Vibration sensor for an automotive vehicle engine
US4364259A · kind A · utility
6Cited by
4References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 8, 1980 |
| Grant date | Dec 21, 1982 |
| Priority date | — |
| Expiry date | Jul 8, 2000 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R17/02
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A vibration sensor for an automotive vehicle having a piezoelectric element of diaphragm type for detecting mechanical vibrations from an internal combustion engine such as knocking frequency. The piezoelectric element is formed within a holder of plastic or the like and bonded thereto in a manner to accurately regulate the clamping pressure at the element periphery and regulate the vibration area thereof to accurately regulate the resonant frequency of the vibration sensor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.