Automatic dual-fuel switching outboard engine carburetor

Abstract

The utility model relates to the technical field of engine accessories, in particular to an automatic switching dual-fuel outboard engine carburetor, an oil cup is connected with a kerosene fuel pump and a gasoline fuel pump, and a driving assembly has a first state in which a first negative pressure channel is communicated and a second negative pressure channel is blocked. The driving assembly further has a second state for blocking the first negative pressure channel and communicating with the second negative pressure channel, and further has a third state for communicating the first negative pressure channel and the second negative pressure channel at the same time, and when the driving assembly is in the first state, the oil cup conveys oil only through the gasoline fuel pump. When the driving assembly is in the first state, the oil cup conveys oil only through the kerosene fuel pump, when the driving assembly is in the second state, the oil cup conveys oil through the gasoline fuel pump and the kerosene fuel pump at the same time, and when the driving assembly is in the third state, the oil cup conveys oil through the gasoline fuel pump and the kerosene fuel pump at the same time. And flexible replacement and utilization of different fuels are realized.

Description

Technical Field

[0001] The utility model relates to the technical field of engine accessories, in particular to an automatic switching dual-fuel outboard engine carburetor. Background Art

[0002] A carburetor is a mechanical device that mixes a certain proportion of gasoline and air under the vacuum generated by the working engine. As a precision mechanical device, the carburetor uses the kinetic energy of the inhaled air flow to atomize the gasoline. The carburetor will automatically mix the corresponding concentration and output the corresponding amount of mixed gas according to the different working conditions of the engine. In order to make the mixed gas more evenly mixed, the carburetor also has the effect of atomizing the fuel for the normal operation of the machine.

[0003] The engine used in ships is called an outboard motor. The outboard motor is also equipped with a carburetor. The carburetor of the outboard motor is usually equipped with an oil pump for delivering gasoline. With the shortage of gasoline resources and the rising cost, dual-fuel carburetors were introduced to solve the problem.

[0004] The operation mode of a dual-fuel carburetor is usually to use gasoline at startup and idling, and to use kerosene at high speed. However, the structure for switching fuels in the dual-fuel carburetor of the prior art is complex, and there is also the problem of slow fuel switching speed. Utility Model Content

[0005] The purpose of the utility model is to overcome the shortcomings and deficiencies of the prior art and to provide an automatic switching dual-fuel outboard motor carburetor. The utility model has a streamlined fuel switching structure, can stably and quickly switch between two fuels, and realizes flexible replacement and utilization between different fuels.

[0006] The technical scheme adopted by the utility model is as follows: an automatic switching dual-fuel outboard carburetor, comprising a carburetor body, an oil cup connected to the carburetor body, and a driving assembly arranged on the carburetor body for connecting to the outboard engine throttle, the oil cup is connected to a kerosene fuel pump and a gasoline fuel pump, the kerosene fuel pump and the gasoline fuel pump are both used to deliver oil to the oil cup, the carburetor body is provided with a first negative pressure channel connected to the gasoline fuel pump and a second negative pressure channel connected to the kerosene fuel pump, the driving assembly has a first state of connecting to the first negative pressure channel and blocking the second negative pressure channel, the driving assembly also has a second state of blocking the first negative pressure channel and connecting to the second negative pressure channel, the driving assembly also has a third state of simultaneously connecting the first negative pressure channel and the second negative pressure channel, when the driving assembly is in the first state, the oil cup delivers oil only through the gasoline fuel pump, when the driving assembly is in the second state, the oil cup delivers oil only through the kerosene fuel pump, and when the driving assembly is in the third state, the oil cup delivers oil simultaneously through the gasoline fuel pump and the kerosene fuel pump.

[0007] The driving assembly includes a rotating shaft, a first movable member and a second movable member, one end of the first movable member is sleeved on the rotating shaft and the other end is plugged with a first plug for blocking or connecting the first negative pressure channel, one end of the second movable member is sleeved on the rotating shaft and the other end is plugged with a second plug for blocking or connecting the second negative pressure channel, the rotating shaft simultaneously drives the first movable member and the second movable member to reciprocate along the axial direction of the rotating shaft, when the driving assembly is in the first state, the second plug blocks the second negative pressure channel, and when the driving assembly is in the second state, the first plug blocks the first negative pressure channel.

