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Mostrando ítems 1-11 de 11

An experimental study of gasoline effects on injection rate, momentum flux and spray characteristics using a common rail diesel injection system

Payri, Raul; García Martínez, Antonio; Domenech Llopis, Vicente; Durrett, Russell; Plazas, Alejandro H. (Elsevier, 2012-07)

A comparative study using diesel fuel and gasoline has been conducted focusing on the injection process. In this paper an experimental study has been carried out comparing the effects of the different fuels on the mass ...
An investigation of partially premixed compression ignition combustion using gasoline and spark assistance

Benajes Calvo, Jesus Vicente; García Martínez, Antonio; Domenech Llopis, Vicente; Durret, Russell (Elsevier, 2013-04-15)

Nowadays the automotive scientific community and companies are focusing part of their efforts on the investigation of new combustion modes in Compression Ignition (Cl) engines, mainly based on the use of locally lean air ...
Conceptual model description of the double injection strategy applied to the gasoline partially premixed compression ignition combustion concept with spark assistance

Benajes Calvo, Jesus Vicente; Molina Alcaide, Santiago Alberto; García Martínez, Antonio; Monsalve Serrano, Javier; Durrett, Rusell (Elsevier, 2014-09-15)

New combustion concepts applied to Compression Ignition engines are focused on achieve low temperature combustion together with a lean mixture distribution by allowing extra time from the end of injection to the start of ...
Experimental and computational study of the influence of partial needle lift on nozzle flowin diesel fuel injectors

Payri, Raul; Gimeno, Jaime; Venegas Pereira, Óscar Hernando; Plazas-Torres, Alejandro H. (Begell House, 2012)

[EN] This paper presents an experimental and computational study with the aim of developing a fundamental understanding of the nozzle internal flow behavior in a prototype piezo-stack injector with a multi-orifice nozzle, ...
Experimental study of the influence of exhaust gas recirculation on heat transfer in the firedeck of a direct injection diesel engine

Torregrosa, A. J.; Broatch, A.; Olmeda, P.; Salvador-Iborra, Josep; Warey, Alok (Elsevier, 2017-12-01)

[EN] Emissions control is a key topic for internal combustion engine development. One of the most widespread technologies to reduce the formation of nitrogen oxides is the recirculation of exhaust gas to the engine intake. ...
Experimental study of the relationship between injection rate shape and Diesel ignition using a novel piezo-actuated direct-acting injector

Macian Martinez, Vicente; Payri Marín, Raúl; Ruiz Rosales, Santiago; Bardi, Michele; Plazas, Alejandro H. (Elsevier, 2014-04-01)

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 ...
In-cylinder soot radiation heat transfer in direct-injection diesel engines

Benajes Calvo, Jesus Vicente; Martín Díaz, Jaime; García Martínez, Antonio; Villalta Lara, David; Warey, Alok (Elsevier, 2015-12)

The efficiency and CO2 are one of the main concerns of automotive manufacturers. There are several strategies under investigation to solve this problem. In the present work, the research effort has been focused on improving ...
Needle lift profile influence on the vapor phase penetration for a prototype diesel direct acting piezoelectric injector

Payri, Raul; Gimeno, Jaime; Viera, Juan P.; Plazas Torres, Alejandro Hernán (Elsevier, 2013-11)

In this study, Schlieren visualization tests have been performed for a prototype diesel common rail direct-acting piezoelectric injector, to understand the influence of fuel injection rate shaping on the vapor spray ...
Performance and engine-out emissions evaluation of the double injection strategy applied to the gasoline partially premixed compression ignition spark assisted combustion concept

Benajes Calvo, Jesus Vicente; Molina Alcaide, Santiago Alberto; García Martínez, Antonio; Monsalve Serrano, Javier; Durrett, Russell (Elsevier, 2014-12-01)

Spark assistance has been found to improve combustion control when combined with both single and double injection operation applied to compression ignition (CI) engines using gasoline as the fuel. Previous work has verified ...
Single-cylinder engine evaluation of a multi-component diesel surrogate fuel at a part-load operating condition with conventional combustion

Szymkowicz, Patrick G.; Benajes, Jesús (Elsevier, 2018)

[EN] Simple, yet fully-representative surrogate fuels are needed to model market Diesel fuels. The surrogates must closely mimic market Diesel fuel properties and match the engine combustion and emissions behavior. To this ...
Study liquid length penetration results obtained with a direct acting piezo electric injector

Payri, Raul; Gimeno, Jaime; Bardi, Michele; Plazas, Alejandro H. (Elsevier, 2013-06)

A state of the art prototype common rail injector featuring direct control of the needle by means of a piezo stack (direct acting) has been tested. Liquid phase penetration of the sprays in diesel engine-like conditions ...