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. 09, 2003
Filed:
Jun. 18, 2002
Gianni Padroni, Portoferraio, IT;
Magnetti Marelli Powerstrain S.p.A., Turin, IT;
Abstract
A control method for an electromagnetic actuator for the control of a valve of an engine from a rest condition, in which an actuator body actuating the valve is held by at least one elastic body in an intermediate position between two de-excited electromagnets; in order to bring the actuator body into a position of abutment against a first electromagnet, the two electromagnets are alternately excited in order to generate a progressively amplified oscillating movement of the actuator body about the intermediate position, the excitation parameters of each electromagnet being calculated as a function of the difference between the elastic energy statically stored by the elastic body in the abutment position and the mechanical energy dynamically stored in the mechanical system formed by the actuator body and the elastic body.