Single-gas-channel multi-spray-hole type gas carburetor
By designing a multi-jet hole structure and throttle combination in the gas carburetor, it automatically responds to changes in negative pressure distribution, solving the problem of inaccurate adjustment of the mixture concentration, and achieving efficient combustion and low emissions of the engine under different working conditions.
Patent Information
- Application Number
- CN202510763835.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-06-09
- Publication Date
- 2025-08-08
AI Technical Summary
Existing gas-type carburetors cannot accurately adjust the required mixture concentration in each operating condition of the engine, resulting in excessively concentrated gas in some operating conditions and excessively thinning of the mixture in some operating conditions, resulting in insufficient combustion, excessive exhaust emissions and environmental pollution.
A single-airway multi-jet-hole gas carburetor is designed, with several gas injection holes arranged in the axial interval on the mixed airway. The throttle valve adjusts the opening in the mixed airway. The gas injection hole positions are different under idle working conditions or closed conditions. It automatically responds to the changes in the negative pressure distribution to achieve accurate dynamic control of the mixture concentration.
It realizes accurate dynamic control of the mixture concentration under different engine conditions, improves combustion efficiency, reduces exhaust emissions, and meets the operating needs of different loads.
Smart Images
Figure CN120444151A_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the field of internal combustion engines, and in particular to a single-passage multi-spray hole gas carburetor. Background Art
[0002] Conventional gas carburetors use a single gas pipe inserted into the main body, with only one gas nozzle. This makes it impossible to precisely adjust the mixture concentration required for each engine operating condition. This results in the mixture being too rich in some conditions and too lean in others, leading to incomplete combustion, excessive exhaust emissions, and environmental pollution. Therefore, it is necessary to solve the above technical problems. Summary of the Invention
[0003] The purpose of the embodiments of the present application is to provide a single-passage multi-nozzle gas carburetor to solve the technical problem of low precision in regulating the concentration of mixed gas 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-air-channel multi-spray-hole gas carburetor, comprising: A main body, forming a mixed gas passage for mixing air and gas, wherein the mixed gas passage forms an air inlet and a mixed gas outlet at both ends along its axial direction. The main body also forms a plurality of gas injection holes on a side wall thereof, which are connected to the mixed gas passage and used to supply gas to the mixed gas passage. The plurality of gas injection holes are arranged at intervals along the axial direction of the mixed gas passage; A throttle valve is rotatably disposed in the mixture passage and cooperates with the side wall of the mixture passage to adjust the opening of the mixture passage; when the throttle valve is in an idle condition or a closed state, at least one of the gas injection holes is located on the side of the throttle valve close to the mixture outlet, and at least one of the gas injection holes is located on the side of the throttle valve close to the air inlet.
[0005] Optionally, relative to the throttle valve, the gas injection holes located on one side of the air inlet are a plurality of holes arranged at intervals along the axial direction of the mixture passage.
[0006] Optionally, relative to the throttle valve, the gas injection hole located on the air inlet side is a long waist-shaped hole, and the long axis direction of the long waist-shaped hole is consistent with the axial direction of the mixture passage.
[0007] Optionally, a distribution cavity is further formed on the main body, and the single-air-channel multi-spray-hole gas carburetor further includes an air inlet pipe connected to the distribution cavity and used for providing gas to the distribution cavity; The distribution cavity is communicated with all the gas spray holes.
[0008] Optionally, the single-pass multi-spray-hole gas carburetor further includes a plugging piece detachably and sealingly connected to the body, and the plugging piece cooperates with the body to form the distribution cavity.
[0009] Optionally, a sinking cavity for accommodating the blocking piece is formed on the main body, and the distribution cavity is connected to the sinking cavity.
