NOZZLE FOR DIESEL ENGINE Russian patent published in 1998 - IPC

FIELD: mechanical engineering; diesel engine fuel systems. SUBSTANCE: nozzle has hollow body with fuel feed and fuel drain channel, hollow spray tip with nozzle orifices, shutoff needle spring loaded through spindle and arranged in spray tip body space with ring clearance between cylindrical guide portion of needle and inner surface of spray tip, and resilient member made of elastomer. Spindle has inner space accommodating a rod installed with radial clearance. Resilient member is arranged in radial clearance and is rigidly coupled with surface of rod and inner surface of spindle space, with clearance left between end face surface of rod and bottom surface of spindle space. Outer surface of rod and inner surface of spindle space can be made in form of truncated cone. Outer surface of rod and inner surface of spindle space can be made stepped. EFFECT: optimization of injection process, enhanced reliability and increased service life of nozzle, enhanced stability of regulation of injection commencement pressure. 3 cl, 3 dwg