[0008] An air intake passage and a through hole that crosses the air intake passage are provided inside the carburetor body, the rotating shaft is passed through the through hole and both ends extend to the outside, the first negative pressure channel and the second negative pressure channel are respectively located on both sides of the air intake passage, a first through hole for a first plug to extend into is provided on the side wall of the first negative pressure channel, a second through hole for a second plug to extend into is provided on the side wall of the second negative pressure channel, and the first movable part and the second movable part are respectively jacketed on both ends of the rotating shaft.

[0009] The rotating shaft is rotatably connected to the carburetor body, and a first pin is provided at a position of the rotating shaft corresponding to the first movable part and a second pin is provided at a position corresponding to the second movable part. The first movable part has a first groove recessed at one end away from the through hole, and the second movable part has a second groove recessed at one end away from the through hole. When the driving component is in a first state, the first pin slides into the first groove and the second pin slides out of the second groove. When the driving component is in a second state, the first pin slides out of the first groove and the second pin slides into the second groove.

[0010] The rotating shaft is also covered with a first spring and a second spring. One end of the first spring abuts against the first movable member and the other end abuts against the through hole. One end of the second spring abuts against the second movable member and the other end abuts against the through hole.

[0011] The first groove and the second groove are both grooves of V-shaped structure.

[0012] The two inner walls of the first groove are the first guide slope and the first limiting slope with different slopes, and the two inner walls of the second groove are the second guide slope and the second limiting slope with different slopes. When the rotating shaft rotates, the first pin shaft slides back and forth along the first guide slope and the second pin shaft slides back and forth along the second guide slope.

[0013] A throttle plate connected to a rotating shaft is provided in the air intake passage, and an air hole is opened on the throttle plate. When the driving component is in a first state, the air intake passage is blocked by the throttle plate and the air intake passage is only connected through the air hole. When the driving component is in a second state, the air intake passage is opened by the throttle plate.

[0014] The first movable part is provided with a first boss for the first spring to extend into, the second movable part is provided with a second boss for the second spring to extend into, the through hole is provided with a third boss for the first spring to extend into and a fourth boss for the second spring to extend into, one end of the first spring extends into the first boss to form abutment and the other end extends into the third boss to form abutment, one end of the second spring extends into the second boss to form abutment and the other end extends into the fourth boss to form abutment.

[0015] The first pin shaft and the second pin shaft are both plug-connected with the rotating shaft.

[0016] The beneficial effects of the utility model are as follows: the utility model has a streamlined fuel switching structure, that is, the outboard motor throttle drives the driving component to move, and the driving component controls the connection or blocking of the first negative pressure channel and the second negative pressure channel. When the throttle is stationary, that is, the outboard motor is idling, the driving component remains in the first state. In the first state, only the first negative pressure channel is connected, and only the gasoline fuel pump delivers oil to the oil cup. When the throttle is increased, that is, the outboard motor is at high speed, the driving component remains in the second state. In the second state, only the second negative pressure channel is connected, and only the kerosene fuel pump delivers oil to the oil cup. In the utility model, both the kerosene fuel pump and the gasoline fuel pump adopt diaphragm fuel pumps. The oil delivery channel of the diaphragm fuel pump requires the opening of the negative pressure channel to deliver oil normally. When the negative pressure channel is blocked, the corresponding fuel pump will immediately stop delivering oil, and can automatically switch between the two fuels stably and quickly, realizing flexible replacement and utilization between different fuels. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, without paying creative labor, other drawings obtained based on these drawings still belong to the scope of the utility model.

[0018] Figure 1 This is a schematic diagram of the structure of an automatic switching dual-fuel outboard engine carburetor of the utility model;

[0019] Figure 2 It is a structural schematic diagram of another perspective of the utility model;

[0020] Figure 3 It is a main schematic diagram of the utility model;

[0021] Figure 4 It is a structural schematic diagram of the driving component in the utility model;

[0022] Figure 5 for Figure 4 A schematic diagram of the local enlarged structure at point A in the middle;

[0023] Figure 6 It is a structural schematic diagram of the driving component in the utility model from another perspective;

[0024] Figure 7 for Figure 6 A schematic diagram of the local enlarged structure at B in the middle;

[0025] Figure 8 It is a schematic diagram of a partially enlarged structure of the first through hole in the utility model;

[0026] Fig. 9 It is a partial enlarged structural schematic diagram of the second through hole in the utility model;

[0027] In the figure, 1-carburetor body, 2-oil cup, 3-drive assembly, 4-kerosene fuel pump, 5-gasoline fuel pump, 6-first negative pressure channel, 7-second negative pressure channel, 8-rotating shaft, 9-first movable part, 10-second movable part, 11-first plug, 12-second plug, 13-intake channel, 14-through hole, 15-first through hole, 16-second through hole, 17-first pin, 18-second pin, 19-first groove, 20-second groove, 21-first spring, 22-second spring, 23-first guide slope, 24-first limiting slope, 25-throttle plate, 26-air hole, 27-first boss, 28-second boss, 29-third boss, 30-fourth boss, 31-second guide slope, 32-second limiting slope. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solutions and advantages of the utility model clearer, the utility model will be further described in detail below with reference to the accompanying drawings.

[0029] It should be noted that all expressions using "first" and "second" in the embodiments of the present invention are for distinguishing two non-identical entities with the same name or non-identical parameters. It can be seen that "first" and "second" are only for the convenience of expression and should not be understood as limitations on the embodiments of the present invention. The subsequent embodiments will not explain this one by one.

[0030] The directions and positions mentioned in the present invention, such as "upper", "lower", "front", "back", "left", "right", "inside", "outside", "top", "bottom", "side", etc., are only for reference to the directions or positions of the drawings. Therefore, the directions and positions used are used to explain and understand the present invention, but not to limit the scope of protection of the present invention.

[0031] like Figures 1 to 9 As shown in the figure, an embodiment of the utility model is an automatic switching dual-fuel outboard carburetor, comprising a carburetor body 1, an oil cup 2 connected to the carburetor body 1, and a drive assembly 3 arranged on the carburetor body 1 for connecting to the outboard engine throttle, the oil cup 2 is connected to a kerosene fuel pump 4 and a gasoline fuel pump 5, the kerosene fuel pump 4 and the gasoline fuel pump 5 are both used to supply oil to the oil cup 2, the carburetor body 1 is provided with a first negative pressure channel 6 connected to the gasoline fuel pump 5 and a second negative pressure channel 7 connected to the kerosene fuel pump 4, the drive assembly 3 has ... The drive component 3 also has a first state of blocking the first negative pressure channel 6 and connecting to the second negative pressure channel 7, the drive component 3 also has a second state of blocking the first negative pressure channel 6 and connecting to the second negative pressure channel 7, the drive component 3 also has a third state of connecting the first negative pressure channel 6 and the second negative pressure channel 7 at the same time, when the drive component 3 is in the first state, the oil cup 2 only delivers oil through the gasoline fuel pump 5, when the drive component 3 is in the second state, the oil cup 2 only delivers oil through the kerosene fuel pump 4, and when the drive component 3 is in the third state, the oil cup 2 delivers oil through both the gasoline fuel pump 5 and the kerosene fuel pump 3.

[0032] The beneficial effects of such an arrangement are as follows. The utility model has a streamlined fuel switching structure, that is, the outboard motor throttle drives the drive assembly to move, and the drive assembly controls the connection or blocking of the first negative pressure channel and the second negative pressure channel. When the throttle is stationary, that is, when the outboard motor is idling, the drive assembly remains in the first state. In the first state, only the first negative pressure channel is connected, and only the gasoline fuel pump delivers oil to the oil cup. When the throttle is increased, that is, when the outboard motor is at high speed, the drive assembly remains in the second state. In the second state, only the second negative pressure channel is connected, and only the kerosene fuel pump delivers oil to the oil cup. The third state is a transitional stage state when switching back and forth between the first state and the second state. In the utility model, both the kerosene fuel pump and the gasoline fuel pump adopt a diaphragm fuel pump. The oil delivery channel of the diaphragm fuel pump requires the opening of the negative pressure channel to deliver oil normally. When the negative pressure channel is blocked, the corresponding fuel pump will immediately stop delivering oil, and can automatically switch between the two fuels stably and quickly, realizing flexible replacement and utilization between different fuels.

[0033] It is further configured that the driving assembly 3 includes a rotating shaft 8, a first movable part 9 and a second movable part 10, one end of the first movable part 9 is sleeved on the rotating shaft 8 and the other end is plugged with a first plug 11 for blocking or connecting the first negative pressure channel 6, one end of the second movable part 10 is sleeved on the rotating shaft 8 and the other end is plugged with a second plug 12 for blocking or connecting the second negative pressure channel 7, the rotating shaft 8 simultaneously drives the first movable part 9 and the second movable part 10 to reciprocate axially along the rotating shaft 8, when the driving assembly 3 is in the first state, the second plug 12 blocks the second negative pressure channel 7, and when the driving assembly 3 is in the second state, the first plug 11 blocks the first negative pressure channel 6.

