What happens when a brake pedal is pressed?
What happens when a brake pedal is pressed? After you press down on the pedal, the master cylinder transforms that force into hydraulic pressure in the brake lines. This hydraulic pressure in the brake lines engages the piston at the: Brake caliper of disc brakes. Why does my car rev when I press the brake? If your car engine revs when braking, the first thing to look at is the brake booster. It applies a booster set up to work with the master cylinder to provide higher hydraulic pressure to the brakes and lower force used on the brake pedal...