| 摘要 |
A first fuel discharge path and a first return pipe that collectively discharge the amount of flow of fuel flowing out of the piston control chamber of a pressure intensifier built in an injector and the amount of flow of fuel flowing out of the nozzle back pressure chamber of a fuel injection nozzle (including the amount of flow of leak fuel) to a fuel tank and a second fuel discharge path and a second return pipe that discharge only the amount of flow of return fuel flowing out of the solenoid valve chamber of a solenoid valve are mounted separately from and independently of each other in terms of pipe line. With this measure, pressure in the solenoid valve chamber can be controlled to a value lower than the limit of resistance to pressure of an O-ring.
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