Fuel droplet miniaturization device

Abstract

A fuel droplet miniaturization device is provided, which suppresses the influence of flow electrification and efficiently converts fuel liquid into tiny droplets, thereby achieving an increase and stabilization of engine output. The fuel droplet miniaturization device is composed of a fragmentation promotion component (30), and the fragmentation promotion component (30) is composed of wires, mesh sheets, belts, etc. formed of metal, semiconductor, polymer, ceramic, glass, etc. The fragmentation promotion component (30) is arranged between the ejection port (20) of a vaporizer or a fuel injection device and the intake valve (41) of the engine, so that the fuel liquid ejected from the ejection port (20) of the vaporizer or the fuel injection device collides with the fragmentation promotion component (30), and the fuel liquid is crushed / scattered by the impact to promote the formation of tiny droplets.

Description

Technical Field

[0001] The present invention relates to a device for miniaturizing fuel droplets injected from a carburetor or a fuel injection device used in an internal combustion engine or the like. Background Art

[0002] In order to improve the thermal efficiency of the internal combustion engine, it is necessary to deliver as much air as possible to the combustion chamber. Therefore, the fuel is delivered to the combustion chamber in the form of droplets to reduce the volume ratio occupied by the fuel. In an internal combustion engine (engine) using an existing carburetor (carburettor) or an indirect injection injector (injector), the sprayed fuel is designed to collide with gas molecules in the intake pipe or the combustion chamber and be crushed into tiny droplets, which are evenly dispersed in the combustion chamber. The vaporized fuel and fuel droplets contained in the mixed gas in the combustion chamber will burn once the temperature reaches the ignition point due to the propagation of the combustion wave generated by ignition (Non-Patent Literature 1).

[0003] It is believed that in droplets with small diameters, due to the large surface area per unit volume (specific surface area), heat can be efficiently absorbed from the outside. Since the contact area with oxygen molecules is large, chemical reactions are easy to occur, so the combustion wave progresses faster and the combustion efficiency in the combustion chamber increases.

[0004] However, if the engine speed increases, the time for the fuel to be finely dropletized and vaporized becomes shorter, and the amount of unburned and discharged fuel increases, and the expected power and torque cannot be obtained. Furthermore, the distribution of the size of the fuel droplets injected from the carburetor or the indirect fuel injection device has a certain range, and there is a fluctuation in the size (diameter) of the droplets each time the injection is injected, thereby causing fluctuations in the output and rotation of the engine. It is thought that there is still room for research / improvement on the size of the fuel droplets.

[0005] The inventors have found that the fuel droplets are charged (flow charging) before being transported to the combustion chamber due to friction with the liquid delivery pipe or the injection pipe when being injected from the injection device (Patent Document 1). In the charged fuel droplets, the cohesive force becomes larger than that in the uncharged state due to the Coulomb attraction between the molecules of the charge and the dielectric polarization (Non-Patent Document 2). Therefore, it is believed that the charged fuel is difficult to be crushed by collision, and it is difficult to vaporize even in the cylinder.

[0006] Prior Art Literature

[0007] Patent Literature

[0008] Patent document 1: WO2020 / 145184.

[0009] Non-patent literature

[0010] Non-patent document 1: Advanced engine technology, HeintzHeisler, 2009, Butterworth-Heinemann;

[0011] Non-patent document 2: JN Esler Archievich, Intermolecular Forces and Surface Forces, 2nd edition, Asakura Shoten, 1996. Summary of the invention

[0012] Problems to be solved by the invention

[0013] In order to achieve high thermal efficiency and high power / torque of an internal combustion engine, it is necessary to improve combustion efficiency so that fuel droplets injected from a fuel injection device can be quickly micronized and easily vaporized in a cylinder.

[0014] An object of the present invention is to provide a fuel droplet miniaturization device that can suppress the influence of flow electrification and efficiently miniaturize fuel droplets, thereby contributing to increasing and stabilizing the output of an internal combustion engine.

