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. 21, 1999
Filed:
Oct. 14, 1997
Applicant:
Inventors:
Masashi Yamaguchi, Iwata, JP;
Yoko Fujime, Iwata, JP;
Assignee:
Yamaha Hatsudoki Kabushiki Kaisha, Shizuoka-ken, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F02D / ;
U.S. Cl.
CPC ...
701106 ; 701104 ; 701109 ; 123480 ; 123675 ;
Abstract
An engine control system includes an inverse model which includes a forward model and a feedback loop, wherein an actuating parameter, such as the quantity of fuel injected from a fuel injector, outputted from the forward model is used as a controlled variable, such as the air-fuel ratio in an exhaust system, inputted into the inverse model through the feedback loop. The forward model has preferably a learning function using condition-indicating factors such as engine speed and throttle angle. Accuracy of the inverse model is improved and appropriate engine control can be realized even during a transient state of the engine.