Spark plug to be mounted on an internal combustion engine having a water spray injector
US10886707B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 16, 2020 |
| Grant date | Jan 5, 2021 |
| Priority date | — |
| Expiry date | Apr 16, 2040 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/12
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A spark plug has a housing of a cylindrical shape and an insulator of a cylindrical shape supported inside the housing. A position of an insulator distal end at a distal end of the insulator is arranged equal to or forward of a position of a distal end of the housing in an axial direction of the spark plug. The spark plug satisfies a relationship designated by an equation, −0.064L2+0.26E+0.53≤T≤0.07L2−0.35L+1.36, where T indicates a thickness of the insulator distal end of the insulator, and L indicates an insulator projection length measured from the position of the distal end of the housing to the position at the insulator distal end surface of the insulator.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.