F - Mech Eng,Light,Heat,Weapons – 02 – D
Patent
F - Mech Eng,Light,Heat,Weapons
02
D
F02D 41/24 (2006.01) B63H 21/21 (2006.01) F02D 28/00 (2006.01) F02D 41/30 (2006.01) F02D 43/04 (2006.01)
Patent
CA 2536891
In an air/fuel ratio control system for an outboard motor engine, a learned correction coefficient KTIMn used in open-loop control for correcting a basic fuel injection amount to be supplied to the engine, is updated only when the manifold absolute pressure PBA (indicative of engine load) is within a predetermined range relative to the engine speed NE concerned. As a result, the air/fuel ratio can be accurately controlled to one other than the stoichiometric air/fuel ratio, even when an O2 sensor that produces an output whose property only changes near the stoichiometeic air/fuel ratio is used.
Système de contrôle du rapport air-carburant d'un moteur hors-bord comprenant un coefficient de correction appris (KTIM), utilisé par un dispositif de commande en boucle ouverte pour corriger la quantité de carburant à injecter dans le moteur, qui n'est actualisé que lorsque la pression absolue de la tubulure d'admission (PBA) (révélatrice de la charge du moteur) se situe dans une plage déterminée relativement au régime du moteur (NE). Le rapport air/carburant se règle ainsi avec précision sans se limiter au rapport air/carburant stochiométrique, même lorsqu'est utilisé un capteur d'oxygène qui produit un signal modifié uniquement lorsque le rapport air/carburant stochiométrique est presque atteint.
Miyauchi Tomohiro
Sato Kazuhiro
Goudreau Gage Dubuc
Honda Motor Co. Ltd.
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