Insulator shield for spark plug
US6170458A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 11, 1999 |
| Grant date | Jan 9, 2001 |
| Priority date | — |
| Expiry date | Jun 11, 2019 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/12
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A direct injection combustion engine includes a combustion chamber that includes a fuel intake port, an air intake port and a spark plug insertion opening. A spark plug includes a firing electrode, a ground electrode, and an insulator core nose. The spark plug is installed in the spark plug insertion opening so that the firing electrode, the ground electrode, and the insulator core nose extend into the chamber. A shield is positioned between the fuel intake port and the spark plug insertion opening and reduces the flow of fuel from the fuel intake port to the insulator core nose without preventing the flow of fuel to a spark gap formed between the firing electrode and the ground electrode.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.