Multi-fuel switching device

Abstract

The present invention relates to a fuel switching device, specifically a multi-fuel switching device, including a gas unit, the gas unit including a switching valve, the switching valve including a shell having an air inlet and an air outlet, a valve core located between the air inlet and the air outlet is rotatably arranged inside the shell, a first air channel and a second air channel are arranged on the valve core, the first air channel and the second air channel have different cross-sectional sizes, and the air inlet and the air outlet are connected by rotating the valve core to select the first air channel or the second air channel. This solution solves the problem that the fuel switching device in the prior art cannot adapt to three or more fuels, resulting in the inability of the internal combustion engine to maintain the best working state.

Description

Technical Field

[0001] The invention relates to a fuel switching device, in particular to a multi-fuel switching device. Background Art

[0002] When an existing internal combustion engine uses multiple fuels, it is generally a liquid fuel and a gaseous fuel. The switching between liquid fuel and gaseous fuel is generally achieved through a fuel switching device, specifically, by setting corresponding switches on two fuel pipelines to switch off. When the internal combustion engine needs to use three or more fuels, including two or more gaseous fuels, how to enable the internal combustion engine to achieve the best working state is a technical problem to be solved. Summary of the invention

[0003] The purpose of the present invention is to provide a multi-fuel switching device to solve the problem that the fuel switching device in the prior art cannot adapt to three or more fuels, resulting in the internal combustion engine being unable to reach the optimal working state.

[0004] In order to achieve the above-mentioned purpose, the basic scheme of the present invention provides a multi-fuel switching device, including a gas part, the gas part includes a switching valve, the switching valve includes a shell with an air inlet and an air outlet, a valve core located between the air inlet and the air outlet is rotatably arranged inside the shell, a first air channel and a second air channel are arranged on the valve core, the cross-sectional sizes of the first air channel and the second air channel are different, and the air inlet and the air outlet are connected by rotating the valve core to select the first air channel or the second air channel.

[0005] The beneficial effect of this basic solution is that: with such a setting, when switching between two gas fuels, the first gas passage or the second gas passage is selected by the rotation of the valve core to connect the air inlet and the air outlet, so that the internal combustion engine can maintain the best working state when using different gas fuels. And this setting allows the operator to maintain the best working state of the internal combustion engine by simply performing a simple switching operation; at the same time, the structure of this setting is simple, which is conducive to reducing costs.

[0006] Furthermore, the valve core is provided with an inlet opposite to the air inlet, the inlet extends along the rotation axis of the valve core, and the first air channel and the second air channel are both connected to the inlet. Such a configuration can simplify the structure of the valve core, thereby facilitating processing and manufacturing and reducing costs.

[0007] Furthermore, the contour of the valve core area between the end of the first gas channel away from the inlet and the end of the second gas channel away from the inlet is larger than the contour of the gas outlet. With such a configuration, when the valve core rotates to make the valve core area between the first gas channel and the second gas channel face the gas outlet, the gas outlet will be covered and blocked, thereby achieving disconnection between the gas inlet and the gas outlet, and achieving simultaneous cutting off of two gas fuels, thereby facilitating operation.

[0008] Furthermore, the housing is rotatably connected to a rotating shaft, the rotating shaft is statically connected to the valve core, and the rotating shaft is statically connected to a gear feedback device. With such a configuration, the gear feedback device can timely know the position state to which the rotating shaft drives the valve core to rotate, thereby conveniently ensuring the accuracy of the rotation position of the valve core.

[0009] Furthermore, the gear feedback device comprises a rotating part, the rotating part is provided with an elastic abutting part, and the housing is statically connected with a positioning part cooperating with the elastic abutting part. Such a configuration makes the gear feedback device simple in structure and helps to improve reliability.

[0010] Furthermore, the positioning portion is in the shape of a groove, and the elastic abutment portion includes a steel ball that slides with the rotating portion and a spring that drives the steel ball.

[0011] Furthermore, a liquid fuel switching switch is provided, and the liquid fuel switching switch is provided in linkage with the valve core. With such a setting, the liquid fuel and two gas fuels can be switched at the same time by rotating the valve core, which is conducive to simplifying the structure and improving the convenience of operation.

