The results of the analysis of the continuous input of additives in the lubricating system of the engine operating on gaseous fuel

Abstract

The issue of ensuring the reliability of internal combustion engines is an urgent complex task, solved in different directions. Important among which are the operating conditions, the type of fuel used, monitoring the condition of engine oils, as well as the rationale for the service life of oils. When improving the design of tractors, it is necessary to take into account the issue of increasing their reliability and durability during operation. The studies show that 40-45 % of failures of agricultural machinery are caused by engine breakage. It is rational to solve the problem of improving the reliability of the engine, determining the state of the aggregates and machine parts on the content of wear products in the oil during engine operation, and making informed decisions to improve the condition of the oil. In order to improve the performance properties the additives are used. In order to determine the effect of the continuous use of additives to the oil, a cylinder was designed, comprising a housing, a cylindrical element for the additive, a cap, an inlet nozzle and an outlet nozzle. The element located inside the housing is filled with an additive. Engine oil lubrication system is supplied from the outside, i.e. in the annular gap between the housing and the element for the additive. In the housing, due to the temperature difference, the process of oil diffusion and additives take place. The purpose of the development of the laboratory setup was to study the influence of external factors on the process of continuous input of additives and the determination of their rational values. Studies have shown that the base number with continuous input of additives increased 1,5 times higher compared to samples of oils, used without a device for continuous input of additives. A device for introducing the additive with a filter element was tested. The operating mode of the installation was set according to the results of studies T = 85 °C, ν = 2 m/s and the concentration of mechanical impurities was 0,25 %. Operational tests of the device were carried out over a period of time until the base number dropped below 2 mgKOH/g. It follows that the oil life cycle increases on average by 15-20 %.