[0034] The beneficial effects of such a configuration are as follows: the rotating shaft drives the first plug connected to the first movable member to block or conduct the first negative pressure channel, and at the same time drives the second plug of the second movable member to perform an action opposite to the first plug on the second negative pressure channel. The driving component of this structure has a clever advantage and can accurately and stably block the negative pressure channel, thereby ensuring fast and stable fuel switching.

[0035] It is further configured that an intake channel 13 and a through hole 14 that crosses the intake channel 13 are provided inside the carburetor body 1, the rotating shaft 8 is inserted into the through hole 14 and both ends extend to the outside, the first negative pressure channel 6 and the second negative pressure channel 7 are respectively located on both sides of the intake channel 13, the side wall of the first negative pressure channel 6 is provided with a first through hole 15 for the first plug 11 to extend into, the side wall of the second negative pressure channel 7 is provided with a second through hole 16 for the second plug 12 to extend into, and the first movable part 9 and the second movable part 10 are respectively jacketed on both ends of the rotating shaft 8.

[0036] The beneficial effects of such a setting are as follows: the layout of this structure is more reasonable, the first plug slides back and forth in the first through hole, and the second plug slides back and forth in the second through hole, and is installed on both sides of the carburetor body, which will not affect the installation of the carburetor and will not interfere with the intake channel. It is easy to install, and the movement positions of the first movable part and the second movable part, as well as the opening and closing conditions of the first negative pressure channel and the second negative pressure channel can be intuitively observed.

[0037] It is further configured that the rotating shaft 8 is rotatably connected to the carburetor body 1, and the rotating shaft 8 is provided with a first pin shaft 17 at a position corresponding to the first movable part 9 and a second pin shaft 18 at a position corresponding to the second movable part 10, the first movable part 9 is recessed with a first groove 19 at one end away from the through hole 14, and the second movable part 10 is recessed with a second groove 20 at one end away from the through hole 14, when the driving component 3 is in the first state, the first pin shaft 17 slides into the first groove 19 and the second pin shaft 18 slides out of the second groove 20, and when the driving component 3 is in the second state, the first pin shaft 17 slides out of the first groove 19 and the second pin shaft 18 slides into the second groove 20.

[0038] The beneficial effects of such a configuration are as follows: when the shaft rotates, the first movable member and the second movable member will not be driven to rotate, and the first movable member and the second movable member will only reciprocate along the axial direction of the shaft. When the shaft rotates, the directions of the first pin and the second pin are changed, and the first movable member and the second movable member are matched with the corresponding first pin and second pin through the first groove and the second groove respectively. When the outboard motor is at idle speed, the first pin rotates to one side of the first groove, and the first movable member can move toward the first pin, and at the same time drive the first plug to open the first negative pressure channel, while the second pin rotates out of the second groove and abuts against the end of the second movable member, and the second movable member moves in the direction away from the second pin, and at the same time drives the second plug to block the second negative pressure channel. When the outboard motor is at high speed, the situation is opposite. The sophisticated switching structure can ensure a stable operating effect.

[0039] Furthermore, the rotating shaft 8 is also covered with a first spring 21 and a second spring 22 , wherein one end of the first spring 21 abuts against the first movable member 9 and the other end abuts against the through hole 14 , and one end of the second spring 22 abuts against the second movable member 10 and the other end abuts against the through hole 14 .

[0040] The beneficial effects of such a configuration are as follows: the first spring and the second spring respectively help the first movable member and the second movable member to rebound to the correct working position, and cooperate with the rotation of the shaft to achieve an automatic switching effect.

[0041] It is further provided that the first groove 19 and the second groove 20 are both grooves of V-shaped structure.

[0042] The beneficial effect of such a configuration is as follows: the groove of the V-shaped structure facilitates the first pin shaft and the second pin shaft to slide in or out, thereby helping the first movable member and the second movable member to slide flexibly.

