Apparatus and method for electronically reducing the impact of an armature in a fuel injector
US6128175A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 25, 1999 |
| Grant date | Oct 3, 2000 |
| Priority date | — |
| Expiry date | Mar 25, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01F2007/1894
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A method is provided to control velocity of an armature of a fuel injector as the armature moves from a first position towards a second position. The fuel injector includes a stator core at the second position and a coil is associated with the stator core. The coil, the stator core and the armature define a magnetic circuit. The coil generates a magnetic force to cause the armature to move towards and impact the stator core. The method includes energizing the coil to permit the armature to move towards the stator core. A rate of change of magnetic flux of the magnetic circuit is determined. Closed loop feedback control of the determined rate of change of magnetic flux is used to regulate a rate of magnetic flux by controlling current to the coil so as to control a velocity of the armature upon impact with the stator core.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.