Atomization reinforced carburetor

Abstract

The utility model discloses an atomization reinforced carburetor which comprises a nozzle, a throat and an inner throat, an outlet of the nozzle is located in the inner throat, and an airflow channel of the inner throat forms a necking opening. According to the atomization-enhanced carburetor, the negative pressure rib arranged at the throat and the inner throat are used for further enhancing atomization of sprayed fuel oil, streamline processing is carried out on the surface of the negative pressure rib, the flowing speed of air and generation of negative pressure are further enhanced, an airflow channel of the inner throat forms a Venturi structure channel, and therefore the atomization effect of the carburetor is improved. The atomization effect of fuel oil and the combustion efficiency of an engine are improved through the Venturi effect, sufficient combustion is guaranteed, fuel oil economical efficiency is improved, hydrocarbon emission is reduced, the safety of working in a closed environment is improved, and more environment friendliness and energy conservation are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of engine parts, in particular to an atomization enhanced carburetor. Background Art

[0002] The carburetor is a mechanical device that mixes a certain proportion of gasoline and air under the vacuum generated by the engine. As a precision mechanical device, the carburetor uses the kinetic energy of the inhaled air flow to atomize the fuel. The carburetor will automatically mix the corresponding concentration and output the corresponding amount of mixed gas according to the different working conditions of the engine. In order to make the mixed gas mixed more evenly, the carburetor also has the effect of atomizing the fuel for the normal operation of the machine.

[0003] In the prior art, traditional carburetors use the vacuum of the engine and the kinetic energy of the inhaled air to achieve fuel atomization. The gasoline sprayed from the fuel injector is not more fully atomized by other atomization structures, resulting in insufficient fuel atomization, low engine combustion efficiency, poor economy, and high carbon and hydrogen content in the exhaust gas, which poses a great safety hazard when used in a confined space.

[0004] Therefore, in order to solve the above problems, an atomization-enhanced carburetor for reducing emissions is needed. On the basis of the existing carburetor, its structure is optimized and improved. After the fuel injector completes the fuel injection, the sprayed fuel is further atomized to improve the atomization effect of the fuel and the combustion efficiency of the engine, ensure sufficient combustion, improve fuel economy, reduce hydrocarbon emissions, improve safety when working in a closed environment, and be more environmentally friendly and energy-saving. Utility Model Content

[0005] In view of this, the purpose of the utility model is to provide a partitioned atomization enhanced carburetor, which further enhances the atomization of the sprayed fuel after the fuel injection of the injector is completed, thereby improving the atomization effect of the fuel, improving the combustion efficiency of the engine, ensuring sufficient combustion, improving fuel economy, reducing hydrocarbon emissions, improving safety when working in a closed environment, and being more environmentally friendly and energy-saving.

[0006] The utility model discloses an atomization enhanced carburetor, which comprises a nozzle, a throat and an inner throat. The outlet of the nozzle is located in the inner throat, and the air flow channel of the inner throat forms a constriction.

[0007] Furthermore, the nozzle is located behind the smallest diameter of the inner throat opening, and the inner throat opening is arranged close to the nozzle.

[0008] Furthermore, the constriction of the air flow channel of the inner throat is formed by a Venturi structure channel.

[0009] Furthermore, the Venturi structure channel includes a contraction chamber and a diffusion chamber, the contraction chamber is used to inhale the airflow passing through the throat, and the diffusion chamber is used to mix the inhaled airflow with the fuel sprayed from the nozzle and then output it.

[0010] Furthermore, the Venturi structure channel also includes a straight section located between the contraction chamber and the diffusion chamber, the straight section is located at the point where the inner throat diameter is the smallest, and the nozzle is located between the diffusion chamber and the straight section.

[0011] Furthermore, the normal line of the wall surface of the contraction cavity is an inwardly convex arc, the normal line of the diffusion cavity is a straight line, and the length of the contraction cavity along the air intake direction is smaller than the length of the diffuser along the air intake direction.

