METHOD OF MAKING SPRAY TIP FOR INTERNAL COMBUSTION ENGINE NOZZLE Russian patent published in 2001 - IPC

FIELD: mechanical engineering; fuel injection devices of diesel engines. SUBSTANCE: proposed method of spray tip making includes final operation of coaxial machining of guide hole of body and its seat. Coaxial arrangement of mated surfaces of body is provided by machining of guide hole relative to datum axis passing through centers of shutoff section of seat limited by line of characteristic diameter and guide hole section limited by its inlet edge. Only guide hole is subjected to finishing inner machining. Its axial alignment with seat of spray tip body guaranteed. EFFECT: facilitated machining providing required accuracy of relative arrangement of guide hole and conical seat of spray tip body. 2 dwg