Controlling movement of armature of electromagnetic actuator for gas exchange valve in vehicle internal-combustion engine, by plotting three curves and e.g. determining working points accordingly

摘要

The method involves plotting a curve (G1) of the magnetic flux achieved at a minimum design temperature of an on-board power supply, a curve (G2) of the change in magnetic flux at maximum current, caused by a change in at least one parameter of an electromagnetic coil (8,9), and a curve (v2) of the current (I) at minimum supply voltage, dependent on the above changes. The curves are plotted in a characteristic graph for values of the changed parameters. An Independent claim is included for an apparatus for controlling the movement of an armature.