The working principle of the expansion pot, how does the water in the engine expansion pot come out?
The working principle of the expansion pot mainly involves the separation of water and gas, the balance of cooling system pressure, the supplement of coolant to prevent cavitation, and the relief of pressure to prevent the system pressure from being too high.
Water and gas separation, balance cooling system pressure: When the cooling system is working, part of the pipeline will be in a high temperature state, easy to produce steam. This causes the system pressure to change with the water temperature. The expansion pot can store water vapor from the radiator and the engine channel and return it after cooling, thus balancing the system pressure.
Add coolant to prevent cavitation: Cavitation is the phenomenon of small holes on the surface of mechanical components due to long-term external impact. In the engine cooling system, the impact of steam bubble rupture on the machine surface is the main cause of cavitation. The water-air separation of the expansion pot can reduce the cavitation. In addition, when the pressure on the suction side of the pump is low, it is easier to produce steam bubbles, and the hydration effect of the expansion pot will replenish the coolant on this side in time to reduce the steam bubbles, thereby preventing cavitation.
Pressure relief to prevent excessive system pressure: the lid of the expansion pot has a pressure relief effect. When the system pressure exceeds the specified value, such as the phenomenon of boiling, the pressure relief valve of the lid will be opened, and the system pressure will be removed in time to avoid serious consequences.
In summary, the expansion pot effectively maintains the normal working state of the cooling system through its unique design and function, and protects the engine from damage caused by abnormal pressure of the cooling system.
1. Stand the vehicle until the water temperature drops to normal temperature. Open the driver's door. Pull the car hood open switch to unlock the hood. The unlocked hood can be opened and firmly supported by lifting it upward. Slowly unscrew the lid of the car's small water jug, which is the lid of the liquid storage tank, to relieve the internal pressure.
2. Remove the spark plug. Start the engine. Spin it a little bit longer. Spin it a little bit longer. Let the water in the cylinder drain away from the spark plug. Drain all the oil. Use high-pressure gas high-pressure water gun air gun. Stick a high pressure air gun through the spark plug hole and blow it out. Drain all the oil. Replace the filter element.
3, how to exhaust the water tank air inside the car engine? The way of exhaust air: the car is set on fire to preheat, and the coolant will go down a little after the electronic fan turns, and the coolant will be filled up and the water tank cover will be covered.
4, in order to maintain the car water tank, we need to take the following steps: First stop and turn off the engine, and so on, after the coolant temperature is reduced, open the expansion pot, and add the water tank cleaning agent. Start the engine, wait for the cooling fan to work, and let the engine idle for 5 to 10 minutes. When parked, remove the front bumper of the vehicle.
The reasons for the rising water level of the expansion pot may include the following:
Aging cracking of water pipe joints or water pipes themselves: This can lead to leakage of coolant in the cooling system, which affects the air tightness of the cooling system.
Tank cover damage: The tank cover has the function of automatic pressure relief, if the tank cover is damaged, when the cooling system pressure is too high, the pressure relief valve can not work normally, resulting in the pressure can not be released.
Water pipe leakage: If the water pipe leaks, the air tightness is insufficient, and when the high temperature becomes low, the water of the secondary water tank can not be sucked back to the main water tank, which will also cause the water level to rise.
Pressure rise in the coolant container: When the engine is operating, the pressure in the coolant container will rise, forcing more of the coolant to stay in the cooler and pipe. When the lid is opened, the air pressure drops and the coolant flows back into the container, so it appears that the liquid level rises.
Open the expansion pot when the hot car: open the expansion pot when the hot car, because the water temperature in the water tank will evaporate, so the liquid level will rise.
Engine vent problems: There are vents on the engine or above the upper water pipe, and if the vent is blocked or improperly set, it will also cause the water level to rise.
The above points may cause the water level of the expansion pot to rise, and the specific situation needs to be determined according to actual inspection and testing.
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