An internal combustion engine gas mixer

Abstract

The present invention discloses an internal combustion engine gas mixer, which relates to the technical field of gas mixers. The key points of its technical solution include an exhaust gas inlet passage, an air inlet passage, a diversion passage, and a mixed gas outlet passage; a diversion support wing is arranged in the diversion passage, and the diversion support wing divides the diversion passage into a plurality of diversion sub-passages arranged at intervals; a first exhaust gas diversion passage communicated with the exhaust gas inlet passage is arranged in the diversion support wing, and a first exhaust gas outlet communicated with the first exhaust gas diversion passage is arranged at the end of the diversion support wing; the first exhaust gas outlet is located at the end of the diversion passage. The present invention performs cross-surrounding mixing of the exhaust gas flow and the air-fuel mixed gas flow, which can improve the mixing uniformity and mixing speed, improve the exhaust gas recirculation effect, and can reduce the introduction resistance of the exhaust gas and increase the introduction amount of the exhaust gas, so as to achieve a higher power density of the engine and reduce the comprehensive gas consumption.

Description

Technical Field

[0001] The present invention relates to the technical field of gas mixers, and more specifically, to an internal combustion engine gas mixer. Background Art

[0002] In response to the requirements of emission standards for reducing nitrogen oxides, gas engines can adopt the technical routes of stoichiometric combustion, single-point premixing, and exhaust gas recirculation. Among them, the exhaust gas recirculation technical route involves an exhaust gas mixer.

[0003] The existing Chinese patent with the publication number CN115244292A discloses a passive pumping for exhaust gas recirculation, which includes an engine exhaust gas recirculation mixer. The mixer includes a plurality of converging nozzles arranged side by side, an exhaust gas housing, and a plurality of converging-diverging nozzles arranged side by side; each of the plurality of converging-diverging nozzles corresponds to one of the plurality of converging nozzles, and each of the plurality of converging-diverging nozzles includes an air-exhaust gas inlet in fluid communication to receive a fluid flow from the corresponding converging nozzle and the interior of the exhaust gas housing.

[0004] However, the mixer in the above patent still has the following problems: (1) The intake air volume of the single inlet of the air-exhaust gas inlet is small, and the gas mixing uniformity is insufficient, affecting the exhaust gas recirculation effect; (2) When the engine is at high speed, the intake resistance is large, increasing the fuel gas consumption; when the engine is at low speed, the introduction ability of the exhaust gas is insufficient, affecting the engine emissions and gas consumption; (3) The special-shaped curve structure leads to greater processing difficulty and higher cost. Summary of the Invention

[0005] Aiming at the deficiencies of the existing technology, the purpose of the present invention is to provide an internal combustion engine gas mixer, which cross-encloses and mixes the exhaust gas flow and the air-fuel mixed gas flow, can improve the mixing uniformity and mixing speed, improve the exhaust gas recirculation effect, and can reduce the introduction resistance of the exhaust gas and increase the introduction amount of the exhaust gas, so as to achieve a higher power density of the engine and reduce the comprehensive gas consumption.

[0006] To achieve the above purpose, the present invention provides the following technical solutions:

[0007] An internal combustion engine gas mixer, an exhaust gas inlet passage is provided in the mixer, and an air inlet passage, a diversion passage, and a mixed air outlet passage are arranged in sequence along the axial direction;

[0008] A diversion support wing is provided in the diversion passage, and the diversion support wing divides the diversion passage into a plurality of diversion sub-passages arranged at intervals;

[0009] A first exhaust gas diversion channel connected to the exhaust gas inlet channel is arranged in the guide support wing, and a first exhaust gas outlet connected to the first exhaust gas diversion channel is arranged at the end of the guide support wing; the first exhaust gas outlet is located at the end of the guide channel.

[0010] Further, the guide support wing includes a plurality of support wings arranged crosswise; or, the guide support wing includes a plurality of support wings arranged in parallel.

