1. The braking system of a family car generally relies on hydraulic pressure as the transmission medium. Compared with the pneumatic braking system that can provide power, it needs an assistant system to respond to the driver. Braking provides assistance, and the booster system of vacuum braking can also be called a vacuum servo system.

2. For vehicles driven by diesel engines, because its engine uses compression ignition, the same level of vacuum pressure cannot be provided at the intake branch pipe, which requires the use of a vacuum source. Vacuum pumps are used, and there are also engines designed for vehicles to meet certain environmental protection requirements for vehicle emissions. They are also needed to provide sufficient vacuum sources to ensure that the vehicles can operate normally.

3. Its function is mainly to use the vacuum generated by the engine when it is working, and then provide enough boost for the driver when stepping on the brake, so that the driver will be more brisk and easy to use when stepping on the brake, but once the vacuum pump is damaged At that time, a certain amount of power is lacking, so when you step on the brakes, you will feel heavier. In addition, the brake effect will be reduced, and sometimes it will even fail, which means that the vacuum pump is damaged.

Extended information

1. 　The electric vacuum pump can provide any vacuum required by vehicles, especially electric vehicles, hybrid vehicles and diesel vehicles. Once the gasoline engine cannot provide enough vacuum, the electric vacuum pump can continuously provide vacuum in time to ensure the normal operation of the brake booster and vacuum brake.

2. Continental conducted a road test on the reduction of carbon dioxide emissions by electric vacuum pumps. The test results show that the electric vacuum pump reduces an average of 1.4 grams to 1.8 grams of carbon dioxide per kilometer. The specific amount fluctuates depending on the fuel and the size of the vehicle.