What kind of engine cooling system is used in the HMMWV?

The HMMWV is equipped with a liquid-cooled engine cooling system. This system uses a liquid coolant, typically water mixed with antifreeze, to absorb heat from the engine and dissipate it through a radiator. Liquid cooling is effective for maintaining optimal operating temperatures in a variety of conditions, as it allows for more efficient heat transfer compared to air-cooled systems. The ability of the liquid cooling system to handle higher heat loads makes it particularly suitable for the demands placed on the HMMWV during operations.

Other cooling methods, such as air-cooling, lack the efficiency and cooling capacity required for heavy-duty applications like those encountered in military vehicles. Oil cooling is used in some applications, but it does not provide the primary cooling for the engine itself. Fan-cooling refers to a component of the system that assists in drawing air through the radiator but is not a standalone engine cooling method. Thus, the liquid-cooled system is integral to the HMMWV’s performance and reliability.