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Invention Grant
US09127629B2 Fuel injection device 有权
燃油喷射装置

Fuel injection device
Abstract:
A fuel injection device (100) includes a control body (40) provided with an injection hole (44), a nozzle needle (60) that opens or closes the injection hole (44), a pressure control chamber (53) controlling a movement of the nozzle needle (60), an inflow channel (52) through which high-pressure fuel is introduced to the pressure control chamber (53), an outflow channel (54) through which the fuel from the pressure control chamber (53) is discharged, and a floating plate (70) that opens or closes the inflow channel (52). In the fuel injection device (100), the control body (40) includes a cylinder (56) defining the pressure control chamber (53) in a radial direction thereof, and an inner wall portion (56a) of the cylinder (56) includes a communication groove (57a) which causes an inflow chamber (53a) that is provided within the pressure control chamber (53) at a side of the inflow channel (52) relative to the floating plate (70), to communicate with a back pressure chamber (53b) that is provided within the pressure control chamber (53) at a side of the nozzle needle (60) relative to the floating plate (70).
Abstract(Chinese):

燃料喷射装置（100）包括设置有喷射孔（44）的控制体（40），打开或关闭喷射孔（44）的喷嘴针（60），控制运动的压力控制室 所述喷嘴针（60）的流入通道（52），将高压燃料引入所述压力控制室（53）的流入通道（52），来自所述压力控制室（53）的燃料通过所述流出通道 以及打开或关闭流入通道（52）的浮板（70）。 在燃料喷射装置（100）中，控制体（40）包括在径向上限定压力控制室（53）的气缸（56），气缸（56）的内壁部（56a） 连通槽（57a），其使得在所述压力控制室（53）内设置在所述流入通道（52）的相对于所述浮板（70）的一侧的流入室（53a）与背压 在所述压力控制室（53）内设置在所述喷嘴针（60）的相对于所述浮板（70）的一侧的室（53b）。

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