Electric lamp and discharge devices: systems – Combined load device or load device temperature modifying... – Discharge device load
Patent
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
Bloss Werner
Herden Werner
Dixon Harold
Robert & Bosch GmbH
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