Multi-fuel generator set control system

Abstract

The utility model relates to a multi-fuel generator set control system which comprises a fuel gas source, a first electromagnetic valve and a carburetor which are sequentially communicated through a fuel gas pipeline. The engine and the generator are connected with each other; the outlet end of the carburetor is communicated with an air inlet channel of the engine; the first electromagnetic valve is electrically connected with the control module; the control module can control opening and closing of the first electromagnetic valve; compared with the prior art, a two-stage pressure reducing valve structure is omitted, the control module is used for collecting the data of the generator set and calculating the gas flow required by the engine, and the control module is used for controlling the first electromagnetic valve to adjust the flow of the gas flowing out of the first electromagnetic valve according to the data of the generator set. The gas flow is actively adjusted through the first electromagnetic valve, flow control is accurate, and the engine performance is good.

Description

Technical Field

[0001] This utility model relates to the field of multi-fuel generator set technology, and specifically to a multi-fuel generator set control system. Background Technology

[0002] Multi-fuel (gasoline, LPG, NG, etc.) universal generator sets can switch fuels as needed and are increasingly widely used in production. Existing multi-fuel generator set control systems include fuel lines and gas lines. The fuel line consists of a fuel tank, a solenoid valve, and a carburetor connected in sequence. The gas line consists of a gas source, a primary pressure reducing valve, a gas shut-off valve, a secondary pressure reducing valve, and a carburetor connected in sequence. The carburetor is connected to the engine intake manifold. In existing technology, when using natural gas, the power module controls the solenoid valve to close and the gas shut-off valve to open. Natural gas passes through the primary and gas shut-off valves and enters the secondary pressure reducing valve. When the engine starts, a negative pressure is generated in the intake manifold, overcoming the spring tension of the mechanical switch in the secondary pressure reducing valve. Natural gas flows out of the secondary pressure reducing valve, passes through the carburetor, and enters the intake manifold. The engine generates different levels of negative pressure under different operating conditions, causing different opening degrees of the mechanical switch, thereby achieving passive control of the gas flow through the secondary pressure reducing valve. The existing structure has complex piping for the gas shut-off valve and the secondary pressure reducing valve, occupying a large space. Furthermore, the passive control of gas flow using the mechanical switch in the secondary pressure reducing valve results in poor consistency of the mechanical switch and poor flow control accuracy, affecting engine performance. Utility Model Content

[0003] The purpose of this invention is to address the problem in existing multi-fuel generator set control systems that use a passive method of controlling gas flow through a mechanical switch in a two-stage pressure reducing valve, which results in poor consistency of the mechanical switch, poor flow control accuracy, and negative impacts on engine performance. This invention aims to provide a multi-fuel control system.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0005] A multi-fuel generator set control system includes a gas source, a first solenoid valve, and a carburetor connected sequentially via a gas pipeline; it also includes a control module, and an engine and a generator connected thereto; the outlet end of the carburetor is connected to the intake manifold of the engine; the first solenoid valve and the control module are electrically connected; the control module can control the opening and closing of the first solenoid valve; the control module can also collect generator set data and control the first solenoid valve to adjust the gas flow rate out of the first solenoid valve based on the generator set data.

[0006] The present invention, employing the aforementioned technical solution, eliminates the gas shut-off valve and secondary pressure reducing valve in the prior art, replacing them with a first solenoid valve. The opening and closing of the first solenoid valve, controlled by the control module, controls the on / off of the gas supply path. Furthermore, when using natural gas as fuel, the control module calculates the required gas flow rate under the current engine operating conditions based on collected generator set data and controls the first solenoid valve to adjust the gas flow rate, ensuring normal engine operation under various conditions. Compared to the existing multi-fuel generator set control systems, which passively control gas flow rate using a mechanical switch in the secondary pressure reducing valve (resulting in poor consistency and flow control accuracy, impacting engine performance), the present invention eliminates the secondary pressure reducing valve structure. Instead, it collects generator set data and calculates the required gas flow rate, actively adjusting the gas flow rate through the first solenoid valve, resulting in precise flow control and superior engine performance.

[0007] Furthermore, it also includes a fuel source and a fuel switch; the fuel source, fuel switch, and carburetor are connected in sequence via fuel pipelines.

