Analysis of Engine Oil Deterioration Fault
Engine oil is an important lubricant for engine operation. If the engine oil deteriorates and fails to provide sufficient lubrication, the metal parts of the engine will cause galling, sticking and other phenomena, resulting in engine failure. Therefore, the quality of engine oil should be tested and inspected periodically. Therefore, the analysis of engine oil deterioration failure is of great significance.
The main factors causing engine oil deterioration failure are as follows. Firstly, the long time engine running will cause the engine oil to be continuously oxidized, polymerized and precursed, accelerated oil aging, and then produce impurities such as ash, sludge, sediment and emulsion, accumulating in the engine oil system. What’s more, the oil valve and filter core may be damaged by the impurities, resulting in poor fuel economy, oil leakage and so on. Secondly, the sulfur contained in the engine oil may react with the oil during the high temperature combustion process, producing corrosive and abrasive sulfur oxide, thus damaging the surface of parts and leading to the inability of normal lubrication. The oil oxidation rate and the use of poor quality oil all have a certain effect on the quality of the engine oil.
In the analysis of engine oil deterioration failure, we need to conduct comprehensive inspection of the engine oil. The method of engine oil inspection is similar to the operation process of car engine itself, which includes starting, normal operation and stopping, etc. During the examination, we should pay attention to observe the changes of oil pressure, color, oil, air filter and other parameters. If any abnormal phenomenon occurs, we should check and analyze the sample oil and take corresponding measures.
In order to establish the cause of engine oil deterioration failure, we should first observe the parts of the engine, take oil sample for laboratory analysis and use the scanning electron microscope for metallurgical structure analysis. At the same time, we should measure the wear of the oil sealing parts, the gap and roughness of the moving parts and the oil leakage of the engine oil. Subsequently, the acid number, oxidation number, flash point, viscosity, volatility and so on of the oil sample should be tested, to determine the quality of engine oil.
Finally, maintenance of engine oil quality should start from proper use and maintenance. First, proper selection of engine oil. The selection of lubricants should be based on the environmental conditions, load characteristics, machining conditions and other factors of the automobile engine, so as to ensure the best lubrication performance and service life. Second, timely maintenance. Regular replacement of engine oil and filter can reduce the dust and dirt in the system, reduce the corrosion of the parts and reduce the wear of the moving parts. In addition, the quality of engine oil should be inspected regularity to prevent engine oil deterioration failure.
In summary, the cause of engine oil deterioration failure often has its industrial sources, but the engine itself and fuel quality also have a certain influence. Therefore, it is very important to analyze and inspect the engine oil failure timely and accurately. This is the only way to ensure the operational safety of the car.