[0043] It is further configured that the two inner walls of the first groove 19 are a first guide slope 23 and a first limit slope 24 with different slopes, and the two inner walls of the second groove 20 are a second guide slope 31 and a second limit slope 32 with different slopes. When the rotating shaft 8 rotates, the first pin shaft 17 slides back and forth along the first guide slope 23 and the second pin shaft 18 slides back and forth along the second guide slope 31.

[0044] The beneficial effects of such a setting are as follows: the inclination of the first guide slope is greater than that of the first limiting slope, and the inclination of the second guide slope is greater than that of the second limiting slope. When the rotating shaft rotates, the first pin shaft slides back and forth along the first guide slope and the second pin shaft slides back and forth along the second guide slope, which is the third state of the driving assembly. The first limiting slope is used to block the first pin shaft, and the second limiting slope is used to block the second pin shaft, thereby limiting the moving paths of the first movable part and the second movable part to ensure normal and accurate switching.

[0045] It is further configured that a throttle plate 25 connected to the rotating shaft 8 is provided in the intake passage 13, and an air hole 26 is opened on the throttle plate 25. When the drive component 3 is in a first state, the intake passage 13 is blocked by the throttle plate 25 and the intake passage 13 is only connected through the air hole 26. When the drive component 3 is in a second state, the intake passage 13 is opened by the throttle plate 25.

[0046] The beneficial effects of such a configuration are as follows: when the outboard engine is idling, the throttle plate is used to reduce the flow of the intake passage and only relies on the air hole flow; when the outboard engine is running at high speed, the throttle plate is opened to increase the flow of the intake passage.

[0047] It is further configured that the first movable member 9 is provided with a first boss 27 for the first spring 21 to extend into, the second movable member 10 is provided with a second boss 28 for the second spring 22 to extend into, the through hole 14 is provided with a third boss 29 for the first spring 21 to extend into, and a fourth boss 30 for the second spring 22 to extend into, one end of the first spring 21 extends into the first boss 27 to form abutment and the other end extends into the third boss 29 to form abutment, one end of the second spring 22 extends into the second boss 28 to form abutment and the other end extends into the fourth boss 30 to form abutment.

[0048] The beneficial effects of such an arrangement are as follows: the first spring is limited by the first boss and the third boss, and the second spring is limited by the second boss and the fourth boss, so that the first spring and the second spring are protected from normal compression or rebound and from dislocation and torsion.

[0049] It is further provided that the first pin shaft 17 and the second pin shaft 18 are both plug-connected to the rotating shaft 8 .

[0050] The beneficial effects of such an arrangement are as follows: both the first pin shaft and the second pin shaft are connected to the rotating shaft by plug-in connection, which is convenient for assembly and disassembly.

[0051] The above disclosure is only a preferred embodiment of the present invention, and certainly cannot be used to limit the scope of rights of the present invention. Therefore, equivalent changes made according to the claims of the present invention are still within the scope covered by the present invention.

Claims

1. An automatic switching dual-fuel outboard engine carburetor, comprising a carburetor body (1), an oil cup (2) connected to the carburetor body (1), and a drive assembly (3) arranged on the carburetor body (1) and connected to an outboard engine throttle, characterized in that: The oil cup (2) is connected to a kerosene fuel pump (4) and a gasoline fuel pump (5), and the kerosene fuel pump (4) and the gasoline fuel pump (5) are both used to deliver oil to the oil cup (2). The carburetor body (1) is provided with a first negative pressure channel (6) connected to the gasoline fuel pump (5) and a second negative pressure channel (7) connected to the kerosene fuel pump (4). The drive component (3) has a first state of connecting to the first negative pressure channel (6) and blocking the second negative pressure channel (7). The drive component (3) also has a first state of blocking the first negative pressure channel ( The drive assembly (3) further has a third state in which the first negative pressure channel (6) and the second negative pressure channel (7) are simultaneously connected. When the drive assembly (3) is in the first state, the oil cup (2) delivers oil only through the gasoline fuel pump (5). When the drive assembly (3) is in the second state, the oil cup (2) delivers oil only through the kerosene fuel pump (4). When the drive assembly (3) is in the third state, the oil cup (2) delivers oil simultaneously through the gasoline fuel pump (5) and the kerosene fuel pump (4).

