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, 2008
Filed:
Apr. 21, 2005
Mario Ricco, Valenzano, IT;
Sisto Luigi DE Matthaeis, Valenzano, IT;
Adriano Gorgoglione, Valenzano, IT;
Antonio Gravina, Valenzano, IT;
Mario Ricco, Valenzano, IT;
Sisto Luigi De Matthaeis, Valenzano, IT;
Adriano Gorgoglione, Valenzano, IT;
Antonio Gravina, Valenzano, IT;
Abstract
A control servo valve () is housed inside the casing () of an internal combustion engine fuel injector (), and has a piezoelectric actuator (), and a control chamber () having a fuel outlet passage (); the outlet passage () comes out inside an annular chamber () defined by a fixed tubular portion () and by a shutter (), which engages the tubular portion () in substantially fluidtight manner and is slid axially by the piezoelectric actuator () from a closed position, in which it closes the annular chamber () and is subjected to a zero axial resultant force by the fuel pressure, to an open position, in which the outlet passage () communicates with a discharge conduit.