Piezoelectric knocking detector for internal combustion engine
US4225802A · kind A · utility
21Cited by
7References
4Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | Jan 9, 1979 |
| Grant date | Sep 30, 1980 |
| Priority date | — |
| Expiry date | Jan 9, 1999 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01L23/222
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A knocking detector for an internal combustion engine includes a vibration unit comprising an inertial mass member and springs which are mounted in a housing attached to an engine body. The spring constants of the springs are so selected that the resonant frequency of the vibration unit becomes substantilly equal to the frequency of vibration due to knocking of the engine, and the vibration of the vibration unit is detected and converted into an electric signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.