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:
Mar. 11, 1997
Filed:
Mar. 24, 1995
Kazuhiro Shinmoto, Hiroshima, JP;
Mazda Motor Corporation, Hiroshima-ken, JP;
Abstract
A failure detection system for an air-to-fuel ratio control system executes an air-to-fuel ratio feedback control based on a first output from a first air-to-fuel ratio sensor before a catalytic converter. The system detects a feedback correction value, corrected according to a second output from a second air-to-fuel ratio sensor after the catalytic converter, which is above a predetermined value so as to determine that the first air-to-fuel ratio sensor has something wrong with it. The system also detects a change in the second output during correction of the feedback correction value so as to determine that the second air-to-fuel ratio sensor has something wrong with it when a change which is less than a predetermined change is detected.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile