The principle of semi trailer brake system, how to adjust the semi trailer brake

In the double-pipeline braking system, one of the main braking pipes of the trailer leads out of the tractor gas reservoir, and the air reservoir of the trailer is inflated, which is called the air supply pipeline, and the pipe joints are often painted red. The other pipe leads out of the brake control valve of the tractor to operate the hanging tooth brake valve (also known as the relay valve or distribution valve).

Braking is achieved by supplying the trailer brake chamber through the trailer gas tank. This line is called a manipulation line, and the fittings are generally painted blue. During normal driving, the compressed air produced by air compressor is filled into two air reservoirs 4i and 4ii of tractor vehicle by regulating valve 2, double circuit protection valve 3.

Extended Information: Basic Requirements for Semi-Trailer Braking Systems:

1. The correlation between the braking system of the trailer and the tractor, and the braking effect works together with each other.

2. The sequence coordination between the trailer and the tractor braking system, the braking sequence is the front wheel of the tractor

Semi-trailer wheels and tractor rear wheels to ensure the stability of the vehicle.

3. When the trailer is disconnected from the tractor, the brake pipeline is cut off; Or in case of emergency damage to the trailer pipeline, the trailer braking system will automatically brake to ensure safety. (Note that this is not a simple sense of shut-off parking brake work).

4. When the car train is fully loaded, the traction trailer state ensures safe and reliable parking on 16% of the ramps; The trailer must be equipped with a parking brake system to ensure the braking state when parked when disengaged from the tractor alone.

Encyclopedia - semi-trailer.

The owner of the semi-trailer brakes in a clockwise direction.

In the braking system of the semi-trailer, there is a lever behind the brake drum, and the one at the end of the rod wall pulls the brake. When the owner of the semi-trailer brakes, adjust it to a clockwise brake system to ensure that the semi-trailer can brake smoothly.

The braking system of the semi-trailer is composed of the trachea joint, inflation line, relay valve, ABS valve, ABS sensor and wheel brake of the tractor. The inflatable pipeline is connected with the tractor air reservoir through a quick pipe joint; The control pipeline is connected with the brake valve of the tractor through the quick coupling, and when the semi-trailer is braking, each brake chamber acts at the same time.

The semi-trailer brake should pay attention to the immediate stop tilting action, straighten the body bar, and then brake. When the speed is a little slow, lean the body to turn.

Semi-trailer: A trailer with axles behind the vehicle's center of gravity (when the vehicle is evenly loaded) and fitted with a coupling device that transmits horizontal and vertical forces to the tractor. Generally, it is a three-axle semi-trailer, which is divided into 11-meter warehouse semi-trailer, 13-meter warehouse column, low-bed semi-trailer and other types.

It is a kind of heavy-duty transport vehicle that is connected with the semi-trailer head through the towing pin. It is suitable for the transportation of bulk and scattered goods such as coal, ore and construction materials.

Features: Compared with the "monocoque" car, the semi-trailer can improve the comprehensive economic benefits of road transportation. Transportation efficiency can be increased by 30-50%, costs can be reduced by 30-40%, and fuel consumption can be reduced by 20-30%.

More importantly, the use of semi-trailers can also play a certain role in promoting the organization of logistics in China.

Uses: Semi-trailers are the main transport volume of large volume, and not easy to split large goods, such as excavators, etc., fence type is more suitable for pulling fresh goods, such as vegetables, fruits, etc. The van type is more suitable for pulling bulk cargo and moisture-proof more valuable goods.

Now more and more young drivers have joined the team of driving trailers, but some novices are prone to problems in braking skills due to unfamiliar technology, that is, some old drivers of trailers, because of their long driving experience, they do not think about driving, and they are easy to develop some bad habits, resulting in their own safety hazards. It can be seen that braking is a driving skill that every driver must firmly grasp in driving.

First, the most important thing is for novice semi-trailer drivers. Many new semi-trailer drivers are accustomed to lightly pressing on the brakes on their toes. In general, there is nothing wrong with this action; However, in an emergency, it is likely that the car will not be able to stop immediately.

This is because braking with your toes is not as fast as using the soles of your feet, and you can press the entire brake pedal to the end in an instant, giving full play to your braking ability. The correct way to apply the brakes is to get into the habit of applying the brakes with the force from the tip of your toe to the sole of your foot. At this time, if the speed is too fast and the semi-trailer does not have ABS anti-lock braking system, it is likely that after the brake is pressed, the tire will bite and cannot control the direction of travel.

From the way a person usually operates the brakes, you can see the level of driving. Stopping the car as soon as you apply the brakes, or not stopping when it's time to stop, is not what a master driver should be.

