System and method for controlling an ignition timing for an internal combustion engine
US4825832A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 19, 1988 |
| Grant date | May 2, 1989 |
| Priority date | — |
| Expiry date | Apr 19, 2008 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/40
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A system and method for controlling an ignition timing for an internal combustion engine, in which one of knock suppression correction quantity and MBT (Maximum Spark Advance for Best Torque) correction quantity whose value is placed at a more retardation angle side is selected as the ignition timing correction quantity, the ignition timing angle correction quantity is compared with the knock suppression quantity when a magnitude of the engine knocking exceeds a predetermined level. When the knock suppression correction quantity is placed at a more advance angle side than the ignition timing correction quantity, a basic ignition timing angle determined on the basis of an engine operating condition is corrected on the basis of a value of the ignition timing correction quantity corrected toward the retardation angle side by a predetermined angle. When the knock suppression correction quantity is not placed at the more advance angle side, the basic ignition timing angle is corrected on the basis of the knock suppression correction quantity.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.