METHOD AND DEVICE FOR DETERMINING A REFERENCE CURRENT CURVE FOR A FUEL INJECTOR FOR DETERMINING THE POINT IN TIME OF A PREDETERMINED OPENING STATE OF THE FUEL INJECTOR

摘要

The present invention relates to a method for determining a reference current curve of a fuel injector of a motor vehicle internal combustion engine having a magnetic coil driver. The method includes the steps of: (a) applying a first voltage pulse to the magnetic coil driver of the fuel injector to open the fuel injector, (b) applying a holding voltage to the magnetic coil driver of the fuel injector (C) switching off the holding voltage, (d) allowing the current flowing through the magnetic coil driver for a predetermined period of time such that the fuel injector is kept open, (E) applying a second voltage pulse to the magnetic coil driving unit of the fuel injector, and (f) applying a second voltage pulse to the magnetic coil driving unit of the fuel injector, wherein the current of the current flowing through the magnetic coil driving unit And recording a course along time of the intensity, wherein the recorded course along time forms the reference current curve. The present invention relates to a method, a device, an engine controller, and a computer program for determining a predetermined open time point of an additional fuel injector and controlling the fuel injector.