WO2024111940A1

WO2024111940A1 - Fuel atomization device

Info

Publication number: WO2024111940A1
Application number: PCT/KR2023/017398
Authority: WO
Inventors: 이헌주
Original assignee: 주식회사 슈펜테크
Priority date: 2022-11-21
Filing date: 2023-11-02
Publication date: 2024-05-30
Also published as: KR102551956B1; KR102605927B1

Abstract

A fuel atomization device according to the present invention is characterized by comprising: a second coupling portion coupled to a first coupling portion formed on an air bleeder tube or a vaporizer body portion; a first through hole formed toward the air bleeder tube and having a diameter larger than a diameter of an outlet portion; a second through hole that communicates with the first through hole, has the same diameter as the outlet portion, and is connected in communication with an outlet portion of a jet nozzle; a step formed by a difference in diameter between the first and second through holes or by separate processing; spacers which are sequentially stacked on the step and have a third through hole in the center thereof having the same diameter as the outlet portion; a mesh disposed between the spacers; and a fixing means for fixing the stacked mesh and spacers.

Description

fuel atomization device

The present invention relates to a fuel atomization device, and more specifically, to a fuel atomization device that is mounted on a carburetor or injector to improve fuel efficiency and reduce exhaust emissions.

Gasoline engines, which generate power by burning the fuel/air mixture supplied into the cylinder, use a carburetor or injector to generate the fuel/air mixture, while diesel engines use injectors. .

Most automobile engines use the injector method, but small engines used in motorcycles, lawn mowers, agricultural lawn mowers, etc. still often use the carburetor method.

The carburetor method has the advantage of being cheaper than the injector method, has high output, and is simple in structure, making it easy to repair. However, it has the disadvantage of poor fuel efficiency and poor starting in winter.

To solve this problem, it is necessary to further refine and homogenize the fuel particles in the fuel/air mixture when mixing fuel and air in an engine equipped with a carburetor.

Figure 1 shows a conventional vaporizer. When the throttle valve (10) is closed (during idling operation), the pilot jet unit (100) generates a fuel/air mixture, and when the throttle valve (10) is open, the pilot jet unit (100) generates a fuel/air mixture. ) or alone in the main jet unit 200 to generate a fuel/air mixture. The generated fuel/air mixture is supplied to the combustion chamber of the engine through the venturi unit (20). The amount of fuel/air mixture supplied by the main jet unit 200 is controlled by the degree of opening of the throttle valve 10 and the degree of insertion of the needle 30.

The main jet unit 200 receives fuel from a float chamber 40 in which liquid fuel is stored, and a jet nozzle 210 for the main jet unit atomizes the fuel supplied from the float chamber 40. ) and an air bleeder tube (Air Bleeder Tube, 220) for the main jet that mixes the air supplied through the air supply line with the atomized fuel.

Typically, the main jet part is used by combining a separately manufactured jet nozzle and an air bleeder tube, and the pilot jet part is often manufactured as one piece.

Since the main jet unit 200 and the pilot jet unit 100 have similar structures and operational relationships, this application mainly describes the main jet unit, and does not specifically distinguish between the main jet unit and the pilot jet unit in terms of common configuration and terminology. do.

Depending on the type of carburetor, the liquid fuel is not atomized at the jet nozzle but is emulsified with the air flowing in from the air bleeder tube, that is, forming a fuel/air mixture in which air particles are included in the liquid fuel. Although there is a type that does this, the present invention relates to a vaporizer in which liquid fuel is atomized by a jet nozzle to form a fuel/air mixture in the form of fuel distributed in the air in the form of particles, and a vaporizer that emulsifies the fuel with air. The principles and technical ideas are different.

The present applicant, through Republic of Korea Patent No. 10-2013221, has disclosed: a float chamber in which liquid fuel is stored; An inlet whose inlet is immersed in the liquid fuel in the float chamber, a small diameter portion through which the liquid fuel flowing in from the inlet portion has a smaller diameter than the inlet portion, and a diameter larger than the small diameter portion through which the liquid fuel flowing from the small diameter portion is atomized. A jet nozzle consisting of an outlet provided with; an air bleeder tube connected to the jet nozzle, mixing atomized fuel with external air through the jet nozzle and supplying it to the venturi unit; In the vaporizer comprising: 2 to 10 first meshes are stacked on the outlet portion from the small diameter side, and then 1 to 2 second meshes with a mesh number larger than the first mesh are further added in the same stacking direction. A vaporizer characterized by lamination has been disclosed.

