Spark plug with pressure sensor
US6204594A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 12, 1998 |
| Grant date | Mar 20, 2001 |
| Priority date | — |
| Expiry date | Jun 12, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01L23/22
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A spark plug is installed in an internal combustion engine to monitor engine performance. The spark plug includes an outer shell having a central longitudinal axis and defining a first bore extending along the central longitudinal axis. The outer shell also includes a second bore that is offset from the central longitudinal axis. An insulative core is positioned in the first bore and defines a third bore concentric with the first bore. A first electrode is positioned in and has a firing end extending beyond the third bore. A second electrode including a firing surface is located adjacent to the firing end of the first electrode. A sensor is located within the third bore.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.