| 摘要 |
PROBLEM TO BE SOLVED: To provide a fuel injection device with an enhanced open/close response of a valve to a control signal from a control device.SOLUTION: A fuel injection device 100 includes inlets 52b and an outlet 54b which are opened at an opening wall surface 53b exposed to a pressure control chamber 53 formed in a control body 40, and a floating plate 70 which blocks the inlets 52b from the pressure control chamber 53 and the outlet 54b by pressing the opening wall surface 53b with a pressing surface 73 by using the pressure of the fuel where at least one out of an outlet periphery surface area 54d surrounding the outlet 54b on the opening wall surface 53b and an outlet facing surface area 74b facing the reciprocal displacement direction of the outlet periphery surface area 54d on the pressing surface 73 formes an outlet depression 74a, and where at least one out of an inlet periphery surface area 52d surrounding the inlet 52b and an inlet facing surface area 72b facing the reciprocal displacement direction to the inlet periphery surface area 52d on the pressing surface 73 forms an inlet depression 72a on the opening wall surface 53b. |
