Performance of new and aged injectors with and without fuel additives in a light duty diesel engine

Zhu, Xinda; Andersson, Öivind

doi:10.1016/j.treng.2020.100007

Cited by 14 publications

(8 citation statements)

References 27 publications

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“…lifting (11) causes the emergence of DSC1, and Kirchhoff's equation, reflecting such an increase in electric current intensity, needs to be completed with a factor taking into account the influence of the forces being overcome: 𝐹 𝑚 > 𝐹 𝑝 + 𝐹 𝑖 + 𝐹 𝑓 + 𝐹 𝑠 (11) where: 𝐹 𝑝 -the force resulting from the fuel pressure; 𝐹 𝑖 -inertial force; 𝐹 𝑓 -frictional force; 𝐹 𝑠 -the force of the spring. Kirchhoff's equation, a result of which the value of the current intensity 𝐹 𝑠 will be obtained, corresponding to the range of the needle lifting, is determined by the equation below, where the factor 𝑓 𝑝𝑟𝑒𝑠𝑠 diminishes the resultant value of the electric current intensity:…”

Section: Dsc-derivative Sign Changementioning

confidence: 99%

“…The research regarding the effects of fuel injectors and the type of fuel supplied on the emissions of toxic ingredients of exhaust gases can be found in [7][8][9]. The research on diagnosing the elements of fuel injection, including the effect of change of their technical state, can be found in [10,11] and in works [12][13][14][15][16], the research on the effects of sediments on the injector. Mohan B. et al in [17] discuss the method of measurement based on gauging the momentum flow of the atomized fuel stream from each injector nozzle opening and determining the coefficient of the outflow share from a given opening in relation to the others.…”

Section: Introductionmentioning

confidence: 99%

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Method of Fuel Injector Diagnosis Based on Analysis of Current Quantities

Więcławski

Figlus

Mączak

et al. 2022

Sensors

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This paper discusses a method of diagnosing electromagnetic valves of injection systems in combustion engines. Based on multiple analyses of electrical quantities occurring in the course of the electromagnetic injector work and physical relationships between them, the quantities have been demonstrated on which the fluctuation of the electromagnetic force in the injector depends. Moreover, the results of its fluctuations have been mapped to the electric quantities controlling the fuel injector’s work. The research has shown that the current and voltage waveforms contain information on electrical properties of the injector coil and its mechanical properties determining the injector’s technical health as well as that of the fuel system.

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Section: Dsc-derivative Sign Changementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Method of Fuel Injector Diagnosis Based on Analysis of Current Quantities

Więcławski

Figlus

Mączak

et al. 2022

Sensors

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“…A recent study conducted on a light-duty diesel engine at our laboratories found that a set of aged injectors yielded higher flow rates than a set of new injectors, when using the same injection strategies and injection pressure [30]. It was hypothesized that the geometry and/or the needle actuation could be the major causes of the phenomenon, while the presence of deposits were less likely.…”

Section: Introductionmentioning

confidence: 99%

High-Speed Imaging of Spray Formation and Combustion in an Optical Engine: Effects of Injector Aging and TPGME as a Fuel Additive

et al. 2020

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High-speed imaging of fuel sprays and combustion is conducted on a light-duty optical engine to investigate the effects of injector aging, with a focus on soot. The spray behaviors of one new and one aged injector are compared using Mie-scattering. In addition to this, the combustion process of a baseline diesel fuel and a blend with TPGME (tripropylene glycol monomethyl ether) are compared using natural luminosity (NL) imaging. TPGME is an oxygenated additive which can be used to reduce soot emissions. X-ray tomography of the two injectors demonstrates that the aging does not lead to significant geometry differences, nor to formation of dense internal nozzle deposits. Both injectors show similar liquid penetration and spreading angle. However, the aged injector shows a prolonged injection and more fuel dribbling after the injection events, leading to a higher injection quantity. The fuel quantity difference shows a larger impact on the NL at low load than the TPGME additive, indicating that the in-cylinder temperature is more important for soot oxidation than oxygen concentration under these conditions. At medium load, the NL is much less sensitive to small temperature variations, while the TPGME is more effective for soot reduction.

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“…In brief, such additives are able to suppress soot formation in diesel engines and reduce ignition delay, respectively. Compared to traditional metallic soot-reducing additives [48], ashless soot reducers have recently been investigated [49]; Tripropylene Glycol Methyl Ether has been proposed as a viable soot-reducing additive due to a higher efficacy compared to other oxygenates [50,51]. 2-Ethyl Hexyl Nitrate and di-Tert Butyl Peroxide are two of the most widely used cetane improvers.…”

Section: Introductionmentioning

confidence: 99%