| 摘要 |
A dodge plunger, a nozzle spring and a needle valve are received in a main body in this order toward a distal end of the body. The dodge plunger is of a hollow construction and has a pressure intake chamber and a guide hole arranged in this order toward the needle valve. A central plunger is slidably received in the guide hole of the dodge plunger. One end of the central plunger is faced with the pressure intake chamber. The central plunger projects from the dodge plunger toward the needle valve and is received in the nozzle spring. After the pilot injection is started as a result of lifting of the needle valve, the dodge plunger is lifted. As a consequence, a fuel pressure is introduced into the pressure intake chamber via a secondary valve seat. The central plunger is biased by the received fuel pressure and urges the needle valve toward the main valve seat.
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