Method and apparatus for generating fuel injection valve control pulses
US4140087A · kind A · utility
16Cited by
2References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 17, 1976 |
| Grant date | Feb 20, 1979 |
| Priority date | — |
| Expiry date | Nov 17, 1996 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02D41/2403
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
The air flow rate and the speed of an internal combustion engine are sensed and translated into pulse trains of variable frequency. During a time interval defined by the rpm related signal, a digital counter receives and counts the air flow rate frequency. Subsequently, the contents of this counter are counted out by a pulse train whose frequency is adjustable depending on other engine conditions such as start-up, warm-up, idling, full-load and the like. The apparatus also includes circuitry for generating a control pulse of minimun length.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.