CN214366490U

CN214366490U - Oil sprayer

Info

Publication number: CN214366490U
Application number: CN202023080060.9U
Authority: CN
Inventors: 王华钰; 池博源; 张晗; 贺成群; 伍中宇
Original assignee: United Automotive Electronic Systems Co Ltd
Current assignee: United Automotive Electronic Systems Co Ltd
Priority date: 2020-12-17
Filing date: 2020-12-17
Publication date: 2021-10-08
Anticipated expiration: 2030-12-17

Abstract

The utility model provides a fuel injector, the fuel injector includes oil spout passageway and valve ball, oil spout passageway has the spout along axial one end, the valve ball is followed oil spout passageway's the axis is movably set up in the oil spout passageway, oil spout passageway is kept away from the one end of spout has the direction section, the direction section includes around a plurality of water conservancy diversion faces that oil spout passageway circumference set up, the water conservancy diversion face is followed oil spout passageway's radial outside is sunken, with form the space between the valve ball. The flow cross section is increased through the arrangement of the flow guide surface, the size constraint of the valve ball is released, and the design size of the valve ball is allowed to be reduced, so that the contact area and the contact gap are reduced, the sealing effect of the oil sprayer is increased while the sufficient flow cross section is ensured, and the problems that the flow cross section and the sealing effect cannot be considered simultaneously and the comprehensive effect is not ideal in the prior art are solved.

Description

Oil sprayer

Technical Field

The utility model relates to an internal-combustion engine technical field, in particular to sprayer.

Background

The oil injector is a solenoid valve type switch valve as a key part of a gasoline engine for air inlet channel injection. When the power is on, the needle valve of the oil injector is pulled by electromagnetic force to be opened, and the fuel oil flows through the gap between the valve ball and the valve seat; when the power is off, the electromagnetic force disappears, the needle valve is closed under the action of the spring force, and at the moment, the valve ball is attached to the valve seat to seal fuel. The control of the tightness of the injection end of the oil injector is one of key indexes influencing the emission of an engine, and the tightness of the corresponding oil injector is to be further improved along with the tightening of emission standards. Generally, a metal-to-metal rigid sealing structure between a valve ball and a valve seat is arranged at the injection end of the fuel injector, and the design of the sealing surface of the valve ball and the valve seat is a key factor influencing the sealing performance. Based on the Bo Su leaf equation, the sealing performance can be effectively improved by reducing the sealing contact area and the contact gap. The diameter of the valve ball is reduced, and the roundness of the contact surface is improved, so that the sealing performance is improved. However, referring to fig. 1, fig. 1 is a schematic structural diagram of an oil injector, most manufacturers currently select a valve ball 1 with a polyhedral structure, the polyhedral design is to increase the flow area of fuel, but the diameter of the corresponding valve ball 1 cannot be further reduced, otherwise the flow area is reduced. In addition, if the distance between the welded portion of the nozzle plate of the injector and the valve seat and the sealing surface of the valve ball 1 and the valve seat is short, the welding ability is not well treated when the nozzle plate and the valve seat are laser-welded, which may cause the deformation of the sealing surface of the valve ball 1 and the valve seat, thereby deteriorating the sealing property.

In a word, in the prior art, the problem that the oil sprayer cannot give consideration to both the flow cross section and the sealing effect and the comprehensive effect is not ideal enough exists.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a sprayer for among the solution prior art, the unable circulation cross-section and sealed effect of compromise simultaneously that the sprayer exists, the not ideal enough problem of comprehensive effect.

In order to solve the technical problem, the utility model provides a fuel injector, the fuel injector includes oil spout passageway and valve ball, oil spout passageway has the spout along axial one end, the valve ball is followed oil spout passageway's axis is movably set up in the oil spout passageway, oil spout passageway is kept away from the one end of spout has the guide section, the guide section includes around a plurality of water conservancy diversion faces that oil spout passageway circumference set up, the water conservancy diversion face is followed oil spout passageway's radial undercut, with form the space between the valve ball.

Optionally, the flow guide surface extends in an axial direction of the oil injection channel.

Optionally, the guide section further includes a plurality of guide surfaces arranged around the circumferential direction of the oil injection channel, the guide surfaces and the flow guide surfaces are sequentially distributed at intervals, and the guide surfaces are used for abutting against the valve ball so as to limit the radial displacement of the valve ball along the oil injection channel.

