FUEL INJECTORS FOR EXHAUST HEATERS
First Claim
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1. A fuel injector for an exhaust heater, comprising:
- a combustor cover extending about a nozzle seat with a fuel inlet and an air inlet, the nozzle seat arranged along a flow axis; and
an air blast nozzle having a unibody supported in the nozzle seat, the air blast nozzle unibody in fluid communication with the fuel inlet and the air inlet and arranged along the flow axis to port fuel and air into a combustion volume.
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Abstract
A fuel injector for an exhaust heater includes a cover and an air blast nozzle. The cover has a nozzle seat, a fuel inlet, and an air inlet, the nozzle seat arranged along a flow axis. The air blast nozzle is seated in the nozzle seat and has a unibody. The air blast nozzle unibody is in fluid communication with the fuel inlet and the air inlet arranged along the flow axis to port fuel and air into a combustion volume, e.g., to heat a stream of exhaust gas flowing between an engine and a catalytic reactor by combustion with fuel introduced through the fuel inlet and air introduced through the air inlet.
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Citations
20 Claims
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1. A fuel injector for an exhaust heater, comprising:
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a combustor cover extending about a nozzle seat with a fuel inlet and an air inlet, the nozzle seat arranged along a flow axis; and an air blast nozzle having a unibody supported in the nozzle seat, the air blast nozzle unibody in fluid communication with the fuel inlet and the air inlet and arranged along the flow axis to port fuel and air into a combustion volume. - View Dependent Claims (2, 3, 4, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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5. The fuel injector as recited in claim 5, wherein each of the outer air channels has an inlet and an outlet, the outlet arranged radially inward of the inlet relative to the air blast nozzle.
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20. A method of making a fuel injector for an exhaust heater, comprising:
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seating an o-ring about an air blast nozzle; inserting the air blast nozzle into a nozzle seat defined within a combustor cover such that the o-ring is arranged between the air blast nozzle and the combustor cover; rotating the air blast nozzle about a flow axis defined by the combustor cover to compress the o-ring and lock a male bayonet feature within a female bayonet feature; and fixing the air blast nozzle in rotation relative to the combustor cover.
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Specification