Composite spark plug
An ignition device, engineering polymer technology, applied in the field of spark plugs, can solve the problem of reducing the temperature of the ground electrode, undeclared, etc.
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[0047] Now refer to the attached drawings, especially figure 1 , The spark plug or ignition device used in the spark ignition type internal combustion engine of the present invention is usually shown as 1. The spark plug or ignition device 1 is composed of a box or housing 15 preferably of metal. The housing 15 has a substantially cylindrical base 44 on which an external thread 18 may be formed for use with a spark-ignited internal combustion engine ( The cylinder head (not shown) is engaged. The cylindrical base 44 of the spark plug housing has a generally flat plane perpendicular to the longitudinal axis of the spark plug 1 on which the ground electrode 16 is preferably attached by a conventional welding method. In an embodiment of the present invention, the ground electrode 16 has a preferably round top 45 of Rhenium / Tungsten sintered compound, and the top 45 prevents corrosion of the electrode 16 due to high-power discharge, As further disclosed here.
[0048]The spark plug o...
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