The working principles of an intercooler (charge air cooler) are primarily based on Thermodynamics, Heat Transfer, and Gas Laws. In a diesel truck, the intercooler cools the compressed air leaving the turbocharger before it enters the engine.

Cooling the charge air can:

• Increase oxygen available for combustion.
• Improve fuel combustion.
• Increase engine power potential.
• Reduce exhaust gas temperatures.
• Help reduce thermal stress.
• Improve fuel efficiency under appropriate operating conditions.
• Allow the turbocharger to provide higher-density air without simply increasing intake temperature.

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