Method for controlling timing of spark ignition for an internal combustion engine by feedback related to the detection of knocking
US4268910A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Dec 14, 1978 |
| Grant date | May 19, 1981 |
| Priority date | — |
| Expiry date | Dec 14, 1998 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/40
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
The timing of spark ignition is set in normal operating conditions at a programed spark advance angle corresponding to the MBT (minimum spark advance for best torque). When knocking of the engine is detected by a vibration sensor, the ignition timing is delayed by a predetermined amount, e.g., 2.DELTA..theta., for each engine cycle that knocking is detected in synchronism with the rotation of the engine. When knocking is not detected, the ignition timing is advanced by another predetermined amount, for each engine cycle that knocking is not detected. e.g., .DELTA..theta.. In this method for controlling the spark timing, the amount of retardation, 2.DELTA..theta., is selected to be larger than the other amount of advance, .DELTA..theta..
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.