Fuel gas inlet standing wave preventing structure and multi-fuel engine

Abstract

The utility model discloses a fuel gas inlet standing wave preventing structure and a multi-fuel engine, the fuel gas inlet standing wave preventing structure is arranged between a fuel gas inlet of a fuel gas inlet channel of a throttle valve of the engine and a gas outlet of a fuel gas pipeline, and the fuel gas inlet standing wave preventing structure comprises a bag body with a cavity; a first connecting port and a second connecting port are formed in the two axial ends of the bag body respectively, the bag body is communicated with a gas inlet of a gas inlet channel of the throttle valve through the first connecting port, the bag body is communicated with a gas outlet of a gas pipeline through the second connecting port, and the diameter of at least one part of a cavity of the bag body is larger than the inner diameter of the gas pipeline. Generation of standing waves in the fuel gas pipeline connected with the fuel gas inlet of the fuel gas inlet channel of the throttle valve can be well restrained, so that the flow speed of fuel gas in the fuel gas pipeline is effectively increased, the stability of fuel gas flowing is guaranteed, and under the condition that fuel gas is used as fuel, the performance of an engine can be effectively improved.

Description

Technical Field

[0001] The present application belongs to the field of engine technology, and in particular relates to a gas intake anti-standing wave structure and a multi-fuel engine. Background Art

[0002] At present, in order to expand the applicable scenarios of internal combustion engines, some multi-fuel engines have emerged that can use multiple fuels such as fuel oil (mainly gasoline, alcohol, etc.) and gas (mainly natural gas, LPG liquefied petroleum gas, biogas, etc.). Users can usually switch the corresponding fuel according to their needs by operating the fuel selection switch.

[0003] An air intake passage, a fuel delivery passage, a gas intake passage and a gas solenoid valve are usually provided on the throttle of a multi-fuel engine that can use liquid fuel and gas fuel. The fuel or gas is mixed with the air entering from the intake end of the air intake passage at the throat of the outlet end of the air intake passage inside the throttle and then enters the engine cylinder.

[0004] A gas pipeline is connected to the gas inlet of the gas intake passage. A gas solenoid valve is usually arranged at the gas inlet of the gas intake passage. The on-off connection between the gas pipeline and the gas intake passage is controlled by the gas solenoid valve, and the amount of gas entering the engine per unit time is controlled by controlling the switching duration of the gas solenoid valve.

[0005] However, the gas pipeline connected to the gas inlet of the existing gas intake channel is usually a straight pipe with a constant diameter. In the process of controlling the connection between the gas pipeline and the gas intake channel by the gas solenoid valve, the valve core of the gas solenoid valve will frequently move to drive the valve to frequently open and close the gas inlet of the gas intake channel, and the frequent opening and closing of the valve will form a reverse impact on the flow of gas in the gas pipeline, causing the gas to fluctuate in the opposite direction in the gas pipeline to form a standing wave, thereby affecting the flow rate of the gas in the gas pipeline and the stability of the gas flow. Utility Model Content

[0006] In view of the defects in the prior art, the purpose of the present application is to provide a gas intake anti-standing wave structure and a multi-fuel engine, which can effectively suppress the generation of standing waves in the gas pipeline connected to the gas inlet of the gas intake channel of the throttle, thereby effectively increasing the flow rate of the gas in the gas pipeline and ensuring the stability of the gas flow. When using gas as fuel, the engine performance can be effectively improved.

[0007] In order to achieve the above objectives, this application provides the following solutions:

[0008] According to a first aspect of the present application, the present application provides a gas intake standing wave prevention structure, which is arranged between the gas inlet of the gas intake passage of the throttle of the engine and the gas outlet of the gas pipeline, wherein:

[0009] The gas intake anti-standing wave structure includes a sac with a cavity, and a first connecting port and a second connecting port are respectively opened at two axial ends of the sac. The sac is connected with the gas inlet of the gas intake channel of the throttle through the first connecting port, and the sac is connected with the gas outlet of the gas pipeline through the second connecting port. The diameter of at least a portion of the cavity of the sac is larger than the inner diameter of the gas pipeline.

[0010] Preferably, the throttle valve comprises a throttle valve body, the gas intake passage is arranged in the throttle valve body, and the capsule is integrally formed with the throttle valve body.

[0011] Preferably, the bladder body and the gas pipeline are integrally formed.

[0012] Preferably, the first connection port of the capsule is detachably connected to the gas inlet of the gas inlet passage of the throttle valve, and the second connection port of the capsule is detachably connected to the gas outlet of the gas pipeline.

