The function of automobile brake drum
TIME：2020.01.08
The brake master pump belongs to the brake drum system of the automobile, its function is mainly to provide brake assistance, only after the vehicle engine is started, can it have the brake assistance effect, the buses and trucks adopt the air pump assistance system, the main oil brake master pump is the vacuum booster pump. When the master pump is used as a booster, the driver can control the pressure of the separated pump oil acting on the brake pedal when the brake pressure is applied, if the gas car did not start the engine, then even if the use of force, the brake pedal can not be pressed to the end. The external forces acting on the vehicle braking can only be those acting on the vehicle and acting in the opposite direction to the driving direction, and the magnitude of these external forces is random and uncontrollable, therefore, a series of special devices must be installed on the vehicle to realize the above functions. The automobile brake system is a special brake mechanism installed on the automobile in order to ensure the safety of the automobile and increase the average speed of the automobile. Generally speaking, the automobile brake system includes two separate sets of running brake and stopping brake. The driving brake is controlled by the driver's foot, so it is also called foot brake. The parking brake is operated by the driver's hand, so it is also called hand brake. The function of the running brake is to slow down the moving car or to stop the car within the shortest distance. The function of the parking brake is to keep the car still on all kinds of roads. However, sometimes in an emergency, two kinds of braking devices can be used at the same time to increase the effectiveness of the car braking. In special-purpose vehicles and those frequently used in mountainous areas, long-term and frequent braking will lead to overheating of the vehicle's braking devices, so various types of auxiliary braking devices are often added to these vehicles, in order to stabilize the car on the downhill side. According to the situation of braking energy, the braking system can be divided into three kinds: human braking system, power braking system and SERVO braking system. The power brake system uses the air pressure or the hydraulic pressure converted by the engine power as the braking energy, while the Servo brake system uses both the human power and the engine power as the braking energy. In addition, according to the transfer of braking energy, braking system can be divided into mechanical, hydraulic, pneumatic and electromagnetic type to several. In the brake system of automobile, the brake drum is the part of the brake system which produces the force to stop the vehicle movement or the movement tendency. The brakes used in all types of vehicles are friction brakes, i. e. the braking moment that stops the vehicle from moving is caused by friction between the fixed elements and the rotating working surface.