Optionally, the oil injection channel further comprises a sealing section connected with the guide section along the axial direction of the oil injection channel, the sealing section is located at one end of the guide section close to the nozzle, and the radial inner dimension of the sealing section is gradually reduced along the direction towards the nozzle; the sealing section is used for abutting against the valve ball so as to seal the oil injection channel.

Optionally, the oil injection channel further comprises an oil injection section connected with the sealing section along the axial direction of the oil injection channel, and the oil injection section is located at one end, close to the nozzle, of the sealing section.

Optionally, the valve ball is a sphere.

Optionally, the fuel injector further includes a valve sleeve and a valve seat, the fuel injection channel is arranged on the valve seat in a penetrating manner, and one end of the valve seat, which is far away from the nozzle, is embedded in the valve sleeve and is connected with the valve sleeve in a sealing manner.

Optionally, the fuel injector further includes a nozzle plate, the valve seat includes a valve seat main body and a boss, the boss is connected to one end of the valve seat main body close to the nozzle, the radial size of the boss is smaller than that of the valve seat main body, and the nozzle plate is sleeved on the boss and is connected to the boss in a sealing manner.

Optionally, the outer contour of the orifice plate along the radial direction of the valve seat is matched with the outer contour of the valve sleeve along the radial direction of the valve seat.

Optionally, the orifice plate is provided with at least two orifices penetrating through the orifice plate, and all the orifices are communicated with the nozzle of the oil injection channel.

Compared with the prior art, the utility model provides a pair of sprayer includes oil spout passageway and valve ball, oil spout passageway has the spout along axial one end, the valve ball is followed oil spout passageway's the axis is movably set up in the oil spout passageway, oil spout passageway is kept away from the one end of spout has the guide section, the guide section includes around a plurality of water conservancy diversion faces that oil spout passageway circumference set up, the water conservancy diversion face is followed oil spout passageway's radial outside is sunken, with form the space between the valve ball. The flow cross section is increased through the arrangement of the flow guide surface, the size constraint of the valve ball is released, and the design size of the valve ball is allowed to be reduced, so that the contact area and the contact gap are reduced, the sealing effect of the oil sprayer is increased while the sufficient flow cross section is ensured, and the problems that the flow cross section and the sealing effect cannot be considered simultaneously and the comprehensive effect is not ideal in the prior art are solved.

Drawings

Those skilled in the art will appreciate that the drawings are provided for a better understanding of the invention and do not constitute any limitation on the scope of the invention. Wherein:

FIG. 1 is a schematic illustration of a fuel injector;

FIG. 2 is a top view of a fuel injector nozzle portion according to an embodiment of the present invention;

FIG. 3 is a schematic view of section A-A of FIG. 2;

FIG. 4 is a schematic view of section B-B of FIG. 2;

fig. 5a is a schematic diagram of an arrangement scheme of a fuel injector guide section according to an embodiment of the present invention;

fig. 5b is a schematic diagram of an arrangement scheme of a fuel injector guide section according to another embodiment of the invention.

In the drawings:

1-a valve ball;

10-oil injection channel; 20-a valve ball; 30-a valve stem; 40-a valve housing; 50-a valve seat; 60-a spray orifice plate;

11-oil injection section; 12-a sealing section; 13-a guide section; 14-a flow guide surface; 15-a guide surface; 21-a first weld; 41-second weld; 51-third weld; 52-a valve seat body; 53-boss; and (61) spraying the holes.

Detailed Description

To make the objects, advantages and features of the present invention clearer, the present invention will be described in further detail with reference to the accompanying drawings and specific embodiments. It is to be noted that the drawings are in simplified form and are not to scale, but rather are provided for the purpose of facilitating and distinctly claiming the embodiments of the present invention. Further, the structures illustrated in the drawings are often part of actual structures. In particular, the drawings may have different emphasis points and may sometimes be scaled differently.

