| 摘要 |
PURPOSE:To improve a high speed response characteristic, by selecting a material capable of operating in high speed response to a magnetic circuit relating to a device having a fuel injection solenoid valve with a shuttle movable part. CONSTITUTION:If a pulse current flows in an excitation coil 1, magnetic flux is generated in a magnetic circuit, and a movable magnetic pole piece 4 is attracted by the magnetic flux to a core 3 against spring tension to separate a ball valve 6 from a valve seat and injection fuel from a nozzle 9. The magnetic circuit is formed by a soft magnetic material of, for instance, 5V-45Ni-Fe alloy meeting electric resistance at least 75muOMEGAcm and magnetic flux density (at 1,000Hz, 1,000e) at least 1.25. |