[0013] Preferably, the gas intake anti-standing wave structure further includes a first connecting pipe and a second connecting pipe, wherein:

[0014] The first end of the first connecting pipe is used to be inserted into the gas inlet of the gas intake passage of the throttle valve, so that the outer wall of the first connecting pipe and the inner wall of the gas inlet of the gas intake passage of the throttle valve are sealed and connected, and the second end of the first connecting pipe is inserted into the first connecting port of the capsule body, and the outer wall of the first connecting pipe is sealed and connected with the inner wall of the first connecting port;

[0015] The first end of the second connecting tube is used to be inserted into the gas outlet of the gas pipeline so that the outer wall of the second connecting tube and the inner wall of the gas outlet of the gas pipeline are sealed and connected. The second end of the second connecting tube is inserted into the second connecting port of the bag body, and the outer wall of the second connecting tube and the inner wall of the second connecting port are sealed and connected.

[0016] Preferably, the first connecting tube and the second connecting tube are respectively detachably connected to the bladder body.

[0017] Preferably, a first limiting protrusion is provided at the middle portion of the first connecting tube, and a second limiting protrusion is provided at the middle portion of the second connecting tube.

[0018] Preferably, the first connecting tube and the second connecting tube are made of metal material, and the bladder is made of rubber material.

[0019] Preferably, the first connecting tube, the second connecting tube and the capsule are integrally formed of metal material.

[0020] According to the second aspect of the present application, the present application provides a multi-fuel engine, including a throttle valve, and also including the gas intake anti-standing wave structure as described in any one of the first aspects above.

[0021] Due to the adoption of the above technical solution, this application has the following beneficial effects:

[0022] On the basis of the prior art, the present application provides a gas intake standing wave prevention structure including a sac having a cavity between the gas inlet of the gas intake passage of the throttle valve of the engine and the gas outlet of the gas pipeline, and makes the diameter of at least a part of the cavity of the sac larger than the inner diameter of the gas pipeline, thereby achieving effective suppression of standing waves in the gas pipeline by changing the opening diameter of the connecting end of the gas pipeline and the gas inlet of the gas intake passage, and can well suppress the generation of standing waves in the gas pipeline connected to the gas inlet of the gas intake passage of the throttle valve, thereby effectively increasing the flow rate of the gas in the gas pipeline, and ensuring the stability of the gas flow, and can effectively improve the engine performance when using gas as fuel.

[0023] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the specific implementation of the present application or the technical solution in the prior art, the following is a brief introduction to the drawings required for use in the specific implementation or the prior art description. In all drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, each element or part is not necessarily drawn according to the actual scale. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can also be obtained based on these drawings without paying creative work.

[0025] Figure 1 It is a schematic cross-sectional view of a gas intake anti-standing wave structure in one embodiment of the present application;

[0026] Figure 2 yes Figure 1 Exploded diagram of

[0027] Figure 3 It is a three-dimensional diagram of the connection state between the gas intake anti-standing wave structure and the throttle valve in one embodiment of the application. DETAILED DESCRIPTION

[0028] The exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

[0029] It will be understood by those skilled in the art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as those generally understood by those skilled in the art to which this application belongs. It should also be understood that terms such as those defined in general dictionaries should be understood to have meanings consistent with the meanings in the context of the prior art, and will not be interpreted with idealized or overly formal meanings unless specifically defined.

[0030] In this application, the terms "first", "second", etc. are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0031] In addition, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0032] like Figure 1-3 As shown, the embodiment of the present application provides a gas intake standing wave prevention structure, which is arranged between the gas inlet 111 of the gas intake passage 11 of the throttle 1 of the engine and the gas outlet of the gas pipeline (not shown in the figure), wherein:

[0033] The gas intake anti-standing wave structure includes a sac 2 with a cavity 21, and a first connecting port 22 and a second connecting port 23 are respectively provided at two axial ends of the sac 2. The sac 2 is connected to the gas inlet 111 of the gas intake channel 11 of the throttle 1 through the first connecting port 22, and the sac 2 is connected to the gas outlet of the gas pipeline through the second connecting port 23. The diameter of at least a portion of the cavity 21 of the sac 2 is larger than the inner diameter of the gas pipeline.

