Metering Valve 7139-559D

Metering Valve 7139-559D For Lucas DPA Rotary Pumps CAV Diesel Pump

1.Precise Fuel Metering
The valve regulates the fuel flow to the high‑pressure pump based on PWM signals from the ECU. By adjusting the valve opening, the system achieves closed‑loop control of the fuel supply volume.

2.Direct Influence on Injection Quantity
In Delphi common‑rail systems, the flow rate through the metering valve determines how much fuel the high‑pressure pump delivers to the rail. The rail pressure, in turn, directly affects the amount of fuel injected by the injectors. Therefore, the metering valve is a key starting point for controlling the engine’s injection quantity.