[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 ...
Desantes Fernández, José Mª; Bermúdez, Vicente; López, J. Javier; López Pintor, Darío(Elsevier, 2016-09-01)
A new procedure to predict both high-temperature stage and cool flames ignition delays under transient
thermodynamic conditions has been developed in this paper. The results obtained have been compared
with those obtained ...
Luján, José M.; Bermúdez, Vicente; Dolz, Vicente; Monsalve-Serrano, Javier(Elsevier, 2018)
[EN] Recent investigations demonstrated that real-world emissions usually exceed the levels achieved in the laboratory based type approval processes. By means of on-board emissions measurements, it has been shown that ...
Peris Pascual, Antonio Miguel(Universitat Politècnica de València, 2020-01-28)
[ES] En la actualidad los motores diésel tienen gran importancia en la vida cotidiana ya que forman parte en una gran cantidad de equipamiento que dan servicio y son de gran utilidad para las personas. Su aplicación es muy ...
[EN] According to current worldwide trends for homologation vehicles in real driving conditions is forced to test the engines in altitude and in highly dynamic driving cycles in order to approach nowadays and next future ...
Bermúdez, Vicente; Luján, José M.; Climent, H.; Soto-Izquierdo, Lian; Campos-Navarro, Daniel(SAE International, 2018)
[EN] In order to improve performance and minimize pollutant emissions in gasoline turbocharged direct-injection (GTDi) engines, different injection strategies and technologies are being investigated. The inclusion of exhaust ...
The pressure drop across DPFs directly affects the exhaust back-pressure and fuel economy of
compression ignition engines. Pressure drop is related to the soot trapped inside the DPF, increasing
exhaust back-pressure as ...
[EN] Forthcoming directives from European Commission will force homologation in altitude to approach standards to actual driving conditions in order to reduce the gap between regulated and real-life emissions. This work ...
Bermúdez, Vicente; Serrano Cruz, José Ramón; Piqueras, P.; García Afonso, Óscar(SAGE Publications, 2011)
Diesel particulate filters (DPF) are becoming a standard technology in diesel engines because of the need for compliance with forthcoming regulations regarding soot emissions. When a great degree of maturity in management ...
[EN] The newly designed partially premixed combustion concept has demonstrated its potential to reduce nitrogen oxides
and particulate matter emissions combined with highly indicated efficiencies. However, it is highly ...
Nowadays, EGR systems are being incorporated in the research focused on spark-ignition direct-injection engines
as a solution to the problems presented by them; i.e. knock risk and high combustion temperature which produces ...
Regarding the global warming due CO2 emissions, the crude oil depletion and its corresponding rising prices, OEMs are exploring different solutions to increase the internal combustion engine efficiency, among which, the ...
Bermúdez, Vicente; Luján, José M.; Plá Moreno, Benjamín; Linares Rodríguez, Waldemar Gregorio(Elsevier, 2011-02)
In this study, regulated and unregulated gaseous emissions and fuel consumption with five different fuels were tested in a 4-cylinder, light-duty diesel EURO IV typically used for the automotive vehicles in Europe. Three ...
Desantes, J.M.; Bermúdez, Vicente; López, J. Javier; López-Pintor, Darío(Elsevier, 2017)
[EN] The ignition characteristics of six different fuels have been correlated as a function of the temperature, pressure, equivalence ratio and oxygen molar fraction in this investigation. More specifically, the ignition ...
Morón Peiró, Óscar(Universitat Politècnica de València, 2018-09-25)
[ES] Numerosos estudios han evidenciado las claras discrepancias entre las emisiones homologadas y las que se producen en condiciones de conducción real. De ahí que exista un profundo consenso por la necesidad de normativas ...
García Martínez, Elena(Universitat Politècnica de València, 2021-02-04)
[ES] El presente Trabajo Final de Máster plantea como objetivo principal desarrollar un modelo para la simulación de la reactividad química de un catalizador de oxidación de amoníaco (Ammonia Slip Catalyst, ASC). En primer ...