Compensation method and apparatus for fuel injection amount during engine warm-up
US5507265A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 2, 1995 |
| Grant date | Apr 16, 1996 |
| Priority date | — |
| Expiry date | Jun 2, 2015 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02D41/068
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
In a method and apparatus which compensates a fuel injection amount by a first fuel enrichment coefficient dependent on an engine coolant temperature during engine warm-up period after engine starting, the fuel injection amount is compensated further by a second fuel enrichment coefficient from a time an engine revolution speed falls until a time a predetermined interval lapses. The second fuel enrichment coefficient may be changed by a throttle valve opening condition and/or an engine intake air pressure. The fuel injection amount may be further compensated further by a third fuel enrichment coefficient until a time another predetermined interval shorter than the predetermined interval lapses, when a fall of the engine revolution speed is large.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.