SPRAY TIP INTERNAL COMBUSTION ENGINE NOZZLE Russian patent published in 2001 - IPC

FIELD: mechanical engineering; diesel engine fuel injection device. SUBSTANCE: proposed nozzle spray tip has body with conical sea and needle valve placed in body and including throttling-and-shutting off cone with angle exceeding angle of seat, contacting with seat over characteristic diameter and coinciding over diameter line border with damping element installed with damping clearance relative to seat surface. Combination seat is made in form of two cones changing one into the other through step. Needle valve has single throttling-and-shutting off cone which contacts with step of seat over characteristic diameter line which limits part of throttling-and-shitting off cone from side of base this part of cone plays the part of damping element. Seat of body consisting of two stepped matching cones makes it possible to use needle valve with single cone whose damping part, over entire length of generating line, interacts through clearance with seat at maximum possible damping effect. EFFECT: provision of effective design of spray tip featuring longer service life and manufacturability. 2 cl, 2 dwg