A multi-fuel integrated switching valve and its switching method

Abstract

This invention provides a multi-fuel integrated switching valve and its switching method, relating to the technical field of multi-fuel integrated switching valves. It includes a gas section and a fuel section. A gas valve core with a gas passage is rotatably mounted within a gas valve housing, which has a gas inlet and a gas outlet. A fuel valve core with an oil passage is rotatably mounted within a fuel valve housing. The axes of the gas inlet and the gas outlet are at the same height, and the fuel valve core is statically connected to the gas valve core. Compared with existing technologies, this invention has the following technical advantages: by integrating a liquid fuel valve and a gas fuel valve on the same switching valve and improving the structure of the gas valve core, it can quickly switch between liquid and gas fuels, as well as switch the flow rate between liquefied petroleum gas (LPG) and natural gas. It features an ingenious design, simple operation, safety and reliability, a compact structure, small footprint, and good versatility, effectively improving the power and economy of internal combustion engines.

Description

Technical Field

[0001] This invention relates to the field of multi-fuel integrated switching valve technology, and particularly to a multi-fuel integrated switching valve and its switching method. Background Technology

[0002] Existing internal combustion engines typically use multiple fuels, generally including liquid fuels and gaseous fuels. Liquid fuels are typically gasoline or ethanol gasoline, while gaseous fuels are typically liquefied petroleum gas (LPG) and natural gas. Liquid fuels are usually housed in a separate liquid fuel passage, while the two gaseous fuels share another gaseous fuel passage. When using liquid fuels, the gaseous fuel passage needs to be closed; conversely, when using gaseous fuels (only LPG or natural gas), the liquid fuel passage needs to be closed. In current technology, closing the liquid fuel passage is generally achieved through an electronic switching system within the carburetor.

[0003] Switching between liquid and gaseous fuels is generally achieved through a fuel switching device, which switches between liquid and gaseous fuels by opening or closing the liquid fuel channel or gas fuel channel. When using gaseous fuels, the required flow rates of liquefied petroleum gas (LPG) and natural gas differ due to their different air-fuel ratios, necessitating a switching mechanism as well.

[0004] Current technical solutions typically require two switching mechanisms (or two operations) to switch between liquid and gaseous fuels, as well as between the flow rates of liquefied petroleum gas and natural gas. This is not only cumbersome, time-consuming, and labor-intensive, but also involves numerous and complex switching devices that occupy a large amount of space, resulting in a large number of complicated pipeline rerouting issues. Summary of the Invention

[0005] This invention provides a multi-fuel integrated switching valve that can switch between liquid fuels and gaseous fuels, as well as between liquefied petroleum gas and natural gas, on the same valve. The switching method is also improved to solve the above-mentioned technical problems.

[0006] The specific technical solution is a multi-fuel integrated switching valve, comprising: a gas section and a fuel section. In the gas section, a gas valve core with a gas passage is rotatably installed inside a gas valve housing. The gas valve housing has a gas inlet and a gas outlet, and the axis of the gas inlet and the axis of the gas outlet are at the same height. In the fuel section, a fuel valve core with an oil passage is rotatably installed inside a fuel valve housing. The fuel valve core is statically connected to the gas valve core. The fuel valve housing has a fuel inlet and a fuel outlet.

[0007] Preferably, the gas valve core has a first gas passage and a second gas passage, both of which are straight-through channels with different cross-sectional sizes. The gas inlet and the gas outlet are connected through the first gas passage or the second gas passage to form a first gas passage and a second gas passage, respectively.

[0008] Preferably, at least one of the axes of the first air passage and the second air passage is offset from the axis of the gas valve core.

[0009] Preferably, both the first air passage and the second air passage are offset from the axis of the gas valve core.

[0010] Preferably, the axis of the first airway is at the same height as the axis of the second airway, and the axis of the first airway is perpendicular to the axis of the second airway.

[0011] Preferably, the fuel inlet is positioned higher than the fuel outlet, the fuel valve core has an inlet on its upper side and an outlet at its bottom, and a fluid channel is provided between the bottom of the fuel valve core and the fuel valve housing, forming a fuel channel from the fuel inlet through the fluid channel to the fuel outlet.

