Full-working-condition gas carburetor

Abstract

The utility model discloses an all-working-condition gas carburetor which comprises a carburetor body, a gas inlet chamber, a throat opening and a mixing chamber are arranged in the carburetor body, and the throat opening is arranged between the gas inlet chamber and the mixing chamber. A main fuel gas hole and at least two auxiliary fuel gas holes are formed between the fuel gas transition cavity and the mixing chamber in a communicating mode, and the auxiliary fuel gas holes are used for assisting the main fuel gas hole to introduce fuel gas into the mixing chamber under different working conditions; the full-working-condition fuel gas carburetor can supplement gas to an engine in the medium-low load section state of the engine, so that the requirements of the engine on various working conditions in the medium-low load section state are met, the defect of insufficient gas inlet in the medium-low load section state is overcome, meanwhile, fuel gas and air can be mixed more uniformly, the combustion efficiency is improved, and the service life of the engine is prolonged. The flow control of gas is finer so as to meet different combustion requirements, the structure is simple, and machining is convenient.

Description

Technical Field

[0001] This utility model relates to the field of carburetor technology, and in particular to a gas carburetor for all operating conditions. Background Technology

[0002] A carburetor is a precision mechanical device that atomizes a specific ratio of gasoline or fuel gas with air under the vacuum generated by the engine. The carburetor body consists of an intake chamber, a mixing chamber, and a throat connecting the two. At the intake end, there is a choke mechanism (choke shaft and choke) that controls the amount of air entering the engine, allowing the carburetor to automatically adjust the air-fuel mixture concentration according to the engine's operating conditions.

[0003] In existing technologies, when the engine is under low to medium load conditions, the throttle opening of the gas carburetor is 50% to 10%. Under the engine's operating negative pressure, the amount of gas drawn in through the throttle gap decreases, leading to unstable operation under low to medium load conditions. Ordinary gas carburetors cannot meet the usage requirements. To meet the various operating conditions of the engine under low to medium load conditions, most gas carburetors have multiple large-area combustion ports on the carburetor body, thereby increasing the amount of gas drawn into the mixing chamber through the throttle gap under the engine's operating negative pressure. However, multiple large-area combustion ports cannot allow for more uniform mixing of gas and air, resulting in lower combustion efficiency and incomplete combustion, leading to energy waste.

[0004] Therefore, there is an urgent need to develop a full-condition gas carburetor that can supplement air to the engine under low and medium load conditions, thereby meeting the various operating conditions of the engine under low and medium load conditions, solving the defect of insufficient air intake under low and medium load conditions, and at the same time, allowing the gas and air to mix more evenly, improving combustion efficiency, and allowing for more precise control of gas flow to adapt to different combustion needs. It should also have a simple structure and be easy to manufacture. Utility Model Content

[0005] In view of this, the purpose of this utility model is to provide a full-condition gas carburetor that can supplement the engine with air under low and medium load conditions, thereby meeting the various operating conditions of the engine under low and medium load conditions, solving the defect of insufficient air intake under low and medium load conditions, and at the same time, enabling more uniform mixing of gas and air, improving combustion efficiency, and providing more precise control of gas flow to adapt to different combustion needs. It has a simple structure and is easy to manufacture.

[0006] The present invention relates to a full-condition gas carburetor, comprising a carburetor body, wherein the carburetor body is provided with an intake chamber, a throat, and a mixing chamber, and the throat is disposed between the intake chamber and the mixing chamber.

[0007] It also includes a gas transition chamber, and a main gas port and at least two auxiliary gas ports are provided between the gas transition chamber and the mixing chamber. The auxiliary gas ports are used to assist the main gas port in introducing gas into the mixing chamber under different operating conditions.

[0008] Furthermore, the ratio of the total flow area of ​​the auxiliary gas orifice to the flow area of ​​the main gas orifice is approximately 0.25 to 0.8.

[0009] Furthermore, a throttle valve is provided at the front end of the mixing chamber; the carburetor body is also provided with an idle speed passage, one end of which is connected to the gas transition chamber, and the other end extends to the rear of the throttle valve and communicates with the mixing chamber.

