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US 4,391,582 AGranted
Fuel nozzle with concentric ignitor
OwnerFrederick C. Cowaninventor
Life of this patent
Estimating the term…
Abstract
An electric ignitor to be used for fuel mixture ignition that delivers fuel through a fuel nozzle having integral concentric electrodes arranged such that radiated fuel from the nozzle washes a power arc providing required light-off energy.
Claims12
A power arc ignitor comprising:
- a fuel nozzle, said nozzle being constructed from concentric metal tubes spaced by a ceramic insulator body;
- a means to terminate the insulator body with a semi-conductive surface to provide a conductive path across an end of the insulator body from an outer one of the tubes to an inner one of the tubes;
- means to deliver fuel to the inner one of said tubes to flow therethrough;
- and
- means to controllably connect a high energy positive potential to the inner tube and a ground potential to the outer one of the tubes to originate an electrical arc pulsation from the inner to the outer of said concentric tubes across said conductive path at the end of the insulator body.
2 more elements
A power arc ignitor fuel nozzle comprising:
- a first conductive tube of a predetermined diameter and of a finite length;
- a second conductive tube of a diameter greater than said first tube and of a finite length;
- a core between said first tube and said second tube uniting same in an assembly, said core having an insulator portion and a conductive portion that will conduct electric energy between said first tube and said second tube;
- a means to deliver fuel from said first tube;
- and
- a means to provide light-off energy at the point of delivery of said fuel from said first tube, said means including apparatus to connect a high energy positive potential to said first tube and a ground potential to said second tube.
3 more elements
A high energy device for igniting a fuel which comprises:
- an inner cylindrical metal pipe;
- means electrically grounding said inner pipe;
- an intermediate cylindrical semi-conductor element, said element being concentrically disposed about and spaced from said inner pipe;
- an outer cylindrical metal pipe, said outer pipe being concentrically disposed about and spaced from said element;
- means to impress a high voltage electrical potential into said outer pipe, whereby an ignition arc spark is formed on said element between said inner and outer pipes;
- insulator means external to said outer pipe;
- and
- means to pass a fuel in contact with a surface of said intermediate element, so that said fuel may be ignited and burned.
5 more elements
Dependencies are inferred from the claim text.