Trail air suspension systems are advanced products popular in the developed countries' automobile industry. In developed countries, 100% of mid-sized or larger passenger cars use trail air suspension systems, and over 40% of trucks, trailers, and tractors use trail air suspension systems. The biggest advantage of trail air suspension systems is that they not only enhance passengers' riding comfort but also play an important role in protecting the road.

Working principle of trailer air suspension parts

The sensor sends the collected signal to the control unit, which calculates and sends out instructions to adjust the air spring hardness and shock absorber damping to achieve the ideal elastic state. This seemingly complicated process has a reaction time of only tens of microseconds in the entire system. Therefore, the trail air suspension can make timely and appropriate responses to every tiny movement of the wheels. Of course, compared with traditional suspension, due to the more complex structure of the air-adjustable suspension, the probability and frequency of failures are higher than those of the coil spring suspension system. Using air as the power source to adjust the chassis height, the sealing of related components is also a problem. In addition, frequent adjustments to the chassis height can cause local overheating of the air pump system, greatly shortening its service life. Of course, with the continuous improvement of technical level, many problems have been well solved, and the application of models is becoming more and more extensive.

Composition of the trailer air suspension parts system

The trail air suspension system consists of the air compressor, accumulator, control unit, front and rear axle body height sensors, three different direction body acceleration sensors, and four air spring extension acceleration sensors, and so on.

Technical solutions of the trailer air suspension parts system

The basic technical solutions of tandem axle air suspension, utility trailer air suspension, and semi trailer air suspension mainly include air springs filled with compressed air and shock absorbers with variable damping. Compared with traditional steel automobile suspension systems, trail air suspension has many advantages. The most important one is that the spring's elasticity coefficient, which is the spring hardness, can be automatically adjusted according to needs. For example, when driving at high speed, the suspension can become harder to increase vehicle stability, while when driving at low speed for a long time, the control unit considers that the vehicle is passing through a bumpy road, and then the suspension becomes softer to increase shock absorption comfort.

In addition, the acceleration of the wheel caused by ground impact is also one of the parameters considered when the air spring automatically adjusts. For example, when turning at high speeds, the air spring and shock absorber of the outer wheel will automatically become harder to reduce the body roll, and during emergency braking, the electronic module will also strengthen the spring and shock absorber hardness of the front wheel to reduce the inertia forward tilt of the vehicle. Therefore, models with air springs have higher handling limits and comfort than other cars.

Trailer air suspension parts also incorporate traditional chassis lifting technology. When driving at high speed, the body height automatically decreases, thereby improving grip performance, ensuring good high-speed stability, and reducing air resistance and fuel consumption. When passing bumpy roads at low speed, the chassis automatically rises to increase passability. In addition, the trail air suspension system can also automatically maintain the body's level height, and regardless of the load, the body height remains constant, so the spring travel of the suspension system is kept constant under any load situation, making the shock-absorbing characteristics basically unaffected. Therefore, even under full load, the body is easy to control. This is indeed a leap in platform technology.