THE INFLUENCE OF DIESEL FUEL QUALITY ON THE RESOURCE OF ENGINE AND ENGINE OIL

Abstract

With an increase in the operating time of the machine, the properties of engine oils are constantly changing due to operating conditions, the effects of various factors, pressures and temperatures, as well as the actual condition of the engine systems and mechanisms that come into contact with the oil. To ensure the smooth operation of the internal combustion engine, it is necessary to monitor various oil indicators, including the determination of wear metals. (Research purpose) The research purpose is theoretically determining the influence of diesel fuel quality on the resource of engine and engine oil. (Materials and methods) It was found that increased wear of contact friction pairs, primarily the cylinder-piston group and the crank mechanism, begins when the permissible content of mechanical impurities in engine oil is exceeded. Basically, these are small particles of abrasives that have passed through the filter, which are formed in part of the carbon. It was noted that they are a fairly hard abrasive and quickly wear out piston rings, bushings, bearings. (Results and discussion) It was revealed that negative changes in the physico-chemical properties of engine oil, a high concentration of wear elements are due to the use of high-sulfur fuel, the sulfur concentration of which in the diesel fuel used exceeds the permissible limits by more than 1000 times. In this regard, the effective, neutralizing properties of the lubricant were exhausted many times faster. It was noted that the high concentration of sulfur caused increased wear of the contact friction pairs of engine parts. (Conclusions) The use of low-sulfur fuel in the operation of a diesel engine will increase the life of the oil and engine. The annual number of oil changes will decrease, therefore, the cost of operating the car will be reduced. Receiving timely information about impurities in engine oil warns of emerging problems in the engine. This will help to avoid serious repairs and high costs and will lead to significant savings for the fleet.