РЕЗУЛЬТАТЫ ИССЛЕДОВАНИЙ ПО ОЦЕНКЕ ИЗМЕНЕНИЯ СВОЙСТВ МОТОРНОГО МАСЛА БЕЗ И С ИСПОЛЬЗОВАНИЕМ ОПЕРАЦИИ ПРОМЫВКИ СИСТЕМЫ СМАЗКИ ДВИГАТЕЛЯ ТРАКТОРА

Abstract

The results of studies assessing the properties of oils for removing contaminants from the lubrication system during routine replacement of motor oils in tractor engines are presented. It has been established that when used motor oil is drained, some of the contaminants remain in the lubrication system and negatively affect both engine operation and the service life of freshly filled motor oil. Dependences of changes in the content of mechanical impurities, tar deposits, alkaline and acid numbers on operating time were obtained. It has been established that the alkaline number of the oil during the engine operating period can decrease from 8.7 mg KOH/g to 2.0 mg KOH/g and reach the rejection value by 250 hours of oil operation in the engine. The influence of the operation of flushing the lubrication system with Lukoil mineral-based flushing oil in MTZ-1221 tractor engines is considered. The flushing operation made it possible to reduce the accumulation of impurities by 20...30% over the same operating period and to reduce the accumulation of tar deposits in the engine oil from 9.8% to 0.7%. Removing contaminants from the lubrication system reduces the consumption of additives, their waste in motor oils, and precipitation along with contaminants. For an operating period of 250 hours, the alkaline number content was 4.9 mg KOH/g, while over the same operating period without flushing the lubrication system it approached the rejection value. Removing contaminants stabilizes the change in oil acid number. In general, it is noted that carrying out the operation of flushing the lubrication system of tractor engines can improve their performance and increase the service life of the engine oil before it is replaced.