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:
Dec. 25, 2018
Filed:
Aug. 11, 2017
Denso Corporation, Kariya, Aichi-pref., JP;
Satoshi Nishimoto, Kariya, JP;
DENSO CORPORATION, Kariya, JP;
Abstract
An air-fuel ratio sensor control unit connected with an air-fuel ratio sensor including a common terminal, a first terminal and a second terminal includes a common connection terminal connected with the common terminal, a first connection terminal connected with the first terminal, a second connection terminal connected with the second terminal, a voltage control circuit controlling a voltage of the first connection terminal, a resistor connected with the common connection terminal, a voltage sensing circuit sensing a two-end voltage of the resistor, a current applying circuit applying a constant current to the second connection terminal, and a determining unit sensing a change quantity of the two-end voltage by using the voltage sensing circuit and determining whether a disconnection failure of the first connection terminal occurs based on a sensing result of the change quantity.