Classification of Automotive Braking System
Brakes can be divided into friction and non-friction two categories. ① friction brake. Press the friction between the brake and the moving parts. ② non-friction brake. The structure of the brake is mainly magnetic brake (the use of magnetic particles generated by the shear force to brake), magnetic eddy current brake (by adjusting the excitation current to adjust the size of the braking torque) and water vortex brake. According to the structure of the brake parts can be divided into external block brakes, the internal brake shoe, belt brakes, disc brakes, etc .; according to the working state of the brake can also be divided into normally closed brake In the tight state, the need to exert external force to lift the brake) and normally open brake (often in the loose state, the need to exert external force can be braking); by manipulation can also be divided into human, hydraulic, Manipulated brakes. According to the role of the brake system Brake system can be divided into traffic brake system, parking brake system, emergency braking system and auxiliary braking system. In the above braking systems, the parking brake system and the parking brake system are required for each vehicle. Brake control The energy braking system can be divided into human braking system, dynamic braking system and servo braking system. The brake system, which is the only braking energy of the driver's body, is called a human braking system; a system that is completely braked by the potential energy of the engine or the pneumatic energy of the hydraulic form is called a dynamic braking system; The braking system for braking of manpower and engine power is called a servo brake system or a power brake system. According to the braking energy transmission system Brake system can be divided into mechanical, hydraulic, pneumatic, electromagnetic and so on. At the same time using two or more transmission mode of the brake system known as the modular braking system.
In recent years, the speed of cars has been increasing, and the total weight of trucks and buses has been increasing. In addition, the center of gravity of the car is generally reduced and the use of small diameter wide cross-section of the tire, so that the installation of the brake is limited, so the use of heavy trucks and cars with good braking heat stability can be a growing number of disc brakes. The disc brakes can be divided into clamp disc brakes and full brake two. Disc brakes, also known as disc brakes, the working principle can be used to describe a dish, you use the thumb and forefinger to hold the rotating plate, the plate will stop spinning. The disc brakes on the car are made up of brake oil pumps, a brake disc connected to the wheel and a brake calipers on the disc. Brake, the high-pressure brake oil to promote the piston within the caliper, the brake shoe will be pressed against the brake disc to produce the braking effect. Disc brakes disc brakes sometimes called disc brakes, it is divided into ordinary disc brakes and ventilated disc brakes two. Ventilated disc brakes are a gap between the two brake discs, so that the air flow through the gap, and some ventilation plate is still drilling a lot of circular vent holes in the disk, or cut out in the disk surface ventilation Or prefabricated rectangular vent holes. Ventilation disc brakes use the role of wind, the hot and cold effect better than ordinary disc brakes. The main advantage of the disc brakes is the rapid braking when the high-speed brakes, the cooling effect is better than the drum brakes, the braking performance of the constant good, easy to install like ABS as high-level electronic equipment. The main advantage of the drum brake is the brake shoe less wear, low cost, easy to repair, because the drum brake absolute braking force is much higher than the disc brakes, it is generally used for rear-wheel drive truck.
