Injector nozzle spray hole with an aerated counterbore
AssigneesCummins Inc., Scania CV AB
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 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 comprising a corner fluidly coupled with the at least one counterbore and configured to provide air to the fuel passage such that the air is at higher pressure in the corner than in 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 a corner of at least one air entrainment hole that is fluidly coupled with the counterbore such that the air is at higher pressure in the corner than in 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 along the fuel passage;
- and
- forming at least one air entrainment hole extending from the outer surface of the apparatus toward the at least one counterbore such that a corner of the at least one air entrainment hole is fluidly coupled with the at least one counterbore and is configured to provide air to the fuel passage such that the air is at higher pressure in the corner than in the at least one counterbore.
Dependencies are inferred from the claim text.