Many friends are aware of the need to change oil for vehicle maintenance, but many do not know what the role of oil is and how to select it. Today, ga will introduce you to the engine oil
Automobile lubricants can generally be divided into three categories because of their different functions: engine oil, speedbox and differential oil, and lubricant (yellow). The largest number of vehicle maintenance was in the replacement of engine oil。
The oil has five functions
Lubrication function: the function of oil is to fill and lubricate parts'surfaces and to reduce friction between parts of a moving unit. It works on the basis that the oil is transported through the pump to the parts ' rotation through pressure, that it is separated from the two surfaces by forming a film, and that it reduces the contact surface between parts of a moving unit, thereby reducing wear and tear and extending the useful life of the parts. Surface friction between pistons and gas cylinders, rotor collages, cams, gear rotors, etc. Are present in the work movement and organic oil is required to lubricate to ensure normal working conditions。
Refrigeration function: the oils are able to bring back some of the heat generated between the transformers of the motors ' work to the oil crust, reaching the cooling effect of the dissipation through the shell walls, and in some cases the engines are equipped with specialized oil radiators to achieve better cooling effects in order to protect the normal temperature between the transformers of the motors, so that the engines can remain in normal working condition for long periods of time。
Seal function: the oil also has a seal function, such as filling the piston ring of the engine with the cylinder wall by filling it with a lubrication function and sealing the gap between its contact surface and the gas cylinder, which reduces the leak during inhalation, compression and ensures a normal compression ratio. If there is some wear in the piston rings and the walls of the tank, the sealing of the oil can be improved by adjusting the viscosity of the oil or by adding oil additives, thereby improving the working condition of the engine。
Cleaning function: while oils are pumped through oil pumps to lubricate and heat between parts ' transformers, they can also have a wash-cleaning effect on parts'surfaces, bring small particles of dust into the engine and the waste generated by the work into the shell, and keep engine parts clean and smooth, shifting the work surface and the oil lanes through the oil collection network, oil filters and filters to ensure normal engine operations。
Rustproof function: the complexity of the engine's working environment and climate change in the spring, summer and autumn winters can easily deform metal parts, affect the normal operation of the engine and reduce its useful life. The oils are pumped through the oil channels to allow spare parts and metallic surfaces to form a membrane insulation of the air, which prevents the oxidation of the surface of metals and increases the operational life of engines。
If the engine is compared to the car's heart, the oil is the engine's blood and is a necessary condition for the engine to function properly. Knowledge of engine oil, proper selection of engine oil and regular replacement maintenance are essential to ensure that the engine works properly and extends its useful life。
