Air suspension was produced in the middle of the 19th century, after a number of stages such as pneumatic spring, air bag composite suspension, semi-active air suspension, central inflatable suspension, until the 1950s was applied to trucks, buses, cars and railway cars.

The most common failure of air suspension is that the air bag is wrinkled or the air bag is less or no air, which leads to different reasons for these two situations, and the treatment method is not the same.

1. Air bag folds.

The reason:

(1) When the vehicle is transferred and hoisted, the air bag is stretched out more and is not restored normally, resulting in the air bag wrinkling;

(2) When the vehicle enters and leaves the maintenance workshop or a large slope platform, it may also cause individual airbags to be overstretched, resulting in airbag wrinkles.

Treatment method:

Open the rubber connector under the horizontal height valve, lift the rod up, wait for all the air bags to be full, and then install the rod back, the air bag can return to normal.

In addition, if such a failure often occurs during driving, it is necessary to consider adding a limiting device between the axle and the frame.

2. Less or no air in the air bag.

The reason:

(1) Air suspension special air storage cylinder no air or low pressure, when the trailer air pressure is less than 6 kg, the pressure protection valve will suspend the air supply to the air suspension air storage cylinder to ensure that the brake system maintains sufficient pressure;

(2) The air pipeline is blocked or discounted, but the gas is not available;

(3) The horizontal height valve connection rod falls off;

(4) The horizontal height valve is damaged.

Treatment method:

The air source of the air suspension is connected by the brake system, and stored in a special air reservoir through a pressure protection valve. Work through the filter to the horizontal height valve of the air suspension, and then to the left and right air bags. When the air bag is less or no air, as long as you find the right cause of the failure, you know where to start, and it is not difficult to solve.