How does the engine cooling system work?

The engine cooling system is an important system to maintain the normal temperature of the engine and ensure the normal operation of the engine, and its function is to keep the engine within the appropriate temperature range under all working conditions. The cooling system is designed to prevent both the engine from overheating and the engine from overcooling in winter.

There are two ways of engine cooling: water-cooled and air-cooled, and now the general vehicle engine is water-cooled. The engine water-cooled cooling system is mainly composed of water pump, radiator, cooling fan, compensation water tank, thermostat, engine body, cylinder head water jacket and other parts.

How is it cooled? Mainly through the water pump to speed up the flow of coolant around the cylinder water jacket, through the driving natural wind and electric fan, the coolant is cooled in the radiator, the cooled coolant is introduced into the water jacket again, and the cycle is repeated to achieve the cooling of the engine.

In fact, in addition to the cooling effect on the engine, the cooling system also has the role of "heat preservation", because "overcooling" or "overheating" will affect the normal operation of the engine. This process is mainly to switch the "size cycle" of the engine cooling system through the thermostat. What is the size circulation of the cooling system? It can be simply understood that the coolant in the small circulation does not pass through the radiator, while the coolant in the large circulation passes through the radiator.