Vacuum Pump
The vacuum pump is similar to that used on the N63 engine. It is a two-stage pump and therefore has two connections. The first stage is for the brake booster and the second for the auxiliary consumers.
INDEX EXPLANATION CHART
| Index | Explanation |
|---|---|
| 1 | Non-return valve for brake booster |
| 2 | Non-return valve for auxiliary consumer |
| 3 | Connection opening for auxiliary consumers |
| 4 | Vacuum pump housing |
| 5 | Vane |
| 6 | Connection opening for brake booster |
The largest area is used for the first stage, ensuring vacuum is built up at a rapid rate for the brake booster. The last section is the opening stage for the auxiliary consumers. It therefore takes longer to build up the vacuum here, as shown in the following diagram.
This solution takes into account the different requirements for the brake booster and the auxiliary consumers.
INDEX EXPLANATION CHART
| Index | Explanation |
|---|---|
| 1 | Vacuum |
| 2 | Time |
| 3 | Delivery rate for auxiliary consumers |
| 4 | Delivery rate for brake booster |