[0012] Furthermore, the liquid fuel switching switch has a feed nozzle and a discharge nozzle, and the liquid fuel switching switch also includes a rotating part linked to the rotating shaft, the rotating part is located between the feed nozzle and the discharge nozzle, and the rotating part is provided with a fuel channel that realizes the connection between the feed nozzle and the discharge nozzle through the rotation of the rotating part.

[0013] Furthermore, it also includes a solenoid valve and a solenoid valve switch for controlling the on and off of the main nozzle of the carburetor, and also includes a protrusion that touches the solenoid valve switch and is arranged in linkage with the rotating shaft. With such an arrangement, the oil supply on and off of the carburetor can be synchronously controlled by the rotation of the valve core, thereby facilitating operation.

[0014] Furthermore, it also includes a flameout switch located on the side of the rotating shaft, and also includes a flameout convex head arranged in linkage with the rotating shaft for triggering the flameout switch. With such an arrangement, it is convenient to achieve the purpose of controlling flameout through the rotation of the rotating shaft, thereby facilitating operation.

[0015] Furthermore, the housing is connected to an ignition angle control switch, and also includes a protrusion that is arranged in linkage with the valve core and cooperates with the ignition angle control switch. With such an arrangement, when the valve core rotates, the ignition angle control switch is triggered by the protrusion, so that when different fuels are used, the problem of engine power loss caused by using different fuels can be avoided by controlling the ignition time. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of an embodiment of a multi-fuel switching device of the present invention;

[0017] Figure 2 for Figure 1 AA section view in;

[0018] Figure 3 for Figure 1 BB section view in;

[0019] Figure 4 for Figure 2 A top view of the fuel channel of the middle rotating part when it is connected to the feed nozzle and the discharge nozzle;

[0020] Figure 5 for Figure 4 A schematic diagram of the fuel channel of the middle rotating part when the feed nozzle and the discharge nozzle are disconnected;

[0021] Figure 6 It is a schematic diagram of the positions of the solenoid valve switch, the flameout switch and the rotating shaft;

[0022] Figure 7 for Figure 1 Schematic diagram of the positioning portion on the middle housing being set to multiple gear positions. DETAILED DESCRIPTION

[0023] The following is further described in detail through specific implementation methods:

[0024] The figure marks in the drawings of the specification include: housing 1, flameout switch 2, solenoid valve switch 3, valve core 4, shaft 5, rotating part 8, rotating part 9, spring 9a, steel ball 9b, positioning part 10, air inlet 11, air outlet 12, feed nozzle 15, fuel channel 16, discharge nozzle 17, first air channel 41, second air channel 42, inlet 43, protrusion 51, flameout boss 52, ignition angle control switch 53, first gas fuel gear C, shutdown flameout gear O, oil cut-off but not flameout gear S, second gas fuel gear N, liquid fuel gear F.

[0025] The embodiment is basically as shown in the attached Figures 1 to 7As shown: a multi-fuel switching device, including a gas part, the gas part includes a switching valve, the switching valve includes a shell 1 with an air inlet 11 and an air outlet 12, in this embodiment, the center line of the air inlet 11 and the center line of the air outlet 12 are perpendicular to each other; the shell 1 is internally rotatably provided with a valve core 4 located between the air inlet 11 and the air outlet 12, the valve core 4 is provided with a first air channel 41 and a second air channel 42, the first air channel 41 and the second air channel 42 are both arranged in a direction perpendicular to the rotation axis 5 of the valve core 4; the cross-sectional sizes of the first air channel 41 and the second air channel 42 are different, and the air inlet 11 and the air outlet 12 are connected by rotating the valve core 4 to select the first air channel 41 or the second air channel 42. The valve core 4 is provided with an inlet 43 opposite to the air inlet 11, and the inlet 43 extends along the rotation axis 5 of the valve core 4, so that the valve core 4 always keeps the inlet 43 connected with the air inlet 11 when rotating; the first air channel 41 and the second air channel 42 are both connected with the inlet 43, so that the first air channel 41 and the second air channel 42 are distributed in a V shape. The contour of the valve core 4 area located between the end of the first air channel 41 away from the inlet 43 and the end of the second air channel 42 away from the inlet 43 on the valve core 4 is larger than the contour of the air outlet 12, so that the valve core 4 area can cover and block the air outlet 12 to cut off the gas fuel.

