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 specifically, to a fuel atomization device mounted on a carburetor or an injector for improving fuel efficiency and reducing soot. Background Art

[0002] A gasoline engine that generates power by combusting a fuel-air mixture supplied into a cylinder uses a carburetor or an injector to generate the fuel-air mixture, while a diesel engine uses an injector.

[0003] In the case of automobile engines, the injector system is mostly adopted, but small engines used in motorcycles, lawn mowers, agricultural management machines and the like still often adopt the carburetor system.

[0004] Compared with the injector system, the carburetor system has the advantages of low price, high output, simple structure and easy maintenance, but it has the disadvantages of poor fuel efficiency and smooth starting in winter.

[0005] In order to solve these problems, when mixing fuel and air in an engine equipped with a carburetor, it is necessary to further refine and homogenize fuel particles in the fuel-air mixture.

[0006] Figure 1 shows a conventional carburetor. When the throttle valve 10 is closed (during idling), the pilot jet section 100 generates a fuel / air mixture. When the throttle valve 10 is open, the main jet section 200 generates the fuel / air mixture together with the pilot jet section 100, or by itself. The generated fuel / air mixture is supplied to the engine's combustion chamber via the venturi section 20. The amount of fuel / air mixture supplied by the main jet section 200 is controlled by the degree to which the throttle valve 10 is opened and the degree to which the needle 30 is inserted.

[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 section is used by combining a separately manufactured jet nozzle and air bleeder tube, while the pilot jet section is often manufactured as a single unit.

[0009] Since the main jet section 200 and the pilot jet section 100 have similar structures and operating relationships, this application will focus on describing the main jet section, and will not distinguish between the main jet section and the pilot jet section in terms of common configurations and terminology.

[0010] While some carburetors, depending on their type, do not atomize the liquid fuel with a jet nozzle but instead emulsify it with air flowing in through an air bleeder tube, forming a fuel / air mixture in which air particles are included in the liquid fuel, this invention relates to a carburetor in which the liquid fuel is atomized by a jet nozzle, forming a fuel / air mixture in which the fuel is distributed in particulate form in the air. Its principle and technical concept differ from carburetors that emulsify the fuel with air.

[0011] The applicant, through Korean Registered Patent Publication No. 10-2013221, disclosed a vaporizer comprising: a float chamber for storing liquid fuel; a jet nozzle comprising: an inlet whose entrance is immersed in the liquid fuel in the float chamber; a small-diameter section through which the liquid fuel flowing in from the inlet passes and which has a smaller diameter than the inlet; and an outlet section through which the liquid fuel flowing in from the small-diameter section is atomized and which has a larger diameter than the small-diameter section; and an air bleeder tube connected to the jet nozzle for supplying the atomized fuel via the jet nozzle to a venturi section after mixing it with external air, characterized in that 2 to 10 first meshes are stacked in the outlet section from the small-diameter section side, and then 1 to 2 second meshes with a larger mesh number than the first meshes are further stacked in the same stacking direction.

[0012] In the applicant's registered patent, a mesh must be stacked in the outlet section of the jet nozzle, but the size of the outlet section is very small, with a diameter of only about 3.5 mm, making it difficult to assemble the mesh so that it is spaced at regular intervals and perpendicular to the flow direction. [Overview of the project] [Problems that the invention aims to solve]

[0013] The present invention aims to provide a fuel atomization device that can be attached to conventional carburetors and injectors to atomize fuel particles, thereby improving fuel efficiency and reducing soot.

[0014] Another objective of the present invention is to provide a fuel atomization device that is easy to assemble and manufacture and can be easily attached to a vaporizer and injector.

[0015] The fuel atomization device of the present invention, devised to achieve the aforementioned objectives, A float chamber in which liquid fuel is stored, A jet nozzle comprising an inlet section whose entrance is immersed in the liquid fuel in the float chamber, a small-diameter section through which the liquid fuel flowing in from the inlet section passes and which has a smaller diameter than the inlet section, and an outlet section through which the liquid fuel flowing in from the small-diameter section is atomized and which has a larger diameter than the small-diameter section, An air bleeder tube connected to the jet nozzle mixes the atomized fuel through the jet nozzle with external air and supplies it to the venturi section, In a fuel atomization device attached to a vaporizer which includes a vaporizer body portion provided with a float chamber, a jet nozzle, and an air bleeder tube, A second coupling portion is coupled to a first coupling portion formed in the air bleeder tube or the carburetor body, Having a diameter larger than the diameter of the outlet, a first through-hole formed on the air bleeder tube side, A second through-hole is connected to the first through-hole, has the same diameter as the outflow section, and is connected to the outflow section of the jet nozzle, The difference in diameter of the first and second through holes, or the step formed by separate processing, Multiple spacers are sequentially stacked on the aforementioned step and each has a third through-hole in the center having the same diameter as the outflow section, A plurality of meshes arranged between the spacers, The invention is characterized by including fixing means for fixing the stacked mesh and spacers.

