Issue №: 3 (134)
The journal presents the results of scientific research and addresses current issues in the development and improvement of agricultural equipment and technologies, particularly in the design, production, and operation of machines and technical systems in the agro-industrial complex, including aspects of their efficient functioning.
CALCULATED ASSESSMENT OF THE EFFECT OF INJECTOR HOLE CLOGGING ON FUEL DELIVERY
Andrii ILCHENKO – Candidate of Technical Sciences, Associate Professor of the Department of Agricultural Engineering and Technical Service, Polissia National University, Academician of the Transport Academy of Ukraine (Zhytomyr, Ukraine; e-mail: avi_77@ukr.net; https://orcid.org/0009-0004-7615-4011)
Roman HRUDOVYI – Candidate of Technical Sciences, Associate Professor of the Department of Agricultural Engineering and Technical Service, Polissia National University (Zhytomyr, Ukraine; e-mail: roma-grudovij@ukr.net; https://orcid.org/0000-0002-7273-9432)
Maksym ZAIETS – Candidate of Technical Sciences, Associate Professor of the Department of Agricultural Engineering and Technical Service, Polissia National University (Zhytomyr, Ukraine; e-mail: mzaec81@gmail.com; https://orcid.org/0000-0002-2290-1892)
This article examines changes in fuel delivery caused by partial blockage of the nozzle holes of the 171.1112010-50 injector equipped with the 6А1-20с2-50 nozzle for MTZ tractors. The study aims to assess the effect of a reduction in the unobstructed cross-sectional area of nozzle holes on fuel flow rate and to compare uniform and non-uniform clogging. The orifice flow equation and a geometric model of a uniform annular deposit layer are applied. The geometric parameters of the nozzle are taken from the manufacturer's data, while the pressure difference, fuel density, discharge coefficient and deposit thickness are specified as calculation inputs. This approach allows the effect of geometric blockage to be assessed at constant fuel properties, including those of a blend containing biofuel.
For a nozzle with five holes having an initial diameter of 0.32 mm, a uniform deposit layer 2–10 μm thick was found to reduce the unobstructed cross-sectional area of each hole by 2.48–12.11%. At a constant pressure difference, fuel density and discharge coefficient, the volumetric fuel flow rate decreases by the same percentages. At a pressure difference of 40 MPa, a density of 850 kg/m³ and a discharge coefficient of 0.75, the formation of a 10 μm deposit layer reduces the calculated mass of fuel flowing through all holes over 1 ms from 78.65 to 69.12 mg. Three clogging scenarios with a total flow rate equal to 90% of the initial value are compared: 10% area blockage in each hole, 50% in one hole, or 25% in two holes. The coefficients of variation of flow rates between the holes are 0, 22.22 and 13.61%, respectively. For initial diameters of 0.28, 0.32 and 0.36 mm and a deposit thickness of 10 μm, the relative fuel flow rates are 86.22, 87.89 and 89.20% of the flow rate through a clean hole of the corresponding diameter, respectively.
The results show that the same total fuel flow rate can be accompanied by different distributions of flow rates among individual nozzle holes. The practical significance of the findings lies in supporting the joint assessment of total fuel delivery and its uniformity among the jets when diagnosing multi-hole injectors. The effect of changes in the discharge coefficient on the calculation results is assessed: at 10% hole area blockage, varying the ratio of the discharge coefficient to its initial value from 0.90 to 1.10 yields a relative fuel flow rate of 81–99%. The numerical results are obtained using a steady-flow model under the specified conditions.
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About the journal
G8 – Materials Science
G9 – Applied Mechanics
G10 – Metallurgy
G11 – Mechanical Engineering (by specializations)
The journal "Engineering, Energy, Transport AIC" is indexed according to the following databases and catalogs:
The All-Ukrainian scientific journal “Technology, energy, agriculture transport AIC” is an open-access scientific publication that publishes the results of original research, theoretical and applied developments, as well as scientific papers in the fields of engineering sciences, energy systems, and transport technologies of the agro-industrial complex.
