The function of intercooler in engine and its necessity

The function of intercooler in engine and its necessity

The function of intercooler is to reduce the intake temperature of engine. So why reduce the intake air temperature?

(1) The temperature of the exhaust gas discharged from the engine is very high, and the heat conduction through the supercharger will increase the temperature of the intake air. Moreover, the density of the air will increase in the process of being compressed, which will also lead to the increase of the temperature of the air discharged from the supercharger. With the increase of the air pressure, but the oxygen density decreases, which will affect the effective inflation efficiency of the engine. If you want to further improve the inflation efficiency, you need to reduce the intake air temperature. Some data show that under the same air-fuel ratio, the engine power can be increased by 3% ~ 5% for every 10 ℃ decrease in the temperature of the charge air.

(2) If the uncooled charge air enters the combustion chamber, it will not only affect the inflation efficiency of the engine, but also easily lead to excessive engine combustion temperature, knock and other faults, but also increase the content of NOx in the engine exhaust gas and cause air pollution.

In order to solve the adverse effect caused by the temperature rise of the pressurized air, an intercooler needs to be installed to reduce the intake temperature..

(3) Reduce engine fuel consumption.

(4) Improve the adaptability to altitude. In high altitude areas, the compressor with higher pressure ratio can be used when intercooling is adopted, which makes the engine obtain higher power and improves the adaptability of the vehicle.

(5) Improve the matching and adaptability of supercharger.