Why do big trucks need to pump up before braking?

Before driving a large truck, the air pressure should be increased to more than 6 bar.

The working mode of the air brake is that the brake pedal is connected with the pull rod to control the closing of the compressed air storage tank. When the brake is depressed, the air storage valve opens, and the air flow is delivered to the brake cam shafts of the four wheels through the air pipes. When important official rotates, the flange will push the brake pad to act on the brake hub.

Achieve the purpose of braking. This way of working is equivalent to the brake pedal directly controlling the opening and closing of gas transmission, so it is difficult to master gas transmission, so gas braking is more normal than oil braking.

Air pressure precautions:

1, every time you use the car air pump, you must use it after starting the car. If it is turned on at the beginning, it will supply power to the battery and hurt the car battery.

2. The car air pump will inflate slowly because of its low power. Many car owners will use the car air pump for a long time, which is easy to cause the air pump to overheat and damage. The correct way is to stop after a few minutes of use and let the pump cool down properly.

3. Many vehicles are equipped with tire pressure alarm system, but there is no tire pressure value of each tire. Don't blindly use the car air pump at this time. You can measure the air pressure of each tire with a pump first, and then choose to inflate it.

4. Vehicle-mounted air pump is not suitable for inflating large off-road vehicles, and the tire pressure of large off-road vehicles is high, so it is difficult to inflate the tires of off-road vehicles with vehicle-mounted air pump.

5, many car owners will blindly use the air pump, in fact, it is only a temporary emergency. If the tire pressure is often unstable, it must be checked in time to prevent problems with the vehicle.

6. The wiring of the car air pump is very thin. If it is not used or stored improperly, it is likely to lead to wire breakage. Therefore, it is necessary to adjust the wiring when using it and keep it properly after using it.