Method of detecting a knock in an internal combustion engine by means of ionic current
US6439029B2 · kind B2 · utility
6Cited by
3References
10Claims
0Family size
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Key dates
| Filing date | Feb 15, 2001 |
| Grant date | Aug 27, 2002 |
| Priority date | — |
| Expiry date | Feb 15, 2021 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02P2017/128
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
There is provided an improved method of detecting an occurrence of a knock in an internal combustion engine by detecting an ionic current flowing in a cylinder of the engine from initiation of combustion therein and judging a knock component overlapping the ionic current based on a judging level, the method including the steps of: detecting a peak value of the ionic current; and relatively correcting at least one of the judging level and the knock component based on the peak value thus detected so as to make more difficult a judgment of whether the knock occurs or not as the detected peak value increases.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.