Glow plug with glass coating over ion detection electrode
US6326595A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 6, 2000 |
| Grant date | Dec 4, 2001 |
| Priority date | — |
| Expiry date | Dec 6, 2020 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF23Q2007/004
- WIPO fieldThermal processes and apparatus
- WIPO sectorMechanical engineering
Abstract
A glow plug includes a metallic sleeve 1; a cylindrical metallic shell 2, which holds the metallic sleeve 1; a terminal electrode 3, which is attached into the cylindrical metallic shell 2 while being insulated therefrom; a ceramic heating member 4, which is fitted into the metallic sleeve 1; and a glass coating layer 5. In the glow plug, a portion of an ion detection electrode 411 is exposed at the surface of an insulator 44 of the ceramic heating member 4. The exposed portion is coated with a glass coating layer 5, which is formed in such a manner as to extend all around the insulator 44 of the ceramic heating member 4 and has a thickness of 10-200 .mu.m and a softening point of not lower than 600.degree. C.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.