Gas mixer of internal combustion engine

Abstract

The invention discloses a gas mixer of an internal combustion engine, and relates to the technical field of gas mixers. According to the technical scheme, the device comprises a waste gas inlet channel, an air inlet channel, a flow guide channel and a mixed gas outlet channel; flow guide supporting wings are arranged in the flow guide channel, and the flow guide channel is divided into a plurality of flow guide branch channels which are arranged at intervals by the flow guide supporting wings; a first waste gas drainage channel communicated with the waste gas inlet channel is formed in the flow guide supporting wing, and a first waste gas outlet communicated with the first waste gas drainage channel is formed in the tail end of the flow guide supporting wing; the first waste gas outlet is located at the tail end of the flow guide channel. Waste gas flow and air-fuel mixed gas flow are mixed in a crossed surrounding mode, the mixing uniformity and the mixing speed can be improved, the waste gas circulation effect can be improved, the introduction resistance of waste gas can be reduced, the introduction amount of the waste gas can be increased, and therefore the higher power density of an engine is achieved, and comprehensive gas consumption is reduced.

Description

Technical Field

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

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

[0003] The existing Chinese patent with publication number CN115244292A discloses a passive pumping for recirculating exhaust gas, 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 a fluid-connected air-exhaust gas inlet to receive a fluid flow from the corresponding converging nozzle and the inside of the exhaust gas housing.

[0004] However, the mixer in the above patent still has the following problems: (1) The air intake volume of the single air-exhaust gas inlet is small, and the gas mixing uniformity is insufficient, which affects the exhaust gas circulation effect; (2) When the engine is at high speed, the intake resistance is large, which increases fuel gas consumption; when the engine is at low speed, the exhaust gas introduction capacity is insufficient, which affects engine emissions and gas consumption; (3) The special-shaped curve structure makes processing more difficult and the cost is higher. Summary of the invention

[0005] In view of the shortcomings of the prior art, the purpose of the present invention is to provide an internal combustion engine gas mixer, which can cross-mix the exhaust gas flow with the air-fuel mixed flow, thereby improving the mixing uniformity and mixing speed, improving the exhaust gas circulation effect, and reducing the exhaust gas introduction resistance and increasing the exhaust gas introduction amount, thereby achieving a higher power density of the engine and reducing the overall gas consumption.

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

[0007] A gas mixer for an internal combustion engine, wherein the mixer is provided with an exhaust gas inlet channel, and an air inlet channel, a flow guide channel and a mixed gas outlet channel arranged in sequence along the axial direction;

[0008] 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;

[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 air intake guide body extending into the air intake passage is arranged at the front end of the guide support wing; and / or an air intake dividing surface is arranged at the front end of the guide support wing.

[0023] Furthermore, 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.

[0024] Furthermore, a gas inlet channel connected to the air inlet channel or the guide channel is also provided in the mixer.

[0025] Furthermore, a drainage channel communicating with the exhaust gas inlet channel is provided at the end of the mixed gas outlet channel.

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

[0027] 1. The exhaust gas flow discharged from the first exhaust gas outlet is cross-mixed with the first mixed gas flow on the axial flow path, which is beneficial to improving the uniformity and speed of mixing, improving the exhaust gas circulation effect, and reducing the exhaust gas introduction resistance and increasing the exhaust gas introduction amount, 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 with the first mixed gas flow, thereby further improving the mixing uniformity and mixing speed, and further reducing the exhaust gas introduction resistance and increasing the exhaust gas introduction amount;

[0029] 3. The third exhaust gas outlet is used to further reduce the exhaust gas introduction resistance and increase the exhaust gas introduction amount;

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

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

[0032] 6. Simple structure, which can reduce processing difficulty and production cost;

[0033] 7. The second mixed airflow diffuses directly without secondary convergence, which is beneficial to reducing the exhaust gas introduction resistance and increasing the exhaust gas introduction amount. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1The structure of the gas mixer of the internal combustion engine in Example 1 is shown in FIG. Figure 1 ;

[0035] Figure 2 The structure of the gas mixer of the internal combustion engine in Example 1 is shown in FIG. Figure 2 ;

