| 主权项 |
1. A fuel injection valve comprising:
a housing that is configured into a tubular body and has: an injection hole, through which fuel is injected; a fuel passage that is communicated with the injection hole; and a valve seat that is formed in an inner wall of the fuel passage; a needle valve that is received in the housing and is axially reciprocatable in the housing, wherein:
the needle valve has a flange that radially outwardly projects;the needle valve opens the injection hole when the needle valve is lifted away from the valve seat; andthe needle valve closes the injection hole when the needle valve is seated against the valve seat;a coil that generates a magnetic field in an energized state of the coil;a stationary core that is fixed in the housing at a corresponding location that is within a range of the magnetic field generated from the coil;a movable core that is axially reciprocatable and is placed on one axial side of the stationary core where the injection hole is located, wherein the movable core is contactable with an end surface of the flange of the needle valve, which is located on an axial side where the injection hole is located;a first spring that axially urges the needle valve toward the injection hole;a second spring that axially urges the movable core toward the stationary core with an urging force that is smaller than an urging force of the first spring, which axially urges the needle valve toward the injection hole; anda stopper that is placed on one axial side of the movable core where the injection hole is located, wherein;the stopper contacts the movable core to limit movement of the movable core toward the injection hole and to limit an amount of compression of the second spring;the needle valve is seated against the valve seat by the urging force of the first spring in a deenergized state of the coil;the movable core is urged by the urging force of the second spring to contact the end surface of the flange, which is located on the axial side where the injection hole is located, in the deenergized state of the coil; andthe movable core is entirely lifted away from the stopper and is entirely separated from the stopper by a gap, which is formed between the stopper and the movable core, in the deenergized state of the coil. |
