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. 29, 1998
Filed:
Sep. 17, 1996
Applicant:
Inventor:
Takayuki Anamoto, Iwata, JP;
Assignee:
Yamaha Hatsudoki Kabushiki Kaisha, Shizuoka-ken, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F02D / ;
U.S. Cl.
CPC ...
123674 ;
Abstract
A feedback control system and method for operating an internal combustion engine to provide the desired air/fuel ratio under all running conditions. The feedback control operates when the engine is operating at a mid-range rotational velocity and throttle position and when the air/fuel ratio is between about 15 and 16 to 1 to modify the fuel/air ratio from that achieved by a basic setting that is derived from parameters of engine performance so as to maintain the desired ratio. The basic setting is updated based upon previous feedback control corrections in order to minimize the amount of corrections required and reduce hunting.