FIELD: engine engineering. SUBSTANCE: fuel nozzle has selectively opened nozzle 10 through which fuel is fed to the combustion chamber of an engine. Nozzle 10 includes opening 12 provided with inner ring surface 13, valve member 20 provided with outer ring surface that is coaxial to the inner ring surface. The ring surfaces are so shaped that when the inner and outer ring surfaces are in a tight contact with each other, the nozzle being closed, the maximum width of passage 17 between the surfaces does not exceed 40 micrometers, preferably does not exceed 20 micrometers, in the direction perpendicular to the surfaces. EFFECT: improved design. 8 cl, 4 dwg
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