The priority of air storage in the braking system is ensured. The clutch booster pump works normally only when the air pressure shown on the air pressure gauge exceeds 6bar, and finally the parking brake is released
The noise is obvious at low speed, and disappears at medium and high speed. The accelerator shakes at low speed with a 'click, whine' sound. When the water temperature of the diesel engine is lower than 40 ℃, the noise decreases or disappears with the increase of the temperature,
With the attitude of being responsible for drivers, owners, pedestrians and other vehicles, we decided to find out the root cause of the problem. After more than two weeks of test and analysis, we finally solved the braking problem of "it's really cold in winter".
Today's vehicles are equipped with spring parking system, which is commonly known as "air brake". After the air pressure drops to 4.5-3bar or the parking handle in the cab is operated, the spring chamber of the brake wheel cylinder acts to lock the brake drum to achieve the purpose of locking braking.