In the above-mentioned registered patent of the applicant, a net must be stacked on the outlet part of the jet nozzle, but the size of the outlet part is very small, such as only about 3.5 mm, making it difficult to assemble the net at regular intervals and at right angles to the flow direction. There was a problem.

The purpose of the present invention is to provide a fuel atomization device that is attached to a conventional carburetor and injector and can improve fuel efficiency and reduce exhaust emissions by refining fuel particles.

Another object of the present invention is to provide a fuel atomization device that is easy to assemble and produce, and can be easily mounted on carburetors and injectors.

The fuel atomization device of the present invention, which was devised to achieve the above object,

a float chamber in which liquid fuel is stored;

An inlet whose inlet is immersed in the liquid fuel in the float chamber, a small diameter portion through which the liquid fuel flowing in from the inlet portion has a smaller diameter than the inlet portion, and a diameter larger than the small diameter portion through which the liquid fuel flowing from the small diameter portion is atomized. A jet nozzle consisting of an outlet provided with;

an air bleeder tube connected to a jet nozzle to mix atomized fuel with external air and supply it to the venturi unit;

a vaporizer main body in which the float chamber, jet nozzle, and air bleeder tube are installed; In a fuel atomization device attached to a vaporizer comprising:

a second coupling portion coupled to the first coupling portion formed on the air bleeder tube or the vaporizer body;

a first through hole formed on the air bleeder tube side and having a diameter larger than the diameter of the outlet;

a second through hole that communicates with the first through hole, has the same diameter as the outlet portion, and is connected in communication with the outlet portion of the jet nozzle;

A step formed by a difference in diameter between the first and second through holes or by separate processing,

A plurality of spacers sequentially stacked on the step and having a third through hole at the center having the same diameter as the outlet portion,

A plurality of nets disposed between the spacers,

It is characterized by consisting of a fixing means for fixing the laminated mesh and spacers.

The jet nozzle preferably has a third coupling portion screwed to the first coupling portion.

The fuel atomization device includes a fourth through hole connected to the second through hole, and a fourth coupling portion machined into the fourth through hole,

It is also preferable that the third coupling portion of the jet nozzle is screwed to the fourth coupling portion.

The fuel atomization device of the present invention is a fuel atomization device attached to an injector having an injection port at the tip of the nozzle that injects fuel in the longitudinal direction of the injector,

a first through hole in which a mesh and a spacer are stacked and open to the injector; a second coupling portion to be coupled to the first coupling portion formed on the injector nozzle; a second through hole communicated with the first through hole and open to the outside; a step for positioning the mesh and spacer within the first through hole; With laminated mesh and spacers; It is characterized by being carried out.

The fuel atomization device of the present invention is a fuel atomization device attached to an injector having a plurality of injection holes on the inclined side of the tip of the nozzle,

a second coupling portion to be coupled to the first coupling portion formed on the injector nozzle; an upper frame having an upper mounting portion for mounting one end of a plurality of meshes and a plurality of upper spacers; a lower frame including a lower mounting portion that mounts another end of a plurality of meshes and a plurality of lower spacers; a plurality of nets arranged in an inclined cone shape between the upper mounting portion and the lower mounting portion and spaced apart by upper and lower spacers; upper and lower spacers; A support connecting the upper and lower frames; It is characterized by being carried out.

It is preferable that the angle of the edge of the cross section of the wire forming the mesh toward the side into which fuel flows is within 60 degrees.

The rear end extending from the surface forming the corner is preferably made of a surface parallel to the direction of fuel flow.

It is preferable that the cross section of the wire forming the mesh is a regular polygon within an octagon.

When the cross-section of the wire forming the mesh is circular, it is desirable to form a plurality of dimples or protrusions on its surface.

The stacking interval of the mesh is preferably 2 to 20 times the mesh space.

In a fuel atomization device attached to an injector having an injection port at the tip of the nozzle that injects fuel in the longitudinal direction of the injector,

a plurality of nets stacked to finely refine the fuel by impact scattering generated when the fuel injected from the injection hole collides;

a plurality of spacers inserted between the stacked meshes to space them apart;

a first through hole in which the mesh and spacers are stacked and open toward the injector;

a second coupling portion formed inside the first through hole to be coupled to the first coupling portion formed on the outside of the injector nozzle;

a second through hole communicated with the first through hole and open to the outside;

As a step for positioning the mesh and spacer within the first through hole; It is characterized by being carried out.

In a fuel atomization device attached to an injector having a plurality of injection holes on the inclined side of the nozzle tip,

According to the present invention having the above configuration, it is possible to refine and homogenize fuel particles to improve fuel efficiency and reduce exhaust emissions, and is also easy to assemble and produce, and can be easily installed on carburetors and injectors. .

1 is a diagram showing the structure of a conventional vaporizer.

Figure 2 is a diagram showing the structure of the applicant's conventional vaporizer.

Figures 3 to 6 show embodiments according to the present invention.

Figures 7 and 8 show several examples of the cross-sectional shape of the mesh of the present invention.

Figure 9 is a plan view showing the form of the spacer of the present invention.

Figure 10 is a diagram showing another embodiment of the present invention.

Figure 11 is a diagram showing another embodiment of the present invention.

--* Explanation of symbols *--

1: Carburetor 10: Throttle valve 20: Venturi unit 30: Needle

40: float chamber 50: vaporizer main body 100: pilot jet portion

200: main jet part 210: jet nozzle 213: outlet part

220: Air bleeder tube 231: First coupling portion 232: First through hole

233: second through hole 234: step 235: third coupling portion 236: fourth through hole

237: fourth coupling portion 238: fifth through hole

300: Mesh 400: Fuel atomization device 410: Upper frame

Hereinafter, the present invention will be described in more detail with reference to the drawings according to embodiments thereof.

3 to 6 are diagrams for explaining a fuel atomization device according to various embodiments of the present invention.

The jet part that sucks and atomizes fuel to create a fuel/air mixture to be supplied to the venturi part 20 of the carburetor 1 is composed of a jet nozzle 210 and an air bleeder tube 220, and is a fuel atomization device. (400) is disposed between the jet nozzle 210 and the air bleeder tube 220.

In this description, the main jet unit 200 is explained as an example, but of course, it can also be applied to the pilot jet unit.

The fuel atomization device 400 of FIGS. 3 to 6 has a first through hole 232 formed toward the air bleeder tube and has an inner diameter larger than that of the outlet 213, and communicates with the first through hole 232. It has the same inner diameter as the outlet portion 213 and is provided with a second through hole 233 formed on the jet nozzle side, and one end of the second through hole 233 is connected to one end of the outlet portion 213 of the jet nozzle 210. It will happen.

Since the first through hole 232 and the second through hole 233 are arranged to communicate with each other, a step 234 is formed between the first through hole 232 and the second through hole 233 due to the difference in their inner diameters.

The step may also be formed through separate processing within the first through hole.

A spacer 500 having a third through hole 510 having the same diameter as the outlet portion 213 is supported on the step 234 and stacked on the first through hole 232.

The mesh 300 and the spacer 500 are alternately stacked on the upper side of the spacer 500 supported on the step 234.

When the laminated spacer 500 and the mesh 300 are assembled, the inner surface of the air bleeder tube 220 serves as a fixing means as shown in FIG. 3, so that the position can be fixed. Alternatively, a fixing means may be provided in the form of attaching the uppermost spacer or net to the first through hole by welding or adhesive.

The size of the spacer or mesh may be slightly larger than the first through hole, and a fixing means may be adopted to insert and secure the spacer or mesh into the first through hole in an interference fit.

Instead of a spacer at the top, a fixing means may be provided in the form of a screw having a through hole in the center coupled to the first through hole 232.

The fuel particles atomized in the jet nozzle 210 pass through the outlet 213 and the second through hole 233. The fuel particles collide with the wire of the mesh 300 of the first through hole 232 and are split to finer size. do.

This fuel atomization device 400 has a second coupling portion 431 that is screwed to the first coupling portion 231 formed inside the air bleeder tube 220 and is mounted on the air bleeder tube.

In this embodiment, the jet nozzle 210 also has a third coupling part 235 coupled to the first coupling part 231.

In the embodiment of FIG. 3, the first coupling portion 231 and the second coupling portion 431 are described as being screwed together, but the first coupling portion 231 and the second coupling portion 233 have through holes of the same diameter. It may be processed into a cylinder and joined in a fitting form. It goes without saying that the fitted fuel atomizing device can have its position fixed by the jet nozzle. The method of joining the first and second coupling parts is not limited to screw coupling or fitting coupling.

In the embodiment of FIG. 4, a fourth through hole 236 is provided that communicates from the second through hole 233 of the fuel atomization device 400 in the opposite direction to the first through hole 232, and the fourth through hole 236 has a fourth through hole 236. 4 coupling portions 237 are provided.

The embodiment of FIG. 4 is different from the embodiment of FIG. 3 in that the third coupling part 235 of the jet nozzle 210 is screwed to the fourth coupling part 237.

The embodiment of FIG. 5 is different from the embodiment of FIG. 4 in that the second coupling portion 431 of the fuel atomization device is coupled to the first coupling portion 231 formed in the carburetor main body 50 rather than the air bleeder tube. There is a difference.

In the embodiment of FIG. 6, the second coupling portion 431 of the fuel atomization device is formed in the fifth through hole 238 in communication with the first through hole 232, and the first through hole 238 is formed on the outside of the air bleeder tube 220. It is different from Figure 4 in that it is screwed to the coupling portion 231.

In the above embodiments, the outlet 213 of the jet nozzle 210 is connected to the second through hole 233, and the fuel passing through the second through hole 233 is connected to the mesh 300 disposed in the first through hole 232. ) and becomes more refined.

All fuel discharged from the outlet 213 of the jet nozzle 210 is atomized fuel.

It is preferable that the cross-sectional angle of the wire forming the mesh 300 (θ, see FIG. 7) toward the side through which fuel flows is within 60°. If the angle θ of the corner is 60° or more, not only does the flow speed of the atomized fuel slow down, but also a problem occurs in which fuel particles become coarse by colliding with fuel particles branching from adjacent wires.

In addition, the rear end extending from the surface forming the corner is preferably formed along the fuel flow direction just before the mesh.

Accordingly, the atomized fuel hits the surface forming the corner, becomes finer, branches out, and flows downstream. The branched flows at the rear end can be prevented from coming together again, and the rigidity of the wire can also be increased.

Meanwhile, it is also preferable that the cross-sectional shape of the wire is one of a regular polygon within an octagon. As shown in FIGS. 8(a) to 8(e), the corners of each regular polygon are placed on the side where fuel flows.

Although not shown, when the cross-section of the wire forming the mesh is circular, forming a plurality of dimples or protrusions on the surface can prevent recombination of fuel flowing along the surface of the wire. Such dimples or protrusions can be formed by corroding the surface of the wire or spraying a separate material onto it.

Each mesh is maintained at a stacking interval by a spacer, and the stacking spacing is preferably 2 to 20 times the mesh spacing.

If the stacking interval is less than 2 times the spacing, it is difficult to prevent a liquid film from forming between the meshes, and if it is more than 20 times the spacing, there is a problem in that the size of the device increases.

Another embodiment of the present invention equipped with 3 to 5 nets with mesh numbers ranging from #50 to #200. An exhaust smoke test was performed on an agricultural manager equipped with a fuel atomization device and an agricultural manager without a fuel atomization device, and Table 1 and got the same result.

The measurement results in Table 1 are the average values (ppm) obtained by measuring 3 times in 1-minute increments at the exhaust pipe 3 minutes after starting the engine.

	without atomization devicewithout atomization device		with atomization devicewith atomization device
	#1#One	#2#2	#3#3	#4#4	#5#5
HCHC	358358	362362	166166	274274	223223
COC.O.	4.544.54	4.364.36	3.273.27	4.324.32	3.553.55
CO₂ _CO2	6.096.09	6.446.44	6.886.88	6.236.23	6.86.8
O₂ O ₂	5.375.37	6.386.38	5.855.85	4.664.66	5.625.62

As shown in Table 1, when the fuel atomization device of the present invention is used, HC and CO are reduced by about 24 to 54%, thereby reducing exhaust emissions.

Table 2 shows the fuel efficiency test results measured while running the engine at 3450 ± 50 RPM for a certain period of time.

	without atomization devicewithout atomization device		with atomization devicewith atomization device
	#1#One	#2#2	#3#3	#4#4	#5#5
소모연료량Fuel consumption	- -	231231	207207	222222	218218

When the fuel atomization device of the present invention is used, fuel efficiency is improved by 3.8 to 10.4%. Meanwhile, treating the surface of the mesh with oil-repellent treatment by etching or coating is more advantageous for fuel particles to collide and become finer, and also prevents the mesh eyes from being clogged by fuel.

The fuel injected from the nozzle collides with the mesh, causing impact scattering, and this impact scattering further refines the fuel particles. When multiple meshes are installed, impact scattering also occurs in multiple stages, so the fuel particles become even finer. Additionally, when an oil film is formed on the mesh, the impact is alleviated and the refinement of fuel particles is inhibited. To prevent this, it is necessary to separate the overlapping meshes.

This same principle can also be applied to injectors.

The injector nozzle through which fuel is injected from the injector is provided with an injection port 611 for injecting fuel in the longitudinal direction of the injector at the tip of the injector nozzle 610, as shown in FIG. 10(a), and the injector nozzle as shown in FIG. 11(a). (610) There is a form provided with a plurality of injection holes 611 on the inclined side of the tip.

In the case of the injector nozzle 610 as shown in FIG. 10(a), the first through hole 232 in which the mesh 300 and the spacer 500 are stacked is coupled to the first coupling portion 231 formed in the injector nozzle. The fuel atomization device 400 consisting of the second coupling portion 431 may be installed as shown in FIGS. 10(b) and 10(c).

The first through hole 232 of the fuel atomization device is open toward the injector and communicates with the second through hole 233 open in the direction in which fuel particles are injected. The mesh 300 and the spacer 500 are stacked on the step 234 formed by the difference in inner diameters of the first and second through

holes

232 and 233.

Fuel particles injected from the injection port 611 of the injector nozzle are refined as they pass through the mesh of the first through hole 232.

When the fuel atomization device is injected at a certain angle with the tip direction by a plurality of injection holes 611 machined on the inclined side of the injector nozzle 610 as shown in FIG. 11(a), the fuel atomization device has a different shape from that in FIG. 10(a). will be provided.

As shown in Figure 11 (b) (c), the fuel atomization device 400 is provided with a second coupling portion 431 to be coupled to the first coupling portion 231 formed on the injector nozzle 610 and a mesh ( An upper frame 410 having one end of 300-1, 300-2) and an upper mounting portion 411 for mounting upper spacers 500-1, 500-3, and 500-5; a lower frame 420 having a lower mounting portion 421 for mounting the other end of the net (300-1, 300-2) and lower spacers (500-2, 500-4, 500-6); A plurality of meshes 300-1 and 300-2 are arranged in a slanted cone shape between the upper mounting part 411 and the lower mounting part 421 and are spaced apart by the upper and lower spacers 500-1 to 6. )class; Upper and lower spacers (500-1 to 6); With a support 440 connecting the upper and lower frames; It comes true.

Accordingly, the fuel particles injected through the injection hole 611 on the inclined side of the injector nozzle pass through the mesh and become finer.

The support 400 prevents the mesh 300-1,300-2 from being deformed by the injection pressure of fuel particles. When the number of injection holes 611 of the injector nozzle 610 is large, the number of injection holes 611 of the injector nozzle 610 is increased at equal intervals. It is desirable to increase it.

It is preferable that the inclination angle of the inclined side of the injector nozzle 610 and the inclination angle formed by the meshes 300-1 and 300-2 are the same.

mesh (300-1, 300-2); The upper and lower spacers 500-1 to 6 are thin and capable of elastic deformation, and can be inserted into the upper hole of the upper frame 410.

The present invention relates to a fuel atomization device installed on an engine carburetor or injector to improve fuel efficiency and reduce exhaust emissions.

Claims

An inlet whose inlet is immersed in the liquid fuel in the float chamber, a small diameter portion through which the liquid fuel flowing in from the inlet portion has a smaller diameter than the inlet portion, and a diameter larger than the small diameter portion through which the liquid fuel flowing from the small diameter portion is atomized. A jet nozzle consisting of an outlet provided with;

an air bleeder tube connected to a jet nozzle to mix atomized fuel with external air and supply it to the venturi unit;

a vaporizer main body in which the float chamber, jet nozzle, and air bleeder tube are installed; In a fuel atomization device attached to a vaporizer comprising:

A second coupling portion coupled to the first coupling portion formed on the air bleeder tube or the vaporizer main body, a first through hole formed toward the air bleeder tube and having a diameter larger than the diameter of the outlet portion, and communicating with the first through hole. A second through hole having the same diameter as the outlet and connected in communication with the outlet of the jet nozzle, a step formed by a diameter difference between the first and second through holes or through separate processing, and a step are sequentially stacked on the step, Fuel, characterized in that it consists of a plurality of spacers having a third through hole at the center having the same diameter as the outlet, a plurality of nets disposed between the spacers, and a fixing means for fixing the stacked nets and spacers. Atomization device.
According to claim 1,

The jet nozzle is a fuel atomization device characterized in that it has a third coupling portion screwed to the first coupling portion.
According to claim 1,

The fuel atomization device includes a fourth through hole connected to the second through hole, and a fourth coupling portion machined into the fourth through hole,

A fuel atomization device, characterized in that the third coupling portion of the jet nozzle is screwed together with the fourth coupling portion.
According to claim 1,

A fuel atomization device, characterized in that the angle of the edge of the cross section of the wire forming the mesh toward the side into which fuel flows is within 60 degrees.
According to claim 4,

A fuel atomization device, characterized in that the rear end extending from the surface forming the corner is made of a surface parallel to the flow direction of the fuel.
According to claim 1,

A fuel atomization device, characterized in that the cross section of the wire forming the mesh is a regular polygon within an octagon.
According to claim 1,

A fuel atomization device characterized in that, when the cross-section of the wire forming the mesh is circular, a plurality of dimples or protrusions are formed on the surface.
According to claim 1,

A fuel atomization device, characterized in that the stacking interval of the mesh is 2 to 20 times the mesh spacing.
In a fuel atomization device attached to an injector having an injection port at the tip of the nozzle that injects fuel in the longitudinal direction of the injector,

a plurality of nets stacked to finely refine the fuel by impact scattering generated when the fuel injected from the injection hole collides;

a plurality of spacers inserted between the stacked meshes to space them apart;

a first through hole in which the mesh and spacers are stacked and open toward the injector;

a second coupling portion formed inside the first through hole to be coupled to the first coupling portion formed on the outside of the injector nozzle;

a second through hole communicated with the first through hole and open to the outside;

As a step for positioning the mesh and spacer within the first through hole; A fuel atomization device characterized in that it is made.
In a fuel atomization device attached to an injector having a plurality of injection holes on the inclined side of the nozzle tip,

a second coupling portion to be coupled to the first coupling portion formed on the injector nozzle; an upper frame having an upper mounting portion for mounting one end of a plurality of meshes and a plurality of upper spacers; a lower frame including a lower mounting portion that mounts another end of a plurality of meshes and a plurality of lower spacers; a plurality of nets arranged in an inclined cone shape between the upper mounting portion and the lower mounting portion and spaced apart by upper and lower spacers; upper and lower spacers; A support connecting the upper and lower frames; A fuel atomization device characterized in that it is made.