[0026] The housing 1 is rotatably connected with a rotating shaft 5, which is statically connected with the valve core 4. In this embodiment, the valve core 4 is provided with a long strip slot, and the end of the rotating shaft 5 is provided with a block that matches the slot, and the synchronous rotation of the rotating shaft 5 and the valve core 4 is achieved by the block being inserted into the slot. The rotating shaft 5 is statically connected with a gear feedback device. In this embodiment, the gear feedback device includes a rotating part 9 fixedly connected with the rotating shaft 5, and an elastic abutment part is provided on the rotating part 9. The elastic abutment part includes a steel ball 9b that slides with the rotating part 9 along the radial direction of the rotating shaft 5 and a spring 9a that drives the steel ball 9b; the housing 1 is statically connected with a positioning part 10 that matches the elastic abutment part. In this embodiment, the positioning part 10 is a groove structure integrally formed with the housing 1. The rotating position of the rotating shaft 5 can be positioned by inserting the steel ball 9b of the elastic abutment part into the positioning part 10, so that the valve core 4 stays in the corresponding gear position.

[0027] A liquid fuel switching switch is connected to the housing 1. The liquid fuel switching switch has a feed nozzle 15 and a discharge nozzle 17. The liquid fuel switching switch also includes a rotating part 8 that is arranged in linkage with the rotating shaft 5. In this embodiment, the rotating part 8 is preferably disc-shaped. The rotating part 8 is coaxially integrally formed with the rotating shaft 5. The rotating part 8 is located between the feed nozzle 15 and the discharge nozzle 17. The rotating part 8 is provided with a fuel channel 16 that realizes the connection between the feed nozzle 15 and the discharge nozzle 17 through the rotation of the rotating part 8. In order to improve the structural integrity and assembly convenience, the liquid fuel switching switch and the switching valve share the housing 1, and the liquid fuel switching switch is arranged between the gear feedback device and the valve core 4.

[0028] A solenoid valve and a solenoid valve switch 3 for controlling the on and off of the main nozzle of the carburetor are installed on the side of the rotating shaft 5 on the housing 1, and a protrusion 51 for touching the solenoid valve switch 3 is provided on the rotating shaft 5. A flameout switch 2 is also installed on the side of the rotating shaft 5 on the housing 1, and a flameout protrusion 52 for triggering the flameout switch 2 is provided on the rotating shaft 5. An ignition angle control switch 53 is also installed on the side of the rotating shaft 5 on the housing 1, and a protrusion that cooperates with the ignition angle control switch 53 is provided on the valve core 4 in linkage. In this embodiment, for the convenience of connection, the protrusion is provided on the rotating shaft 5, so as to realize the linkage between the protrusion and the valve core 4, and the rotation of the rotating shaft 5 drives the protrusion to rotate a certain angle, so that corresponding ignition signals can be obtained when using different fuels, so as to realize ignition advance or delay corresponding to different fuels. In order to ensure that the valve core 4 rotates accurately to the corresponding position, the positioning part 10 of the gear feedback device is set to a plurality of groove structures, corresponding to the liquid fuel gear F, the first gas fuel gear C, the second gas fuel gear N, the oil cut-off gear S and the shutdown gear O respectively.

[0029] The specific usage process is as follows: when the internal combustion engine uses the liquid fuel mode, the protrusion 51 contacts the solenoid valve switch 3, so that the solenoid valve switch 3 opens the solenoid valve on the main nozzle of the carburetor. At the same time, the fuel channel 16 on the rotating part 8 connects the feed nozzle 15 and the discharge nozzle 17, and the first air channel 41 and the second air channel 42 on the valve core 4 are not connected to the air inlet 11 and the air outlet 12, so that the fuel in the carburetor can enter the internal combustion engine for combustion. When the internal combustion engine switches from liquid fuel mode to gas fuel mode, the rotating shaft 5 is rotated to separate the protrusion 51 from the solenoid valve switch 3, thereby closing the solenoid valve on the main nozzle of the carburetor, and at the same time, the rotating part 8 also rotates with the rotating shaft 5, so that the feed nozzle 15 and the discharge nozzle 17 are disconnected, and the first air channel 41 or the second air channel 42 on the valve core 4 connects the air inlet 11 and the air outlet 12 (the specific air channel for connection is selected according to the type of gas fuel). At this time, the ignition angle control switch 53 arranged on the side of the rotating shaft 5 is triggered by the protrusion, and the ignition angle control switch 53 identifies the fuel used by the internal combustion engine through the rotation angle of the rotating shaft, and then selects the corresponding ignition angle based on the fuel used.

