Air disc brake

Nowadays, some newly developed pneumatic disc wheel brakes have been used in cars made by European car companies. The Pmeumatic Disc Brake is mounted on the front and rear axles.

After several years of research and testing, the foreign auto parts development mechanism proves that the pneumatic disc brake is superior to the traditional drum brake in all major performances, and will successfully replace the existing products and be widely used in new type of trucks. The advantages of disc brakes in terms of braking performance have been successfully demonstrated in the following aspects.

Braking force and safety In the intermittent braking state, the drum and disc brakes have similar braking capabilities. However, disc brakes perform better in terms of brake response and brake control. In the case of continuous braking, the types of brakes vary widely. Driving down a long-distance slope (see the following mountain), the disc brake does not lose its initial performance under a fixed brake pressure, and the car can travel at a certain speed throughout the journey. In contrast, a car equipped with a drum brake must gradually increase the brake pressure in order to maintain the speed. After continuous braking, the brake force generated by the disc brake is only slightly decreased under the same brake pressure, and the brake force of the drum brake is greatly reduced. Therefore, the safety factors of the two types of actuators are quite different.

Structure and cost disc brake systems include discs, gaskets, cylinders and calipers with fewer parts than drum brake systems, total mass less than ten percent lower than drum brakes, and lower manufacturing costs than drum brakes . The compactness of the two types of brake systems is significantly different. In addition to the brake discs, the disc brakes can be delivered to the axle assembly line as a complete part, which includes all the parts of the disc brake. This has the particular advantage that all pre-conditioned, tested devices with mechanical functions can be supplied to the user, and the responsibility for the product is clearly defined.

Maintenance The complete operating mechanism of the disc brake is sealed in the housing and lubricated to extend its life. Therefore, the disc brakes are almost maintenance-free, and the repair is mainly to replace the worn parts, that is, the gasket and the disc. Moreover, the time required to replace the liner is also 80% less than the time required to replace the drum brake kit. This means not only can save maintenance costs, but also greatly reduce non-operating time.

Electronic Brake Control (EBS) disc brakes are particularly efficient due to their simple and fairly sophisticated operating mechanism. Its braking sensitivity allows the EBS system to achieve some powerful and effective control to reduce braking distance and improve vehicle stability and wear rate. The response characteristics of the disc brakes are shown in the fact that the braking difference of each wheel is small, and the wear between the left and right wheels of each axle is evenly distributed. This factor greatly simplifies the parameter design of the EBS system. Drum brakes do not have this feature due to fluctuations in self-service forces that prevent the consistency of response.