What Is The Function of The Car Expansion Kettle?

The function of the car expansion kettle is mainly to discharge the gas in the cooling system, supply coolant to the cooling system, increase the pressure of the cooling system to increase the pressure of the water pump, and prevent the harm of water pump cavitation.

The car expansion kettle, also known as the expansion tank, is an important part of the car cooling system. Its main functions include:

1. Gas discharge and coolant supply: The expansion kettle can discharge the gas in the cooling system and replenish the cooling system with an appropriate amount of coolant. This helps to maintain the normal operation of the cooling system and ensure that the engine runs in the best working condition.

2. Increase the pressure of the water pump: By increasing the pressure of the cooling system, the expansion kettle can increase the pressure of the water pump, thereby effectively delivering coolant to various parts of the engine and maintaining the proper temperature of the engine.

3. Prevent water pump cavitation: Cavitation is caused by the sudden release of dissolved gas in the liquid under high pressure, which will cause pitting on the surface of the impeller and water jacket of the water pump, thereby affecting the normal operation of the water pump. The expansion kettle effectively prevents this from happening by stabilizing the pressure in the system.

4. Stabilize system pressure: The expansion kettle also has the function of stabilizing the pressure of the cooling system. By absorbing and releasing pressure, the water pressure is kept stable to ensure the normal operation of the water pump.

5. Water-gas separation: The expansion kettle can store water vapor from the radiator and the engine water channel, and return it after cooling to balance the system pressure. This helps prevent air blockage in the system and keep the cooling system in good working condition.

6. Replenish coolant and prevent cavitation: The water replenishment function of the expansion kettle can replenish coolant in time on the side where the water pump absorbs water, reduce the generation of steam bubbles, and thus prevent cavitation.

7. Pressure relief to prevent excessive system pressure: When the system pressure exceeds the specified value, the lid of the expansion kettle has a pressure relief function, which can timely remove the system pressure to avoid serious consequences.

In summary, the automotive expansion kettle plays a vital role in maintaining the normal operation of the engine, protecting the engine from damage, and ensuring the stability and efficiency of the cooling system.