Spark ignition device for an internal combustion engine and sparking tip therefor
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United States of America Patent
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Jun 28, 2011
Grant Date -
Nov 19, 2009
app pub date -
May 18, 2009
filing date -
May 19, 2008
priority date (Note) -
Expired
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Abstract
A spark ignition device is provided having an electrode sparking tip constructed from an AuPd alloy with the addition of at least 3 wt. % of a precious metal element selected from at least one of platinum, iridium, rhodium and ruthenium. The gold counteracts oxidation of the palladium and the additional elements provide the sparking tip with high temperature and high strength mechanical properties and resistance to alloying with the combustion constituents during use.
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