[0016] The jet nozzle preferably includes a third coupling portion that is screw-connected to the first coupling portion.

[0017] The fuel atomization device comprises a fourth through-hole connected to a second through-hole, and a fourth connecting portion machined into the fourth through-hole. It is also preferable that the third coupling portion of said jet nozzle is screw-coupled to said 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 for injecting fuel in the longitudinal direction of the injector at a nozzle tip, wherein the device comprises a mesh and a spacer stacked, a first through hole opened to the injector side, 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 opened to the outside, a step for positioning said mesh and said 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, wherein the device comprises a second coupling portion coupled to a first coupling portion formed on the injector nozzle, an upper frame provided with an upper mounting portion for mounting one end of a plurality of meshes and a plurality of upper spacers, a lower frame provided with a lower mounting portion for mounting the other end of the plurality of meshes and a plurality of lower spacers, a plurality of meshes arranged in an inclined cone shape between the upper mounting portion and the lower mounting portion, spaced apart by the upper and lower spacers, the upper and lower spacers, and a support base connecting said upper frame and said lower frame.

[0020] It is preferable that an angle of a corner of the cross-section of the wire forming said mesh, the corner facing toward a fuel inflow side, is within 60 degrees.

[0021] It is preferable that a rear end portion extending from a surface forming said corner is formed of a surface parallel to the flow direction of fuel.

[0022] It is preferable that the cross-section of the wire forming said mesh is a regular polygon with no more than 8 sides.

[0023] It is preferable that when the cross-section of the wire forming said mesh is circular, a plurality of dimples or protrusions are formed on the surface of the wire.

[0024] It is preferable that the lamination interval between the meshes is 2 to 20 times the space opening of the meshes.

[0025] In a fuel atomization device attached to an injector that is provided with an injection port injecting fuel in the longitudinal direction of the injector at a nozzle tip, a plurality of meshes stacked for atomizing fuel by impact scattering generated when the fuel injected from the injection port collides, a plurality of spacers inserted between the meshes to space the stacked meshes apart, a first through-hole that is open toward the injector side and has the meshes and the spacers stacked therein, a second coupling part formed inside the first through-hole to be coupled with a first coupling part formed on an outer side of the injector nozzle, a second through-hole that communicates with the first through-hole and is open to the outside, and a stepped portion for positioning the meshes and the spacers in the first through-hole.

[0026] In a fuel atomization device attached to an injector provided with a plurality of injection ports on an inclined side surface of a nozzle tip, the fuel atomization device comprises: a second coupling part coupled to a first coupling part formed on an injector nozzle; an upper frame provided with an upper mounting part for mounting one end of a plurality of meshes and a plurality of upper spacers; a lower frame provided with a lower mounting part for mounting the other end of the plurality of meshes and a plurality of lower spacers; the plurality of meshes arranged in an inclined cone shape between the upper mounting part and the lower mounting part, 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. [Advantageous Effects of Invention]

[0027] According to the present invention having the above-described configuration, it is possible to micronize and homogenize fuel particles, improve fuel efficiency and reduce soot, and the present invention is easy to assemble and manufacture, and has the effect of being easily mountable to a carburetor and an injector. [Brief Description of Drawings]

[0028] [Figure 1] This diagram shows the configuration of a conventional vaporizer. [Figure 2] This is a diagram showing the applicant's conventional vaporizer structure. [Figure 3] This figure shows an embodiment of the present invention. [Figure 4] This figure shows an embodiment of the present invention. [Figure 5] This figure shows an embodiment of the present invention. [Figure 6] This figure shows an embodiment of the present invention. [Figure 7] This figure shows various embodiments of the cross-sectional shape of the mesh according to the present invention. [Figure 8] This figure shows various embodiments of the cross-sectional shape of the mesh according to the present invention. [Figure 9] This is a plan view showing the shape of the spacer of the present invention. [Figure 10] This figure shows another embodiment of the present invention. [Figure 11] This figure shows yet another embodiment of the present invention. [Modes for carrying out the invention]

[0029] The present invention will be described in more detail below with reference to the drawings illustrating its embodiments.

[0030] Figures 3 to 6 illustrate fuel atomization devices according to various embodiments of the present invention.

[0031] The jet section, which draws in and atomizes fuel to produce a fuel / air mixture supplied to the venturi section 20 of the vaporizer 1, includes a jet nozzle 210 and an air bleeder tube 220, and the fuel atomizer 400 is positioned between the jet nozzle 210 and the air bleeder tube 220.

[0032] This explanation uses the main jet section 200 as an example, but it goes without saying that the same principles apply to the pilot jet section.

