Spark plug electrode for use in internal combustion engine

Details Spark plug electrode for use in internal combustion engine Spark plug electrode for use in internal combustion engine

1994-04-26

1995-09-05

O'Shea, Sandra L.

Electric lamp and discharge devices

Spark plugs

Particular electrode structure or spacing

313142, H01T 1320

Patent

active

054481309

ABSTRACT:
In a spark plug electrode in which an alloyed tip is secured to a firing end of one of opposed electrodes forming a spark gap therebetween, the tip has a spark-erosion resistant noble metal component, and the noble metal component varies as a weight percentage of the alloyed tip in an axial direction of the electrode depending on a magnitude of spark discharges to which a specified portion of the tip is subjected between the opposed electrodes, wherein a largest weight percentage of the noble metal component is provided at areas on the electrode subjected to relatively high magnitude spark discharges, and wherein a smallest weight percentage of the noble metal component is provided at areas on the electrode subjected to relatively low magnitude spark discharges.

REFERENCES:
patent: 4581558 (1986-04-01), Takamura et al.
patent: 5101135 (1992-03-01), Oshima
patent: 5347193 (1994-09-01), Oshima et al.

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