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What is the lubrication principle of engine oil?

1 Answers

EdwardMarie

07/29/25 3:51pm

The lubrication principle of an engine involves the main oil pump drawing lubricating oil from the oil pan and then pumping it into the oil cooler. The cooled lubricating oil passes through the oil filter for purification before entering the main oil pipe at the lower part of the engine block. Under pressure, it is then delivered to various lubrication points. The functions of the lubrication system include: Lubrication: Lubricating the surfaces of moving parts to reduce friction resistance and wear, thereby decreasing engine power consumption. Cleaning: The continuous circulation of oil within the lubrication system cleans friction surfaces, carrying away wear debris and other foreign particles. Cooling: The continuous circulation of oil also carries away heat generated by friction, serving a cooling function. Sealing: Forming an oil film between moving parts enhances their sealing properties, helping to prevent gas or oil leaks. Anti-corrosion: The oil film formed on part surfaces protects them from corrosion and rust. Hydraulic function: Lubricating oil can also serve as hydraulic fluid, such as in hydraulic lifters, providing hydraulic pressure. Vibration damping: The oil film formed on moving part surfaces absorbs impacts and reduces vibration, serving as a shock absorber. Lubrication methods include: Pressure lubrication, splash lubrication, and periodic lubrication.

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