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. 25, 2014
Filed:
Feb. 24, 2012
Etsuko Muraji Stewart, Laingsburg, MI (US);
Scott H. Wittkopp, Ypsilanti, MI (US);
Stuart R. Smith, Howell, MI (US);
Etsuko Muraji Stewart, Laingsburg, MI (US);
Scott H. Wittkopp, Ypsilanti, MI (US);
Stuart R. Smith, Howell, MI (US);
Abstract
A system for a vehicle includes a conversion efficiency module, a threshold determination module, and a catalyst fault indication module. The conversion efficiency module generates an ozone conversion efficiency of a catalyst that converts ozone into oxygen based on a first amount of ozone in air measured upstream of the catalyst and a second amount of ozone in air measured downstream of the catalyst. The threshold determination module generates an efficiency threshold based on ambient humidity. The catalyst fault indication module selectively indicates that a fault is present in the catalyst when the ozone conversion efficiency is less than the efficiency threshold.