Automotive engine cooling system in the car power system has a vital role in the engine as the human heart, if not properly protected will be threatened, and the cooling system can work in the engine to adjust the temperature and reasonable control, so that The engine components Sensor are kept at normal operating temperatures to achieve the ideal power output and good fuel economy. Without the help of the cooling system, the engine will not work properly.
The function of the car engine cooling system is to take away the engine heat generated by the combustion, so that the engine maintained in the normal operating temperature range. In all cases, to ensure that the engine at the most appropriate temperature, the cooling system to match and set the appropriate will directly affect the engine power performance, service life and fuel economy. In all vehicle failures, the engine cooling system has the highest failure rate. Thus, the cooling system plays Temperature Sensor an important role in the engine. Engine in accordance with the cooling method can be divided into air-cooled engine and water-cooled engine, air-cooled engine is driven by the engine fan and vehicle air flow to cool the engine; water-cooled engine is by the cooling water in the engine cycle to cool engine. Regardless of the way in which the cooling system, the normal cooling system must ensure that the engine in a variety of driving environment are not overheated.
The cooling system of the automobile engine is an important part to keep the engine working properly. If the maintenance rate of the engine cooling system is high, the other parts of the engine will be damaged and the overall working capacity of the engine will be affected. Therefore, the maintenance of the automobile engine cooling system And maintenance is particularly important, the coolant refers to the clean water, not what water can be used as a coolant, the more delicate the higher the requirements of the car on the water quality. For example, the clear spring, although clear, looks clean, but the spring contains a lot of minerals, if added to the engine cooling system, it will produce a lot of scale, affecting the normal role of the cooling system play, we can see, coolant Water quality is very important, the international commonly used glycol-type coolant is in the softened water Throttle Position Sensor in proportion to add antifreeze glycol, together with the right amount of metal corrosion inhibitor, scale inhibitor and other additives to reconcile the scientific , To winter antifreeze, summer anti-boiling, and can prevent corrosion, anti-scale and so on.
1, antifreeze. Coolers formulated with ethylene glycol can be used at temperatures up to -70 ° C. Market sales of coolant, ethylene glycol concentration is generally maintained at 33 ~ 50%, that is, freezing point between -20 ℃ ~ -45 ℃, often according to the actual needs of different regions to choose a reasonable to meet the requirements.
2, anti-boiling. The addition of ethylene glycol to the water changes the boiling point of the coolant. The higher the ethylene glycol concentration, the higher the boiling point of the coolant, the boiling point of the coolant at -20 ° C is 104.5 ° C and the boiling point at 108 ° C at -50 ° C. If the cooling system uses a pressure cap, the actual boiling point of the coolant will be higher, even in the hot summer, but also can effectively prevent the coolant 'boil'.
3, anti-corrosion. The main function of the coolant is anti-corrosion. Corrosion is a chemical, electrochemical and etch effect that gradually destroys the metal surface within the cooling system, which can cause the walls of the cooling system to perforate, causing the coolant to leak and cause damage to the engine. The use of deionized water and the appropriate additives to prevent the emergence of various corrosion.
4, rust. Corrosion is due to the oxidation of the cooling system. Heat and moisture to accelerate the process of corrosion. The residuals left by the rust will block the cooling system, accelerate wear and reduce the heat transfer efficiency. The additives in the coolant help prevent the presence of corrosion in the cooling system channel.
5, anti-scaling. The various impurities contained in the water source, including metal ions, inorganic salts, etc., determines the formation of fouling and precipitation, will greatly reduce the thermal conductivity of the cooling system, in many cases will cause serious damage to the engine. The deionized water used in the coolant prevents the formation of fouling and precipitation, thereby protecting the engine.
It is equivalent to the engine combustion chamber around the waterway, when the engine generates a lot of heat, the cylinder water jacket will play Pressure Switch the role of cooling in the engine, water and oil pipelines are clear, non-interference, if found in the coolant oil Indicating that the waterway and oil path occurred perforation phenomenon, once this happens, the water temperature table will rise sharply, then we must take timely measures.