Fuel injector with controlled high pressure fuel passage

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

Patent

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Details

F02M 59/10 (2006.01) F02M 45/04 (2006.01) F02M 47/02 (2006.01) F02M 57/02 (2006.01) F02M 59/46 (2006.01) F02M 63/00 (2006.01) F02M 63/02 (2006.01)

Patent

CA 2466741

A unit fuel injector (50), the injector (50) internally preparing fuel during an injection event at a pressure sufficient for injection by means of an intensifier (84) driven by a pressurized non-fuel actuating fluid selectively ported to the intensifier (84), includes a selectively actuatable controller (300) interposed in a fuel passage (74), the fuel passage (74) effecting fluid communication between an intensifier fuel chamber and a needle valve (78), the controller (300) being shiftable between an open and a closed disposition for selectively opening and closing the fuel passage (74) during the injection event.

L'invention concerne une unité injecteur de carburant (50), cet injecteur préparant de manière interne le carburant lors d'une injection à une pression suffisante pour réaliser l'injection au moyen d'un intensificateur (84) entraîné par un fluide d'activation non-combustible pressurisé, acheminé de manière sélective vers ledit intensificateur (84). L'injecteur selon l'invention comprend une unité de commande (300) pouvant être activée de manière sélective, cette unité de commande étant disposée à l'intérieur d'un passage de carburant (74) établissant une communication fluidique entre une chambre à combustible d'intensificateur et une soupape à pointeau (78), l'unité de commande (300) pouvant être déplacée entre une position ouverte et une position fermée, de sorte à ouvrir et à fermer de manière sélective le passage de carburant (74) pendant l'injection.

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