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:
Jun. 10, 2008
Filed:
Sep. 23, 2005
Applicant:
James Craig Smith, Farmington Hills, MI (US);
Inventor:
James Craig Smith, Farmington Hills, MI (US);
Assignee:
Delphi Technologies, Inc., Troy, MI (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H05B 1/02 (2006.01);
U.S. Cl.
CPC ...
Abstract
The resistance of an oxygen sensor heating element is estimated by modeling the effects of physical and electrical heating on the resistance of the heating element lead-in conductors, and subtracting the lead-in conductor resistance from a measure of the heating circuit resistance. The lead-in conductor resistance model is based on the temperature of the oxygen sensor boss and the current carried by the lead-in conductors. The heating element temperature is calculated from the determined heating element resistance and initial (cold-start) parameters of the heating circuit.