[0011] Furthermore, the plurality of support wings are cross-arranged in a radially radiating manner;

[0012] Alternatively, the plurality of support wings are arranged vertically and crosswise in a matrix.

[0013] Furthermore, a second exhaust gas outlet is provided at the end of the guide channel, and a second exhaust gas diversion channel is provided between the second exhaust gas outlet and the exhaust gas inlet channel; the second exhaust gas outlet is located radially outside the first exhaust gas outlet and the guide branch channel.

[0014] Further, the second exhaust gas outlet includes a plurality of arc-shaped exhaust gas outlets arranged at intervals along the circumferential direction; or, the second exhaust gas outlet includes a circular ring-shaped exhaust gas outlet.

[0015] Furthermore, the first exhaust gas outlet and the plurality of arc-shaped exhaust gas outlets are arranged alternately along the circumferential direction.

[0016] Furthermore, the second exhaust gas guiding channel is located radially outside the guiding channel, a connecting diffusion channel is provided between the end of the guiding channel and the front end of the mixed gas outlet channel, and the second exhaust gas outlet is provided on the inner side wall of the connecting diffusion channel.

[0017] Furthermore, an exhaust gas diffusion section is provided in the first exhaust gas guiding channel.

[0018] Furthermore, a conical air outlet guide body extending into the mixed air outlet channel is provided at the end of the guide support wing, and the conical air outlet guide body is coaxially arranged with the guide channel;

[0019] The conical air outlet guide body is a solid structure; or, a waste gas diversion branch channel connected to the first waste gas diversion channel is arranged in the conical air outlet guide body, and a third waste gas outlet connected to the waste gas diversion branch channel is arranged at the end of the conical air outlet guide body.

[0020] Furthermore, the side wall of the guide support wing is provided with an exhaust gas seepage port, and the exhaust gas seepage port is respectively connected with the first exhaust gas guide channel and the guide branch channel.

[0021] Furthermore, the air inlet channel comprises an air inlet convergence channel formed by an annular cone surface, and the cone angle of the annular cone surface is 28 to 36 degrees.

[0022] Furthermore, a conical intake air guide is provided at the front end of the diversion support wing and extends into the air intake passage; and / or, an intake air dividing profile is provided at the front end of the diversion support wing.

[0023] Furthermore, the mixed exhaust passage includes a mixed exhaust diffusion passage, and the front end of the mixed exhaust diffusion passage is connected to the end of the diversion passage.

[0024] Furthermore, a fuel gas intake passage communicating with the air intake passage or the diversion passage is also provided in the mixer.

[0025] Furthermore, a drainage passage communicating with the exhaust gas intake passage is provided at the end of the mixed exhaust passage.

[0026] In summary, the present invention has the following beneficial effects:

[0027] 1. The exhaust gas flow discharged from the first exhaust gas outlet and the first mixed gas flow cross-mix in the axial flow path, which is beneficial to improving the mixing uniformity and mixing speed, enhancing the exhaust gas recirculation effect, and can reduce the intake resistance of the exhaust gas, increase the intake amount of the exhaust gas, thereby achieving a higher power density of the engine and reducing the comprehensive gas consumption;

[0028] 2. The exhaust gas flow discharged from the second exhaust gas outlet surrounds the first mixed gas flow, and the exhaust gas flow discharged from the first exhaust gas outlet cross-mixes with the first mixed gas flow, forming a cross-surrounding mixing of the exhaust gas flow on the first mixed gas flow, thereby further improving the mixing uniformity and mixing speed, and can further reduce the intake resistance of the exhaust gas and increase the intake amount of the exhaust gas;

[0029] 3. The adoption of the third exhaust gas outlet is beneficial to further reducing the intake resistance of the exhaust gas and increasing the intake amount of the exhaust gas;

[0030] 4. An exhaust gas diffusion section is provided in the first exhaust gas diversion passage, which can further reduce the intake resistance of the exhaust gas and increase the intake amount of the exhaust gas;

