The air intake system function is described in the schematic diagram below.
Schematic Diagram
| 1. | Air intake |
|---|---|
| 2. | Air cleaner assembly |
| 3. | Mass air flow meter and temperature sensor |
| 4. | Turbocharger |
| 5. | Breather valve 1) |
| 6. | Intercooler |
| 7. | Charge pressure sensor |
| 8. | Cooled exhaust gas to EGR valve – see “Functional Description: Exhaust Gas Recirculation” |
| 9. | EGR valve – see “Functional Description: Exhaust Gas Recirculation” |
| 10. | Air flap |
| 11. | To intake manifold |
1
) During idling, the valve remains open under internal spring pressure. Under load conditions, the valve closes by the vacuum created in the turbocharger intake hose.