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Fuel Charging and Controls Principle of operation Common rail diesel The 2.7L fuel injection system is a common-rail design, running at the high-pressures (up to 1,650 bar or 23,930 lb/in²) typical of such systems.
The fuel is drawn from the fuel tank by an electric fuel pump module and delivered to the transfer pump side of a fuel injection pump driven by the engine. For additional information on the fuel injection pump, Fuel Charging and Controls
The fuel volume control valve (FVCV) regulates the amount of fuel supplied to the high-pressure side of the fuel injection pump, while the fuel pressure control valve (FPCV) regulates the pressure.
The high-pressure fuel is delivered to the fuel rail where it is stored, ready for use by the fuel injectors.
The fuel injectors are Piezo type, and are controlled by the engine control module (ECM) from inputs from the engine management sensors.
The fuel injectors operate in stages, giving a pilot injection before the main injection to reduce detonation noise and help improve the efficiency of the engine.
For additional information, Fuel Charging and Controls Overview There are changes to the engine management system (EMS) for 2006 my, the most obvious of which will be the change to 7-digit diagnostic trouble codes (DTCs) from the familiar 5-digit.
Refer to the DTC index in this section for guidance on how to use these codes with the Jaguar approved diagnostic system or a scan tool. Inspection and Verification WARNING: Do NOT carry out any work on the fuel system with the engine running. The fuel pressure within the system can be as high as 1650 bar (23,930 lb/in²). Failure to follow this instruction may result in personal injury.
WARNING: Eye protection must be worn at all times when working on or near any fuel |