Single-gas passage multi-jet type gas carburetor

Abstract

The application belongs to the field of internal combustion engine and provides a single gas passage multi-injection hole type gas carburetor. The gas carburetor comprises a body and a throttle valve. The body forms a mixed gas passage for mixing air and gas. The mixed gas passage is provided with an air inlet and a mixed gas outlet at two ends along the axial direction of the mixed gas passage. The body is further provided with at least two gas injection holes on the side wall of the mixed gas passage, which are communicated with the mixed gas passage and used for supplying gas to the mixed gas passage. The gas injection holes are arranged along the axial direction of the mixed gas passage. The throttle valve is arranged in the mixed gas passage and cooperates with the side wall of the mixed gas passage to adjust the opening of the mixed gas passage. When the throttle valve is in an idle speed working condition or a closed state, at least one gas injection hole is located on the side of the throttle valve close to the mixed gas outlet, and at least one gas injection hole is located on the side of the throttle valve close to the air inlet.

Description

Technical Field

[0001] This application belongs to the field of internal combustion engines, and in particular relates to a single-pass multi-injection gas carburetor. Background Technology

[0002] Conventional gas-powered carburetors use a single fuel line inserted into the body and have only one fuel injection port. This makes it impossible to precisely adjust the air-fuel mixture concentration required for different engine operating conditions, resulting in an overly rich mixture in some conditions and an overly lean mixture in others. This leads to incomplete combustion, excessive exhaust emissions, and environmental pollution. Therefore, it is necessary to solve these technical problems. Summary of the Invention

[0003] The purpose of this application is to provide a single-pass multi-injection gas carburetor to solve the technical problem of low precision in the mixture concentration adjustment required by the engine in the prior art.

[0004] To achieve the above objectives, the technical solution adopted in this application is: to provide a single-pass multi-injection gas carburetor, comprising: The body forms a mixing passage for mixing air and fuel gas. The mixing passage has an air inlet and a mixed gas outlet at both ends along its own axial direction. The body also forms a plurality of gas nozzles on the side wall for forming the mixing passage, which communicate with the mixing passage and are used to supply fuel gas to the mixing passage. The plurality of gas nozzles are spaced apart along the axial direction of the mixing passage. The throttle valve is rotatably disposed within the air-mixing passage and cooperates with the side wall of the air-mixing passage to adjust the opening of the air-mixing passage; when the throttle valve is in idle or closed state, at least one of the gas injection holes is located on the side of the throttle valve near the air-mixing outlet, and at least one of the gas injection holes is located on the side of the throttle valve near the air inlet.

[0005] Optionally, relative to the throttle valve, the gas injection holes located on the air inlet side are a plurality of holes arranged at intervals along the axial direction of the mixing passage.

[0006] Optionally, relative to the throttle valve, the gas injection hole located on the air inlet side is an elongated oblong hole, the long axis of which is aligned with the axial direction of the mixing passage.

[0007] Optionally, a distribution cavity is also formed on the body, and the single-channel multi-jet gas carburetor further includes an air intake pipe connected to the distribution cavity and used to supply gas to the distribution cavity; The distribution cavity is connected to all of the gas injection holes.

[0008] Optionally, the single-pass multi-injection gas carburetor further includes a plug that is detachably and sealingly connected to the body, the plug forming the distribution cavity in conjunction with the body.

[0009] Optionally, a recessed cavity for accommodating the plug is formed on the body, and the dispensing cavity is connected to the recessed cavity.

