Piezoelectric pick-up device for internal combustion engine
US4660409A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 18, 1984 |
| Grant date | Apr 28, 1987 |
| Priority date | — |
| Expiry date | Dec 18, 2004 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01L23/222
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A piezoelectric pick-up device for an internal combustion engine is disclosed, which comprises a metal case mounted on an internal combustion engine cylinder wall or the like, a mounting metal rod projecting from the inner bottom surface of the metal case into the interior thereof, a piezoelectric element and a weight disposed in the case interior and fitted on the mounting rod, the piezoelectric element being electrically coupled to the metal case, a cap-like cover fittedly covering the weight or the entirety of the piezoelectric element and the weight, and a molding material filling the case interior. The cap-like cover is made of an elastic material or a hard material.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.