Patent ID: 6024071
Filing Date: 2000-02-15
Classification: F02D,H01F

Abstract:
A method for signaling an energizing coil of a solenoid-operated reciprocating plunger pump employed as a fuel injection device, in which the energizing coil is energized via a current control circuit pulsed at high-frequency by an energizing current and each pulse causes an impulse movement of an armature driven by the energizing coil, and said current control circuit controls said energizing current flowing through said energizing coil as a function of a current setpoint curve, said method comprising the steps of:forming each pulse of said current setpoint curve with a gradually rising leading edge resulting in a corresponding gradually rising leading edge of said pulse of said energizing current in said energizing coil; andcontrolling said current setpoint curve so that said energizing current does not change faster than the maximum change in current possible for the minimum voltage available at said energizing coil and limited due to mutual induction.