Method and device for selecting vacuum pump and vacuum tank included in vacuum braking system

The invention discloses a method and a device for selecting a vacuum pump and a vacuum tank included in a vacuum braking system and belongs to the field of electronic control. The method includes that calculating vacuum degree of a front chamber of a vacuum booster when assistance generated from the vacuum booster is minimum, and determining the vacuum degree of the front chamber of the vacuum booster to be minimum vacuum degree required by the vacuum braking system; determining power of the vacuum pump according to the minimum vacuum degree; determining maximum value of volume of the vacuum tank according to layout space of an overall vehicle; and determining the volume of the vacuum tank according to the minimum vacuum degree, the maximum value of the volume of the vacuum tank, effective working volume and atmospheric pressure value of the pump booster. By the method, the power of the vacuum pump and the volume of the vacuum tank can be accurately calculated, and service life of the vacuum pump can be provided.