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. 05, 1979
Filed:
Aug. 18, 1977
Applicant:
Inventor:
John W Riddel, Fenton, MI (US);
Assignee:
General Motors Corporation, Detroit, MI (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01N / ;
U.S. Cl.
CPC ...
204 / ; 2041 / ; 1231 / ;
Abstract
A durable and relatively inexpensive air/fuel ratio sensor for detecting oxygen concentration in exhaust gases of internal combustion engines, that does not require a separate reference atmosphere. A body of stabilized zirconium dioxide with two opposite major faces serves as a solid oxygen ion electrolyte. A catalytic electrode is on one of the faces, while a noncatalytic electrode is on the other face. The body is mounted in an exhaust pipe so that both of the electrodes are exposed to the exhaust gases.