Second, novice trailer driving, often pay the most attention to the car's brakes, we should do a good job of speed adjustment before turning. Braking, gear shifting, pump oil. In case of an emergency, if you suddenly notice an obstacle, you should immediately stop the tilting action, straighten the body bar, and then brake.

When the speed is a little slow, lean the body to turn. To put it simply, stop turning, braking, and turning again.

Third, the downhill braking of the semi-trailer lies in the skill. The purpose is to prevent the front of the car from sinking too much, actively increase the weight of the tail wheel, and avoid pressurizing the bar. Use the throttle wisely.

In addition to the foot brake, it is also necessary to use the accelerator pedal to control the speed of the vehicle. In the case of a safe distance, once you need to slow down, you just need to release the accelerator, and properly cooperate with the foot brake, it is easier to control the speed of the vehicle.

The three aspects listed above are the correct operation methods of the trailer brakes, and I hope that the driver will keep these skills in mind when operating, change the bad methods in the past, operate correctly, and travel safely.

Yours see if there is gas supply. There is air supply: the air pressure is supplied to eight, release the handbrake, and use the plum blossom clockwise to tighten the adjustment arm and then release half a circle [three knocks] counterclockwise. No air supply: the brakes can be lifted and cannot be adjusted.

There is a lever behind the brake drum, and the one at the end of the pole wall pulls the brake, and you can see it below. There is a screw that needs to be held down with an open plate to adjust, all of which are tightened, and then each one and a half times loosened.

There is a rubber plug in the lower part of the wheel, buckle it down, use the flat head taper to turn the gear inside, you can adjust the brake, but it is recommended that you do not adjust it, do not move, after all, the brake is not a joke, just know it, or ask the repairman to adjust it.

The principle of the air circuit of the braking system of a semi-trailer car: it creates a huge frictional force that converts the kinetic energy of the vehicle into heat. As we all know, energy is neither generated nor disappeared from space.

It can only be converted from one form to another or from one object to another. During the transformation or transfer, the total energy remains the same.

During the acceleration process, chemical energy is converted into heat energy and kinetic energy. When braking, the braking system converts kinetic energy into heat energy and discharges it into the air.

Nowadays, most small cars use hydraulic braking, because the liquid can not be compressed, almost 100% of the power can be transmitted, the basic principle is that the driver presses the brake pedal, the brake oil is applied in the brake main cylinder, and the liquid is piped to the piston of each wheel brake caliper, and the piston drives the brake. Car brake calipers clamp the brake discs, causing huge friction and slowing down the vehicle.

1. Method: There is a lever behind the brake drum, and the one at the end of the rod wall supports the brake, and you can see it below. There is a screw that needs to be pressed and held with an open plate to adjust, and the whole Li Jian part is tightened, and then each one and a half times are loosened.

2. Principle: The engine runs to drive the air pump to generate air pressure, and the air pressure of the air pump bar is transmitted to the air storage tank and pressurized, and the air storage tank and the brake master cylinder are connected at any time to brake the car master cylinder. The air pressure is conveyed to the brake cylinder through the brake master cylinder, and the brake cylinder is in a sealed state, and after the air pressure enters, it produces a physical action to push the hosiery disturbance bridge lever to achieve brake braking.

Hello, the semi-trailer handbrake is realized by the mechanical principle of socks. The handbrake is usually braked by pulling the handbrake lever so that the mechanical connection between the handbrake lever and the vehicle chassis is realized. When the handbrake lever is pulled up, the mechanical connection on the handbrake lever pulls the mechanical parts of the braking system, causing the brake pads to come into contact with the wheels, thus braking.

At the same time, the braking system of the semi-trailer will also be pulled, so as to realize the braking of the trailer. Therefore, only the trailer brake is achieved by means of a handbrake. It should be noted that the handbrake can only be used as an auxiliary brake in an emergency, and cannot replace the foot brake.

1. Method: There is a lever behind the brake drum, and the pole wall base answer at the end of the dry front bench pulls the brake, and you can see it below. There is a screw that needs to be held down with an open plate to adjust, all of which are tightened, and then each one and a half times loosened.

2. Principle: The engine runs to drive the air pump to generate air pressure, and the air pressure of the air pump bar is transported to the air storage tank and pressurized, and the air storage tank and the brake master cylinder are connected to the brake master cylinder at any time. The air pressure is conveyed to the brake cylinder through the brake master cylinder, and the brake cylinder is in a sealed state, and the air pressure produces a physical action after entering the brake lever to achieve brake braking.