Multi-fuel electromagnetic valve and fuel gas control system

Abstract

The utility model relates to the technical field of electromagnetic valves, in particular to a multi-fuel electromagnetic valve and a fuel gas control system. In the first aspect, the multi-fuel electromagnetic valve comprises an electromagnetic valve body, an electromagnetic valve I, an electromagnetic valve II, an air inlet pipe and an air outlet pipe, and a first channel, a second channel, a first vertical pipe and a second vertical pipe are arranged in the electromagnetic valve body; the air inlet pipe is communicated with the middle of the first channel and the middle of the second channel, the distance between the air inlet pipe and the first vertical pipe is equal to that between the air inlet pipe and the second vertical pipe, and the distance between the air outlet pipe and the first vertical pipe is equal to that between the air outlet pipe and the second vertical pipe. Secondly, the gas control system comprises a natural gas pipeline, a CNG cylinder, an LPG cylinder, a first-stage pressure reducing valve I, a first-stage pressure reducing valve II, a general gasoline engine and the multi-fuel electromagnetic valve; the method has the advantages that the consistency of gas emission and performance is improved, the strict emission requirement is met, the combustion quality is better controlled, emission of harmful substances is reduced, and the fuel economy is improved.

Description

Technical Field

[0001] The present application relates to the technical field of solenoid valves, and in particular to a multi-fuel solenoid valve and a gas control system. Background Art

[0002] With the increasing widespread use of three fuels (gasoline, LPG, NG) in general gasoline engine products (hereinafter referred to as "general engines"), gaseous fuels are more economical and environmentally friendly than gasoline. The gas fuel control systems currently used in general engines are mainly divided into carburetor self-priming solenoid valve structures, electronic fuel injection gas stepping motors, and electronic fuel injection gas solenoid valve structures; the electronic fuel injection system can better control the ratio of fuel and air, and self-correct according to the environment, load, etc., which is more environmentally friendly and energy-saving. However, the current electronic fuel injection gas solenoid valve structures are diverse. Through experimental tests and verifications, the structure, shape, and length of the gas passage will all affect the combustion quality, resulting in phenomena such as excessive emissions and insufficient performance. Summary of the Utility Model

[0003] In order to improve the consistency of gas emissions and performance, meet strict emission requirements, better control the combustion quality, reduce the emissions of harmful substances, and improve fuel economy, the present application provides a multi-fuel solenoid valve and a gas control system.

[0004] In a first aspect, the present application provides a multi-fuel solenoid valve, including a solenoid valve body, solenoid valve Ⅰ, solenoid valve Ⅱ, an intake pipe, and an exhaust pipe. The solenoid valve Ⅰ and solenoid valve Ⅱ are arranged in parallel on the top of the solenoid valve body. The intake pipe is arranged on the side of the solenoid valve body, and the exhaust pipe is arranged at the bottom of the solenoid valve body;

[0005] A first channel, a second channel, a first vertical pipe, and a second vertical pipe are arranged in a cross shape inside the solenoid valve body. The bottom end of the first vertical pipe passes through the second channel and is connected to the second channel. The top end of the first vertical pipe passes through the first channel and is blocked or opened by the solenoid valve Ⅰ;

[0006] The bottom end of the second vertical pipe passes through the second channel and is connected to the second channel. The top end of the second vertical pipe passes through the first channel and is blocked or opened by the solenoid valve Ⅱ;

[0007] The intake pipe is connected to the middle of the first channel and the second channel. The distances from the intake pipe to the first vertical pipe and the second vertical pipe are equal, and the distances from the exhaust pipe to the first vertical pipe and the second vertical pipe are also equal.

[0008] By adopting the above technical solutions, the technical parameters of the solenoid valve Ⅰ and solenoid valve Ⅱ assembled on the solenoid valve body can be the same product, and the interfaces can be interchanged when connecting the wiring harness. In the present application, two solenoid valves, namely solenoid valve Ⅰ and solenoid valve Ⅱ, are assembled, and the paths through which the gas passes inside the solenoid valve body are the same.

