SPARK PLUG
Number of patents in Portfolio can not be more than 2000
United States of America
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Issued Date -
Nov 28, 2024
app pub date -
May 21, 2024
filing date -
May 21, 2024
priority date (Note) -
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status (Latency Note)
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Abstract
A spark plug includes: a center electrode; a metal shell that holds the center electrode in an insulated manner; and a rod-like ground electrode electrically connected to the metal shell and having one end opposed to the center electrode. The metal shell includes a tubular distal end portion inside which the one end of the ground electrode is located. The distal end portion has a hole into which the other end of the ground electrode is inserted. A value obtained by dividing a surface area of a portion of the ground electrode, the portion being located on an inner circumferential side of the distal end portion, by a side surface area of a portion of the ground electrode, the portion being located inside the hole, is less than or equal to 13.1.
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