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US 2023/0056816 A1Published application
Spark plug
AssigneeDenso Corporation
InventorRyohei AKIYOSHI
Life of this patent
Estimating the term…
Abstract
A spark plug includes a first discharge chip and a second discharge chip which faces the first discharge chip and works to produce an electrical spark therebetween. At least one of the first and second discharge chips is made from material containing iridium, platinum, and tantalum. An amount of platinum in the material is in a range of 5 Wt % to 30 Wt %. An amount of tantalum is in a range of 0.3 Wt % to 7.5 Wt %. Use of such material enhances a wear resistance of the spark plug.
Claims6
A spark plug comprising:
- a first discharge portion;
- and
- a second discharge portion which faces the first discharge portion and works to produce a spark between itself and the first discharge portion, wherein
- at least one of the first discharge portion and the second discharge portion is made from material containing iridium, platinum, and tantalum,
- an amount of platinum contained in the material lies in a range of 5 Wt % to 30 Wt %, and
- an amount of tantalum contained in the material lies in a range of 0.3 Wt % to 7.5 Wt %.
3 more elements
Dependencies are inferred from the claim text.