Electric vacuum pump
WARNING: This page does not describe the selected car, but rather 45 other vehicles, including the 2016 BMW M5, 2016 BMW 550i xDrive, 2016 BMW 550i, 2016 BMW 535i xDrive, and 2016 BMW 535i. However, it is still accessible from the selected car via links, so may be relevant.
Various components of the engine rely on the supply of a partial vacuum. The engine has a mechanical vacuum pump the necessary partial vacuum. The vacuum supply must also be ensured in phases in which the engine is switched off. This is why the vacuum system has been extended to include an electric vacuum pump. As soon as the partial vacuum in the system falls short of a certain threshold value, the electric vacuum pump is activated. The partial vacuum is measures by a partial vacuum sensor in the brake booster; this is already familiar from vehicles with the automatic engine start/stop function.
| Index | Explanation |
|---|---|
| 1 | Vacuum line |
| 2 | Brake servo |
| 3 | Brake vacuum sensor |
| 4 | Electric vacuum pump |
| 5 | Mechanical vacuum pump |