Fuel temperature influence on the performance of a last generation common-rail diesel ballistic injector. Part II: 1D model development, validation and analysis

Payri, Raúl; Salvador, F.J.; Carreres, Marcos; Morena, Joaquín De la

doi:10.1016/j.enconman.2016.02.043

Cited by 53 publications

(48 citation statements)

References 25 publications

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“…Experiments and simulations on the fuel injection process showed that, when the fuel temperature was increased, the actual injection timing was retarded, the peak rail pressure was decreased and the injection duration was prolonged [32,35]. The fuel mass flow rate was decreased with the increase of fuel temperature because of the decreased fuel density [24,36,37]. Furthermore, the size of vapour bubbles at the injector's nozzle exit increased with the increase of the fuel temperature [38], which would decrease the nozzle discharge coefficient.…”

Section: Combustion Characteristics With Edi Heating At the Original mentioning

confidence: 97%

Investigation of the effect of heated ethanol fuel on combustion and emissions of an ethanol direct injection plus gasoline port injection (EDI + GPI) engine

Huang

Hong

2016

Energy Conversion and Management

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a b s t r a c tEthanol direct injection plus gasoline port injection (EDI + GPI) is a new technology to utilise ethanol fuel more efficiently and flexibly in spark ignition engines. One issue needs to be addressed in the development of EDI + GPI is the ethanol fuel's low vapour pressure and large latent heat which slow down the ethanol's evaporation and result in the mixture unready for combustion by the time of spark ignition and the consequent increase of CO and HC emissions. Heating the ethanol fuel to be directly injected (EDI heating) has been proposed to address this issue. This paper reports the investigation of the effect of EDI heating on the combustion and emissions of a research engine equipped with EDI + GPI. The results showed that EDI heating effectively reduced the CO and HC emissions of the engine due to the increase of evaporation rate and reduced fuel impingement and local over-cooling. The reduction of CO and HC became more significant with the increase of ethanol ratio. When the temperature of the ethanol fuel was increased by 40°C, the CO and HC were reduced by as much as 43% and 51% respectively in EDI only condition at the original spark timing of 15 CAD BTDC, and 15% and 47% respectively at the minimum spark advance for best torque (MBT) timing of 19 CAD BTDC. On the other hand, the NO emission was slightly increased, but still much smaller than that in GPI only condition due to the strong cooling effect and low combustion temperature of EDI. The IMEP and combustion speed were slightly reduced by EDI heating due to the decrease of injector fuel flow rate and spray collapse of flash-boiling. The largest decrease of IMEP was 5% at the original spark timing and 3% at the MBT timing. Moreover, at the MBT timing, the IMEP increased continuously with the increase of ethanol ratio in the entire range from 0% to 100%. This indicated that the decrease of IMEP in high ethanol ratio conditions at the original spark timing could be avoided by adjusting the spark timing. Therefore EDI heating is effective to address the issues of ethanol's low evaporation rate in low temperature engine environment and over-cooling effect at high ethanol ratio condition in the development of EDI + GPI engine.

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Section: Combustion Characteristics With Edi Heating At the Original mentioning

confidence: 97%

Investigation of the effect of heated ethanol fuel on combustion and emissions of an ethanol direct injection plus gasoline port injection (EDI + GPI) engine

Huang

Hong

2016

Energy Conversion and Management

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“…For too small injection quantities the dynamic of the injector needle is affected by fuel viscosity which changes the injection rate shape and timing [16]. If the injector needle reaches its highest position than the close curve depends on the viscosity [17]. This phenomenon could not be noticed in [15] and [18].…”

Section: Introductionmentioning

confidence: 94%

Influence of the Fuel Properties on the Injection Process and Spray Development in a large ship diesel Engine

Najar¹,

Buchholz²,

Scheibe³

et al. 2017

Proceedings ILASS–Europe 2017. 28th Conference on Liquid Atomization and Spray Systems

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The present paper deals with the influence of fuel properties on the spray behaviour. This influence was studied experimentally using a common rail injection system from a medium speed diesel engine. The experiments have been performed with diesel fuel (EN-590) and heavy fuel oil (RMG 180) on a constant volume chamber at room temperature. Comparison of the spray characteristics shows that the heavy fuel oil penetrates deeper in the chamber. However, the diesel spray has a bigger cone angle. These results formed the basis for a further development of the 1D-model [1] to predict the spray penetration by considering the fuel properties and temperature.

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“…It is the integration of the 185 solenoid assembly, injector body and the nozzle assembly. In this model, some 186 assumptions were made that all the variations are considered to be isothermal, so, the 187 fuel temperature was assumed to be constant along the injector and equal to the one at 188 the injector inlet, and the fuel properties were assumed to be constant [26]. Additionally, 189 a constant pressure source was adopted here to simulate the pressure from the high-190 pressure pump, which neglected the pressure fluctuations caused by the cyclical oil 191 supply from high-pressure pumps.…”

Section: Integration Of the Injector Model 184mentioning

confidence: 99%

“…The effects of these important influential factors on the dynamic response were 337 26 demonstrated by RSM function charts at 160 MPa pressure, which is shown in Fig. 14.…”

mentioning

confidence: 99%

Study of the impact of structural parameters on the dynamic response of an electronic fuel injector

Yang

Zhou

et al. 2017

Energy Conversion and Management

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This version is available at https://strathprints.strath.ac.uk/59431/ Strathprints is designed to allow users to access the research output of the University of Strathclyde. Unless otherwise explicitly stated on the manuscript, Copyright © and Moral Rights for the papers on this site are retained by the individual authors and/or other copyright owners. Please check the manuscript for details of any other licences that may have been applied. You may not engage in further distribution of the material for any profitmaking activities or any commercial gain. You may freely distribute both the url (https://strathprints.strath.ac.uk/) and the content of this paper for research or private study, educational, or not-for-profit purposes without prior permission or charge.Any correspondence concerning this service should be sent to the Strathprints administrator: strathprints@strath.ac.ukThe Strathprints institutional repository (https://strathprints.strath.ac.uk) is a digital archive of University of Strathclyde research outputs. It has been developed to disseminate open access research outputs, expose data about those outputs, and enable the management and persistent access to Strathclyde's intellectual output. 1 Study of the Impact of Structural Parameters on the Dynamic Abstract 10The study concentrates on the effects of structural parameters of an electronic fuel 11 injector on its dynamic response (the opening delay and the closing delay). The injector 12 was developed for a marine medium-speed diesel engine. The dynamic response from 13 the start of the control signal to the end of the needle valve closing were investigated. 14 Firstly, a complete and detailed model of the electronic fuel injector was built and 15 integrated into an optimisation model, where a MOGA was applied. Secondly, the 16 importance and effects of main structural parameters on dynamic response were 17 examined, as were their interactions. Finally, a Pareto optimum was obtained through 18 scattering charts and comparisons were made between the baseline design and the 19 optimal design. Results show that the control piston diameter, fuel oil inlet passage 20 *

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Fuel temperature influence on the performance of a last generation common-rail diesel ballistic injector. Part II: 1D model development, validation and analysis

Cited by 53 publications

References 25 publications

Investigation of the effect of heated ethanol fuel on combustion and emissions of an ethanol direct injection plus gasoline port injection (EDI + GPI) engine

Investigation of the effect of heated ethanol fuel on combustion and emissions of an ethanol direct injection plus gasoline port injection (EDI + GPI) engine

Influence of the Fuel Properties on the Injection Process and Spray Development in a large ship diesel Engine

Study of the impact of structural parameters on the dynamic response of an electronic fuel injector

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