Can trailer ABS work with drum brakes?

The full name of ABS is the anti-lock braking system. It is a device that prevents the wheels from locking and keeps the wheels and the road at friction when the vehicle is braking. After installation, it can improve the braking performance of the vehicle and enhance driving safety. Reduce the cost of vehicle maintenance to a certain extent.

In general, the basic components of a set of ABS mainly include sensors, combined controllers, wheel speed sensors, main suspension connection harnesses and various sensor connection harnesses.

As we usually say, "four-channel" and "six-channel" are common names for ABS sensors. "Four-channel" refers to four sensors that control the wheels on the left and right sides respectively; "six-channel" refers to six sensors. , each trailer axle is equipped with an independent control unit. Therefore, the monitoring and control of the six-channel ABS should be more accurate, and of course the purchase cost will be higher. If the car owner usually runs on high-speed, national highways, and provincial highways, the four-channel ABS can basically meet the needs of use, but if driving The road conditions are more complicated, so for the sake of safety, try to choose six channels.

How to install ABS? Next, let's simply talk about it.

1. Remove tires and wheels

2. Install the ring gear

There are two main ways to install the ring gear:

One is to place the wheel core in a horizontal position, and press it down with pressure after placing the ring gear. Generally, professional equipment is needed, otherwise the horizontal stability cannot be controlled well;

The other is the heating method, which heats the ring gear to 180°C-200°C, and completes the assembly by the principle of thermal expansion and contraction.

When heating the ring gear, ensure that the heating is uniform, and then heat it onto the ring gear installation step of the hub. Be careful not to hit the surface of the ring gear directly with a hammer to avoid deformation of the ring gear. You can use wood blocks or other items to cushion it.

3. Weld sensor bracket

Identify the welding position of the sensor bracket, weld it to the vertical center of the axle, about 8mm higher than the axle, and ensure that the sensor probe can maintain a gap of <0.7mm with the ring gear after being inserted into the bracket.

4. Install hubs, brake drums and wheels

Be careful not to push the hub directly to the end, to avoid damage caused by the ring gear hitting the sensor, reserve a certain amount, and then slowly tighten it to the end with the nut.

5. Fixed combination controller

Fix the combination controller to the frame, pay attention to the following points:

The exhaust port must be vertically downward;

The inner diameter of the pipeline from the controller 1 port to the gas storage tank is at least 12mm;

The inner diameter of the pipeline from the controller 2 port to the brake chamber is at least 9mm;

Fix it to the middle of the three bridges as much as possible, so that the distance between the air pipes connecting each chamber and the controller is shorter and equal.

6. Arrange the ABS wiring harness

The wire harness can be covered with a gas tube to improve its wear resistance and prolong its service life. Reasonable layout and firm binding to prevent line wear caused by vehicle bumps.

After completing the above steps, the trailer ABS system is basically installed. If possible, it is best to find professional equipment for computer testing to check whether each step is installed correctly, so as not to affect subsequent use.

It is worth noting that some car owners are used to the "brake king" and are used to lightly step on the brake pedal when braking; the ABS system is an automatic point brake program. After starting, the brake pedal will rebound upwards, allowing the wheels to While rolling and slipping, it maintains maximum adhesion to the road surface and is manoeuvrable at the same time. If the owner steps on and loosens it, it often cannot exert its effect, and must step on it to the bottom.

In addition, the ABS system has no rigid requirements for the type of trailer axle. Both the drum trailer axle and the disc trailer axle can be used together. However, because the braking response speed of the drum brake axle is not as fast as that of the disc brake, the frequency of click brakes is not as good as that of the disc brake. , To a certain extent, it will affect the ability of the ABS system to change the line during emergency braking. From this point of view, if you want the ABS to maximize its use efficiency, I am afraid it must be matched with the disc trailer axle.