| 主权项 |
1. A fuel injection device comprising:
a fuel injector configured to insert into an attachment hole which is placed at a predetermined position of an internal combustion engine, the fuel injector having:
a coil energized to generate a magnetic flux;a stator core forming a part of a magnetic circuit which is a passage of the magnetic flux and generating an electromagnetic force;a movable core suctioned by the electromagnetic force;a valve body moving along with the movable core to open or close an injection port; anda housing in which the coil is provided, the housing forming a part of the magnetic circuit; and a control portion controlling an injection state of the fuel injector by controlling a coil current flowing through the coil, wherein a portion of the housing which accommodates the coil is referred to as a coil portion, the entire or a part of the coil portion is surrounded over a whole circumference by an inner circumference surface of the attachment hole, the control portion includes
an increasing control portion applying a voltage to the coil to increase the coil current to a first target value, anda holding control portion applying a voltage to the coil to hold the coil current increased by the increasing control portion to the first target value, andthe increasing control portion and the holding control portion control the voltage applied to the coil so that the valve body starts to be opened in a time period where the coil current is held to the first target value. |
