SOC signal analysis
US4651562A · kind A · utility
2Cited by
4References
7Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 26, 1986 |
| Grant date | Mar 24, 1987 |
| Priority date | — |
| Expiry date | Mar 26, 2006 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01P3/64
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
According to the invention, the time for start of combustion in an engine cylinder is provided by disposing a sensor in the combustion chamber of the cylinder, said sensor providing a signal indicative of the amplitude/time of the combustion event within the cylinder. Two signal levels are measured, a first level which is above the noise in the signal and a second level which is below the maximum amplitude of the signal which may be attenuated by carbon buildup on the sensor. By extrapolating backwards from these two sensed levels, a reference time for start of combustion is calculated.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.