Self-excited oscillation atomizing nozzle for oil injector of diesel engine

The invention relates to a fuel nozzle of a diesel engine. The fuel nozzle comprises a needle valve body, wherein an upper nozzle hole is formed in the conical top end of the inner cavity of the needle valve body; the top end outside the needle valve body is a section; the section is in sealed and fixed connection with a self-excited oscillation nozzle; the upper nozzle hole is communicated with an oscillation cavity and a lower injection hole of the self-excited oscillation nozzle; the oscillation cavity is an empty cylindrical cavity; the lower injection hole is a conical injection hole expanding outwardly; the diameter of the oscillation cavity is 1.5-8.8 times of that of the upper nozzle hole; the length of the oscillation cavity is 2-3 times of the diameter of the upper nozzle hole; the diameter of the inner hole of the lower injection hole is 1-2 times of that of the upper nozzle hole 7; the length of the lower injection hole is 2 times of the diameter of the inner hole of the lower injection hole; and