[0036] Figure 3 The structure of the gas mixer of the internal combustion engine in Example 1 is shown in FIG. Figure 3 ;

[0037] Figure 4 The structure of the inner shell in Example 1 is shown in FIG. Figure 1 ;

[0038] Figure 5 The structure of the inner shell in Example 1 is shown in FIG. Figure 2 ;

[0039] Figure 6 The structure of the gas mixer of the internal combustion engine in Example 1 is shown in FIG. Figure 4 ;

[0040] Figure 7 The structure of the inner shell in Example 1 is shown in FIG. Figure 3 ;

[0041] Figure 8 The structure of the inner shell in Example 1 is shown in FIG. Figure 4 ;

[0042] Fig. 9 is a schematic diagram of the structure of the inner shell in Example 2;

[0043] Fig.10 This is a schematic diagram of the structure of the inner shell in Example 3;

[0044] Fig.11 The structure of the inner shell in Example 4 is shown in FIG. Figure 1 ;

[0045] Fig.12 The structure of the inner shell in Example 4 is shown in FIG. Figure 2 ;

[0046] Fig.13 The structure of the inner shell in Example 4 is shown in FIG. Figure 3 ;

[0047] Fig.14 The structure of the inner shell in Example 4 is shown in FIG. Figure 4 ;

[0048] Fig.15 The structure of the inner shell in Example 4 is shown in FIG. Figure 5 .

[0049] In the figure: 1. outer shell; 11. exhaust gas inlet channel entrance; 2. inner shell; 21. air inlet convergence channel; 211. gas inlet; 22. guide channel; 221. guide branch channel; 222. second exhaust gas diversion channel; 223. second exhaust gas outlet; 224. pressure detection port; 23. mixed gas diffusion channel; 231. drainage channel; 24. guide support wing; 241. first exhaust gas diversion channel; 2411. arc channel; 242. first exhaust gas outlet; 243. exhaust gas diffusion section; 244. exhaust gas seepage outlet; 245. air intake dividing surface; 25. conical intake guide body; 26. conical outlet guide body; 261. exhaust gas diversion branch channel; 262. third exhaust gas outlet; 27. connecting diffusion channel; 31. exhaust gas inlet channel; 32. annular pressure detection chamber; 33. gas inlet channel; 4. gas connector; 5. pressure sensor. DETAILED DESCRIPTION

[0050] The present invention is further described in detail below in conjunction with the accompanying drawings.

[0051] This specific embodiment is merely an explanation of the present invention and is not a limitation of the present invention. After reading this specification, those skilled in the art may make non-creative modifications to the present embodiment as needed. However, as long as they are within the scope of the claims of the present invention, they are protected by the patent law.

[0052] Embodiment 1:

[0053] A gas mixer for an internal combustion engine, 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 wall of the outer shell 1 and the outer wall of the inner shell 2, and an exhaust gas inlet channel inlet 11 connected to the exhaust gas inlet channel 31 is opened on the outer shell 1.

[0054] Reference Figures 1 to 8 In this embodiment, the interior of the inner shell 2 is provided with an air inlet channel, a guide channel 22 and a mixed air outlet channel arranged in sequence along the axial direction; in this embodiment, the air inlet channel includes an air inlet convergence channel 21 formed by an annular cone, and the cone angle of the annular cone is 28 to 36°; the cone angle of the annular cone is 28 to 36°, which is conducive to achieving rapid air convergence and acceleration, and can minimize the flow resistance; in this embodiment, the mixed air outlet channel includes a mixed air outlet diffusion channel 23 formed by an annular cone, and the guide channel 22 is a straight pipe channel; wherein, the end of the air inlet convergence channel 21 is connected with the front end of the guide channel 22, and a connecting diffusion channel 27 is provided between the end of the guide channel 22 and the front end of the mixed air outlet diffusion channel 23.

