Fuel Charging And Controls: Operation
Fuel charging is achieved with a Low Pressure (LP) and a High Pressure (HP) fuel system.
The LP fuel system comprises:
- A fuel tank
- A fuel pump module
- A fuel supply and return lines
- A fuel filter with water in fuel sensor
- A fuel cooler.
For additional information, Refer to: FUEL TANK AND LINES
The HP fuel system comprises:
- A HP fuel pump and fuel metering valve
- A fuel rail with integral fuel rail Pressure Control Valve (PCV) and Fuel Rail Pressure (FRP) sensor
- Fuel injectors (4 off)
- HP connecting pipes
- Fuel leak-off pipes.
Fuel injection pressure is generated independently of engine speed and fuel injection events. The High Pressure (HP) fuel system is controllable to the optimum level for smooth operation.
The HP system is capable of developing an injection pressure up to:
- 1, 800 bar (26, 107 lbf/in2 ) - Ingenium I4 2.0L Diesel 163 PS and 180 PS engine variants
- 2, 200 bar (31, 908 lbf/in2 ) - Ingenium I4 2.0L Diesel 240 PS engine variant.
The fuel injection timing and volume are calculated by the Powertrain Control Module (PCM). The PCM energizes the appropriate solenoid actuated injector to provide the correct timing and injection volume.
The fuel system features a pre-injection (pilot) phase to reduce combustion noise and mechanical load. On vehicles installed with a Diesel Particulate Filter (DPF), the fuel system also provides a post-injection phase that is required for regenerating the DPF.
This type of fuel system allows the Ingenium I4 2.0L diesel engine to achieve excellent levels of performance and engine response. The fuel system enables the engine to meet current and future exhaust emission legislation.