[0010] The single-pass multi-nozzle gas carburetor provided in this application has the following advantages: compared with the prior art, the single-pass multi-nozzle gas carburetor provided in this application has the following advantages: because the multiple gas nozzles are spaced axially along the mixture passage, and when the throttle is in the idle or closed state, at least one gas nozzle is located on the side of the throttle valve near the mixture outlet, and at least one gas nozzle is located on the side of the throttle valve near the air inlet. Thus, under idle conditions, gas is supplied through the gas nozzles located on the side of the throttle valve near the mixture outlet, ensuring stable idle speed. Furthermore, when the throttle is in the operating state, the air flow rate is high at the flow gap formed by the outer edge of the open throttle valve and the side wall of the mixture passage. Therefore, the negative pressure generated at the gas nozzle orifice near the throttle during the engine's intake stroke is greater than the negative pressure at the gas nozzle orifice far from the throttle. Therefore, when the engine inhales, a negative pressure gradient is generated between the gas nozzles, and this gradient changes dynamically with the throttle opening. That is, in the process of increasing the throttle opening, the negative pressure of the gas nozzle closest to the throttle increases first and forms the main air supply area; and when the throttle is fully opened, the negative pressure of the gas nozzle far away from the throttle gradually increases and realizes coordinated air supply to reach the maximum air supply volume. In this way, the gas nozzle arranged in the axial position of the mixture duct can automatically respond to the changes in the negative pressure distribution under different working conditions. Therefore, the single-passage multi-nozzle gas carburetor provided in this application can realize precise dynamic control of the mixture concentration when the engine is running at different power, which is far superior to the existing technology. BRIEF DESCRIPTION OF THE DRAWINGS
[0011] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments or descriptions of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.
[0012] Figure 1 This is a schematic diagram of the overall structure of a single-passage multi-spray hole gas carburetor in an embodiment of the present application; Figure 2 This is a partial structural diagram of a single-passage multi-spray hole gas carburetor in an embodiment of the present application; Figure 3 This is a front view of the overall structure of a single-passage multi-spray hole gas carburetor in an embodiment of the present application; Figure 4 For the Figure 3 Cross-sectional structural diagram along line AA; Figure 5 This is a front view of another embodiment of the single-passage multi-spray hole gas carburetor of the present application; Figure 6 for Figure 5 Middle BB cross-section view.
[0013] Among them, the reference numerals in the figure are: 100, main body; 101, mixture channel; 102, air inlet; 103, mixture outlet; 104, gas nozzle; 105, distribution cavity; 106, sinking cavity; 200, throttle; 300, intake pipe; 400, blocking piece. DETAILED DESCRIPTION
[0014] In order to make the technical problems, technical solutions and beneficial effects to be solved by this application more clearly understood, this application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.
[0015] It should be noted that when an element is referred to as being “fixed on” or “disposed on” another element, it may be directly on the other element or indirectly on the other element. When an element is referred to as being “connected to” another element, it may be directly connected to the other element or indirectly connected to the other element.
[0016] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and 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, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation 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 the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. Throughout the description of this application, "plurality" means two or more, unless otherwise specifically defined.
[0018] Please also refer to Figures 1 to 4 The single-pass multi-spray hole gas carburetor provided in the embodiment of the present application is now described. The single-pass multi-spray hole gas carburetor includes a body 100 and a throttle valve 200. The main body 100 forms a mixture passage 101 for mixing air and gas. The mixture passage 101 forms an air inlet 102 and a mixture outlet 103 at both ends along its own axial direction. The main body 100 also forms a plurality of gas nozzles 104 on the side wall used to form the mixture passage 101, which are connected to the mixture passage 101 and used to provide gas to the mixture passage 101. The plurality of gas nozzles 104 are arranged at intervals along the axial direction of the mixture passage 101; the throttle valve 200 is rotatably arranged in the mixture passage 101 and cooperates with the side wall of the mixture passage 101 to adjust the opening of the mixture passage 101; when the throttle valve 200 is in an idle state or a closed state, at least one gas nozzle 104 is located on the side of the throttle valve 200 near the mixture outlet 103, and at least one gas nozzle 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 throttle valve 200 opening increases, the amount of air intake through the gas injection holes 104 located on one side of the air inlet 102 increases, based on the distance of the gas injection holes 104 from the throttle valve 200 from near to far. As the throttle valve 200 opening decreases, the amount of air intake through the gas injection holes 104 located on one side of the air inlet 102 decreases, based on the distance of the gas injection holes 104 from the throttle valve 200 from far to near. Here, as a preferred embodiment, all of the gas injection holes 104 are located beside the axis of the throttle valve 200 rotation shaft. As a most preferred embodiment, the centers of all of the gas injection holes 104 are located on a plane containing a diameter line perpendicular to the axis of the mixture passage 101 and the throttle valve 200 rotation shaft.
