Injector nozzle spray hole with an aerated counterbore
AssigneeCummins Inc.
InventorsFrank Husmeier, Ross A. Phillips
Life of this patent
Estimating the term…
Abstract
Apparatuses, methods, and systems for fuel injection are disclosed. The apparatus includes an inner sac with at least one spray hole disposed on an inner surface of the apparatus, the at least one spray hole leading to a fuel passage extending therefrom, at least one counterbore extending partially between an outer surface of the apparatus and the sac along the fuel passage, and at least one air entrainment hole extending from the outer surface of the apparatus toward the at least one counterbore, the at least one air entrainment hole fluidly coupled with the at least one counterbore and configured to provide air to the fuel passage.
Claims20
An apparatus for fuel injection, comprising:
- an inner sac with at least one spray hole disposed on an inner surface of the apparatus, the at least one spray hole leading to a fuel passage longitudinally extending therefrom toward an outer surface of the apparatus;
- at least one counterbore extending partially between the outer surface of the apparatus and the sac and fluidly coupled with the sac via the fuel passage;
- at least one air entrainment hole extending from the outer surface of the apparatus toward the fuel passage;
- and
- at least one air passage with a first end and a second end, the at least one air passage fluidly coupling the at least one counterbore and the at least one air entrainment hole, wherein the at least one air passage extends from the first end at a corner of the at least one air entrainment hole where there is high pressure to the second end at a corner of the at least one counter bore where there is low pressure so that air is pulled through the at least one entrainment hole into the at least one counterbore.
A method of fuel injection in an engine, comprising:
- opening a fuel injecting apparatus in response to an operation signal from an engine control system;
- inserting fuel through a fuel passage and a counterbore formed in the fuel injection apparatus;
- redirecting air into the fuel passage through an air passage fluidly coupling the counterbore and at least one air entrainment hole and extending from a corner of the at least one air entrainment hole where there is high pressure to a corner of the counterbore where there is low pressure such that the air is pulled through the at least one entrainment hole in to the counterbore;
- and
- combusting a mixture of air and fuel inside the engine.
A method of manufacturing an apparatus having an inner sac for fuel supply and injection, comprising:
- forming at least one spray hole disposed on an inner surface of the apparatus and coupled with the inner sac;
- forming at least one counterbore extending partially between an outer surface of the apparatus and the sac and fluidly coupled with the sac via a fuel passage;
- forming at least one air entrainment hole extending from the outer surface of the apparatus toward the fuel passage;
- and
- forming at least one air passage with a first end and a second end, the at least one air passage fluidly coupling the at least one counterbore and the at least one air entrainment hole, wherein the at least one air passage extends from the first end at a corner of the at least one air entrainment hole where there is high pressure to the second end at a corner of the at least one counter bore where there is low pressure so that air is pulled through the at least one entrainment hole into the at least one counterbore.
Dependencies are inferred from the claim text.