[0031] 5. The adoption of the exhaust gas seepage outlet is beneficial to further reducing the intake resistance of the exhaust gas, increasing the intake amount of the exhaust gas, and improving the mixing uniformity;

[0032] 6. The structure is simple, which can reduce the processing difficulty and production cost;

[0033] 7. The second mixed gas flow directly diffuses without secondary convergence, which is beneficial to reducing the intake resistance of the exhaust gas and increasing the intake amount of the exhaust gas. Description of the Drawings

[0034] Figure 1Structural schematic of the internal combustion engine gas mixer in Embodiment 1 Figure 1 ;

[0035] Figure 2 Structural schematic of the internal combustion engine gas mixer in Embodiment 1 Figure 2 ;

[0036] Figure 3 Structural schematic of the internal combustion engine gas mixer in Embodiment 1 Figure 3 ;

[0037] Figure 4 Structural schematic of the inner shell in Embodiment 1 Figure 1 ;

[0038] Figure 5 Structural schematic of the inner shell in Embodiment 1 Figure 2 ;

[0039] Figure 6 Structural schematic of the internal combustion engine gas mixer in Embodiment 1 Figure 4 ;

[0040] Figure 7 Structural schematic of the inner shell in Embodiment 1 Figure 3 ;

[0041] Figure 8 Structural schematic of the inner shell in Embodiment 1 Figure 4 ;

[0042] Figure 9 Structural schematic diagram of the inner shell in Embodiment 2;

[0043] Figure 10 Structural schematic diagram of the inner shell in Embodiment 3;

[0044] Figure 11 Structural schematic of the inner shell in Embodiment 4 Figure 1 ;

[0045] Figure 12 Structural schematic of the inner shell in Embodiment 4 Figure 2 ;

[0046] Figure 13 Structural schematic of the inner shell in Embodiment 4 Figure 3 ;

[0047] Figure 14 Structural schematic of the inner shell in Embodiment 4 Figure 4 ;

[0048] Figure 15 Structural schematic of the inner shell in Embodiment 4 Figure 5 .

[0049] In the figure: 1. Outer shell; 11. Exhaust gas inlet channel entrance; 2. Inner shell; 21. Air inlet converging channel; 211. Gas inlet; 22. Flow guiding channel; 221. Flow guiding branch channel; 222. Second exhaust gas diversion channel; 223. Second exhaust gas outlet; 224. Pressure detection port; 23. Mixed gas outlet diffusion channel; 231. Drainage channel; 24. Flow guiding support wing; 241. First exhaust gas diversion channel; 2411. Arc-shaped channel; 242. First exhaust gas outlet; 243. Exhaust gas diffusion section; 244. Exhaust gas seepage outlet; 245. Intake air segmentation profile; 25. Conical intake air guide; 26. Conical outlet air guide; 261. Exhaust gas diversion branch channel; 262. Third exhaust gas outlet; 27. Connecting diffusion channel; 31. Exhaust gas inlet channel; 32. Annular pressure detection cavity; 33. Gas inlet channel; 4. Gas connector; 5. Pressure sensor. Specific implementation mode

[0050] The present invention will be further described in detail below with reference to the accompanying drawings.

[0051] This specific embodiment is only an explanation of the present invention and does not limit the present invention. After reading this specification, those skilled in the art can make modifications to this embodiment without creative contributions as needed, but as long as it is within the scope of the claims of the present invention, it is protected by the patent law.

[0052] Embodiment 1:

[0053] An internal combustion engine gas mixer, referring to Figures 1 to 8 , in this embodiment, the mixer includes an outer shell 1 and an inner shell 2. The outer shell 1 is axially penetrated, and the inner shell 2 is embedded in the outer shell 1; an annular exhaust gas inlet channel 31 is provided between the inner side wall of the outer shell 1 and the outer side wall of the inner shell 2, and an exhaust gas inlet channel entrance 11 communicating with the exhaust gas inlet channel 31 is opened on the outer shell 1.