[0015] Solutions to Solve Problems

[0016] One form of the present invention is a fuel droplet miniaturization device for fragmenting fuel droplets supplied to an internal combustion engine, comprising one or more linear or mesh-like fragmentation promoting components, wherein the fuel droplets collide with the fragmentation promoting components, are fragmented and supplied to the internal combustion engine.

[0017] The crushing promotion component is composed of a wire, a mesh sheet, a belt, etc. formed of metal, semiconductor, polymer, ceramic, glass, etc. The crushing promotion component collides with the fuel droplets supplied to the engine. The fuel droplets are crushed by the impact and become fine droplets that fly into the combustion chamber of the engine.

[0018] As the droplets become smaller, the amplitude of fluctuation in the diameter of the droplets (the amplitude of the diameter distribution) becomes smaller, so that the combustion speed of the internal combustion engine becomes constant and a stable output can be obtained.

[0019] In one embodiment of the fuel droplet miniaturization device of the present invention, the fragmentation promoting member is composed of a conductor or a semiconductor.

[0020] When the fragmentation promoting member is a conductor or a semiconductor, the charge generated in the fuel droplets due to flow electrification caused by injection leaks from the fuel droplets to the fragmentation promoting member when the fuel droplets collide with the fragmentation promoting member and is lost from the fuel droplets.

[0021] Therefore, the cohesive force of the broken fuel droplets becomes smaller, and the combustion efficiency in the combustion chamber is improved.

[0022] In addition, in one form of the fuel droplet miniaturization device of the present invention, the aforementioned fragmentation promoting component is arranged at a position between the nozzle where the mixed gas of the aforementioned fuel droplets and air sprayed from the fuel injection device is supplied into the intake pipe of the aforementioned internal combustion engine, and between the nozzle where the aforementioned fuel injection device sprays the aforementioned fuel droplets into the aforementioned intake pipe and the end of the aforementioned intake pipe where the aforementioned mixed gas is delivered to the aforementioned internal combustion engine, and the aforementioned fragmentation promoting component is connected to the aforementioned internal combustion engine, carburetor or fuel injection device.

[0023] In the case where the aforementioned crushing promoting component is a conductor or a semiconductor, by connecting the crushing promoting component to an internal combustion engine, a vaporizer, a fuel injection device, etc., the capacitance of the crushing promoting component becomes larger, and even when the charge moves from the fuel droplets, the potential of the crushing promoting component does not drop.

[0024] In addition, in one form of the fuel droplet miniaturization device of the present invention, the aforementioned fragmentation promoting component is arranged at a position between a nozzle where a mixed gas of the aforementioned fuel droplets and air sprayed from a fuel injection device is supplied into an intake pipe of the aforementioned internal combustion engine, and between a nozzle where the aforementioned fuel injection device sprays the aforementioned fuel droplets into the aforementioned intake pipe and an end portion of the aforementioned intake pipe where the aforementioned mixed gas is delivered to the aforementioned internal combustion engine, and a potential of the aforementioned fragmentation promoting component is set higher than a potential of the aforementioned intake pipe.

[0025] In the case where the aforementioned fragmentation promoting component is a conductor or a semiconductor, by increasing the potential of the aforementioned fragmentation promoting component, the probability of flowing charged fuel droplets colliding with the fragmentation promoting component becomes higher, and the fuel droplets are accelerated and collide with the fragmentation promoting component at a rapid speed, thereby promoting the formation of tiny droplets.

[0026] Effects of the Invention

[0027] According to the present invention, liquid fuel can be efficiently converted into fine droplets, and the output of the internal combustion engine can be increased and stabilized. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is a characteristic diagram showing changes in the distribution of droplet diameters according to the present invention.

[0029] Figure 2A It is a cross-sectional view of the fuel droplet miniaturization device according to the embodiment (first example).

[0030] Figure 2B It is a top view of the fuel droplet miniaturization device according to the embodiment.

[0031] Figure 3 It is a cross-sectional view of the fuel droplet miniaturization device according to the embodiment (second example).

