The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 30, 2003
Filed:
Dec. 15, 2000
Magneti Marelli S.p.A., Milan, IT;
Abstract
A method for controlling electromagnetic actuators for operating induction and exhaust valves in internal combustion engines where one actuator, connected to a control unit, is coupled to a respective valve having a real position and includes a movable element magnetically driven by means of a resultant force to control the movement of the said valve between a closure position and a fully open position; the control unit is further connected to a piloting unit and includes a supervision block, an open loop control block, a closed loop control block and a selector block commanded by a switching signal generated by the supervision block. The method includes the steps of: operating in an open loop control mode of the real position; operating in a closed loop control mode of the real position; and alternatively selecting the open loop control mode and the closed loop control mode.