As used in this application, the singular forms "a", "an" and "the" include plural referents, the term "or" is generally employed in a sense including "and/or," the terms "a", "an" and "the" are generally employed in a sense including "at least one", the terms "at least two" and "two or more" are generally employed in a sense including "two or more", and moreover, the terms "first", "second" and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or imply that there is a number of technical features being indicated. Thus, features defined as "first", "second" and "third" may explicitly or implicitly include one or at least two of the features, "one end" and "the other end" and "proximal end" and "distal end" generally refer to the corresponding two parts, which include not only the end points, but also the terms "mounted", "connected" and "connected" should be understood broadly, e.g., as a fixed connection, as a detachable connection, or as an integral part; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. Furthermore, as used in the present application, the disposition of an element with another element generally only means that there is a connection, coupling, fit, or drive relationship between the two elements, and the connection, coupling, fit, or drive between the two elements may be direct or indirect through intermediate elements, and is not to be understood as indicating or implying any spatial relationship between the two elements, i.e., an element may be in any orientation within, outside, above, below, or to one side of another element unless the content clearly dictates otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

The utility model discloses a core thought lies in providing a sprayer for among the solution prior art, the unable circulation cross-section and sealed effect of compromise simultaneously that the sprayer exists, the not ideal enough problem of combined effect.

The following description refers to the accompanying drawings.

Referring to fig. 2-5 b, wherein fig. 2 is a top view of a fuel injector nozzle portion according to an embodiment of the present invention; FIG. 3 is a schematic view of section A-A of FIG. 2; FIG. 4 is a schematic view of section B-B of FIG. 2;

fig. 5a is a schematic diagram of an arrangement scheme of a fuel injector guide section according to an embodiment of the present invention; fig. 5b is a schematic diagram of an arrangement scheme of a fuel injector guide section according to another embodiment of the invention.

As shown in fig. 2 to 4, the present embodiment provides an injector, which includes an injection channel 10 and a valve ball 20, wherein one end of the injection channel 10 along an axial direction has a nozzle (located at a lower end of the injection channel 10 in fig. 3 and 4), the valve ball 20 is movably disposed in the injection channel 20 along an axis of the injection channel 10, one end of the injection channel 20 away from the nozzle has a guiding section 13, the guiding section includes a plurality of guiding surfaces 14 circumferentially disposed around the injection channel, and the guiding surfaces 14 are recessed outward along a radial direction of the injection channel 10 to form a gap with the valve ball 20. By the configuration, the flow section of the fuel oil is increased on the premise that other sizes of the fuel injector are not changed; the design size of the valve ball 20 is reduced while maintaining a constant flow cross-section. Based on the Bo Su leaf equation, the sealing performance can be effectively improved by reducing the sealing contact area and the contact gap. In addition, due to the arrangement of the guide surfaces 14, the design of a polyhedron arranged on the existing valve ball can be eliminated, so that the design size of the valve ball 20 can be reduced, and the sealing performance of the oil injector can be enhanced. The increase of the flow cross section on the premise of keeping the original size unchanged or the reduction of the design size of the valve ball 20 on the premise of keeping the flow cross section unchanged is beneficial to improving the comprehensive effect of the oil sprayer, and the problems that the oil sprayer cannot simultaneously consider the flow cross section and the sealing effect and the comprehensive effect is not ideal are solved.

Further, the fuel injector further comprises a valve rod 30, the valve rod 30 is fixedly connected with the valve ball 20, and the valve rod 30 is movably arranged along the axis of the fuel injection channel 10 and is used for driving the valve ball 20 to move along the axis of the fuel injection channel 10 so as to open or close the fuel injection channel. The mechanical structure and driving manner of the valve rod 30 can be reasonably arranged according to common knowledge by those skilled in the art, and will not be described in detail here. The injection process and the working principle of the injector can be reasonably set by a person skilled in the art according to common knowledge, and are not described in detail here. The valve stem 30 and the valve ball 20 may be connected by a first weld 21, or may be connected by other means, such as integral molding, etc.

Preferably, the guide surface 14 extends in the axial direction of the oil injection channel 10. The configuration is beneficial to simplifying the processing technology of the flow guide surface.

Further, with continuing reference to fig. 2 to 4, the guiding section 13 further includes a plurality of guiding surfaces 15 circumferentially disposed around the oil injection channel 10, the guiding surfaces 15 and the guiding surfaces 14 are sequentially distributed at intervals, and the guiding surfaces 15 are configured to abut against the valve ball 20 to limit a radial displacement of the valve ball 20 along the oil injection channel. So configured, make the valve ball 20 move more smoothly, increase the life of the said oil atomizer. Meanwhile, the valve ball 20 is more beneficial to being positioned at a proper position when the oil injection channel is blocked, and the sealing effect of the oil injector is further improved. The guide surface 15 may be an arc surface, or an arc surface with other shapes, or a folded surface, a flat surface, etc., and as long as the guide surface can abut against the valve ball 20 and limit the displacement of the valve ball 20 along the radial direction of the oil injection channel, the protection scope of the present application claims should be considered.

