Fuel gas-fuel oil automatic switching system

Abstract

The utility model relates to the technical field of fuel systems, in particular to a fuel gas-fuel oil automatic switching system which comprises an electronic injection valve, a fuel gas control valve and an engine. The electronic injection valve is installed on an engine and comprises a valve body, an electronic controller and a fuel nozzle, the electronic controller and the fuel nozzle are arranged on the valve body, and the fuel nozzle is used for supplying fuel to the engine. The fuel gas control valve is communicated with the engine through a pipeline and used for supplying gas to the engine, a pressure sensor is arranged on the fuel gas control valve, the pressure sensor is electrically connected with the electronic controller, and the pressure sensor is used for detecting fuel gas pressure and transmitting a fuel gas pressure signal to the electronic controller. The electronic controller is used for automatically controlling opening and closing of the gas control valve and the electronic injection valve according to the gas pressure signal. The fuel gas and fuel oil switching method has the effect of improving the intelligence and convenience of fuel gas and fuel oil switching.

Description

Technical Field

[0001] This application relates to the technical field of fuel systems, and particularly to a gas-fuel automatic switching system. Background Art

[0002] With the increasingly widespread use of three fuels, namely gasoline, LPG, and NG, in general-purpose engines, gas fuels are more economical and environmentally friendly than gasoline. Therefore, we usually consider giving priority to burning gas fuels during use. However, currently, the selection and use of different fuels usually still adopt a manual selection method, making it difficult to achieve automatic fuel switching. It is necessary to stop the machine to change the fuel type, resulting in poor intelligence and convenience. Content of the Utility Model

[0003] In order to improve the intelligence and convenience of gas and fuel switching, this application provides a gas-fuel automatic switching system.

[0004] The gas-fuel automatic switching system provided by this application adopts the following technical solutions:

[0005] A gas-fuel automatic switching system includes an electronic fuel injection valve, a gas control valve, and an engine;

[0006] The electronic fuel injection valve is installed on the engine. The electronic fuel injection valve includes a valve body, an electronic controller, and a fuel nozzle. The electronic controller and the fuel nozzle are arranged on the valve body, and the fuel nozzle is used to supply fuel to the engine;

[0007] The gas control valve is connected to the engine through a pipeline for supplying gas to the engine. A pressure sensor is arranged on the gas control valve. The pressure sensor is electrically connected to the electronic controller. The pressure sensor is used to detect the gas pressure and transmit the gas pressure signal to the electronic controller. The electronic controller is used to automatically control the opening and closing of the gas control valve and the electronic fuel injection valve according to the gas pressure signal.

[0008] By adopting the above technical solutions:

[0009] When the engine is not started:

[0010] When no gas fuel is connected, the pressure sensor does not detect pressure, and the electronic controller executes the fuel combustion program; start the engine, a negative pressure is generated in the intake passage of the engine, fresh air enters, gasoline fuel is ejected through the fuel nozzle and mixed with the air to enter the combustion chamber, and the engine runs normally.

[0011] When gas fuel is connected, the pressure sensor detects the pressure and transmits the signal to the electronic controller. The electronic controller executes the gas combustion program; start the engine, a negative pressure is generated in the intake passage, fresh air enters, gas fuel is ejected through the gas control valve and mixed with the air to enter the combustion chamber, and the engine runs normally.

[0012] When the engine starts and runs:

[0013] When the engine runs on gaseous fuel, the electronic controller executes the gas combustion program; when the gaseous fuel suddenly runs out or is interrupted and the pressure sensor detects that the fuel pressure value is less than the set pressure value, the electronic controller quickly makes a judgment, executes the fuel combustion program, the gas control valve stops working, and the fuel is sprayed through the fuel nozzle, mixed with air and enters the combustion chamber, and the engine runs normally.