[0008] Furthermore, the generator set data includes the gas intake pressure of the first solenoid valve, the engine speed and cylinder head temperature, and the generator power and current.

[0009] Furthermore, it also includes several sensors electrically connected to the control module, through which the control module collects generator set data; the sensors include a pressure sensor for collecting the gas intake pressure, a trigger or igniter for collecting the rotational speed, a temperature sensor for collecting the cylinder head temperature, an inverter for collecting the power, and a power resistor or transformer for collecting the current.

[0010] Furthermore, the fuel switch is a second solenoid valve; the control module is electrically connected to the second solenoid valve, and the control module can control the opening and closing of the second solenoid valve; when using fuel, the control module controls the first solenoid valve to close and the second solenoid valve to open; when using natural gas, the control module controls the first solenoid valve to open and the second solenoid valve to close.

[0011] Furthermore, it also includes a fuel selection switch electrically connected to the control module, the fuel selection switch having a fuel position and at least one gas position; when the fuel selection switch is in any position, the control module executes a corresponding control program to control the first solenoid valve and the second solenoid valve.

[0012] Furthermore, the fuel switch is a mechanical fuel switch; it also includes a fuel selection switch mechanically connected to the mechanical fuel switch, the fuel selection switch being able to control the opening and closing of the mechanical fuel switch; the fuel selection switch or the mechanical fuel switch is electrically connected to the control module; the fuel selection switch includes a fuel position and at least one gas position; when the fuel selection switch is in any position, the control module executes a corresponding control program to control the first solenoid valve.

[0013] Furthermore, the gas source is a container filled with liquefied petroleum gas or natural gas.

[0014] Furthermore, a pressure reducing valve is connected to the gas pipeline between the gas source and the first solenoid valve; the gas pressure of the gas source is usually high, and the pressure can be reduced by the pressure reducing valve.

[0015] Compared with the prior art, the advantages of this utility model are: eliminating the two-stage pressure reducing valve structure, collecting generator set data and calculating the required gas flow of the engine through the control module, and actively adjusting the gas flow through the first solenoid valve, resulting in precise flow control and better engine performance. Attached Figure Description

[0016] Figure 1 This is a system diagram of Embodiment 1 of the present invention;

[0017] Figure 2 This is a system diagram of Embodiment 2 of the present invention;

[0018] Figure 3 This is a system diagram of Embodiment 3 of the present invention.

[0019] The markings in the diagram are: 1-gas source, 2-first solenoid valve, 3-carburetor, 4-control module, 5-engine, 6-generator, 7-fuel source, 8-second solenoid valve, 9-sensor, 10-pressure reducing valve, 11-fuel selection switch, 12-mechanical fuel switch. Detailed Implementation

[0020] The present invention will now be described in detail with reference to the accompanying drawings.

[0021] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this utility model and are not intended to limit this utility model.

[0022] This embodiment provides a multi-fuel generator set control system, including a gas source 1, a first solenoid valve 2, and a carburetor 3 connected sequentially via a gas pipeline; it also includes a control module 4, and an engine 5 and a generator 6 connected thereto; the outlet end of the carburetor 3 is connected to the intake manifold of the engine 5; the first solenoid valve 2 and the control module 4 are electrically connected; the control module 4 can control the opening and closing of the first solenoid valve 2; the control module 4 can also collect generator set data and control the first solenoid valve 2 to adjust the gas flow rate out of the first solenoid valve 2 based on the generator set data; the gas source 1 is a container filled with liquefied petroleum gas or natural gas, usually a gas cylinder; specifically, the control module 4 collects generator set data, calculates the gas flow rate required by the engine 5 based on the data, and controls the first solenoid valve 2 to adjust the gas flow rate;

[0023] It also includes a fuel source 7 and a fuel switch; the fuel source 7, the fuel switch and the carburetor 3 are connected in sequence through fuel pipelines; the fuel source 7 is a gasoline tank.

[0024] The generator set data includes the gas intake pressure of the first solenoid valve 2, the speed and cylinder head temperature of the engine 5, and the power and current of the generator 6. It should be noted that the generator set data is not limited to the above data, as long as it can be used by the control module 4 to calculate the gas flow required by the engine 6.