In fig. 2, the number of the guide surfaces 15 and the guide surfaces 14 is 4. Referring to fig. 5a, in an embodiment, the number of the guide surfaces 15 and the flow guiding surfaces 14 is 3; referring to fig. 5b, in another embodiment, the number of the guide surfaces 15 and the flow guiding surfaces 14 is 6. It is to be understood that the number of the guide surfaces 15 and the deflector surfaces 14 should not be limited to 3, 4 or 6; the arrangement of the guide surface 15 and the flow guide surface 14 is not limited to symmetrical or uniform arrangement; the scheme that the guide surface 15 and the guide surface 14 are sequentially distributed at intervals, the flow cross-sectional area is increased by the guide surface 14, and the motion process of the valve ball 20 is stabilized by the guide surface 15 should be considered as the protection scope of the claims of the present application.

In an embodiment, the oil injection channel 10 further includes a sealing section 12 connected to the guiding section 13 along an axial direction of the oil injection channel 10, the sealing section 12 is located at an end of the guiding section 13 close to the nozzle, and a radial inner dimension of the sealing section 12 is gradually reduced in a direction toward the nozzle; the sealing section 12 is used for abutting against the valve ball 20 to seal off the oil injection channel 10. With such a configuration, the requirement for the machining precision of the valve ball 20 can be reduced, and the valve ball 20 always finds a position during the movement towards the nozzle along the axial direction of the oil injection channel 10, so that the valve ball 20 is just completely attached to the sealing section 12, and the sealing effect is further improved. In a specific embodiment, the valve ball 20 may be provided as a sphere, and the sealing section 12 may be provided as an approximate circular table; the valve ball 20 may be provided in other shapes and the sealing section 12 may be adapted to achieve the above-described results.

Further, the oil injection channel 10 further comprises an oil injection section 11 connected with the sealing section 12 along the axial direction of the oil injection channel 10, and the oil injection section 11 is located at one end of the sealing section 12 close to the nozzle. The injection section 11 extends in the axial direction of the injection channel 10 in order to maintain a larger injection surface. With the configuration, better oil injection effect can be obtained.

In a preferred embodiment, the valve ball 20 is a sphere. The sphere refers to an isotropic complete sphere. Referring to fig. 1, a structure of a conventional fuel injector is shown, in the fuel injector shown in fig. 1, several flat surfaces are provided on the valve ball 1. The valve ball 20 of the present embodiment eliminates the design of these planes, which is beneficial to simplify the processing steps of the valve ball 20 and reduce the positioning precision required for assembling the valve ball 20 and the valve rod 30, and particularly, when the valve ball 20 and the valve rod 30 are connected, the isotropic valve ball 20 can be accurately assembled with the valve rod 30 regardless of the angle. Under the same technical conditions, the configuration can further improve the sealing effect of the fuel injector.

In one embodiment, the fuel injector further comprises a valve sleeve 40 and a valve seat 50, the fuel injection channel 10 is opened through the valve seat 50, and one end of the valve seat 50 far away from the nozzle orifice is embedded in the valve sleeve 40 and is connected with the valve sleeve 40 in a sealing mode. Further, the valve seat 50 is connected to the valve housing 40 by a second weld 41.

The fuel injector further comprises a jet orifice plate 60, the valve seat 50 comprises a valve seat main body 52 and a boss 53, the boss 53 is connected with one end, close to the jet orifice, of the valve seat main body 52, the radial size of the boss 53 is smaller than that of the valve seat main body 52, and the jet orifice plate 60 is sleeved on the boss 53 and is in sealing connection with the boss 53. Further, the orifice plate 60 and the boss 53 are connected by a third weld 51.

Preferably, the outer contour of the orifice plate 60 in the radial direction of the valve seat 50 matches the outer contour of the valve sleeve 40 in the radial direction of the valve seat 50.

With the configuration, the size of the orifice plate 60 can be enlarged as much as possible without increasing the radial size of the injector, so that the position of the third welding line 51 is far away from the nozzle, and deformation of the valve ball 20 or the sealing section 12 caused when the orifice plate 60 and the valve seat 50 are welded is avoided, thereby further increasing the sealing effect of the injector.

