Diesel Engine Support Systems : Engine Cooling
A diesel engine requires five supporting systems in order to operate: cooling, lubrication, fuel injection, air intake, and exhaust. Depending on the size, power, and application of the diesel, these systems vary in size and complexity.
Nearly all diesel engines rely on a liquid cooling system to transfer waste heat out of the block and internals as shown in Figure above. The cooling system consists of a closed loop similar to that of a car engine and contains the following major components: water pump, radiator or heat exchanger, water jacket (which consists of coolant passages in the block and heads), and a thermostat.
