When the engine is working, each moving part acts on another part with a certain force, and high-speed relative movement occurs. With relative movement, the surface of the part will inevitably produce friction and accelerate wear. Therefore, in order to reduce wear, reduce frictional resistance, and extend service life, a lubrication system must be installed on the engine.
The function of the lubrication system is to continuously deliver sufficient amount of clean oil at a suitable temperature to the friction surfaces of all transmission parts when the engine is working, and form an oil film between the friction surfaces to achieve liquid friction, thereby reducing frictional resistance and reducing Power consumption, reduce the wear and tear of mechanical parts, in order to achieve the purpose of improving the reliability and durability of the engine. There are three ways of lubrication: pressure lubrication, splash lubrication and grease lubrication.