METHOD AND APPARATUS FOR DRIVING FLOW CONTROL ELECTROMAGNETIC PROPORTIONAL CONTROL VALVE

摘要

A method for driving an electromagnetic proportional control valve(44E)for the flow control of a common rail system pump which enables flow rate adjustment by adjusting the duty ratio of a pulse voltage to be impressed on a solenoid coil(F)of an electromagnetic solenoid(44E).When the electromagnetic proportional control valve(44)is in an operating condition that hysteresis may occur in action,the peak value or pulse width of a pulse voltage is increased temporarily to enhance the drive power of the electromagnetic solenoid(44E)momemtarily.This process ensures a smooth operation of a piston(44C)to stabilize flow control.