In recent years, the emission standards of heavy-duty diesel vehicles have been continuously upgraded, and the technical requirements have been continuously improved. The replacement of old models is relatively fast, and the car owners have entered a new climax. However, most Trailer owners only change the tractor when changing the vehicle, and semi trailers generally will not be changed at the same time. This leads to a problem: the main hook does not match.

In short, the mismatch of main Trailer refers to the unequal technical configuration of tractor and semi-trailer, and the most obvious one is the mismatch of braking system. For example, the vehicle brake is not easy to use. No matter how to replace the brake pad, brake drum or pump valve, the effect is not good; Or the vehicle braking system has early wear, but the corresponding reason cannot be found; Or the tractor stops and the semi-trailer is still arching forward during driving, resulting in pushing the head, and even the vehicle rollover directly when turning, and so on.

It can be seen that the mismatch of main gears has a great impact on the use of vehicles, which not only affects the attendance of vehicles, consumes time and money, but also is not conducive to driving safety.

It is worth noting that, in addition to the phenomenon of ordinary trailers, some articulated vehicles, such as those of express companies, need to change trailers frequently, but the technical status of trailers is not exactly the same, and the mismatch of main trailers is more common.

So, how many situations exist when the main braking system does not match? Darong axle is listed as follows:

1. Poor matching of ABS system.

At present, the newly delivered tractors in the market are generally forced to install ABS system, and most of them are brand ABS. However, few owners can install brand ABS on their original semi-trailer, or non brand ABS, or no ABS, or old abs that has failed.

In this case, when the vehicle is braking, the braking distance will become larger due to the lack of good braking effect; Secondly, it is easy to push the head, especially under emergency braking; In addition, the ABS system of the main vehicle can prevent the wheel from locking and carry out the braking action of "rolling and sliding", which can directly lock the wheels of the semi-trailer. The tire loses grip and is prone to sideslip, which is very easy to cause the vehicle out of control accident.

In addition to causing danger, the mismatch of main Trailer ABS is also easy to make the driving wheels of the main vehicle in the braking wear state for a long time, resulting in early excessive wear.

2. Refit the "brake king" without permission.

In previous articles, we analyzed the working principle of "brake king". After refitting the "brake king", although the subjective feeling of the owner seems to be that the braking force has increased, it is easy to affect the coordination of the main suspension braking system. Especially for the trailer with automatic adjusting arm, the use of "brake king" will seriously damage the function of automatic adjusting arm and make it invalid, resulting in early wear of trailer braking system or braking failure.

3. EBS system mismatch.

With the continuous improvement of tractor configuration, more and more vehicles are equipped with EBS system. Many car owners disagree and think that as long as the trailer is equipped with ABS system, it can be used with the EBS of the main car. In fact, EBS can only play a good braking effect if it is matched with ECS.

EBS is controlled by electric signal, and the braking response will be faster. If the main vehicle is EBs and the trailer is ordinary ABS, it is very likely that the main vehicle will respond first and the trailer will respond later when braking, so it may push the head.

In addition, if the main vehicle is equipped with EBS, the trailer is not installed. When the turning speed of the vehicle is too fast, the EBS system will automatically brake the wheels on the inner side of the vehicle in order to ensure the safety of the vehicle. However, because the trailer is not equipped with EBS and cannot synchronize the action of the main vehicle, it will push the main vehicle forward, resulting in rollover.

Therefore, if the main vehicle is equipped with EBS system, the trailer should also be equipped with EBS, which can not only improve the braking comfort, but also improve the cornering stability.

According to the requirements of the new national standard, the disc brake plus air suspension, if equipped with EBS system, can not only improve the response speed of the braking system, ensure the stability and reliability of the braking force output, make the vehicle stop smoothly in the fastest time, but also reduce the wear degree of the braking system and prolong the service life of relevant accessories. To make EBS play its best function, it must be matched with high-specification products with qualified quality. Darong disc axle is a special disc brake axle for trailers. It is made of high-strength alloy materials, with strong bending and torsion resistance, sensitive braking and fast response speed. It is safer to brake in cooperation with EBS system.