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:
Jan. 25, 2011
Filed:
Jun. 03, 2008
Osamu Nakasone, Frankfurt am Main, DE;
Yuichi Sasaki, Nagoya, JP;
Osamu Nakasone, Frankfurt am Main, DE;
Yuichi Sasaki, Nagoya, JP;
NGK Insulators, Ltd., Nagoya, JP;
Abstract
A method of correcting an output of a NOx sensor including: a first step of obtaining a sensor-variation relational expression based on a relationship between an Ip/Ipvalue and an output change percentage for a calibration sensor; a second step of obtaining, from the relational expression, an output change percentage β that corresponds to an Ip/Ipvalue of a subject NOx sensor; a third step of calculating a pressure correction coefficient α based on the obtained β; and a fourth step of performing output correction on the subject NOx sensor by calculating the pumping current Ip(p) under a reference pressure based on the pumping current Ip(p) and a pressure p of the measurement gas which are detected upon measurement of the NOx concentration in the measurement gas.