| 摘要 |
PURPOSE:To improve responsiveness at high speed as well as to secure an injection quantity for a short pulse signal, by forming a partial position, showing a saturated magnetic flux characteristic in a degree almost idential to magnetic flux to be produced in a face-to-face part between a stator and an armature, in a magnetic throttle part of a case body. CONSTITUTION:An electromagnetic fuel injection valve is made up of a case body 2, a stator 8 and an armature 9. A partial position, showing a saturated magnetic flux characteristic in a degree almost identical to magnetic flux to be produced in a face-to-face part between the stator 8 and the armature 9 just after an end of valve opening motion, is formed in a part of a magnetic throttle 23 of the case body 2. Thus, valve opening motion time is reducible whereby responsiveness at high speed is sufficiently obtainable and, what is more, an injection quantity for a short pulse signal is securable.
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