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. 10, 2012
Filed:
Feb. 19, 2009
Satoshi Hada, Inazawa, JP;
Katsuhide Akimoto, Nishio, JP;
Shoichiro Emmei, Nagoya, JP;
Keigo Mizutani, Okazaki, JP;
Shinya Teranishi, Kariya, JP;
Satoshi Hada, Inazawa, JP;
Katsuhide Akimoto, Nishio, JP;
Shoichiro Emmei, Nagoya, JP;
Keigo Mizutani, Okazaki, JP;
Shinya Teranishi, Kariya, JP;
Denso Corporation, Kariya, JP;
Abstract
A gas sensor control device is disclosed as including a sensor cell having a negative terminal, to which a current-voltage converter is connected, and a differential amplifier is connected to the current-voltage converter to provide a current measured result applied to a microcomputer. The current-voltage converter has an opposite-to-sensor terminal to which another differential amplifier is connected. A sensor-side terminal of the current-voltage converter and another differential amplifier is electrically connected to each other via an electric pathway having a sensor-current flow disabling pathway in which a switch circuit is provided. Closing the switch circuit allows a potential difference between both terminals of the current-voltage converter is zeroed. With the switch circuit closed, the microcomputer calculates an element current correcting value, while detecting an electromotive force of the sensor cell based on which a failure is determined.