Working Principle of Disc Brakes?
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During braking, hydraulic fluid is forced into the inner and outer wheel cylinders, causing the pistons to press the brake pads against the brake disc under hydraulic pressure, generating friction torque to achieve braking. This is the working principle of disc brakes. Disc brakes mainly come in two types: full disc and spot disc. In full disc brakes, both the stationary and rotating elements of the friction pair are disc-shaped, referred to as the stationary disc and rotating disc respectively. The entire working surface of the brake disc can simultaneously contact the friction pads. Spot disc brakes have their brake pads and actuation devices mounted in a caliper-shaped bracket that spans both sides of the brake disc, known as the brake caliper. Caliper disc brakes have strong heat dissipation capabilities and good thermal stability. Disc brakes are now widely used in passenger cars. Most cars use them on all wheels, while a few only use them as front wheel brakes, paired with drum brakes on the rear wheels.