[0025] It also includes several sensors 9 electrically connected to the control module 4. The control module 4 collects generator set data through the sensors 9. The sensors 9 include a pressure sensor for collecting the gas intake pressure, a trigger or igniter for collecting the speed, a temperature sensor for collecting the cylinder head temperature, an inverter for collecting the power, and a power resistor or transformer for collecting the current.

[0026] Gas source 1 is a container filled with liquefied petroleum gas or natural gas; the type of gas source is not limited, but only one type of gas can be connected at a time;

[0027] A pressure reducing valve 10 is connected to the gas pipeline between the gas source 1 and the first solenoid valve 2.

[0028] Example 1, such as Figure 1 As shown, the fuel selection switch is the second solenoid valve 8; the control module 4 is electrically connected to the second solenoid valve 8, and the control module 4 can control the opening and closing of the second solenoid valve 8; it also includes a fuel selection switch 11 electrically connected to the control module 4, the fuel selection switch 11 includes a fuel position and at least one gas position; when the fuel selection switch 11 is in any position, the control module 4 executes the corresponding control program to control the first solenoid valve 2 and the second solenoid valve 8;

[0029] Specifically, in this embodiment, the fuel selection switch 11 includes fuel oil, liquefied petroleum gas (LPG), and natural gas positions. When fuel oil is needed, the operator turns the fuel selection switch 11 to the fuel oil position. The control module 4 receives the signal and executes program A, controlling the first solenoid valve 2 to close and the second solenoid valve 8 to open. When LPG is needed, the operator manually connects the LPG cylinder to the pressure reducing valve 10, then turns the fuel selection switch 11 to the LPG position. The control module 4 receives the signal and executes program B, controlling the first solenoid valve 2 to open and the second solenoid valve 8 to close. Simultaneously, the generator set data is collected through the aforementioned sensor 9, and the first solenoid valve 2 is controlled to adjust the gas flow rate. When natural gas is needed, the operator manually connects the natural gas cylinder to the pressure reducing valve 10, then turns the fuel selection switch 11 to the natural gas position. The control module 4 receives the signal and executes program C, controlling the first solenoid valve 2 to open and the second solenoid valve 8 to close. Simultaneously, the generator set data is collected through the aforementioned sensor 9, and the first solenoid valve 2 is controlled to adjust the gas flow rate.

[0030] Example 2, as Figure 2 As shown, the fuel selection switch is a mechanical fuel switch 12; it also includes a fuel selection switch 11 mechanically connected to the mechanical fuel switch 12, which can control the opening and closing of the mechanical fuel switch 12; the fuel selection switch 11 is electrically connected to the control module 4; the fuel selection switch 11 includes a fuel position and at least one gas position; when the fuel selection switch 11 is in any position, the control module 4 executes the corresponding control program to control the first solenoid valve 2;

[0031] Specifically, in this embodiment, the fuel selection switch 11 includes a fuel oil position, a liquefied petroleum gas (LPG) position, and a natural gas position. When fuel oil is needed, the operator turns the fuel selection switch 11 to the fuel oil position, which opens the mechanical fuel switch 12. The control module 4 receives the signal from the fuel selection switch 11 and executes program A to close the first solenoid valve 2. When LPG is needed, the operator first manually connects the LPG cylinder to the pressure reducing valve 10, then turns the fuel selection switch 11 to the LPG position, which closes the mechanical fuel switch 12. The control module 4 receives the signal from the fuel selection switch 11 and executes program A to close the first solenoid valve 2. When the signal from the selector switch 11 is received, program B is executed, controlling the first solenoid valve 2 to open. At the same time, the generator set data is collected through the aforementioned sensor 9, and the first solenoid valve 2 is controlled to adjust the gas flow. When natural gas is needed, the operator first manually connects the natural gas cylinder to the pressure reducing valve 10, and then turns the fuel selector switch 11 to the natural gas position, which causes the mechanical fuel switch 12 to close. The control module 4 receives the signal from the fuel selector switch 11, executes program C, controls the first solenoid valve 2 to open, and at the same time, the generator set data is collected through the aforementioned sensor 9, and the first solenoid valve 2 is controlled to adjust the gas flow.

[0032] Example 3, as Figure 3 As shown, with Figure 2 The difference is that control module 4 is electrically connected to mechanical fuel switch 12. After fuel selection switch 11 controls the opening and closing of mechanical fuel switch 12, the signal received by control module 4 comes from mechanical fuel switch 12; all other connections are with the system. Figure 2 same.

