Experimental investigation and hydraulic simulation of dynamic effects on diesel injection characteristics in indirect acting piezo-driven injector with bypass-circuit system

Jo, Insu; Chung, Myungchul; Kim, S. M.; Sung, Gisu; Lee, Jinwook

doi:10.1007/s12239-015-0019-0

Cited by 14 publications

(7 citation statements)

References 15 publications

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“…22 At present, it has been widely used in fuel injection performance analysis for diesel engine fuel system. 8,23–26 The AMESim simulation model of the system studied in this article is proposed as shown in Figure 2. During modeling, the basic modeling principles of AMESim software are strictly followed.…”

Section: System Modeling and Validationmentioning

confidence: 99%

“…Under the premise that the traditional energy cannot be replaced by the renewable ones in a wide range in the foreseeable future, the performance and fuel consumption for the diesel engines must be improved. 8 On the other hand, the emissions produced during the operation of diesel engines contains many harmful components such as NO x , PM, CO, which causes serious environment pollution. 9,10 Therefore, it is an important task and challenge for the researchers in the field of diesel engine technology to maintain the healthy and stable development of diesel engines.…”

Section: Introductionmentioning

confidence: 99%

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Research on the correlation between fuel injection quantity and key structural parameters for the fuel system of marine diesel engines

Fan

Liu

Bai

et al. 2021

Proceedings of the Institution of Mechanical Engineers, Part C:

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In order to demonstrate the relationship between the fuel injection quantity and the structural parameters of the fuel system for large marine diesel engines, an AMESim model of a double-valve controlled fuel system is proposed. The accuracy of the model is validated in view of fuel injection quantity and system pressures. The correlation analysis is performed to illustrate the effects of single parameters and the interactions between different parameters on the fuel injection quantity. Considering the high calculation cost of the simulation model, the prediction model between the fuel injection quantity and the structural parameters for each working condition is obtained based on D-optimal design of experiments and the response surface methodology in this article. For the maximum deviation between the calculated and predicted fuel injection quantity is only 4.27%, the prediction models could be used for further analysis. And the results show that the diameters of high-pressure fuel tube (HPFT), small and big ends of pressure amplification piston (PAP) are the key single parameters. The absolute values of their correlation coefficients are between 0.77 and 0.87, between 0.22 and 0.43 and between 0.14 and 0.26 respectively. The correlation coefficients for the other parameters are all relatively small. For interactive parameters, the absolute values for all the correlation coefficients are less than 0.1. And the interactions between the diameters of big and small diameters of PAP, between the diameter of small end of PAP and the diameter of HPFT, between the diameter of HPFT and the pre-tightening force of needle spring influence the fuel injection quantity relatively obviously.

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Section: System Modeling and Validationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Research on the correlation between fuel injection quantity and key structural parameters for the fuel system of marine diesel engines

Fan

Liu

Bai

et al. 2021

Proceedings of the Institution of Mechanical Engineers, Part C:

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show abstract

“…Solenoid-driven injectors are widely used in the common rail direct injection (CRDI) engines for a desired fuel injection process. The solenoid technology is reliable and cost effective [146][147][148]. The effect of diesel and biodiesel on the hydraulic behavior of a solenoid-operated common rail injection system was studied by a one-dimensional model.…”

Section: Solenoid Injectormentioning

confidence: 99%

A Review of Performance-Enhancing Innovative Modifications in Biodiesel Engines

Khan

2020

Energies

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The ever-increasing demand for transport is sustained by internal combustion (IC) engines. The demand for transport energy is large and continuously increasing across the globe. Though there are few alternative options emerging that may eliminate the IC engine, they are in a developing stage, meaning the burden of transportation has to be borne by IC engines until at least the near future. Hence, IC engines continue to be the prime mechanism to sustain transportation in general. However, the scarcity of fossil fuels and its rising prices have forced nations to look for alternate fuels. Biodiesel has been emerged as the replacement of diesel as fuel for diesel engines. The use of biodiesel in the existing diesel engine is not that efficient when it is compared with diesel run engine. Therefore, the biodiesel engine must be suitably improved in its design and developments pertaining to the intake manifold, fuel injection system, combustion chamber and exhaust manifold to get the maximum power output, improved brake thermal efficiency with reduced fuel consumption and exhaust emissions that are compatible with international standards. This paper reviews the efforts put by different researchers in modifying the engine components and systems to develop a diesel engine run on biodiesel for better performance, progressive combustion and improved emissions.

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“…However, this type of injector is likely to exhibit an injection delay. Therefore, a number of studies [6,7] have focused on the characteristics and injection flexibility of a piezo-driven injector.…”

Section: Maximum Injection Pressure Measurementmentioning

confidence: 99%

A Study on the Optimal Actuation Structure Design of a Direct Needle-Driven Piezo Injector for a CRDi Engine

2017

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Abstract:Recently, the high-pressure fuel injection performance of common-rail direct injection (CRDi) engines has become more important, due to the need to improve the multi-injection strategy. A multiple injection strategy provides better emission and fuel economy characteristics than a normal single injection scheme. The CRDi engine performance changes with the type of high-pressure electro-mechanical injector that is used and its injection response in a multi-injection scheme. In this study, a direct needle-driven piezo injector (DPI) was investigated, to optimize its actuation components, including the plate length, number of springs, and the elasticity of the spring between the injector needle and the piezo stack. Three prototype DPIs were proposed by this research. They were classified as Type 1, 2, and 3, depending on whether the injector needle was hydraulic or mechanical. Then, the optimal prototype was determined by conducting four evaluation experiments analyzing the maximum injection pressure, injection rate, spray visualization, and real engine combustion application. As a result, it was found that the Type 3 DPI prototype, with several pan-springs and plates, had the highest injection pressure, a steady injection rate, and the fastest spray speed. It also demonstrated the most effective emission reduction for a two-stage rapid spray injection in a single-cylinder CRDi engine. The Type 3 DPI displays an increased elasticity from its hydraulic needle that provides a synergy effect for improving DPI actuation.

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Experimental investigation and hydraulic simulation of dynamic effects on diesel injection characteristics in indirect acting piezo-driven injector with bypass-circuit system

Cited by 14 publications

References 15 publications

Research on the correlation between fuel injection quantity and key structural parameters for the fuel system of marine diesel engines

Research on the correlation between fuel injection quantity and key structural parameters for the fuel system of marine diesel engines

A Review of Performance-Enhancing Innovative Modifications in Biodiesel Engines

A Study on the Optimal Actuation Structure Design of a Direct Needle-Driven Piezo Injector for a CRDi Engine

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