The auxiliary water pipe plays an important role in the cooling system of the automobile. It is usually called an expansion tank, and its main function is to balance the pressure of the tank. When the engine temperature rises, the liquid expands, and a part of the antifreeze flows into the auxiliary kettle through the water tank lid; When the temperature drops and the cooling system pressure is negative, the system inhales the antifreeze of the auxiliary kettle into the cooling system through the tank cover to maintain the normal operation of the system
The working principle of the auxiliary kettle water pipe is based on pressure balance. To be specific:
pressure balance : When the engine temperature rises and the coolant expands, the excess coolant flows into the auxiliary kettle through the tank lid to balance the system pressure.
pressure regulation : When the engine temperature drops and the system pressure becomes negative, the coolant in the auxiliary kettle is sucked into the cooling system through the tank cover to maintain the normal coolant level
