oil, i.e. the engine lubricating oil, as the vehicle “blood”, can play a role in lubrication, cleaning, cooling, sealing, reducing wear, rust, corrosion and the like of the engine. The heart of the automobile engine, there are many metal surfaces in the engine friction motion, fast speed of movement of these components, the environment is poor, the working temperature up to 400 ° C to 600 ° C. In the face of such bad condition that only qualified lubricants available to reduce engine wear and tear parts, extended service life. .
describes a basic oil
oil, i.e., engine oil English name: Engine oil. Density of about 0.91 × 10³ (kg / m³) can lubricate the antifriction the engine, the cooling effect of the cooling, leak-proof seal, rust corrosion, shock buffering. Oil on the market because of their different base oils can be simply divided into two kinds of mineral and synthetic oils (vegetable oil production due to scarce so do not count). Synthetic oil is divided into: fully synthetic and semi-synthetic. Fully synthetic motor oil is the highest level.
composed of two parts oil base oil and additives. Lubricant base oil is the main component, determine the basic properties of the lubricating oil, addAgents can make up for the deficiencies and improve the performance of the base oil to give some new properties, it is an important part of the lubricating oil.
oil
2. Lubricant Additives [123 ] additive is the essence of modern senior oil, adding the correct selection and reasonable, can improve their physical and chemical properties of the lubricating oil to give new special features, or enhance its original has some performance to meet higher requirements. Depending on the quality and performance requirements of lubricants, additives for carefully selected, carefully balanced, reasonable allocation, is the key to ensure the quality of lubricating oil.
The main types of the additives
detergents, dispersants, anti corrosion agents, antiwear agents, oiliness agents, friction modifiers, viscosity index improvers agents, rust inhibitors, pour point depressants, anti-foaming agents, demulsifiers, emulsifiers and the like.
3. Lubricating base oil
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1 classified according to the viscosity index, it can be divided, low viscosity index (VIlt; 40), the viscosity index (40≤VIlt; 90), high viscosity index (90≤VIlt; 120), a high viscosity index ( 120≤VIlt; 140), ultra high viscosity index (VI≥140).
2. Press range, the base oil into base oil general and special base oils.