[0009] When using LPG as fuel, any one of the solenoid valves works. Select the solenoid valve according to the wiring situation. The gas enters through the intake pipe. The electronic fuel injection system used in conjunction with the solenoid valves of the present application controls the pulse width of the opening of solenoid valve I and solenoid valve II to control the intake volume of the gas to match different loads, and then enters the connecting intake port for combustion through the outlet pipe; regardless of whether solenoid valve I or solenoid valve II is selected, the gas path is the same;

[0010] When using CNG as fuel, solenoid valve I and solenoid valve II work simultaneously. The gas enters through the intake pipe. The electronic fuel injection system used in conjunction with the solenoid valves of the present application controls the pulse width of the opening of solenoid valve I and solenoid valve II to control the intake volume of the gas to match different loads, and then enters the connecting intake port for combustion through the outlet pipe; the route of the gas passing through solenoid valve I and solenoid valve II is the same, with better uniformity, ensuring the consistency of emissions and performance.

[0011] Moreover, the design of one gas outlet makes the gas pipeline of the whole machine more concise and the structure simpler. At the same time, the number of gas pipeline joints is reduced, directly reducing the risk of joint air leakage and having higher safety.

[0012] By newly designing the structure of the gas solenoid valve, the uniform and symmetrical structural design of the intake pipe, solenoid valve I, solenoid valve II, and outlet pipe makes the gas path of each fuel and each pipeline the same, which can improve the consistency of gas emissions and performance, meet strict emission requirements, better control the combustion quality, reduce the emission of harmful substances, and improve fuel economy.

[0013] Optionally, it further includes a pressure sensor, and the pressure sensor is communicated with the end of the first channel.

[0014] By adopting the above technical solution, the pressure sensor can sense the pressure of the gas in the pipeline, and thus be electrically connected and cooperate with the electronic fuel injection system to control the pulse width of the opening of solenoid valve I and solenoid valve II according to the actual pressure value.

[0015] Optionally, two connecting pipes are vertically communicated on each of the first channel and the second channel, and the first vertical pipe and the second vertical pipe are respectively arranged in the corresponding connecting pipes; plugs are arranged at the end of the first channel, the end of the second channel, and the bottom of the connecting pipe on the second channel.

[0016] By adopting the above technical solution, the arrangement of the connecting pipes facilitates the installation of the first vertical pipe and the second vertical pipe, and at the same time, the plugs can reduce the risk of air leakage.

[0017] Optionally, a first mounting hole and a second mounting hole are formed in the top surface of the solenoid valve body. The first mounting hole communicates with the top of the first vertical pipe, and the second mounting hole communicates with the top of the second vertical pipe. The solenoid valve I is threadedly connected to the first mounting hole, and the solenoid valve II is threadedly connected to the second mounting hole.

[0018] By adopting the above technical solution, it is convenient to install the solenoid valve I and the solenoid valve II.

[0019] Optionally, sealing rings are arranged in the openings of the first mounting hole and the second mounting hole.

[0020] By adopting the above technical solution, it helps to improve the sealing performance at the installation positions of the solenoid valve I and the solenoid valve II and reduce the risk of air leakage.

[0021] Optionally, a third mounting hole is formed in the side surface of the solenoid valve body. The third mounting hole communicates with the end of the first channel, and the pressure sensor passes through the third mounting hole and then communicates with the end of the first channel.

[0022] Optionally, a sealing ring is arranged in the opening of the third mounting hole.

[0023] By adopting the above technical solution, it helps to improve the sealing performance at the installation position of the pressure sensor and reduce the risk of air leakage.

[0024] In a second aspect, the present application provides a gas control system, including a natural gas pipeline, a CNG gas cylinder, an LPG gas cylinder, a first-stage pressure reducing valve I, a first-stage pressure reducing valve II, a general-purpose engine, and the above-mentioned multi-fuel solenoid valve;

[0025] The CNG gas cylinder and the LPG gas cylinder are respectively connected to the first-stage pressure reducing valve II through different pipelines. The first-stage pressure reducing valve I is arranged on the pipeline connecting the CNG gas cylinder and the first-stage pressure reducing valve II. The first-stage pressure reducing valve II and the natural gas pipeline converge through pipelines and then are connected to the intake pipe;

[0026] The control part of the multi-fuel solenoid valve is connected to the general-purpose engine through an ECU, and the outlet pipe is connected to the general-purpose engine through a pipeline.

[0027] Through the above technical solution, the multi-fuel solenoid valve of the present application can be applied to the general-purpose engine for actual use.

