METHOD FOR DETERMINING THE INSTANT OF IMPACT OF FALL OF MOBILE FRAMEWORK, DURING THE DE-EXCITATION OF AN ELECTROMAGNETIC VALVE.

摘要

The invention relates to a method as well as to a device intended to identify the instant of impact of fallout of the movable armature of an electromagnetic valve, in particular a fuel injector, during de-excitation. In order to obtain a signal of impact of fallout of the movable armature, of high likelihood, it is planned, during the fallout movement of the movable armature, to actively establish in the magnetic excitation coil , a measurement current, to produce a magnetic measurement field, during the variation of which, produced by the movement of the movable armature, an induced voltage is maintained even in the case of de-excitation. The device for rapidly de-energizing the electromagnetic valve is advantageously also used for regulating the measurement current.