SU1437558A1 - Electromechanical injector - Google Patents

Abstract

Invention m. used for fuel injection in internal combustion engines. The purpose of the invention is to increase the stability, identity and expansion of the ranges of wicking fuel feeds. The entrance cavity (P) 2 of the nozzle body 1 has upper and lower edges (K) 3 and 4, respectively, and is connected to the fuel supply line 5. The ring drain P 8 with the upper and lower shut-off K 9 and 10, respectively, is connected to the main 11 of the drain, and K 9 and 10 interact with the lower and upper bypass Q 16 and 17, respectively, the drain ®

Description

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radial bore 15 spool 12 installed in the housing. The injection unit P b is in communication with the nozzle openings of the tip 7. The radial treads 8 and 19 of the spool 12 and P 2 and b form closures. Shut-off valve K 20 P 2 interacts with its K 4 and bore 15 communicates with the axial channel 21, the distance from K 16 to K W is less than the distance from K 20 to K 4. Between P 2 and 6 are located 22 and 23 communicating with highway 1I with closed

the position of the valve through the additional radial hole 24 and the axial grooves 25 of the valve, which eliminates the ingress of fuel in the P 6. Since pressure of the fuel and gases acts only in radial directions, the tightness of the closed spool is increased. The moment it turned on the ™ nk of the spool electromagnet I3 adjusts the injection advance angle, the duration of its activation is a cyclic value that supplies fuel. 1 hp F-ly, 3 W1.

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The invention relates to fuel systems for automobile mania, preferably internal combustion engines, and is intended for use in your fuel industry.

 The purpose of the invention is to increase the stability, identity and expansion of the ranges of cyclic feeds of the toeshva. While reducing the nozzle tightness,

Figure 1 shows the nozzle design diagram; Ia fng. 2 - a constructive scheme of nozzles equipped with additional intermediate bands - fig. 3 - section aa in figure 2

The nozzle includes a housing 1 with an inlet cavity 2 with an upper 3 and an inner 4 edge. The entrance cavity 2 is connected to the fuel supply line 5. The injection cavity b communicates with the syuvic holes of the tip 7, the drain cavity 8 with the cut-off edges 9 and 10 communicate with the drain I1. The golfer 12 moves along the axis (open posterior of the spool) at the self-clearing of an elactromechanical transducer, made in the form of an electromagnet with a winding 13.

The movement of the spool 12 to the initial position (the closed position of the spool) is carried out by pressing 14 on the shoulder of the spool in the nozzle body 1. The spool 12 is equipped with a radial bore 15, filled with mm i6 i and upper 17 parapusn. edges, interacting with gfogg:

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Kami 9 and 10 of the annular drain cavity 8 of the housing 5 Forkunki.

The radial grooves {18 and 19 on the spool 52 and cavities 2 and 6 on the housing 1, respectively, are formed by the inlet 2 and injectors of 6 cavities. The shutter of the inlet cavity 2 is provided with a cut-off edge 20 interacting with the lower edge 4 of the inlet cavity 2. Radial hole The spool 15 communicates with the axial channel 21.

The distance from the lower cutting edge 16 of the zolotishka 12 to the upper edge 10 of the drain cavity 8 is less than the distance from the cutting edge 20 of the slide of the spool 12 of the input cavity 2 to the lower hromka 4 of the input cavity of the nozzle body 1

Figure 2 shows additional intermediate cavities 22 and 23 in the nozzle body 1, and on the spool 12 a radial bore 24 with axial grooves 25 for communication between the intermediate cavities 22 and 23 with the drain line 1I in the closed position of the spool 12 o.

The nozzle works as follows.

A high-pressure lump pump generates a pressure pulse, which via line 5 supplies fuel to the inlet cavity 2. In the closed position of the spool 12 (Figures 1 and 2) s the inlet cavity 2 through the radial hole in the spool, axially

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channel 21 and the radial drain hole 15 is in communication with the main line And the fuel is drained. The entrance cavity 2 is separated from the fuel injection cavity 6. In FIG. 2, the inlet and injection cavities are also separated by valves, but the inlet cavity 2 is not connected to the drain line 11.