[0019] According to the above structure provided in this embodiment, in the single-passage multi-spray hole type gas carburetor provided in this embodiment, since a plurality of gas spray holes 104 are arranged axially at intervals along the mixture passage 101, and when the throttle valve 200 is in the idle state or closed state, at least one gas spray hole 104 is located on the side of the throttle valve 200 close to the mixture outlet 103, and at least one gas spray hole 104 is located on the side of the throttle valve 200 close to the air inlet 102; thus, in the idle state, gas is supplied through the gas spray holes 104 located on the side of the throttle valve 200 close to the mixture outlet 103, ensuring that the idle state is stable. speed is stable; and because the air flow rate is high at the flow gap formed by the outer edge of the opened throttle valve 200 and the side wall of the mixture passage 101 when the throttle valve 200 is in the working condition, the negative pressure generated at the mouth surface of the gas injection hole 104 near the throttle valve 200 during the engine's intake stroke is greater than the negative pressure at the mouth surface of the gas injection hole 104 far from the throttle valve 200. Therefore, when the engine inhales, a negative pressure gradient is generated between the gas injection holes 104 or between the same gas injection hole 104 at different distances from the throttle valve 200, and this gradient changes dynamically with the opening of the throttle valve 200. That is, as the throttle valve 200 opening increases, the negative pressure of the gas nozzle 104 closest to the throttle valve 200 increases first and forms the main air supply area; and when the throttle valve 200 is fully opened, the negative pressure of the gas nozzle 104 far away from the throttle valve 200 also gradually increases and realizes coordinated air supply to reach the maximum air supply volume. In this way, the gas nozzle 104 arranged in the axial position of the mixture passage 101 can automatically respond to the changes in the negative pressure distribution under different working conditions. Therefore, the single-passage multi-nozzle gas carburetor provided in this application can realize precise dynamic control of the mixture concentration when the engine is running at different power, which is far superior to the existing technology.
[0020] In another embodiment of this application, please refer to Figures 1 to 4 Relative to the throttle valve 200 , the gas injection holes 104 located on one side of the air inlet 102 are a plurality of holes arranged at intervals along the axial direction of the mixture passage 101 . In this embodiment, three holes are arranged at intervals.
[0021] According to the above structure provided in this embodiment, when the engine is in the idle condition, the throttle valve 200 is opened slightly, the negative pressure of the gas injection hole 104 between the throttle valve 200 and the air inlet 102 is small, and the gas output is small. The gas injection hole 104 between the throttle valve 200 and the mixture outlet 103 is directly affected by the negative pressure generated by the engine intake because it is not throttled by the throttle valve 200. Its negative pressure is large and the gas output is large, which meets the idle operation requirements. When the throttle valve 200 is in the working condition (i.e., the low load condition or high load condition of the engine), first, when the engine is in the low load condition, the throttle valve 200 opening is increased compared to the idle condition. The negative pressure of the gas injection holes 104 between the throttle valve 200 and the air inlet 102 decreases gradually, that is, the gas injection holes 104 near the throttle valve 200 have a high negative pressure and a large gas output, while the gas injection holes 104 far from the throttle valve 200 have a low negative pressure and a still small gas output, effectively meeting the low-load operation requirements of the engine, saving gas, improving combustion efficiency, and reducing emissions; when the engine is in a high-load condition, the throttle valve 200 opening continues to increase or reaches a maximum, the negative pressure of the gas injection holes 104 far from the throttle valve 200 gradually increases, and the gas output also gradually increases, even reaching the maximum gas supply, providing sufficient gas to the engine to meet the high-load operation requirements of the engine. Therefore, the single-passage multi-nozzle gas carburetor in this embodiment can provide precise dynamic control of the mixture concentration under more engine operating conditions, with better control effect.
[0022] In another embodiment of this application, please refer to Figures 5 and 6 Relative to the throttle valve 200 , the gas injection hole 104 located on one side of the air inlet 102 is a long waist-shaped hole, and the long axis direction of the long waist-shaped hole is consistent with the axial direction of the mixture passage 101 . According to the structure provided in this embodiment, when the throttle valve 200 is in an operating condition (i.e., a low-load or high-load condition of the engine), first, under low-load conditions, the throttle valve 200 opening increases relative to the idle condition. Since the gas injection hole 104 is a long, waist-shaped hole, the negative pressure generated by the engine intake on its cross-section decreases as the distance from the throttle valve 200 to the air inlet 102 increases. That is, the closer the gas injection hole 104 is to the throttle valve 200, the greater the negative pressure and the greater the gas output. The farther the gas injection hole 104 is from the throttle valve 200, the lower the negative pressure and the smaller the gas output. This effectively meets the low-load operation requirements of the engine, saves fuel, improves combustion efficiency, and reduces emissions. When the engine is under high-load conditions, the throttle valve 200 opening continues to increase or reaches its maximum value. The negative pressure and gas output at the gas injection hole 104 farther from the throttle valve 200 also gradually increase, and the gas output also gradually increases, until it reaches the maximum gas supply, providing sufficient fuel to the engine to meet the high-load operation requirements of the engine.