The main objective of the scientific journal “Technology, energy, agriculture transport AIC” is to disseminate the results of modern scientific research and to promote the development of technical, energy, and transport solutions for the agro-industrial complex through the publication of scientific materials characterized by scientific novelty and practical significance in the field of design and modernization of machinery, equipment, and technologies.
The journal’s activities are focused on supporting the development of engineering science, stimulating the implementation of innovative approaches into industrial practice, as well as ensuring effective exchange of scientific achievements among researchers, educators, engineers, and other specialists in relevant fields.
Objectives of the Journal
To achieve its defined objective, the journal ensures the implementation of the following key tasks:
· publication of the results of fundamental and applied research covering the fields of applied mechanics, mechanical engineering, materials science, energy systems, electrical engineering, electromechanics, and transport systems of the agro-industrial sector;
· promotion of the implementation of advanced technical and technological developments aimed at improving the efficiency of machinery, equipment, and production processes;
· creation of conditions for active scientific exchange among research institutions, higher education institutions, industrial enterprises, and other interested organizations;
· support for the development of interdisciplinary research and expansion of cooperation among specialists in various fields of science and technology;
· promotion of the improvement of the scientific and technical level of research related to the design, modernization, and operation of technical equipment used in agro-industrial production;
· dissemination of information on modern achievements in science and technology and the implementation of innovative technologies in the fields of technical support, energy, and transport;
· development of a scientific information environment that facilitates effective scientific communication and the integration of national research into the international scientific community.
Publication frequency: 4 issues per year
Languages of publication: Ukrainian, English
Editor-in-Chief: Vitalii YAROPUD
State Registration: Decision of the National Council of Ukraine on Television and Radio Broadcasting № 1337 and № 1180. Media Identifier: R30-05173
EDRPOU Code: 00497236
Publisher ROR: https://ror.org/05m3ysc06
Publisher DOI prefix: 10.37128 ISSN (print): 2520-6168
The scientific journal is included in Category “B” of the List of Scientific Professional Publications of Ukraine in which the results of dissertation research for obtaining the degrees of Doctor and Candidate of Sciences may be published in the following specialties: G8 – Materials Science; G9 – Applied Mechanics; G10 – Metallurgy; G11 – Mechanical Engineering (by specializations). (Order of the Ministry of Education and Science of Ukraine dated June 11, 2026 №928
Technology, energy, agriculture transport AIC is a scholarly professional journal with a long-standing history and stable academic tradition, reflecting the evolution of engineering and technical sciences within the agro-industrial sector of Ukraine.
The journal was founded in 1997 under the title Bulletin of Vinnytsia State Agricultural Institute. According to the Resolution of the Presidium of the Higher Attestation Commission of Ukraine dated September 11, 1997, the publication obtained the status of a professional scientific journal, which enabled the publication of the main results of doctoral and candidate dissertations in technical sciences. From its inception, the journal positioned itself as an academic platform for addressing current issues of mechanization, electrification, and technical support of agricultural production. During 2001–2014, the journal was published under the title Proceedings of Vinnytsia National Agrarian University. Series: Technical Sciences (State Registration Certificate of Print Media KV No. 16644-5116 PR dated April 30, 2010). Throughout this period, a systematic approach to the selection and peer review of scientific manuscripts was established, the thematic scope of publications was expanded, and continuity of scientific directions as well as the development of sectoral engineering schools was ensured. Since 2015, the journal has been published under its current title, Technology, energy, agriculture transport AIC (State Registration Certificate No. 21906-11806 R dated March 12, 2016). The change of title reflected the expansion of the journal’s thematic coverage and its orientation toward interdisciplinary research in mechanical engineering, energy systems, electrical engineering, transport technologies, automation, and digital solutions for the agro-industrial complex.
