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. 16, 2018
Filed:
Mar. 26, 2015
Denso Corporation, Kariya, Aichi-pref., JP;
Shinya Uemura, Obu, JP;
DENSO CORPORATION, Kariya, JP;
Abstract
In an impedance detector, a current application portion applies a first current and a second current, directions of which are opposite to each other, to an element of an oxygen concentration sensor. A detection portion detects a difference between a current application prior voltage and a current application subsequent voltage. The current application prior voltage is a voltage between both of ends of the element before being applied with the first current, and the current application subsequent voltage is a voltage between both of the ends of the element when being applied with the first current. An impedance calculation portion calculates an impedance of the element based on the difference detected by the detection portion and a value of the first current. The current application portion is configured to change a current application time to apply the first current and the second current according to a command provided thereto.