However, disc brakes are superior to drum brakes in many respects

Update:28-12-2018
Summary:

However, disc brakes are superior to drum brakes in man […]

However, disc brakes are superior to drum brakes in many respects, otherwise they will not be used on a large number of new models, but these benefits are not reflected in the braking force, but in other aspects.

Since the drum brake is in a confined space, its heat dissipation is not very good, and a large amount of heat is accumulated during the braking process. Brake shoes and drums are more susceptible to extremely complex deformation under the influence of high temperature, which is prone to brake degeneration and chattering, resulting in reduced braking efficiency.

Drainage is another characteristic of disc brakes over drum brakes. When water enters the brake system, the effect on braking performance is obvious. If the water cannot be discharged in time, the braking performance will be greatly reduced.

As can be seen from the structure, the closed design of the drum brake is obviously not as good for drainage as the disc brake.

Drum brakes are first used in brake systems, and the manufacturing technology is relatively more mature, so the cost is due to the disc brakes. The brake disc quality of the disc brake needs to be improved. The cost of the brake caliper, the number of pistons, the brake shoe and the like cannot be equal to the drum brake.