An
intercooler, or
charge air cooler, is a device used on
turbocharged and
supercharged internal combustion engines to improve their
volumetric efficiency by increasing the amount of charge in the engine and lowering charge air temperature thereby increasing power and reliability. It is also known as a
charge air cooler, especially on larger engines that may easily self-destruct with high intake-air temperatures. The
inter in the name refers to its location compared to the
compressors; the coolers were typically installed between multiple stages of supercharging in
aircraft engines. Modern
automobile designs are technically
aftercoolers because they appear most often at the very end of the chain, but this term is no longer used. Also the thicker and large the Intercooler, the more Turbo Lag it produces.