[0014] When the engine runs on fuel, the electronic controller executes the fuel combustion program; when gaseous fuel is suddenly connected and the pressure sensor detects that the gas pressure is greater than the set value, the electronic controller quickly makes a judgment, executes the gas combustion program, the fuel nozzle stops working, and the gaseous fuel is sprayed through the gas control valve, mixed with air and enters the combustion chamber, and the engine runs normally.

[0015] The entire gas-fuel switching system does not require manual control, realizes automatic switching, and helps to improve the intelligence and convenience of gas and fuel switching. And through the control of the electronic controller, the combustion program and the execution components accurately execute their respective instructions, enabling the engine to achieve a better combustion state, with better performance, and being more economical and environmentally friendly.

[0016] Optionally, it further includes a fuel switch, the fuel switch includes an LPG gear and a CNG gear, and the fuel switch is electrically connected to the gas control valve for controlling the type of gas introduced.

[0017] By adopting the above technical solution, when different gases need to be used, corresponding selections can be made through the fuel switch. Rotate to the LPG gear when using LPG, and rotate to the CNG gear when using CNG, so as to realize the selection of different gases.

[0018] Optionally, the engine includes a body and an air filter provided on the body. The space between the air filter and the body is an installation space. The electronic injection valve is provided at the installation space, and both sides of the electronic injection valve are respectively communicated with the air filter and the body.

[0019] By adopting the above technical solution, the fresh air entering the generator can be filtered by the air filter first, reducing the impurities entering the engine, and thus reducing the possibility of engine damage.

[0020] Optionally, the air filter includes a detachable housing and an installation frame provided in the housing, and a filter sponge is provided in the installation frame.

[0021] By adopting the above technical solution, the filtering part has a simple structure, is convenient to install, and the housing can be disassembled to replace the filter sponge, improving the long-term filtering effect.

[0022] Optionally, a heat dissipation frame is provided at the bottom of the body. A plurality of heat dissipation ribs are fixedly connected inside the heat dissipation frame. The plurality of heat dissipation ribs are arranged at intervals to form a plurality of heat dissipation channels, and the heat dissipation channels communicate with the inside of the body.

[0023] Optionally, the plurality of heat dissipation ribs are arranged in an outward expanding manner from the middle of the installation frame to both ends.

[0024] By adopting the above technical solution, the heat dissipation channels contribute to the heat dissipation of the engine. At the same time, the plurality of heat dissipation ribs are arranged in an outward expanding manner from the middle of the installation frame to both ends, which can improve the heat dissipation effect.

[0025] In summary, the present application includes at least one of the following beneficial technical effects:

[0026] 1. The entire gas-fuel switching system does not require manual control and realizes automatic switching, which helps to improve the intelligence and convenience of gas and fuel switching; and through the control of the electronic controller, the combustion program and the execution components accurately execute their respective instructions, enabling the engine to reach a better combustion state, with better performance, and being more economical and environmentally friendly;

[0027] 2. When different gases need to be used, corresponding selections are made through the fuel switch. When using LPG, rotate to the LPG gear, and when using CNG, rotate to the CNG gear, thereby realizing the selection of different gases. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the overall structure of a gas-fuel automatic switching system according to an embodiment of the present application.

[0029] Figure 2 It is a schematic diagram for showing the structure of the installation frame in an embodiment of the present application.

[0030] Figure 3 It is a schematic diagram for showing the structure of the heat dissipation ribs in an embodiment of the present application.

[0031] Description of the reference numerals: 1, electronic fuel injection valve; 11, valve body; 12, electronic controller; 13, fuel nozzle; 2, gas control valve; 21, pressure sensor; 3, engine; 31, body; 32, air filter; 4, installation space; 5, housing; 6, installation frame; 7, heat dissipation frame; 8, heat dissipation rib. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0032] The following further describes the present application in detail with reference to the attached Figures 1-3 drawings.

