Brake system function
Decelerating or even stopping the moving car, keeping the speed of the downhill car stable, and keeping the stopped car stationary. These functions are collectively referred to as braking; a series of special devices installed on the car for the driver According to the roads and traffic conditions, the outside world (mainly the road surface) exerts a certain force on some parts of the car (mainly the wheels) to brake the car to a certain extent. This control can brake the car. The external force is called the braking force; such a series of specialized devices is called the braking system.
Such a brake system for decelerating or even stopping a running car is called a service brake system; a device for parking a stopped car in place is called a parking brake system. These two brake systems are required for every car.