Air supply (Ver. 2): Notes
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The engine in the Alpina version differs to the BMW AG engine in the following ways:
- 2 exhaust turbochargers
- 2 vacuum-actuated wastegate valves
- 2 catalytic converters and 4 oxygen sensors in the twin-pipe exhaust system
- 2 electrical blow-off valves
| Item | Explanation |
|---|---|
| 1 | Electropneumatic pressure converter (for adjusting the bypass valve on the exhaust turbocharger for cylinders 4 to 6), activated by the DME |
| 2 | Electropneumatic pressure converter (for adjusting the bypass valve on the exhaust turbocharger for cylinders 1 to 3), activated by the DME |
| 3 | Engine ventilation heating |
| 4 | Intake-manifold pressure sensor |
| 5 | Intake air temperature sensor |
| 6 | Electromotive throttle actuator |
| 7 | Electrical blow-off valve |
| 8 | Intake silencer |
| 9 | Charging pressure sensor |
| 10 | Engine |
| 11 | Bypass valves (wastegate valves) |
| 12 | Charge air cooler |
| 13 | Exhaust turbocharger |
| 14 | Non-return valve with pressure limitation (for engine ventilation in the inlet ports) |
| 15 | Non-return valve to the fresh air pipe (for engine ventilation) |