The Charge Air Cooler Tubes (intercooler tube) is the core heat exchange channel of the charge air cooler (intercooler). Through forced convection heat exchange, it cools the high-temperature compressed air discharged from the turbocharger, increases air density and oxygen content, and ensures efficient and stable operation of the engine.
1、 Core working principle (complete process)
High temperature air generation: When the turbocharger compresses air, the air temperature rises to 150-200 ℃ due to molecular compression friction and high-temperature conduction from the turbine, resulting in a significant decrease in density and insufficient oxygen content.
Air enters the cooler tube: High temperature and high pressure air flows from the outlet of the turbocharger into multiple parallel cooling tubes (mostly aluminum alloy flat tubes) of the intercooler.
Heat Transfer and Cooling (Core)
Air air cooling (mainstream): The cooling pipe is densely covered with heat dissipation fins, and the cold air driven by the vehicle or fan passes horizontally between the fins and the pipe. The heat of the hot air inside the pipe is quickly conducted to the fins through the pipe wall, and then carried away by the cold air, resulting in a significant decrease in air temperature.
Air water cooling (high-performance/compact scenario): The cooling pipe is externally connected to the engine coolant or independently circulated cold water, directly absorbing the heat from the air inside the pipe, resulting in higher cooling efficiency.
Cooling air output: After cooling, high-density and high oxygen content air flows out of the cooling pipe and enters the engine intake manifold through the pipeline to participate in more complete combustion.
2、 The key role of cooler tubes
Increase air density: For every 10 ℃ decrease in temperature, the air density increases by about 3%, and the intake volume and power output increase synchronously (usually by 5% -10%).
Suppressing detonation: Lowering the intake temperature to prevent gasoline pre combustion and detonation caused by combustion chamber overheating, and protecting engine pistons, connecting rods, and other components.
Reduce heat load: Reduce engine high temperature conditions and extend the life of components such as turbines and cylinder blocks.
Optimize emissions: Reduce emissions of unburned hydrocarbons, NO ₓ and other pollutants through more thorough combustion.
3、 Key points of structure and materials
Structure: It is mostly a flat porous tube (increasing heat transfer area and reducing wind resistance), with two ends connected to the collection chamber, and heat dissipation fins welded/brazed between the tubes to form a compact heat transfer core.
Material: The mainstream is aluminum alloy (with good thermal conductivity, lightweight, and corrosion resistance); Stainless steel is used for high-performance scenarios, balancing strength and high temperature resistance.