[0028] In summary, the present application includes at least one of the following beneficial technical effects:

[0029] 1. By newly designing the structure of the gas solenoid valve, the uniform and symmetrical structural design of the intake pipe, solenoid valve I, solenoid valve II, and outlet pipe enables the gas path of each fuel and each pipeline to be the same, which can improve the consistency of gas emissions and performance, meet stringent emission requirements, better control the combustion quality, reduce the emissions of harmful substances, and improve fuel economy;

[0030] 2. The design of one outlet makes the gas pipeline of the whole machine more concise and the structure simpler. At the same time, it reduces the gas pipeline joints, directly reducing the risk of joint air leakage and having higher safety. Description of the Drawings

[0031] Figure 1 It is a schematic diagram of the overall structure of a multi-fuel solenoid valve according to an embodiment of the present application.

[0032] Figure 2 It is a schematic diagram showing the internal structure of the multi-fuel solenoid valve in an embodiment of the present application.

[0033] Figure 3 It is a schematic diagram of the structure of a gas control system according to an embodiment of the present application.

[0034] Description of the reference numerals: 1, solenoid valve I; 2, pressure sensor; 3, solenoid valve body; 31, first channel; 32, second channel; 33, first vertical pipe; 34, second vertical pipe; 35, first mounting hole; 36, second mounting hole; 37, third mounting hole; 4, outlet pipe; 5, intake pipe; 6, solenoid valve II; 7, connecting pipe; 8, sealing ring; 9, natural gas pipeline; 91, CNG gas cylinder; 92, LPG gas cylinder; 93, first-stage pressure reducer I; 94, first-stage pressure reducer II; 95, general-purpose engine. Detailed Description of the Embodiment

[0035] The following further describes the present application in detail with reference to the Figures 1-3 drawings.

[0036] In the first aspect, an embodiment of the present application discloses a multi-fuel solenoid valve. Referring to Figures 1-2 , a multi-fuel solenoid valve includes a solenoid valve body (3), a solenoid valve I (1), a solenoid valve II (6), a pressure sensor (2), an intake pipe (5), and an outlet pipe (4). The solenoid valve I (1) and the solenoid valve II (6) are arranged in parallel on the top of the solenoid valve body (3), the pressure sensor (2) and the intake pipe (5) are arranged on the side surface of the solenoid valve body (3), and the outlet pipe (4) is arranged at the bottom of the solenoid valve body (3);

[0037] Inside the solenoid valve body (3), a first channel (31), a second channel (32), a first vertical pipe (33) and a second vertical pipe (34) are arranged in a cross shape. The bottom end of the first vertical pipe (33) passes through the second channel (32) and communicates with the second channel (32). The top end of the first vertical pipe (33) passes through the first channel (31) and is blocked or opened by the solenoid valve Ⅰ (1); the bottom end of the second vertical pipe (34) passes through the second channel (32) and communicates with the second channel (32). The top end of the second vertical pipe (34) passes through the first channel (31) and is blocked or opened by the solenoid valve Ⅱ (6); the pistons at the bottoms of the solenoid valve Ⅰ (1) and the solenoid valve Ⅱ (6) can rise or fall, so as to block or open the top ends of the first vertical pipe (33) and the second vertical pipe (34). Gas enters the first channel (31) from the intake pipe (5). When the piston at the bottom of the solenoid valve Ⅰ (1) rises, the gas flows upward and enters the first vertical pipe (33); the same is true for the gas entering the second vertical pipe (34).

[0038] The intake pipe (5) communicates with the middle of the first channel (31), the intake pipe (5) communicates with the middle of the second channel (32). The distances from the intake pipe (5) to the first vertical pipe (33) and the second vertical pipe (34) are equal, and the distances from the outlet pipe (4) to the first vertical pipe (33) and the second vertical pipe (34) are also equal.

[0039] The technical parameters of the solenoid valve Ⅰ (1) and the solenoid valve Ⅱ (6) assembled on the solenoid valve body (3) can be the same product, and the interfaces can be interchanged when connecting the wire harness. In this application, two solenoid valves are assembled, namely the solenoid valve Ⅰ (1) and the solenoid valve Ⅱ (6), and the paths through which the gas passes inside the solenoid valve body (3) are the same.