[0032] Figure 4 This is a characteristic diagram showing the potential change of the fuel droplet miniaturization device.

[0033] Figure 5 This is a characteristic diagram for determining the period of engine sound.

[0034] Figure 6 It is a characteristic diagram showing the waveform of the engine sound (medium speed rotation range).

[0035] Figure 7 It is a characteristic diagram showing the waveform of the engine sound (high speed rotation range).

[0036] Figure 8 It is a characteristic diagram showing the power spectrum (medium speed rotation range) of the combustion stroke.

[0037] Fig. 9 It is a characteristic diagram showing the power spectrum (high speed rotation range) of the combustion stroke. DETAILED DESCRIPTION

[0038] In an internal combustion engine, in order to improve the combustion efficiency of fuel and increase the combustion ratio, it is necessary to feed sufficient oxygen and fuel into a combustion chamber in a short period of time.

[0039] When a component (fragmentation promoting component) that collides with fuel droplets ejected from a carburetor or a fuel injection device is provided in an intake pipe that delivers fuel and air to a combustion chamber to achieve miniaturization of fuel droplets, the conductivity that indicates the ease of flow in the intake pipe is reduced. There is a trade-off between "realizing a high probability of collision between fuel droplets and the fragmentation promoting component" and "realizing a high conductivity of the intake pipe."

[0040] In the fuel droplet miniaturization device of the present invention, this problem is solved by devising the shape of the fragmentation promoting member provided in the intake pipe.

[0041] The crushing promoting member may be made of metal, semiconductor, polymer, ceramic, glass, etc. and formed into a wire, mesh sheet, belt, etc. The above-mentioned shapes may be formed from a material in which the surface of a polymer is coated with metal.

[0042] The reduction in the conductance of the intake duct can be reduced by using a linear body, a belt-shaped body, or a mesh sheet as the crushing promotion member.

[0043] The mesh sheet can be formed by die cutting, laser processing or the like.

[0044] The stability of the output of an internal combustion engine is an important factor in its performance, and particularly determines the driving stability and comfort when the load applied to the internal combustion engine varies, such as in an automobile.

[0045] The diameters of individual droplets injected from the fuel injection device are distributed in a certain range, and the distribution of the diameters of the droplets injected each time is considered to fluctuate within this range.

[0046] When the fuel droplets are crushed by the fuel droplet miniaturization device of the present invention, the number of droplets increases and the diameter of each droplet decreases, so the amplitude of fluctuation in the diameter of the fuel droplets (the amplitude of the diameter distribution) becomes smaller.

[0047] Figure 1 The relationship between the droplet diameter and the distribution of the droplet diameter is shown. The dotted line shows the distribution of the diameter of the sprayed droplets, and the solid line shows the distribution of the diameter of the micronized droplets after the droplets are crushed. In this way, by crushing the droplets and reducing their diameters, the amplitude of the fluctuation of the diameter becomes smaller.

[0048] The amplitude of the fluctuation of the diameter of each droplet ejected at each time can be considered to be contained in the full width at half maximum (FWHM) of the distribution. Therefore, the more the droplets are miniaturized, the smaller the amplitude of the fluctuation of the droplet diameter.

[0049] The progress of the combustion wave depends on the distribution of the sizes (diameters) of the individual droplets, and it is therefore believed that the smaller the fluctuation in the distribution, the more constant the combustion speed becomes, and the more stable output with less fluctuation can be obtained.

[0050] In addition, if the fuel liquid is made into tiny droplets, the area per unit volume or unit mass (specific surface area) becomes larger, so the combustion efficiency becomes higher. It is well known that the miniaturized liquid fuel burns explosively. The following situation is known as a dust explosion in a coal mine or a grain mill: even in the case of a solid, once the crushed particles are ignited in a state of diffusion in the air, an explosion occurs.

[0051] It is desirable that a material having high electrical conductivity or thermal conductivity be used as the material of the crushing promoting member.

[0052] When the fragmentation promoting member is formed of a material with high conductivity, the fuel droplets colliding with the fragmentation promoting member can be charged due to flow charging before the collision and then leak out through the fragmentation promoting member at the time of collision.

[0053] Therefore, the Coulomb attraction between the electrons held by the fuel droplets and the dielectrically polarized molecules becomes smaller, the cohesive force of the fuel droplets decreases, and the fuel droplets become more likely to be split due to collision with nitrogen molecules or oxygen molecules, thereby improving the combustion efficiency in the combustion chamber.

[0054] In this case, it is desirable to connect the crushing promotion component to an external conductor, such as an internal combustion engine, a carburetor, a fuel injection device, etc., to increase the capacitance of the crushing promotion component.

[0055] If the fragmentation promoting member is insulated from other conductors, the charge acquired from the colliding fuel droplets is accumulated, and the fragmentation promoting member is negatively charged. In this case, Coulomb repulsion acts between the fragmentation promoting member and the flowing charged fuel droplets, and the probability of collision between the two is reduced.

[0056] If the crushing promoting member is connected to an external conductor to increase the capacitance, the generation of the Coulomb repulsion can be suppressed.

[0057] Furthermore, when the fragmentation promoting member is formed of a material with high conductivity, the fragmentation promoting member is connected to a power source and maintained at a positive potential, thereby further promoting the fragmentation of the flowing charged fuel droplets.

[0058] When the crushing promotion member is maintained at a positive potential, the fuel droplets negatively charged due to the flow charge are attracted to the crushing promotion member by Coulomb attraction, and the probability of collision with the crushing promotion member becomes high. In addition, the fuel droplets attracted by Coulomb attraction are accelerated and collide with the crushing promotion member at a high speed, thereby promoting the crushing and scattering of the fuel droplets.

[0059] In addition, even when the crushing promoting component is formed from a material with high thermal conductivity, it is ideal to connect the crushing promoting component to an external internal combustion engine, vaporizer, fuel injection device, etc., so that it is less susceptible to the latent heat of vaporization of fuel droplets colliding with the crushing promoting component.

[0060] If part of the fuel droplets that collide with the fragmentation promotion member vaporizes, they absorb latent heat from the fragmentation promotion member. Therefore, if the temperature of the fragmentation promotion member decreases, there is a possibility that the separation of the fuel droplets adsorbed on the fragmentation promotion member will be delayed, which may reduce the combustion efficiency.

[0061] However, if the crushing promotion component is formed of a material with high thermal conductivity and connected to an external excellent conductor with large heat capacity, the temperature drop of the crushing promotion component can be avoided.

[0062] In the previously described patent application of the present inventors and others (Patent Document 1), a micro-droplet injection device characterized by increasing the electrostatic capacitance of the injection port and reducing the potential rise caused by flow charging was disclosed, but the fragmentation promoting component used in the present invention was not used in this injection device.

[0063] In the embodiment of the application (Patent Document 1), during one suction stroke, 3.5 mm 3 -6.9 mm 3 The fuel is split into an average of 16 droplets and released. If the droplets are spherical, the diameter becomes 1.8 mm to 2.4 mm.

[0064] Therefore, the droplets can be broken up by using a fragmentation promoting member in which a plurality of metal wires are arranged in parallel at intervals of about 2 mm or a mesh having a mesh size of about 13 meshes / inch.

[0065] In order to reduce the reduction in the conductivity of the intake pipe, the crushing promoting member may not cover the entire cross section of the intake pipe, but may cover only a part of the cross section of the intake pipe.

[0066] Furthermore, when a decrease in the conductance of the intake pipe becomes a problem, a sufficient amount of air can be supplied to the combustion chamber in a short time by increasing the diameter of the intake pipe where the crushing promoting member is arranged.

[0067] Hereinafter, embodiments of the present invention will be described with reference to examples.

[0068] [Example]

[0069] Figure 2A A first example of a fuel droplet miniaturization device 30 disposed in the middle of an intake pipe 10 for delivering a mixed gas of air and fuel droplets to a combustion chamber of an engine is shown.

[0070] The jet port 20 of the fuel jetting device opens to the intake pipe 10 , and a mixed gas of air flowing in from the intake port 11 of the intake pipe 10 and fuel droplets jetted from the jet port 20 is guided by the intake pipe 10 and sent to the combustion chamber.

[0071] The fuel droplet miniaturization device 30 is arranged at a position of the intake pipe 10 on the downstream side of the injection port 20, such as Figure 2B As shown in the cross-sectional view, it comprises: a crushing promotion component 32, which is composed of a plurality of tungsten wires extending in a direction intersecting the inflow direction of the mixed gas; a circular copper fixing frame 33, in which the two ends of each tungsten wire are fixed in parallel with the plurality of tungsten wires at equal intervals; and a wire 34, which connects the copper fixing frame 33 to an external conductor.

[0072] In addition, as a component for maintaining the fuel droplet miniaturization device 30 in the middle position of the intake pipe 10, it has: an insulating ring 13, which insulates the copper fixing frame 33 from the intake pipe 10; and an insulating tube 12, which is combined with the intake pipe 10 in a state where the fuel droplet miniaturization device 30 is clamped between the insulating ring 13.

[0073] In addition, reference numeral 41 denotes an intake valve of the combustion chamber, and reference numeral 42 denotes an exhaust valve of the combustion chamber. When the combustion chamber is in a sealed state, the end of the intake pipe 10 on the combustion chamber side is closed by the intake valve 41.

[0074] Figure 3A second example of the fuel droplet miniaturization device 30 is shown.

[0075] In the fuel droplet miniaturization device 30, a dry cell 35 is connected to a copper fixing frame 33 that fixes a plurality of tungsten wires of a fragmentation promoting member 32, and the copper fixing frame 33 and the fragmentation promoting member 32 are maintained at a positive potential. Figure 2A and Figure 2B No difference.

[0076] Next, a description will be given of measurements conducted to verify the effects of the fuel droplet miniaturization device of the present invention.

[0077] This assay uses Figure 2A , Figure 2B and Figure 3 In these devices, five tungsten wires 32 with a diameter of 0.4 mm were fixed to a copper fixing frame 33 in a curtain-like manner at intervals of 2.4 mm, and the copper fixing frame 33 was set 4 cm downstream from the injection port 20 of the air intake pipe 10. The diameter of the copper fixing frame 33 was 33 mm, which was equal to the air intake pipe 10, and the width was 2 mm.

[0078] Furthermore, if the tungsten wire 32 is compared with a SUS16 wire of the same diameter, the tensile strength is 700 N / mm 2 , which is 6 times more, the resistance is 4.9×10 -8 Ωm, which is less than 1 / 4, and the thermal conductivity is 177 / W / mT, which is more than 10 times.

[0079] In addition, the engine sound was measured in the following four conditions:

[0080] (1) There is no fuel droplet miniaturization device and the carburetor and the engine are insulated;

[0081] (2) There is no fuel droplet miniaturization device and the carburetor and engine are grounded;

[0082] (3) A fuel droplet miniaturization device is provided and the fuel droplet miniaturization device, the carburetor and the engine are grounded;

[0083] (4) A fuel droplet miniaturization device is provided and the fuel droplet miniaturization device is set to 9 V and the carburetor and the engine are grounded.

[0084] Furthermore, the engine can be considered as a device that converts a part of the energy generated by the combustion of fuel into sound energy, and the states of the air supply, combustion, and exhaust of the engine can be evaluated by measuring the engine sound.

[0085] In addition, the potential of the fuel droplet miniaturization device in a state of being insulated from the carburetor and the engine is measured simultaneously with the measurement of the engine sound. In the case of simultaneous measurement, the sampling rate must be reduced due to the limitation of the storage capacity of the oscilloscope, so the frequency resolution becomes low. The data measured simultaneously are used to confirm the consistency between the cycle of the potential change and the cycle of the engine sound, and to estimate the time when the intake stroke starts from the potential change and to estimate the approximate start time of the intake stroke from the waveform at this time.

[0086] Furthermore, in order to clarify that the increase in acoustic energy is due to the increase in energy generated in the combustion stroke, the power spectrum of the combustion stroke was measured.

[0087] These measurements were performed using the following equipment.

[0088] For the measurement of the engine sound, a condenser microphone (EMM-6, manufactured by Dayton Audio) was used.

[0089] The potential measurement was performed by connecting a passive probe (TA045, manufactured by Pico Technology) to a fuel droplet miniaturization device.

[0090] An oscilloscope (PicoScope 6 5444B, manufactured by Pico Technology) was used for the measurement of the power spectrum.

[0091] Figure 4 The results of measuring the potential of a fuel droplet miniaturization device insulated from the carburetor and the engine are shown. Figure 4 In the figure, the vertical axis is voltage (Voltage(V)) and the horizontal axis is elapsed time (Time(ms)).

[0092] The periodic decrease in potential is obvious. The period of the potential decrease is equal to the period of the engine sound measured at the same time, 19.98 ms. The engine speed obtained from this period is 6000 rpm.

[0093] The potential drop is considered to be caused by the collision of negatively charged fuel droplets with the fragmentation promoting member, and the electrons move to the tungsten wire. The time width of the potential drop is approximately the time width of the intake stroke.

[0094] Figure 5 The waveform of the sound pressure (converted into voltage by a microphone) of the engine sound measured in the state (3) above (a state where the fuel droplet miniaturization device is mounted and the fuel droplet miniaturization device, the carburetor and the engine are grounded) is shown. Figure 5 In the figure, the vertical axis is voltage (Voltage (mV)) and the horizontal axis is elapsed time (Time (ms)).

[0095] In the analysis of engine sound, the period is first determined from the time of the five characteristic peaks of the sound pressure waveform as a function of time. Figure 5 In FIG. 1 , a small interval fitted by assuming the start time and period of the intake stroke is also shown. Figure 5 The cycle time is 8.19 ms (14700 rpm).

[0096] In the analysis of the power spectrum of the combustion stroke, the waveform spectrum as a function of time is Fourier transformed to obtain the power spectrum as a function of frequency and compare and study it. In addition, the power spectrum analysis is performed on data measured individually for the engine sound.

[0097] The source of the power of the engine sound is the power released by the combustion of the fuel, so there is a positive correlation between the power of the engine sound and the combustion energy. Therefore, when the power of the engine sound is large, it can be considered that the combustion amount is large and the combustion power is large.

[0098] In order to analyze the engine sound in the combustion stroke, the power spectrum of each stroke of intake / compression / combustion / exhaust is obtained as follows.

[0099] First, for the four cycles of the four strokes (cycles), the time width of each stroke is used as an equal time width to divide the amount of each cycle into four parts to form sixteen small intervals. If the subscript numbers 1-4 are assigned as a, b, c, d in the order of the four parts until four cycles, the intake stroke is designated as the four small intervals a1, a2, a3, a4, and the compression stroke is designated as the four small intervals b1, b2, b3, b4. The combustion stroke and exhaust stroke are designated in the same way. Figure 5 In the figure, the small intervals of the quantities of the four cycles are shown by the horizontal bars arranged side by side in a stepped manner above the waveform.

[0100] The power spectrum takes the four small intervals of each stroke (a1, a2, a3, a4 in the intake stroke) as continuous intervals and fits the intake stroke, compression stroke, combustion stroke and exhaust stroke simultaneously.

[0101] The purpose of continuously fitting four small intervals of the quantity of four cycles is to extend the length of the analysis interval and improve the frequency resolution.

[0102] The period is obtained from the interval of the characteristic waveform peaks, but the start time of the intake stroke is unknown. Therefore, a fitting is performed with the time staggered in sequence to simultaneously calculate the power spectra of the intake stroke, compression stroke, combustion stroke, and exhaust stroke, and the power spectrum is obtained when the following two conditions are met, and the power spectrum of the intake stroke is adopted.

