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. 03, 2017
Filed:
May. 08, 2015
Ford Global Technologies, Llc, Dearborn, MI (US);
Aed M. Dudar, Canton, MI (US);
Russell Randall Pearce, Ann Arbor, MI (US);
Dennis Seung-Man Yang, Canton, MI (US);
Robert Ognjanovski, Jr., Shelby Township, MI (US);
Mahmoud Yousef Ghannam, Canton, MI (US);
Ford Global Technologies, LLC, Dearborn, MI (US);
Abstract
A fuel system is provided, including a fuel tank isolation valve comprising an actuation coil and a latchable valve shaft at least partially disposed within the actuation coil. A controller may be configured to indicate a position of the valve shaft based on a measured current-voltage relationship between the first and second terminal wires during a condition in which the magnetic field generated by actuation coil current has a flux density below a threshold required to adjust a position of the latchable valve shaft. In this way, the position of the latchable valve shaft may be indicated without moving the valve shaft, and without requiring a dedicated valve position sensor.