| 摘要 |
<p>Audible noise emission from a solenoid-operated fuel injector is reduced by providing a groove (30) around the armature (20). In one form of the invention, the groove (30) extends around the outside diameter of the armature (20). In another form, the groove extends around the inside diameter of the armature. The groove is located and sized to optimize energy absorption during impact of the armature against the pole piece.</p> |
