Means for attenuating audible noise from a solenoid-operated fuel injector
US5207387A · kind A · utility
17Cited by
3References
12Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 29, 1991 |
| Grant date | May 4, 1993 |
| Priority date | — |
| Expiry date | Jul 29, 2011 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02M2200/306
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
Audible noise emission from a solenoid-operated fuel injector is reduced by providing a circumferential slot around the end of the stator at the working gap between the stator and the armature. In one form of the invention the slot is unoccupied and creates a flange that absorbs impact energy by deflection. In another form the slot is filled with dimagnetic material that exerts an opposing force that retards armature motion as the armature approaches the stator in response to solenoid energization opening the injector.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.