[0040] When using LPG as fuel, any one of the solenoid valves works. Select the solenoid valve according to the wiring situation. The gas enters through the intake pipe (5). The electronic fuel injection system used in conjunction with the solenoid valves in this application controls the pulse width of the solenoid valve Ⅰ (1) and the solenoid valve Ⅱ (6) to open, so as to control the intake volume of the gas to match different loads, and then enters the connecting intake port for combustion through the outlet pipe (4); whether the solenoid valve Ⅰ (1) or the solenoid valve Ⅱ (6) is selected, the path of the gas is the same;

[0041] When using NG as fuel, the solenoid valve Ⅰ (1) and the solenoid valve Ⅱ (6) work simultaneously. The gas enters through the intake pipe (5). The electronic fuel injection system used in conjunction with the solenoid valves in this application controls the pulse width of the solenoid valve Ⅰ (1) and the solenoid valve Ⅱ (6) to open, so as to control the intake volume of the gas to match different loads, and then enters the connecting intake port for combustion through the outlet pipe (4); the routes of the gas passing through the solenoid valve Ⅰ (1) and the solenoid valve Ⅱ (6) are the same, and the uniformity is better, ensuring the consistency of emissions and performance.

[0042] Moreover, the design of an air outlet makes the gas pipeline of the whole machine more concise and the structure simpler. At the same time, the number of gas pipeline joints is reduced, directly reducing the risk of joint air leakage and having higher safety.

[0043] By newly designing the structure of the gas solenoid valve and the uniform and symmetric structural design of the intake pipe (5), solenoid valve I (1), solenoid valve II (6) and outlet pipe (4), the gas path of each fuel and each pipeline is the same, which can improve the consistency of gas emission and performance, meet strict emission requirements, better control the combustion quality, reduce the emission of harmful substances and improve fuel economy.

[0044] Refer to Figures 1-2 , the pressure sensor (2) is communicated with the end of the first channel (31). The pressure sensor (2) can sense the gas pressure in the pipeline, thus being electrically connected and cooperating with the electronic injection system to control the pulse width of the opening of solenoid valve I (1) and solenoid valve II (6) according to the actual pressure value. Two connecting pipes (7) are vertically communicated with each of the first channel (31) and the second channel (32). The first vertical pipe (33) and the second vertical pipe (34) are respectively arranged in the corresponding connecting pipes (7); plugs are arranged at the end of the first channel (31), the end of the second channel (32) and the bottom of the connecting pipe (7) on the second channel (32). The arrangement of the connecting pipes (7) facilitates the installation of the first vertical pipe (33) and the second vertical pipe (34), and at the same time, the plugs can reduce the risk of air leakage.

[0045] Refer to Figures 1-2 , a first mounting hole (35) and a second mounting hole (36) are opened on the top surface of the solenoid valve body (3). The first mounting hole (35) is communicated with the top of the first vertical pipe (33), and the second mounting hole (36) is communicated with the top of the second vertical pipe (34). Solenoid valve I (1) is threadedly connected in the first mounting hole (35), and solenoid valve II (6) is threadedly connected in the second mounting hole (36), which is convenient for the installation of solenoid valve I (1) and solenoid valve II (6). Sealing rings (8) are arranged in the openings of the first mounting hole (35) and the second mounting hole (36), which helps to improve the sealing performance at the installation positions of solenoid valve I (1) and solenoid valve II (6) and reduce the risk of air leakage. A third mounting hole (37) is opened on the side surface of the solenoid valve body (3). The third mounting hole (37) is communicated with the end of the first channel (31). The pressure sensor (2) passes through the third mounting hole (37) and is communicated with the end of the first channel (31). A sealing ring (8) is arranged in the opening of the third mounting hole (37), which helps to improve the sealing performance at the installation position of the pressure sensor (2) and reduce the risk of air leakage.

[0046] In the second aspect, refer to Figure 3, this application discloses a gas control system, including a natural gas pipeline 9, a CNG cylinder 91, an LPG cylinder 92, a first-stage pressure reducing valve I 93, a first-stage pressure reducing valve II 94, a general-purpose engine 95 and the above-mentioned multi-fuel solenoid valve. The CNG cylinder 91 and the LPG cylinder 92 are respectively connected to the first-stage pressure reducing valve II 94 through different pipelines. The first-stage pressure reducing valve I 93 is arranged on the pipeline connecting the CNG cylinder 91 and the first-stage pressure reducing valve II 94. The first-stage pressure reducing valve II 94 and the natural gas pipeline 9 are converged through pipelines and then connected to the intake pipe 5; the control part of the multi-fuel solenoid valve is connected to the general-purpose engine 95 through the ECU, and the outlet pipe 4 is connected to the general-purpose engine 95 through a pipeline to apply the multi-fuel solenoid valve of this application to the general-purpose engine 95 for actual use.

