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 | Variable Geometry Turbine (VGT) actuator |
| 6 | Charge air outlet connection |
| 7 | Variable Geometry Turbine (VGT) actuator rod |
| 8 | Oil feed pipe - High Pressure (HP) turbocharger |
| 9 | High Pressure (HP) Exhaust Gas Recirculation (EGR) connection |
| 10 | Oil filter and housing assembly |
| 11 | Vacuum actuator - High Pressure (HP) turbocharger Turbine Bypass Valve (TBV) |
| 12 | Exhaust gas outlet connection |
| 13 | Exhaust gas inlet connection |
| 14 | Oil drain pipe - High Pressure (HP) turbocharger |
| 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) turbocharger with a Variable Geometry Turbine (VGT) for quicker spool up at low engine speed and a Low Pressure (LP) fixed turbocharger with a wastegate. The LP turbocharger provides boost at high engine speed and load.
The two turbochargers are connected in series that utilizes bypass regulation so the boost pressure from the HP turbocharger can be 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 turbochargers in a series sequential system helps to drive the high boost pressures needed to maximize 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 turbocharger Turbine Bypass Valve (TBV) actuator. The LP turbocharger wastegate valve actuator regulates the maximum boost pressure produced by the LP turbocharger at very high engine speed and load. The HP VGT turbine bypass valve actuator controls the exhaust gas flow to the LP turbocharger. Both vacuum actuators are controlled by an Electronic Vacuum Regulating Valve (EVRV). The Powertrain Control Module (PCM) controls the operation of the EVRV.