Intercooler

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What are intercoolers responsible for. I see on the fotos they are just stick on the front of the car/...... Is it connected to anything that works or is it just there to push air???

posted by  mumin

go to howstuffworks.com, that will be the easiest way for you to learn, plus you can learn how turbo's and superchagers work....that way you will be a little more informed when discussions come up regarding any of those topics

posted by  Sick88Tbird

They are an air to air heat exchanger. They reduce the temperature of the air from the turbocharger compressor. The temperature of the air from the compressor is elevated due to heat of compression.

Air from the compressor feeds into the intecooler. Air passing over the outside of the intercooler is generally a lower temperature than the air entering from the compressor, so heat transfer takes place.

A charge cooler uses water as the cooling medium (usually close to freezing).

posted by  Wally

What hasn't been explained is why the intercooler (a.k.a. "aftercooler") is there in the first place...

Turbochargers (and superchargers) are used to raise the pressure of the intake air charge somewhat above the ambient pressure. This is done to aid in getting the air charge into the cylinders. Without the boost in air charge pressure, the air flow into the cylinders is the result of the difference between the cylinder's low pressure and the ambient pressure. Cylinder scavenging is not as complete as it could be, as it occurs only during the valve overlap period. In addition, major changes in ambient air pressure will have significant effect on engine performance, as it is the variable that determines the actual mass of air available to support combustion. Applying some sort of air charge pressure boost improves scavenging and provides for a more consistent pressure differential.

However, applying the boost has a negative effect on air density, and the process of compressing the intake air raises the temperature of the air charge. This in turn causes a reduction in the density. Cooling the pressurized air increases the air density, thus allowing for the maximum mass of air to be drawn into each cylinder.

It's really pretty simple -- there are more air molecules in a given volume of lower temperature air at any given pressure than there are in the same volume of air at the same pressure but at a higher temperature... :)

posted by  cpprioli

That could be a bit misleading. With or without an intercooler the number of mols found at the discharge of the compressor does not change for a constant flow/pressure at the discharge. Compressing a gas will always raise the density. If however you take advantage of the intercooler and increase your compressor mass flow rate you will obviously increase density.

posted by  Wally

:thumbs: Very true, compressing will make the air molecues closer to each other and packed in.but it will also make the moelecues move around much more which is why compression gets air hotter. And if that air is more colder, the molecues are not moving around as much so they are packed together.

posted by  CarEXPERT

you must be reading more young man.. keep up the good shit and we'll make a tech out of you one day

posted by  BanffAutoSpa_ap

so if you inject liquid nitrogen into the intercooler ,it would work better,or should races be held at 1200 feet below sea level?

posted by  the lobster

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