Fuel injection valve and method for co-injecting a liquid...

F - Mech Eng,Light,Heat,Weapons – 02 – M

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F02M 43/04 (2006.01) F02M 21/02 (2006.01)

Patent

CA 2633846

A fuel injection valve is provided for co-injecting a liquid and a gaseous fuel into the combustion chamber of an internal combustion engine. A solid needle regulates the injection of liquid and gaseous fuels from a cavity in the fuel injection valve into the combustion chamber when the needle is lifted to its open position. In preferred embodiments, liquid fuel is metered and pressurized in an intensifier's cylinder provided within the valve body and the liquid fuel is delivered through a restricted flow passage into the cavity where it mixes with the gaseous fuel. The restricted flow passage can be formed by a small passage formed in the valve body or an annular passage between the needle and the valve body.

Une soupape d'injection de carburant est prévue pour la co-injection d'un liquide et d'un carburant gazeux dans le foyer d'un moteur à combustion interne. Une aiguille rigide régule l'injection de combustibles liquides et gazeux à partir d'une cavité dans la soupape d'injection de carburant à l'intérieur de la chambre de combustion lorsque l'aiguille est levée à sa position ouverte. Dans les réalisations préférées, le combustible liquide est dosé et pressurisé dans le cylindre d'un multiplicateur de pression, fourni dans le corps de la soupape et le combustible liquide est livré par un passage d'écoulement restreint dans la cavité où il se mélange avec le combustible gazeux. Le passage d'écoulement restreint peut être formé par un petit passage formé dans le corps de la soupape ou par un passage annulaire situé entre l'aiguille et le corps de la soupape.

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