F - Mech Eng,Light,Heat,Weapons – 02 – D
Patent
F - Mech Eng,Light,Heat,Weapons
02
D
F02D 41/00 (2006.01) F02D 41/14 (2006.01) F02D 41/30 (2006.01) F02D 41/32 (2006.01) F02M 69/46 (2006.01)
Patent
CA 2096510
A control circuit for variably modifying the rate of metered fuel flow to an engine by fuel injection apparatus having fuel injector means for supplying metered fuel to the engine in accordance with control signals provided in response to the speed of the engine and in response to the operating temperature of the engine and further in response to the position of a throttle valve variably positionable within an induction pasage leading to the engine, comprising oxygen sensor means for sensing exhaust gas from the engine and producing a signal in response thereto to indicate whether the fuel-air mixture supplied to the engine is too lean in terms of fuel or too rich in terms of fuel, and modifying circuit means for receiving the signal from the oxygen sensor means, the modifying circuit means upon receiving the signal from the oxygen sensor means indicating that a too lean fuel-air mixture is being supplied to the engine being effective to operate in a closed loop mode to modify the signal being produced by the throttle valve in order to thereby create a modified throttle valve position signal which apparently indicates that the throttle valve is opened to an extend further than actually opened, the modifying circuit means upon receiving the signal from the oxygen sensor means indicating that a too rich fuel-air mixture is being supplied to the engine also being effective to operate in a closed loop mode to modify the signal being produced by the throttle valve in order to thereby create a modified throttle valve position signal which apparently indicates that the throttle valve is opened to an extent less than actually opened.
Circuit de commande pour modification variable du débit mesuré de carburant envoyé à un dispositif à injection qui alimente un moteur conformément aux signaux de commande produits en réponse à la vitesse du moteur et à la température de fonctionnement, ainsi qu'à la position d'un papillon des gaz à position variable installé dans un passage à induction menant au moteur, comportant un dispositif capteur d'oxygène pour déceler les gaz d'échappement du moteur et produire un signal en réponse à la captation pour indiquer si le mélange carburant-air qui alimente le moteur est trop pauvre ou trop riche en carburant, et un dispositif de modification de circuit permettant la réception du signal du dispositif de captation d'oxygène; le dispositif de modification de circuit, sur réception du signal en provenance du dispositif de captation d'oxygène indiquant un mélange d'alimentation au moteur trop pauvre, passe en circuit fermé pour modifier le signal produit par le papillon des gaz afin de modifier le signal de position du papillon qui donne un signal indiquant que le papillon est ouvert plus qu'il ne l'est vraiment; le dispositif de modification de circuit, sur réception d'un signal du dispositif de captation d'oxygène indiquant qu'un mélange air-carburant trop riche est fourni au moteur passe aussi en mode circuit fermé pour modifier le signal produit par le papillon afin de créer un signal de position du papillon modifié pour produire un signal indiquant un papillon ouvert moins qu'il ne l'est vraiment.
Fetherstonhaugh & Co.
Holley Performance Products Inc.
LandOfFree
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