Functional description
The charging pressure is regulated by the engine control via a wastegate valve. The wastegate valve is adjusted pneumatically by a diaphragm box. An pressure converter applies a partial vacuum to the diaphragm box.
The engine control activates the pressure converter by means of a pulse-width modulated signal. This sets a corresponding partial vacuum at the pressure converter, and this determined the opening angle of the wastegate valve.
| Index | Explanation |
|---|---|
| 1 | Exhaust turbocharger for bank 2 |
| 2 | Vacuum reservoir |
| 3 | Vacuum unit |
| 4 | two-pin plug connection |
| 5 | Pressure converter, wastegate valve 2 |