Experimental investigation of fuel temperature effects on transient needle motion and injection velocity of solenoid type diesel injector

Bae, Gyuhan; Choi, S.H.; Lee, Sanggwon; Moon, Seoksu; Wang, Jin; Kım, Kihyun; Lee, Jun Young; Kang, Jae-Hoon

doi:10.1016/j.ijheatmasstransfer.2021.121838

Cited by 6 publications

(5 citation statements)

References 23 publications

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“…More specifically, some nozzles have almost the same needle valve opening and closing speed, but these speeds are different among the different nozzles, for instance, the results reported by [18] and [23]. As presented by [19,21], some nozzles have a higher needle valve opening speed relative to the closing speed, whereas some nozzles have the reverse trend, as seen in [22]. Despite a variety of needle motion profiles being used, it is unclear what the underlying mechanism is to determine the needle motion profiles and how they affect the spray dynamics.…”

Section: Introductionmentioning

confidence: 81%

“…Most recently, Raditya et al [21] discussed the needle lift dependency of the near-nozzle spray dynamics, mainly including the injection velocity and spray spreading angle at the nozzle exit. Bae et al [22] proposed an understanding of the fuel-temperature effect on fuel injection performance by measuring the transient needle motion and injection velocity.…”

Section: Introductionmentioning

confidence: 99%

“…Previous studies showed that the needle motion profiles are different in diesel nozzles. Two major categories of the needle motion profiles are commonly seen, including rectangle shape [18,20,23,24] and ramp shape [19,21,22,25,26]. It is also noted that the needle opening and closing speeds are varied among different nozzles.…”

Section: Introductionmentioning

confidence: 99%

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Investigation of Needle Motion Profile Effect on Diesel Spray in Near-Nozzle Field

et al. 2022

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A variety of needle-motion profiles are used in diesel injectors. However, it is unclear what the underlying mechanism is to determine the needle-motion profiles and how they affect the spray dynamics. It has been of significant interest to examine how the spray dynamics will change if only altering the needle valve opening speed or closing speed while all other parameters are kept the same. The different needle-motion profiles were obtained using a piezo nozzle (Nozzle #P) and a solenoid nozzle (Nozzle #S), which have identical nozzle geometry. By utilizing the X-ray imaging technique, it was observed that the average needle valve speed of Nozzle #P was 51% higher at the opening stage but 17% lower at the closing stage than Nozzle #S. When the needle valve lift is low (approximately 200 μm), the needle valve opening speed has a crucial effect on spray dynamics. The faster needle valve opening of Nozzle #P results in a 42% larger spray spreading angle and 34% lower spray velocity at the downstream field. The spray dynamics may be controllable by properly designing the needle-motion profiles in the scenarios of the low needle lifts. However, when the needle valve is sufficiently open (approximately over 200 μm), almost identical spray characteristics were observed regardless of the needle-motion profiles.

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Section: Introductionmentioning

confidence: 81%

Section: Introductionmentioning

confidence: 99%

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Investigation of Needle Motion Profile Effect on Diesel Spray in Near-Nozzle Field

et al. 2022

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“…[18][19][20] Results showed significant changes in fuel temperature across some injector restrictions, and thermal effects also influenced the injection rate and duration. Bae et al 21 experimentally analyzed the influence of fuel temperature on the transient needle movement and fuel injection speed, and the researchers believed that the increase of fuel temperature would lead to a reduced injection duration and fuel injection speed.…”

Section: Introductionmentioning

confidence: 99%

Multi-objective optimization of fuel injection performance of a common rail injector

Fan

Lan

et al. 2023

International Journal of Engine Research

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The improvement of injector performance is important for the operation of common rail (CR) fuel systems. In this study, the optimization work has been carried out on a large-flow common rail injector. First, to simulate the injection process, a one-dimensional (1-D) model was developed and validated against the experimental data. The mathematical approximation model was also established to correlate the injection performance with the factors. Then, a multi-objective model by taking three design objectives into account was established and solved. Finally, Pareto front was obtained and the final optimization solution was determined. Furthermore, an extensive validation and analysis for the optimized results under various operating conditions was also carried out. Results shows that the three objectives, total response time, injection pressure fluctuation and injection pressure drop respectively, are improved by 11.75%, 39.12%, and 10.03% under the typical condition. And the proposed multi-objective optimization program based on design of experiment (DOE) technique, response surface methodology (RSM) and Elitist Non-dominated sorting genetic algorithm (NSGA-II) in present work can exhibit a good capability to optimize the problem of the injection performance in a CR fuel system.

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“…In the studies carried out [12][13][14], diesel fuel supply control systems were developed and applied, in which the cyclic fuel supply was regulated depending on the proportion of fuels used in the mixture and the load-speed operating mode.…”

Section: Introductionmentioning

confidence: 99%

Development of a bi-fuel power supply system for a diesel engine

Buzikov

Matushkin

Matushkina

2022

IOP Conf. Ser.: Mater. Sci. Eng.

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The relevance of the study is due to the lack of systems in which the proportions of the used fuels in the mixture and the values of the cycle supply are simultaneously controlled depending on the load-speed mode of the diesel engine. The aim of the research is to develop a design for a bi-fuel power supply system for a diesel engine, which allows for the simultaneous regulation of the proportions of the components of a mixture consisting of alternative and diesel fuels, as well as the values of the cyclic supply of this mixture to the diesel cylinders. As a result of the research, an algorithm was calculated for the simultaneous control of the proportions of the components of a mixture consisting of alternative and diesel fuels, as well as the values of the cyclic supply of this mixture to the diesel cylinders. As a result of the operation of the fuel supply system on mixtures of diesel and alternative fuels according to the developed algorithm, it made it possible to achieve the identical operation of a diesel engine on pure diesel fuel at all load-speed modes of diesel operation. Also, in the course of the research carried out, a bi-fuel power supply system for a diesel engine was developed, which makes it possible to simultaneously regulate the amount (cycle supply) and the composition of a mixture consisting of diesel and alternative fuel supplied to the diesel cylinders, depending on the speed and load modes of operation.

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Experimental investigation of fuel temperature effects on transient needle motion and injection velocity of solenoid type diesel injector

Cited by 6 publications

References 23 publications

Investigation of Needle Motion Profile Effect on Diesel Spray in Near-Nozzle Field

Investigation of Needle Motion Profile Effect on Diesel Spray in Near-Nozzle Field

Multi-objective optimization of fuel injection performance of a common rail injector

Development of a bi-fuel power supply system for a diesel engine

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