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:
Oct. 09, 2018
Filed:
Oct. 24, 2016
Ngk Spark Plug Co., Ltd., Nagoya-shi, Aichi, JP;
Kaoru Hisada, Obu, JP;
Toshio Nakanishi, Aichi, JP;
Yuichi Goto, Konan, JP;
Katsunori Yazawa, Kasugai, JP;
NGK SPARK PLUG CO., LTD., Aichi, JP;
Abstract
A particulate measurement apparatus controls a particulate sensor which includes an ion generation section (), an exhaust gas electrification section (), an ion trapping section (), and a second electrode (). The second electrode () is maintained at a potential repulses the ions to assist the trapping of the ions at the ion trapping section (). The particulate measurement apparatus includes a second isolation transformer (b) and an auxiliary electrode current measurement circuit (). The second isolation transformer (b) applies a voltage to the second electrode () through a second wiring line (). The auxiliary electrode current measurement circuit () detects an auxiliary electrode current Iflowing to the second wiring line (). The particulate measurement apparatus determines at least one of the state of the particulate sensor and the state of the second wiring line () based on the auxiliary electrode current I.