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. 14, 2020
Filed:
Oct. 23, 2017
Ngk Spark Plug Co., Ltd., Nagoya, JP;
Yoshihiro Nakano, Komaki, JP;
NGK Spark Plug Co., LTD., Nagoya, JP;
Abstract
A microcomputer acquires first and second NHelectromotive forces from a first NHdetection section and a second NHdetection section, and computes a NHconcentration, which is the concentration of NHcontained in exhaust gas. The first and second NHdetection sections output the first and second NHelectromotive forces which vary with both the concentrations of NHand a flammable gas contained in the exhaust gas. The microcomputer acquires a second pumping current from an NOx detection section and computes an NOx concentration, which is the concentration of NOx contained in the exhaust gas. The NOx detection section outputs the second pumping current which varies with the concentration of NOx and the concentration of NH. The microcomputer determines whether or not the exhaust gas contains the flammable gas based on at least the first and second NHelectromotive forces and the second pumping current.