NOZZLE FOR TWO-STAGE FUEL INJECTION INTO INTERNAL COMBUSTION ENGINE Russian patent published in 1994 - IPC

FIELD: engine engineering. SUBSTANCE: nozzle has closed sprayer 6 whose needle 8 is spring-loaded by spring 4 and positioned coaxially to sleeve 9 having precision conjugation with needle 8 and case 1 of sprayer 6. There are stops for arresting movements of needle 8 and sleeve 9 in the direction of spring 4. Magnitude of sleeve 9 stroke is less than magnitude of needle stroke. A stop of maximum displacement of needle 8 is positioned on sleeve 9. . The needle is provided with cylindric collar 12 which is coaxial to the needle. Outer diameter of the collar is less than diameter of conjugation of sleeve 9 with case 1 of sprayer 6. EFFECT: enhanced quality of spraying. 5 cl, 4 dwg