| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a fuel injection valve which can make a damper effect efficiently function by a simple structure. <P>SOLUTION: In a needle 40 and a movable core 50, a first cylindrical clearance 101 is formed between a large diameter part 44 and a large diameter inner wall surface 51, a second cylindrical clearance 102 is formed between a small diameter part 43 and a small diameter inner wall surface 52, and a capacity-variable annular damper chamber 103 is formed between a needle step surface 45 and a core step surface 53. The needle 40 and the movable core 50 are formed so that an axial length L1 in the first clearance 101 is longer than an axial length L2 in the second clearance 102 when the capacity of the damper chamber 103 is minimum. <P>COPYRIGHT: (C)2013,JPO&INPIT |
