while achieving the pollutant regulations. In this framework, this study identifies and ...
Wilczynski, Daniel(Universitat Politècnica de València, 2017-09-26)
El trabajo consiste en la utilización de la mecánica de fluidos computacional (CFD) para el análisis, diseño y optimización de sistemas de atenuación de la vorticidad (swirl) para su instalación en instalaciones de ensayo ...
Molina, Santiago; Salvador Rubio, Francisco Javier; Carreres Talens, Marcos; Jaramillo, D.(Elsevier, 2014-03)
In this paper a computational study was carried out in order to investigate the influence of the use of elliptical orifices on the inner nozzle flow and cavitation development. With this aim, a large number of injection ...
Guardiola, Carlos; Plá Moreno, Benjamín; Blanco-Rodriguez, David; Eriksson, L.(International Federation of Automatic Control (IFAC), 2013-11)
No-x estimation in diesel engines is an up-to-date problem but still some issues need to be solved. Raw sensor signals are not fast enough for real-time use while control-oriented models suffer from drift and aging. A ...
Salvador Iborra, Josep(Universitat Politècnica de València, 2020-09-02)
[EN] Current challenges in research and development of powertrains demand new computational tools capable of simulating vehicle operation under very diverse conditions. This is due, among other reasons, to new homologation ...
Payri González, Francisco; Payri, Raul; Salvador Rubio, Francisco Javier; Martínez López, Jorge(Elsevier, 2012-04-15)
In this paper a combined experimental and computational study was carried out in order to assess the ability of a homogeneous equilibrium model in predicting the experimental behaviour observed from the hydraulical ...
Burgos Moreno, Luna(Universitat Politècnica de València, 2020-05-05)
[ES] Esta tesis considera el impacto de los fallos en términos del efecto que estos tienen en el valor del sistema. Se desarrolla un modelo analítico que cuantifica el valor neto actual del sistema bajo unas condiciones ...
Estrela Colomina, María Eugenia(Universitat Politècnica de València, 2020-09-25)
[ES] El trabajo se centrará en el diseño conceptual y la evaluación de actuaciones de configuraciones de aeronaves híbridas-eléctricas. Análisis convencionales de restricciones y misión se integrarán con un modelo de planta ...
It has lately been demonstrated that the resonance of the in-cylinder pressure may be
used for inferring the trapped mass in an internal combustion engine. The resonance
frequency changes over time as the expansion stroke ...
[EN] The increasingly stringent emissions regulations and the climatic change as consequence of green house gases emissions have moved the research interest towards the optimization of the internal combustion engine. Hence, ...