[0010] Furthermore, the main gas outlet is connected to the top of the mixing chamber wall, and the outlet of the main gas outlet faces away from the throat.

[0011] Furthermore, the outlet of the main gas vent is located at the junction of the throat and the mixing chamber.

[0012] Furthermore, the gas transition chamber is provided with an air inlet, and the air inlet is connected to an air inlet pipe for conveying gas.

[0013] Furthermore, the flow area inside the gas transition chamber is 1.5 to 2 times the flow area of ​​the air inlet pipe.

[0014] Furthermore, the outlet of the auxiliary gas vent is connected to the inner wall of the mixing chamber, and the outlet of the auxiliary gas vent faces away from the throat.

[0015] Furthermore, the outlet of the auxiliary gas port is located at the junction of the throat and the mixing chamber, and the outlet of the auxiliary gas port is close to the opening side of the throttle valve.

[0016] Furthermore, an injection port is provided at the throat, which is used to inject fuel.

[0017] The beneficial effects of this utility model are as follows: The all-condition gas carburetor of this utility model can supplement the engine with air under low and medium load conditions, thereby meeting the various operating conditions of the engine under low and medium load conditions, solving the defect of insufficient air intake under low and medium load conditions, and at the same time, it can make the gas and air mix more evenly, improve combustion efficiency, and make the gas flow control more precise to adapt to different combustion needs. It has a simple structure and is easy to process. Attached Figure Description

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0019] Figure 1 This is a schematic diagram of the structure of this utility model;

[0020] Figure 2 This is a top view of the present invention;

[0021] Figure 3 A cross-sectional view of this utility model Figure I ;

[0022] Figure 4 A cross-sectional view of this utility model Figure II ;

[0023] Figure 5 This is a schematic diagram of the idle speed channel of this utility model.

[0024] The following are the labels in the diagram: 1. Carburetor body; 2. Intake chamber; 3. Throat; 4. Mixing chamber; 5. Gas transition chamber; 501. Main gas port; 502. Secondary gas port; 6. Throttle valve; 7. Intake port; 8. Intake pipe; 9. Fuel injection port; 10. Idle speed passage. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0026] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0027] Figure 1 This is a schematic diagram of the structure of this utility model. Figure 2 for, Figure 3As shown in the figure: A full-condition gas carburetor includes a carburetor body 1, which has an intake chamber 2, a throat 3, and a mixing chamber 4. The throat 3 is located between the intake chamber 2 and the mixing chamber 4. It also includes a gas transition chamber 5, which connects the gas transition chamber 5 and the mixing chamber 4 and has a main gas port 501 and at least two auxiliary gas ports 502. The auxiliary gas ports 502 are used to assist the main gas port 501 in introducing gas into the mixing chamber under different operating conditions. The carburetor disclosed in this technical solution is an all-condition gas carburetor. Therefore, a gas transition chamber 5 is provided on the carburetor body 11. A main gas port 501 and multiple auxiliary gas ports 502 are provided in the gas transition chamber 5. The different operating conditions described in this document are explained as follows: Under low-to-medium load conditions, the throttle opening is small, and the engine requires insufficient intake air. Therefore, while the main gas port 501 intakes air into the mixing chamber 4, multiple auxiliary gas ports 502 also intake air into the mixing chamber 4, assisting the main gas port 501 intake and increasing the gas volume. This increases the amount of gas drawn in through the throttle gap under low-to-medium load conditions. When the gas is directly ejected from the main gas port 501 and multiple auxiliary gas ports 502, it may impact the mixing chamber 4. The gas transition chamber 5 can buffer the gas ejected from the intake pipe 8, allowing the gas to pass through the main gas port 501 and multiple auxiliary gas ports 502 more smoothly. The auxiliary combustion gas orifice 502 reduces the impact on the mixing chamber 4 when it is ejected, thus reducing the adverse effects of gas dynamics on the mixing process. The combustion gas transition chamber 5 helps stabilize the gas flow and reduces uneven gas mixture concentration entering the mixing chamber 4 due to airflow fluctuations. The combustion gas transition chamber 5 can also reduce noise and vibration generated during gas flow, improving the smoothness of engine operation. Under different engine operating conditions, the combustion gas transition chamber 5 can help the carburetor adapt better, such as providing appropriate gas into the mixing chamber 4 during idling, acceleration, or full-load operation, improving engine power output and fuel economy. The number of auxiliary combustion gas orifices 502 can be adjusted according to different carburetor models to ensure that different carburetor models can supplement the engine with gas during engine idling, thereby meeting various operating conditions of the engine at idle, and has strong applicability.

[0028] In this embodiment, the top of the carburetor body 1 has a throttle valve shaft hole 6. The gas transition chamber 5 is disposed close to the throttle valve shaft hole 6 on the top of the carburetor body 1 and is integrally formed with the carburetor body 1. The gas transition chamber 5 is disposed close to the throttle valve shaft hole 6, which ensures that the gas transition chamber 5 is above the mixing chamber 4. This allows the main gas port 501 and multiple auxiliary gas ports 502 in the gas transition chamber 5 to communicate with the mixing chamber 4. "Above the mixing chamber 4" refers to the position of the top of the carburetor body 1 relative to the mixing chamber 4. The integral formation of the gas transition chamber 5 with the carburetor body 1 reduces the complexity of the step-by-step manufacturing process, thereby improving the production accuracy and repeatability of the parts, reducing production costs, and improving production efficiency.

[0029] In this embodiment, the ratio of the total flow area of ​​the auxiliary gas orifice to the flow area of ​​the main gas orifice is approximately 0.25 to 0.8. The diameter of the main gas orifice 501 is larger than the diameter of a single auxiliary gas orifice 502. Under normal engine operating conditions, the gas supply provided by the larger-diameter main gas orifice 501 can meet the engine's gas requirements. When the engine is operating under medium to low load conditions, the throttle opening is smaller, and multiple auxiliary gas orifices 502 with smaller diameters than the main gas orifice 501 can provide additional gas supply, allowing more gas to enter. The mixing chamber 4 provides sufficient intake air for the engine at idle speed. The auxiliary combustion ports 502 can provide a more uniform gas flow distribution, which helps the gas to mix more thoroughly after entering the mixing chamber 4. Furthermore, the diameter of each auxiliary combustion port 502 is smaller than that of the main combustion port 501, which helps to form more micro vortices. These vortices can enhance the mixing of gas in the mixing chamber 4, thereby improving combustion efficiency. Multiple auxiliary combustion ports 502 can also disperse the gas in multiple auxiliary combustion ports 502, reducing the noise generated when the gas flows through and improving the smoothness of engine operation.

[0030] In this embodiment, the carburetor body is also provided with an idle speed passage. One end of the idle speed passage is connected to the gas transition chamber, and the other end extends to the rear of the throttle valve and is connected to the mixing chamber. When the engine is in the idle speed state, the throttle valve 6 is closed. At this time, the gas in the gas transition chamber 5 can be directly supplied to the front end of the throttle valve 6 through the idle speed passage to ensure that the engine has a stable gas supply in the idle speed state so as to maintain the engine operation without stalling.

[0031] In this embodiment, the main gas outlet 501 is vertically downward connected to the mixing chamber 4, and the outlet of the main gas outlet 501 is located at the top of the inner wall of the mixing chamber 4. The outlet of the main gas outlet 501 faces away from the throat 3 and is located at the junction of the throat 3 and the mixing chamber 4. Facing away from the throat 3 means facing the opposite direction to the air intake direction of the intake chamber 2. The outlet of the main gas outlet 501 facing away from the throat 3 can directly spray the gas into the mixing chamber 4, avoiding the gas from entering the intake chamber 2.

[0032] In this embodiment, the gas transition chamber 5 is provided with an air inlet 7, and the air inlet 7 is connected to an air inlet pipe 8 for conveying gas; such as Figure 2As shown, in this scheme, the air inlet 7 is opened laterally on the side of the gas transition chamber 5. Lateral means the air intake direction is perpendicular to the air intake chamber 2 and the throat 3 of the carburetor. The air inlet 7 is opened laterally on the side of the gas transition chamber 5. While providing a mounting position for the air intake pipe 8, the laterally opened air inlet 7 allows the air intake pipe 8 to be installed laterally, reducing the assembly space of the carburetor body 1. In addition, the air inlet 7 and the air intake pipe 8 can also adopt other installation methods, which are not limited here.

[0033] In this embodiment, the flow area inside the gas transition chamber is 1.5 to 2 times the flow area of ​​the air inlet pipe; the flow area inside the gas transition chamber is larger than the flow area of ​​the air inlet pipe, which can ensure that the gas transition chamber has a certain gas buffer capacity and ensure sufficient gas supply under different operating conditions.

[0034] In this embodiment, the outlets of the auxiliary gas ports 502 are all facing away from the throat 3 and located at the junction of the throat 3 and the mixing chamber 4. Facing away from the throat 3 means the direction opposite to the air intake direction of the intake chamber 2. The arrangement of the outlets of the main gas ports 501 facing away from the throat 3 has the same effect as the arrangement of the outlets of the main gas ports 501 facing away from the throat 3, as detailed above, and will not be repeated here.

[0035] In this embodiment, a fuel injection hole 9 is provided at the throat 3, which is used to inject fuel. Fuel enters the lower part of the carburetor body 1 through the fuel inlet pipe. When fuel is needed, the fuel is injected from the fuel injection hole 9 to the throat 3 through the fuel injection mechanism. The air drawn in through the intake chamber atomizes the fuel at the throat 3 and then enters the mixing chamber 4 to mix with the air to form a combustible mixture, which is then sent into the cylinder of the engine. The all-condition gas carburetor of this solution can automatically switch or use two fuels simultaneously under different operating conditions, which improves the adaptability and economy of the engine, and saves energy and reduces emissions.

[0036] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A gas carburetor suitable for all operating conditions, characterized in that: The carburetor includes a carburetor body, which has an intake chamber, a throat, and a mixing chamber, with the throat located between the intake chamber and the mixing chamber. It also includes a gas transition chamber, and a main gas port and at least two auxiliary gas ports are provided between the gas transition chamber and the mixing chamber. The auxiliary gas ports are used to assist the main gas port in introducing gas into the mixing chamber under different operating conditions.

2. The all-condition gas carburetor according to claim 1, characterized in that: The ratio of the total flow area of ​​the auxiliary gas orifice to the flow area of ​​the main gas orifice is approximately 0.25 to 0.

8.

3. The all-condition gas carburetor according to claim 1, characterized in that: The mixing chamber is provided with a throttle valve at the front end; the carburetor body is also provided with an idle speed passage, one end of which is connected to the gas transition chamber, and the other end extends to the rear of the throttle valve and is connected to the mixing chamber.

4. The all-condition gas carburetor according to claim 1, characterized in that: The main gas vent is connected to the top of the mixing chamber wall, and the outlet of the main gas vent faces away from the throat.

5. The all-condition gas carburetor according to claim 4, characterized in that: The outlet of the main gas vent is located at the junction of the throat and the mixing chamber.

6. The all-condition gas carburetor according to claim 1, characterized in that: The gas transition chamber is provided with an air inlet, which is connected to an air inlet pipe for conveying gas.

7. The all-condition gas carburetor according to claim 6, characterized in that: The flow area inside the gas transition chamber is 1.5 to 2 times the flow area of ​​the intake pipe.

8. The all-condition gas carburetor according to claim 3, characterized in that: The outlet of the auxiliary gas vent is connected to the inner wall of the mixing chamber, and the outlet of the auxiliary gas vent faces away from the throat.

9. The all-condition gas carburetor according to claim 8, characterized in that: The outlet of the auxiliary gas port is located at the junction of the throat and the mixing chamber, and the outlet of the auxiliary gas port is close to the opening side of the throttle valve.

10. The all-condition gas carburetor according to claim 1, characterized in that: A fuel injection hole is provided at the throat, and the fuel injection hole is used to inject fuel.

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