[0012] Preferably, the gas valve core has an upper linkage part for connecting to an external rotation drive above it and a lower linkage part below it. The fuel valve core has a valve core linkage part above it. The fuel valve core is statically connected to the gas valve core through the cooperation of the valve core linkage part and the lower linkage part.

[0013] Preferably, the external rotation drive is provided with a fuel gear, a first gas fuel gear, a second gas fuel gear, and a stop gear.

[0014] A switching method is described for the multi-fuel integrated switching valve of the present invention, wherein when the gas inlet and the gas outlet are connected through a gas passage, the fuel inlet and the fuel outlet are not connected; when the fuel inlet and the fuel outlet are connected through an oil passage, the gas inlet and the gas outlet are not connected.

[0015] Preferably, when the first gas passage is connected, the second gas passage and the fuel passage are both blocked; when the second gas passage is connected, the first gas passage and the fuel passage are both blocked; when the fuel passage is connected, the first gas passage and the second gas passage are both blocked; there is a state where the first gas passage, the second gas passage, and the fuel passage are all blocked.

[0016] Compared with the prior art, the present invention has the following technical advantages:

[0017] 1. The same switching valve integrates both liquid and gaseous fuel valves, allowing for quick and easy switching between liquid and gaseous fuels with a single operation.

[0018] 2. Through structural improvements to the gas valve core, the appropriate flow rate for the corresponding gaseous fuel can be directly selected during switching, ensuring the internal combustion engine maintains optimal operating conditions when using different gaseous fuels. Operation is simple.

[0019] 3. The switching valve in this invention can quickly switch between liquefied petroleum gas and natural gas flow rates while simultaneously ensuring the closure of the fuel passage, ensuring safety and reliability.

[0020] 4. The switching valve in this invention integrates a liquid fuel valve and a gas fuel valve, and improves the structure of the gas valve core. The overall structure is compact, occupies little space, and does not change the original flow direction of the fluid. Installation requires minimal and uncomplicated piping modifications, and it has good versatility.

[0021] In summary, by integrating liquid fuel valves and gaseous fuel valves on the same switching valve and improving the structure of the gas valve core, it is possible to quickly switch between liquid fuels and gaseous fuels, as well as switch between liquefied petroleum gas and natural gas flow rates. The design is ingenious, easy to operate, safe and reliable, compact in structure, occupies little space, and has good versatility, which can effectively improve the power and economy of internal combustion engines. Attached Figure Description

[0022] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0023] Figure 1 This is a front view of the multi-fuel integrated switching valve of the present invention.

[0024] Figure 2 This is an exploded view of the multi-fuel integrated switching valve of the present invention.

[0025] Figure 3 for Figure 1 Sectional view AA

[0026] Figure 4 for Figure 1 BB section view,

[0027] Figure 5 This is a schematic diagram showing the positions of the contacts and terminals corresponding to the gear positions, where:

[0028] 1. Fuel gear position information terminal; 2. Fuel cut-off / ignition-stop gear position information terminal; 3. Stop gear position information terminal; 4. First gas fuel position information terminal; 5. Second gas fuel position information terminal; 6. Fuel gear position contact; 7. Fuel cut-off / ignition-stop gear contact; 8. Stop gear contact; 9. First gas fuel position contact; 10. Second gas fuel position contact; 11. Control panel; 12. Gas valve core; 13. Gas inlet; 14. Gas outlet; 15. Fuel inlet; 16. Fuel outlet; 17. Fuel valve core; 18. Valve core linkage; 19. First gas passage; 20. Second gas passage; 22. Contact switch; 23. Gas valve core pressure plate; 24. Gas valve housing; 25. Fuel valve housing; 26. Gasket.

[0029] Figure 2 The middle line L indicates the axis of the gas valve core and fuel valve core after assembly. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the embodiments and accompanying drawings. Here, the illustrative embodiments and descriptions of this invention are used to explain the invention, but are not intended to limit the invention.

[0031] In the description of this invention, it should be noted that the terms "inner", "outer", "left", and "right" indicate the orientation or positional relationship based on the positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention 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 invention.

