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:
Feb. 25, 2014
Filed:
Dec. 01, 2005
Da Yu Wang, Troy, MI (US);
Walter Thomas Symons, Grand Blanc, MI (US);
Robert Jerome Farhat, Grosse PTE Park, MI (US);
John E. Kirwan, Troy, MI (US);
Joachim Kupe, Davisburg, MI (US);
Kenneth D. Mowery, Noblesville, IN (US);
Da Yu Wang, Troy, MI (US);
Walter Thomas Symons, Grand Blanc, MI (US);
Robert Jerome Farhat, Grosse PTE Park, MI (US);
John E. Kirwan, Troy, MI (US);
Joachim Kupe, Davisburg, MI (US);
Kenneth D. Mowery, Noblesville, IN (US);
Delphi Technologies, Inc., Troy, MI (US);
Abstract
A sensor includes an oxygen pump cell; an oxygen pump chamber; an emf cell; a reference chamber providing a fluid connection to the reference gas; gas channels in fluid communication with the pump and emf electrodes, the reference gas comprising reformate produced by a fuel reformer fueled by an air-fuel gas mixture having an air-fuel ratio; a reformer electronic control module; a sensor electronic control module; a heater; a temperature sensor disposed in communication with the heater and the sensor control module for maintaining the sensor at a desired operating temperature; a closed loop controlled operation amplifier in electrical communication with the sensor, whereby the oxygen pump cell provides sufficient oxygen ions to oxidize an incoming diffusion-limiting fuel flux to the emf cell and maintain a constant emf at the emf cell, and wherein a current value represents an equivalent to the air-fuel ratio of the air-fuel gas mixture.