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:
Dec. 09, 2014
Filed:
Feb. 03, 2012
Hisashi Sasaki, Konan, JP;
Hisashi Sasaki, Konan, JP;
NGK Spark Plug Co., Ltd., Aichi, JP;
Abstract
In a NOx sensor control apparatus (), a NOx sensor includes a heater (), and an oxygen concentration detection cell (), a first pumping cell () and a second pumping cell () which are arranged sequentially in the axis O direction. The NOx sensor control apparatusincludes a first impedance detection means () which detects the first impedance of the first cell (oxygen concentration detection cell), a heater control means () which performs an energization control of a heater such that the first impedance becomes a target value, a second impedance detection means () which detects the second impedance of the second cell (second pumping cell), and an output correction means () which corrects an output of at least the third cell (first pumping cell) based on the deviation between the first impedance and the second impedance.