[0032] Combination Figure 1-5 It should be noted that after assembly, during the switching operation, the gas valve core and the fuel valve core rotate around L as the rotation axis for switching.

[0033] A multi-fuel integrated switching valve includes a gas section and a fuel section. In the gas section, a gas valve core 12 with a gas passage is rotatably installed inside a gas valve housing 24. The gas valve housing 24 is provided with a gas inlet 13 and a gas outlet 14, and the axis of the gas inlet 13 and the axis of the gas outlet 14 are at the same height. In the fuel section, a fuel valve core 17 with an oil passage is rotatably installed inside a fuel valve housing 25. The fuel valve core 17 is statically connected to the gas valve core 12. The fuel valve housing 25 is provided with a fuel inlet 15 and a fuel outlet 16.

[0034] In use, when the gas inlet 13 and the gas outlet 14 are connected through a gas passage, the fuel inlet 15 and the fuel outlet 16 are not connected; when the fuel inlet 15 and the fuel outlet 16 are connected through an oil passage, the gas inlet 13 and the gas outlet 14 are not connected. The liquid fuel valve and the gas fuel valve are integrated on the same switching valve, resulting in a compact structure, small footprint, and quick switching between liquid and gas fuels with a single operation, making operation simple.

[0035] In one embodiment, the gas valve core 12 has a first gas passage 19 and a second gas passage 20. The first gas passage 19 and the second gas passage 20 are both straight-through channels with different cross-sectional sizes. The gas inlet 13 and the gas outlet 14 are connected through the first gas passage 19 or the second gas passage 20 to form a first gas passage and a second gas passage, respectively.

[0036] During use, when the first gas passage is open, the second gas passage and the fuel passage are closed; when the second gas passage is open, the first gas passage and the fuel passage are closed; when the fuel passage is open, the first and second gas passages are closed; there is a state where the first, second, and fuel passages are all closed. Through structural improvements to the gas valve core, the appropriate flow rate for the corresponding gaseous fuel can be directly selected during switching, ensuring the internal combustion engine maintains optimal operating conditions when using different gaseous fuels. Operation is simple; the overall structure is compact, occupying little space, and does not change the original fluid flow direction. Installation requires minimal and uncomplicated piping modifications, offering good versatility. Furthermore, this switching valve can quickly switch between liquefied petroleum gas and natural gas flow rates while simultaneously ensuring the fuel passage remains closed, ensuring safety and reliability.

[0037] In one embodiment, at least one of the axes of the first gas passage 19 and the second gas passage 20 deviates from the axis of the gas valve core 12. This design aims to reserve a larger, continuous closed area on the gas valve core 12 to block the gas inlet 13 and cut off the gaseous fuel supply.

[0038] In one embodiment, both the first air passage 19 and the second air passage 20 are offset from the axis of the gas valve core 12. The purpose of this design is to reserve a larger continuous closing area on the gas valve core 12, which makes assembly more convenient while blocking the gas inlet 13 and cutting off the gas fuel; more settings can be set, including a channel setting and a stop setting, as well as a fuel cut-off without shutting off setting.

[0039] In one embodiment, the axis of the first air passage 19 is at the same height as the axis of the second air passage 20, and the axis of the first air passage 19 is perpendicular to the axis of the second air passage 20. This is a specific structural form of the gas valve core 12.

[0040] In one embodiment, the fuel inlet 15 is positioned higher than the fuel outlet 16. The fuel valve core 17 has an inlet on its upper side and an outlet at its bottom. A fluid channel is provided between the bottom of the fuel valve core 17 and the fuel valve housing 25, forming a fuel passage from the fuel inlet 15 through the fluid channel to the fuel outlet 16. This is a specific structural form of the fuel unit.

[0041] In one embodiment, the gas valve core 12 has an upper linkage portion for connecting to an external rotation drive above it and a lower linkage portion below it. The fuel valve core 17 has a valve core linkage portion 18 above it. The fuel valve core 17 is statically connected to the gas valve core 12 through the cooperation of the valve core linkage portion 18 and the lower linkage portion. This is a description of the connection between the gas valve core 12, the fuel valve core 17, and the external rotation drive, which forms the structural basis for the switching valve rotation control.

