Spark plug with enlarged center electrode and gap

Details Spark plug with enlarged center electrode and gap Spark plug with enlarged center electrode and gap

1996-07-09

1998-06-16

O'Shea, Sandra L.

Electric lamp and discharge devices

Spark plugs

Particular electrode structure or spacing

313133, 313139, H01T 1320

Patent

active

057676135

ABSTRACT:
A spark plug for an internal combustion engine that burns fuel from a fuel source, the engine including a block assembly with a piston cylinder, a fluid combustion chamber connected to the piston cylinder, and an air and fuel mixing area that communicates with the combustion chamber for delivering an air and fuel mixture to the combustion chamber. A fuel delivery system is connected to the block assembly, and the fuel delivery system has a fuel passage that communicates with the fuel mixing area. The fuel delivery system has a delivery nozzle connected to the fuel passage and being directed toward the fuel mixing area, and the delivery nozzle is sized to spray a selected amount of fuel into the mixing area for mixing with air therein to provide an air and fuel mixture having an air-to-fuel ratio in the range of 90:1 to 240:1. A fuel line is connected to the fuel source and the fuel delivery system to carry the fuel from the fuel tank to the fuel delivery system. A spark plug is connected to the block assembly and positioned to generate a spark in the combustion chamber to ignite the air and fuel mixture. The spark plug has a center electrode and a ground electrode spaced apart from each other by a spark gap in the range of 1.5 mm to 2.O mm. The center electrode is a platinum electrode having a diameter in the range of 4.5 mm to 7.5 mm.

REFERENCES:
patent: 1989670 (1935-02-01), Anthony
patent: 3706897 (1972-12-01), Shepardson
patent: 4695758 (1987-09-01), Nishida et al.
patent: 5196760 (1993-03-01), Takamura et al.
patent: 5493171 (1996-02-01), Wood et al.

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