2. The automatic switching dual fuel outboard engine carburetor according to claim 1, characterized in that: The driving assembly (3) comprises a rotating shaft (8), a first movable member (9) and a second movable member (10); one end of the first movable member (9) is sleeved on the rotating shaft (8) and the other end is plugged with a first plug (11) for blocking or connecting the first negative pressure channel (6); one end of the second movable member (10) is sleeved on the rotating shaft (8) and the other end is plugged with a second plug (12) for blocking or connecting the second negative pressure channel (7); the rotating shaft (8) simultaneously drives the first movable member (9) and the second movable member (10) to reciprocate along the axial direction of the rotating shaft (8); when the driving assembly (3) is in the first state, the second plug (12) blocks the second negative pressure channel (7); when the driving assembly (3) is in the second state, the first plug (11) blocks the first negative pressure channel (6).

3. The automatic switching dual fuel outboard engine carburetor according to claim 2, characterized in that: The carburetor body (1) is provided with an air intake passage (13) and a through hole (14) that crosses the air intake passage (13); the rotating shaft (8) is inserted into the through hole (14) and its two ends extend to the outside; the first negative pressure passage (6) and the second negative pressure passage (7) are respectively located on both sides of the air intake passage (13); a first through hole (15) for a first plug (11) to extend into is formed on the side wall of the first negative pressure passage (6); a second through hole (16) for a second plug (12) to extend into is formed on the side wall of the second negative pressure passage (7); and the first movable member (9) and the second movable member (10) are respectively sleeved on the two ends of the rotating shaft (8).

4. The automatic switching dual fuel outboard engine carburetor according to claim 3, characterized in that: The rotating shaft (8) is rotatably connected to the carburetor body (1); a first pin shaft (17) is provided at a position of the rotating shaft (8) corresponding to the first movable member (9) and a second pin shaft (18) is provided at a position corresponding to the second movable member (10); a first groove (19) is recessed at one end of the first movable member (9) away from the through hole (14); a second groove (20) is recessed at one end of the second movable member (10) away from the through hole (14); when the driving component (3) is in a first state, the first pin shaft (17) slides into the first groove (19) and the second pin shaft (18) slides out of the second groove (20); when the driving component (3) is in a second state, the first pin shaft (17) slides out of the first groove (19) and the second pin shaft (18) slides into the second groove (20).

5. The automatic switching dual fuel outboard engine carburetor according to claim 4, characterized in that: The rotating shaft (8) is also covered with a first spring (21) and a second spring (22); one end of the first spring (21) abuts against the first movable member (9) and the other end abuts against the through hole (14); one end of the second spring (22) abuts against the second movable member (10) and the other end abuts against the through hole (14).

6. The automatic switching dual fuel outboard engine carburetor according to claim 4, characterized in that: The first groove (19) and the second groove (20) are both grooves of V-shaped structure.

7. The automatic switching dual fuel outboard engine carburetor according to claim 6, characterized in that: The two inner walls of the first groove (19) are a first guiding inclined surface (23) and a first limiting inclined surface (24) with different inclinations, and the two inner walls of the second groove (20) are a second guiding inclined surface (31) and a second limiting inclined surface (32) with different inclinations. When the rotating shaft (8) rotates, the first pin shaft (17) slides back and forth along the first guiding inclined surface (23) and the second pin shaft (18) slides back and forth along the second guiding inclined surface (31).

8. The automatic switching dual fuel outboard engine carburetor according to claim 3, characterized in that: A throttle plate (25) connected to the rotating shaft (8) is provided in the air intake passage (13), and an air hole (26) is provided on the throttle plate (25). When the drive assembly (3) is in a first state, the air intake passage (13) is blocked by the throttle plate (25) and the air intake passage (13) is connected only through the air hole (26). When the drive assembly (3) is in a second state, the air intake passage (13) is opened by the throttle plate (25).

9. The automatic switching dual fuel outboard engine carburetor according to claim 5, characterized in that: The first movable member (9) is provided with a first boss (27) for the first spring (21) to extend into, the second movable member (10) is provided with a second boss (28) for the second spring (22) to extend into, the through hole (14) is provided with a third boss (29) for the first spring (21) to extend into, and a fourth boss (30) for the second spring (22) to extend into, one end of the first spring (21) extends into the first boss (27) to form abutment and the other end extends into the third boss (29) to form abutment, one end of the second spring (22) extends into the second boss (28) to form abutment and the other end extends into the fourth boss (30) to form abutment.

10. The automatic switching dual fuel outboard engine carburetor according to claim 4, characterized in that: The first pin shaft (17) and the second pin shaft (18) are both plug-connected to the rotating shaft (8).

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