Glow plug with integrated pressure sensor
US7350494B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 16, 2007 |
| Grant date | Apr 1, 2008 |
| Priority date | — |
| Expiry date | Apr 16, 2027 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF23Q2007/002
- WIPO fieldThermal processes and apparatus
- WIPO sectorMechanical engineering
Abstract
The invention relates to a glow plug with integrated pressure sensor for measuring pressure in the combustion chamber of an internal combustion engine, where the shell of the glow plug has a section of reduced diameter on the side next to the combustion chamber and following a sealing cone, which section houses a glow coil and ends in a tip extending into the combustion chamber, and where the pressure sensor is positioned without cooling in the section of the glow plug next to combustion chamber. According to the invention the pressure sensor is subjected to pressure in radial direction, the glow coil of the glow plug or the electrical leads of the glow coil being guided towards the tip of the glow plug either by bypassing the pressure sensor or going through the pressure sensor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.