Brake System Components Categories

Summary

The video classifies brake-system components into six functional subsystems and explains how they work together to slow a vehicle.

Six subsystem categories

1. Apply system — The driver initiates braking by pressing the brake pedal or applying the parking brake. This system includes the pedals, levers, and linkages used to apply the brakes.
2. Boost system — On most vehicles, a booster increases the force applied at the brake pedal.
3. Hydraulic system — Transfers brake force as hydraulic pressure toward the wheel brakes.
4. Wheel brakes — In disc or drum brakes, hydraulic pressure moves a piston so friction material presses against a rotor or drum. The resulting friction slows the wheels.
5. Brake balance control system — Mechanical, electrical, and hydraulic components help apply the brakes quickly and distribute pressure appropriately. Examples include metering valves, proportioning valves, and anti-lock braking system components.
6. Brake warning lights — The red brake warning lamp illuminates when a hydraulic-system failure occurs.

Basic braking sequence

• The driver presses the brake pedal or applies the parking brake.
• The apply system provides the necessary mechanical input.
• Where fitted, the boost system increases pedal force.
• The hydraulic system transfers that force toward the wheel brakes.
• Pistons press friction material against a disc rotor or drum, creating friction that slows the wheels.
• Brake-control components help ensure prompt, balanced operation.

Speakers and sources

• Speaker: One explanatory narrator; no individual speaker is identified.
• Other audio: Background music.