Spark plug having an inductive upper portion incorporating a coil wound around an elastically deformable core element
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United States of America Patent
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Jan 26, 2010
Grant Date -
Feb 26, 2009
app pub date -
Mar 23, 2006
filing date -
Jun 23, 2005
priority date (Note) -
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Abstract
A spark plug for an internal combustion engine of a motor vehicle; the spark plug is embodied with a generally essentially long shape and includes: an essentially capacitive lower part including two coaxial electrodes, one of which is a central electrode, and the other a threaded shell for screwing in the spark plug on the engine; and an essentially inductive upper part including a central winding including a plurality of coils wound around a coaxial mandrel, an envelope, and an insulator inserted between the envelope and the winding. The essentially capacitive part and the essentially inductive part are mechanically interconnected as to enable transmission of a clamping couple applied to the envelope to the essentially capacitive lower part. The mandrel can be elastically deformed as to compensate effects of dilation of the insulator.
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