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:
Nov. 15, 2016
Filed:
Jul. 01, 2011
Hiroyuki Tsukada, Iwakura, JP;
Norikazu Ieda, Ichinomiya, JP;
Hiroyuki Tsukada, Iwakura, JP;
Norikazu Ieda, Ichinomiya, JP;
NGK SPARK PLUG CO., LTD., Aichi, JP;
Abstract
A gas sensor control apparatus () includes a gas sensor () having an oxygen pump cell (); a sensor drive circuit () which energizes the gas sensor; terminal voltage output means () which detects and outputs a terminal voltage of the oxygen pump cell; anomaly detection means () which compares the terminal voltage and a first threshold value, and when the terminal voltage exceeds the first threshold value, outputs a short circuit anomaly signal informing of a short circuit; a controller () which compares the terminal voltage and a second threshold value less than the first threshold value, and when the terminal voltage exceeds the second threshold value, generates a cell voltage anomaly signal informing of an application of an overvoltage to the oxygen pump cell; and command means () which, when receiving the short circuit anomaly signal or cell voltage anomaly signal, outputs a de-energization command.