[0055] Reference Figures 1 to 8In this embodiment, a gas inlet channel 33 is further provided between the outer wall of the inner shell 2 and the inner wall of the outer shell 1, and a plurality of gas inlets 211 uniformly distributed along the circumferential direction are provided on the inner wall of the inner shell 2; a gas connector 4 is provided on the outer wall of the outer shell 1, and the gas connector 4 is connected to the gas inlet channel 33 for introducing gas; wherein, in this embodiment, the gas inlet 211 is respectively connected to the gas inlet channel 33 and the air inlet converging channel 21; that is, after the air enters the air inlet converging channel 21, it is mixed with the gas to form a first mixed airflow; connecting the gas inlet 211 with the air inlet converging channel 21 is conducive to the introduction and mixing of the high-pressure gas; in other optional embodiments, the gas inlet can also be connected to the guide channel 22 , which is conducive to the introduction of gas, and is not limited here; in this embodiment, a plurality of gas inlets 211 uniformly distributed along the circumferential direction are provided on the inner side wall of the inner shell 2, which is conducive to the rapid mixing of air and gas and improves the uniformity of mixing; in other optional embodiments, a gas introduction pipe can also be inserted into the air entry converging channel 21 or the guide channel 22 to achieve the introduction of gas, and is not limited here; wherein, the gas introduction pipe can also be inserted into the guide support wing; the mixer in this embodiment is used for three-medium mixing of air, gas and exhaust gas, and in other optional embodiments, it can also be used only for two-medium mixing of air and exhaust gas, and is not limited here; when used as a mixer for air and exhaust gas, it can be used for engines such as diesel engines.

[0056] Reference Figures 1 to 8 In this embodiment, an annular pressure detection chamber 32 is further provided between the outer wall of the inner shell 2 and the inner wall of the outer shell 1, and the inner wall of the inner shell 2 is provided with a plurality of pressure detection ports 224 uniformly distributed along the circumferential direction; one end of the pressure detection port 224 is connected to the diversion branch channel 221, and the other end is connected to the annular pressure detection chamber 32; a pressure sensor 5 is provided on the outer wall of the outer shell 1, and the detection end of the pressure sensor 5 extends into the annular pressure detection chamber 32 for detecting the air pressure in the diversion branch channel 221; the pressure detection port 224 cooperates with the annular pressure detection chamber 32, which is conducive 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] Reference Figures 1 to 8Preferably, in this embodiment, the inner side wall of the inner shell 2 is provided with a guide support wing 24 located in the guide channel 22, and the guide support wing 24 divides the guide channel 22 into a plurality of guide branch channels 221 arranged at intervals; in this embodiment, the guide support wing 24 includes a plurality of cross-arranged support wings, specifically, four support wings are cross-arranged in a radial radial shape, thereby dividing the guide channel 22 into four guide branch channels 221; specifically, in this embodiment, the guide support wing 24 includes a central axis and four support wings evenly distributed around the central axis; the radial inner end of the support wing is connected to the central axis, and the radial outer end Connected to the inner wall of the guide channel; in other optional embodiments, the central axis can also be eliminated, and the radial inner ends of multiple support wings can be directly connected together, which is not limited here; the guide channel 22 is a straight tube channel, and the separated guide branch channel 221 is a fan-shaped channel; of course, in other optional embodiments, the number of support wings in the guide support wing 24 can be adjusted as needed, and the cross-arrangement method can also be adjusted, which is not limited here; in other optional embodiments, the guide support wing can also include multiple support wings arranged in parallel, or can include one support wing, which is not limited here.

[0058] Reference Figures 1 to 8 Specifically, in this embodiment, the front end of the guide support wing 24 is provided with a conical air inlet guide body 25 extending into the air inlet convergence channel 21, and the end of the guide support wing 24 is provided with a conical air outlet guide body 26 extending into the mixed air outlet diffusion channel 23; the conical air inlet guide body 25, the air inlet convergence channel 21, the guide channel 22 and the conical air outlet guide body 26 are coaxially arranged; the conical air inlet guide body 25 is adopted to effectively shorten the gas convergence distance without increasing the convergence angle, thereby achieving rapid convergence while maintaining the optimal convergence angle; the conical air outlet guide body 26 is a solid structure, which is conducive to achieving rapid diffusion of the second mixed airflow.

