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US 7,459,628 B2Granted
Ignition wire having low resistance and high inductance
AssigneeFederal-Mogul World Wide, Inc.
InventorPhillip Farmer
Life of this patent
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Abstract
A high voltage ignition wire (10) has a ferrite core, a coiled wire (14) surrounding the core, and an insulating sheath surrounding the coiled wire. The coiled wire (14) is made from theoretically pure copper having a strand diameter of 0.081-0.099 inches. The coiled wire (14) is wound around the core between 140 and 160 turns per inch. The specific construction of this high voltage ignition wire (10) achieves an advantageous resistance of 13.5-16.5 ohms/ft.
Claims12
An ignition wire, comprising:
- an elongated ferrite core;
- a coiled wire surrounding said ferrite core, said coiled wire having a diameter of 0.081-0.099 inches;
- and
- an insulating sheath surrounding said coiled wire;
- wherein said ignition wire exhibits a resistance of 13.5-16.5 ohms/ft.
2 more elements
An ignition wire, comprising:
- an elongated ferrite core exhibiting a high magnetic permeability;
- a coiled wire surrounding said ferrite core, wherein said coiled wire (i) has a diameter that of 0.081-0.099 inches, (ii) includes 140-160 turns/inch, and (iii) comprises substantially pure copper;
- and
- an insulating sheath surrounding said coiled wire;
- wherein said ignition wire exhibits a resistance of 13.5-16.5 ohms/ft.
2 more elements
Dependencies are inferred from the claim text.