Spark plug with capacitor spark discharge

Details Spark plug with capacitor spark discharge Spark plug with capacitor spark discharge

1984-11-15

1986-09-23

Dixon, Harold

Electric lamp and discharge devices: systems

Combined load device or load device temperature modifying...

Discharge device load

313637, H01J 744

Patent

active

046137890

ABSTRACT:
A spark plug which has a capacitor located therein, connected in parallel to the main or ignition spark gap (13), additional includes a pilot or pre-spark gap (12) located within the insulator (18) of the spark gap, to control discharge of the capacitor (14) through the main spark gap (13). In accordance with the invention, the pre-spark gap (12) is located within a chamber (34) in the insulator which is filled with a pressurized gas, preferably nitrogen under pressure of between 2 to 100 bar, preferably 5 to 30 bar, with the electrodes (27, 27) defining the pre-spark gap being spaced, preferably, between about 0.1 to 1 mm from each other. Placing the pre-spark gap electrodes within a pressurized gas chamber increases the energy available at the main spark gap (13) for ignition even of very lean fuel-air mixtures. Preferably, an inductive-resistive circuit (15) is connected in shunt across the main electrode (13) to prevent arcing and glow discharges across the main spark gap (13) after the initial ignition spark.

REFERENCES:
patent: 1286316 (1918-12-01), Hewitt
patent: 1704781 (1929-03-01), Aspden
patent: 2103038 (1937-12-01), Moers
patent: 2376362 (1945-05-01), Kasarjian
patent: 3267325 (1966-08-01), Why
patent: 3443142 (1969-05-01), Koppl et al.
patent: 4549114 (1985-10-01), Herden

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