[0054] Referring to Figures 1 to 8 , in this embodiment, an air inlet channel, a flow guiding channel 22 and a mixed gas outlet channel are arranged in sequence along the axis inside the inner shell 2; in this embodiment, the air inlet channel includes an air inlet converging channel 21 formed by an annular conical surface, and the cone angle of the annular conical surface is 28 - 36°; the cone angle of the annular conical surface is 28 - 36°, which is beneficial to realizing rapid air convergence and acceleration and can minimize the flow resistance to the greatest extent; in this embodiment, the mixed gas outlet channel includes a mixed gas outlet diffusion channel 23 formed by an annular conical surface, and the flow guiding channel 22 is a straight pipe channel; wherein, the end of the air inlet converging channel 21 is connected to the front end of the flow guiding channel 22, and a connecting diffusion channel 27 is provided between the end of the flow guiding channel 22 and the front end of the mixed gas outlet diffusion channel 23.

[0055] Referring to Figures 1 to 8, in this embodiment, a gas inlet passage 33 is further provided between the outer sidewall of the inner shell 2 and the inner sidewall of the outer shell 1, and a plurality of gas inlets 211 evenly distributed in the circumferential direction are provided on the inner sidewall of the inner shell 2; a gas connector 4 is provided on the outer sidewall of the outer shell 1, and the gas connector 4 is communicated with the gas inlet passage 33 for introducing gas; wherein, in this embodiment, the gas inlets 211 are respectively communicated with the gas inlet passage 33 and the air inlet converging passage 21; that is, after the air enters the air inlet converging passage 21, it is mixed with the gas to form a first mixed gas flow; connecting the gas inlets 211 with the air inlet converging passage 21 is beneficial to the introduction and mixing of high-pressure gas; in other alternative embodiments, the gas inlets can also be communicated with the diversion passage 22, which is beneficial to the introduction of gas, and no limitation is made here; in this embodiment, a plurality of gas inlets 211 evenly distributed in the circumferential direction are provided on the inner sidewall of the inner shell 2, which is beneficial to realizing the rapid mixing of air and gas and improving the mixing uniformity; in other alternative embodiments, the gas can also be introduced by inserting a gas inlet pipe into the air inlet converging passage 21 or the diversion passage 22, and no limitation is made here; wherein, the gas inlet pipe can also be inserted into the diversion support wing; the mixer in this embodiment is used for the three-medium mixing of air, gas and exhaust gas. In other alternative embodiments, it can also be only used for the two-medium mixing of air and exhaust gas, and no limitation is made here; when used as a mixer for air and exhaust gas, it can be used for engines such as diesel engines.

[0056] Refer to Figures 1 to 8 , in this embodiment, an annular pressure detection cavity 32 is further provided between the outer sidewall of the inner shell 2 and the inner sidewall of the outer shell 1, and a plurality of pressure detection ports 224 evenly distributed in the circumferential direction are provided on the inner sidewall of the inner shell 2; one end of the pressure detection port 224 is communicated with the diversion branch passage 221, and the other end is communicated with the annular pressure detection cavity 32; a pressure sensor 5 is provided on the outer sidewall of the outer shell 1, and the detection end of the pressure sensor 5 extends into the annular pressure detection cavity 32 for detecting the air pressure in the diversion branch passage 221; the cooperation of the pressure detection port 224 and the annular pressure detection cavity 32 is beneficial to avoiding the influence of moisture or impurities on the pressure sensor 5, prolonging the service life of the pressure sensor 5 and improving the detection accuracy.

