A carburetor and engine which can be placed vertically sideways to the engine

Abstract

The utility model relates to a carburettor and engine which can be placed laterally and vertically, comprising a carburettor body, the carburettor body comprises a float chamber and a main oil well, the carburettor body is provided with an air inlet chamber and a main air quantity hole, the float chamber is communicated with the oil inlet of the main oil well, the oil outlet of the main oil well is communicated with the air inlet chamber, the front end of the air inlet chamber is provided with the main air quantity hole, the main air quantity hole is communicated with the air inlet of the main oil well and is located at the left side of the air inlet chamber, so that the position of the main air quantity hole in the carburettor body placed laterally and vertically is higher than the oil level in the float chamber. The above technical scheme utilizes the principle of gravity, and sets the main air quantity hole at the left side of the air inlet chamber. When the carburettor is placed laterally and vertically with the engine, the main air quantity hole is located at the upper part of the carburettor body, and its position is always higher than the oil level in the float chamber. The structure is simple, and the risk of fuel leakage from the main air quantity hole is eliminated, ensuring the reliability of the next engine start.

Description

Technical Field

[0001] This utility model relates to the field of engine fuel supply technology, and in particular to a carburetor and engine that can be placed vertically to the side of the engine. Background Technology

[0002] General-purpose engines are widely used in equipment such as lawnmowers and generators. To save storage and transportation space, when the engine is not in use, the entire device needs to be placed horizontally and vertically (i.e., the oil inlet pipe faces the ground). For example... Figure 1 As shown, in this orientation, the oil level in the carburetor float chamber of an engine equipped with a conventional carburetor 2 will change. When the position of the main air volume orifice 21 is lower than the oil level X in the float chamber, fuel will leak from the main air volume orifice 21 under the influence of gravity. This not only causes fuel waste and environmental pollution, but also makes it difficult to start the engine the next time due to an overly rich air-fuel mixture. Utility Model Content

[0003] Therefore, there is a need for a carburetor and engine that can be placed vertically with the engine sideways, in order to solve the technical problem that when the engine is placed vertically with the engine sideways, fuel will easily leak from the main air volume orifice under the action of gravity and enter the intake passage, thereby causing fuel waste and environmental pollution, and making it difficult to start the engine the next time due to the excessively rich air-fuel mixture.

[0004] To achieve the above objectives, in a first aspect, this utility model provides a carburetor that can be placed vertically to the side of an engine, including a carburetor body. The carburetor body includes a float chamber and a main oil well. The carburetor body is provided with an intake chamber and a main air volume orifice. The float chamber is connected to the oil inlet of the main oil well, and the oil outlet of the main oil well is connected to the intake chamber. A main air volume orifice is provided at the front end of the intake chamber. The main air volume orifice is connected to the air inlet of the main oil well and is located on the left side of the intake chamber, so that the position of the main air volume orifice in the vertically placed carburetor body is higher than the oil level in the float chamber.

[0005] Unlike existing technologies, the above solution utilizes the principle of gravity, relocating the main airflow orifice, which was conventionally located on the right side of the intake chamber, to the left side. Therefore, when the carburetor is placed vertically with the engine, the main airflow orifice will be located at the top of the carburetor body, always above the fuel level in the float chamber. Compared to existing technologies, this solution requires no additional parts or complex modifications; it ensures the carburetor's performance in its normal operating position simply by optimizing the relative positions of the core components. Furthermore, it eliminates the risk of fuel leakage from the main airflow orifice, ensuring the reliability of the engine's next start.

[0006] As one embodiment of this utility model, the carburetor body also includes a connecting hole, through which the main air flow hole is connected to the main oil well.

[0007] Thus, by setting up a separate connecting hole to connect the main air orifice and the main oil well, greater design flexibility is provided. This structure allows the main air orifice and the main oil well to be arranged in a more optimized spatial path, which not only achieves leak-proof function but also facilitates processing and manufacturing.

[0008] As one embodiment of this utility model, the connecting hole includes a first air inlet and a second air inlet. The main air volume hole is connected to the main oil well through the first air inlet. The carburetor body also includes a sealing component, which blocks the second air inlet.

[0009] Thus, the connection hole is designed with two air inlets, a first and a second, with the second inlet sealed by a plug. This structure not only reduces the machining difficulty of the complex internal flow channel, but more importantly, by sealing the second air inlet, it ensures that the compensation air must flow in unidirectionally from the main air volume orifice, effectively preventing the entry of unclean air and guaranteeing the accuracy of air-fuel ratio control and the reliability of engine operation.

[0010] In one embodiment of this utility model, the sealing component is a ball plug, which is interference-fitted with the second air inlet.

[0011] Therefore, using a ball plug as the sealing element and achieving a seal through an interference fit is an efficient and low-cost permanent sealing solution. The smooth shape of the ball plug minimizes the impact on airflow within the intake chamber, and its reliable sealing performance ensures the effectiveness of the airflow path design and reduces airborne risks.

[0012] In one embodiment of this utility model, the sealing component is sealed to the second air inlet.

[0013] In this way, the sealing connection transforms the through hole into a closed channel that communicates only with the main air flow hole, thereby allowing the air to follow the designed flow path and preventing external air pollution.

[0014] In one embodiment of this utility model, the sealing component is a detachable sealing screw or sealing plug.

[0015] Thus, the use of removable sealing screws or plugs provides an advantage in maintainability while ensuring a tight seal. When fuel impurities cause blockage inside the main air jet orifice or connecting hole, the plug can be removed, providing a convenient entry point for cleaning and unblocking the entire air compensation passage, greatly improving the maintainability of the carburetor throughout its lifespan.

[0016] As one embodiment of this utility model, the carburetor body also includes an air filter, which is connected to the intake chamber.

[0017] In this way, the air filter can ensure the filtration effect while still having excellent ability to prevent side leakage.

[0018] To achieve the above objectives, in a second aspect, the present invention also provides an engine, including: a carburetor that can be placed vertically to the side of the engine, as provided by the inventors above.

[0019] Unlike existing technologies, the technical solution of this application ensures that, when the engine is placed sideways and vertically, the main air volume orifice remains above the oil level in the float chamber due to its elevated position. This design is simple and cost-effective, eliminates the risk of fuel leakage from the main air volume orifice, and guarantees the reliability of the engine's next start-up.

[0020] The above description of the utility model is merely an overview of the technical solution of this application. In order to enable those skilled in the art to better understand the technical solution of this application and to implement it based on the description and drawings, and to make the above-mentioned objectives and other objectives, features and advantages of this application easier to understand, the following description is provided in conjunction with the specific embodiments and drawings of this application. Attached Figure Description

[0021] The accompanying drawings are only used to illustrate the principles, implementation methods, applications, features, and effects of specific embodiments of this application and other related content, and should not be considered as limitations on this application.

[0022] In the accompanying drawings of the instruction manual:

[0023] Figure 1 A schematic diagram of the structure of a carburetor placed vertically on its side, which is part of the background technology;

[0024] Figure 2 This is a schematic diagram of the structure of a carburetor body according to an embodiment of this application;

[0025] Figure 3 for Figure 2 Sectional view of CC;

[0026] Figure 4 This is a schematic diagram of the structure of a carburetor body placed vertically on its side according to an embodiment of this application;

[0027] Figure 5 This is a cross-sectional view of the carburetor body from another perspective, according to one embodiment of this application.

[0028] Figure 6 This is a simplified structural diagram of a main air metering orifice connected to a main oil well through a connecting hole, according to an embodiment of this application.

[0029] The reference numerals used in the above figures are explained as follows:

[0030] 1-Carburetor body; 11-Float chamber; 12-Main oil well; 13-Inlet chamber; 14-Main air volume orifice; 15-Connecting hole; 151-First air inlet; 152-Second air inlet; 16-Sealing component; 2-Carburetor; 21-Main air volume orifice; X-Oil level in float chamber; Y-Highest point of oil level in float chamber; Z-Lowest point of inlet of main air volume orifice. Detailed Implementation

[0031] To illustrate the possible application scenarios, technical principles, implementable specific solutions, and achievable objectives and effects of this application in detail, the following description, in conjunction with the listed specific embodiments and accompanying drawings, provides a detailed explanation. The embodiments described herein are merely illustrative of the technical solutions of this application and are therefore intended to limit the scope of protection of this application.

[0032] In this document, the term "embodiment" means that a specific feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The term "embodiment" appearing in various places throughout the specification does not necessarily refer to the same embodiment, nor does it specifically limit its independence or connection with other embodiments. In principle, in this application, as long as there are no technical contradictions or conflicts, the technical features mentioned in each embodiment can be combined in any way to form corresponding implementable technical solutions.

[0033] Unless otherwise defined, the technical terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the use of related terms herein is merely for the purpose of describing particular embodiments and is not intended to limit this application.

[0034] In the description of this application, the term "and / or" is used to describe the logical relationship between objects, indicating that three relationships can exist. For example, A and / or B means: A exists, B exists, and A and B exist simultaneously. Additionally, the character " / " in this document generally indicates that the preceding and following objects have an "or" logical relationship.

