Abstract
The paper is devoted to the study of the regularities of changes in the quality of working fluids circulating through the systems of internal combustion piston engines. During the research, the parameters of fluids that characterize its operational properties, as well as external effects that can lead to changes in the properties of the fluid, were determined. It is shown that the deterioration of the quality of engine oil and coolant of piston engines during operation is caused by the destruction of additives that are part of the fluid and provide their required properties. A laboratory installation has been developed and created that allows simulating thermal and mechanical effects on working fluids similar to those acting during circulation through engine systems. The graphical dependencies obtained as a result of the experiment are presented. Mathematical processing of the experimental data allowed obtaining regression dependencies that correctly describe the processes of changes in time of the most important characteristics of working fluids under the action of cyclic thermal and mechanical effects. The described method can be used to study the influence of operational factors on the properties of various working fluids of internal combustion piston engines.
Highlights
Internal combustion piston engines (ICE) are the main element of power plants of road, rail and water transport, as well as stationary installations for various purposes [1, 2]
The economic, resource and environmental performance of the internal combustion engine is influenced by both the operating conditions [3, 4] and the quality of operating materials, which include fuel, engine oil and coolant and the parameters of lubrication and cooling [5, 6]
To determine the permissible duration of use of engine oil and engine coolant fluid, it is necessary to investigate the influence of operational factors on their quality, characterized by a complex of physical and chemical properties
Summary
Internal combustion piston engines (ICE) are the main element of power plants of road, rail and water transport, as well as stationary installations for various purposes [1, 2]. The engine oils and coolants of the cooling system repeatedly circulate through the lubrication and cooling systems for a long time and should be considered as the working fluids of the engine These fluids have a long service life, during which their composition changes, and their performance properties steadily deteriorate. The performance of the lubrication and cooling systems and the quality of working fluids are monitored, the methods and means of which are considered in works [9, 10] Such control is not possible on all types of power plants, so it is of interest to predict the condition of working fluids, taking into account the impact of operational factors on them. To determine the permissible duration of use of engine oil and engine coolant fluid, it is necessary to investigate the influence of operational factors on their quality, characterized by a complex of physical and chemical properties
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