AJ126
The AJ126 Petrol engine is a liquid cooled V6 unit featuring direct fuel injection, 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 NVH (noise, vibration and harshness) 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 Bosch high pressure direct injection fuel system with fuel pressure provided by two, cam driven high pressure pumps which are driven by a dedicated camshaft. The high pressure pumps supply the fuel rails which in turn supply the three injectors for that bank with fuel at a controlled pressure.
The four camshafts incorporate VCT (variable camshaft timing). VCT allows the timing of the intake and exhaust valves to be adjusted independently of each other. The VCT system is controlled by the Bosch ECM (engine control module) using information from CMP (camshaft position) sensors.
The supercharger is located in the 'vee' of the engine and is driven from the crankshaft by a dedicated secondary drive belt.
The engine meets EU5 emission regulations in Europe and Rest of World (ROW) and ULEV 70 emission regulations in North American Specification (NAS) markets.
The direct fuel injection system, advanced piston and combustion chamber design and the supercharger provide improved fuel consumption and emissions.
Read more about this topic: Jaguar AJ-V6 Engine