[0042] In one embodiment, the external rotary drive is provided with a fuel position, a first gas fuel position, a second gas fuel position, and a stop position. In addition, a fuel cut-off-button-on-fire position can also be provided. These positions are also provided with corresponding contacts and terminals, all of which are disposed on a control panel 11. The control panel 11 is fixedly mounted on the gas valve housing 24 and is a fixed part of the external rotary drive. The rotating part of the external rotary drive drives the gas valve core 12 and the fuel valve core 17 to rotate synchronously relative to the gas valve housing 24 and the fuel valve housing 25.

[0043] Example 1: Refer to Figure 1 , 24. A multi-fuel integrated switching valve, comprising: a gas section and a fuel section, wherein the gas section is located above the fuel section; in the gas section, a gas valve core 12 with a gas passage is rotatably mounted inside a gas valve housing 24, the gas valve housing 24 having a gas inlet 13 and a gas outlet 14; in the fuel section, a fuel valve core 17 with an oil passage is rotatably mounted inside a fuel valve housing 25, the fuel valve housing 25 having a fuel inlet 15 and a fuel outlet 16, the axis of the gas inlet 13 and the axis of the gas outlet 14 being at the same height, the fuel valve housing 25 being fixedly mounted on the gas valve housing 24, and sealing treatment is required during the assembly of the valve core and the valve housing, for example, the gas... A gasket 26 is provided between the valve core 12 and the gas valve housing 24. The gas valve core 12 has an upper linkage part for connecting to an external rotary drive above it and a lower linkage part below it. The fuel valve core 17 has a valve core linkage part 18 above it, and the fuel valve core 17 is statically connected to the gas valve core 12 through the cooperation of the valve core linkage part 18 and the lower linkage part. The fuel inlet 15 is positioned higher than the fuel outlet 16. The fuel valve core 17 has an inlet on its upper side and an outlet at its bottom. A fluid channel is provided between the bottom of the fuel valve core 17 and the fuel valve housing 25, forming a fuel passage from the fuel inlet 15 through the fluid channel to the fuel outlet 16. The external rotary drive is equipped with a fuel position, a gas position, and a stop position.

[0044] Example 2: Based on the structure of Example 1, the gas valve core 12 has a first gas passage 19 and a second gas passage 20. Both the first gas passage 19 and the second gas passage 20 are straight-through channels with different cross-sectional sizes. The gas inlet 13 and the gas outlet 14 are connected through the first gas passage 19 or the second gas passage 20 to form a first gas passage and a second gas passage, respectively. At least one of the axes of the first gas passage 19 and the second gas passage 20 deviates from the axis of the gas valve core 12. The external rotation drive is equipped with a fuel position F, a first gas fuel position C, a second gas fuel position N, and a shutdown position O. The fuel gear F, first gas fuel gear C, second gas fuel gear N, and engine stop / off gear O correspond sequentially to their respective terminals—fuel gear information terminal 1, first gas fuel gear information terminal 4, second gas fuel gear information terminal 5, and stop gear information terminal 3—and also sequentially to their respective contacts—fuel gear contact 6, first gas fuel gear contact 9, second gas fuel gear contact 10, and stop gear contact 8. These contacts and terminals are all located on the control panel 11, as shown in the reference diagram. Figure 5Understood. The control panel 11 is fixedly mounted on the gas valve housing 24 via the gas valve core pressure plate 23. The control panel 11 is the fixed part of the external rotation drive. The rotating part of the external rotation drive drives the gas valve core 12 and the fuel valve core 17 to rotate synchronously relative to the gas valve housing 24 and the fuel valve housing 25 to achieve the switching of different gears.

[0045] Example 3: Unlike Example 2, both the first air passage 19 and the second air passage 20 are offset from the axis of the gas valve core 12. The external rotation drive also includes a fuel cut-off / fire-off position S, which corresponds to the fuel cut-off / fire-off position contact 7 and the fuel cut-off / fire-off position information terminal 2. The axis of the first air passage 19 is at the same height as the axis of the second air passage 20, and the axis of the first air passage 19 is perpendicular to the axis of the second air passage 20.

