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:
Aug. 20, 2013
Filed:
Nov. 10, 2011
Gabriele Serra, S. Lazzaro di Savena, IT;
Marco Parotto, Bologna, IT;
Gabriele Serra, S. Lazzaro di Savena, IT;
Marco Parotto, Bologna, IT;
Magneti Marelli S.p.A., Corbetta, IT;
Abstract
A method determines an injection law of a fuel injector to be tested in an injection system and includes steps of: completely interrupting feeding of fuel from a fuel pump to a common rail; avoiding opening of fuel injectors except for one injector to be tested; measuring initial pressure of the fuel inside the rail before starting the opening of the injector; opening the injector for consecutive openings greater than one with a same test-actuation time; measuring final pressure of the fuel inside the rail after ending the opening of the injector; determining a pressure drop in the rail during the opening of the injector, which is equal to a difference between the initial and final pressures; and estimating, according to the pressure drop in the rail, a fuel quantity that is actually injected by the injector when the injector is opened for the test-actuation time.