Control Valve, Fuel Flow
- Return spring
- Coil
- Anchor
- Cover
- Pulsation damper
- Outlet valve
- Piston
- Return spring
- PRV (Pressure Relief Valve), safety valve
- Return spring
- Inlet valve
The effective pump stroke is regulated through the control valve, fuel flow, on the high pressure pump in order to supply the correct amount of fuel to the fuel rail. The valve is controlled by the engine control module (ECM) via a 12 V PWM signal. The pump piston position is calculated by the engine control module (ECM) based on the signals from the exhaust camshaft and crankshaft position sensor. The fuel pump in the tank supplies the high-pressure pump with a pressure of approx. 300-620 kPa (3 to 6.2 bar) relative pressure. The pulsation damper contains a gas that compensates the fuel volume changes and pressure shocks through the pulsation damper's corresponding change in volume.