Air Intake and Exhaust Systems: Notes
The M57D30T2 US engine exhibits the following special features in the air intake and exhaust system:
- Electric swirl flaps
- Electric exhaust gas recirculation valve (High pressure EGR valve)
- Low pressure EGR (E70 only)
- Turbo assembly adapted for low pressure EGR. (E70 only)
INDEX EXPLANATION CHART
| Index | Explanation |
|---|---|
| 1 | Diesel engine - M57D30T2 |
| 2 | Intake silencer (air filter) |
| 3 | HFM |
| 4 | Compressor bypass valve |
| 5 | Turbocharger - low pressure stage |
| 6 | Turbocharger - high pressure stage |
| 7 | Bypass valve for High Pressure EGR cooler |
| 8 | High-pressure EGR cooler |
| 9 | Temperature sensor for high-pressure EGR |
| 10 | High-pressure EGR valve |
| 11 | Throttle valve |
| 12 | Charge air temperature sensor |
| 13 | Intercooler |
| 14 | Low pressure EGR valve with position sensor |
| 15 | Temperature sensor for low pressure EGR |
| 16 | Low pressure EGR cooler |
| 17 | Exhaust gas temperature sensor - post catalyst (DOC) |
| 18 | Oxidation catalyst and Diesel particle filter (DOC/DPF) |
| 19 | Exhaust gas temperature sensor - pre catalyst (DOC) |
| 20 | Oxygen sensor |
| 21 | Wastegate valve |
| 22 | Turbine control valve |
| 23 | Exhaust pressure sensor (after exhaust manifold) |
| 24 | Swirl port actuator |
| 25 | Boost pressure sensor |
| 26 | Exhaust differential pressure sensor |
| 27 | NOx sensor - pre SCR catalyst |
| 28 | Temperature sensor - post DPF |
| 29 | Dosing (metering) module (for SCR system) |
| 30 | Mixer (for SCR system) |
| 31 | SCR Catalyst |
| 32 | NOx sensor - post SCR catalyst |
| 33 | DDE 7.3 |
| 34 | Muffler (silencer) |