Seven major functions of engine lubricating oil

Lubricating oil plays multiple roles in mechanical equipment. Here are its main functions:

1. Lubrication function: Between rapidly sliding components such as pistons and cylinders, main shafts and bearing bushes, lubricating oil forms an oil film that separates the contact surfaces, thereby reducing wear on the parts.

2. Cooling effect: The engine oil absorbs and carries away heat, ultimately releasing it into the air, assisting the radiator in lowering the engine temperature.

3. Cleaning effect: High-quality engine oil can remove carbon deposits, sludge, and metal wear particles from engine components during circulation, maintaining the cleanliness of the parts' surfaces.

4. Sealing and Leak Prevention: The oil forms an effective seal between the piston rings and the piston, reducing gas leakage and blocking the intrusion of external contaminants.

5. Rust and Corrosion Prevention: Lubricating oil tightly adheres to the surface of parts, forming a protective film that isolates water, air, and harmful acidic substances.

6. Vibration Damping and Cushioning: Under high pressure, such as a sudden increase in cylinder port pressure, lubricating oil can transmit and disperse the impact loads on components like bearings.

7. Wear Resistance: The addition of lubricants to friction surfaces can reduce the coefficient of friction, thereby decreasing energy consumption and wear, particularly mitigating wear caused by abrasives, surface fatigue, and adhesion.