Working principle of height valve

The working principle of the height valve is mainly to dynamically perceive the height changes of the vehicle, timely complete the intake or exhaust actions, adjust the height of the air spring (airbag), improve the comfort of drivers and passengers, and prevent damage to the road surface caused by wheel impact. The following is a detailed introduction to the working principle of the height valve: 
When the load on the vehicle increases, the vehicle decreases due to the compression of the air spring airbag, which opens the intake valve of the height control valve connected to the main air cylinder. Air flows into the air spring due to the pressure difference until the vehicle rises to its original position, the lever returns to the horizontal position, and the intake valve closes.
When the vehicle load decreases, the vehicle rises, the lever of the height control valve rotates, the exhaust valve opens, and air is discharged into the atmosphere from the air spring and additional chamber until the vehicle lowers to its original position, and the exhaust valve closes.
In addition, when the vehicle is at the set height, the height valve is in the neutral position, and both the intake and exhaust valves are closed. The air spring neither inflates nor exhausts. When the vehicle experiences slight changes in load due to vibration or other reasons, the height valve remains in a pressure maintaining state. When the load change is relatively small, the height valve can slowly charge and exhaust, making the height valve transition to the neutral position steadily, while avoiding frequent charging and exhaust, and making reasonable use of the air source.