Engine knock sensing apparatus
US4424705A · kind A · utility
7Cited by
4References
3Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | Dec 28, 1981 |
| Grant date | Jan 10, 1984 |
| Priority date | — |
| Expiry date | Dec 28, 2001 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01L23/223
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A knocking sensing apparatus for sensing a knocking taking place in an internal combustion engine. The apparatus includes a diaphragm adapted to operate in response to the pressure of cooling water circulated in the engine, magnetism generating device, magnetic circuit including the diaphragm, and a magnetic flux detecting device adapted to detect in a manner like alternating current the change in the magnetic flux in the magnetic circuit caused by the operation of the diaphragm.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.