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The main function of a diesel engine cooling system is to effectively control and regulate the engine's operating temperature. Maintaining normal operating temperatures is essential for the proper operation of the engine. If the engine is overheated or too cold, its performance and life will be affected. Here are a few important functions of the cooling system:

Maintaining a stable engine temperature: The cooling system absorbs and dissipates heat by circulating coolant (usually a mixture of water and antifreeze) to ensure that the engine's operating temperature remains within the optimal range; Preventing the engine from overheating: The engine generates a lot of heat during operation. If there is no cooling system to dissipate the heat in time, the engine may overheat, causing oil deterioration, seal aging, and even damage to important engine components; Improving fuel efficiency: Proper engine temperature helps complete combustion of fuel, thereby improving fuel efficiency and reducing emissions; Prolonging engine life: Maintaining the proper operating temperature can reduce wear and corrosion of engine components and extend the service life of the engine.

The diesel engine cooling system usually includes the following key components:

Water pump: The water pump drives the cooling liquid to circulate so as to effectively absorb and dissipate heat; Radiator: The radiator located in front of the engine cools down the coolant through the fan and recirculates it into the engine; Fan: Automatically or manually started according to the engine temperature to enhance the cooling effect of the radiator; Coolant: Usually a mixture of water and antifreeze, it has antifreeze, anti-corrosion and good thermal conductivity.

The working principle can be simply summarized as follows: the water pump pushes the coolant into the engine, the coolant absorbs the heat generated by the engine and flows back to the radiator, dissipates the heat through the cooling effect of the radiator, and then circulates back to the engine, and so on.