DIESEL ENGINE NOZZLE CORRECTING SPRAY TIP Russian patent published in 1999 - IPC

FIELD: mechanical engineering; diesel engines. SUBSTANCE: device has body 1 with locking cone 3, underneedle space 4, spray holes 5 of first group and second holes 6, 7 of group, needle 2 with locking cone 11 provided with groove 12 with generatrix 13. Inlet edges 9 and 10 of at least two atomizing holes 6 and 7 of second group are arranged at different height levels relative to planes of location of limiting edges 14 and 15 of groove 12 on needle 2. In process of injection, needle 2 recedes from surface of locking cone 3, thus providing change of clearance between surfaces 11 and 13 of needle 2 and inlet edges 9 and 10 of holes 6 and 7 which predetermines values of flow coefficients of these holes depending on position of their inlet edges 9 and 10 relative to planes of location of limiting edges 14 and 15 of groove 12 on needle 2. Different versions of relative position of planes of location of limiting edges 14 and 15 and inlet edges 9 and 10 of holes 6 and 7 of second group, respectively, can be used. EFFECT: organization of rational distribution of fuel over zones of combustion chamber using inadequate correcting properties of different atomizing holes of spray tip. 6 cl, 7 dwg