Patent ID: 7909271

Claim:
A direct injection fuel injector nozzle tip, comprising: an outer nozzle tip surface portion; an inner nozzle tip surface portion; a plurality of passages allowing fluid communication between the inner nozzle tip surface portion and the outer nozzle tip surface portion and directly into a combustion chamber of an internal combustion engine, each of the plurality of passages having an inner surface aperture on the inner nozzle tip surface portion and an outer surface aperture on the outer nozzle tip surface portion, each of the plurality of passages extending at an angle relative to an associated common plane, wherein the angle of each passage formed in the nozzle tip is approximately 27.5° or greater, and in which no passage is formed in the nozzle tip having an angle of less than approximately 27.5°; a first group of said passages having inner surface apertures located substantially in a first common plane; a second group of said passages having inner surface apertures located substantially in a second common plane substantially parallel to the first common plane; and a third group of said passages having inner surface apertures located substantially in a third common plane substantially parallel to the first and second common planes, the first group of passages each have a longitudinal axis extending at an acute angle alpha (α) of approximately 55 degrees or greater from the first common plane, the acute angles alpha (α) being measured in a plane perpendicular to the first common plane, the second group of passages each have a longitudinal axis extending at an acute angle theta (θ) of approximately 27.5 degrees or greater from the second common plane, the acute angles theta (θ) being measured in a plane perpendicular to the second common plane, and the third group of passages each have a longitudinal axis extending at an acute angle beta (β) of approximately 27.5 degrees or greater from the third common plane, the acute angles beta (β) being measured in a plane perpendicular to the third common plane.