•  By controlling the supply pump intake amount, the fuel metering valve controls the pressure pump feed amount and the pressure inside the fuel injection pipe.

•  The intake amount is determined by the total opening size of the valve as controlled by the duty value of the solenoid actuation current.

•  The duty solenoid can adjust the open and close time ratio to control the intake amount by changing the OFF time during a single cycle. For a normally open type fuel metering valve, making the duty ratio larger increases the intake amount and, conversely, making the duty value smaller decreases the intake amount.