"Summed up": An intercooler (original UK term, sometimes aftercooler in US practice), or charge air cooler, is an air-to-air or air-to-liquid heat exchange device used on turbocharged and supercharged (forced induction) internal combustion engines to improve their volumetric efficiency by increasing intake air charge density through nearly isobaric (constant pressure) cooling. A decrease in air intake temperature provides a denser intake charge to the engine and allows more air and fuel to be combusted per engine cycle, increasing the output of the engine.
Taken from here
Basically: cools air, aair denser as it's cooler, more "air particles" per unit space available, so fuel combusts more completely, improving efficiency.
Taken from here
Basically: cools air, aair denser as it's cooler, more "air particles" per unit space available, so fuel combusts more completely, improving efficiency.
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