[0012] Furthermore, the length ratio of the contraction chamber, the straight chamber and the diffusion chamber along the air intake direction is 3:1.5:1.

[0013] Furthermore, a negative pressure rib is provided between the throat and the inner throat along the radial direction of the throat to separate the airflow. The transverse thickness of the negative pressure rib gradually increases in the air intake direction to a maximum transverse thickness. The cross-section of the negative pressure rib presents a shape with a smooth transition.

[0014] Furthermore, the negative pressure rib faces away from the nozzle and corresponds to the outlet of the nozzle.

[0015] Beneficial effects of the utility model: the atomization enhanced carburetor of the utility model utilizes the negative pressure ribs and the inner throat arranged at the throat to further enhance the atomization of the sprayed fuel, streamlines the surface of the negative pressure ribs to further enhance the flow velocity of the air and the generation of negative pressure, and the air flow channel of the inner throat forms a Venturi structure channel, which utilizes the Venturi effect to enhance the atomization effect of the fuel and the combustion efficiency of the engine, ensures sufficient combustion, improves fuel economy, reduces hydrocarbon emissions, improves safety when working in a closed environment, and is more environmentally friendly and energy-saving. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The utility model is further described below in conjunction with the accompanying drawings and embodiments:

[0017] Figure 1 It is a side sectional view of the utility model;

[0018] Figure 2 It is a structural sectional view of the utility model;

[0019] Figure 3 It is a top view of the utility model.

[0020] Numbers in the figure: 1, nozzle; 2, inner throat; 3, negative pressure rib; 4, choke; 5, throttle; 6, contraction chamber; 7, intake chamber; 8, straight section. DETAILED DESCRIPTION

[0021] Figure 1 It is a structural schematic diagram of the utility model. Figure 2 It is a schematic diagram of the structure of the blocking rib. In the description of the present utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate the orientation or position relationship based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0022] like Figure 1 As shown, the utility model provides an atomization enhanced carburetor, comprising a nozzle 1, a throat and an inner throat 2, wherein the outlet of the nozzle 1 is located in the inner throat 2, and the air flow channel of the inner throat 2 forms a constriction; the carburetor body is provided with an air intake chamber, a throat and a vacuum chamber, wherein the throat is located between the air intake chamber and the vacuum chamber, and fuel is sprayed at the throat through the outlet of the nozzle 1, and the fuel is mixed with air and then transported to the engine cylinder for compression combustion to do work, and during the intake stroke, a partial vacuum is formed in the cylinder, and external air is sucked in, and when the air flow passes through the throat of the carburetor, the flow rate increases and the pressure decreases, and since the pressure at the throat is less than the pressure in the float chamber, the fuel is sucked out from the nozzle and crushed into tiny particles by the high-speed air flow. This increases the volatilization area of ​​the fuel, allowing the gasoline and air to quickly mix and atomize to form a combustible mixed gas, which is sucked into the cylinder for combustion; a choke 4 and a throttle 5 are also provided in the throat, and the choke 4 and the throttle 5 are respectively located at the two ends of the throat, the opening and closing size of the choke 4 is used to control the amount of air sucked into the intake chamber, and the opening and closing size of the throttle 5 is used to control the amount of fuel atomized gas sucked into the engine cylinder, the outlet of the nozzle 1 is penetrated through the inner throat 2 and connected thereto, the atomization enhanced carburetor can improve the atomization effect of the fuel, and the size of the inner throat 2 is determined according to the model and displacement of the carburetor.

[0023] In this embodiment, the nozzle 1 is located behind the smallest diameter of the inner throat opening 2; Figure 1As shown, during the operation of the carburetor, air rushes through the throat of the carburetor to generate suction, sucking the fuel from the float chamber and spraying it through the nozzle to atomize it. Since the air flow channel of the inner throat 2 is a constriction, when the air flows in the inner throat 2, at the narrowest part of the inner throat 2, the dynamic pressure of the air reaches the maximum value, and the static pressure reaches the minimum value. The speed of the air is accelerated due to the reduction of the flow cross-sectional area. The air undergoes the constriction process of the inner throat at the same time, so the pressure also decreases at the same time, thereby generating a pressure difference. The nozzle 1 is inserted at the narrowest part of the inner throat 2, and the dynamic pressure of the air reaches the maximum value, which can make the fuel and air better mixed and fully atomized. The narrowest part of the inner throat 2 is the smallest constriction diameter. After the outlet of the nozzle 1 is set at the smallest constriction diameter, a better atomization effect can be obtained. The position with the best atomization effect is that the distance between the central axis of the outlet of the nozzle 1 and the smallest constriction diameter is 2mm~2.0271mm.

[0024] In this embodiment, the air flow channel of the inner throat 2 is formed by a constriction to form a Venturi structure channel; according to the Venturi effect, when air blows over an obstacle, the air pressure near the port above the leeward side of the obstacle is relatively low, thereby generating an adsorption effect and causing the air to flow, reducing the cross-sectional area of ​​the air flow, thereby accelerating the air flow rate and achieving a maximum dynamic pressure of the air at the minimum cross-sectional area of ​​the air flow.

[0025] In this embodiment, the Venturi structure channel includes a contraction chamber 6 and a diffusion chamber 7. The contraction chamber 6 is used to inhale the airflow passing through the throat, and the diffusion chamber 7 is used to mix the inhaled airflow with the fuel sprayed from the nozzle 1 and then output it; the contraction chamber 6 is the one whose diameter gradually decreases along the airflow direction in the inner throat 2, and the diffusion chamber 7 is the one whose diameter gradually expands along the airflow direction. The compressed air in the contraction chamber 6 enters from the entrance of the Venturi structure channel. As the flow cross-sectional area gradually decreases, the pressure of the compressed air decreases and the flow rate increases. At this time, a vacuum is generated at the inlet of the contraction chamber 6, causing the surrounding air to be inhaled into the contraction chamber 6 of the Venturi structure channel, and flows into the diffusion chamber 7 together with the compressed air to reduce the flow rate of the gas.

[0026] In this embodiment, the normal of the wall of the contraction chamber 6 is an inwardly convex arc, the normal of the diffusion chamber 7 is a straight line, and the length of the contraction chamber 6 along the air intake direction is smaller than the length of the diffusion chamber 7 along the air intake direction; the normal of the wall of the contraction chamber 6 is an inwardly convex arc, which is convex inwardly along the radial direction of the contraction chamber 6, and the cross-section of the inner wall of the contraction chamber 6 adopts an arc-shaped transition, which can reduce the pressure loss while better controlling the flow direction of the air, and can also form a contraction chamber 6 with a gradually decreasing diameter; the cross-section of the outlet of the diffusion chamber 7 is a triangle protruding along the air intake direction, which can avoid sticking due to contact with the inner throat during the opening and closing process of the throttle valve 5, and other cross-sectional forms that avoid contact with the throttle valve 5 can also be adopted, which will not be repeated here.

[0027] In this embodiment, the length ratio of the contraction chamber 6, the straight section 8 and the diffusion chamber 7 along the intake direction is 3:1.5:1; the adjustment of the length ratio can enable the inner throat to achieve a better atomization effect on the fuel, and the atomization effect achieved by the length ratio parameter of 3:1.5:1 is better.

[0028] In this embodiment, a negative pressure rib 3 is provided between the throat and the inner throat 2 along the radial direction of the throat to separate the airflow. The transverse thickness of the negative pressure rib 3 gradually increases in the air intake direction to the maximum transverse thickness. The cross-section of the negative pressure rib 3 presents a shape with a smooth transition. The edges of the negative pressure rib 3 adopt an arc transition, and a smooth curved surface can also be used to process the edges. The arc transition or smooth curved surface refers to a streamlined appearance. The resistance encountered by the negative pressure rib 3 when moving in the fluid at the throat is caused by two reasons: internal friction and vortex. When the air flow rate is small, the size of the resistance is mainly determined by the internal friction, and when the air flow rate is large, it is mainly determined by the vortex. The faster the flow rate, the greater the effect of the vortex. The protruding surface of the negative pressure rib 3 on the air inlet side is processed in a streamlined manner, which can effectively avoid the formation of vortices and reduce the air resistance generated when the air contacts the negative pressure rib 3. According to Bernoulli's principle, in isohyptical flow, the greater the flow rate, the smaller the pressure. When the air inlet side surface of the negative pressure rib 3 is processed with a smooth curved surface, the pressure is small where the air flow rate is faster on the surface of the negative pressure rib 3, and the pressure is large where the air flow rate is slower on the surface of the negative pressure rib 3. After the air flows from the air inlet cavity into the throat and contacts the negative pressure rib 3, negative pressure can be formed on the negative pressure rib 3 through the negative pressure rib 3. When used in conjunction with the inner throat 2, the air flow rate can be increased while the oil output can be increased, thereby improving the oil output and atomization efficiency. The negative pressure rib 3 and the inner throat 2 can be integrally formed in the throat. The corresponding negative pressure rib 3 and the inner throat 2 can be selected according to the model and displacement of different carburetors, which is convenient for production and assembly.

[0029] The utility model discloses an enhanced atomization structure for reducing carburetor emissions. By optimizing and improving the structure of an existing carburetor, the enhanced atomization of the present embodiment is performed on the sprayed fuel after the fuel injection of the fuel injector is completed, thereby improving the atomization effect of the fuel, improving the combustion efficiency of the engine, ensuring sufficient combustion, improving fuel economy, reducing hydrocarbon emissions, improving safety when working in a closed environment, and being more environmentally friendly and energy-saving.

[0030] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. An atomization enhanced carburetor, characterized in that: It comprises a nozzle, a throat and an inner throat, wherein the outlet of the nozzle is located in the inner throat, and the air flow channel of the inner throat forms a constriction.

2. The atomization enhanced carburetor according to claim 1, characterized in that: The nozzle is located behind the smallest diameter of the inner throat opening, and the inner throat opening is arranged close to the nozzle.

3. The atomization enhanced carburetor according to claim 1, characterized in that: The air flow channel constriction of the inner throat is formed by a Venturi structure channel.

4. The atomization enhanced carburetor according to claim 3, characterized in that: The venturi structure channel includes a contraction chamber and a diffusion chamber. The contraction chamber is used to inhale the airflow passing through the throat, and the diffusion chamber is used to mix the inhaled airflow with the fuel sprayed from the nozzle and then output it.

5. The atomization enhanced carburetor according to claim 4, characterized in that: The venturi structure channel also includes a straight section between the contraction chamber and the diffusion chamber, the straight section is located at the position where the inner throat diameter is the smallest, and the nozzle is located between the diffusion chamber and the straight section.

6. The atomization enhanced carburetor according to claim 4, characterized in that: The normal line of the wall surface of the contraction chamber is an inwardly convex arc, the normal line of the diffusion chamber is a straight line, and the length of the contraction chamber along the air intake direction is smaller than the length of the diffusion chamber along the air intake direction.

7. The atomization enhanced carburetor according to claim 6, characterized in that: The length ratio of the contraction cavity, the straight cavity and the diffusion cavity along the air intake direction is 3:1.5:

1.

8. The atomization enhanced carburetor according to claim 1, characterized in that: A negative pressure rib is provided between the throat and the inner throat along the radial direction of the throat to separate the airflow. The transverse thickness of the negative pressure rib gradually increases in the air intake direction to the maximum transverse thickness. The cross-section of the negative pressure rib presents a smooth transition in shape.

9. The atomization enhanced carburetor according to claim 8, characterized in that: The negative pressure rib faces away from the nozzle and corresponds to the outlet of the nozzle.

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