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:
Aug. 07, 2007
Filed:
Jun. 27, 2003
Yoshinori Inoue, Komaki, JP;
Shinji Kumazawa, Iwakura, JP;
Akihiro Kobayashi, Aichi, JP;
NGK Spark Plug Co., Ltd., Aichi, JP;
Abstract
NOx sensor element of oxygen-ion conductive solid electrolyte body; flow passage () provided within the body for introducing analyte gas; oxygen partial pressure detection cell; first oxygen pump cellfor controlling oxygen partial pressure of the gas in the flow passage; and nitrogen oxides detection cellfor decomposing nitrogen oxides in the gas having a controlled oxygen partial pressure and for causing dissociated oxygen to migrate through the solid electrolyte body (see FIG.). Operational amplifieris connected between the nitrogen oxides detection celland a 12 V battery power source to generate a voltage applied to the nitrogen oxides detection cell; and diodeconnected to a point between the operational amplifierand the nitrogen oxides detection cell. The diode clamps the voltage to an activation voltage higher than the measurement voltage during activation.