Advantages Of Charge Air Cooling

Air delivered to the induction- manifold from the turbocharger is subjected to

reserve-flow pressure pulsation and turbulence, and results in considerable amount of heat.

Now engine power is dependent principally upon the mass of air drawn into the cylinder per

cycle, and increasing the charge pressure ratio alone will not permit the maximum quantity of

charge to enter the cylinder. In fact, the true measure of power potential is the density of the

charge in the cylinder and this relates directly to the temperature of the air charge about to

enter the cylinder. The lower the charge temperature at given constant pressure the smaller

will be its volume and hence more air charge is able to enter the cylinder. Heat –exchangers

of

I. ADVANTAGES OF CHARGE AIR-COOLING

a. Increased Output:

temperature is available for combustion, more fuel can be burnt resulting in more BHP. Since

this is the most cost effective way of increasing the power of given engine, many engine

designers have utilized charge air-cooling in trucks, farm equipment, marine units and other

b. Reduced thermal loading:

reduced temperature level in piston could put it in the favorable portion of the strength vs.

temperature curve. Thus, conventional aluminum pistons could be used in high output, charge

air-cooled. Where as in non- charge air-cooled engine iron or gallery cooled pistons may be

It has been observed by some authors that when a charge air cooler is used, the decrease in

thermal loading and heat rejection to the coolant offsets the heat rejection to coolant in the

charge air cooler. The net result is reduced thermal loading of the components at essentially

the same total heat rejection to the coolant.

c. Reduced exhaust emissions:

independent variable in NOx formation. Figure demonstrates the effect of intake