Vehicle ignition system having adaptive knock retard with starting temperature correction
US5327868A · kind A · utility
6Cited by
9References
3Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | Jul 19, 1993 |
| Grant date | Jul 12, 1994 |
| Priority date | — |
| Expiry date | Jul 19, 2013 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/40
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A vehicle engine utilizes adaptive knock retard in which non-volatile memory cells store slowly changed values based on sensed knock to retard ignition timing. Upon engine start, the values in one or more of the memory cells may be reduced in a proportional manner to provide a more advanced engine ignition timing more appropriate to engine warmup. The proportional reduction is based on the sensed engine coolant temperature at the initiation of engine operation, either by itself or through the difference between it and the stored engine coolant temperature from just before the cessation of the last period of engine operation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.