What is the principle of disc brakes?
1 Answers
Disc brakes work by forcing hydraulic fluid into the inner and outer wheel cylinders during braking. The pistons, under hydraulic pressure, press the two brake pads against the brake disc, generating frictional torque to achieve braking. The advantages are as follows: Good thermal stability: Due to the relatively small size of the brake friction pads, their working surface area is only 12% to 6% of the brake disc area, resulting in better heat dissipation. Good water stability: Because the unit pressure of the brake pads on the disc is high, water is easily squeezed out. Additionally, water is easily thrown off under centrifugal force, and the wiping action of the pads on the disc helps. Therefore, after exposure to water, normal braking performance can be restored with just one or two brake applications. In contrast, drum brakes require more than ten brake applications to restore normal braking performance.