Sparking plug equipped with a pressure sensor, and combustion engine equipped with such sparking plugs
US6538366B1 · kind B1 · utility
Inventor
Key dates
| Filing date | Aug 14, 2000 |
| Grant date | Mar 25, 2003 |
| Priority date | — |
| Expiry date | Feb 6, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01L23/22
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A sparking plug for a combustion engine, includes a metal shell with an externally threaded end part for screwing into a tapped hole in a cylinder head. The shell supports, on the inside, an insulating body, through which there passes a central electrode capable of being connected to a high tension. An annular chamber is delimited by an interior surface in the region of the threaded end part of the shell and the exterior surface of the end of the insulating body. The sparking plug also has at least one pressure sensor, and is designed to subject this sensor to the pressure of an associated combustion chamber when the sparking plug is in place. The pressure sensor is installed in the threaded end part of the shell delimiting the annular chamber radially out from the internal surface of this end part such that the geometry of the annular chamber is not altered by the presence of the sensor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.