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:
Nov. 01, 2011
Filed:
Feb. 05, 2009
Cheryl J Stark, Canton, MI (US);
James M Dixon, Commerce Township, MI (US);
Scott R Gordon, Ann Arbor, MI (US);
Michael Christopher Luckham, Highland, MI (US);
Cheryl J Stark, Canton, MI (US);
James M Dixon, Commerce Township, MI (US);
Scott R Gordon, Ann Arbor, MI (US);
Michael Christopher Luckham, Highland, MI (US);
Abstract
A sensor diagnostic system comprises first, second, and third dosing agent sensors and a control module. The first, second, and third dosing agent sensors indicate whether a dosing agent is present at first, second, and third volumetric levels of a dosing agent tank, respectively. The second volumetric level is greater than the first volumetric level and the third volumetric level is greater than the second volumetric level. The control module selectively diagnoses a sensor fault in at least one of the first, second, and third dosing agent sensors based on the indications of the first, second, and third dosing agent sensors.