TEST BENCH NOZZLE Russian patent published in 1997 - IPC

FIELD: mechanical engineering; testing facilities for diesel engine fuel system devices. SUBSTANCE: nozzle has body with fuel feed channels, valve unit in form of spring-loaded shutoff needle in valve body, restrictor in form of through cylindrical calibrated channel accommodating a ball, stop in the form of nut secured on valve body with ball support arranged coaxially on inner side of nut bottom. Ball support is made in the form of spherical cavity with diameter of curvature greater than and diameter of crater smaller than diameter of ball. Stop outlet channel is made in the form of row of through longitudinal channels uniformly spaced over circumference in nut bottom, but they can be made in the form of cylindrical or trapezoidal slots. Given in description of the invention are nozzle design version with screw arranged coaxially in nut bottom and ball support arranged on screw end face, and also version with ball support in form of screen fixed in through coaxial hole in nut bottom. Size of screen mesh is fixed. EFFECT: enlarged operating capabilities. 4 cl, 4 dwg