THE INFLUENCE OF SURFACE-REPAIRING ADDITIVES ON THE LUBRICABILITY OF USED ENGINE OIL

Abstract

Modern machines have different configurations friction hitches, which operate under different conditions and have different parameters. Intensive wear of the material in the tribopair occurs in the boundary and mixed lubricated rolling, where there is direct contact between the two surfaces. Lubricant in the tribopair performs several functions. One of the most important is the separation of two surfaces. The second is the cooling of the point of contact, because the heat resulting from friction has a lot of negative influence on the change of the surface material properties and the aging of the lubricants. The third is cleaning the point of contact from friction wear products. Engine oils are provided to consumers already with the necessary, optimally selected properties. However, there is a considerable supply of additional add-ons on the market. The question of the investigation was - at what point would it be beneficial to add additional supplements for new oil, already containing all the necessary additives, to improve the properties of lubrication during operation. The aim of the work was to investigate the influence of the engine oil additive on the lubricity of the oil used for a certain period of time. During the research, it was found that it is most practical to use the additive just after reaching a 3000 km mark. It was determined that the wear of the parts was 15-18% lower when using oil with an additive, compared to the control oil.