[0010] The advantages of the single-pass multi-injection gas carburetor provided in this application are as follows: Compared with the prior art, in the single-pass multi-injection gas carburetor provided in this application, since several gas injection holes are arranged axially along the mixing passage, and when the throttle is in the idling or closed state, at least one gas injection hole is located on the side of the throttle near the mixture outlet, and at least one gas injection hole is located on the side of the throttle near the air inlet; thus, in the idling condition, gas is supplied through the gas injection hole located on the side of the throttle near the mixture outlet, ensuring stable idling speed; and since the air velocity is high at the flow gap formed by the outer edge of the open throttle and the side wall of the mixing passage when the throttle is in the working condition, the negative pressure generated at the gas injection hole surface near the throttle during the engine's intake stroke is greater than the negative pressure at the gas injection hole surface far from the throttle. Therefore, when the engine intakes, a negative pressure gradient is generated between the gas injection holes, and this gradient changes dynamically with the throttle opening. That is, as the throttle opening increases, the negative pressure of the gas nozzle closest to the throttle valve rises first and forms the main gas supply zone; while when the throttle valve is fully open, the negative pressure of the gas nozzles far from the throttle valve also gradually increases and achieves coordinated gas supply, reaching the maximum gas supply. In this way, the gas nozzles set in the axial position of the mixing passage can automatically respond to the changes in negative pressure distribution under different operating conditions. Therefore, the single-pass multi-nozzle gas carburetor provided in this application can achieve precise dynamic control of the mixture concentration when the engine is running at different power levels, which is far superior to the existing technology. Attached Figure Description

[0011] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0012] Figure 1 This is a schematic diagram of the overall structure of the single-pass multi-injection gas carburetor in the embodiments of this application; Figure 2 This is a partial structural diagram of a single-pass multi-injection gas carburetor in an embodiment of this application; Figure 3 This is a front view of the overall structure of the single-pass multi-injection gas carburetor in the embodiments of this application; Figure 4 For along Figure 3 Cross-sectional view of line AA in the middle; Figure 5 This is a front view of another embodiment of the single-pass multi-injection gas carburetor of this application; Figure 6 for Figure 5 BB cross-sectional view.

[0013] The reference numerals in the figures are as follows: 100, main body; 101, mixing passage; 102, air inlet; 103, mixed gas outlet; 104, gas nozzle; 105, distribution chamber; 106, sinking chamber; 200, throttle valve; 300, intake pipe; 400, plug. Detailed Implementation

[0014] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0015] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0016] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "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 application 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 application.

[0017] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0018] Please refer to the following: Figures 1 to 4 This application now describes a single-pass multi-injection gas carburetor according to an embodiment. The single-pass multi-injection gas carburetor includes a body 100 and a throttle valve 200. Wherein: The body 100 forms a mixing passage 101 for mixing air and fuel gas. The mixing passage 101 forms an air inlet 102 and a mixed gas outlet 103 at both ends along its own axial direction. The body 100 also forms a plurality of gas injection holes 104 on the side wall of the mixing passage 101, which communicate with the mixing passage 101 and are used to supply fuel gas to the mixing passage 101. The plurality of gas injection holes 104 are spaced apart along the axial direction of the mixing passage 101. The throttle valve 200 is rotatably disposed in the mixing passage 101 and cooperates with the side wall of the mixing passage 101 to adjust the opening of the mixing passage 101. When the throttle valve 200 is in the idling condition or closed state, at least one gas injection hole 104 is located on the side of the throttle valve 200 near the mixed gas outlet 103, and at least one gas injection hole 104 is located on the side of the throttle valve 200 near the air inlet 102. When the throttle valve 200 is in operation, as the opening of the throttle valve 200 increases, the intake air volume of the gas injection port 104 located on the air inlet 102 side increases from near to far according to the distance of the gas injection port 104 relative to the throttle valve 200; as the opening of the throttle valve 200 decreases, the intake air volume of the gas injection port 104 located on the air inlet 102 side decreases from far to near according to the distance of the gas injection port 104 relative to the throttle valve 200. Here, as a preferred embodiment, all gas injection ports 104 are located beside the axis of rotation of the throttle valve 200; as the most preferred embodiment, the center of all gas injection ports 104 is located on the plane of the diameter line perpendicular to the axis of rotation of the mixing passage 101 and the axis of rotation of the throttle valve 200.