[0034] On the basis of the prior art, the present embodiment provides a gas intake standing wave prevention structure including a sac 2 having a cavity 21 between the gas inlet 111 of the gas intake passage 11 of the throttle valve 1 of the engine and the gas outlet of the gas pipeline, and makes the diameter of at least a part of the cavity 21 of the sac 2 larger than the inner diameter of the gas pipeline, thereby achieving effective suppression of standing waves in the gas pipeline by changing the opening diameter of the connecting end of the gas pipeline and the gas inlet 111 of the gas intake passage 11, and can well suppress the generation of standing waves in the gas pipeline connected to the gas inlet 111 of the gas intake passage 11 of the throttle valve 1, thereby effectively increasing the flow rate of the gas in the gas pipeline, and ensuring the stability of the gas flow, and can effectively improve the engine performance when using gas as fuel.

[0035] In one embodiment, the throttle 1 includes a throttle 1 body, a gas intake passage 11 is arranged in the throttle 1 body, and the bladder 2 is integrally formed with the throttle 1 body, that is, the existing throttle 1 is modified, and a bladder 2 is integrally formed at the gas inlet 111 of the gas intake passage 11 of the throttle 1 body. In this way, when the throttle 1, the gas intake anti-standing wave structure and the gas pipeline are connected, it is only necessary to connect the gas pipeline to the second connecting port 23 of the bladder 2 on the throttle 1 body, thereby reducing the complexity of the direct connection operation of the throttle 1, the gas intake anti-standing wave structure and the gas pipeline.

[0036] In one embodiment, the bladder 2 is integrally formed with the gas pipeline, that is, a bladder 2 is integrally formed at one end of the gas outlet of the gas pipeline. In this way, when the throttle valve 1, the gas intake anti-standing wave structure and the gas pipeline are connected, it is only necessary to connect the first connecting port 22 of the bladder 2 on the gas pipeline with the gas inlet 111 of the gas intake channel 11 of the throttle valve 1 main body, thereby reducing the complexity of the direct connection operation between the throttle valve 1, the gas intake anti-standing wave structure and the gas pipeline.

[0037] In one embodiment, the first connection port 22 of the capsule 2 is detachably connected to the gas inlet 111 of the gas inlet passage 11 of the throttle 1, and the second connection port 23 of the capsule 2 is detachably connected to the gas outlet of the gas pipeline. This arrangement facilitates the disassembly, repair and replacement of the capsule 2 when a problem occurs.

[0038] In one embodiment, the gas intake anti-standing wave structure further includes a first connecting pipe 3 and a second connecting pipe 4, wherein:

[0039] The first end of the first connecting pipe 3 is used to be inserted into the gas inlet 111 of the gas intake passage 11 of the throttle valve 1, so that the outer wall of the first connecting pipe 3 and the inner wall of the gas inlet 111 of the gas intake passage 11 of the throttle valve 1 are sealed and connected, and the second end of the first connecting pipe 3 is inserted into the first connecting port 22 of the capsule 2, and the outer wall of the first connecting pipe 3 is sealed and connected with the inner wall of the first connecting port 22;

[0040] The first end of the second connecting tube 4 is used to be inserted into the gas outlet of the gas pipeline so that the outer wall of the second connecting tube 4 is sealedly connected to the inner wall of the gas outlet of the gas pipeline. The second end of the second connecting tube 4 is inserted into the second connecting port 23 of the bag body 2, and the outer wall of the second connecting tube 4 is sealedly connected to the inner wall of the second connecting port 23.

[0041] In this embodiment, the first connecting pipe 3 and the second connecting pipe 4 are provided to facilitate the mutual connection between the throttle valve 1, the bladder 2 and the gas pipeline.

[0042] In one embodiment, the first connecting tube 3 and the second connecting tube 4 are detachably connected to the bladder body 2. This arrangement facilitates the bladder body 2 to be replaced separately when a problem occurs with the bladder body 2.

[0043] In one embodiment, a first limiting protrusion 31 is provided in the middle of the first connecting tube 3, and a second limiting protrusion 41 is provided in the middle of the second connecting tube 4. In this way, the first limiting protrusion 31 limits the insertion depth of the first connecting tube 3 when plugged with the capsule 2 and the throttle valve 1, so that it is convenient for users to check whether the two ends of the first connecting tube 3 are respectively connected to the capsule 2 and the throttle valve 1, and ensure the air tightness of the connection parts; the second limiting protrusion 41 limits the insertion depth of the second connecting tube 4 when plugged with the capsule 2 and the gas pipeline, so that it is convenient for users to check whether the two ends of the second connecting tube 4 are respectively plugged to the capsule 2 and the gas pipeline, and ensure the air tightness of the connection parts.