[0033] An embodiment of the present application discloses a gas-fuel automatic switching system. Refer to Figure 1, the gas-fuel automatic switching system includes an electronic injection valve 1, a gas control valve 2, an engine 3, and a fuel switch. The electronic injection valve 1 is installed on the engine 3. The electronic injection valve 1 includes a valve body 11, an electronic controller 12, and a fuel nozzle 13. The electronic controller 12 and the fuel nozzle 13 are arranged on the valve body 11, and the fuel nozzle 13 is used to supply fuel to the engine 3.

[0034] Referring to the figure, the gas control valve 2 is connected to the engine 3 through a pipeline for supplying gas to the engine 3. A pressure sensor 21 is arranged on the gas control valve 2. The pressure sensor 21 is electrically connected to the electronic controller 12. The pressure sensor 21 is used to detect the gas pressure and transmit the gas pressure signal to the electronic controller 12. The electronic controller 12 is used to automatically control the opening and closing of the gas control valve 2 and the electronic injection valve 1 according to the gas pressure signal. The fuel switch is not shown in the attached drawings of the embodiments of the present application and can be set and connected according to the actual situation. The fuel switch includes an LPG gear and a CNG gear. The fuel switch is electrically connected to the gas control valve 2 for controlling the type of gas introduced. When different gases need to be used, corresponding selection is made through the fuel switch. Rotate to the LPG gear when using LPG, and rotate to the CNG gear when using CNG, so as to realize the selection of different gases.

[0035] Referring to Figures 1-2 , the engine 3 includes a body 31 and an air filter 32 arranged on the body 31. The space between the air filter 32 and the body 31 is an installation space 4. The electronic injection valve 1 is arranged at the installation space 4, and both sides of the electronic injection valve 1 are respectively communicated with the air filter 32 and the body 31. The fresh air entering the generator can be first filtered by the air filter 32 to reduce the impurities entering the engine 3, thereby reducing the possibility of damage to the engine 3. The air filter 32 includes a housing 5 and an installation frame 6 arranged in the housing 5. The housing 5 is divided into front and rear parts connected by bolts, so as to realize the detachable housing 5. A filter sponge is arranged in the installation frame 6. The filter sponge is not shown in the attached drawings of the embodiments of the present application and can be installed according to the actual situation. The filtering part has a simple structure, is convenient to install, and the housing 5 can be disassembled for replacing the filter sponge, improving the long-term filtering effect.

[0036] Referring to Figure 3 , a heat dissipation frame 7 is arranged at the bottom of the body 31. A plurality of heat dissipation ribs 8 are fixedly connected in the heat dissipation frame 7. The plurality of heat dissipation ribs 8 are arranged at intervals to form a plurality of heat dissipation channels. The heat dissipation channels are communicated with the inside of the body 31. The plurality of heat dissipation ribs 8 are arranged in an outward expansion manner from the middle of the installation frame 6 to both ends. The heat dissipation channels are helpful for the heat dissipation of the engine 3. At the same time, the plurality of heat dissipation ribs 8 are arranged in an outward expansion manner from the middle of the installation frame 6 to both ends, which can improve the heat dissipation effect.

[0037] The implementation principle of a gas-fuel automatic switching system in an embodiment of the present application is:

[0038] When the engine 3 is not started:

[0039] When no gaseous fuel is connected, the pressure sensor 21 does not detect pressure, and the electronic controller 12 executes the fuel combustion program; start the engine 3, a negative pressure is generated in the intake passage of the engine 3, fresh air enters through the air filter 32, gasoline fuel is ejected through the fuel nozzle 13 and mixed with air to enter the combustion chamber, and the engine 3 operates normally.

[0040] When gaseous fuel is connected, the pressure sensor 21 detects pressure and transmits a signal to the electronic controller 12. The electronic controller 12 executes the gas combustion program; start the engine 3, a negative pressure is generated in the intake passage, fresh air enters through the air filter 32, gaseous fuel is ejected through the gas control valve 2 and mixed with air to enter the combustion chamber, and the engine 3 operates normally.

