[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 ...
Bermúdez, Vicente; Serrano, J.R.; Piqueras, P.; García Afonso, Óscar(SAGE Publications (UK and US), 2013-08)
Diesel particulate filters are the most useful technology to reduce particulate matter from the exhaust gas of internal combustion engines. Although these devices have suffered an intense development in terms of the ...
[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 ...
[EN] This research/article aimed to analyze the influence of an after-treatment system (ATS) on emissions of a heavy-duty
spark-ignition (HD-SI) engine fueled with liquified petroleum gas (LPG), in the context of current ...
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 ...
Conde Pabón, Brayan Yessid(Universitat Politècnica de València, 2021-12-08)
[ES] El principal objetivo de este trabajo consiste en analizar el rendimiento de un sistema de postratamiento, compuesto por un catalizador de tres vías (TWC) y un filtro de partículas (PF). Dispositivos empleados en el ...
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 ...
[EN] This study investigates the effects of varying Liquefied Petroleum Gas compositions on pollutant emissions and three-way catalyst performance in retrofitted heavy-duty spark-ignition engines. It focuses on fuels with ...
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 ...
[EN] Although there are already several works where the influence of injection parameters on exhaust emissions, and specifically on particulate matter emissions, in diesel engines has been evaluated, the diversity in the ...