Classification, main functions and performance of lubricating oil for heavy-duty vehicles At present, lubricating oils for heavy-duty vehicles can be divided into diesel engine lubricating oil according to their purpose (heavy vehicles are mostly diesel engine vehicles, and only diesel engine lubricating oil is introduced here), gear oil and grease Three categories. The main function and performance of diesel engine lubricating oil. The main function of diesel engine lubricating oil, anti-friction effect Diesel engine lubricating oil must be able to reduce the friction of all parts of the engine, prevent excessive wear between the contact points of metal parts, and ensure the normal operation of the engine. Purifying and dispersing effect. Due to the high sulfur content and soot content of diesel fuel during combustion, there are more insoluble components in the engine oil. When the deposits formed by these substances block the engine piston ring, it will affect the normal operation of the engine, so the diesel engine The lubricating oil must have a good dispersing and cleaning effect to prevent the insoluble matter in the oil from forming attached sludge. Sealing function Diesel engine lubricating oil must have a sealing effect on the engine to prevent the leakage of exhaust gas generated by the fuel in the engine’s combustion chamber and affect the normal operation of the engine.
Cooling The engine will generate a lot of heat during the working process, and the generated heat must be taken away in time to prevent the engine from overheating and affecting the normal operation, so the engine lubricating oil must have a cooling effect on the engine. Corrosion will occur to the parts of the engine, which requires that the engine lubricating oil must have an excellent anti-corrosion effect to prevent combustion products such as acid and water from corroding all parts of the engine. In addition to the above main functions, diesel engine lubricating oil also has the functions of auxiliary power transmission and vibration reduction. The main performance of diesel engine lubricating oil Diesel engine lubricating oil must prevent the corrosion and wear of engine parts, maintain the quality of each part, and ensure the smooth operation of the engine. At the same time, it must also meet the requirements of economical application. Therefore, diesel engine lubricating oil must have performance. Having a higher viscosity index Viscosity index is an expression method of the relationship between the viscosity of lubricating oil and temperature. The greater the viscosity index, the less the viscosity of lubricating oil is affected by temperature.
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