[0023] In another embodiment of this application, please refer to Figures 1 to 6 The main body 100 also forms a distribution cavity 105. The single-passage, multi-nozzle 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 of the gas nozzles 104. According to the structure provided in this embodiment, after the gas enters the distribution cavity 105 from the intake pipe 300, it can achieve a more uniform flow effect and promptly provide the appropriate amount of gas to each gas nozzle 104. This further improves the control accuracy of the single-passage, multi-nozzle gas carburetor in this embodiment.
[0024] In another embodiment of this application, please refer to Figures 1 to 6 The single-pass multi-nozzle gas carburetor further includes a plugging piece 400 detachably and sealingly connected to the main body 100. The plugging piece 400 cooperates with the main body 100 to form a distribution chamber 105. According to the structure provided in this embodiment, the plugging piece 400 detachably connected to the main body 100 not only satisfies the sealing requirements of the distribution chamber 105, but also facilitates maintenance and repair of the gas injection holes 104 and the mixture passage 101 by the operator, thereby further improving the control accuracy of the single-pass multi-nozzle gas carburetor in this embodiment.
[0025] In another embodiment of this application, please refer to Figures 1 to 6 A sunken cavity 106 for accommodating the plugging piece 400 is formed on the body 100, and the distribution cavity 105 is connected to the sunken cavity 106. According to the structure provided in this embodiment, the sunken cavity 106 formed on the body 100 can significantly improve the sealing effect between the plugging piece 400 and the body 100, which helps further improve the control accuracy of the single-passage multi-nozzle gas carburetor in this embodiment.
[0026] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present application should be included in the scope of protection of the present application.
Claims
1. A single-passage multi-spray hole gas carburetor, characterized in that: include: A main body (100) is formed with a mixed gas passage (101) for mixing air and gas, wherein the mixed gas passage (101) is formed with an air inlet (102) and a mixed gas outlet (103) at both ends along its axial direction, and the main body (100) is further formed with a plurality of gas spray holes (104) on a side wall for forming the mixed gas passage (101), which are connected to the mixed gas passage (101) and used to provide gas to the mixed gas passage (101), wherein the plurality of gas spray holes (104) are arranged at intervals along the axial direction of the mixed gas passage (101); A throttle valve (200) is rotatably disposed in the mixture passage (101) and cooperates with the side wall of the mixture passage (101) to adjust the opening of the mixture passage (101); when the throttle valve (200) is in an idle state or a closed state, at least one of the gas injection holes (104) is located on a side of the throttle valve (200) close to the mixture outlet (103), and at least one of the gas injection holes (104) is located on a side of the throttle valve (200) close to the air inlet (102).
2. The single-passage multi-spray hole gas carburetor according to claim 1, characterized in that: Relative to the throttle valve (200), the gas injection holes (104) located on one side of the air inlet (102) are a plurality of holes arranged at intervals along the axial direction of the mixed gas passage (101).
3. The single-passage multi-nozzle gas carburetor according to claim 1, characterized in that: Relative to the throttle valve (200), the gas injection hole (104) located on one side of the air inlet (102) is a long waist-shaped hole, and the long axis direction of the long waist-shaped hole is consistent with the axial direction of the mixed gas channel (101).
4. The single-passage multi-spray hole gas carburetor according to claim 1, characterized in that: A distribution cavity (105) is also formed on the body (100), and the single-passage multi-spray hole gas carburetor further includes an air intake pipe (300) connected to the distribution cavity (105) and used to provide gas to the distribution cavity (105); The distribution cavity (105) is in communication with all the gas spray holes (104).
5. The single-passage multi-nozzle gas carburetor according to claim 4, characterized in that: The single-air-channel multi-spray-hole gas carburetor further comprises a plugging piece (400) detachably and sealingly connected to the body (100); the plugging piece (400) cooperates with the body (100) to form the distribution cavity (105).
6. The single-passage multi-nozzle gas carburetor according to claim 5, characterized in that: A sinking cavity (106) for accommodating the blocking piece (400) is formed on the main body (100), and the distribution cavity (105) is connected to the sinking cavity (106).