Description And Operation: Engine: Overview

The V6 SC (SuperCharged) 3.0L Petrol engine is a liquid cooled V6 unit featuring Direct Injection (DI), four overhead camshafts and four valves per cylinder.

The main structural components of the engine are all manufactured from aluminum alloy. The engine is built around a very stiff, lightweight, enclosed V, deep skirt cylinder block. A structural windage tray is bolted to the bottom of the cylinder block to further improve the block stiffness, minimize Noise, Vibration and Harshness (NVH) and help reduce oil foaming. To further enhance the stiffness of the lower engine structure, a heavily ribbed sump body is installed. The sump body also helps to reduce engine noise.

The engine uses a High Pressure (HP) DI fuel system with fuel pressure provided by two, cam driven HP fuel pumps which are driven by a dedicated camshaft. Each HP pump supplies a fuel rail which in turn supplies the three injectors for that bank with fuel at a controlled pressure.

The four camshafts incorporate Variable Camshaft Timing (VCT). VCT allows the timing of the intake and exhaust valves to be adjusted independently of each other. The VCT system is controlled by the Powertrain Control Module (PCM) using information from Camshaft Position (CMP) sensors.

The supercharger is located in the 'vee' of the engine and is driven from the crankshaft by a dedicated accessory drive belt.

The engine meets EU6 emission regulations in Europe and ROW (Rest of World) and ULEV 70 emission regulations in North American Specification (NAS) vehicles.

The DI system, advanced piston and combustion chamber design and the supercharger provide improved fuel consumption and emissions.

Various engine systems are located on the engine assembly and driven directly and indirectly by the engine operation.

Refer to relevant article for the further information:

• Engine cooling For additional information, Refer to: ENGINE COOLING .
• Supercharger cooling For additional information, Refer to: SUPERCHARGER COOLING
• Fuel system For additional information, Refer to: FUEL CHARGING AND CONTROLS .

• Accessory drive For additional information, Refer to: ACCESSORY DRIVE - V6 S/C 3.0L PETROL (G1851445)
• Starting system For additional information, refer to: STARTING SYSTEM .
• Electronic engine controls. For additional information, Refer to: ELECTRONIC ENGINE CONTROLS .