Method of controlling an electromagnetic valve actuator
AssigneeVisteon Global Technologies, Inc.
InventorsIbrahim Haskara, Lawrence Mianzo, Vladimir Kokotovic
Life of this patent
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Abstract
Four preferred methods are disclosed for controlling an electromagnetic valve actuator having a valve head that moves between an open position and a closed position against a valve seat, an armature coupled to the valve head, and a solenoid coil near the armature. The preferred methods include: measuring the position of the armature, estimating the speed of the armature based on the measured position of the armature, computing a desired signal based on the measured position, the estimated speed, and a reference trajectory, and controlling the solenoid coil to softly seat the armature against the solenoid coil and the valve head against the valve seat based on the computed desired signal.
Claims6
A method of controlling an electromagnetic valve actuator having a valve head that moves between an open position and a closed position against a valve seat, an armature coupled to the valve head, and a solenoid coil near the armature, said method comprising:
- measuring the position of the armature and the current of the solenoid coil;
- estimating the speed of the armature based on the measured position of the armature;
- estimating a disturbance force based on the measured position of the armature and the measured current of the solenoid coil;
- computing a desired signal based on the measured position, the estimated speed, the disturbance force and a reference trajectory;
- and
- controlling the solenoid coil to softly seat the armature against the solenoid coil and the valve head against the valve seat based on the computed desired signal.
A method of controlling an electromagnetic valve actuator having a valve head that moves between an open position and a closed position against a valve seat, an armature coupled to the valve head, and a solenoid coil near the armature, said method comprising:
- measuring the position of the armature and the current of the solenoid coil;
- estimating the speed of the armature based on the measured position of the armature;
- computing a desired signal based on the measured position, the estimated speed, the disturbance force and a reference trajectory;
- estimating a generated magnetic force for the armature based on the measured position of the armature and the measured current of the solenoid coil;
- and
- controlling the solenoid coil to softly seat the armature against the solenoid coil and the valve head against the valve seat based on the computed desired signal and the estimated generated magnetic force.
Dependencies are inferred from the claim text.