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US 6,886,762 B2Granted
Nozzle insert for dual mode fuel injector
AssigneeCaterpillar Inc.
InventorsJoseph Angelino, Scott F. Shafer, Charles Bates, Jay E. Tomaseski, Clifford E. Cotton, III, Alan R. Stockner, Colby Buckman
Life of this patent
Estimating the term…
Abstract
A nozzle insert that is capable of being irreversibly attached to a needle valve tube such that the resulting needle valve member can be used in a nested needle valve configuration for a dual mode fuel injector.
Claims19
A needle valve member for a fuel injector comprising:
- a nozzle insert having an external valve surface, an internal valve seat and at least one nozzle outlet;
- a tube irreversibly attached to said nozzle insert;
- said nozzle insert includes a cylindrical male mating surface;
- and
- said tube having a cylindrical female mating surface mated to said cylindrical male mating surface of said nozzle insert.
2 more elements
A needle valve member for a fuel injector comprising:
- a nozzle insert having an external valve surface, an internal valve seat and at least one nozzle outlet;
- a tube irreversibly attached to said nozzle insert;
- said tube includes an external surface with a first diameter adjacent said nozzle insert and a second diameter away from said nozzle insert;
- and
- said first diameter is smaller than said second diameter, and said first diameter is separated from said second diameter by an opening hydraulic surface.
2 more elements
A needle valve member for a fuel injector comprising:
- a nozzle insert having an external valve surface, an internal valve seat and at least one nozzle outlet;
- a tube irreversibly attached to said nozzle insert;
- and
- said at least one nozzle outlet includes a plurality of nozzle outlets that are oriented into at least one of a non-impinging spray pattern and an impinging spray pattern.
1 more element
A needle valve member for a fuel injector comprising:
- a nozzle insert having an external valve surface, an internal valve seat and at least one nozzle outlet;
- a tube irreversibly attached to said nozzle insert;
- and
- said nozzle insert has a circumferential side surface that includes said external valve surface positioned between a guide cylindrical surface and a mating cylindrical surface.
1 more element
A fuel injector comprising:
- an injector body defining a plurality of second nozzle outlets and including a valve seat;
- a needle valve member comprising a nozzle insert having an external valve surface for contacting and closing said valve seat, an internal valve seat for receiving a valve member, and at least one nozzle outlet, and including a tube irreversibly attached to said nozzle insert
- the needle valve member being at least partially positioned in said injector body and being movable as a unit between a first position out of contact with said valve seat of said injector body in which said second nozzle outlets are open, and a second position in contact with said valve seat of said injector body in which said second nozzle outlets are closed.
Dependencies are inferred from the claim text.