Method of determining a clearance

Details Method of determining a clearance Method of determining a clearance

2006-10-17

2006-10-17

Jacyna, J. Casimer (Department: 3751)

Valves and valve actuation

Electrically actuated valve

Including solenoid

C251S129100, C251S129150, C137S001000, C137S551000, C137S553000, C123S090110

Reexamination Certificate

active

07121525

ABSTRACT:
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.

REFERENCES:
patent: 5711259 (1998-01-01), Pischinger et al.
patent: 5832955 (1998-11-01), Schrey
patent: 6167852 (2001-01-01), Kamimaru et al.
patent: 6247432 (2001-06-01), Pischinger et al.
patent: 7014167 (2006-03-01), Fuwa

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