Fuel injector utilizing a multiple current level solenoid
US6167869A · kind A · utility
22Cited by
22References
29Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 3, 1997 |
| Grant date | Jan 2, 2001 |
| Priority date | — |
| Expiry date | Nov 3, 2017 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/86928
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A fuel injector includes first and second valves and a solenoid including a solenoid coil and an armature assembly wherein the first and second valves are coupled to the armature assembly. A solenoid drive circuit is coupled to the solenoid coil and delivers a first current waveform portion to the solenoid coil at a first time to cause the armature assembly to operate the first valve without operating the second valve. A second current waveform portion different than the first current waveform portion is applied to the solenoid coil at a second time later than the first time to operate the second valve.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.