| 摘要 |
PURPOSE:To restrict a degree of freedom of movement of a movable iron core, and improve fuel metering accuracy and stability of fuel atomization and injection amount every injection stage, by guiding a driving direction of the movable iron core with a guide member. CONSTITUTION:When an electromagnetic coil 5 is excited to attract and lift a movable iron core 15 to a spacer 7 with a rod 30 slided on the inner circumference of the spacer 7, a ball valve 16 is separated from a valve seat 22, and accordingly fuel in a valve chamber 14 is injected to an engine. Since the rod 30 as a guide member of the movable iron core 15 is slided on the inner circumference of the spacer 7 to guide the movable iron core 15, a degree of freedom of movement of the movable iron core 15 is restricted to stabilize a driving condition of the movable iron core 15. As a result, the ball valve 16 is stably separated from and seated on the valve seat 22. |
