With the continuous evolution of automobile suspension, air suspension can already adjust the height, damping, and stiffness of the car body, effectively improving driving comfort and control, and increasing cruising range.
The air suspension system includes air supply unit, electronic control unit, multi-system sensors, air springs, shock absorbers, etc. The air supply unit mainly includes a series of components such as air compressors, air storage tanks, and valve groups.
The air suspension valve block is the heart of any air suspension system. Currently, in common automobile electronically controlled air suspension systems on the market, a large number of solenoid valves are often used to achieve various necessary functions, such as rising or falling. However, these solenoid valves are independent of each other, resulting in assembly time The assembly of circuits and gas circuits is complex and difficult to assemble, and it is difficult to coordinate and control during operation, and the system failure rate is high.
Thus an air suspension valve group was born. Usually composed of multiple valves, each valve controls an individual air spring or a group of air springs, which greatly simplifies the circuit and air path, not only making installation more convenient, but also facilitating coordinated control, reducing the failure rate of the suspension system.
The main function of the air suspension valve group is to inflate, exhaust or hold the air spring according to the instructions issued by the ECU electronic control unit, and is responsible for distributing compressed air. It can distribute the gas in the air tank to different air on the four wheels. The branch road enters the air column controlled by the air spring of each of the four wheels to complete the adjustment of the height of the vehicle.

In the air suspension system, solenoid valve-related products mainly include gas distribution valves, pressure maintaining valves, multi-cavity solenoid valves, CDC solenoid valves, etc. The total value of a bicycle of these products reaches 800 to 1,100 yuan. It is expected that by 2025, the domestic air The overall market size of suspension system solenoid valves will exceed 3 billion yuan, and shipments will exceed 3 million units.