What is the ABS system?
The scientific name of ABS is anti-lock braking system. As the name suggests, ABS is a device to prevent wheel locking when the vehicle is braking. It can make the wheel and the road constantly maintain rolling friction, so as to improve the friction force (only for non-snow and ice road).
The origin of the ABS system?
The ABS system is designed to improve the braking efficiency of vehicles.
Braking efficiency refers to the ability of the vehicle to slow down and stop during driving, including braking distance, braking time and braking deceleration.
If the same vehicle wants to obtain greater braking effect on the same road surface, it can only alter the longitudinal adhesion coefficient between the wheel and the road surface during braking. The greater the adhesion coefficient, the better the braking efficiency, and the adhesion coefficient depends on the slip rate of the wheel.
If you want the vehicle to be able to travel in the specified direction when braking, without deviation and sideslip, and maintain the steering ability, you need to improve the transverse adhesion coefficient between the wheel and the road surface, which also depends on the slip rate of the wheel.
Semi Trailer supplier says After a lot of experiments and analysis, when the wheel slip rate is controlled at about 20%, the maximum longitudinal adhesion coefficient and large transverse adhesion coefficient can be obtained, that is, the best braking performance can be achieved. As a result, vehicle pioneers were able to control wheels with a slip rate approaching 20 percent -- ABS systems.
Advantages of ABS system:
1. Enhance vehicle control. Vehicles equipped with ABS system can still maintain a large degree of control in the process of emergency braking, and the front side can timely avoid obstacles or dangerous situations. When the vehicle without ABS is in emergency braking, it is easy to lose control of the vehicle, resulting in sideslip, tail swing and other accidents. At the same time, it is extremely difficult to turn after the vehicle brake lock, because the wheel and the ground belong to static friction at this time.
2. Reduce the slippery phenomenon of vehicles. Especially in rain and snow weather wet, smooth road, when the vehicle emergency braking, if the ABS system is not installed, the wheel will be locked after the vehicle continues to slide forward on the road to maintain inertia. The ABS system reduces the chance of wheel locking and therefore the chance of slipping during braking.
3, reduce tire loss, prevent tire bias wear. After the ABS system is installed, it eliminates the phenomenon of wheel locking during emergency braking and reduces the possibility of forming flat spots on the tire surface. Do not install ABS system. If the wheel is locked, the ground and tire contact area will constantly wear, a long time is easy to form partial wear.
Misunderstanding of ABS system:
1. Misunderstanding: ABS system can shorten the braking distance.
The main function of ABS is to prevent wheel locking, not to shorten the braking distance. ABS can take into account the maximum longitudinal adhesion coefficient and large transverse adhesion coefficient in the running of the vehicle to ensure that the vehicle does not lose control of the situation, but this does not mean that the vehicle equipped with ABS can shorten the braking distance. In wet road conditions, the braking distance of ABS is shorter than that when the wheel is locked, but on the ordinary road, the braking distance is longer.
2, the use of errors: the brake pedal is not difficult to step on the death.
The vehicle installed with ABS system should press down the brake pedal with one foot when braking in emergency, so as to make the ABS system play its effect. When the ABS system starts, it is normal for the brake pedal to rebound. At this time, do not release the brake pedal, continue to step heavily on it, and do not step loose, which will instead make the vehicle lose the braking effect and improve the risk.
Why do many car owners dislike ABS?
Because ABS prevents the wheels from completely locking, some drivers feel they don't slow down sufficiently when they hit the brakes. In addition, ABS will continuously adjust the braking pressure in emergency braking, which gives the owner the feeling of "spring foot", not as good as "brake king", a step on the brake immediately the wheel hugs, but for a long time the brake drum is easy to crack and damage. Some owners don't love ABS for simple reasons, steep cost, and wouldn't choose it if it wasn't mandatory.
Why do car owners think trailer ABS is bad?
1. Technical level
Most domestic trailer production enterprises still stop in the stage of simple welding production, lack of design and experiment ability for more complex electronic auxiliary systems. In addition, the ABS system has strong requirements for installation, so it is easy to make installation errors without special technical training.
2. Market environment
The trailer production industry is extremely competitive, numerous manufacturers strictly control the production cost, axle, ABS and other high-value parts become the object of cost saving, a large number of fake and inferior products flood the market, the vast majority of trailers are assembled with unknown ABS system, their biggest role is not to ensure safety, is to be able to successfully on the license, after most will be removed.
Should the semi trailer be equipped with ABS?
If ABS system is installed on the tractor-trailer, it is recommended to install it on the trailer, otherwise it is easy to appear the phenomenon of the main hanging mismatch, especially under emergency braking.
In addition, the ABS system of the main car can prevent the wheel from locking, and carry out the braking action of "rolling side sliding". The wheel of the semi-trailer can be directly locked, and the tire is prone to sideslip, which easily leads to the accident of vehicle out of control.
In addition, the mismatch of main hanging ABS also easily causes the driving wheel of the main car to be in the state of brake wear for a long time, resulting in early excessive wear.