Classification, main function and performance of heavy-duty automotive lubricants

Classification, main function and performance of heavy-duty automotive lubricants. Currently, heavy-duty automotive lubricants can be classified into diesel engine lubricants according to their use (heavy duty vehicles are mostly diesel engine vehicles, only diesel engine lubricants are introduced here), gear oils and greases. Three categories. The main function and performance of diesel engine lubricating oil. The main role of diesel engine lubricating oil, anti-friction diesel engine oil must be able to reduce friction in various parts of the engine to prevent excessive wear between the metal parts of the contact point, to ensure the normal operation of the engine. Clean Dispersion Due to the large amount of sulfur and soot in the diesel fuel combustion, the insoluble components in the oil are more. When the deposits formed by these substances block the piston rings of the engine, it will affect the normal operation of the engine. Lubricating oil must have good dispersion and washing to prevent insoluble matter in the oil from forming an adherent sludge. Sealing function The diesel engine oil must have a sealing effect on the engine to prevent the exhaust gas produced by the fuel in the engine combustion chamber from leaking and affecting the normal operation of the engine.

Cooling The engine generates a lot of heat during its operation. The heat generated must be taken away in time to prevent the engine from overheating and affecting normal operation. Therefore, the engine oil must have a cooling effect on the engine. Corrosion can occur on parts of the engine, which requires the engine lubricating oil to have excellent anti-corrosion to prevent the combustion products such as acid and water from corroding the engine parts. In addition to the above main functions, diesel engine lubricating oil also has auxiliary transmission power and vibration damping. The main performance of diesel engine lubricating oil Diesel engine lubricating oil to prevent corrosion and wear of engine parts, to maintain the quality of various parts and ensure the smooth operation of the engine, but also must meet the economic requirements, so diesel engine oil must have performance. Having a higher viscosity index Viscosity index is a representation of the relationship between viscosity and temperature of a lubricating oil. The greater the viscosity index, the less affected the viscosity of the lubricating oil by temperature.