Automotive Brake System

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Automotive Brake System

• The Basics

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What stops it?

• Friction
• Kinetic friction
• Creates heat
• Heat is brakes worst enemy
• Weight transfers to front
• 70 braking performed by front brakes

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Applying the friction

• Disc brakes will use pads to squeeze the rotor
• Drum brakes use shoes to press outwards against
  drum

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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

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Hydraulics - its how the pressure is multiplied
and transferred
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Hydraulic pressure is distributed equally in all
directions
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Same line pressure to all wheels
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The pressure that is applied at piston A is the
same as what is applied to piston B
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The hydraulic pressure is the same, but the
applied force can be changed by changing the
piston size.
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The area of the piston is determined by using the
formula

• 3.14 X R2

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The amount force is calculated by multiplying the
pressure times the area

• P X A Force

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You cant have something for nothing
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The caliper piston needs more applied force for
multiple reasons

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