[0030] The above is only an embodiment of the present invention, and the common knowledge such as the known specific structure and characteristics in the scheme is not described in detail here. It should be pointed out that for those skilled in the art, several modifications and improvements can be made without departing from the structure of the present invention, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicality of the patent.

Claims

1. A multi-fuel switching device, comprising a gas unit, the gas unit comprising a switching valve, the switching valve comprising a housing having an air inlet and an air outlet, a valve core rotatably disposed inside the housing and located between the air inlet and the air outlet, characterized in that: The valve core is provided with a first air channel and a second air channel, the cross-sections of the first air channel and the second air channel are different, and the air inlet and the air outlet are connected by rotating the valve core to select the first air channel or the second air channel; The valve core is provided with an inlet opposite to the air inlet, the inlet extends along the rotation axis direction of the valve core, and the first air channel and the second air channel are both connected to the inlet.

2. The multi-fuel switching device according to claim 1, characterized in that: The contour of the valve core area between one end of the first air channel away from the inlet and one end of the second air channel away from the inlet is larger than the contour of the air outlet.

3. The multi-fuel switching device according to any one of claims 1 to 2, characterized in that: The housing is rotatably connected with a rotating shaft, the rotating shaft is statically connected to the valve core, and the rotating shaft is statically connected with a gear feedback device.

4. The multi-fuel switching device according to claim 3, characterized in that: The gear feedback device comprises a rotating part, an elastic abutting part is arranged on the rotating part, and a positioning part cooperating with the elastic abutting part is statically connected to the housing.

5. The multi-fuel switching device according to claim 4, characterized in that: The positioning portion is in a groove shape, and the elastic contact portion includes a steel ball that is slidably matched with the rotating portion and a spring that drives the steel ball.

6. The multi-fuel switching device according to claim 1, 2, 4 or 5, characterized in that: It also includes a liquid fuel switching switch, which is arranged in linkage with the valve core.

7. The multi-fuel switching device according to claim 3, characterized in that: It also includes a liquid fuel switching switch, which is arranged in linkage with the valve core.

8. The multi-fuel switching device according to claim 6, characterized in that: The liquid fuel switching switch has a feed nozzle and a discharge nozzle, and also includes a rotating part linked to the rotating shaft, the rotating part is located between the feed nozzle and the discharge nozzle, and the rotating part is provided with a fuel channel that realizes the connection between the feed nozzle and the discharge nozzle through the rotation of the rotating part.

9. The multi-fuel switching device according to claim 7, characterized in that: The liquid fuel switching switch has a feed nozzle and a discharge nozzle, and also includes a rotating part linked to the rotating shaft, the rotating part is located between the feed nozzle and the discharge nozzle, and the rotating part is provided with a fuel channel that realizes the connection between the feed nozzle and the discharge nozzle through the rotation of the rotating part.

10. The multi-fuel switching device according to claim 8 or 9, characterized in that: It also includes a solenoid valve and a solenoid valve switch for controlling the on and off of a main nozzle of a carburetor, and a raised portion that touches the solenoid valve switch and is linked with the rotating shaft.

11. The multi-fuel switching device according to claim 10, characterized in that: It also includes a flameout switch located on the side of the rotating shaft, and a flameout protrusion linked with the rotating shaft for triggering the flameout switch.

12. The multi-fuel switching device according to claim 1, 2, 4, 5, 7, 8, 9 or 11, characterized in that: The housing is connected to an ignition angle control switch and also includes a protrusion which is arranged in linkage with the valve core and cooperates with the ignition angle control switch.

13. The multi-fuel switching device according to claim 3, characterized in that: The housing is connected to an ignition angle control switch and also includes a protrusion which is arranged in linkage with the valve core and cooperates with the ignition angle control switch.

14. The multi-fuel switching device according to claim 6, characterized in that: The housing is connected to an ignition angle control switch and also includes a protrusion which is arranged in linkage with the valve core and cooperates with the ignition angle control switch.

15. The multi-fuel switching device according to claim 10, characterized in that: The housing is connected to an ignition angle control switch and also includes a protrusion which is arranged in linkage with the valve core and cooperates with the ignition angle control switch.

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