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:
Dec. 03, 2019
Filed:
Jun. 05, 2018
Applicant:
Ford Global Technologies, Llc, Dearborn, MI (US);
Inventors:
Aed M. Dudar, Canton, MI (US);
Mark Peters, Wolverine Lake, MI (US);
Donald Ignasiak, Farmington Hills, MI (US);
Deborah Dukatz, Canton, MI (US);
John Hefferon, Madison Heights, MI (US);
Assignee:
Ford Global Technologies, LLC, Dearborn, MI (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
F02M 25/08 (2006.01);
U.S. Cl.
CPC ...
F02M 25/0809 (2013.01); F02M 25/0836 (2013.01); F02M 25/0854 (2013.01);
Abstract
A method for diagnosing an evaporative emission control system that includes during a first state of a vapor blocking valve, determining a first rate of change of a fuel tank vacuum, during a second state of the vapor blocking valve different from the first state, determining a second rate of change of the fuel tank vacuum, and diagnosing an operational condition of the vapor blocking valve based on the first and second rates of change.