[0057] Refer to Figures 1 to 8, preferably, in this embodiment, a flow guiding support wing 24 located in the flow guiding channel 22 is provided on the inner side wall of the inner shell 2. The flow guiding support wing 24 divides the flow guiding channel 22 into a plurality of flow guiding sub-channels 221 arranged at intervals; in this embodiment, the flow guiding support wing 24 includes a plurality of support wings arranged in a cross pattern. Specifically, it includes four support wings arranged in a radially radiating cross pattern, thereby dividing the flow guiding channel 22 into four flow guiding sub-channels 221; specifically, in this embodiment, the flow guiding support wing 24 includes a central axis and four support wings evenly arranged around the central axis; the radially inner ends of the support wings are connected to the central axis, and the radially outer ends are connected to the inner side wall of the flow guiding channel; in other alternative embodiments, the central axis can also be cancelled, and the radially inner ends of the plurality of support wings can be directly connected together, which is not limited herein; the flow guiding channel 22 is a straight pipe channel, and the divided flow guiding sub-channels 221 are fan-shaped channels; of course, in other alternative embodiments, the number of support wings in the flow guiding support wing 24 can be adjusted as needed, and the cross arrangement method can also be adjusted, which is not limited herein; in other alternative embodiments, the flow guiding support wing can also include a plurality of support wings arranged in parallel, or can include one support wing, which is not limited herein.

[0058] Refer to Figures 1 to 8 , specifically, in this embodiment, a conical intake air guiding body 25 extending into the air intake converging channel 21 is provided at the front end of the flow guiding support wing 24, and a conical exhaust air guiding body 26 extending into the mixed exhaust diffusing channel 23 is provided at the end of the flow guiding support wing 24; the conical intake air guiding body 25, the air intake converging channel 21, the flow guiding channel 22, and the conical exhaust air guiding body 26 are coaxially arranged; by using the conical intake air guiding body 25, the gas converging distance is effectively shortened, and the converging angle is not increased at the same time, so as to achieve rapid convergence while maintaining the optimal converging angle; the conical exhaust air guiding body 26 is a solid structure, which is beneficial to the rapid diffusion of the second mixed air flow.

[0059] Refer to Figures 1 to 8 , in this embodiment, a first exhaust gas guiding channel 241 communicated with the exhaust gas inlet channel 31 is provided in the flow guiding support wing 24; the first exhaust gas guiding channel 241 penetrates through the side wall of the inner shell 2, so as to be communicated with the exhaust gas inlet channel 31; that is, in this embodiment, the flow guiding support wing 24 is a hollow structure, and the first exhaust gas guiding channel 241 is a cross-shaped channel; the flow guiding support wing 24 is provided with a first exhaust gas outlet 242 communicated with the first exhaust gas guiding channel 241 at the end, and the first exhaust gas outlet 242 is located at the end of the flow guiding channel 22.

[0060] Refer to Figures 1 to 8, a low pressure is formed at the end of the diversion channel 22, and the exhaust gas in the channel 31 is inhaled into the first exhaust gas diversion channel 241 through the low pressure, and then discharged through the first exhaust gas outlet 242; the first mixed air flow enters the four diversion branch channels 221 respectively, and then is discharged from the end of the diversion branch channel 221; the exhaust gas flow and the first mixed air flow are mixed to form a second mixed air flow, and the second mixed air flow enters the mixed air outlet diffusion channel 23, and then is discharged through the mixed air outlet diffusion channel 23.

[0061] Refer to Figures 1 to 8 , in this embodiment, the exhaust gas flow and the first mixed air flow are cross-mixed in the axial flow path, which is beneficial to improving the mixing uniformity and mixing speed, and improving the exhaust gas circulation effect; the second mixed air flow directly diffuses without secondary convergence, which is beneficial to reducing the introduction resistance of the exhaust gas and increasing the introduction amount of the exhaust gas; the use of the first exhaust gas outlet 242 is beneficial to increasing the exhaust gas inhalation capacity, reducing the introduction resistance of the exhaust gas, and increasing the exhaust gas entry amount.

[0062] Refer to Figures 1 to 8 , a conical air outlet guide body 26 is arranged at the end of the diversion support wing 24. Therefore, in this embodiment, the first exhaust gas outlet 242 includes four outlets evenly distributed in the circumferential direction, and the four outlets are arranged in a cross shape; that is, the diversion support wing 24 includes four support wings, and the axial ends of the support wings form outlets; among them, the outlets of the four support wings and the outlets of the four diversion branch channels are arranged staggeredly in the circumferential direction; therefore, the four exhaust gas flows and the four first mixed air flows are cross-mixed in the circumferential direction, which is beneficial to improving the mixing uniformity and mixing speed, improving the exhaust gas circulation effect, and is beneficial to reducing the introduction resistance of the exhaust gas and increasing the introduction amount of the exhaust gas.

