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:
Jan. 10, 2012
Filed:
Jul. 27, 2009
Michael J. Lucido, Northville, MI (US);
Wenbo Wang, Novi, MI (US);
Christopher R. Graham, Lake Orion, MI (US);
Michael J. Lucido, Northville, MI (US);
Wenbo Wang, Novi, MI (US);
Christopher R. Graham, Lake Orion, MI (US);
Abstract
A diagnostic system for a pressure sensor includes a fuel pump module and a diagnostic control module. The fuel pump module activates a first pump and deactivates a second pump when an engine is operating in a diagnostic mode. The first pump supplies fuel to the second pump and the second pump supplies fuel to fuel injectors of the engine via a fuel rail. The diagnostic control module receives a measured pressure signal from a pressure sensor that indicates a pressure of the fuel rail during the diagnostic mode. The diagnostic control module detects a fault of the pressure sensor based on a comparison between the measured pressure signal and the commanded pressure signal for the first pump.