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:
Jul. 07, 2015
Filed:
Aug. 21, 2012
Jonathan T. Shibata, Whitmore Lake, MI (US);
Michael J. Lucido, Northville, MI (US);
Jonathan T. Shibata, Whitmore Lake, MI (US);
Michael J. Lucido, Northville, MI (US);
GM Global Technology Operations LLC, Detroit, MI (US);
Abstract
A system for a vehicle includes a voltage measuring module, a second derivative module, a closing period module, and an injector driver module. The voltage measuring module measures first and second voltages at first and second electrical connectors of a fuel injector that injects fuel directly into a cylinder of an engine. The second derivative module determines a second-order derivative of a difference between the first and second voltages. The closing period module determines a closing period of the fuel injector based on the second-order derivative of the difference. The injector driver module selectively adjusts closing of the fuel injector based on the closing period.