[0033] The fuel atomizer 400 shown in Figures 3 to 6 has an inner diameter larger than the inner diameter of the outlet section 213 and includes a first through hole 232 formed on the air bleeder tube side, and a second through hole 233 formed on the jet nozzle side that communicates with the first through hole 232 and has the same inner diameter as the outlet section 213, with one end of the second through hole 233 connected to one end of the outlet section 213 of the jet nozzle 210.

[0034] Since the first through hole 232 is arranged to communicate with the second through hole 233, 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.

[0035] The step can be formed within the first through-hole by another process.

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

[0037] The mesh 300 and spacer 500 are alternately stacked on top of the spacer 500 supported by the step 234.

[0038] During assembly, the stacked spacers 500 and mesh 300 can be fixed in place by the inner surface of the air bleeder tube 220 acting as a fixing means, as shown in Figure 3. Alternatively, the uppermost spacer or mesh can be fixed by welding or adhesive to the first through-hole.

[0039] Alternatively, a fixing method can be employed in which the size of the spacer or mesh is made slightly larger than the first through-hole, and the spacer or mesh is forcibly inserted and fixed into the first through-hole.

[0040] Instead of the uppermost spacer, a fixing means may be provided by connecting a screw with a through hole in the center to the first through hole 232.

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

[0042] Such a fuel atomizer 400 is attached to the air bleeder tube 220, and includes a second coupling portion 431 that is screw-connected to a first coupling portion 231 formed inside the air bleeder tube 220.

[0043] In this embodiment, the jet nozzle 210 also has a third coupling portion 235 connected to the first coupling portion 231.

[0044] In the embodiment shown in Figure 3, the first joint 231 and the second joint 431 are described as being screw-connected, but the first joint 231 and the second joint 233 can be joined in a fitted configuration by machining through holes of the same diameter into a cylinder. Needless to say, the position of the fitted fuel atomizer can be fixed by the jet nozzle. The method of joining the first and second joints is not limited to screw connection or fitted connection.

[0045] In the embodiment shown in Figure 4, the fuel atomizer 400 is provided with 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 is provided with a fourth coupling portion 237.

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

[0047] The embodiment shown in Figure 5 differs from the embodiment in Figure 4 in that the second coupling portion 431 of the fuel atomizer is coupled to the first coupling portion 231 formed on the vaporizer body portion 50, rather than to the air bleeder tube.

[0048] In the embodiment shown in Figure 6, the second coupling portion 431 of the fuel atomizer is formed in a fifth through-hole 238 that communicates with the first through-hole 232, and is screw-connected to the first coupling portion 231 formed on the outside of the air bleeder tube 220, which is different from Figure 4.

[0049] In the above embodiment, the outlet portion 213 of the jet nozzle 210 is connected to the second through-hole 233, and the fuel that passes through the second through-hole 233 collides with the mesh 300 located in the first through-hole 232 and is further atomized.

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

[0051] Preferably, the wires forming the mesh 300 have an angle 8 (see Figure 7) of the corner facing the fuel inflow side in the cross-section of the wires that is 60 degrees or less. If the angle 8 is 60 degrees or more, not only will the flow velocity of the atomized fuel decrease, but a problem will occur in which fuel particles collide with fuel particles flowing branched off from adjacent wires, causing the fuel particles to become coarser.

[0052] Furthermore, it is preferable that the rear end portion extending from the aforementioned angled surface is formed in line with the fuel flow direction immediately before the mesh.

[0053] This allows the atomized fuel to strike the corner surfaces, be atomized further, branch off, and flow downstream. The trailing end prevents the branched flows from rejoining, and also increases the rigidity of the wire.

[0054] On the other hand, the cross-sectional shape of the wire may also preferably consist of one of eight or fewer regular polygons. As shown in Figures 8(a) to (e), the corners of each regular polygon are positioned on the side into which the fuel flows.

[0055] Although not shown in the diagram, if the cross-section of the wire forming the network is circular, forming numerous dimples or protrusions on its surface can prevent the recombination of fuel flowing along the wire surface. Such dimples or protrusions can be formed by methods such as corrosion of the wire surface or by spraying another substance onto it.

[0056] Each mesh will maintain its stacking interval with spacers, and it is preferable that this stacking interval is 2 to 20 times the mesh size.

[0057] If the stacking interval is less than twice the mesh size, it is difficult to prevent the formation of a liquid film between the meshes, and if it is more than 20 times the mesh size, there is a problem in that the size of the device becomes large.

[0058] Soot tests were conducted on agricultural cultivators equipped with a fuel atomization device according to another embodiment of the present invention, which has 3 to 5 mesh screens in the range of mesh numbers #50 to #200, and on agricultural cultivators without the device, and the results shown in Table 1 were obtained.