[0041] When the engine 3 is started and running:

[0042] When the engine 3 operates using gaseous fuel, the electronic controller 12 executes the gas combustion program; when the gaseous fuel is suddenly used up or interrupted and the pressure sensor 21 detects that the fuel pressure value is less than the set pressure value, the electronic controller 12 quickly makes a judgment and executes the fuel combustion program. The gas control valve 2 stops working, and fuel fuel is ejected through the fuel nozzle 13 and mixed with air to enter the combustion chamber, and the engine 3 operates normally.

[0043] When the engine 3 operates using fuel fuel, the electronic controller 12 executes the fuel combustion program; when gaseous fuel is suddenly connected and the pressure sensor 21 detects that the gas pressure is greater than the set value, the electronic controller 12 quickly makes a judgment and executes the gas combustion program. The fuel nozzle 13 stops working, and gaseous fuel is ejected through the gas control valve 2 and mixed with air to enter the combustion chamber, and the engine 3 operates normally.

[0044] The entire gas-fuel switching system does not require manual control and realizes automatic switching, which helps to improve the intelligence and convenience of gas and fuel switching. And through the control of the electronic controller 12, the combustion program and the actuating components accurately execute their respective instructions, enabling the engine 3 to achieve a better combustion state, with better performance, and being more economical and environmentally friendly.

[0045] The above are all preferred embodiments of this application, and do not limit the protection scope of this application accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of this application should be covered within the protection scope of this application.

Claims

1. A gas-fuel automatic switching system, characterized in that: It includes an electronic fuel injection valve (1), a gas control valve (2) and an engine (3); The electronic fuel injection valve (1) is installed on the engine (3). The electronic fuel injection valve (1) includes a valve body (11), an electronic controller (12) and a fuel nozzle (13). The electronic controller (12) and the fuel nozzle (13) are arranged on the valve body (11), and the fuel nozzle (13) is used to supply fuel to the engine (3); The gas control valve (2) is connected to the engine (3) through a pipeline for supplying gas to the engine (3). A pressure sensor (21) is arranged on the gas control valve (2). The pressure sensor (21) is electrically connected to the electronic controller (12). The pressure sensor (21) is used to detect the gas pressure and transmit the gas pressure signal to the electronic controller (12). The electronic controller (12) is used to automatically control the opening and closing of the gas control valve (2) and the electronic fuel injection valve (1) according to the gas pressure signal.

2. The automatic gas-fuel switching system according to claim 1, characterized in that: It further includes a fuel switch, the fuel switch includes an LPG gear and a CNG gear, and the fuel switch is electrically connected to the gas control valve (2) for controlling the type of gas introduced.

3. A gas-fuel automatic switching system according to claim 1 or 2, characterized in that: The engine (3) includes a body (31) and an air filter (32) arranged on the body (31). The space between the air filter (32) and the body (31) is an installation space (4). The electronic fuel injection valve (1) is arranged at the installation space (4), and both sides of the electronic fuel injection valve (1) are communicated with the air filter (32) and the body (31) respectively.

4. The gas-oil automatic switching system according to claim 3, characterized in that: The air filter (32) includes a detachable housing (5) and an installation frame (6) arranged in the housing (5). A filter sponge is arranged in the installation frame (6).

5. The gas-oil automatic switching system according to claim 3, characterized in that: A heat dissipation frame (7) is arranged at the bottom of the body (31). A plurality of heat dissipation ribs (8) are fixedly connected in the heat dissipation frame (7). The plurality of heat dissipation ribs (8) are arranged at intervals to form a plurality of heat dissipation channels, and the heat dissipation channels are communicated with the inside of the body (31).

6. The gas-oil automatic switching system according to claim 5, characterized in that: The plurality of heat dissipation ribs (8) are arranged in an outwardly expanding manner from the middle of the installation frame (6) to both ends.

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