| 主权项 |
1. A fuel injector comprising:
a coil generating a magnetic flux when being energized; a stator core generating a part of a magnetic circuit as a passage of the magnetic flux, the stator core generating an electromagnetic force; a movable core moved by the electromagnetic force; a valve body moved together with the movable core, the valve body opening an injection port; and an elastic-force applying portion being elastically deformable according to a movement of the valve body to apply an elastic force to the valve body in a valve-closing direction, wherein an elastic coefficient of the elastic-force applying portion is set to meet a condition that Ffc−Ffo≦L×K, wherein among fuel-pressure valve-closing forces applied to the valve body in the valve-closing direction by a fuel pressure, the fuel-pressure valve-closing force of when the valve body is closed is referred to as Ffc, the fuel-pressure valve-closing force of when the valve body is moved to a position where the valve body is completely opened is referred to as Ffo, a movement distance of the valve body from a time point that the valve body is closed to a time point that the valve body is completely opened is referred to as L, and the elastic coefficient is referred to as K. |
