The difference between the vacuum supercharger and the vacuum boosteris that the vacuum booster is located between the brake pedal and the brake master cylinder, which is used to increase the driver’s stepping on the master cylinder; while the vacuum supercharger is located in the pipeline between the brake master cylinder and the slave cylinder, which is used to increase the output oil pressure of the master cylinder and increase the braking effect.
Vacuum supercharger is composed of vacuum system and hydraulic system, which is the pressurization device of hydraulic braking system.
Vacuum supercharger is mostly used in medium and light hydraulic brake vehicles. On the basis of the double pipe hydraulic braking system, a vacuum supercharger and a set of vacuum booster system composed of a vacuum check valve, a vacuum cylinder and a vacuum pipeline are added as the force source of braking force, so as to enhance the braking performance and reduce the braking control force.Not only reduces the driver’s labor intensity, but also improves the safety.
When the vacuum supercharger breaks down and works poorly, it often leads to brake failure, brake failure, brake drag and so on.
The vacuum supercharger of hydraulic brake is broken, and the causes are as follows:
If the piston and leather ring of the auxiliary cylinder are damaged or the check valve is not well sealed, the brake fluid in the high-pressure chamber will suddenly flow back to the low-pressure chamber along the edge of the apron or the one-way valve during braking. At this time, instead of exerting force, the pedal will recoil due to the backflow of high-pressure brake fluid, resulting in brake failure.
The opening of vacuum valve and air valve in the control valve controls the gas star entering the afterburner chamber, that is, the opening of vacuum valve and air valve directly affects the afterburner effect. If the valve seat is not sealed tightly, the amount of air entering the booster chamber is insufficient, and the vacuum chamber and air chamber are not isolated tightly, resulting in reduced afterburner effect and ineffective braking.
If the distance between the vacuum valve and the air valve is too small, the opening time of the air valve lags behind, the opening degree decreases, the pressurization effect is slow and the afterburner effect is reduced.
If the distance is too large, the opening of the vacuum valve is not enough when the brake is released, which will cause the brake to drag.
Post time: Sep-22-2020