Fuel injection valve
US6367721B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 12, 2000 |
| Grant date | Apr 9, 2002 |
| Priority date | — |
| Expiry date | Jul 12, 2020 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02M2200/306
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
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 e…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.