The brake booster assists the brakes by using the vacuum generated in the intake manifold when the engine works. Booster is generally a diameter of about 20cm, the height of about 15cm of the cylinder.
Inside the cylinder is a diaphragm (or piston) with a push rod in the middle, separating the chamber into two parts, one part connected with the engine intake manifold through the pipeline (keeping the vacuum), and the other part when the brake pedal is stepped down and communicated with the atmosphere. Pressure differentials on both sides help provide brakes.
Before the brake pedal treads:
After the brake pedal treads:
Principle of dynamic switching of brake booster balance position
The principle of dynamic shift of the booster in the working process of the equilibrium position. This is a very easy to ignore principle, but also in the structure and process design must take into account the important principle. When the load is finished, the booster will be converted from the load balance position to the equilibrium position of the braking steady state, i.e. the control valve is converted from invisible to visible in the air valve mouth. At this time, the air valve mouth structure design and processing quality can ensure the tightness of the requirements will be severely tested; When the unloading begins, the booster will be converted from the equilibrium position of the braking steady state to the unloading equilibrium position, that is, the control valve is changed from the visible to the invisible in the vacuum valve. At this time, the design of the vacuum valve and the quality of the processing can ensure the tightness of the requirements will be severely tested.