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US 7,121,525 B2Granted
Method of determining a clearance
AssigneeJohnson Controls Technology Company
InventorNicolas Gelez
Life of this patent
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AssigneeJohnson Controls Technology Company
InventorNicolas Gelez
Estimating the term…
A method of determining timing clearance between a valve stem and a moving member using an electromagnetic actuator comprising electromagnets, an electromagnet for moving the moving member from a closed position towards an open position and an electromagnet for moving the moving member from an open position towards a closed position, each electromagnet being controlled on the basis of a reference electrical characteristic, the method comprising: controlling an electromagnet to obtain a displacement speed for a moving member as the moving member moves from one of a closed position or an open position towards the other one of an open position or a closed position; obtaining values of a reference electrical characteristic for intermediate positions of the moving member; and detecting an intermediate position at which the reference electrical characteristic is subject to a sudden change.
A method of determining timing clearance between a valve stem and a moving member using an electromagnetic actuator comprising electromagnetic displacement means which comprise electromagnets for moving the moving member between an extreme closed position and an extreme open position, the electromagnets of the electromagnetic displacement means being controlled by servo-control means on the basis of a reference electrical characteristic, the method comprising:
A method of determining timing clearance between a valve stem and a moving member using an electromagnetic actuator comprising electromagnets, the actuator being controlled on the basis of a reference electrical characteristic, the method comprising:
Dependencies are inferred from the claim text.