FACTORS OF INCREASING ENGINE OIL REPLACEMENT TIME IN AUTOMOBILE DIESEL ENGINES
F. L. Nazarov
FSUE "NAMI", Moscow; Orenburg State University, Orenburg, Russia
e-mail: nazarovf@yandex.ru
Abstract. The relevance of the research topic is due to the fact that the potential for increasing the replacement period of engine oil in modern and promising automotive engines should have not only a marketing basis, but also a scientific justification for its implementation. The aim of the study is to reduce the unit cost of maintenance of automobile engines by increasing the timing of engine oil change. A particular task within the framework of this article is to establish the factors that cause an increase in the period for replacing engine oil in automobile diesel engines (on the example of the KAMAZ R6 family).
The methodological apparatus for solving this problem was based on an in-depth analysis of previously obtained results of experimental studies of the patterns of «aging» of motor oils in diesel engines of the KAMAZ V8 family, depending on various factors in conjunction with the criterion of «rigidity» of the engine oil.
For the first time, a quantitative assessment of the influence of the identified factors on the increase in the oil change period is given (ceteris paribus):
– the use of oils of higher classes in terms of performance – for example, the transition from CD to CF-4 / SG according to API – by 4,4 times;
– reduction of sulfur content in fuel - for example, for the API CG-4 class with a decrease from 0,05% to 0,035% – by 2,6 times, for the API CI-4 class with a decrease from 0,035% to 0,001% – in 2,3 times;
– reduction of the criterion of «rigidity» of oil operation A – for example, for API CF-4 / SG class with a decrease (in terms of engine power) from A = 770 to A = 550 – 4 times; for the API CI-4/CG-4 class with a decrease (in terms of oil sump capacity) from A = 1176 to A = 835 – by 2,8 times, and to A = 640 – by 3,1 times.
The basic requirements for engine oil of engines of the KAMAZ R6 family are formulated. The selected oils of two brands provided a test-confirmed increase to 150 thousand km. replacement period, and therefore were approved for use by the manufacturer of KAMAZ PJSC.
The theoretical value for the development of the branch of science «Operation of road transport» lies in the fact that the identified factors and patterns contribute to the study of the efficiency, quality, characteristics, performance indicators of automotive operating materials.
The author sees further research based on this work in a formalized assessment of the influence of the factors under consideration on the period of replacement of engine oil.
Key words: diesel engines, engine oil, replacement period, base number, criterion of «rigidity».
Cite as: Nazarov, F. L. (2023) [Factors of increasing engine oil replacement time in automobile diesel engines]. In tellekt. Innovacii. Investicii [Intellect. Innovations. Investments]. Vol. 5, pp. 92–101, https://doi.org/10.25198/2077- 7175-2023-5-92.
