Electrode material for use with a spark plug
US8436520B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jul 28, 2011 |
| Grant date | May 7, 2013 |
| Priority date | — |
| Expiry date | Aug 1, 2031 |
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 a center electrode, a ground electrode or both that includes an electrode material that is a Pt-based alloy. The electrode material may include platinum (Pt), at least one active element like aluminum (Al) or silicon (Si), and at least one high-melting point element such as ruthenium (Ru), iridium (Ir), tungsten (W), molybdenum (Mo), rhenium (Re), tantalum (Ta), niobium (Nb), chromium (Cr), or a combination thereof. In at least some of the disclosed alloys, the aluminum (Al) and/or silicon (Si) contributes to the formation of a thin protective oxide layer on a surface of the electrode material.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.