Patent ID: 6418003
Filing Date: 2002-07-09
Classification: F01L

Abstract:
A method for generating a current command to a controller for an electromagnetic valve actuator system having a controller, a power stage and an electromagnetic actuator having an armature therein, said method comprising the steps of:supplying said controller with a feedback signal from the position of the armature, a reference waveform representing a desired movement for the armature, and a spring force constant; processing said position feedback signal, said reference waveform and said spring coefficient to generate a desired force, Fem; dividing said desired force, Fem into a closing force component, Femâ€”c, and an opening force component, Femâ€”o; individually processing each component with a fixed constant to produce a closing current command, Ic_cmd and an opening current command, Io_cmd; and communicating said current commands from the controller to the power stage for generating the current necessary to move the armature.