Spark plug with engine cylinder pressure sensor
US6359377B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Feb 2, 1999 |
| Grant date | Mar 19, 2002 |
| Priority date | — |
| Expiry date | Feb 2, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01L23/22
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A pressure-sensing ignition device (10) for use in a spark ignition system of an internal combustion engine. The device (10) generally includes a body (14) having a longitudinal axis of symmetry and an internal chamber (12). Disposed in the chamber (12) adjacent one end of the body (14) is an orifice (44) that vents the chamber (12) to the exterior of the body (14). An electrode (18) and an optical pressure transducer (24) are present within the body (14). An optical cable (22) is connected to the transducer (24) for transmitting an optical pressure signal. Means (20) is provided for conducting a current to the electrode (18) via the optical cable (22).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.