| 摘要 |
PROBLEM TO BE SOLVED: To provide a fuel injection valve having excellent responsiveness and capable of accurately and stably performing opening/closing operations for a long period. SOLUTION: In this fuel injection valve, a movable iron core 23 and a valve element 24 are fixed to a plate spring-made return spring 17, and reciprocatingly moved in a floated state. A nonmagnetic cylindrical contact member 26 to bring the compression of a cushioning layer 25 installed at the tip face of a fixed iron core 10 into an elastic deformation range is installed on the tip outer peripheral surface thereof. The contact member 26 is closely fitted to a fitting hole 28 using, as a center, the centerline N-N of the fixed iron core 10 fitted to a nonmagnetic holding member 27 to position the fixed iron core 10 and the movable iron core 23 on the centerline N-N. Since the cushioning layer 25 and the contact member 26 make constant the suction stroke of the movable iron core 23 and stabilizes the valve opening amount of the valve element 24. Thus, the responsiveness can be improved by securing a release voltage. COPYRIGHT: (C)2005,JPO&NCIPI |