[0059] Reference Figures 1 to 8 In this embodiment, a first exhaust gas diversion channel 241 communicating with the exhaust gas inlet channel 31 is arranged in the guide support wing 24; the first exhaust gas diversion channel 241 passes through the side wall of the inner shell 2, thereby communicating with the exhaust gas inlet channel 31; that is, in this embodiment, the guide support wing 24 is a hollow structure, and the first exhaust gas diversion channel 241 is a cross channel; the guide support wing 24 is provided with a first exhaust gas outlet 242 communicating with the first exhaust gas diversion channel 241 at the end, and the first exhaust gas outlet 242 is located at the end of the guide channel 22.

[0060] Reference Figures 1 to 8A low pressure is formed at the end of the guide channel 22, and the exhaust gas in the exhaust gas inlet channel 31 is sucked into the first exhaust gas guide channel 241 through the low pressure, and then discharged through the first exhaust gas outlet 242; the first mixed airflow enters the four guide branch channels 221 respectively, and then is discharged from the end of the guide branch channel 221; the exhaust flow is mixed with the first mixed airflow to form a second mixed airflow, and the second mixed airflow enters the mixed outlet diffusion channel 23, and then is discharged through the mixed outlet diffusion channel 23.

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

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

[0063] Reference Figures 1 to 8 Preferably, an exhaust gas diffusion section 243 is provided 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; an exhaust gas diffusion section 243 is provided in the first exhaust gas diversion channel 241, which can further reduce the exhaust gas introduction resistance and increase the exhaust gas introduction amount.

[0064] Reference Figures 1 to 8 Preferably, in this embodiment, a second exhaust gas outlet 223 is also provided at the end of the guide channel 22; the second exhaust gas outlet 223 is located radially outside the first exhaust gas outlet 242 and the guide branch channel 221; the exhaust gas flow discharged from the second exhaust gas outlet 223 surrounds the first mixed gas flow, and the exhaust gas flow discharged from the first exhaust gas outlet 242 is cross-mixed with the first mixed gas flow, forming a cross-surrounding mixing of the exhaust gas flow with the first mixed gas flow, thereby further improving the uniformity and mixing speed of the mixing, and further reducing the exhaust gas introduction resistance and increasing the exhaust gas introduction amount.

[0065] Reference Figures 1 to 8 In this embodiment, the second exhaust gas guide channel 222 is located on the radial outer side of the guide channel 22, and the second exhaust gas outlet 223 is arranged 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 is beneficial to reducing the flow resistance of the mixed airflow; specifically, the second exhaust gas guide 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 along 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 staggered along the circumferential direction, and the four arc-shaped exhaust gas outlets of the second exhaust gas outlet 223 are respectively located on the radial outer sides of the ends of the four guide branch channels 221, which can improve the uniformity and mixing speed of mixing, reduce the introduction resistance of the exhaust gas, and increase the introduction amount of the exhaust gas.

[0066] Reference Figures 1 to 8 Preferably, in this embodiment, the inner side wall of the end of the mixed gas diffusion channel 23 is provided with a drainage channel 231 connected to the exhaust gas inlet channel 31, and 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 hindering the connection between the exhaust gas drainage channel and the exhaust gas inlet channel.

[0067] Embodiment 2:

[0068] A gas mixer for an internal combustion engine, referring to Figures 1 to 9 Based on Example 1, the difference between this embodiment and Example 1 is that: in this embodiment, an exhaust gas diversion branch channel 261 connected to the first exhaust gas diversion channel 241 is provided in the conical exhaust gas outlet guide body 26, and a third exhaust gas outlet 262 connected to the exhaust gas diversion branch channel 261 is provided at the end of the conical exhaust gas outlet guide body 26; the use of the third exhaust gas outlet 262 is conducive to further reducing the exhaust gas introduction resistance and increasing the exhaust gas introduction amount; in other optional embodiments, the conical exhaust gas outlet guide body 26 can also be cancelled, so that the first exhaust gas outlet 242 is a cross-through outlet, which is not limited here.

[0069] Embodiment 3:

[0070] A gas mixer for an internal combustion engine, referring to Figures 1 to 10 Based on Example 2, the difference between this example and Example 2 is that: in this example, the side wall of the guide support wing 24 is provided with a plurality of exhaust gas infiltration ports 244, and the exhaust gas infiltration ports 244 are respectively connected to the first exhaust gas diversion channel 241 and the guide branch channel 221; the use of the exhaust gas infiltration ports 244 is conducive to further reducing the exhaust gas introduction resistance, increasing the exhaust gas introduction amount, and improving the mixing uniformity.