[0033] It should be noted that the pressure sensor, trigger or igniter, temperature sensor, inverter, power resistor, and current transformer mentioned above are all existing components; the control principle of the control module 4 for the first solenoid valve 2 and the second solenoid valve 8 is also existing technology, and will not be described in detail here.

[0034] The present invention, employing the aforementioned technical solution, eliminates the gas shut-off valve and secondary pressure reducing valve in the prior art, replacing them with a first solenoid valve 2. The opening and closing of the first solenoid valve 2 is controlled by the control module 4, thereby controlling the gas supply path. Furthermore, when using natural gas as fuel, the control module 4 calculates the required gas flow rate under the current engine operating conditions based on collected generator set data and controls the first solenoid valve 2 to adjust the gas flow rate, ensuring the engine operates normally under all conditions. Compared to the prior art multi-fuel generator set control systems, which passively control gas flow rate using a mechanical switch in a secondary pressure reducing valve (resulting in poor consistency and flow control accuracy, impacting engine performance), the present invention eliminates the secondary pressure reducing valve structure. Instead, it collects generator set data and calculates the required gas flow rate for the engine, actively adjusting the gas flow rate through the first solenoid valve, resulting in precise flow control and superior engine performance.

[0035] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A multi-fuel generator set control system, characterized in that: It includes a gas source (1), a first solenoid valve (2) and a carburetor (3) connected in sequence through a gas pipeline; it also includes a control module (4), and an engine (5) and a generator (6) connected thereto; the outlet end of the carburetor (3) is connected to the intake of the engine (5); the first solenoid valve (2) and the control module (4) are electrically connected; the control module (4) can control the opening and closing of the first solenoid valve (2); the control module (4) can also collect generator set data and control the first solenoid valve (2) to adjust the gas flow rate out of the first solenoid valve (2) based on the generator set data.

2. The multi-fuel generator set control system according to claim 1, characterized in that: It also includes a fuel source (7) and a fuel switch; the fuel source (7), the fuel switch and the carburetor (3) are connected in sequence through a fuel pipeline.

3. The multi-fuel generator set control system according to claim 1 or 2, characterized in that: The generator set data includes the gas intake pressure of the first solenoid valve (2), the speed and cylinder head temperature of the engine (5), and the power and current of the generator (6).

4. The multi-fuel generator set control system according to claim 3, characterized in that: It also includes several sensors (9) electrically connected to the control module (4), and the control module (4) collects generator set data through the sensors (9); the sensors (9) include a pressure sensor for collecting the gas intake pressure, a trigger or igniter for collecting the speed, a temperature sensor for collecting the cylinder head temperature, an inverter for collecting the power, and a power resistor or transformer for collecting the current.

5. The multi-fuel generator set control system according to claim 2, characterized in that: The fuel switch is a second solenoid valve (8); the control module (4) is electrically connected to the second solenoid valve (8), and the control module (4) can control the opening and closing of the second solenoid valve (8).

6. The multi-fuel generator set control system according to claim 5, characterized in that: It also includes a fuel selection switch (11) electrically connected to the control module (4), the fuel selection switch (11) including a fuel position and at least one gas position; when the fuel selection switch (11) is in any position, the control module (4) executes a corresponding control program to control the first solenoid valve (2) and the second solenoid valve (8).

7. The multi-fuel generator set control system according to claim 2, characterized in that: The fuel switch is a mechanical fuel switch (12); it also includes a fuel selection switch (11) mechanically connected to the mechanical fuel switch (12), the fuel selection switch (11) can control the opening and closing of the mechanical fuel switch (12); the fuel selection switch (11) or the mechanical fuel switch (12) is electrically connected to the control module (4); the fuel selection switch (11) includes a fuel position and at least one gas position; when the fuel selection switch (11) is in any position, the control module (4) executes a corresponding control program to control the first solenoid valve (2).

8. The multi-fuel generator set control system according to claim 1 or 2, characterized in that: The gas source (1) is a container filled with liquefied petroleum gas or natural gas.

9. The multi-fuel generator set control system according to claim 1 or 2, characterized in that: A pressure reducing valve (10) is connected to the gas pipeline between the gas source (1) and the first solenoid valve (2).

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