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1 the inflation coefficient of the engine drops
The higher the temperature, the smaller the air density, the actual intake of the engine is reduced; because the engine is over heat, the temperature in the engine hood is higher, and the inflation ability of the engine is reduced. Inflation coefficient decreased, causing the engine power to decline, so that the car running. In addition, due to the decline of the inflation coefficient, the relative concentration of the mixed gas, the concentration of harmful substances (CO, HC, NOX, carbon smoke) in the automobile exhaust is increased, and the environment pollution is increased.
2 engine combustion is not normal
The air temperature is high, the temperature of the mixed gas in the cylinder of the engine is high, the whole work cycle temperature is high, and the cooling efficiency of Baotou beiben radiator accessories is also low, so that the engine is overheating, the combustion chamber at the end of the mixed gas receiving heat, intensifying pre flame reaction, which is easy to occur. In addition, the overheated engine accumulate in the top of the piston, the top wall of the combustion chamber, valve and spark plug on the formation of carbon deposition on the hot, easy to cause the early burning combustible mixture. This abnormal combustion, exacerbated by overheating, the engine cylinder body and cover form a vicious spiral, easy to produce thermal deformation or cracks, the more common is the burning cylinder pad, valve and valve seat.
3 oil deterioration
Engine oil at high temperature, high pressure, the oxidation stability of the deterioration of the oil, exacerbated by its thermal decomposition, oxidation and polymerization process. Oil and incomplete combustion products, condensation of water vapor and air entrained in the dust mixture, causing deterioration of oil. In addition, because the oil temperature is high, the viscosity decreased, the oil becomes thinner, the oil becomes worse, the oil pressure is reduced, and the surface of the engine parts is not easy to form a lubricating oil film. At the same time, due to the high temperature thermal expansion of the metal parts, the normal clearance between the parts becomes smaller. These accelerate parts wear, seriously affected the Baotou beiben parts of the service life of the engine.
4 the oil supply system is prone to air resistance
The higher the temperature, the higher the temperature of the engine hood, the more easy to produce gas resistance phenomenon. The fuel supply system after heating, gas evaporated into gas in the oil and gasoline pump, not only increases the flow resistance of gasoline at the same time, due to the compressibility of gas, the fuel pump tubing in oil vapor with fluctuating pressure fuel pump is constantly compression and expansion, destruction of the gasoline pump formed in oil travel in the vacuum, causing the engine oil supply shortage or interruption, the formation of oil supply system, air resistance. This phenomenon is more likely to occur in hot areas, especially when the car is fully loaded with climbing or moving at a low speed for a long time.
5 ignition system is not working properly
The car in the high temperature environment, because Baotou beiben parts overheated high-voltage spark ignition coil is weakened, prone to high engine flameout phenomenon. Serious when the ignition coil burned, affect the normal running of the vehicle.