Injecteur de combustible ayant un jet de pulverisation de combustible d'un diametre moyen sauter reduit par un disque d'orifice de dosage et procedes correspondants

Fuel injector with reduced sauter-mean-diameter fuel atomization spray by fluidic metering orifice disc and methods

Abstract

L'invention concerne un injecteur de combustible (100). Cet injecteur de combustible (100) comprend une entrée (100A), une sortie (100B), un siège (128 ou 1000), un élément de fermeture (112B) et un disque d'orifice de dosage (10, 200, 300, 300', 400, 500, 600, 700, 900). Le disque d'orifice de dosage (10, 200, 300, 300', 400, 500, 600, 700, 900) est situé entre le siège (128 ou 1000) et la sortie (100B). Le disque d'orifice de dosage (10, 200, 300, 300', 400, 500, 600, 700, 900) comprend une pluralité d'orifices de dosage (12 et 13) disposés autour de l'axe longitudinal et un canal d'écoulement (14A, 14B, 15A, 15B) aboutissant à chaque disque d'orifice de dosage (10, 200, 300, 300', 400, 500, 600, 700, 900) de telle manière que, lorsque l'entrée (100A) de l'injecteur de combustible (100) est pourvue d'un fluide sous une pression de l'ordre de 300 kiloPascals à 400 kiloPascals, le disque d'orifice de dosage (10, 200, 300, 300', 400, 500, 600, 700, 900) fournit un fluide atomisé d'un diamètre moyen Sauter inférieur à 70 microns à proximité de la sortie (100B) de l'injecteur de combustible (100). L'invention concerne également divers injecteurs de combustible et configurations de disques ainsi que différents procédés d'atomisation et de ciblage de pulvérisation.
A fuel injector (100) is shown and described. The fuel injector (100) includes an inlet (100A), outlet (100B), seat (128 or 1000), closure member (112B), and a metering orifice disc (10, 200, 300, 300', 400, 500, 600, 700, 900). The metering orifice disc (10, 200, 300, 300', 400, 500, 600, 700, 900) is disposed between the seat (128 or 1000) and the outlet (100B). The metering orifice disc (10, 200, 300, 300', 400, 500, 600, 700, 900) includes a plurality of metering orifices (12 and 13) disposed about the longitudinal axis and a flow channel (14A, 14B, 15A, 15B) to each metering orifice disc (10, 200, 300, 300', 400, 500, 600, 700, 900) so that, when the inlet (100A) of the fuel injector (100) is provided with a pressurized fluid over a range of pressure from 300 kiloPascals to 400 kiloPascals, the metering orifice disc (10, 200, 300, 300', 400, 500, 600, 700, 900) provides an atomized fluid having a Sauter-Mean-Diameter of less than 70 microns proximate the outlet (100B) of the fuel injector (100). Various fuel injectors and disc configurations are disclosed. Various methods of atomizing and spray targeting are also provided.

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