Airbag axle just to lose weight? You think it's too simple

According to the requirements of GB7258, starting from January 1, 2020, three-axis rail-plate, silo-type, and flat-plate semi-trailers should use air bag suspension. In the eyes of many people, the airbag axle is mainly to reduce the weight of the vehicle and reduce the body weight. But in fact, it does much more than that.

● Adjust the height of the vehicle

Since the airbag axle mainly trailer axle uses the air pressure to support the frame, adjusting the internal air pressure can adjust the height of the airbag, so as to adjust the height of the vehicle.

For example, for car transport vehicles, the state has strict requirements for the height of the vehicle, but if the upper and lower layers are installed with a higher passenger car, the vehicle is easy to be too high, so it is necessary to use the airbag axle to adjust the height of the vehicle to prevent super high.

In addition, there is a more advanced operation - automatic adjustment of the vehicle height. Some time ago, an article "Trailers should also be intelligent (2) It is not afraid of the height limit bar" mentioned that WABco's intelligent trailer system has an "Optilevel" function, which can automatically adjust the body height:

1) When the vehicle is near the cargo platform, it is automatically adjusted to the height of the cargo box and the cargo platform, which is convenient for loading

2) In the loading process, the forklift automatically adjusts the height after loading and unloading the cargo box, so that the cargo box is always level with the height of the cargo platform, so that the forklift truck can drive more smoothly

3) After leaving the platform, automatically adjust to the height required by the regulations to avoid the height limit bar.

● Adjust the load distribution

For a car with an airbag suspension, there must be some functional relationship between the air pressure inside the airbag and the weight of the vehicle. Therefore, as long as the driving computer obtains the air pressure signal, it can obtain the axle load and the total weight of the corresponding position.

On this basis, we can implement many derivative features, such as overload warning. In addition, WABco's intelligent trailer system can also adjust the load between different axles in steps based on this signal - reducing the air bag pressure for overloaded axles and increasing the air pressure for underloaded axles.

In this way, the load borne by each axle will be more uniform, the degree of tire wear everywhere will be more consistent, and the force of the vehicle chassis will be more scientific, which can extend the service trailer axle life of the vehicle.

● Adjust wheelbase

I simply said "improve axle functionality". If this function is used in bicycles or traction vehicles, then a axle can be lifted when the car is empty, on the one hand to reduce resistance, on the other hand to reduce wear.

In addition, the lifting axle can also be used on the trailer - when the vehicle encounters a small corner that is difficult to turn, the last axle can be raised, which is equivalent to reducing the wheelbase of the vehicle, and the passing performance of the vehicle in the corner can be improved.

● Summary:

Airbag axle function is very powerful, in addition to we often say "lightweight", in the vehicle height, axle load adjustment, wheelbase adjustment and many other aspects can also play a great role. In the future, with the high-efficiency development of the logistics industry, the components that can integrate multiple functions of the airbag axle will be well promoted.