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:
Aug. 11, 2020
Filed:
Jul. 27, 2017
Denso Corporation, Kariya, Aichi-pref., JP;
Shinya Uemura, Kariya, JP;
DENSO CORPORATION, Kariya, JP;
Abstract
An air-fuel ratio sensor control apparatus comprises a voltage control part configured to control a voltage Voapplied to a cell of an air-fuel ratio sensor in accordance with a sensor current flowing in the cell and a current detection part configured to detect the sensor current as a physical value, which indicates the air-fuel ratio. In the air-fuel ratio sensor control apparatus, a voltage varying time point, at which the voltage control part varies the voltage Vo, and a current detecting time point, at which the current detection part detects the current, are shifted from each other. A time period Ta from the current detecting time point, which is immediately before the voltage varying time point, to the voltage varying time point and a time period Tb from the voltage varying time point to the current detecting time period, which is immediately after the voltage varying time point, are set to satisfy Ta<Tb.