[0019] According to the structure provided in this embodiment, in the single-pass multi-injection carburetor provided in this embodiment, since several gas injection holes 104 are axially spaced along the mixing passage 101, and when the throttle valve 200 is in idle or closed state, at least one gas injection hole 104 is located on the side of the throttle valve 200 near the mixture outlet 103, and at least one gas injection hole 104 is located on the side of the throttle valve 200 near the air inlet 102; thus, in idle condition, gas is supplied through the gas injection hole 104 located on the side of the throttle valve 200 near the mixture outlet 103, ensuring that the idle speed is maintained. The speed is stable; and because the air velocity is high at the flow gap formed by the outer edge of the open throttle valve 200 and the side wall of the mixing passage 101 when the throttle valve 200 is in working condition, the negative pressure generated at the gas injection port 104 near the throttle valve 200 during the engine intake stroke is greater than that at the gas injection port 104 far away from the throttle valve 200. Therefore, when the engine intakes, a negative pressure gradient will be generated between each gas injection port 104 or between different distances of the same gas injection port 104 relative to the throttle valve 200, and this gradient changes dynamically with the opening degree of the throttle valve 200. That is, as the throttle valve 200 opening increases, the gas injection orifice 104 closest to the throttle valve 200 first increases in negative pressure and forms the main gas supply zone; while when the throttle valve 200 is fully open, the negative pressure of the gas injection orifice 104 far from the throttle valve 200 also gradually increases and achieves coordinated gas supply, reaching the maximum gas supply. In this way, the gas injection orifice 104 set in the axial position of the mixing passage 101 can automatically respond to the changes in negative pressure distribution under different operating conditions. Thus, the single-pass multi-injection gas carburetor provided in this application can achieve precise dynamic control of the mixture concentration when the engine is running at different power levels, which is far superior to the existing technology.

[0020] In another embodiment of this application, please refer to [the relevant document / reference]. Figures 1 to 4 Relative to the throttle valve 200, the gas injection holes 104 located on the side of the air inlet 102 are multiple holes arranged at intervals along the axial direction of the mixing passage 101. In this embodiment, three holes are arranged at intervals.

[0021] According to the structure provided in this embodiment, when the engine is idling, the throttle valve 200 opening is small, the negative pressure of the gas injection orifice 104 between the throttle valve 200 and the air inlet 102 is small, and the gas output is small. The gas injection orifice 104 between the throttle valve 200 and the mixture outlet 103, because it is not affected by the throttling effect of the throttle valve 200, is directly subjected to the negative pressure generated by the engine intake, resulting in a large negative pressure and a large gas output, thus meeting the idling operation requirements. When the throttle valve 200 is in a working condition (i.e., the engine's low-load or high-load condition), firstly, when the engine is in a low-load condition, the throttle valve 200 opening is slightly larger than that in the idling condition. The negative pressure of the gas injection orifices 104 decreases sequentially from the throttle body 200 to the air inlet 102. Specifically, the gas injection orifices 104 closer to the throttle body 200 have a higher negative pressure and greater gas output, while those farther from the throttle body 200 have a lower negative pressure and still less gas output. This effectively meets the engine's low-load operating requirements, saves fuel, improves combustion efficiency, and reduces emissions. Conversely, under high-load conditions, the throttle body 200 opening continues to increase or reaches its maximum. The negative pressure of the gas injection orifices 104 farther from the throttle body 200 gradually increases, and the gas output also gradually increases, eventually reaching the maximum supply, providing sufficient fuel to the engine to meet its high-load operating requirements. Therefore, this single-pass multi-orifice gas carburetor can provide precise dynamic control of the air-fuel mixture concentration under more engine operating conditions, resulting in better control performance.

[0022] In another embodiment of this application, please refer to [the relevant document / reference]. Figures 5 to 6 Relative to the throttle valve 200, the gas injection hole 104 located on the side of the air inlet 102 is an elongated waist-shaped hole, and the long axis of the elongated waist-shaped hole is aligned with the axial direction of the mixing passage 101. According to the structure provided in this embodiment, when the throttle valve 200 is in operating condition (i.e., low load or high load condition of the engine), firstly, when the engine is in low load condition, the opening of the throttle valve 200 is larger than that in idle condition. Since the gas injection orifice 104 is an elongated orifice, the negative pressure generated by the engine intake on its cross-section decreases sequentially with the distance between the throttle valve 200 and the air inlet 102. That is, the closer the gas injection orifice 104 is to the throttle valve 200, the greater the negative pressure and the greater the gas output. The farther away from the throttle valve 200, the smaller the negative pressure and the smaller the gas output. This effectively meets the low load operation requirements of the engine, saves gas, improves combustion efficiency, and reduces emissions. When the engine is in high load condition, the opening of the throttle valve 200 continues to increase or increases to the maximum. The negative pressure at the location of the gas injection orifice 104 farther from the throttle valve 200 also gradually increases, and the gas output gradually increases, even reaching the maximum gas supply, to provide sufficient gas to the engine and meet the high load operation requirements of the engine.

