| 摘要 |
[Object] To allow smooth discharge of a gas accumulated in a fuel injection device for injecting/supplying fuel to an engine intake passage. [Means] There is provided a fuel injection device (3A) comprising a fuel pump (31), a solenoid valve (32) for injecting pressurized fuel into the intake passage (10) of an engine (1), a high-pressure fuel passage (36) that extends from the fuel pump (31) to the solenoid valve (32) and has a medially positioned constant-pressure chamber (33A), and a fuel return passage (38) connected to a fuel return pipe (6), with the fuel return passage extending from the constant-pressure chamber (33A) and having a medially positioned priming pump (34A), wherein the constant-pressure chamber (33A) is configured so that the top wall in the upper space thereof is disposed above the opening of the high-pressure fuel passage (36) opposite from the solenoid valve (32), the fuel return passage (38) opens into the upper space at a position above the opening of the high-pressure fuel passage (36), and the gas accumulating in the constant-pressure chamber (33A) is discharged from the upper space toward the fuel tank (2) via the fuel return passage (38).
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