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

[0060] [Table 1]

[0061] As shown in Table 1, using the fuel atomizer of the present invention reduces HC and CO to approximately 24-54%, and reduces soot emissions.

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

[0063] [Table 2]

[0064] Using the fuel atomization device of the present invention will improve fuel efficiency by 3.8 to 10.4%. Furthermore, treating the surface of the mesh with an oil-repellent treatment by etching or coating is even more advantageous for the fuel particles to collide and be atomized, and it also prevents the mesh from becoming clogged with fuel.

[0065] Fuel injected from the nozzle collides with the mesh, causing impact scattering, which further refines the fuel particles. When multiple meshes are installed, the impact scattering becomes multi-stage, further refining the fuel particles. Furthermore, if an oil film forms on the mesh, the impact is mitigated, hindering the refinement of fuel particles. To prevent this, it is necessary to space out the overlapping meshes.

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

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

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

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

[0070] Fuel particles injected from the injector nozzle's nozzle opening 611 are atomized as they pass through the mesh of the first through-hole 232.

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

[0072] As shown in Figures 11(b) and (c), the fuel atomizer 400 includes an upper frame 410 having an upper mounting section 411 that mounts one end of mesh 300-1 and 300-2 and upper spacers 500-1, 500-3, and 500-5, a lower frame 420 having a lower mounting section 421 that mounts the other end of mesh 300-1 and 300-2 and lower spacers 500-2, 500-4, and 500-6, mesh 300-1 and 300-2 arranged in an inclined cone shape between the upper mounting section 411 and the lower mounting section 421 at a distance separated by upper and lower spacers 500-1 to 6, 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 inlet 611 on the slanted side of the injector nozzle are further refined as they pass through the mesh.

[0074] The support base 400 prevents the mesh 300-1 and 300-2 from deforming due to the injection pressure of fuel particles, and it is preferable to increase the number of injection ports 611 of the injector nozzle 610 at equal intervals when there are many of them.

[0075] It is preferable that the inclination angle of the inclined side of the injector nozzle 610 and the inclination angle formed by the mesh 300-1 and 300-2 are the same.

[0076] The mesh 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] This invention relates to a fuel atomization device that is attached to the carburetor or injector of an engine to improve fuel efficiency and reduce soot emissions. [Explanation of Symbols]

[0078] 1. Vaporizer 10 Throttle valve 20 Venturi section 30 needles 40 Float Chamber 50 Vaporizer main unit 100 Pilot Jet Section 200 Main Jet Section 210 Jet Nozzle 213 Outlet 220 Air Bleeder Tube 231 1st joint 232 1st hole 233 2nd hole 234 steps 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 comprising an inlet section whose entrance is immersed in the liquid fuel inside the float chamber, a small-diameter section through which the liquid fuel flowing in from the inlet section passes and which has a smaller diameter than the inlet section, and an outlet section through which the liquid fuel flowing in from the small-diameter section is atomized and which has a larger diameter than the small-diameter section, An air bleeder tube connected to the jet nozzle mixes the atomized fuel through the jet nozzle with external air and supplies it to the venturi section, In a fuel atomization device attached to a vaporizer which includes a vaporizer body portion provided with a float chamber, a jet nozzle, and an air bleeder tube, A fuel atomization device comprising: a second coupling portion coupled to a first coupling portion formed in an air bleeder tube or the carburetor body; a first through hole formed on the air bleeder tube side having a diameter larger than the diameter of the outlet portion; a second through hole communicating with the first through hole, having the same diameter as the outlet portion, and connected in communication with the outlet portion of the jet nozzle; a step formed by the difference in diameter between the first and second through holes, or by separate processing; a plurality of spacers sequentially stacked on the step, each having a third through hole in the center having the same diameter as the outlet portion; a plurality of meshes arranged between the spacers; and fixing means for fixing the stacked meshes and spacers.

2. The fuel atomizing device according to claim 1, characterized in that the jet nozzle comprises a third coupling portion screw-connected to the first coupling portion.

3. The fuel atomization device comprises a fourth through-hole connected to a second through-hole, and a fourth connecting portion machined into the fourth through-hole. The fuel atomization device according to claim 1, characterized in that the third coupling portion of the jet nozzle is screw-coupled to the fourth coupling portion.

4. The fuel atomization device according to claim 1, characterized in that the angle of the corner from the cross-section of the wire forming the mesh toward the side into which the fuel flows is within 60 degrees.

5. The fuel atomization device according to claim 4, characterized in that the rear end portion extending from the aforementioned angled surface is a surface parallel to the fuel flow direction.

6. The fuel atomization device according to claim 1, characterized in that the cross-section of the wires forming the mesh is a regular polygon with no more than 8 sides.

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

8. The fuel atomization apparatus according to claim 1, characterized in that the stacking interval of the mesh is 2 to 20 times the mesh size.

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