| 摘要 |
A fuel injection valve which is adapted to carry out fuel injection in a double-step manner such that lifting of the nozzle needle through the initial injection stroke causes contraction of a first nozzle spring and subsequent lifting of the nozzle needle through the main injection stroke causes contraction of a second nozzle spring as well as the first nozzle spring. A spacer is removably fitted in an end face of the nozzle holder remote from the nozzle and has its inner end face urgingly engaging the first nozzle spring supported by a first movable spring seat, with a setting load adjusting shim interposed between the spacer and the first nozzle spring. The spacer is retained in place by a hollow threaded member screwed in the nozzle holder. A second movable spring seat supporting the second nozzle spring in the hollow threaded member is partly fitted through the spacer and faces the first movable spring seat with an initial injection lift gap provided therebetween, which can be adjusted by a shim interposed between the spacer and the second movable spring seat.
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