Why do turbocharged engines use intercoolers?

[ColemanRose]

Turbocharged engines use intercoolers because the turbocharger compresses the air, which raises its temperature. If the intake air temperature is too high, it can cause engine knocking, affecting both power output and fuel economy. Therefore, an intercooler is designed to cool the intake air of the turbocharged engine. A turbocharged engine refers to an engine equipped with a turbocharger, which is essentially an air compressor that increases the intake air volume by compressing air. The turbocharger utilizes the inertial force of exhaust gases to drive the turbine in the turbine housing, which in turn drives the coaxial impeller. The impeller then pressurizes the air delivered from the air filter pipe, forcing it into the cylinders under increased pressure.