The function of the cooling system is to send out the heat absorbed by the heated parts in time to ensure that the engine works at the most appropriate temperature.The normal working temperature of automobile engine coolant is 80~ 90°C.

The thermostat is used to control the flow of cooling water through the radiator.The thermostat is installed in the channel of the cooling water circulation, and is generally installed at the outlet of the cylinder head.Usually there are two circulating flow routes of cooling water in the cooling system, one is a large circulation and the other is a small circulation.The large circulation is the circulation of water through the radiator when the water temperature is high;And the small circulation is when the water temperature is low, the water does not pass the radiator and the circulation flow, so that the water temperature quickly reaches the normal

When the impeller rotates, the water in the pump is driven by the impeller to rotate together. Under the action of centrifugal force, the water is thrown to the edge of the impeller, and the outlet pipe pressure in the tangent direction of the impeller on the shell is sent to the engine water jacket.At the same time, the pressure at the center of the impeller is reduced, and the water at the lower part of the radiator is sucked into the pump through the inlet pipe.Such continuous action makes the cooling water circulate continuously in the system.If the pump stops working because of a fault, the cold system will circulate continuously.If the pump stops working because of a fault, the cooling water can still flow between the blades and carry out natural circulation.