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. 29, 2015
Filed:
Jul. 23, 2014
Yichao Guo, Rochester Hills, MI (US);
Robert Stack, Grand Blanc, MI (US);
Yichao Guo, Rochester Hills, MI (US);
Robert Stack, Grand Blanc, MI (US);
FCA US LLC, Auburn Hills, MI (US);
Abstract
A method of diagnosing rationality of a humidity sensor output signal determines that the humidity sensor output signal has passed a rationality diagnostic if the output signal is changing sufficiently. If the output signal is not changing sufficiently, the method determines whether it should be changing sufficiently by whether a humidity capacity index determined based on temperature and pressure local to the humidity sensor is changing sufficiently. If the humidity capacity index is changing sufficiently and the humidity sensor output signal is not, the method determines that the humidity sensor output signal has failed a diagnostic check. Upon determining that the humidity sensor output signal has failed the diagnostic check a predetermined number of times, the method determines that the humidity sensor output signal has failed the rationality diagnostic.