The hydraulic brake has the characteristics of compact structure, fast response speed, and long service life. The fluid provided can be continuously circulated in the brake, which has greatly improved the environmental protection. A variety of technical means have also been adopted to effectively protect the brake while reducing the occurrence of faults. It is undoubtedly beneficial for the guarantee of tires and vehicle loads, with low cost and strong functions. The disc brake is mainly composed of the brake master cylinder, brake hose, brake wheel cylinder, brake disc, etc. The brake master cylinder is fixed on the steering handle and consists of a main hydraulic cylinder, a manual brake handle (or brake pedal), a housing, a plunger, and a leather cup. One end of the brake hose is connected to the brake master cylinder, and the other end is connected to the brake wheel cylinder. The pipe is filled with hydraulic oil. The brake wheel cylinder is connected to the front shock absorber and is a fixed part of the brake, consisting of an oil cylinder and a piston, with each piston facing a friction plate at the front end. The brake disc is fixed to the front wheel and rotates with the wheel, which is the rotating part of the brake. A series of specialized devices that can forcibly reduce the driving speed of a car. The braking system mainly consists of four parts: energy supply device, control device, transmission device, and brake. The main function of the braking system is to slow down or even stop a moving car, maintain a stable speed when driving downhill, and keep a stopped car stationary. As the brake friction pads are vulnerable parts, they need to be replaced regularly. The friction plates of drum brakes are connected by rivets, and when replacing the friction plates, the rivets need to be removed and replaced, resulting in a particularly long maintenance time; The installation and connection of the friction lining of the Disc brake is relatively simple. The friction lining on the brake caliper can be easily taken out with an ordinary box wrench, which can greatly shorten the working hours and increase the attendance rate. The main reason is that the brake disc is prone to high temperature after a long time of braking, while the brake disc after high temperature should not be drenched with water, which is easy to crack and cause brake failure. Driving is very dangerous. The road conditions in China are very complex, and it is inevitable to encounter long and steep slopes. If there is no auxiliary braking technology such as in cylinder braking, continuous braking for a long time will cause significant damage to the brake discs, which is also an unbearable loss for users. On the contrary, if the Disc brake axle is installed and the engine with the in cylinder brake technology is installed, the vehicle will have a very high driving safety. The brake system is a series of special devices YWZ13 outline drawings used on the vehicle to make the outside world (mainly the road surface) exert a certain force on some parts of the vehicle (mainly the wheels), so as to carry out a certain degree of forced braking