Numerical and Experimental Assessment of a Solenoid Common-Rail Injector Operation with Advanced Injection Strategies

Piano, Andrea; Millo, Federico; Postrioti, Lucio; Biscontini, Giulia; Cavicchi, Andrea; Pesce, Francesco Concetto

doi:10.4271/2016-01-0563

Cited by 25 publications

(19 citation statements)

References 15 publications

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“…In this case, only a limited set of experimental data were available in terms of injection rates and with the aim of extending the availability of the model, there was the necessity to build a meaningful injection rate profiles library. Therefore, a detailed 1D model of the solenoid injector was built in GT-SUITE [8,9]. Using this model, it is possible to calculate the injection rate starting from the Electronic Control Unit (ECU) parameters, in terms of Energizing Time (ET), Dwell Time (DT) and Rail Pressure.…”

Section: D-cfd Injector Simulationmentioning

confidence: 99%

“…A reliable spray modeling is fundamental to predict the fuel spray formation process and how it affects the combustion processes and should be accurately validated, as can be seen in other investigations [6,7]. Moreover, a detailed 1D model of the injector, extensively described in [8,9], provides realistic injection rates, which are one of the fundamental inputs of a reliable 3D-CFD analysis. The entire setup is validated against experimental results on three operating points of the engine map representatives of a typical type approval driving cycle, also considering complex injection strategies with pilots and post injections.…”

Section: Introductionmentioning

confidence: 99%

“…Then, the combustion process is simulated considering only one sector of the cylinder centered on a single spray axis of the injector. The injector rate comes from a 1D injector model, extensively calibrated and validated in [8,9], in which the only input is the control current signal, in terms of Energizing Times (ET) and Dwell Times (DT). Finally, the results from the 3D combustion simulation are postprocessed by means of a 1D postprocess tool available in GT-SUITE environment: the Cylinder Pressure Analysis (CPOA).…”

Section: Introductionmentioning

confidence: 99%

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Development and Assessment of an Integrated 1D-3D CFD Codes Coupling Methodology for Diesel Engine Combustion Simulation and Optimization

Millo¹,

Piano²,

Paradisi³

et al. 2019

Preprint

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In this paper an integrated methodology for the coupling between 1D- and 3D-CFD simulation codes is presented, which has been developed to support the design and calibration of new diesel engines. The aim of the proposed methodology is to couple 1D engine models, which may be available in the early-stage engine development phases, with 3D predictive combustion simulations, in order to obtain reliable estimates of engine performance and emissions for newly designed automotive diesel engines. The coupling procedure features simulations performed in 1D-CFD by means of GT-SUITE and in 3D-CFD by means of Converge, executed within a specifically designed calculation methodology. An assessment of the coupling procedure has been performed by comparing its results with experimental data acquired on an automotive Diesel engine, considering different working points including both part load and full load conditions. Different multiple injection schedules have been evaluated for part-load operation, including pre and post injections. The proposed methodology, featuring detailed 3D chemistry modeling, was proven to be capable to properly assess pollutant formation, specifically to estimate NOx concentrations. Soot formation trend was also well-matched for most of the explored working points. The proposed procedure can therefore be considered as a suitable methodology to support the design and calibration of new Diesel engines, thanks to its ability to provide reliable engine performance and emissions estimations from the early-stage of a new engine development.

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Section: D-cfd Injector Simulationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Development and Assessment of an Integrated 1D-3D CFD Codes Coupling Methodology for Diesel Engine Combustion Simulation and Optimization

Millo¹,

Piano²,

Paradisi³

et al. 2019

Preprint

Self Cite

View full text Add to dashboard Cite

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“…where q i is the cyclic delivery of the i-th operation mode, mm 3 Structural and regulating parameters influence the performance of injectors [7]. Each parameter influences the cyclic fuel delivery.…”

Section: Theoretical Backgroundmentioning

confidence: 99%

Leak detection method for electrohydraulic injectors of diesel engines in operation

Yakimov¹,

Бондаренко²,

Krivtsov³

et al. 2018

Proceedings of the International Conference "Aviamechanical Engineering and Transport" (AVENT 2018)

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Modern automobiles equipped with an accumulator fuel-delivery system can fulfill the most demanding operational and ecological requirements. However, when fueldelivery components (predominantly, electrohydraulic injectors) break down, it is difficult to analyze their faults. Therefore, studies aimed to decrease diagnosis time, enhance informativity and accuracy and develop methods for continuous injector's health control, and fault prediction are topical. The issue is lacking data on the parameters of common rail injector, return line leaks. It makes it difficult to identify extreme conditions of accumulator fuel-delivery system's injectors. The research aims to determine the relations between injector's conditions and leakage parameters and to develop methods for identifying individual leaks in order to localize the injector's faults. The research methods are a set of analytical and experimental researches using existing analytical approaches, tools and equipment and special methods and devices. The research results are dependencies of Common Rail injectors' conditions on the parameters of individual leaks, methods for determining the parameters of individual common line leaks, equipment applied for implementation of these methods.

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“…The silicone molds are then analyzed using a Scanning Electron Microscope (SEM) to obtain the internal dimensions of these elements. More recently, high-power Computed Tomography (CT) scanning machines have also being used for the similar purposes [28]- [30].…”

Section: Introductionmentioning

confidence: 99%

Comparison of Different Techniques for Characterizing the Diesel Injector Internal Dimensions

et al. 2018

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The geometry of certain parts of diesel injectors is key to the injection, atomization and fuel-air mixing phenomena. Small variations on the geometrical parameters may have a strong influence on the aforementioned processes. Thus, OEMs need to assess their manufacturing tolerances, whereas researchers in the field (both experimentalists and modelers) rely on the accuracy of a certain metrology technique for their studies. In the current paper, an investigation of the capability of different experimental techniques to determine the geometry of a modern diesel fuel injector has been performed. For this purpose, three main elements of the injector have been evaluated: the control volume inlet and outlet orifices, together with the nozzle orifices. While the direct observation of the samples through an

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Numerical and Experimental Assessment of a Solenoid Common-Rail Injector Operation with Advanced Injection Strategies

Cited by 25 publications

References 15 publications

Development and Assessment of an Integrated 1D-3D CFD Codes Coupling Methodology for Diesel Engine Combustion Simulation and Optimization

Development and Assessment of an Integrated 1D-3D CFD Codes Coupling Methodology for Diesel Engine Combustion Simulation and Optimization

Leak detection method for electrohydraulic injectors of diesel engines in operation

Comparison of Different Techniques for Characterizing the Diesel Injector Internal Dimensions

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