Pressurized air from the turbocharger is cooled by the _______ before it enters the combustion chamber

• A. Aftercooler
• B. Intercooler
• C. Radiator
• D. Condenser

Answer: (A)

Compressing air with a turbocharger heats it up, and hot air is less dense and can reduce engine efficiency. Cooling that compressed air before it enters the combustion chamber increases its density, which improves combustion, power, and efficiency while reducing the chance of pre-ignition. The device that does this cooling is placed after the turbocharger and before the intake manifold, called the aftercooler. In many systems this is a type of intercooler, but the term used here is aftercooler. The radiator cools engine coolant, not the charge air, and the condenser is part of the air-conditioning system, not the turbocharged air path.