Step on the brake pedal to move the brake master cylinder piston forward, close the bypass hole, and build up oil pressure in front of the piston. Then the oil pressure is sent to the brake cylinder through the pipeline
The key to the working principle of the brake cylinder is from friction. With the help of the friction between the brake pad and the brake disc (drum) and the tire and the ground, the kinetic energy of the vehicle is converted into the heat energy after friction, and the car is stopped;