Failure of traditional vacuum assisted braking system

Will lead to brake pedal hardening, air leakage, abnormal sound, engine failure lights, etc. In order to get enough braking force, you need to press the brake pedal harder than before. Vacuum power pump failure. When the brake is depressed, the internal sealing mechanism will isolate the front and rear cavities of the brake power pump. Due to the air pressure difference between the two chambers, atmospheric pressure will act on the membrane in the power pump. Assuming that the pressure of the front and rear chambers is equal due to the leakage of the diaphragm, the braking force will weaken or even disappear. At this point, the owner will feel that the brakes are "hard" and it takes a lot of effort to get enough braking force. Million car purchase subsidy