| 摘要 |
PURPOSE: A fuel injecting nozzle is provided to reduce smoke and enhance fuel efficiency by preventing the overlapped fuel spray through a 360degrees injection. CONSTITUTION: A fuel injecting nozzle forms a fuel supply passage(2) in a fuel injecting body(1) and contains a needle valve(4) elastically supported by a pressure spring(3). The pressure spring is supported by a sealed spacer(5) and the needle valve is inserted into a nozzle passage(7) with a round head portion. The round head portion is vertically separated by fuel from the nozzle passage so a round injection gap is formed. When high pressure fuel is fed to the fuel transfer passage, the fuel pushes the round head portion downward through the nozzle passage to form the round injection gap. Then, the fuel is injected from the injection gap in 360 degrees to prevent the fuel from overlapping and a complete combustion is conducted. When the fuel stops, the needle valve returns to close the nozzle passage.
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