Controlling method for fuel injection in engine, involves adjusting voltage application time to shift actual injection start time to desired injection start time

摘要

A parameter corresponding to a ramp time is measured between a voltage application time and an actual injection start time. The voltage application time is adjusted to shift the actual injection start time to a desired injection start time after detecting a difference between the actual injection start time and the desired injection start time. The voltage application time corresponds to a time when an applied voltage is applied to an injector coil, and the actual injection start time corresponds to a time when a load current through the injector coil reaches a desired level. Independent claims are also included for the following: (a) a fuel injection system for engine; (b) a current regulator for controlling load current through injector coil; and (c) an adaptive voltage source for current regulator.