What is the working principle of the car brake system?

There are generally two types of automobile brake systems. One is hydraulic braking; the other is pneumatic braking. Hydraulic brake is delivered to each brake cylinder by the brake master cylinder with brake fluid as the transmission medium through the brake pipeline, so as to achieve the effect of braking and braking; while the pneumatic brake is based on high-pressure gas. The moving medium is sent to each brake sub-cylinder through the pipeline to achieve the braking effect.
The function of the braking system is to make the driving car decelerate or even stop forcibly according to the driver's requirements; make the stopped car park stably under various road conditions (including on the slope); make the car driving downhill The speed remains stable.