[0063] Refer to Figures 1 to 8 , preferably, an exhaust gas diffusion section 243 is arranged in the first exhaust gas diversion channel 241; specifically, the exhaust gas diffusion section 243 includes two symmetrically arranged inclined surfaces; a single outlet of the first exhaust gas outlet 242 is located at the end of the exhaust gas diffusion section 243; arranging the exhaust gas diffusion section 243 in the first exhaust gas diversion channel 241 can further reduce the introduction resistance of the exhaust gas and increase the introduction amount of the exhaust gas.

[0064] Refer to Figures 1 to 8 , preferably, a second exhaust gas outlet 223 is further arranged at the end of the diversion channel 22 in this embodiment; the second exhaust gas outlet 223 is located radially outside the first exhaust gas outlet 242 and the diversion branch channel 221; the exhaust gas flow discharged from the second exhaust gas outlet 223 surrounds the first mixed air flow, and the exhaust gas flow discharged from the first exhaust gas outlet 242 cross-mixes with the first mixed air flow, forming a cross-surrounding mixing of the exhaust gas flow to the first mixed air flow, so as to further improve the mixing uniformity and mixing speed, and can further reduce the introduction resistance of the exhaust gas and increase the introduction amount of the exhaust gas.

[0065] Reference Figures 1 to 8 In this embodiment, the second exhaust gas diversion channel 222 is located radially outside the diversion channel 22, and the second exhaust gas outlet 223 is provided on the inner side wall of the connecting diffusion channel 27. After the exhaust gas introduction flow rate increases, the use of the connecting diffusion channel 27 helps to reduce the flow resistance of the mixed gas flow; specifically, the second exhaust gas diversion channel 222 is formed on the outer side wall of the inner shell 2; in this embodiment, the second exhaust gas outlet 223 includes four arc-shaped exhaust gas outlets arranged at intervals in the circumferential direction; the four outlets of the first exhaust gas outlet 242 and the four arc-shaped exhaust gas outlets of the second exhaust gas outlet 223 are arranged staggeredly in the circumferential direction, and the four arc-shaped exhaust gas outlets of the second exhaust gas outlet 223 are respectively located radially outside the ends of the four diversion branch channels 221. This can improve the mixing uniformity and mixing speed, and reduce the exhaust gas introduction resistance, thereby increasing the exhaust gas introduction volume.

[0066] Reference Figures 1 to 8 Preferably, in this embodiment, a drainage channel 231 communicating with the exhaust gas inlet channel 31 is provided on the inner side wall at the end of the mixed gas outlet diffusion channel 23. The water in the exhaust gas inlet channel 31 is discharged through the drainage channel 231 to prevent the water from freezing at low temperatures and blocking the connection between the exhaust gas diversion channel and the exhaust gas inlet channel.

[0067] Embodiment 2:

[0068] An internal combustion engine gas mixer, referring to Figures 1 to 9 Based on Embodiment 1, the difference between this embodiment and Embodiment 1 is that: in this embodiment, an exhaust gas diversion branch channel 261 communicating with the first exhaust gas diversion channel 241 is provided inside the conical gas outlet guide body 26, and a third exhaust gas outlet 262 communicating with the exhaust gas diversion branch channel 261 is provided at the end of the conical gas outlet guide body 26; the use of the third exhaust gas outlet 262 helps to further reduce the exhaust gas introduction resistance and increase the exhaust gas introduction volume; in other alternative embodiments, the conical gas outlet guide body 26 can also be cancelled, so that the first exhaust gas outlet 242 is a cross-shaped through outlet, which is not limited here.

