What part of the brake system is used to increase braking force?

The brake booster is a critical component of the braking system designed to enhance braking force. It employs vacuum pressure, typically generated from the engine, to amplify the force applied by the driver on the brake pedal. When the driver depresses the pedal, the booster increases the braking pressure sent to the brake calipers, ultimately providing a more powerful and efficient braking response without requiring significantly greater effort from the driver.

In contrast, the brake caliper is responsible for applying force to the brake pads against the brake rotor to create friction, but it does not amplify the force applied by the pedal. The brake pads serve as the friction material that comes in contact with the rotor to slow down or stop the vehicle, while the brake rotor is the disc that the pads clamp down on. Although these components are all essential to the braking system's function, they do not have the capability to increase the braking force like the brake booster does.