A carburetor with fast low temperature starting

Abstract

The utility model discloses a quick low temperature starting carburetor relates to carburetor technical field, including floater chamber and drive component, the middle part fixedly connected with floater arm in the bottom wall of floater chamber, the middle part sliding connection of floater arm has floater ball, the floater ball is the spherical structure of inside hollow, the top fixedly connected with limit sensor of floater arm, the utility model discloses the cooperation setting of heating plate and heat conduction plate can promote the fuel temperature in floater chamber quickly, solve the problem that low temperature fuel viscosity is big, atomizes the poor, make the engine start -up can obtain the qualified combustible mixture quickly, shorten the start -up time, through the linkage setting of floater ball, limit sensor and oil pump body, when personnel operating device uses, floater ball along with oil level rise and fall slide along floater arm, can trigger oil pump body start -stop after reaching limit sensor, realize oil level accurate control, avoid the oil level anomaly that traditional mechanical needle valve stagnation leads to, guarantee device stable operation.

Description

Technical Field

[0001] This utility model relates to the field of carburetor technology, specifically a carburetor for rapid low-temperature start-up. Background Technology

[0002] A carburetor designed for rapid cold starts is a specialized carburetor that addresses the challenges of starting the engine in low-temperature environments by optimizing the design through special structural features or auxiliary technologies. This is based on the core function of a traditional carburetor: "atomizing fuel and mixing it with air to form a combustible mixture."

[0003] An existing carburetor with rapid low-temperature start-up, when in use, (1) In low temperature environment, the fuel viscosity increases and the fluidity decreases, which can easily lead to insufficient fuel atomization in the float chamber, uneven air-fuel mixture concentration when the engine starts, and problems such as difficulty in starting or unstable idling speed. (2) Traditional carburetors rely on mechanical needle valves to control fuel level. At low temperatures, the needle valve is prone to failure due to fuel condensation or component jamming, resulting in excessively high or low fuel levels. At the same time, they lack an active heating structure, making it difficult to quickly raise the fuel temperature to meet the low-temperature start-up requirements.

[0004] To address the above problems, this utility model provides a carburetor for rapid low-temperature start-up. Utility Model Content

[0005] The purpose of this invention is to provide a carburetor that can start quickly at low temperatures. This invention can improve the fuel temperature by actively heating, accurately control the fuel level and optimize the fuel-air mixture, so as to achieve rapid start and stable operation in low-temperature environments, thereby solving the problems of poor fuel atomization, difficulty in starting and failure of fuel level control in existing carburetors at low temperatures.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a carburetor for rapid low-temperature start-up, comprising a float chamber and a drive assembly, wherein a float arm is fixedly connected to the middle of the bottom wall of the float chamber, a float ball is slidably connected to the middle of the float arm, the float ball is a hollow spherical structure, a limit sensor is fixedly connected to the top of the float arm, and a drive assembly is fixedly connected to one side of the bottom surface of the float chamber, the drive assembly comprising a protective box, and an oil pump body is fixedly connected inside the protective box.

[0007] Furthermore, a heat-conducting plate is fixedly connected to the bottom of the float chamber, and a heating plate is fixedly connected to the bottom of the heat-conducting plate. This achieves the effect of generating heat through the heating plate and evenly transferring it to the inside of the float chamber through the heat-conducting plate, thereby rapidly increasing the fuel temperature, reducing fuel viscosity, preventing fuel from condensing at low temperatures, and ensuring fuel fluidity.

[0008] Furthermore, a heat-conducting plate is fixedly connected to the bottom of the float chamber, and a heating plate is fixedly connected to the bottom of the heat-conducting plate. This achieves the effect of generating heat through the heating plate and evenly transferring it to the inside of the float chamber through the heat-conducting plate, thereby rapidly increasing the fuel temperature, reducing fuel viscosity, preventing fuel from condensing at low temperatures, and ensuring fuel fluidity.

