Vehicle engine ignition timing system and method with windowing knock control
US5163404A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Oct 22, 1991 |
| Grant date | Nov 17, 1992 |
| Priority date | — |
| Expiry date | Oct 22, 2011 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/40
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
An ignition timing system activates combustion ignition apparatus in a combustion chamber at times established at least partly in response to a knock retard value. The knock retard value is normally modified in response to a knock signal generated by a knock sensor during a knock window corresponding to a predetermined crankshaft rotational angle in which knock is to be sensed. However, if the knock signal is determined to be present at the beginning of an occurrence of the knock window, modification of the knock retard value in response to the knock signal is prevented during that occurrence of the knock window, since a knock signal already present at the beginning of the knock window is assumed to be noise.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.