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US 11,879,418 B2Granted
Fuel injector and nozzle assembly having spray duct with center body for increased flame liftoff length
AssigneeCaterpillar Inc.
InventorsRussell P Fitzgerald, Glen Clifford Martin
Life of this patent
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Abstract
A fuel injector includes a nozzle body, and spray ducts coupled to the nozzle body and in spray path alignment with spray orifices therein. A nozzle check is movable within the nozzle body to open and close the spray orifices. Each of the spray ducts defines a duct center axis, and includes a center body forming, together with a duct inner surface, a spray jet passage circumferential of the duct center axis and reduced in area in a direction of spray jet advancement from the nozzle body.
Claims16
A fuel injector comprising:
- a nozzle body having a plurality of spray orifices formed therein;
- a plurality of spray ducts coupled to the nozzle body and in spray path alignment with the plurality of spray orifices;
- a nozzle check movable within the nozzle body between an open position, and a closed position blocking the plurality of spray orifices;
- and
- each of the plurality of spray ducts defining a duct center axis, and including a duct inner surface, and a center body forming, together with the duct inner surface, a spray jet passage extending circumferentially around the duct center axis and reduced in area in a direction of spray jet advancement from the nozzle body.
2 more elements
A fuel injector nozzle assembly comprising:
- a nozzle body defining a nozzle center axis and including an inner nozzle surface, an outer nozzle surface, and a spray orifice extending from the inner nozzle surface to the outer nozzle surface and oriented angularly to the nozzle center axis;
- a spray duct coupled to the nozzle body in spray path alignment with the spray orifice;
- the spray duct including a duct wall extending between a duct inlet and a duct outlet, and a center body coupled to the duct wall and positioned in a spray jet path extending between the duct inlet and the outlet;
- and
- a spray jet passage is defined peripherally between the duct wall and the center body.
2 more elements
Dependencies are inferred from the claim text.