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:
Oct. 29, 2013
Filed:
Apr. 07, 2011
Gabriele Serra, San Lazzaro di Savena, IT;
Marco Parotto, Bologna, IT;
Saverio Armeni, Florence, IT;
Luigi Santamato, Bologna, IT;
Romito Tricarico, Ferrara, IT;
Gabriele Serra, San Lazzaro di Savena, IT;
Marco Parotto, Bologna, IT;
Saverio Armeni, Florence, IT;
Luigi Santamato, Bologna, IT;
Romito Tricarico, Ferrara, IT;
Magneti Marelli S.p.A., Corbetta, IT;
Abstract
A method for determining the closing time of an electromagnetic fuel injector including the steps of applying at a starting time of the injection a positive voltage to the coil of the electromagnetic actuator in order to circulate through the coil an electric current which causes the opening of an injection valve; applying at an ending time of the injection a negative voltage to the coil in order to annul the electric current flowing through the coil; detecting the trend over time of the voltage across the coil after the annulment of the electric current flowing through the coil; identifying a perturbation of the voltage across the coil; and recognizing the closing time of the injector that coincides with the time of the perturbation of the voltage.