Preferably, the outer contour of the exposed portion of the valve seat 50 along its radial direction matches the outer contour of the valve sleeve 40 along the radial direction of the valve seat 50. The outline of the oil sprayer forms a smooth whole, so that the aesthetic degree of the oil sprayer is improved, and the oil sprayer is convenient to mount on the mounting position.

In one embodiment, the injection hole plate 60 is provided with at least two injection holes 61 penetrating through the injection hole plate 60, and all the injection holes 61 are communicated with the injection port of the oil injection channel 10. The configuration is favorable for improving the atomization effect of the sprayed fuel and subsequent combustion.

Other parts of the fuel injector not mentioned in the present embodiment may be arranged by those skilled in the art according to the actual prior art, and will not be described in detail here.

In summary, the utility model provides a pair of sprayer includes oil spout passageway 10 and valve ball 20, oil spout passageway 10 has the spout along axial one end, valve ball 20 is followed oil spout passageway 10's the axis is movably set up in oil spout passageway 10, oil spout passageway 10 is kept away from the one end of spout has guide section 13, guide section 13 includes around a plurality of water conservancy diversion faces 14 that oil spout passageway 10 circumference set up, water conservancy diversion face 14 is followed oil spout passageway 10's radial outside sunken, with form the space between the valve ball 20. The flow cross section is increased through the arrangement of the flow guide surface 14, the size constraint of the valve ball 20 is released, and the designed inner diameter of the valve ball 20 is allowed to be reduced, so that the contact area and the contact gap are reduced, the sealing effect of the oil sprayer is increased while the sufficient flow cross section is ensured, and the problems that the flow cross section and the sealing effect cannot be considered simultaneously and the comprehensive effect is not ideal in the oil sprayer in the prior art are solved.

The above description is only for the preferred embodiment of the present invention and is not intended to limit the scope of the present invention, and any modification and modification made by those skilled in the art according to the above disclosure are all within the scope of the claims.

Claims

1. The fuel injector is characterized by comprising a fuel injection channel and a valve ball, wherein a nozzle is arranged at one axial end of the fuel injection channel, the valve ball is movably arranged in the fuel injection channel along the axis of the fuel injection channel, a guide section is arranged at one end, away from the nozzle, of the fuel injection channel, the guide section comprises a plurality of guide surfaces which are circumferentially arranged around the fuel injection channel, and the guide surfaces are radially outwards sunken along the fuel injection channel and form a gap with the valve ball.

2. A fuel injector as set forth in claim 1 characterized said deflector surface extends axially of said fuel injection passage.

3. The fuel injector of claim 1, characterized in that the guide section further comprises a plurality of guide surfaces circumferentially arranged around the fuel injection passage, the guide surfaces and the deflector surfaces are sequentially spaced apart, and the guide surfaces are configured to abut against the valve ball to limit radial displacement of the valve ball along the fuel injection passage.

4. The fuel injector as set forth in claim 1, characterized in that the fuel injection passage further includes a seal section connected to the guide section in an axial direction of the fuel injection passage, the seal section being located at an end of the guide section near the nozzle hole, a radially inner dimension of the seal section being gradually reduced in a direction toward the nozzle hole; the sealing section is used for abutting against the valve ball so as to seal the oil injection channel.

5. The fuel injector of claim 4, characterized in that the fuel injection passage further includes a fuel injection section connected to the seal section in an axial direction of the fuel injection passage, the fuel injection section being located at an end of the seal section near the nozzle hole.

6. The fuel injector of claim 1, characterized in that the valve ball is a sphere.

7. The fuel injector as claimed in claim 1, characterized by further comprising a valve sleeve and a valve seat, wherein the fuel injection passage is arranged through the valve seat, and one end of the valve seat, which is far away from the nozzle, is embedded in the valve sleeve and is connected with the valve sleeve in a sealing mode.

8. The fuel injector of claim 7, characterized in that the fuel injector further comprises an orifice plate, the valve seat comprises a valve seat body and a boss, the boss is connected with one end of the valve seat body close to the nozzle, the radial dimension of the boss is smaller than that of the valve seat body, and the orifice plate is sleeved on the boss and is connected with the boss in a sealing mode.

9. The fuel injector as claimed in claim 8, characterized in that the outer contour of the orifice plate in the radial direction of the valve seat and the outer contour of the valve sleeve in the radial direction of the valve seat are matched.

10. The fuel injector as set forth in claim 8 characterized in that said orifice plate is provided with at least two orifices extending through said orifice plate, all of said orifices communicating with the outlet port of said fuel injection passage.