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:
Jun. 15, 1999
Filed:
Aug. 26, 1997
Akira Kato, Wako, JP;
Hiroki Munakata, Wako, JP;
Honda Giken Kogyo Kabushiki Kaisha, Tokyo, JP;
Abstract
An air-fuel ratio control system for an internal combustion has a plurality of cylinders and an exhaust system. The air-fuel ratio of exhaust gases emitted from the cylinders is detected by an air-fuel ratio sensor arranged in the exhaust system. The air-fuel ratio of a mixture supplied to each of the cylinders is estimated based on an output from the air-fuel ratio sensor by using an observer for observing an internal operative state of the exhaust system by means of a model representative of a behavior of the exhaust system. Feedback control of an amount of fuel to be supplied to the each of the cylinders is carried out in response to the output from the air-fuel ratio sensor by using a controller of a recurrence formula type, such that the air-fuel ratio of the mixture supplied to the each of the cylinders is converged to a desired value. The controller of the recurrence formula type adjusts adaptive parameters for use in the feedback control, for the each of the cylinders based on the estimated air-fuel ratio.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile