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:
May. 26, 1998
Filed:
Dec. 11, 1996
Yoshihiko Kato, Susono, JP;
Toyota Jidosha Kabushiki Kaisha, Aichi, JP;
Abstract
An apparatus for determining whether or not an air-fuel ratio sensor, which is arranged in an exhaust system of an internal combustion engine to detect the air-fuel ratio of exhaust gas, is activated. The apparatus has a heater for heating the air-fuel ratio sensor, a detector for detecting whether or not the air-fuel ratio sensor has reached a half-activated state to start changing the output thereof after the start of the engine, a unit for integrating power supplied to the heater from the start of the engine until the air-fuel ratio sensor reaches the half-activated state, a unit for estimating, according to the integrated power, the power to be supplied to the heater to bring the air-fuel ratio sensor to a full-activated state, and a unit for determining that the air-fuel ratio sensor is in the full-activated state once the estimated power has completely been supplied to the heater.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile