Comparative tests of diesel injectors with current and upgraded nozzles

Abstract

BACKGROUND: More than 60% of agricultural tractor failures are due to diesel engine failure. Half of diesel engine failures relate to the fuel supply system, which is mainly dependent on the service life of diesel injectors’ nozzles.

AIM: Increasing the durability of the nozzle by means of upgrading the nozzle needle.

METHODS: To increase the working life of the diesel injector nozzle, a new technical solution, the idea of which is applying a screw channel to the bearing surface of the needle, was proposed. The presence of the screw channel leads to axisymmetric pressure on the needle, which gives it increased stability and prevents the possibility of skewing and freezing. The Russian patent has been received for this invention. To confirm the expected effect, comparative laboratory tests were carried out with current and upgraded nozzle design. To carry out accelerated tests, the “dusty” fuel, obtained by adding quartz sand abrasive, was used. During the tests, the following were assessed: atomization quality, sealing cone tightness, hydraulic density, needle stroke and effective flow area. The assessment of wear of the mating surfaces of the nozzle depends on the value of the hydraulic density.

RESULTS: As a result of the experiment, it was found that the limiting value of hydraulic density for the current injectors occurs after 2500 operating hours and is characterized by a violation of tightness. For the upgraded injectors, the hydraulic density limit occurs after 4300 operating hours.

CONCLUSION: Applying a screw channel on the bearing surface of the needle helps to increase the service life of the diesel injector by 23%.

Keywords

diesel / nozzle / injector / test / service life / upgrade

References

[1] Krasnokutsky VV, Rusanov MA, Troyanovskaya IP. Diesel engine power systems. Part 1. Назначение и конструкция. Purpose and design. Chelyabinsk: YuUrGU; 2017. 72 p. (in Russ).

[2] Краснокутский В.В., Русанов М.А., Трояновская И.П. Системы питания дизельных двигателей. Ч. 1. Назначение и конструкция. Челябинск: ЮУрГУ, 2017.

[3] Krasnokutsky VV, Rusanov MA, Troyanovskaya IP. Diesel engine power systems. Part 2. High pressure fuel pumps. Chelyabinsk: YuUrGU; 2017. 61 p. (in Russ).

[4] Краснокутский В.В., Русанов М.А., Трояновская И.П. Системы питания дизельных двигателей. Ч. 2. Топливные насосы высокого давления. Челябинск: ЮУрГУ, 2017.

[5] Apazhev AK, Shekikhachev YA, Batyrov VI, Shekikhacheva LZ. Influence of non-uniformity of fuel supply parameters on diesel engine performance. J. Phys.: Conf. Ser. 2020;1678:42063. doi: 10.1088/1742-6596/1679/4/042063

[6] Apazhev A.K., Shekikhachev Y.A., Batyrov V.I., Shekikhacheva L.Z. Influence of non-uniformity of fuel supply parameters on diesel engine performance. J. Phys.: Conf. Ser. 2020. Vol. 1678. P. 42063. doi: 10.1088/1742-6596/1679/4/042063

[7] Gurin TYu. Increasing the durability of automotive diesel injectors by modernizing nozzles: abstract of thesis [dissertation abstract] Novosibirsk; 2010. (in Russ).

[8] Гурин Т.Ю. Повышение долговечности форсунок автотракторных дизелей модернизацией распылителей: автореф. дис. … канд. техн. наук. Новосибирск, 2010.

[9] Batyrov VI, Gubzhokov HL, Bolotkov AL. Features of the diesel engine in high -mountain conditions. Rural machine operator. 2017;2:20–25. (in Russ).

[10] Батыров В.И., Губжоков Х.Л., Болотоков А.Л. Особенности работы дизеля в высокогорных условиях // Сельский механизатор. 2017. № 2. С. 20–25.

[11] Batyrov VI, Bolotkov AL. Increasing the reliability of diesel injector atomizer operation. Technology in agriculture. 2012;3:12–15. (in Russ).

[12] Батыров В.И., Болотоков А.Л. Повышение надежности работы распылителя форсунки дизелей // Техника в сельском хозяйстве. 2012. № 3. С. 12–15.

[13] Markov V, Devyanin S, Kamaltdinov V, Sa B. Improvement of Design of Diesel Injector Nozzles. IOP Conf. Ser.: Earth Environ. Sci. 2021;678(1):012008. doi: 10.1088/1755-1315/678/1/012008

[14] Markov V., Devyanin S., Kamaltdinov V., Sa B. Improvement of Design of Diesel Injector Nozzles // IOP Conf. Ser.: Earth Environ. Sci. 2021. Vol. 678 (1). P. 012008. doi: 10.1088/1755-1315/678/1/012008

[15] Bolotokov A, Gubzhokov H, Ashabokov K, et al. Improving the Fuel Efficiency of an Agricultural Tractor Diesel Engin. E3S Web of Conferences. 2023;411:01045. doi: 10.1051/e3sconf/202341101045

[16] Bolotokov A., Gubzhokov H., Ashabokov K., et al. Improving the Fuel Efficiency of an Agricultural Tractor Diesel Engine // E3S Web of Conferences. 2023. Vol. 411. No. 01045. doi: 10.1051/e3sconf/202341101045

[17] Patent RUS 2231673 / 27.06.2004. Bull. 15. Khashirov YuM, Bugov KhU, Bolotokov AL. Diesel injector atomizer. (in Russ). EDN: QICOPD

[18] Патент на изобретение РФ 2231673/ 27.06.2004. Бюл. №15. Хаширов Ю. М., Бугов Х.У., Болотоков А.Л. Распылитель дизельной форсунки. EDN: QICOPD

[19] GOST 18509-88. Tractor and combine diesel engines. Bench test methods. Moscow: Izd-vo standartov; 1988. (in Russ).

[20] ГОСТ 18509-88. Дизели тракторные и комбайновые. Методы стендовых испытаний. М.: Изд-во стандартов, 1988.

[21] GOST 305-82. Diesel fuel. Technical conditions. Moscow : Izd-vo standartov; 1982. (in Russ).

[22] ГОСТ 305-82. Топливо дизельное. Технические условия. М.: Изд-во стандартов, 1982.

[23] GOST 10579-88. Diesel injectors. General technical conditions. Moscow : Izd-vo standartov; 1988. (in Russ).

[24] ГОСТ 10579-88. Форсунки дизелей. Общие технические условия. М.: Изд-во стандартов, 1988.

[25] GOST 3647-80. Grinding materials. Classification. Grain size and grain composition. Moscow : Izd-vo standartov; 1980. (in Russ).

[26] ГОСТ 3647-80. Материалы шлифовальные. Классификация. Зернистость и зерновой состав. Методы контроля. М.: Изд-во стандартов, 1980.

[27] Veselovsky A, Troyanovskaya I, Syromyatnikov Y, et al. Features of Wear of Gears of Agricultural Machinery. Acta Technologica Agriculturae. 2023;4:207–214. doi: 10.2478/ata-2023-0028

[28] Veselovsky A., Troyanovskaya I., Syromyatnikov Y., et al. Features of Wear of Gears of Agricultural Machinery // Acta Technologica Agriculturae. 2023. Vol. 4. Р. 207–214. doi: 10.2478/ata-2023-0028

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