How Your Vehicle Works
Braking Systems
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Your vehicle’s brake system has one job – stop your vehicle. But it takes several key components to deliver that singular end result.
To bring a vehicle to a halt, three things are necessary: leverage, hydraulic force and friction.
Leverage is supplied by the driver’s leg pressure and the brake pedal. The pedal is connected by levers and rods to the back of the power booster. The power booster uses either engine vacuum or a hydraulic pump to multiply and transfer the force of that leverage to the master cylinder. The master cylinder is the heart of your vehicle’s brake hydraulic system. It uses applied leverage to force a reservoir full of brake fluid through valves, steel lines and rubber hoses into hydraulic calipers and wheel cylinders. That hydraulic pressure is then used to help create friction.
For example, disc brakes
use a hydraulic caliper fitted with brake pads to grab a spinning disc
(or rotor). Drum brakes, on the other hand, have a hydraulic wheel
cylinder that pushes a brake shoe against the inside of a spinning
drum. Either design involves highly engineered parts and precise
movement. The more force a driver applies to the brake pedal, the
greater the stopping force that is applied at the wheels.
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