FUEL INJECTION DEVICE

摘要

A fuel injection device (1A) including a nozzle body (10) having injection holes (12), a needle valve (20) placed in the nozzle body, a fuel turn section (24) where fuel (FE) turns along the inner wall surface of the nozzle body, and a guide section (22) for applying turning force to the fuel to guide it to the fuel turn section, wherein the fuel turn section (24) is placed at a position where it overlaps with a part of the injection holes (12). When the needle valve is at a low lift position, the fuel turn section overlaps with a part of the injection holes to cause a fuel spray shape to be diffusion spray having a wider spray angle. Further, when the needle valve is at a high lift position, the spray shape can be changed to column-like spray having a narrow spray angle.