[0069] Embodiment 3:

[0070] An internal combustion engine gas mixer, referring to Figures 1 to 10 Based on Embodiment 2, the difference between this embodiment and Embodiment 2 is that: in this embodiment, a plurality of exhaust gas seepage outlets 244 are provided on the side wall of the diversion support wing 24, and the exhaust gas seepage outlets 244 communicate with the first exhaust gas diversion channel 241 and the diversion branch channels 221 respectively; the use of the exhaust gas seepage outlets 244 helps to further reduce the exhaust gas introduction resistance, increase the exhaust gas introduction volume, and improve the mixing uniformity.

[0071] Embodiment 4:

[0072] An internal combustion engine gas mixer, referring to Figures 1 to 15 , based on Embodiment 1, the difference between this embodiment and Embodiment 1 is that: in this embodiment, the flow guiding support wing 24 includes a plurality of support wings arranged in a cross pattern, but the cross arrangement method is different from that in Embodiment 1. In this embodiment, the plurality of support wings are arranged in a matrix-type vertical cross pattern; specifically, in this embodiment, the flow guiding support wing 24 includes a longitudinal support wing and two transverse support wings that are vertically intersecting with the longitudinal support wing, and the two transverse support wings are arranged in parallel; then, the flow guiding support wing 24 in this embodiment divides the flow guiding channel 22 into six flow guiding sub-channels 221; of course, in other alternative embodiments, the number of longitudinal support wings and transverse support wings can be adjusted as needed, which is not limited here. For example, two longitudinal support wings and two transverse support wings.

[0073] Referring to Figures 1 to 15 , in this embodiment, the conical intake air guiding body 25 is cancelled at the front end of the flow guiding support wing 24, but an intake air dividing profile 245 is provided at the front end of the flow guiding support wing 24; by adopting the intake air dividing profile 245, the gas convergence distance can be effectively shortened.

[0074] Referring to Figures 1 to 15 , in this embodiment, the second exhaust gas diversion channel 222 is located radially inside the flow guiding channel 22, and the second exhaust gas diversion channel 222 communicates with the first exhaust gas diversion channel 241; the end of the second exhaust gas diversion channel 222 forms a second exhaust gas outlet 223, and the second exhaust gas outlet 223 is an annular exhaust gas outlet; and, the second exhaust gas outlet 223 communicates with the first exhaust gas outlet 242; in this embodiment, the first exhaust gas diversion channel 241 penetrates through the side wall of the inner shell 2, so as to communicate with the exhaust gas inlet channel 31; preferably, the through hole of the first exhaust gas diversion channel 241 on the side wall of the inner shell 2 extends circumferentially to form an arc-shaped channel 2411, and the arc-shaped channel 2411 communicates with the second exhaust gas diversion channel 222; that is, in this embodiment, the arc-shaped channel 2411 communicates with the first exhaust gas diversion channel 241 and the second exhaust gas diversion channel 222 respectively, and the arc-shaped channel 2411 communicates with the exhaust gas inlet channel 31, so as to realize the introduction of exhaust gas; preferably, arc-shaped channels 2411 are respectively arranged at two positions along the axial direction of the side wall of the inner shell 2, and a plurality of arc-shaped channels 2411 arranged circumferentially are provided at each position, so as to ensure the smooth introduction of exhaust gas; by adopting the arc-shaped channel 2411, the inner shell 2 can also adopt an integral structure, which is convenient for processing and assembly.

[0075] Referring to Figures 1 to 15 , the exhaust gas flows discharged from the second exhaust gas outlet 223 and the first exhaust gas outlet 242 are cross-surrounded and mixed with the first mixed gas flow in the axial flow path, which is beneficial to improving the mixing uniformity and mixing speed, improving the exhaust gas circulation effect, and is also beneficial to reducing the exhaust gas introduction resistance and increasing the exhaust gas introduction amount.