[0047] The above are all the preferred embodiments of this application, and the protection scope of this application is not limited thereby. Therefore, all equivalent changes made according to the structure, shape and principle of this application shall be covered within the protection scope of this application.

Claims

1. A multi-fuel solenoid valve, characterized in that: It includes a solenoid valve body (3), solenoid valve I (1), solenoid valve II (6), an intake pipe (5) and an exhaust pipe (4). The solenoid valve I (1) and solenoid valve II (6) are arranged in parallel on the top of the solenoid valve body (3). The intake pipe (5) is arranged on the side of the solenoid valve body (3), and the exhaust pipe (4) is arranged at the bottom of the solenoid valve body (3). Inside the solenoid valve body (3), a first channel (31), a second channel (32), a first vertical pipe (33) and a second vertical pipe (34) are arranged in a cross shape. The bottom end of the first vertical pipe (33) passes through the second channel (32) and communicates with the second channel (32). The top end of the first vertical pipe (33) passes through the first channel (31) and is blocked or opened by the solenoid valve I (1). The bottom end of the second vertical pipe (34) passes through the second channel (32) and communicates with the second channel (32). The top end of the second vertical pipe (34) passes through the first channel (31) and is blocked or opened by the solenoid valve II (6). The intake pipe (5) communicates with the middle of the first channel (31) and also communicates with the middle of the second channel (32). The distances from the intake pipe (5) to the first vertical pipe (33) and the second vertical pipe (34) are equal, and the distances from the exhaust pipe (4) to the first vertical pipe (33) and the second vertical pipe (34) are also equal.

2. The multi-fuel solenoid valve according to claim 1, wherein: It further includes a pressure sensor (2), and the pressure sensor (2) communicates with the end of the first channel (31).

3. A multi-fuel solenoid valve according to claim 1, characterized in that: On each of the first channel (31) and the second channel (32), two connecting pipes (7) are vertically communicated. The first vertical pipe (33) and the second vertical pipe (34) are respectively inserted into the corresponding connecting pipes (7). Plugs are provided at the end of the first channel (31), the end of the second channel (32), and the bottom of the connecting pipe (7) on the second channel (32).

4. A multi-fuel solenoid valve according to claim 1, characterized in that: On the top surface of the solenoid valve body (3), a first mounting hole (35) and a second mounting hole (36) are opened. The first mounting hole (35) communicates with the top of the first vertical pipe (33), and the second mounting hole (36) communicates with the top of the second vertical pipe (34). The solenoid valve I (1) is threadedly connected into the first mounting hole (35), and the solenoid valve II (6) is threadedly connected into the second mounting hole (36).

5. The multi-fuel solenoid valve according to claim 4, wherein: Sealing rings (8) are provided inside the openings of the first mounting hole (35) and the second mounting hole (36).

6. A multi-fuel solenoid valve according to claim 2, characterized in that: On the side of the solenoid valve body (3), a third mounting hole (37) is opened. The third mounting hole (37) communicates with the end of the first channel (31), and the pressure sensor (2) passes through the third mounting hole (37) and then communicates with the end of the first channel (31).

7. A multi-fuel solenoid valve according to claim 6, characterized in that: A sealing ring (8) is provided inside the opening of the third mounting hole (37).

8. A gas control system, characterized in that: It includes a natural gas pipeline (9), a CNG gas cylinder (91), an LPG gas cylinder (92), a first-stage pressure reducer I (93), a first-stage pressure reducer II (94), a general-purpose engine (95) and the multi-fuel solenoid valve according to any one of claims 1-7. The CNG cylinder (91) and the LPG cylinder (92) are respectively connected to the first-stage pressure reducer II (94) through different pipelines. The first-stage pressure reducer I (93) is arranged on the pipeline connecting the CNG cylinder (91) and the first-stage pressure reducer II (94). The first-stage pressure reducer II (94) and the natural gas pipeline (9) are converged through pipelines and then connected to the intake pipe (5). The control part of the multi-fuel solenoid valve is connected to the general-purpose engine (95) through the ECU, and the outlet pipe (4) is connected to the general-purpose engine (95) through a pipeline.

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