Electromagnetic fuel injection valve

An electromagnetic fuel injection valve comprising:

• a valve element which closes a fuel passage by coming into contact with a valve seat and opens the fuel passage by going away from the valve seat;
• an electromagnet which includes a coil and a magnetic core formed as a drive portion for driving the valve element;
• a movable element which is held by the valve element in a state where the movable element is displaceable in the direction of a drive force of the valve element relative to the valve element;
• a first biasing portion for biasing the valve element in the direction opposite to the direction of a drive force generated by the drive portion;
• a second biasing portion for biasing the movable element in the direction of the drive force with a biasing force smaller than the biasing force generated by the first biasing portion;
• and
• a restricting portion for restricting the displacement of the movable element in the direction of the drive force relative to the valve element,
• wherein the biasing force (N) of the second biasing portion is set smaller than a sum of:
• i) a value which is obtained by multiplying a product of a valve closing speed (m/s) of the valve element and a mass (kg) of the movable element by −7.5×103 (l/s), and ii) a value which is obtained by multiplying a sum of the mass of the movable element and a mass of the valve element by 2.6×103 (m/s2).