| 摘要 |
<p>The present invention relates to a two-stage fuel injection valve. The two-stage fuel injection valve of the present invention is configured such that the pressure of main fuel delivered from an injection pump is applied to a plunger (400) in a main fuel chamber (206), and subsequently delivered to an ancillary fuel pressure chamber (302) via the plunger (400) so as to compress ancillary fuel, such that a needle (400) is retracted in a manner similar to those of slide valves by means of the pressure of the ancillary fuel so as to open an ancillary fuel nozzle hole (204) and inject the ancillary fuel, and a main fuel nozzle hole (202) is opened after the injection of the ancillary fuel so as to inject the main fuel, thereby conducting two-stage fuel injection. In addition, main fuel paths (110, 210), ancillary fuel paths (120, 220, 230), and nozzle holes (202, 204) are arranged into a dual structure in one body (100a) so as to enable the injection of two types of fuels.</p> |
