SU1321893A1 - Hydraulic storage atomizer - Google Patents

Abstract

The invention relates to engine building and M. b. used in diesel fuel system. The purpose of the invention is to improve the fuel feeding process. The bypass valve (PC) 11 and an electromagnet for its drive are installed in an accumulator, its capacity (AE) 2. PC I is made in the form of an elastic split ring shell made of ferromagnetic material, one end of which is rigidly fixed on the wall of AE 2 and the other interacts with an overflow channel 3. Such an implementation makes it possible, by adjusting the injection duration, to eliminate the dependence of injection pressure on the cycle supply while improving the injection end. Since PC 11 operates at low fuel pressures in AE 2, it becomes possible to use a relatively low power electromagnet. 5 il. (L 00 y oo with oo

Description

The invention relates to engine building for use in diesel fuel systems.

The aim of the invention is to improve the fuel injection process, to eliminate the dependence of injection pressure on the pump cycle.

FIG. 1 shows the nozzle, general view; in fig. 2 is a section A-A in FIG. ; in fig. 3 shows the node I in FIG. one; with a bypass with a valve seated on the socket; in fig. 4 - the same, with the valve pulled; in fig. 5 - voltage diagrams (U) at the terminals of the electromagnet control and needle lifting winding

(/ g) nozzles in time (/).

In the nozzle body 1, an accumulation cavity 2 is located, which is connected by a bypass channel 3 to the discharge line 4 and the nagulina chamber 5, and also channel 6 with the hypodermic cavity 7. The needle 8 of the atomizer 9 is loaded with a spring 10 placed in the naginal cavity 5. In the inner surface of the accumulator cavity 2 is installed control valve 11 in the form of an elastic annular shell made of ferromagnetic material, one end of which is fixed by a pin 12, and the other, having a perforated hole 13, coinciding with channel 3, is free.

In the storage cavity 2, an electromagnet is placed with a control winding 14 and a core 5, the poles of which have a gap with the inner surface of the control loianaHa 11. The magnet core 15 is insulated from the case with nitrous inserts 16, and the poles of the magnet are coated with a nonmetallic small thickness to reduce either the annular shell 11 and accordingly, reducing the duration of operation of the electromagnet.

The nozzle works as follows.

Before the pumping stroke of the fuel pump plunger (not specified), at time t {FIG. 5) a control unit (not specified) applies a voltage to the terminals of the electromagnet control winding 14. The annular valve 11 in this case is attracted to the core 15 of the electromagnet and, moving around the circumference of the valve seat, separates the accumulating cavity 2 and channel 3. In this case, the fuel pump delivers fuel along the discharge line 4 to the aspiration chamber 5 and through channel 3, squeezing inwards the accumulating cavity, the free end of the annular valve 11, into the accumulating cavity 2, and from it along the channel b - into the sub EGAL cavity 7. At the same time, the needle 8 is pressed against the saddle of the atomizer 9 due to the force of preliminary tightening of the spring 10 and the difference of forces t fuel pressure acting on it from the chamber 5 and the cavity 2.

At time 2, corresponding to the fuel pump supply cut-off, the free end of the annular cl-11 by the force of elasticity is pressed against the nest and 5 seals the accumulating cavity 2, and the fuel pressure in the naginal chamber 5 drops, which leads to a redistribution of forces acting on the needle 8, under the pressure of the fuel from the side of the armpit cavity 7, the needle 8, overcoming the force of the spring 10, rises and begins to inject the accumulated fuel.

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The duration of the injection is determined by the control unit. By time / 3, which is the optimum injection duration (T) for this mode of engine operation, it provides the winding 14 of the electromagnet, while the ring 20 valve 11, due to the elastic force, sits on its socket, connecting the accumulator cavity with hole 13 channel 3. At the same time, the battery is discharged and the injection is stopped.

Thus, such adjustment of the injection duration eliminates the dependence of the injection pressure on the cycle supply while improving the injection range. Moreover, since the valve 30 is operated at low fuel pressures in the accumulating cavity, it is possible to use a relatively low power electromagnet.

Claims (1)

Invention Formula 40 35 Hydroaccumulative, and a nozzle containing a housing with an accumulating cavity placed in it, a nebulizer with a needle loaded with a spring placed in a nagyol chamber connected through an opening to the heating line connected to the last accumulator bypass channel and the bypass control valve for separating the accumulating cavity from the injection pump and the organization of the cut-off of the fuel supply at the end of the injection, characterized in that, in order to improve the fuel supply process, the accumulating bands It is made in the form of a cid) tank, and the bypass valve is in the form of 50 inside the tank is an elastic cut-out annular shell made of ferromagnetic material, one end of which is rigidly fixed to the vessel wall and the other interacts with the overflow channel, the tank being provided with an electromagnet 55 placed inside it to drive the overflow valve whose poles are installed with a gap relative to the inner shell surfaces. At time 2, corresponding to the fuel pump supply cut-off, the free end of the annular cl-11 by the force of elasticity is pressed against the nest and seals the accumulating cavity 2, and the fuel pressure in the naginal chamber 5 drops, which leads to a redistribution of forces acting on the needle 8 under the pressure of the fuel from the side of the armpit cavity 7, the needle 8, overcoming the force of the spring 10, rises and begins to inject the accumulated fuel. Hydroaccumulative, and a nozzle containing a housing with an accumulating cavity placed in it, a nebulizer with a needle loaded with a spring placed in a nagyol chamber connected through an opening to the heating line connected to the last accumulator bypass channel and the bypass control valve for separating the accumulating cavity from the injection line and organization of fuel cut-off at the end of the injection, characterized in that, in order to improve the fuel supply process, the accumulating cavity made in the form of a cide) indrichesky capacity, and the relief valve - in the form of installed inside the tank there is an elastic cut ring annular shell made of ferromagnetic material, one end of which is rigidly fixed to the vessel wall and the other interacts with the bypass channel, the tank being provided with an electromagnet placed inside it to drive the bypass valve whose poles are installed with a gap relative to the inner surface of the shell . / 1st) FIG. 2 / J Fig.d FIG.