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. 15, 2013
Filed:
Feb. 07, 2012
Robert Roy Jentz, Westland, MI (US);
David Allen Clemens, Canton, MI (US);
Ann Irene Dezelia, Milan, MI (US);
Aed Mohammad Dudar, Canton, MI (US);
Michael Igor Kluzner, Oak Park, MI (US);
Robert Roy Jentz, Westland, MI (US);
David Allen Clemens, Canton, MI (US);
Ann Irene DeZelia, Milan, MI (US);
Aed Mohammad Dudar, Canton, MI (US);
Michael Igor Kluzner, Oak Park, MI (US);
Ford Global Technologies, LLC, Dearborn, MI (US);
Abstract
A vehicle is provided with a fuel system, a controller, and a diagnostic module with an orifice, a pressure sensor, and a pump, the module connecting the fuel system to atmosphere. The controller measures a reference pressure across the orifice to provide a threshold, isolates the fuel system, and provides a code in response to comparing a series or measured pressures to the threshold. A method for performing an evaporative leak diagnostic is provided. A valve in a diagnostic module is commanded to a vent position. A pump is operated to measure a reference pressure across an orifice to provide a threshold. A valve is commanded to a test position. The pump is operated to place the fuel system in a low pressure state, and a series of pressures in the fuel system is measured. A diagnostic code is provided after comparing the series of pressures to the threshold.