[0071] Embodiment 4:

[0072] A gas mixer for an internal combustion engine, referring to Figures 1 to 15 , based on Example 1, the difference between this embodiment and Example 1 is that: in this embodiment, the guide support wing 24 includes a plurality of cross-arranged support wings, but the cross-arrangement method is different from that in Example 1. In this embodiment, the plurality of support wings are arranged vertically and cross-wise in a matrix; specifically, in this embodiment, the guide support wing 24 includes a longitudinal support wing, and two transverse support wings perpendicularly intersecting the longitudinal support wing, and the two transverse support wings are arranged in parallel; then, the guide support wing 24 in this embodiment divides the guide channel 22 into six guide branch channels 221; of course, in other optional embodiments, the number of longitudinal support wings and transverse support wings can be adjusted as needed, without limitation herein, such as two longitudinal support wings and two transverse support wings.

[0073] Reference Figures 1 to 15 In this embodiment, the conical air inlet guide body 25 is eliminated at the front end of the guide support wing 24, but an air inlet dividing surface 245 is provided at the front end of the guide support wing 24; the use of the air inlet dividing surface 245 can effectively shorten the gas convergence distance.

[0074] Reference Figures 1 to 15 In this embodiment, the second exhaust gas diversion channel 222 is located on the radial inner side of the guide channel 22, and the second exhaust gas diversion channel 222 is connected to 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 a circular exhaust gas outlet; and the second exhaust gas outlet 223 is connected to the first exhaust gas outlet 242; in this embodiment, the first exhaust gas diversion channel 241 passes through the side wall of the inner shell 2, so as to be connected to the exhaust gas inlet channel 31; preferably, the first exhaust gas diversion channel 241 extends circumferentially at the through opening of the side wall of the inner shell 2 to form an arc channel 24 11, the arc channel 2411 is connected with the second exhaust gas diversion channel 222; that is, in this embodiment, the arc channel 2411 is respectively connected with the first exhaust gas diversion channel 241 and the second exhaust gas diversion channel 222, and the arc channel 2411 is connected with the exhaust gas inlet channel 31, so as to realize the introduction of exhaust gas; preferably, the side wall of the inner shell 2 is respectively provided with arc channels 2411 at two positions along the axial direction, and each position is provided with a plurality of arc channels 2411 arranged along the circumferential direction, so as to ensure the smooth introduction of exhaust gas; the use of the arc channel 2411 can also make the inner shell 2 adopt an integrated structure, so as to facilitate processing and assembly.

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

Claims

1. A gas mixer for an internal combustion engine, characterized in that: The mixer is provided with an exhaust gas inlet channel, and an air inlet channel, a flow 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.

2. The internal combustion engine gas mixer according to claim 1, characterized in that: 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.

3. The internal combustion engine gas mixer according to claim 2, characterized in that: The plurality of support wings are cross-arranged in a radially radiating manner; Alternatively, the plurality of support wings are arranged vertically and crosswise in a matrix.

4. The internal combustion engine gas mixer according to claim 1, characterized in that: 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.

5. The internal combustion engine gas mixer according to claim 4, characterized in that: The second exhaust gas outlet includes a plurality of arc-shaped exhaust gas outlets spaced apart along the circumferential direction; or, the second exhaust gas outlet includes a circular ring-shaped exhaust gas outlet.

6. The internal combustion engine gas mixer according to claim 5, characterized in that: The first exhaust gas outlet and the plurality of arc-shaped exhaust gas outlets are arranged alternately along the circumferential direction.

7. The internal combustion engine gas mixer according to claim 4, characterized in that: 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; Alternatively, the second exhaust gas guiding channel is located radially inward of the guiding channel, and the second exhaust gas guiding channel is communicated with the first exhaust gas guiding channel.

8. 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.

9. The internal combustion engine gas mixer according to claim 1, characterized in that: The end of the guide support wing is provided with a conical air outlet guide body extending into the mixed air outlet channel, 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, 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.

10. 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.

11. 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.

12. 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.

13. 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.

14. 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.

15. 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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