| 摘要 |
<p>A control valve (16) of an engine fuel system includes a valve member which is coupled to an armature (17) and is moved to engage a seating when a winding (18) is energised. The current flow in the winding is first allowed to rise to a peak value to initiate movement of the armature and valve member at which time the winding is disconnected from the supply. The decay of current in the winding is controlled using two rates of current decay to ensure that the valve member moves into engagement with the seating with the minimum of bounce.</p> |
