Hybrid cooling system for aluminum engine block

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Hybrid cooling system for aluminum engine block

Suh, C.M. / Park, J.J.

New aluminum engine blocks with a unique cooling system of air assisted water cooling were developed. The basic design concept between cast iron and aluminum are the same, except for the design differences due to the structural stiffness of both materials. However, there are thermal property differences between aluminum and cast iron other than stiffness and weight. Therefore, the design method of the aluminum engine block was altered to take advantage of the thermal property. Practically, aviation and motor cycle engines use the air cooled aluminum block because of the lighter mass and high thermal conductivity of aluminum. This report describes a unique aluminum engine block for passenger vehicles. The cooling system is an air assisted water cooling method; the water jacket was shortened for upper core and thin fins replace lower part of core to dissipate the heat where the temperature is relatively low. This yields the reduction of radiator capacity and water pump size. It has also achieved significant reduction of block mass without loss of performance.