Spark plug for internal combustion engine
US6094000A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 13, 1996 |
| Grant date | Jul 25, 2000 |
| Priority date | — |
| Expiry date | Jun 13, 2016 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01T13/39
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
To improve the consumption resistance and lifetime, a spark plug for an internal combustion engine comprises: an insulation porcelain having a throughhole; a center electrode held at one end of the throughhole; a housing holding the insulation porcelain; a ground electrode disposed at an front end of the housing and facing the center electrode; a spark gap defined by the center electrode and the ground electrode; and at least one of the center electrode and the ground electrode having a noble metal chip bonded to a discharging spot of an front end thereof, wherein the noble metal chip consisting of an Ir-Rh alloy contains Rh in an amount of from 1 wt % to 60 wt %.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.