Introduction: What is the function of the vacuum pump on the electric vehicle? Introduction of vacuum pumps on electric vehicles

Electric vehicles are a type of new energy vehicles, and many netizens say that electric vehicles are the ultimate goal of automobile development, because electric vehicles have advantages that cannot be ignored compared to other types of vehicle types. Many consumers usually know these performances of electric vehicles, but few consumers know the internal working principles of electric vehicles, such as what does the vacuum pump of electric vehicles do? The editor will introduce his role to everyone today.

Introduction of vacuum pumps on electric vehicles: electric vehicles

The vacuum boost effect of the brake system is related to the driving safety of the car. In the automobile brake booster system, because the vacuum booster cannot obtain the vacuum or the vacuum obtained is insufficient, the boosting effect of the brake system will be poor. The electric vacuum pump can monitor the vacuum degree change in the booster through the vacuum degree sensor, thereby ensuring that the driver can provide sufficient boosting effect under various working conditions.

Electric vehicles are driven by electric motors, eliminating the traditional engine, so they lose the source of vacuum, that is, they cannot provide vacuum assistance for the automobile brake master cylinder. The electric vehicle vacuum booster pump was created to make up for this shortcoming. It uses the on-board power supply to provide power and pushes the motor on the pump body to move the piston to generate a vacuum. It provides the only and reliable vacuum for the hydraulic brake system of various models of electric vehicles, hybrid vehicles, electric sightseeing cars, electric field vehicles, etc. Source, thereby effectively improving the braking performance of the vehicle.

Introduction of vacuum pumps on electric vehicles: role

The role of the vacuum pump is to generate negative pressure, thereby increasing the braking force. Automobile generator vacuum pump is also called booster pump, it is the booster system of brake system and steering system. The vacuum pump, as the name implies, is used to generate vacuum. Generally, small cars use hydraulic power-assisted brakes, while large trucks or buses generally use steam-powered power-assisted brakes.

The vacuum pumps of automobile generators are generally oil pumps, that is, the vacuum pump core rotates together with the shaft of the generator. Through continuous oil suction and pumping, negative pressure is generated in the vacuum pump casing, that is, vacuum.

Introduction to vacuum pumps on electric vehicles: principle

1. The effect of vacuum boost depends on the relative vacuum, that is, the ratio of the negative pressure in the booster cylinder to the outside atmospheric pressure. It is recommended to collect the pressure in the cylinder and the atmospheric pressure outside the cylinder at the same time, and calibrate the start-stop threshold to two relative vacuum values;

2. The vacuum pumping ability is actually based on the relative vacuum degree, that is, the maximum vacuum degree is the percentage relative to the outside air pressure. The outside atmospheric pressure decreases with the increase in altitude, and the corresponding absolute vacuum in the cylinder also decreases, and the boosting effect will be correspondingly weakened;

3. In terms of control strategy, if the booster cylinder is small, it is recommended that the vacuum pump start trigger is directly related to the brake signal, and only the stop is triggered by the calibrated threshold to improve the boost effect of continuous braking;

4. When using electric vacuum pumps on electric vehicles, it should be considered that under frequent start and stop application conditions, there will be reverse suction at the moment when the exhaust port stops. It is necessary to prevent the inhalation of water and dust.