Low radio interference spark plug

Details Low radio interference spark plug Low radio interference spark plug

1990-07-24

1992-03-10

Yusko, Donald J.

Electric lamp and discharge devices

Spark plugs

Shaped electrode chamber, insulator end, shell skirt, baffle...

313136, 313137, 315 58, H01T 1320

Patent

active

050952420

ABSTRACT:
In a preferred embodiment, a resistor spark plug having a low level of RFI emissions, achieved by means of reducing the capacitances within the spark plug, so that the resistor in the spark plug is more effective. Reduction of the capacitances is accomplished by providing a resistor of relatively narrow diameter, providing a clearance space between the shell of the spark plug and the portion of the insulator where the resistor is located, and by providing an extended shell around the insulator above where the resistor is located. The improved effectiveness of the resistor reduces the energy transferred across the spark gap and, therefore, reduces erosion of the electrodes.

REFERENCES:
patent: 4460847 (1984-07-01), Englehardt
patent: 4795944 (1989-01-01), Stinson

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