发明授权
- 专利标题: Fuel injection valve
- 专利标题(中): 燃油喷射阀
-
申请号: US09614908申请日: 2000-07-12
-
公开(公告)号: US06367721B1公开(公告)日: 2002-04-09
- 发明人: Masaki Ikeya , Sumito Takeda
- 申请人: Masaki Ikeya , Sumito Takeda
- 优先权: JP11-304024 19991026
- 主分类号: B05B130
- IPC分类号: B05B130
摘要:
The fuel injection valve of the present invention is constituted such that a needle valve 5 and a movable core 4 are movably disposed in an axial direction in the inside of a body 1. Here, a fixed member 8 which the movable core 4 approaches at the time of closing the valve is disposed in the body 1, and a gap is formed between the movable core 4 and the fixed member 8 at the time of closing the valve. When fuel remaining in the gap between the movable core 4 and the fixed member 8 is pressurized according to the movement of the movable core 4 to the valve closing side, a squeezing portion SB1 is disposed at a portion which constitutes a passage for the fuel extruded from the gap. At the time of closing the valve, a squeezing reaction force (reaction force against the squeezing-out force or pushing-out force generated at the time of pressurizing a liquid and squeezing a liquid through the gap) is generated on the movable core 4. Since the squeezing reaction force is increased in an inversely proportional manner to the cube of the size of the gap between the movable core 4 and the fixed member 8, even when the gap between two opposing surface (that is, the gap between the proximal end surface of the fixed member 8 and the distal end surface of the movable core 4) is small, a large squeezing reaction force is generated. Further, a braking is quickly applied to the movable core 4 and and the needle valve 5 due to this squeezing reaction force just slightly before the point of time when the valve is closed.
信息查询