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:
Mar. 25, 2014
Filed:
Nov. 16, 2009
Yoshinori Inoue, Nagoya, JP;
Norikazu Ieda, Ichinomiya, JP;
Yoshinori Inoue, Nagoya, JP;
Norikazu Ieda, Ichinomiya, JP;
NGK Spark Plug Co., Ltd., Aichi, JP;
Abstract
A gas sensor system including a gas sensor; a current control unit; a constant control unit; and a temperature acquisition unit. The gas sensor includes a measurement chamber, a pump cell and an electromotive force cell. The current control unit performs feedback control on current flowing through the pump cell in response to the voltage of the electromotive force cell and in accordance with a control constant which characterizes the feedback control. Further, the constant control unit changes the control constant of the feedback control in accordance with a value (for example, a resistance value of the electromotive force cell) corresponding to the temperature of the gas sensor.