Automobile antifreeze is actually a chemical synthetic agent, as long as its purpose is to prevent the engine cooling system from freezing at low temperature and then dissipating heat. ?
Automobile antifreeze is also called "antifreeze" or "antifreeze". The full name should be automobile antifreeze, which means coolant with antifreeze function, so that the car can continue to be used even at low temperature in winter. Some substances that can lower the freezing point of water will be added to the engine coolant as antifreeze to prevent the cooling system from freezing in low temperature weather. ?
The engine cooling system of diesel locomotive is a liquid-cooled closed circulation system consisting of cylinder, water jacket and water tank. The working state of the cooling system directly affects the normal operation and service life of the vehicle. Antifreeze is the cooling medium of the circulating cooling system of internal combustion engine, which is mainly composed of antifreeze, corrosion inhibitor, defoamer, colorant, mildew inhibitor and buffer. ?
With the development of automobile industry, the requirements for engine performance are getting higher and higher. Antifreeze should not only have low freezing point and high boiling point, but also have good metal corrosion resistance, cavitation resistance and condensation resistance. It has comprehensive properties such as expansibility, low pollution or no pollution and long service life. Many countries have done a lot of research in this area, and constantly introduced formula patents and excellent antifreeze products.
The replacement cycle of coolant varies from manufacturer to manufacturer. Generally speaking, the replacement period of strong antifreeze is 8 years or 654.38+06 thousand kilometers, and the second replacement period is halved, that is, 4 years or 80 thousand kilometers. The replacement period of non-strong antifreeze is 4 years or 80 thousand kilometers, and the second replacement period is halved, that is, 2 years or 40 thousand kilometers.
Different automobile manufacturers have different coolant replacement cycles, but it is recommended that most car owners replace the coolant every 2 years or 40,000 kilometers. Of course, this replacement cycle is only a reference, because the driving conditions of each car are different, you can choose to replace it according to the actual use, and check the use of coolant in time. If it is found that the coolant is lower than the minimum scale value (the normal value of coolant should be between MAX and min), it must be added in time, otherwise it will affect the cooling performance of the engine.