When the electromagnet 13 is turned on, the spool 12 moves to the upper position (the open position of the spool). At the same time, the input cavity 2 is separated from the drain line 11.

The lip 16 of the spool overlaps the edge of the expansion of the cyclic feed ranges. 10 of the drain cavity 8 of the housing. For this moment of switching on the electromagnet 13, the angle of advance of injection is regulated; the duration of the inclusion of the electromagnet 13 is the magnitude of the cyclic fuel supply.

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the cutting edge, and the cutting edge 20 of the gold pin 12 passes the lower edge 4 to the entrance of the cavity 2, connects the input cavity 2 through the radial groove 18 20 to the injection cavity 6, which ensures the flow of fuel through the nozzle holes of the tip 7 into the cylinder. Moreover, the overlap of the cut-off edge 16 of the spool of the edge 10 of the drain cavity 8 of the housing is due to the fact that the distance from the edge 16 to the upper edge 10 of the drain cavity is always less than the distance from the cut-off edge 20 of the slide of the spool 12 of the entrance cavity 2 to the lower edge 4 the input cavity of the nozzle body.

2, with the open position of the spool, the edge 16 of the spool overlaps the edge 10 of the drain cavity 8 of the nozzle body, but the cut-off edge 20 of the spool 12 passes the lower edge 4 of the input cavity 2 and connects this cavity through an additional intermediate cavity 22 and the radial groove 19 of the spool, in autumn grooves 25, an additional intermediate cavity 23 with a cavity 6 of the injection. The fuel is supplied to the diesel cylinder.

In the closed position of the spool, additional intermediate cavities 22 and 23, located between the inlet cavity 2 and the injection cavity 6, are connected to the drain line through the radial hole 24 in the spool 12 and axial grooves 25, which provide a double gate between the inlet 2 and the injecting 6 cavities .

In the pauses between the injection 5 and the input cavity 2 (figure 1) communicated with the highway 11 drain fuel that

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also prevents fuel from entering the injection cavity 6.

The tightness of the closed spool 12 does not depend on the force generated by the spring 14, since the pressure of the fuel and gases in the engine cylinder acts only on the radial directions on the spool 12. Therefore, a large locking force of the spring 14 is not required, which makes it possible to create a difference between the electromagnetic force and the spring force sufficient to ensure stability, identity and

Expansion of cyclic feed ranges.

At this moment of switching on the electromagnet 13, the advance angle of injection is regulated; the duration of the inclusion of the electromagnet 13 - the value of the cyclic fuel supply.

Thus, the proposed nozzle design provides increased stability, identity, and expansion of the cyclic fuel supply ranges while maintaining airtightness.

Claims (2)

1. An electromechanical nozzle for an internal combustion engine, comprising a housing with an inlet cavity having upper and lower edges, a line connected to the inlet cavity. SHARE of fuel, nozzles, associated injection cavity, drain cavity with upper and lower edges, connected connected to the drain line and installed in the building All spool with a drain radial hole, made with the lower and upper bypass edges, interacting with the edges of the drain cavity, with inlet and injection valves cavities, the shutter of the inlet cavity is provided with a cut-off edge that interacts with the lower edge of the inlet cavity, and with an axial channel and radial grooves, which is different from the lower bypass in order to increase stability, identity and broaden the ranges of fuel supply cycles. edge radial drain the spool bore to the upper edge of the drain. the cavity is smaller than the distance from the gate shut-off edge of the spool of the entrance cavity to the lower edge of the entrance cavity. 51437558 2. The nozzle according to item I, is different from that, then it is also but is equipped with intermediate cavities located between the inlet and injection cavities, and the spool is supplied / fodBifd additional radial bore and axial slots for communication intermediate cavities with a drain line in the closed position of the valve. C / ft / S / ffffWftfAf /; Fi9.1 (rig. 3