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. 01, 2017
Filed:
Jul. 07, 2014
Ngk Spark Plug Co., Ltd., Nagoya-shi, Aichi, JP;
NGK SPARK PLUG CO., LTD., Aichi, JP;
Abstract
A particulate detection system () for detecting the quantity of particulates S in a gas under measurement EG, including a detection section (), a drive circuit (), and a control section (). The detection section () has an ion source () and a particulate electrification section (). The drive circuit () includes an ion source drive circuit () for performing constant current control. The control section () includes current convergence determination means S-S, S-S, and detection start means Sfor starting detection of the quantity of the particulates S using the signal Is, detected by a detection circuit (), after the gaseous discharge current Id has converged to an allowable range IR.