The servo brake system is based on the human hydraulic braking system, and the brake system is composed of a set of power servo system. It combines the power of the driver and the power provided by the engine as the braking energy. Under normal circumstances, most of the braking energy is supplied by the engine through the power servo system, and the power servo system fails, and the brake can be made entirely by manpower.
Servo brake system is mainly used in hydraulic transmission brake system. The power sources can be divided into two categories: vacuum servo brake system and pneumatic servo brake system. The vacuum power source is the vacuum degree of the inlet pipe when the engine is working. A pneumatic power source is compressed air.
Core components of the working process of the vacuum booster is: under the non-working state, putting control valve return spring to push the valve push rod to the lock lock on the right position, the vacuum one-way valve port in an open position, the control valve spring make close contact with the air valve seat, valve skin bowl to shut down the air valve port. At this time, the real air chamber and the applied air chamber of the vacuum booster are connected with the control valve cavity through the true air chamber passage of the piston body and the air chamber channel, and are isolated from the external atmosphere. After starting the engine, the engine intake manifold vacuum degree rise, then vacuum booster true air chamber, the application of vacuum chamber are rising, and work at any time in the ready state.