| 摘要 |
The conical nozzle valve seat (30) of a diesel injection nozzle (2) is shape d to form a notch (35) extending down from an annular upper notch (35) boundary on the conical bottom face/seat (30) of the valve. In the fully raised position of the valv e, the upper notch (35) boundary is above the imaginary intersection between the conical bottom face (30) of the valve and an imaginary conical surface perpendicular to the conical bott om face (30) and containing the annular entry edge of the nozzle sac. The minimum cross- sectional flow area of the valve is greater than that associated with an otherwise identica l valve that does not have such annular notching (35).
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