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:
Sep. 12, 1989
Filed:
Aug. 16, 1988
Yoshihiko Miyachi, Hachiohji, JP;
Fuji Jukogyo Kabushiki Kaisha, Tokyo, JP;
Abstract
An air-fuel ratio control system for idling operation of an automotive engine has an O.sub.2 -sensor for detecting oxygen concentration of exhaust gas and for producing a feedback signal, a feedback control system responsive to the feedback signal for controlling air-fuel ratio to a desired air-fuel ratio. An idle switch is provided for detecting idling operation of the engine and for producing an idle signal. A lookup table stores a learning coefficient for controlling an actual injection pulse width during idling of the engine. In response to the idle signal the learning coefficient in the lookup table is updated with a new learning coefficient. When a predetermined learning operation is completed, the operation of the feedback control system is interrupted.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile