| 摘要 |
PROBLEM TO BE SOLVED: To provide a fuel injection valve highly accurately control an injection amount regardless of change in temperature. SOLUTION: The fuel injection valve 10 comprises: a valve member 20 opening/closing an injection hole 18a; a movable core 22 reciprocating and an axially moving together with the valve member 20; a fixed core 30 installed to be opposed to a movable core 22 on a side opposite to the injection hole 18a of the movable core 22; and a coil 46 generating a magnetic force making the fixed core 30 attract the movable core 22 when the coil is energized. Winding of the coil 46 is made from any one of Cu-Zn based alloy, Cu-Ni based alloy, Cu-Al based alloy, and Cu-Sn based alloy, which are smaller in temperature coefficient of resistance than that of copper wire. Since change in volume resistivity of the coil 46 caused by change in ambient temperature of the fuel injection valve 10 is reduced, variation in valve open time of the fuel injection valve 10 from the start of the energization of the coil 46 to the separation of the valve member 20 from a valve seat 17. COPYRIGHT: (C)2007,JPO&INPIT
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