[0103] (1) The power of the compression stroke is the smallest. (During the compression stroke, the intake and exhaust valves are closed, and no new energy is generated, so the power becomes the smallest.)

[0104] (2) There is a change in component frequency during the transition period of each stroke. (If there is a change in component frequency, the change in component frequency occurs during the transition period of each stroke.)

[0105] First, the analysis results of the engine sound will be described.

[0106] Figure 6 The waveform spectrum measured at a rotation speed of 6000 rpm-9000 rpm (medium speed rotation range) is shown. Figure 7 The waveform spectrum measured at a rotation speed of approximately 14,000 rpm (high-speed rotation range) is shown. The vertical axis is voltage (Voltage (mV)) and the horizontal axis is elapsed time (Time (ms)). In these figures, small intervals fitted using the determined start time and cycle of the intake stroke are also shown.

[0107] exist Figure 6 and Figure 7 Among them, (a) is the measurement result under the state of the aforementioned (1) (a state in which the fuel droplet miniaturization device does not exist and the vaporizer and the engine are insulated), and correspondingly, (b) is the measurement result of the state of the aforementioned (2) (a state in which the fuel droplet miniaturization device does not exist and the vaporizer and the engine are grounded), (c) is the measurement result of the state of the aforementioned (3) (a state in which the fuel droplet miniaturization device is provided and the fuel droplet miniaturization device, the vaporizer and the engine are grounded), and (d) is the measurement result of the state of the aforementioned (4) (a state in which the fuel droplet miniaturization device is provided and the fuel droplet miniaturization device is set to 9 V and the vaporizer and the engine are grounded).

[0108] Figure 6 The period of (a) is 18.9 ms (6300 rpm), Figure 6 The period of (b) is 17.9 ms (6700 rpm), Figure 6 The period of (c) is 14.64 ms (8200 rpm), Figure 6 The period of (d) is 13.31 ms (9000 rpm).

[0109] Insulate the carburetor from the engine Figure 6 (a) Compared with the case where the engine and carburetor are connected Figure 6 In (b), the amplitude of the waveform becomes significantly larger. In addition, in a device that is provided with a fuel droplet miniaturization device and is grounded together with the carburetor and the engine, Figure 6In (c), the amplitude of the waveform increases further. When the potential of the fuel droplet miniaturization device is increased by 9 V, Figure 6 (d) and Figure 6 Compared with (c), the amplitude is further increased. The increase in amplitude indicates the increase in acoustic energy.

[0110] Figure 7 The period of (a) is 8.18 ms (14700 rpm), Figure 7 The period of (b) is 8.32 ms (14400 rpm), Figure 7 The period of (c) is 8.16 ms (14700 rpm), Figure 7 The period of (d) is 8.18 ms (14700 rpm).

[0111] The amplitude of the waveform is Figure 6 Likewise from Figure 7 (a) to Figure 7 (d) Increase, the degree of increase is greater than Figure 6 More obvious.

[0112] In addition, Figure 7 (b) Figure 7 (c) and Figure 7 It is clearly observed in (d) that Figure 7 (a) The characteristic waveform of each small interval is observed only in a part. The appearance of the waveform that makes each small interval characteristic is considered to indicate that combustion occurs periodically / regularly, that is, combustion has stabilized. The stabilization of combustion brings stability of output and thus brings driving comfort.

[0113] The measurement is performed without applying any particular load to the engine. The load applied to the engine changes constantly while the car is running. If the load change is added to the output change, the output fluctuation is further amplified, and it is believed that the driving stability and comfort are impaired.

[0114] Therefore, in Figure 7 (c) Figure 7 The stabilization of combustion seen in (d) is extremely desirable.

[0115] Next, the analysis results of the power spectrum of the combustion stroke will be described.

[0116] Figure 8 The power spectrum of the combustion stroke in the medium speed range is shown. Fig. 9 The power spectrum of the combustion stroke in the high speed range is shown. All of them are data obtained by the above fitting. Figure 8 and Fig. 9 In the figure, the horizontal axis is frequency (Frequency(Hz)) and the vertical axis is power (Power).

