Automotive Brake System The Basics
What stops it? • Friction • Kinetic friction • Creates heat • Heat is brakes worst enemy • Weight transfers to front • 70% braking performed by front brakes
Applying the friction • Disc brakes will use pads to ‘squeeze’ the rotor • Drum brakes use shoes to press outwards against drum
Lining material • Non-metallic • Made from synthetic fibers (used to be asbestos) • Semi-metallic • Made from iron and synthetic fibers • More fade resistant - harder pad • More prone to squealing • Full-metallic • Made from sintered metals • Very hard pad
The pressure that is applied at piston A is the same as what is applied to piston B
The hydraulic pressure is the same, but the applied force can be changed by changing the piston size.
The amount force is calculated by multiplying the pressure times the area P X A = Force