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US 10,480,473 B2Granted
Fuel injector
AssigneeFord Global Technologies, LLC
InventorsXiaogang Zhang, Mark Meinhart, Jianwen James Yi, George Papaioannou
Life of this patent
Estimating the term…
Abstract
A fuel injector and method are disclosed including an injector body with a fuel sac, and an end positioned into a combustion chamber. A main fuel passage, having a varying cross-sectional area forming a reduced pressure region, fluidically couples the fuel sac to the combustion chamber. One or more additional passages fluidically couple the reduced pressure region with one or both of the fuel sac and the combustion chamber.
Claims19
A fuel injector comprising:
- an injector body;
- an end of the injector body configured to be positioned into a combustion chamber;
- a fuel sac defined within the injector body;
- a main fuel passage to fluidically couple the fuel sac to the combustion chamber, and having a varying cross-sectional area to form a reduced pressure region;
- a dome shaped wall disposed over an outlet of the main fuel passage having two or more apertures to allow fuel to pass from the main fuel passage into the combustion chamber;
- and
- an additional passage fluidically coupling the reduced pressure region with one of the fuel sac and the combustion chamber.
4 more elements
A fuel injector comprising:
- an injector body;
- a fuel sac defined inside the injector body;
- an injector needle disposed for movement within the injector body to pressurize fuel within the fuel sac;
- one or more venturi shaped nozzle passages from the fuel sac to an outside end of the injector body including a throat region between a nozzle inlet and a nozzle outlet at the outside end;
- a wall extending over the nozzle outlet, the wall having two or more spaced apart apertures to allow fuel to pass through the wall;
- and
- one or more flow joining passages fluidically coupling the throat region to one or both of the fuel sac and a side of the nozzle outlet.
4 more elements
A fuel injector comprising:
- an internal cavity to receive fuel and to hold a quantity of fuel for pressurization;
- an injection passage through which pressurized fuel is passable from the internal cavity into a combustion chamber, the injection passage having a constricted portion to form a low pressure region in the injection passage;
- and
- a flow joining passage fluidically coupling the constricted portion with the internal cavity, wherein the flow joining passage is a first flow joining passage and further comprising a second flow joining passage, wherein the pressurized fuel flows through the injection passage as a main flow, and some fuel passes from the internal cavity through the first flow joining passage to join the main flow at the low pressure region, and some gas from the combustion chamber passes through the second flow joining passage to join the main flow at the low pressure region to mix with the main flow.
1 more element
Dependencies are inferred from the claim text.