Spark plug with platinum-based electrode material
US8274204B2 · kind B2 · utility
1Cited by
1References
19Claims
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Key dates
| Filing date | Nov 24, 2010 |
| Grant date | Sep 25, 2012 |
| Priority date | — |
| Expiry date | Dec 31, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01T13/39
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A spark plug for an internal combustion engine has one or more electrodes with an electrode material of a platinum (Pt) based alloy. The alloy includes aluminum (Al) and one or more refractory metals selected from the group containing nickel (Ni), rhenium (Re), ruthenium (Ru), tantalum (Ta), molybdenum (Mo), and tungsten (W). In at least some of the disclosed alloys, the aluminum contributes to the formation of an aluminum oxide (Al2O3) layer on a surface of the electrode material.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.