SU1513170A1 - Diesel fuel injector nozzle - Google Patents

Abstract

The invention relates to the field of engine-building and makes it possible to increase reliability by reducing the shock loads on the locking part. In the hollow body 1 of the atomizer with a channel 2 for supplying fuel, there is a shut-off needle made with a guide 4, a carrier 5 and a locking 6 parts with the formation of a podgolnaya 7 and a nadygolny 8 cavities, and the carrier part 5 is made in the form of a spring element on which there are screw grooves 9. When the locking needle is seated, the carrier part 5 is subjected to compression and torsion deformations, as a result of which the shock loads on the locking part 6 are reduced. 2 Il.

Description

cl

The invention relates to engine building and is intended for diesel engine fuel equipment.

The aim of the invention is to increase the reliability and durability of the operation of the sprayer by reducing the shock loads on the stop part.

FIG. 1 shows a spray gun, a longitudinal section; in fig. 2 is a section A-A in FIG. one.

The atomizer contains a hollow body 1 with a channel 2 for supplying fuel and nozzle openings 3 and a locking needle, made with a guide 4, a floor 5 and a locking 6 parts and stirring in the cavity of the body 1 with the formation of podigolnaya 7 and supracigular 8 cavities The carrier part 5 is made in the form of a spring element, on which helical grooves 9 are made, and the pre-cavity 7 is in communication with the fuel supply channel 2. The longitudinal rigidity of the carrier part 5 is 0.2-0.3 of the longitudinal stiffness of the conventional cylinder with a diameter d equal to the diameter of its outer surface.

The nozzle works as follows.

The fuel through channel 2 is fed into cavity 7 and, when pressure in it is equal to the pressure of the start of injection, the locking needle, loaded from the nadygol cavity 8 by a spring (not shown), rises. In this case, the locking part 6 moves away from the saddle of the body 1 and the fuel through the formed hardening; comes to nozzle

openings m 3. Injection occurs. When the fuel supply is cut off, the locking needle is lowered by the force of the spring, the locking part 6 sits on the seat of the body 1,

blocking the access of fuel to the holes 3. In this case, the carrier part 5 is subjected to compression and torsion deformations under the action of the kinetic energy of the moving parts of the locking needle and spring, as a result of which shock loads on the locking part 6 are reduced, which increases the reliability and durability of the sprayer. In addition, due to the deformations of the torsion, the interlocking of the locking surfaces is carried out, thus maintaining the high tightness of the sprayer during operation.

Claims (1)

Invention Formula A diesel nozzle atomizer comprising a hollow body with a fuel supply channel and nozzle openings and a locking needle made with a guide, carrier and locking parts and placed in the cavity of the body with the formation of the sub-pitching and nadgyol cavity, the carrier part being made in the form of a spring element with grooves, and the sub-cavity cavity is in communication with the fuel supply channel, characterized in that, in order to increase reliability and durability of the sprayer by reducing shock loads on the locking part; the notches on the spring element are made in the form of a helical groove.