Claims

1. An internal combustion engine gas mixer, characterized in that: The mixer comprises an outer shell and an inner shell, the outer shell is axially penetrated, and the inner shell is embedded in the outer shell; an annular exhaust gas inlet channel is arranged between the inner wall of the outer shell and the outer wall of the inner shell; the inner shell is provided with an air inlet channel, a guide channel and a mixed gas outlet channel arranged in sequence along the axial direction; The guide channel is provided with a guide support wing, and the guide support wing divides the guide channel into a plurality of guide branch channels arranged at intervals; A first exhaust gas diversion channel connected to the exhaust gas inlet channel is arranged in the guide support wing, and a first exhaust gas outlet connected to the first exhaust gas diversion channel is arranged at the end of the guide support wing; the first exhaust gas outlet is located at the end of the guide channel; The guide support wing comprises a plurality of support wings arranged crosswise; or, the guide support wing comprises a plurality of support wings arranged in parallel; A second exhaust gas outlet is also provided at the end of the guide channel, and a second exhaust gas diversion channel is provided between the second exhaust gas outlet and the exhaust gas inlet channel; the second exhaust gas outlet is located radially outside the first exhaust gas outlet and the guide branch channel; The second exhaust gas diversion channel is located radially outside the guide channel, a connecting diffusion channel is arranged between the end of the guide channel and the front end of the mixed gas outlet channel, the second exhaust gas outlet is arranged on the inner side wall of the connecting diffusion channel, and the second exhaust gas diversion channel is formed on the outer side wall of the inner shell, so that the second exhaust gas outlet includes a plurality of arc-shaped exhaust gas outlets arranged at intervals along the circumferential direction; or, the second exhaust gas diversion channel is located radially inside the guide channel, the second exhaust gas diversion channel is connected to the first exhaust gas diversion channel, and the second exhaust gas outlet includes a circular exhaust gas outlet.

2. The internal combustion engine gas mixer according to claim 1, characterized in that: The plurality of support wings are arranged crosswise in a radial manner; or, the plurality of support wings are arranged crosswise in a matrix manner.

3. The internal combustion engine gas mixer according to claim 1, wherein: The first exhaust gas outlet and the plurality of arc-shaped exhaust gas outlets are arranged alternately along the circumferential direction.

4. The internal combustion engine gas mixer according to claim 1, characterized in that: An exhaust gas diffusion section is arranged in the first exhaust gas guiding channel.

5. The internal combustion engine gas mixer according to claim 1, characterized in that: A conical air outlet guide body extending into the mixed air outlet channel is arranged at the end of the guide support wing, and the conical air outlet guide body is coaxially arranged with the guide channel; the conical air outlet guide body is a solid structure; or, an exhaust gas diversion branch channel connected to the first exhaust gas diversion channel is arranged in the conical air outlet guide body, and a third exhaust gas outlet connected to the exhaust gas diversion branch channel is arranged at the end of the conical air outlet guide body.

6. The internal combustion engine gas mixer according to claim 1, characterized in that: The side wall of the guide support wing is provided with an exhaust gas seepage port, and the exhaust gas seepage port is communicated with the first exhaust gas guide channel and the guide branch channel respectively.

7. The internal combustion engine gas mixer according to claim 1, characterized in that: The air inlet channel comprises an air inlet convergence channel formed by an annular cone surface, and the cone angle of the annular cone surface is 28-36 degrees.

8. The internal combustion engine gas mixer according to claim 1, characterized in that: The front end of the guide support wing is provided with a conical air intake guide body extending into the air intake channel; and / or the front end of the guide support wing is provided with an air intake dividing surface.

9. The internal combustion engine gas mixer according to claim 1, characterized in that: The mixed gas outlet passage comprises a mixed gas outlet diffusion passage, and the front end of the mixed gas outlet diffusion passage is connected to the end of the guide passage.

10. The internal combustion engine gas mixer according to claim 1, characterized in that: The mixer is also provided with a gas inlet channel connected with the air inlet channel or the guide channel.

11. The internal combustion engine gas mixer according to claim 1, characterized in that: A drainage channel communicating with the exhaust gas inlet channel is arranged at the end of the mixed gas outlet channel.

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