FUEL INJECTION VALVE

PROBLEM TO BE SOLVED: To provide an injector reducing bound of a movable core and a valve member with a simple structure without causing increase of number of parts and having a little variation of fuel injection characteristics. SOLUTION: The movable core 50 and a needle 30 can freely relatively move in an axial direction in a predetermined range. Consequently, bound of the movable core 50 at a time of operation of the needle 30 is absorbed by movement of the movable core 50 and the needle 30 in opposite directions. Relative movement between the needle 30 and the movable core 50 is mitigated by damping effect of fuel in a fuel chamber 56 formed between a cylinder part 54 of the movable core 50 and a first regulation member 61 and a fuel chamber formed between the movable core 50 and a second regulation member 62. Impact due to collision is mitigated while securing movement of the needle 30 and the movable core 50 as one unit, thereby. COPYRIGHT: (C)2006,JPO&NCIPI