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:
Sep. 01, 1998
Filed:
May. 27, 1997
Applicant:
Inventors:
Christopher Kirk Davey, Novi, MI (US);
Anand J Shah, Canton, MI (US);
Donald Fenwick Dickison, Sterling Heights, MI (US);
David R Nader, Farmington Hills, MI (US);
Robert Joseph Jerger, Livonia, MI (US);
Michael Igor Kluzner, Oak Park, MI (US);
Assignee:
Ford Global Technologies, Inc., Dearborn, MI (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01M / ;
U.S. Cl.
CPC ...
73-106 ;
Abstract
An on-board diagnostic test for an exhaust gas oxygen sensor includes sensing the output of the oxygen sensor and summing the output over a specified period to determine the length of the trace of the sensor voltage versus time. Such length over a given time period indicates the activity of the sensor. This data is compared to a threshold to determine if the exhaust gas oxygen sensor meets certain performance requirements.