The braking effect on the car can only be the external force acting on the car and the direction is opposite to the driving direction of the car, and the magnitude of these external forces are random and uncontrollable, so a series of special devices must be installed on the car to achieve The above functions.
Automobile braking system refers to the special braking mechanism installed on the automobile to ensure the safe driving of the automobile and increase the average speed of the automobile. Generally speaking, the automobile brake system includes two independent devices, the service brake device and the parking brake device. Among them, the service brake device is operated by the driver with his feet, so it is also called the foot brake device. The parking brake device is operated by the driver's hand, so it is also called the hand brake device.
The function of the service brake device is to slow down the driving car or stop in the shortest distance. The function of the parking brake is to keep the cars parked on various roads still. However, sometimes in emergency situations, two braking devices can be used at the same time to increase the effect of car braking. For some special-purpose cars and cars that often drive in mountainous areas, long-term and frequent braking will cause the service brake device to overheat. Therefore, various types of auxiliary brake devices are often added to these cars to stabilize when going downhill. Speed.
According to the situation of braking energy, the braking system can be divided into three types: human braking system, power braking system, and servo braking system. The human braking system uses the driver's physical strength as the braking energy; the dynamic braking system uses the air pressure or hydraulic pressure converted by the engine power as the braking energy; and the servo braking system uses both human and engine power as the braking energy. In addition, according to the transmission mode of braking energy, the braking system can be divided into mechanical, hydraulic, pneumatic and electromagnetic.
In the automobile braking system, the brake is a component used in the automobile braking system to generate the force that prevents the vehicle from moving or moving. The brakes used in cars are friction brakes, that is, the braking torque that prevents the car from moving comes from the friction between the fixed element and the rotating working surface.