[0035] In this application, 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 actual quantity, hierarchy or order relationship between these entities or operations.

[0036] Without further limitations, the use of terms such as “comprising,” “including,” “having,” or other similar open-ended expressions in this application is intended to cover non-exclusive inclusion, which does not exclude the presence of additional elements in a process, method, or product that includes the stated elements, such that a process, method, or product that includes a list of elements may include not only those defined elements but also other elements not expressly listed, or elements inherent to such a process, method, or product.

[0037] As understood in the Examination Guidelines, in this application, expressions such as "greater than," "less than," and "exceeding" are understood to exclude the stated number; expressions such as "above," "below," and "within" are understood to include the stated number. Furthermore, in the description of the embodiments in this application, "multiple" means two or more (including two), and similar expressions related to "multiple" are also understood in this way, such as "multiple groups" and "multiple times," unless otherwise explicitly specified.

[0038] In the description of the embodiments of this application, the space-related expressions used, such as "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "vertical," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," indicate the orientation or positional relationship based on the orientation or positional relationship shown in the specific embodiments or drawings. They are only for the purpose of describing the specific embodiments of this application or for the reader's understanding, and do not indicate or imply that the device or component referred to must have a specific position, a specific orientation, or be constructed or operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0039] Unless otherwise expressly specified or limited, the terms "installation," "connection," "linking," "fixing," and "setting," as used in the description of the embodiments of this application, should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral arrangement; it can be a direct connection or an indirect connection through an intermediate medium; it can be a relationship of two components combined together, an interaction relationship between two components, or a connection within two structures. Those skilled in the art to which this application pertains can understand the specific meaning of the above terms in the embodiments of this application according to the specific circumstances.

[0040] General-purpose engines are widely used in equipment such as lawnmowers and generators. To save storage and transportation space, when the engine is not in use, the entire device needs to be placed horizontally and vertically (i.e., the oil inlet pipe faces the ground). For example... Figure 1As shown, in this orientation, the oil level in the carburetor float chamber of an engine equipped with a conventional carburetor 2 will change. When the position of the main air volume orifice 21 is lower than the oil level X in the float chamber, fuel will leak from the main air volume orifice 21 under the influence of gravity. This not only causes fuel waste and environmental pollution, but also makes it difficult to start the engine the next time due to an overly rich air-fuel mixture.

[0041] In view of this, this application provides a carburetor that can be placed vertically to the side of an engine, including a carburetor body 1. The carburetor body 1 includes a float chamber 11 and a main oil well 12. The carburetor body 1 is provided with an intake chamber 13 and a main air volume orifice 14. The float chamber 11 is connected to the oil inlet of the main oil well 12, and the oil outlet of the main oil well 12 is connected to the intake chamber 13. The main air volume orifice 14 is provided at the front end of the intake chamber 13. The main air volume orifice 14 is connected to the air inlet of the main oil well 12 and is located on the left side of the intake chamber 13, so that the position of the main air volume orifice 14 in the vertically placed carburetor body 1 is higher than the oil level in the float chamber 11.

[0042] According to some embodiments of this application, this embodiment relates to an engine including a carburetor that can be placed vertically with the engine sideways.

[0043] As the fuel modulation center of the engine, the carburetor's core function is to precisely atomize and meter liquid fuel in response to the vacuum suction generated during the engine's intake stroke, mixing it with clean air from the air filter to create a combustible mixture with a specific air-fuel ratio for combustion in the engine cylinders. The piston movement of the engine is the primary power source for generating the working vacuum, providing the fundamental premise for the carburetor's operation. The carburetor, as a precise fuel supply and modulation unit, has its internal main well (12), metering orifice, and throat designed to accurately respond to this vacuum. When engine operating conditions change (such as changes in speed or load), the vacuum level changes accordingly. The carburetor, through its mechanical structure and fluid principles, automatically adjusts the fuel and air supply to achieve dynamic matching of mixture concentration and flow rate.

[0044] By innovatively positioning the main air intake orifice 14 on the left side of the intake chamber 13, the internal fuel passage and atmospheric compensation passage of the carburetor are kept physically isolated even under the special condition of the engine being placed laterally and vertically. This structural improvement allows the carburetor to consistently provide the engine with a clean, leak-free air-fuel mixture, fundamentally eliminating problems such as starting difficulties, incomplete combustion, or environmental pollution caused by improper fuel leakage. This ensures the engine's immediate startability and operational reliability during storage, transportation, and subsequent use.

[0045] In this application, when the engine is placed sideways and vertically, the main air volume orifice 14, due to its high spatial position, is always higher than the oil level in the float chamber 11. Its structure is simple and cost-effective, and it also eliminates the risk of fuel leakage from the main air volume orifice 14, ensuring the reliability of the engine's next start.

[0046] According to some embodiments of this application, please refer to Figures 2 to 6 This embodiment also relates to a carburetor that can be placed vertically to the side of an engine, including a carburetor body 1. The carburetor body 1 includes a float chamber 11 and a main oil well 12. The carburetor body 1 is provided with an intake chamber 13 and a main air volume orifice 14. The float chamber 11 is connected to the oil inlet of the main oil well 12, and the oil outlet of the main oil well 12 is connected to the intake chamber 13. The main air volume orifice 14 is provided at the front end of the intake chamber 13. The main air volume orifice 14 is connected to the air inlet of the main oil well 12 and is located on the left side of the intake chamber 13, so that the position of the main air volume orifice 14 in the carburetor body 1 placed vertically to the side is higher than the oil level in the float chamber 11.

[0047] The float chamber 11, main oil well 12, and air intake chamber 13 are all standard features of a carburetor. The float chamber 11 stores and stabilizes fuel, and is connected to the main oil well 12 via the main jet. The air inlet of the main oil well 12 is connected to the main air jet 14, and the fuel outlet of the main oil well 12 leads to the throat of the air intake chamber 13, where the fuel is atomized by a high-speed airflow.

[0048] like Figure 2 As shown, the main air volume orifice 14 is located on the left side of the intake chamber 13 when the carburetor body 1 is in a normal operating position. Therefore, the change in the left and right position of the main air volume orifice 14 compared to current technology does not affect the use of the carburetor in normal operating conditions. That is, in normal operating conditions, the position of the main air volume orifice 14 is always higher than the oil level in the float chamber 11. Figure 4 As shown, when the fuel injector body is placed vertically on its side, the fuel level in the float chamber 11 will be tilted. However, since the main air volume orifice 14 is located above the intake chamber 13, its position is higher than the fuel level in the float chamber 11 (i.e., the lowest point Z of the main air volume orifice inlet is higher than the highest point Y of the fuel level in the float chamber). Therefore, fuel cannot enter the main air volume orifice 14 by gravity, thus solving the fuel leakage problem.

[0049] The above technical solution utilizes the principle of gravity, modifying the main air volume orifice 14, which was conventionally located on the right side of the intake chamber 13, to be positioned on the left side. Therefore, when the carburetor is placed vertically with the engine, the main air volume orifice 14 will be located at the top of the carburetor body 1, always higher than the oil level in the float chamber 11. Compared to existing technologies, this solution requires no additional parts or complex modifications; it only optimizes the relative positions of core components to ensure the carburetor's performance in its normal operating posture. Furthermore, it eliminates the risk of fuel leakage from the main air volume orifice 14, ensuring the reliability of the engine's next start.

[0050] like Figure 3 , Figure 5 and Figure 6 As shown, the carburetor body 1 also includes a connecting hole 15, through which the main air volume hole 14 is connected to the main oil well 12.

[0051] Thus, by setting a separate connecting hole 15 to connect the main air volume orifice 14 and the main oil well 12, greater design flexibility is provided. This structure allows the main air volume orifice 14 and the main oil well 12 to be arranged in a more optimized spatial path, which not only achieves leak-proof function but also facilitates processing and manufacturing.

[0052] like Figure 5 and Figure 6 As shown, the connecting hole 15 includes a first air inlet 151 and a second air inlet 152. The main air volume hole 14 is connected to the main oil well 12 through the first air inlet 151. The carburetor body 1 also includes a sealing member 16, which seals the second air inlet 152.

[0053] In this embodiment, the connecting hole 15 is machined by inserting a machining tool into the interior through a process hole (i.e., the second air inlet 152) on the outside of the carburetor body 1. After machining, it is sealed with a sealing member 16.

[0054] Thus, the connecting hole 15 is designed with two air inlets, a first and a second, wherein the second air inlet 152 is sealed by the sealing element 16. This structure not only reduces the processing difficulty of the complex internal flow channel, but more importantly, by sealing the second air inlet 152, it ensures that the compensating air must flow in unidirectionally from the main air volume orifice 14, effectively preventing the entry of unclean air and ensuring the accuracy of air-fuel ratio control and the reliability of engine operation.

[0055] In this embodiment, the sealing component 16 is a ball plug, and the ball plug is interference-fitted with the second air inlet 152.

[0056] Thus, using a ball plug as the sealing element 16 and sealing it with an interference fit is an efficient and low-cost permanent sealing solution. The smooth shape of the ball plug minimizes the impact on the airflow in the intake chamber 13, and its reliable sealing ensures the effectiveness of the airflow path design and reduces air risks.

[0057] According to some embodiments of this application, optionally, the sealing element 16 is sealed to the second air inlet 152.

[0058] By sealing the second air inlet 152, the only correct path for compensating air is forcibly defined. Air from the main oil well 12 must first pass through the air filter, then enter the carburetor's air intake chamber 13, and only then can it flow into the main oil well 12 via the main air flow orifice 14 and the connecting hole 15.

[0059] Thus, through this sealed connection, the through hole 15 is transformed into a closed channel that communicates only with the main air flow hole 14, thereby allowing the air to follow the designed flow path and preventing external air pollution.

[0060] According to some embodiments of this application, optionally, the sealing element 16 is a removable sealing screw or sealing plug.

[0061] Thus, the use of removable sealing screws or plugs provides an advantage in maintainability while ensuring a tight seal. When fuel impurities cause blockage inside the main air volume orifice 14 or connecting orifice 15, the plug 16 can be removed, providing a convenient entry point for cleaning and unblocking the entire air compensation passage, greatly improving the maintainability of the carburetor throughout its lifespan.

[0062] According to some embodiments of this application, optionally, the carburetor body 1 also includes an air filter, which is connected to the intake chamber 13.

[0063] An air filter is used to filter the incoming air, which then enters the intake chamber 13. At the front end of the intake chamber 13, some slow-moving, high-pressure air is "captured" by the main air orifice 14. This air, after being precisely metered by the main air orifice 14, is guided to the upper part of the main oil well 12. There, it mixes with fuel drawn up from the bottom main orifice (which is typically a screw-like component with precision holes, installed at the bottom or side wall of the float chamber 11, its core function being to precisely meter and limit the fuel flow to the main oil well 12), forming a "foamed" fuel-air mixture. This fuel-air mixture is finally ejected from the main nozzle and enters the throat (the narrowest part of the intake chamber 13), where it is further atomized and pulverized by the high-speed airflow.

[0064] In this way, the air filter can ensure the filtration effect while still having excellent ability to prevent side leakage.

[0065] It should be noted that although the above embodiments have been described herein, this does not limit the scope of patent protection for this utility model. Therefore, any changes and modifications made to the embodiments described herein based on the innovative concept of this utility model, or equivalent structural or procedural transformations made using the content of this utility model's specification and drawings, directly or indirectly applying the above technical solutions to other related technical fields, are all included within the scope of patent protection for this utility model.

Claims

1. A carburetor that can be placed vertically to the side of an engine, characterized in that, The carburetor includes a carburetor body, which comprises a float chamber and a main well. The carburetor body is provided with an air intake chamber and a main air volume orifice. The float chamber is connected to the oil inlet of the main well, and the oil outlet of the main well is connected to the air intake chamber. The main air volume orifice is provided at the front end of the air intake chamber and is connected to the air inlet of the main well. It is located on the left side of the air intake chamber, so that the position of the main air volume orifice in the laterally vertically placed carburetor body is higher than the oil level in the float chamber.

2. The carburetor that can be placed vertically to the side of the engine according to claim 1, characterized in that, The carburetor body also includes a connecting hole, through which the main air volume orifice is connected to the main oil well.

3. The carburetor that can be placed vertically to the side of the engine according to claim 2, characterized in that, The connecting hole includes a first air inlet and a second air inlet. The main air volume orifice is connected to the main oil well through the first air inlet. The carburetor body also includes a sealing element, which blocks the second air inlet.

4. The carburetor that can be placed vertically to the side of the engine according to claim 3, characterized in that, The sealing component is a ball plug, which is interference-fitted with the second air inlet.

5. The carburetor that can be placed vertically to the side of the engine according to claim 3, characterized in that, The sealing component is sealed to the second air inlet.

6. The carburetor that can be placed vertically to the side of the engine according to claim 5, characterized in that, The sealing component is a removable sealing screw or sealing plug.

7. The carburetor that can be placed vertically to the side of the engine according to claim 1, characterized in that, The carburetor body also includes an air filter, which is connected to the intake chamber.

8. An engine, characterized in that, include: A carburetor that can be placed vertically to the side of the engine, as described in any one of claims 1 to 7.

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