How the expansion lid works. How to tell if the lid of the expansion kettle is broken?
The working principle of the expanding lid mainly depends on the steam valve on the lid. When the internal pressure of the cooling system exceeds the opening pressure of the steam valve on the lid (0.12MPa), the steam valve will automatically open, making the radiator work. In this way, the hot steam in the reservoir is dispersed into a large cooling cycle. This process can effectively reduce the temperature around the engine , thus ensuring the normal operation of the engine. At the same time, if the pressure is too high or the antifreeze is excessive, the excess gas and antifreeze will flow out of the by-pass water channel of the expansion pot to prevent the cooling system from being too high and causing the adverse consequences of tube explosion.
Principle of thermal expansion and cold contraction: Automobile expansion pot uses the thermal expansion and cold contraction characteristics of substances. When the engine is running, the coolant expands when heated in the radiator and increases the pressure in the system. When the engine is turned off, the coolant will gradually cool and reduce the volume, and the pressure will be reduced.
Location of the expansion pot: The expansion pot is usually installed in the engine compartment, near the top of the engine. It is connected to the radiator by a hose that feeds coolant from the expansion pot into the engine and back to the radiator.
Adjust the total amount of coolant: There is a pressure regulating valve in the expansion pot, which will adjust the total amount of coolant according to the change of system pressure. As the engine coolant expands, the pressure regulating valve opens, allowing excess coolant to be released through the vent. When the engine is turned off and the pressure is low, the valve closes to prevent air from entering the cooling system.
Maintain a constant coolant pressure: The expansion pot also acts to maintain a constant pressure in the cooling system. When the engine is running, the high-pressure coolant will enter the expansion pot and maintain a certain pressure. This helps improve cooling efficiency and prevents the creation of a gas hammer inside the cooling system.
In addition, the expansion kettle, also known as the kettle, is a structural component of the car cooling system. When the engine is running, the antifreeze will circulate continuously in the cooling water channel and flow through the expansion kettle in the middle . This design allows the system to discharge excess gas and antifreeze through the bypass water channel when the pressure is too high, thereby preventing the cooling system pressure from being too high and causing the undesirable consequence of pipe explosion.
The way to determine whether the expansion kettle cover is damaged is to observe whether the coolant is ejected from the tank cover. If the coolant flows into the engine, the coolant pressure is reduced, the engine is overheated, and the boiler is boiling, which may mean that the expansion kettle cover has been damaged.
The expansion kettle is an important part of the car cooling system, also known as the kettle. It needs to be filled with water once a year, and the coolant is constantly circulated while the engine is running.
When the coolant pressure is too high or the coolant is excessive, the excess gas and coolant will flow out of the by-pass water channel of the expansion pot to avoid the adverse consequences of excessive cooling system pressure leading to tube explosion. The expansion kettle has a scale on the side, which should be kept between the maximum and minimum scale.
If the expansion kettle cover is damaged, the coolant will spray from the tank cover, causing the coolant to flow into the engine, which will cause the coolant pressure to decrease, the engine to overheat, and the boiler to boil.
Therefore, we need to check and replace the expansion kettle cover in time to ensure the normal operation of the cooling system.
Please call us if you need such products.
Zhuo Meng Shanghai Auto Co., Ltd. is committed to selling MG&MAUXS auto parts welcome to buy.
