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. 14, 2018
Filed:
Oct. 24, 2016
Ngk Spark Plug Co., Ltd., Nagoya-shi, Aichi, JP;
Kaoru Hisada, Obu, JP;
Katsunori Yazawa, Kasugai, JP;
NGK SPARK PLUG CO., LTD., Aichi, JP;
Abstract
A particulate measurement system () includes an auxiliary electrode current measurement circuit (), which can determine whether or not an auxiliary electrode current Ihas flowed to a second wiring line () as well as its magnitude. When a particulate sensor () is operating normally, since a second electrode () and a casing CS are electrically insulated from each other, no current flows to the second wiring line (). However, when the second electrode () and the casing CS are electrically shorted by soot or the like, the auxiliary electrode current Iflows to the second wiring line (). Therefore, by providing the auxiliary electrode current measurement circuit (), the particulate measurement system () can determine the state of adhesion of particulates, etc., in the particulate sensor (), and can determine whether or not the particulate measurement system () is in an anomalous state.