Patent ID: 6702207
Filing Date: 2004-03-09
Classification: F02M,F16K

Abstract:
A method of controlling a flow of fuel in a fuel injector comprising:moving at least a portion of an armature in a cavity containing fluid; changing an opening area of a fuel port through the movement of the armature, thereby affecting the flow of fuel; forming a fluid passage for passing fluid between the armature and a wall defining the cavity as the armature moves towards the wall, the fluid passage formed to have an opening distance less than a spacing between the armature and the wall, the fluid passage formed by moving a dampener sleeve extending from the armature in a direction of armature motion and contacting the wall defining the cavity with a stop extending from the armature in the direction of armature motion farther than the dampener sleeves; increasing fluid pressure as the fluid passage forms; and dampening armature vibration through the increasing fluid pressure.