Spark plug including a ground electrode having a small cross section
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United States of America Patent
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Jun 5, 2018
Issued Date -
Dec 14, 2017
app pub date -
Dec 3, 2015
filing date -
Dec 16, 2014
priority date (Note) -
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Abstract
A spark plug, including a housing, an insulator situated in the housing, a center electrode situated in the insulator and a ground electrode situated on the housing, the ground electrode and the center electrode being situated relative to one another in such a way that the ground electrode and the center electrode form a spark gap, and the ground electrode including a core and a sheath surrounding the core, the core being made of a material which has a higher thermal conductivity than the material of the sheath, and a cross sectional area of the ground electrode being not greater than 2.76 mm2, the sheath having a wall thickness c of not greater than 0.4 mm in a first region of the ground electrode.
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