延缓润滑油在使用时变质的六项措施（Six measures to retard deterioration of lubricating oils in use）.doc

延缓润滑油在使用时变质的六项措施（Six measures to retard deterioration of lubricating oils in use） Gasoline engine and diesel engine lubricating oil in the process of working with higher temperature components, such as cylinders, pistons and other contacts, but also by the impact of high temperature gas, and its working conditions are relatively dutch. In recent years, the automobile compression ratio increases, the load increases, therefore, the demand for lubricating oil is higher and higher, in use, the lubricant is also more perishable. As a result of deterioration of the lubricant, it not only shortens the service life of the lubricant, but also damages the engine. Therefore, measures need to be taken to delay the deterioration of the lubricant at the engines work. First, the use of quality meet the requirements of lubricants. Lubricating oil quality is good or bad for its use, and it is very easy to deteriorate. When lubricating oil is used in a diesel engine or gasoline engine, the properties related to the tendency of deterioration are viscosity, detergency, dispersion, oxygen resistance and corrosion resistance. The viscosity is too large, the film ring region, the piston skirt and the inner cavity of the piston in the formation of more; viscosity is too small, then the cylinder and piston ring seal, the lubricating oil by fuel oil dilution gas into the crankcase, the lubricating oil is easy to precipitate. Therefore, it must be used in accordance with the provisions of a certain viscosity of the lubricating oil. When cleaning and dispersing are bad, it is easy to produce film and precipitate. A gum film is a sticky substance. The piston ring can be bonded in the piston ring groove to lose elasticity and can not be sealed, so as to speed up dilution and precipitation of the lubricating oil. The detergency and dispersion of lubricating oils are mainly improved by adding detergent dispersant. Therefore, automotive engine lubricants need to add detergent dispersant, otherwise