[0009] Furthermore, a throat is fixedly connected to one side of the bottom of the float chamber, and a nozzle is fixedly connected inside the throat. This achieves the precise delivery of the heated fuel in the float chamber to the throat, utilizing the Venturi effect of the throat to fully mix the fuel with air, improve the atomization effect, and provide the engine with a combustible mixture of suitable concentration.

[0010] Furthermore, a connecting pipe is fixedly connected to one side of the surface of the float chamber, and an intake manifold is fixedly connected inside the connecting pipe. This achieves the purpose of establishing a passage between the float chamber and the intake manifold through the connecting pipe, so that the atomized combustible mixture can be stably delivered to the engine cylinder. At the same time, the intake manifold can guide outside air in to supplement the amount of air required for mixing.

[0011] Furthermore, the intake manifold is provided with an idle air volume orifice, and a throttle valve is fixedly connected to the top of the connecting pipe surface, so that air is supplemented through the idle air volume orifice when idling, avoiding an overly rich air-fuel mixture; the throttle valve can control the intake air volume by adjusting the opening degree, adapting to the power demand of the engine under different operating conditions (such as starting, idling, and acceleration).

[0012] Furthermore, an inlet pipe is connected to one side of the bottom of the oil pump body, and a refueling pipe is connected to the other side of the bottom of the oil pump body. This achieves the function of drawing fuel from the external fuel tank through the inlet pipe, pressurizing it through the oil pump body, and then delivering it to the float chamber through the refueling pipe, thereby realizing active fuel replenishment and avoiding insufficient fuel supply caused by slow fuel flow at low temperatures.

[0013] Furthermore, the float chamber is fixedly connected to an outer shell, and a protective plate is fixedly connected to one side of the outer shell. This achieves the effect of the outer shell isolating the float chamber from the influence of the external low temperature environment and reducing heat loss; the protective plate can protect the drive components, connecting pipes and other components from external collisions or dust corrosion, and extend the service life of the device.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows: This utility model provides a carburetor for rapid low-temperature start-up. (1) By combining the heating plate and the heat-conducting plate, the fuel temperature in the float chamber can be quickly increased when the personnel operate the device, solving the problem of high viscosity and poor atomization of low temperature fuel, so that a qualified combustible mixture can be obtained quickly when the engine starts, and the start-up time can be shortened.

[0015] (2) By linking the float ball, limit sensor and oil pump body, when the device is operated by personnel, the float ball slides along the float arm as the oil level rises and falls. After touching the limit sensor, it can trigger the oil pump body to start and stop, so as to achieve precise oil level control, avoid the abnormal oil level caused by the jamming of traditional mechanical needle valve, and ensure the stable operation of the device. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the device of this utility model; Figure 2 This is a schematic diagram of the internal structure of the float chamber of this utility model; Figure 3 This is a schematic diagram of the carburetor structure of this utility model; Figure 4 This is a schematic diagram of the outer shell structure of the device of this utility model; Figure 5 This is a schematic diagram of the bottom of the float chamber of this utility model.

[0017] In the diagram: 1. Float chamber; 2. Drive assembly; 201. Protective box; 202. Oil pump body; 203. Oil inlet pipe; 204. Oil filling pipe; 3. Float arm; 4. Float ball; 5. Limit sensor; 6. Protective plate; 7. Heat conduction plate; 8. Heating plate; 9. Throat pipe; 10. Nozzle; 11. Connecting pipe; 12. Intake manifold; 13. Throttle valve; 14. Housing. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] To solve the problem of how to effectively position and adjust the technology, such as Figure 1-5 As shown, the following preferred technical solutions are provided: A carburetor for rapid low-temperature start-up includes a float chamber 1 and a drive assembly 2. A float arm 3 is fixedly connected to the middle of the bottom wall of the float chamber 1, and a float ball 4 is slidably connected to the middle of the float arm 3. The float ball 4 is a hollow spherical structure. A limit sensor 5 is fixedly connected to the top of the float arm 3. The drive assembly 2 is fixedly connected to one side of the bottom surface of the float chamber 1. The drive assembly 2 includes a protective box 201, and an oil pump body 202 is fixedly connected inside the protective box 201.

[0020] Specifically, when operating the device, the operator first activates the heating plate 8, and the heat is transferred to the float chamber 1 via the heat conduction plate 7 to preheat the internal fuel. Simultaneously, the fuel pump body 202 is activated, drawing external fuel through the fuel inlet pipe 203 and delivering it to the float chamber 1 via the fuel filler pipe 204. As the fuel level rises, the float ball 4 slides upward along the float arm 3. When it touches the limit sensor 5, the limit sensor 5 sends a signal to the fuel pump body 202, stopping the fuel supply and completing the fuel replenishment and level calibration of the float chamber 1. When the engine starts, the high-speed airflow in the throat pipe 9 generates negative pressure. The preheated fuel in the float chamber 1 is injected into the throat pipe 9 through the nozzle 10, mixing with air to form a combustible mixture, which is then delivered to the cylinders through the connecting pipe 11 and the intake manifold 12. At idle, the idle air metering orifice of the intake manifold 12 replenishes air, and the throttle valve 13 regulates the intake air volume to ensure stable engine operation.

[0021] Furthermore, such as Figure 5 As shown, the following preferred technical solutions are provided: A heat-conducting plate 7 is fixedly connected to the bottom of the float chamber 1, and a heating plate 8 is fixedly connected to the bottom of the heat-conducting plate 7. The purpose of this design is to utilize the high thermal conductivity of the heat-conducting plate 7 to make the heat of the heating plate 8 evenly cover the bottom of the float chamber 1, avoid local overheating that could lead to fuel deterioration, and at the same time quickly reduce fuel viscosity to ensure that the fuel can smoothly enter the nozzle 10.

[0022] Furthermore, such as Figure 2 As shown, the following preferred technical solutions are provided: A throttle 9 is fixedly connected to one side of the bottom of the float chamber 1, and a nozzle 10 is fixedly connected inside the throttle 9. The purpose of this design is to align the outlet of the nozzle 10 with the narrowest part (throttle) of the throttle 9, so as to maximize the use of the Venturi effect, so that the fuel is fully torn and atomized by the high-speed airflow after being injected, improve the uniformity of the air-fuel mixture, and adapt to the engine's demand for a rich air-fuel mixture when starting at low temperatures.

[0023] Furthermore, such as Figure 1 As shown, the following preferred technical solutions are provided: A connecting pipe 11 is fixedly connected to one side of the surface of the float chamber 1, and an intake manifold 12 is fixedly connected inside the connecting pipe 11. The purpose of this design is to prevent the air-fuel mixture from leaking or coming into contact with cold air during the delivery process, thereby reducing heat loss. The intake manifold 12 can split the air to ensure that each cylinder can get an equal amount of air-fuel mixture, thereby improving the smoothness of engine operation.

[0024] Furthermore, such as Figure 1 As shown, the following preferred technical solutions are provided: The intake manifold 12 has an idle air volume orifice, and the top of the connecting pipe 11 is fixedly connected to the throttle valve 13. The purpose of this design is to allow the idle air volume orifice to replenish air and adjust the air-fuel mixture concentration to the optimal idle ratio to prevent the engine from stalling. The throttle valve 13 precisely controls the intake air volume by changing the opening and closing angle of the valve plate to meet the different power requirements of the engine from start-up to acceleration.

[0025] Furthermore, such as Figure 1 As shown, the following preferred technical solutions are provided: One side of the bottom of the oil pump body 202 is connected to the oil inlet pipe 203, and the other side of the bottom of the oil pump body 202 is connected to the fuel filling pipe 204. The purpose of this design is that the oil inlet pipe 203 can go deep into the bottom of the external fuel tank to ensure that sufficient fuel can be drawn; the fuel filling pipe 204 extends directly into the float chamber 1 to reduce the fuel delivery path and avoid fuel stagnation and condensation in the pipe at low temperatures.

[0026] Furthermore, such as Figure 4 As shown, the following preferred technical solutions are provided: The float chamber 1 is fixedly connected to the outside of the outer shell 14, and a protective plate 6 is fixedly connected to one side of the outer shell 14. The purpose of this design is that the outer shell 14 is made of heat insulation material, which can reduce the heat loss from the float chamber 1 to the outside and maintain the fuel temperature. The protective plate 6 is made of metal, which can prevent external collisions from damaging the drive component 2 and the connecting pipe 11, and at the same time prevent dust from entering the device and affecting the operation of the components.

[0027] Working principle: Before low-temperature start-up, the heating plate 8 is activated, and heat is transferred to the float chamber 1 via the heat conduction plate 7 to preheat the residual fuel inside. Then, the fuel pump body 202 is activated, drawing fuel from the external fuel tank through the fuel inlet pipe 203 and pressurizing it through the fuel filling pipe 204 to deliver it to the float chamber 1. The fuel level in the float chamber 1 rises, causing the float ball 4 to slide upward along the float arm 3. When the float ball 4 touches the limit sensor 5, the limit sensor 5 sends a stop signal, the fuel pump body 202 stops supplying fuel, and the fuel level stabilizes at the set height. When the engine starts, the intake system drives airflow through the throat pipe 9, creating negative pressure at the throat of the throat pipe 9. The preheated fuel in the float chamber 1 is injected into the throat pipe 9 through the nozzle 10, mixing with the high-speed air to form an atomized mixture, which is then delivered to the engine cylinders through the connecting pipe 11 and the intake manifold 12. During idling, the idle air orifice of the intake manifold 12 replenishes air, and the throttle valve 13 remains at a small opening to adjust the air-fuel mixture to a stable idling range. During acceleration, the throttle valve 13 opens wider, increasing the intake air volume, and the injector 10 simultaneously delivers more fuel to meet power demands. The outer casing 14 isolates the system from low external temperatures, and the protective plate 6 protects the components, enabling rapid start-up and stable operation at low temperatures.

[0028] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0029] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A carburetor for rapid low-temperature start-up, comprising a float chamber (1) and a drive assembly (2), characterized in that: A float arm (3) is fixedly connected to the middle of the bottom wall of the float chamber (1), and a float ball (4) is slidably connected to the middle of the float arm (3). The float ball (4) is a hollow spherical structure. A limit sensor (5) is fixedly connected to the top of the float arm (3). A drive assembly (2) is fixedly connected to one side of the bottom of the surface of the float chamber (1). The drive assembly (2) includes a protective box (201). An oil pump body (202) is fixedly connected inside the protective box (201).

2. The carburetor for rapid low-temperature start-up according to claim 1, characterized in that: A heat-conducting plate (7) is fixedly connected to the bottom of the float chamber (1), and a heating plate (8) is fixedly connected to the bottom of the heat-conducting plate (7).

3. The carburetor for rapid low-temperature start-up according to claim 1, characterized in that: A throat tube (9) is fixedly connected to one side of the bottom of the float chamber (1), and a nozzle (10) is fixedly connected inside the throat tube (9).

4. A carburetor for rapid low-temperature start-up according to claim 1, characterized in that: A connecting pipe (11) is fixedly connected to one side of the surface of the float chamber (1), and an intake manifold (12) is fixedly connected inside the connecting pipe (11).

5. A carburetor for rapid low-temperature start-up according to claim 4, characterized in that: The intake manifold (12) has an idle air volume hole, and a throttle valve (13) is fixedly connected to the top of the surface of the connecting pipe (11).

6. A carburetor for rapid low-temperature start-up according to claim 1, characterized in that: An oil inlet pipe (203) is connected through one side of the bottom of the oil pump body (202), and an oil filling pipe (204) is connected through the other side of the bottom of the oil pump body (202).

7. A carburetor for rapid low-temperature start-up according to claim 1, characterized in that: The float chamber (1) is fixedly connected to the outside of the outer shell (14), and a protective plate (6) is fixedly connected to one side of the outer shell (14).

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