What are the advantages and disadvantages of air suspension?

Advantages: One advantage of air suspension is that it can automatically adjust the hardness of the spring. When driving at high speed, the suspension will automatically harden, which will bring better support to the vehicle and make the vehicle run more smoothly. When driving at low speed for a long time, the suspension will automatically soften, which will bring better comfort to drivers and passengers. In other words, it is flexible.

Disadvantages: Generally speaking, the cost of more advanced things is high, and the natural price is also high. Although the cost of air suspension is decreasing with the continuous progress of technology, compared with the common spring suspension, its cost is still relatively high, and it is difficult to popularize it to low-end cars. Moreover, the more precise things are, the more likely they are to be damaged, and air suspension is no exception.

Extended data:

Generally speaking, vehicles equipped with air-type adjustable suspension have ground distance sensors near the front and rear wheels. The driving computer will judge the height change of the car body according to the output signal of the ground distance sensor, and then control the air compressor and exhaust valve to make the spring automatically compress or stretch, thus reducing or increasing the ground clearance of the chassis, and increasing the stability of the high-speed car body or the passability of complex road conditions. In daily adjustment, the air suspension will have several states.

1, keep the state. When the vehicle is lifted off the ground by the elevator, the air suspension system will close the relevant solenoid valves, and the computer will remember the height of the vehicle body to keep the original height of the vehicle after landing.

2. Normal state, i.e. engine running state. During driving, if the body height changes beyond a certain range, the air suspension system will adjust the body height regularly.

3. Wake up. When the air suspension system is awakened by the remote key, door switch or rear compartment lid switch, the system will check the height of the vehicle body through the vehicle body level sensor. If the height of the car body is lower than the normal height to a certain extent, the air storage tank will provide pressure to raise the car body to the normal height. At the same time, the air suspension can adjust the stiffness of the shock absorber, including soft state, normal state and hard state (also marked as comfort mode, normal state and motion mode, etc.). ), the driver can control it through the control buttons in the car.

Of course, compared with the traditional suspension, because the structure of the air-type adjustable suspension is more complicated, its failure probability and frequency will be higher than that of the spiral spring suspension system. Using air as power source to adjust the height of chassis, the tightness of related components is also a problem. In addition, if the chassis height is adjusted frequently, it may cause local overheating of the air pump system and greatly shorten the service life of the air pump. Of course, with the continuous improvement of technical level, many problems have been well solved, and the application of vehicles has become more and more extensive.

References:

Baidu encyclopedia air suspension system