[0117] exist Figure 8 and Fig. 9 Among them, (a) is the power spectrum in the state of the aforementioned (1) (a state in which there is no fuel droplet miniaturization device and the carburetor and the engine are insulated), and correspondingly, (b) is the power spectrum in the state of the aforementioned (2) (a state in which there is no fuel droplet miniaturization device and the carburetor and the engine are grounded), (c) is the power spectrum in the state of the aforementioned (3) (a state in which a fuel droplet miniaturization device is provided and the fuel droplet miniaturization device, the carburetor and the engine are grounded), and (d) is the power spectrum in the state of the aforementioned (4) (a state in which a fuel droplet miniaturization device is provided and the fuel droplet miniaturization device is set to 9 V and the carburetor and the engine are grounded).

[0118] Figure 8 The period of (a) is 18.9 ms (6300 rpm), Figure 8 The period of (b) is 17.9 ms (6700 rpm), Figure 8 The period of (c) is 14.64 ms (8200 rpm), Figure 8 The period of (d) is 13.31 ms (9000 rpm).

[0119] from Figure 8 (a) to Figure 8 (c) The power at frequencies around 300 Hz increases by more than 3 times. Figure 8 In (d), the power at 300 Hz decreases slightly, but the power at around 600 Hz becomes larger than the power at 300 Hz.

[0120] These increases in power indicate an increase in energy generated in the combustion stroke, that is, an increase in the combustion ratio of the fuel.

[0121] Fig. 9 The period of (a) is 8.18 ms (14700 rpm), Fig. 9 The period of (b) is 8.32 ms (14400 rpm), Fig. 9 The period of (c) is 8.16 ms (14700 rpm), Fig. 9 The period of (d) is 8.18 ms (14700 rpm).

[0122] The power at a frequency of about 900 Hz is Fig. 9 (a) Increase successively, Fig. 9 (d) becomes up to 4 times. Even in the high speed range of the engine, the increase in energy generation in the combustion stroke is significant.

[0123] In addition, the power obtained is a short-term time average value between four sections, and there is a possibility that it varies with time. Therefore, considering that the time width is selected to be as wide as possible for comparison, the power spectrum is obtained for three sections (data of rotation speed 6000 rpm-9000 rpm, including some overlap) to four sections (data of rotation speed 14000 rpm) of the measurement data (200 ms). In any case, the power increases from the state (1) to the state (4).

[0124] As such, the combustion droplet miniaturization device of the present invention can increase the energy generated in the combustion stroke of the engine. In addition, the engine equipped with the fuel droplet miniaturization device can maintain a stable high output, and the vehicle can travel comfortably.

Claims

1. A fuel droplet miniaturization device, which is a fuel droplet miniaturization device for breaking up fuel droplets supplied to an internal combustion engine, It is characterized in that The fuel droplet miniaturization device comprises: A crushing promotion component composed of a plurality of parallel arranged linear bodies, the crushing promotion component is made of a conductor or a semiconductor as a raw material; and A copper fixing frame is used to fix the two ends of the line body of the crushing promotion component. The diameter of the copper fixing frame is set to be equal to the diameter of an intake pipe that supplies the mixed gas of the fuel droplets and air to the internal combustion engine. The copper fixing frame is fixed to the intake pipe via an insulating ring at a position between an injection port of a fuel injection device that injects the fuel droplets into the intake pipe and an end of the intake pipe that supplies the mixed gas to the internal combustion engine, and the linear body of the crushing promotion component is arranged on the copper fixing frame along the cross section of the intake pipe in a manner orthogonal to the length direction of the intake pipe. The crushing promotion member is set to a higher potential than the air intake pipe via the copper fixing frame. The fuel droplets are accelerated by the electric field formed by the fragmentation promoting member and collide with the fragmentation promoting member with a high probability, and are fragmented and supplied to the internal combustion engine.

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