[0046] Example 4: Based on the structure of Example 1, referring to... Figure 3 The gas inlet 13 and the gas outlet 14 are coaxial and their axes are offset from the axis of the gas valve housing 24. The gas valve core 12 is recessed from the side to form the first gas passage 19. The cross-sectional area of ​​the first gas passage 19 is larger than the cross-sectional area of ​​the second gas passage 20. The second gas passage 20 is offset from the axis of the gas valve core 12. With the second gas passage 20 as a reference, the gas valve core 12 is divided into two unequal parts. The other areas of these two parts, except for the first gas passage 19, are continuous closed areas. These continuous closed areas are used to block the gas inlet 13 and cut off the gas fuel.

[0047] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention in any other way. Any person skilled in the art may make changes or modifications to the disclosed technical content to create equivalent embodiments. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the protection scope of the present invention.

Claims

1. A multi-fuel integrated switching valve, comprising: Gas section and fuel oil section; characterized in that, In the gas section, a gas valve core (12) with a gas passage is rotatably installed inside a gas valve housing (24). The gas valve housing (24) is provided with a gas inlet (13) and a gas outlet (14). The axis of the gas inlet (13) and the axis of the gas outlet (14) are at the same height. In the fuel section, a fuel valve core (17) with an oil passage is rotatably installed in the fuel valve housing (25). The fuel valve core (17) is statically connected to the gas valve core (12). The fuel valve housing (25) is provided with a fuel inlet (15) and a fuel outlet (16). The gas valve core (12) has a first gas passage (19) and a second gas passage (20). The first gas passage (19) and the second gas passage (20) are both straight-through channels. The cross-sectional sizes of the first gas passage (19) and the second gas passage (20) are different. The gas inlet (13) and the gas outlet (14) are connected through the first gas passage (19) or the second gas passage (20) to form the first gas passage and the second gas passage, respectively. The axis of the first airway (19) is at the same height as the axis of the second airway (20), and the axis of the first airway (19) is perpendicular to the axis of the second airway (20). The position of the fuel inlet (15) is higher than the height of the fuel outlet (16). The fuel valve core (17) has an oil inlet on the upper side and an oil outlet at the bottom. A fluid channel is left between the bottom of the fuel valve core (17) and the fuel valve housing (25). A fuel channel is formed from the fuel inlet (15) through the fluid channel to the fuel outlet (16). The gas valve core (12) has an upper linkage part for connecting to an external rotation drive above it and a lower linkage part below it. The fuel valve core (17) has a valve core linkage part (18) above it. The fuel valve core (17) is statically connected to the gas valve core (12) through the cooperation of the valve core linkage part (18) and the lower linkage part.

2. The multi-fuel integrated switching valve according to claim 1, characterized in that, At least one of the axes of the first air passage (19) and the second air passage (20) is deviated from the axis of the gas valve core (12).

3. The multi-fuel integrated switching valve according to claim 2, characterized in that, Both the first air passage (19) and the second air passage (20) are offset from the axis of the gas valve core (12).

4. The multi-fuel integrated switching valve according to claim 1, characterized in that, The external rotation drive is equipped with a fuel gear, a first gas fuel gear, a second gas fuel gear, and a stop gear.

5. A switching method, using the multi-fuel integrated switching valve according to any one of claims 1-4, characterized in that, When the gas inlet (13) and the gas outlet (14) are connected through a gas passage, the fuel inlet (15) and the fuel outlet (16) are not connected. When the fuel inlet (15) and the fuel outlet (16) are connected through an oil passage, the gas inlet (13) and the gas outlet (14) are not connected.

6. The switching method according to claim 5, characterized in that, When the first gas passage is connected, both the second gas passage and the fuel passage are blocked; When the second gas passage is connected, both the first gas passage and the fuel passage are blocked; When the fuel passage is connected, both the first and second gas passages are blocked; There is a situation where the first gas passage, the second gas passage, and the fuel passage are all blocked.

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