Glow plug with combustion pressure detecting function
US7185621B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 4, 2005 |
| Grant date | Mar 6, 2007 |
| Priority date | — |
| Expiry date | Aug 4, 2025 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF23Q2007/002
- WIPO fieldThermal processes and apparatus
- WIPO sectorMechanical engineering
Abstract
A glow plug comprising: a cylindrical housing; a heater member as defined herein; a conductive center pole as defined herein; a first piezoelectric element as defined herein; and a second piezoelectric element as defined herein, wherein each of said first piezoelectric element and said second piezoelectric element is subjected to a preload for compressing it in said axial direction and is arranged such that, when said center pole is displaced to a root-end side, a load to be applied to one of said first piezoelectric element and said second piezoelectric element for compressing the same in said axial direction increases whereas a load to be applied to the other for compressing the same in said axial direction decreases.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.