Solenoid - Fuel Quantity: Operation

WARNING: This page is about a different car, the 2006 Dodge Magnum, 2006 Dodge Charger, and 2006 Chrysler 300. However, it is still accessible from the selected car via links, so may be relevant.

The ECM monitors the fuel system and measures for pressure vibrations. The ECM will then send a pulse width signal to the fuel quantity solenoid to regulate the amount of fuel to the high pressure pump plunger and barrel assemblies. The valve then adjusts the injection correction quantity for each individual cylinder in line with the firing order, there by eliminating the pressure resonance in the fuel rail and improving each independent injectors operation. The fuel quantity solenoid also interrupts the fuel supply to the high pressure pump plunger and barrel assemblies when the engine is switched off.

The ECM detects the operating state which exists at the engine by means of the sensors. In order to adapt the quantity injected, either the rail pressure can be adjusted by way of the fuel pressure solenoid and the fuel quantity solenoid, or the actuation time of the piezo actuators in the fuel injectors can be extended or shortened.

Fuel quantity control is performed under the following operating conditions:

Engine temperature above 10°C (50°F)
Approximately 30 seconds after the engine has started
Fuel temperature > 20°C (68°F)
Engine not in deceleration mode