| 摘要 |
PROBLEM TO BE SOLVED: To provide a fuel injection valve allowing a fuel injection rate to be changed with simple structure.SOLUTION: A needle 40 formed of a magnetic material includes a body 41, a seal part 42, and a needle large-diameter part 44. When the seal part 42 abuts on a valve seat 312, a distance d1 is formed between an end face 61 of a fixed core 60 and a second stepped face 49 of the needle large-diameter part 44, and a distance d2 smaller than the distance d1 is formed between the end face 61 and an end face 57 of an annular projected part 56 of a movable core 50. When power supply is started on a coil 70, the movable core 50 and the needle 40 are attracted to the fixed core 60, the end face 57 abuts on the end face 61 first, and the needle 40 is lifted by the distance d2. When more current flows in the coil 70, the second stepped face 49 abuts on the end face 61, and the needle 40 is lifted by the distance d1. An fuel injection rate is controlled thereby in a fuel injection valve 1. |