[0023] In another embodiment of this application, please refer to [the relevant document / reference]. Figures 1 to 6 The main body 100 also forms a distribution cavity 105. The single-channel multi-orifice gas carburetor also includes an intake pipe 300 connected to the distribution cavity 105 and used to supply gas to the distribution cavity 105; the distribution cavity 105 is connected to all the gas nozzles 104. According to the above structure provided in this embodiment, after the gas enters the distribution cavity 105 from the intake pipe 300, it can form a better uniform flow effect and can provide an appropriate amount of gas to different gas nozzles 104 in a timely manner. This is beneficial to further improve the control accuracy of the single-channel multi-orifice gas carburetor in this embodiment.

[0024] In another embodiment of this application, please refer to [the relevant document / reference]. Figures 1 to 6 The single-pass multi-orifice gas carburetor also includes a detachable, sealable plug 400 connected to the body 100, which, together with the body 100, forms a distribution chamber 105. According to the structure provided in this embodiment, the detachable plug 400 connected to the body 100 not only meets the sealing requirements of the distribution chamber 105 but also facilitates maintenance and repair of the gas nozzles 104 and the mixing passage 101 by the operator, thus further improving the control accuracy of the single-pass multi-orifice gas carburetor in this embodiment.

[0025] In another embodiment of this application, please refer to [the relevant document / reference]. Figures 1 to 6 A recessed cavity 106 for accommodating the plug 400 is formed on the body 100, and a distribution cavity 105 is connected to the recessed cavity 106. According to the structure provided in this embodiment, the recessed cavity 106 formed on the body 100 can significantly improve the sealing effect between the plug 400 and the body 100, which is beneficial to further improve the control accuracy of the single-pass multi-injection carburetor in this embodiment.

[0026] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A single-pass multi-injection gas carburetor, characterized in that, include: The body (100) forms a mixing passage (101) for mixing air and fuel gas. The mixing passage (101) has an air inlet (102) and a mixed gas outlet (103) at both ends along its own axial direction. The body (100) also forms a plurality of gas nozzles (104) on the side wall for forming the mixing passage (101) to communicate with the mixing passage (101) and to provide fuel gas to the mixing passage (101). The plurality of gas nozzles (104) are spaced apart along the axial direction of the mixing passage (101). The throttle valve (200) is rotatably disposed within the mixing passage (101) and cooperates with the side wall of the mixing passage (101) to adjust the opening of the mixing passage (101); when the throttle valve (200) is in idle or closed state, at least one of the gas injection holes (104) is located on the side of the throttle valve (200) near the mixing outlet (103), and at least one of the gas injection holes (104) is located on the side of the throttle valve (200) near the air inlet (102).

2. The single-pass multi-injection gas carburetor as described in claim 1, characterized in that: Relative to the throttle valve (200), the gas injection holes (104) located on the side of the air inlet (102) are a plurality of holes arranged at intervals along the axial direction of the mixing passage (101).

3. The single-pass multi-injection gas carburetor as described in claim 1, characterized in that: Relative to the throttle valve (200), the gas injection hole (104) located on the side of the air inlet (102) is an elongated hole, and the long axis of the elongated hole is aligned with the axial direction of the mixing passage (101).

4. The single-pass multi-injection gas carburetor as described in claim 1, characterized in that: The body (100) also forms a distribution cavity (105), and the single-channel multi-jet gas carburetor also includes an air inlet pipe (300) connected to the distribution cavity (105) and used to supply gas to the distribution cavity (105). The distribution cavity (105) is connected to all of the gas injection holes (104).

5. The single-pass multi-injection gas carburetor as described in claim 4, characterized in that: The single-channel multi-injection gas carburetor also includes a plug (400) that is detachably and sealed to the body (100), and the plug (400) cooperates with the body (100) to form the distribution cavity (105).

6. The single-pass multi-injection gas carburetor as described in claim 5, characterized in that: A recessed cavity (106) for accommodating the plug (400) is formed on the body (100), and the distribution cavity (105) is connected to the recessed cavity (106).

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