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:
Apr. 12, 2016
Filed:
Nov. 14, 2013
Ngk Spark Plug Co., Ltd., Nagoya, Aichi, JP;
NGK SPARK PLUG CO., LTD., Nagoya, JP;
Abstract
An NOdetection apparatus does not always perform correction processing, but it determines whether to perform the correction processing on the basis of the result of a determination of whether a first Noconcentration is higher than a predetermined specific concentration. The first NOconcentration NOcalculated from a second pumping current Ipwhich changes with the actual NOconcentration. Therefore, the NOdetection apparatus can determine whether to correct the first NOconcentration NOin accordance with the actual NOconcentration. Accordingly, the NOdetection apparatus can suppress a decrease in gas detection accuracy even in the case where the gas detection value based on the sensor output involves an error in a specific concentration range (concentration range of 90 ppm or higher).