[0044] In one embodiment, the first connecting tube 3 and the second connecting tube 4 are made of metal material, and the bladder body 2 is made of rubber material. Since the bladder body 2 made of rubber material can have a strong deformation ability, and the first connecting tube 3 and the second connecting tube 4 made of metal have a high hardness, such a configuration facilitates the plugging of the first connecting tube 3 and the second connecting tube 4 with the bladder body 2 respectively and ensures good sealing of the plugging parts.

[0045] In one embodiment, the first connecting pipe 3, the second connecting pipe 4 and the bladder 2 are integrally formed of metal materials. In this way, the entire gas intake anti-standing wave structure forms an integral component, which is convenient for the production of the gas intake anti-standing wave structure and the assembly of the gas intake anti-standing wave structure on the engine. The use of metal materials can ensure that the gas intake anti-standing wave structure has good compression and deformation resistance.

[0046] An embodiment of the present application also provides a multi-fuel engine, which includes a throttle valve and also includes the fuel gas intake anti-standing wave structure described in any of the above embodiments.

[0047] It should be noted that, since the multi-fuel engine includes the gas intake anti-standing wave structure in the above embodiment, the multi-fuel engine has the same technical effect as the gas intake anti-standing wave structure in the above embodiment, which will not be repeated here.

[0048] Specifically, in the present embodiment, the multi-fuel engine may be a multi-fuel engine capable of using one of gasoline and fuel oil, and at least one of natural gas and LPG liquefied petroleum gas.

[0049] Those skilled in the art will appreciate that, although some embodiments herein include certain features included in other embodiments but not other features, the combination of features of different embodiments is meant to be within the scope of the present application and form different embodiments. In some instances, well-known methods, structures, and techniques are not shown in detail so as not to obscure the understanding of this specification.

[0050] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application.

Claims

1. A gas intake anti-standing wave structure, characterized in that: The gas intake anti-standing wave structure is arranged between the gas inlet of the gas intake passage of the engine throttle and the gas outlet of the gas pipeline, wherein: The gas intake anti-standing wave structure includes a sac with a cavity, and a first connecting port and a second connecting port are respectively opened at two axial ends of the sac. The sac is connected with the gas inlet of the gas intake channel of the throttle through the first connecting port, and the sac is connected with the gas outlet of the gas pipeline through the second connecting port. The diameter of at least a portion of the cavity of the sac is larger than the inner diameter of the gas pipeline.

2. The gas intake anti-standing wave structure according to claim 1, characterized in that: The throttle valve comprises a throttle valve body, the fuel gas intake passage is arranged in the throttle valve body, and the capsule is integrally formed with the throttle valve body.

3. The gas intake anti-standing wave structure according to claim 1, characterized in that: The bladder body and the gas pipeline are integrally formed.

4. The gas intake anti-standing wave structure according to claim 1, characterized in that: The first connection port of the capsule is detachably connected to the gas inlet of the gas inlet passage of the throttle valve, and the second connection port of the capsule is detachably connected to the gas outlet of the gas pipeline.

5. The gas intake anti-standing wave structure according to claim 4, characterized in that: It also includes a first connecting pipe and a second connecting pipe, wherein: The first end of the first connecting pipe is used to be inserted into the gas inlet of the gas intake passage of the throttle valve, so that the outer wall of the first connecting pipe and the inner wall of the gas inlet of the gas intake passage of the throttle valve are sealed and connected, and the second end of the first connecting pipe is inserted into the first connecting port of the capsule body, and the outer wall of the first connecting pipe is sealed and connected with the inner wall of the first connecting port; The first end of the second connecting tube is used to be inserted into the gas outlet of the gas pipeline so that the outer wall of the second connecting tube and the inner wall of the gas outlet of the gas pipeline are sealed and connected. The second end of the second connecting tube is inserted into the second connecting port of the bag body, and the outer wall of the second connecting tube and the inner wall of the second connecting port are sealed and connected.

6. The gas intake anti-standing wave structure according to claim 5, characterized in that: The first connecting tube and the second connecting tube are respectively detachably connected to the sac body.

7. The gas intake anti-standing wave structure according to claim 6, characterized in that: A first limiting protrusion is provided at the middle of the first connecting tube, and a second limiting protrusion is provided at the middle of the second connecting tube.

8. The gas intake anti-standing wave structure according to claim 6, characterized in that: The first connecting tube and the second connecting tube are made of metal material, and the bladder is made of rubber material.

9. The gas intake anti-standing wave structure according to claim 5, characterized in that: The first connecting tube, the second connecting tube and the bladder body are integrally formed of metal material.

10. A multi-fuel engine, comprising a throttle valve, characterized in that: It also includes the gas intake anti-standing wave structure as described in any one of claims 1-9.

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