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It is to control the intake air temperature and maintain a good combustion effect.
Intercoolers are generally only visible when turbocharged vehicles are installed. Because the intercooler is actually a turbocharged kit, its role is to increase the efficiency of the engine's ventilation.
Why a turbocharged engine has more power than a normal engine, one of the reasons is that the efficiency of its ventilation is higher than that of a normal engine. When the air enters the turbocharger, its temperature will increase greatly, and the density will also become smaller. The intercooler will play the role of cooling air. The high-temperature air will be cooled by the intercooler and then enter the engine. If there is no intercooler and the pressurized high-temperature air enters the engine directly, the engine will be damaged or even die of fire due to the high air temperature.
For supercharged engines, the intercooler is an important component of the booster system. Whether it is a supercharged engine or a turbocharged engine, an intercooler needs to be installed between the supercharger and the intake manifold of the engine. The turbocharged engine is used as an example to briefly introduce the intercooler.
The role of the intercooler
The role of the intercooler is to reduce the intake air temperature of the engine. So why reduce the intake air temperature?
(1) The temperature of the exhaust gas emitted by the engine is very high, and the heat conduction through the supercharger increases the temperature of the intake air. Moreover, the density of the air will increase during the compression process, which will inevitably lead to an increase in air temperature, thereby affecting the engine's inflation efficiency. If you want to further improve the efficiency of the gas, we must reduce the intake temperature. The data shows that under the same air-fuel ratio, the engine power can be increased by 3% to 5% for every 10°C decrease in the charge air temperature.
(2) If uncooled charge air enters the combustion chamber, besides affecting the engine's charging efficiency, it can easily cause the engine's combustion temperature to be too high, causing knock and other failures, and it will increase the NOx content in engine exhaust gas. , causing air pollution.
In order to solve the adverse effects caused by the increase in air temperature after pressurization, it is necessary to install an intercooler to reduce the intake air temperature.
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What is cold pressurization and its role
Pressurized intercooling technology is when the turbocharger compresses fresh air through the mid-range cooler and then flows through the intake manifold and intake valve to the cylinder combustion chamber. Effective intercooling technology allows boost temperature to drop below 50°C, helping to reduce exhaust emissions and improve fuel economy.