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. 31, 2017
Filed:
Mar. 26, 2014
Ngk Spark Plug Co., Ltd., Nagoya-shi, Aichi-ken, JP;
Tomonori Uemura, Komaki, JP;
NGK SPARK PLUG CO., LTD., Aichi, JP;
Abstract
A sensor temperature control apparatus () includes switching device (); energization control means Sand Sfor controlling duty ratio DT to maintain sensor element section () at a target temperature; storage means () for storing a first duty ratio DTin advance; element temperature judgment means Sfor determining whether the temperature of the sensor element section falls within a first temperature range including the target temperature; and semi-shorted state detection means Sto Sfor comparing a present duty ratio DTwith the first duty ratio in a state in which the temperature of the sensor element section falls within the first temperature range, to thereby determine whether a semi-shorted first temperature range state has arisen in which only a portion of the current flowing through switching device flows through heater section () and the temperature of the sensor element section falls within the first temperature range.