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. 19, 2002
Filed:
Apr. 03, 2000
NGK Spark Plug Co., Ltd., Aichi, JP;
Abstract
A high temperature sensor allowing for accurate measurement including wires running through an oxygen ion conductor and connecting to electrodes sandwiching an oxygen ion conductor substrate having an electrical resistance far smaller than the combined resistance (Rpvs) appearing across the lead wires, where Rpvs is determined by way of a pulse voltage sensing method applied across the electrodes. In the case of a two cavity sensor for NOx measurement, Rpvs is not less than 2.6 times greater, or more preferably 4 times greater than the resistance of the wires. In another embodiment, a common internal oxygen reference source cavity is formed inside the oxygen ion conductor so as to provide the same oxygen partial pressure base for other cavities.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile