Fuel micronization device

Abstract

The fuel atomization device of the present invention is characterized by including: a second coupling part coupled to a first coupling part formed on an air bleeder tube or a carburetor main body; a first through hole formed on the air bleeder tube side and having a diameter larger than that of the outlet; a second through hole communicating with the first through hole, having the same diameter as the outlet, and communicating with and connected to the outlet of a jet nozzle; a step formed by the difference in diameter between the first and second through holes or by separate processing; spacers sequentially stacked on the step and having a third through hole in the center having the same diameter as the outlet; a plurality of meshes arranged between the spacers; and fixing means for fixing the stacked meshes and the spacer.

Description

[Technical Field]

[0001] The present invention relates to a fuel atomization device, and more particularly to a fuel atomization device that is attached to a carburetor or an injector to improve fuel economy and reduce smoke. [Background technology]

[0002] Gasoline engines, which generate power by burning a fuel / air mixture supplied into the cylinders, use a carburetor or injector to create the fuel / air mixture, while diesel engines use an injector.

[0003] In the case of automobile engines, most use the injector system, but small engines used in motorcycles, lawn mowers, agricultural management equipment, etc. still often use the carburetor system.

[0004] The carburetor system has the advantages of being cheaper than the injector system, having higher output, a simpler structure and easier repairs, but it has the disadvantages of being less fuel efficient and not starting smoothly in winter.

[0005] To solve these problems, when mixing fuel and air in a carburetor-equipped engine, the fuel particles in the fuel / air mixture need to be further refined and homogenized.

[0006] 1 shows a conventional carburetor in which a pilot jet unit 100 generates a fuel / air mixture when a throttle valve 10 is closed (during idling), and a main jet unit 200 generates a fuel / air mixture together with the pilot jet unit 100 or alone when the throttle valve 10 is open. The generated fuel / air mixture is supplied to the combustion chamber of the engine via a 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 a needle 30.

[0007] The main jet section 200 includes a jet nozzle 210 for the main jet section that receives fuel from a float chamber 40 in which liquid fuel is stored and atomizes the fuel supplied from the float chamber 40, and an air bleeder tube 220 for the main jet section that mixes air supplied via an air supply line with the atomized fuel.

[0008] Typically, the main jet portion is used by combining a jet nozzle and an air bleeder tube, which are separately manufactured, and the pilot jet portion is often manufactured as an integrated unit.

[0009] Since the main jet section 200 and the pilot jet section 100 have similar structures and operational relationships, this application will focus on the main jet section, and no distinction will be made between the main jet section and the pilot jet section in terms of common configuration and terminology.

[0010] Depending on the type of carburetor, the liquid fuel is not atomized by the jet nozzle, but is emulsified with the air flowing in from the air bleeder tube, i.e., some types form a fuel / air mixture in which air particles are contained in the liquid fuel. However, the present invention relates to a carburetor in which the liquid fuel is atomized by the jet nozzle to form a fuel / air mixture in which the fuel is distributed in particulate form in the air, and its principle and technical concept are different from those of carburetors that emulsify fuel with air.

[0011] In Korean Patent Registration No. 10-2013221, the applicant disclosed a carburetor including a float chamber in which liquid fuel is stored, an inlet portion 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 passes and which has a diameter smaller than the inlet portion, and an outlet portion through which the liquid fuel flowing in from the small diameter portion is atomized and which has a diameter larger than the small diameter portion, and an air bleeder tube connected to the jet nozzle and mixes the atomized fuel with external air through the jet nozzle and supplies it to a venturi portion, wherein 2 to 10 first meshes are stacked from the small diameter portion side in the outlet portion, and then 1 to 2 second meshes having a mesh number larger than the first meshes are further stacked in the same stacking direction.

[0012] In the applicant's registered patent, a mesh must be stacked at the outlet of the jet nozzle, but the diameter of the outlet is only about 3.5 mm, making it very small and difficult to assemble the mesh at regular intervals and perpendicular to the flow direction. Summary of the Invention [Problem to be solved by the invention]

[0013] SUMMARY OF THE INVENTION An object of the present invention is to provide a fuel atomization device that can be attached to a conventional carburetor and injector to atomize fuel particles, thereby improving fuel economy and reducing smoke.

[0014] It is yet another object of the present invention to provide a fuel atomization device that is easy to assemble and manufacture and can be easily attached to a carburetor and an injector.

[0015] In order to achieve the above object, the fuel atomization device of the present invention is a float chamber in which liquid fuel is stored; a jet nozzle including an inlet portion 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 passes and which has a diameter smaller than that of the inlet portion, and an outlet portion through which the liquid fuel flowing in from the small diameter portion is atomized and which has a diameter larger than that of the small diameter portion; an air bleeder tube connected to the jet nozzle for mixing the fuel atomized through the jet nozzle with external air and supplying the resulting mixture to the venturi section; A fuel atomization device attached to a carburetor including a carburetor body provided with the float chamber, the jet nozzle, and the air bleeder tube, a second coupling portion coupled to a first coupling portion formed on the air bleeder tube or the carburetor main body; a first through-hole formed on the air bleeder tube side and having a diameter larger than the diameter of the outflow portion; a second through-hole communicating with the first through-hole, having the same diameter as the outlet portion, and communicating with and connected to the outlet portion of the jet nozzle; a step formed by a difference in diameter between the first and second through holes or by a separate process; a plurality of spacers stacked in sequence on the step and having a third through-hole at the center thereof with the same diameter as the outlet portion; a plurality of meshes disposed between the spacers; and a fixing means for fixing the stacked meshes and spacers.

[0016] The jet nozzle preferably includes a third coupling portion that is threadably coupled to the first coupling portion.

[0017] the fuel atomization device includes a fourth through-hole connected to the second through-hole, and a fourth connecting portion machined in the fourth through-hole, It is also preferable that the third coupling portion of the jet nozzle is threadably coupled to the fourth coupling portion.

[0018] The fuel atomization device of the present invention is a fuel atomization device attached to an injector having an injection port at a nozzle tip for injecting fuel in the longitudinal direction of the injector, The injector nozzle includes a first through-hole formed by stacking a mesh and a spacer and opening toward the injector; a second coupling portion coupled to a first coupling portion formed on the injector nozzle; a second through-hole communicating with the first through-hole and opening to the outside; a step for positioning the mesh and spacer within the first through-hole; and the stacked mesh and spacer.

[0019] The fuel atomization device of the present invention is a fuel atomization device attached to an injector having a plurality of injection ports on an inclined side surface of a nozzle tip, The injector nozzle includes a second coupling part coupled to a first coupling part formed on the injector nozzle; an upper frame having an upper mounting part on which one ends of the plurality of meshes and a plurality of upper spacers are mounted; a lower frame having a lower mounting part on which the other ends of the plurality of meshes and a plurality of lower spacers are mounted; a plurality of meshes that form an inclined cone shape between the upper mounting part and the lower mounting part and are spaced apart by the upper and lower spacers; and a support connecting the upper and lower spacers and the upper and lower frames.

[0020] The angle of the cross section of the wires forming the net toward the fuel inflow side is preferably within 60 degrees.

[0021] The rear end portion extending from the angled surface preferably comprises a surface parallel to the direction of fuel flow.

[0022] The cross section of the wires forming the mesh is preferably a regular polygon of octagon or less.

[0023] When the cross section of the wires forming the net is circular, it is preferable to form a plurality of dimples or protrusions on the surface.

[0024] The stacking interval of the mesh is preferably 2 to 20 times the mesh opening.

[0025] A fuel atomization device attached to an injector having an injection port at the nozzle tip for injecting fuel in the longitudinal direction of the injector, a plurality of stacked nets for atomizing the fuel by impact scattering caused by collision of the fuel injected from the injection port; a plurality of spacers inserted between the stacked nets to space them apart; a first through hole formed by laminating the mesh and the spacer and opening to the injector side; a second coupling portion formed inside the first through-hole to be coupled with a first coupling portion formed outside the injector nozzle; a second through-hole communicating with the first through-hole and opening to the outside; The mesh and the spacer are characterized by having a step for positioning them in the first through-hole.

[0026] A fuel atomization device attached to an injector having a plurality of injection ports on the inclined side of the nozzle tip, The injector nozzle includes a second coupling part coupled to a first coupling part formed on the injector nozzle; an upper frame having an upper mounting part on which one ends of the plurality of meshes and a plurality of upper spacers are mounted; a lower frame having a lower mounting part on which the other ends of the plurality of meshes and a plurality of lower spacers are mounted; a plurality of meshes that form an inclined cone shape between the upper mounting part and the lower mounting part and are spaced apart by the upper and lower spacers; and a support connecting the upper and lower spacers and the upper and lower frames. [Effects of the Invention]

[0027] According to the present invention having the above-described configuration, fuel particles can be refined and homogenized to improve fuel efficiency and reduce soot, and it is easy to assemble and manufacture, and can be easily attached to the carburetor and injector. [Brief explanation of the drawings]

[0028] [Figure 1] FIG. 1 is a diagram showing the configuration of a conventional vaporizer. [Figure 2] 1 illustrates the applicant's conventional vaporizer structure. [Figure 3] 1 illustrates an embodiment according to the present invention. [Figure 4] 1 illustrates an embodiment according to the present invention. [Figure 5] 1 illustrates an embodiment according to the present invention. [Figure 6] 1 illustrates an embodiment according to the present invention. [Figure 7] 1A-1C illustrate various embodiments of the cross-sectional shape of the netting of the present invention. [Figure 8] 1A-1C illustrate various embodiments of the cross-sectional shape of the netting of the present invention. [Figure 9] FIG. 2 is a plan view showing the shape of a spacer of the present invention. [Figure 10] FIG. 10 illustrates another embodiment of the present invention. [Figure 11] FIG. 10 is a diagram showing yet another embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0029] The invention will now be explained in more detail with reference to the drawings according to embodiments thereof.

[0030] 3 to 6 are diagrams for explaining fuel atomization devices according to various embodiments of the present invention.

[0031] The jet section, which draws in and atomizes fuel to generate a fuel / air mixture that is supplied to the venturi section 20 of the carburetor 1, includes a jet nozzle 210 and an air bleeder tube 220, and the fuel atomization device 400 is disposed between the jet nozzle 210 and the air bleeder tube 220.

[0032] In this explanation, the main jet portion 200 will be taken as an example, but it goes without saying that the present invention can also be applied to the pilot jet portion.

[0033] The fuel atomization device 400 of Figures 3 to 6 has an inner diameter larger than the inner diameter of the outflow portion 213 and is provided with a first through hole 232 formed on the air bleeder tube side, and a second through hole 233 formed on the jet nozzle side, which is connected to the first through hole 232 and has the same inner diameter as the outflow portion 213, and one end of the second through hole 233 is connected to one end of the outflow portion 213 of the jet nozzle 210.

[0034] The first through hole 232 is arranged so as to communicate with the second through hole 233, and therefore a step 234 is formed between the first through hole 232 and the second through hole 233 due to the difference in inner diameter therebetween.

[0035] The step can be formed in the first through hole by a separate process.

[0036] A spacer 500 having a third through-hole 510 with the same diameter as the outflow portion 213 is supported by the step 234 and stacked in the first through-hole 232 .

[0037] On the upper side of the spacers 500 supported by the steps 234, the nets 300 and the spacers 500 are stacked alternately.

[0038] When the stacked spacers 500 and mesh 300 are assembled, the inner surface of the air bleeder tube 220 functions as a fixing means, as shown in Fig. 3, so that the positions of the stacked spacers 500 and mesh 300 can be fixed. Alternatively, fixing means can be provided by bonding the uppermost spacer or mesh to the first through-hole with welding or an adhesive.

[0039] It is also possible to employ a fixing means in which the size of the spacer or net is made slightly larger than the first through-hole, and the spacer or net is inserted into the first through-hole in a forced fit state to fix it.

[0040] Instead of the spacer at the top, a fixing means may be provided in the form of a screw with a through hole in the center that is connected to the first through hole 232.

[0041] The fuel particles atomized by the jet nozzle 210 pass through the outlet 213 and the second through-holes 233, where they collide with the wires of the mesh 300 of the first through-holes 232, break up, and become finer in size.

[0042] The fuel atomization device 400 has a second coupling part 431 that is screw-coupled to the first coupling part 231 formed inside the air bleeder tube 220, and is attached to the air bleeder tube.

[0043] In this embodiment, the third coupling part 235 of the jet nozzle 210 is also connected to the first coupling part 231 .

[0044] 3, the first coupling portion 231 and the second coupling portion 431 are described as being screw-coupled, but the first coupling portion 231 and the second coupling portion 233 may be machined into a through-hole and a cylinder of the same diameter and coupled in a fitted form. It goes without saying that the fitted fuel atomization device can be fixed in position by the jet nozzle. The coupling method of the first and second coupling portions is not limited to screw coupling or fitting coupling.

[0045] In the embodiment of FIG. 4, the fuel atomization device 400 has a fourth through-hole 236 that communicates with the second through-hole 233 in the opposite direction to the first through-hole 232, and the fourth through-hole 236 has a fourth connecting portion 237.

[0046] The embodiment of FIG. 4 differs from the embodiment of FIG. 3 in that the third coupling portion 235 of the jet nozzle 210 is screw-coupled to the fourth coupling portion 237.

[0047] The embodiment of FIG. 5 differs 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 on the carburetor main body 50 rather than to the air bleeder tube.

[0048] The embodiment in FIG. 6 differs from that in FIG. 4 in that the second coupling portion 431 of the fuel atomization device is formed in the fifth through-hole 238 communicating with the first through-hole 232, and is threadedly coupled to the first coupling portion 231 formed on the outside of the air bleeder tube 220.

[0049] In the above embodiment, 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 collides with the mesh 300 disposed in the first through-hole 232 to be further atomized.

[0050] The fuel discharged from the outlet 213 of the jet nozzle 210 is all atomized fuel.

[0051] The wires forming the net 300 preferably have an angle 8 (see FIG. 7) of 60 degrees or less at the cross section facing the fuel inflow side. If the angle 8 is 60 degrees or more, not only will the flow speed of the atomized fuel slow down, but collisions with fuel particles branching off from adjacent wires will cause the fuel particles to become coarse.

[0052] Furthermore, it is preferable that the rear end portion extending from the angled surface is formed along the fuel flow direction just before the net.

[0053] This allows the atomized fuel to collide with the angled surface, break down into fine particles, and then flow downstream after branching, preventing the branched flows from reuniting at the rear end and increasing the rigidity of the wire.

[0054] On the other hand, it is also preferable that the cross-sectional shape of the wire is one of regular polygons up to octagonal, with the corners of each regular polygon being positioned on the fuel inflow side, as shown in Figures 8(a) to 8(e).

[0055] Although not shown, if the cross section of the wire forming the mesh is circular, forming a number of dimples or protrusions on the surface of the wire can prevent the recombination of fuel flowing along the surface of the wire. Such dimples or protrusions can be formed by etching the surface of the wire or by spraying a separate substance onto the surface of the wire.

[0056] The stacking intervals between the meshes are maintained by spacers, and the stacking intervals are preferably 2 to 20 times the mesh spacing.

[0057] If the stacking distance is less than twice 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, the size of the device becomes large.

[0058] A soot test was conducted on an agricultural management machine equipped with a fuel atomization device according to another embodiment of the present invention, which has 3 to 5 meshes in the mesh number range of #50 to #200, and an agricultural management machine without the device, and the results are shown in Table 1.

[0059] The measurement results in Table 1 are the average values ​​(ppm) obtained by measuring three times in one-minute intervals in the exhaust pipe three minutes after starting the engine.

[0060] [Table 1]

[0061] As shown in the results in Table 1, when the fuel atomization device of the present invention is used, HC and CO are reduced by approximately 24 to 54%, and soot is reduced.

[0062] Table 2 shows the fuel economy test results measured while the engine was running at 3450±50 RPM for a certain period of time.

[0063] [Table 2]

[0064] Use of the fuel atomization device of the present invention will improve fuel efficiency by 3.8 to 10.4%. On the other hand, if the surface of the mesh is subjected to oil repellent treatment by etching or coating, it will be more advantageous for the fuel particles to collide with and be atomized, and it will also be possible to prevent the mesh from being clogged with fuel.

[0065] Fuel injected from the nozzle collides with the net and is scattered by impact, which further breaks down the fuel particles. If multiple nets are installed, the impact scattering occurs in multiple stages, further breaking down the fuel particles. Furthermore, if an oil film forms on the net, it reduces the impact and hinders the break down of the fuel particles. To prevent this, it is necessary to space the overlapping nets apart.

[0066] This principle can also be applied to injectors.

[0067] The injector nozzle through which fuel is injected from the injector can be of a type having an injection port 611 at the tip of the injector nozzle 610 that injects fuel in the longitudinal direction of the injector, as shown in Figure 10(a), or a type having multiple injection ports 611 on the inclined side of the tip of the injector nozzle 610, as shown in Figure 11(a).

[0068] In the case of an injector nozzle 610 as shown in FIG. 10(a), a fuel atomization device 400 including a first through-hole 232 with a mesh 300 and a spacer 500 stacked therein and a second coupling part 431 coupled to a first coupling part 231 formed on the injector nozzle can be mounted as shown in FIGS. 10(b) and (c).

[0069] The first through-hole 232 of the fuel atomization device is open to the injector side and communicates with the second through-hole 233 that is open in the direction in which the fuel particles are injected. A mesh 300 and a spacer 500 are stacked on a step 234 formed by the difference in inner diameter between the first and second through-holes 232, 233.

[0070] Fuel particles injected from the injection port 611 of the injector nozzle are atomized while passing through the mesh of the first through-holes 232.

[0071] As shown in FIG. 11(a), when fuel is injected at a certain angle from the tip direction through multiple injection ports 611 machined on the inclined side of the injector nozzle 610, the fuel atomization device will have a shape different from that shown in FIG. 10(a).

[0072] 11(b) and (c), the fuel atomization device 400 includes an upper frame 410 having a second coupling portion 431 coupled to a first coupling portion 231 formed on an injector nozzle 610, and an upper mounting portion 411 on which one ends of the meshes 300-1 and 300-2 and upper spacers 500-1, 500-3, and 500-5 are mounted, a lower frame 420 having a lower mounting portion 421 on which the other ends of the meshes 300-1 and 300-2 and lower spacers 500-2, 500-4, and 500-6 are mounted, a plurality of meshes 300-1 and 300-2 are arranged at intervals spaced apart by upper and lower spacers 500-1 to 6, and the upper and lower spacers 500-1 to 6, and a support base 440 connecting the upper and lower frames.

[0073] As a result, fuel particles injected into the injection port 611 on the inclined side of the injector nozzle pass through the mesh and are further refined.

[0074] The support base 400 prevents the meshes 300-1 and 300-2 from being deformed by the injection pressure of the fuel particles, and when the number of injection ports 611 of the injector nozzle 610 is large, it is preferable to increase the number at equal intervals.

[0075] The angle of inclination of the inclined side surface of the injector nozzle 610 and the angle of inclination of the meshes 300-1 and 300-2 are preferably the same.

[0076] The meshes 300-1 and 300-2 and the upper and lower spacers 500-1 to 500-6 are thin and elastically deformable, and can be inserted into the upper through-holes of the upper frame 410. [Industrial Applicability]

[0077] The present invention relates to a fuel atomization device that is attached to an engine carburetor or injector to improve fuel economy and reduce smoke. [Explanation of symbols]

[0078] 1. Vaporizer 10. Throttle valve 20 Venturi section 30 Needle 40 Float Chamber 50 Vaporizer body 100 Pilot jet part 200 main jet part 210 Jet Nozzle 213 Outflow 220 Air bleeder tube 231 1st joint 232 1st hole 233 2nd hole 234 Step 235 Third joint 236 4th hole 237 4th joint 238 5th hole 300 net 400 Fuel atomization device 410 Upper Frame

Claims

1. a jet nozzle including an inlet portion 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 passes and which has a diameter smaller than that of the inlet portion, and an outlet portion through which the liquid fuel flowing in from the small diameter portion is atomized and which has a diameter larger than that of the small diameter portion; an air bleeder tube connected to the jet nozzle for mixing the fuel atomized through the jet nozzle with external air and supplying the resulting mixture to the venturi section; A fuel atomization device attached to a carburetor including a carburetor body provided with the float chamber, the jet nozzle, and the air bleeder tube, a second through hole formed on the air bleeder tube side, the second through hole having a diameter larger than that of the outlet portion, the second through hole communicating with the first through hole, the second through hole having the same diameter as the outlet portion, and the second through hole communicating with and connected to the outlet portion of a jet nozzle; a step formed by a difference in diameter between the first through hole and the second through hole or by separate processing; a plurality of spacers sequentially stacked on the step, the spacers having a third through hole in the center and having the same diameter as the outlet portion; a plurality of meshes disposed between the spacers; and fixing means for fixing the stacked meshes and the spacers.

2. The fuel atomization device according to claim 1, wherein the jet nozzle includes a third coupling portion that is screw-coupled to the first coupling portion.

3. the fuel atomization device includes a fourth through-hole connected to the second through-hole, and a fourth connecting portion machined in the fourth through-hole, 2. The fuel atomization device according to claim 1, wherein the third coupling portion of the jet nozzle is threadedly coupled to the fourth coupling portion.

4. 2. The fuel atomization device according to claim 1, wherein an angle of an angle from a cross section of the wires forming the net toward a side into which fuel flows is within 60 degrees.

5. 5. The fuel atomization device according to claim 4, wherein a rear end extending from said angled surface comprises a surface parallel to the direction of fuel flow.

6. 2. The fuel atomization device according to claim 1, wherein the cross section of the wires forming the mesh is a regular polygon not exceeding an octagon.

7. 2. The fuel atomization device according to claim 1, wherein when the cross section of the wires forming the mesh is circular, a plurality of dimples or protrusions are formed on the surface thereof.

8. 2. The fuel atomization device according to claim 1, wherein the stacking interval of said mesh is 2 to 20 times the width of the mesh openings.

9. A fuel atomization device attached to an injector having an injection port at the nozzle tip for injecting fuel in the longitudinal direction of the injector, a plurality of stacked nets for atomizing the fuel by impact scattering caused by collision of the fuel injected from the injection port; a plurality of spacers inserted between the stacked nets to space them apart; a first through hole formed by laminating the mesh and the spacer and opening toward the injector; a second coupling portion formed inside the first through-hole to be coupled with a first coupling portion formed outside the injector nozzle; a second through-hole communicating with the first through-hole and opening to the outside; a step for positioning the mesh and the spacer within the first through-hole.

10. A fuel atomization device attached to an injector having a plurality of injection ports on the inclined side of the nozzle tip, a second coupling part coupled to a first coupling part formed on an injector nozzle; an upper frame having an upper mounting part on which one ends of a plurality of meshes and a plurality of upper spacers are mounted; a lower frame having a lower mounting part on which the other ends of the plurality of meshes and a plurality of lower spacers are mounted; a plurality of meshes having an inclined cone shape between the upper mounting part and the lower mounting part, the meshes being spaced apart by the upper and lower spacers; the upper and lower spacers; and a support base connecting the upper frame and the lower frame.

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