Turbocharger - Vehicles With INGENIUM I4 2.0L Diesel 240PS Engine
| ITEM | DESCRIPTION |
|---|---|
| 1 | Oil feed pipe - Low Pressure (LP) turbocharger |
| 2 | Vacuum actuator - Low Pressure (LP) turbocharger wastegate valve |
| 3 | Water Cooled Compressor Cover (WCCC) engine coolant inlet connection |
| 4 | Water Cooled Compressor Cover (WCCC) engine coolant return connection |
| 5 | High Pressure (HP) Variable Geometry Turbocharger (VGT) vane actuator |
| 6 | Charge air outlet connection |
| 7 | High Pressure (HP) Variable Geometry Turbocharger (VGT) vane actuator rod |
| 8 | Oil feed pipe - High Pressure (HP) Variable Geometry Turbocharger (VGT) |
| 9 | High Pressure (HP) Exhaust Gas Recirculation (EGR) connection |
| 10 | Oil filter and housing assembly |
| 11 | Vacuum actuator - High Pressure (HP) Variable Geometry Turbocharger (VGT) turbine bypass valve |
| 12 | Exhaust gas outlet connection |
| 13 | Exhaust gas inlet connection |
| 14 | Oil drain pipe - High Pressure (HP) Variable Geometry Turbocharger (VGT) |
| 15 | Oil drain pipe - Low Pressure (LP) turbocharger |
Vehicles with Ingenium I4 2.0L Diesel 240PS engine are equipped with a series sequential twin turbocharger system. It provides an improved specific power level and increased torque across a broad speed range.
The twin turbocharger system comprises two different sized turbochargers. A smaller, High Pressure (HP) Variable Geometry Turbocharger (VGT) for quicker spool up at low engine speed and a Low Pressure (LP) fixed vane type turbocharger. The LP turbocharger takes care of high engine speed.
The two turbochargers are connected in series that utilize bypass regulation so the boost pressure from the HP VGT is further multiplied by the LP turbocharger.
Regulated series sequential twin turbocharging therefore allows for continuous adaptation on the turbine and compressor sides to the actual requirements of the operating engine.
Matching two turbos in a series sequential system helps to drive the extremely high boost pressures needed to optimize the benefits of Exhaust Gas Recirculation (EGR). This is also a key factor in emissions control. For additional information, refer to: ENGINE EMISSION CONTROL
Two vacuum controlled actuators are installed within the twin turbocharger system, an LP turbocharger wastegate valve actuator and a HP VGT turbine bypass valve actuator. The LP turbocharger wastegate valve actuator regulates the maximum boost pressure produced by the LP turbocharger. The HP VGT turbine bypass valve actuator controls the exhaust gas flow to the LP turbocharger. Both vacuum actuators are controlled by the Electronic Vacuum Regulating Valve (EVRV). The Powertrain Control Module (PCM) controls the operation of the EVRV.