Exhaust assembly and vehicle
By designing the exhaust components of the detachable connected exhaust branch and independent exhaust passage, the problem of interference between the exhaust gases of each cylinder in the engine is solved, and the effect of optimizing combustion and improving power performance is achieved.
Patent Information
- Application Number
- CN202421250744.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-03
- Publication Date
- 2025-02-18
- Estimated Expiration
- 2034-06-03
AI Technical Summary
The cylinders in existing engines interfere with each other when exhausting, resulting in poor exhaust gas, and thus deteriorating combustion and premature combustion problems, affecting the power of the engine.
An exhaust assembly is designed, including a first exhaust branch and a second exhaust branch that can be detachably connected, forming a first exhaust passage and a second exhaust passage independent from each other, and alternately connecting each cylinder to realize adjacent ignition sequence independent exhaust of two cylinders.
Eliminate interference from the exhaust gases of two cylinders in adjacent ignition sequences, optimize combustion, improve engine power performance, and improve exhaust manifold compactness and production efficiency by reducing the number and length of connected parts.
Smart Images
Figure CN222501864U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of engine exhaust, in particular to an exhaust component and a vehicle. Background Art
[0002] The exhaust manifold is connected to the engine cylinder block, and collects the exhaust gas from each cylinder and guides it into the exhaust manifold with divergent pipes. The function of the exhaust manifold is to discharge the exhaust gas in the combustion chamber. The higher the efficiency of exhaust gas discharge, the more fresh air can be inhaled in the next combustion cycle. Limited by the structure of the existing exhaust manifold, the exhaust between the cylinders will interfere with each other. The exhaust pulse of the latter cylinder will make the exhaust gas of the previous cylinder not discharged cleanly, and even cause the exhaust gas to enter the previous cylinder, causing the engine to exhaust poorly, and then there will be problems such as poor combustion and pre-ignition, affecting the power of the engine. Utility Model Content
[0003] The main purpose of the utility model is to provide an exhaust component and a vehicle, aiming to solve the technical problem that the cylinders in the existing engine interfere with each other during exhaust.
[0004] To achieve the above-mentioned purpose, an embodiment of the utility model proposes an exhaust component, which is applied to an engine, and the engine has a plurality of cylinders arranged in sequence, and the exhaust component includes an exhaust manifold, and the exhaust manifold includes a first exhaust branch pipe and a second exhaust branch pipe that are detachably connected, the first exhaust branch pipe is provided with a first exhaust sub-flow channel, and the second exhaust branch pipe is provided with a second exhaust sub-flow channel and a second exhaust channel that are independent of each other, the first exhaust sub-flow channel and the second exhaust sub-flow channel are connected to form a first exhaust channel, the first exhaust channel and the second exhaust channel are independently arranged, a part of the plurality of cylinders are connected to the first exhaust channel, and another part of the plurality of cylinders are connected to the second exhaust channel, and the cylinders connected to the first exhaust channel and the cylinders connected to the second exhaust channel are ignited alternately.
[0005] In an embodiment of the present utility model, the first exhaust branch pipe and the second exhaust branch pipe are sleeved.
[0006] In one embodiment of the utility model, the first exhaust branch pipe and the second exhaust branch pipe are respectively provided with an air intake port, the air intake port corresponds to the cylinder one by one, the cylinder is connected with the corresponding first exhaust channel or the second exhaust channel through the air intake port, the second exhaust branch pipe is provided with a first exhaust port connected with the second exhaust sub-channel and a second exhaust port connected with the second exhaust channel, and the first exhaust port and the second exhaust port are arranged close to each other;
[0007] A plane perpendicular to the length direction of the exhaust manifold and passing through the collective center of the first exhaust port and the second exhaust port is a reference plane, and the numbers of the air intake ports located on opposite sides of the reference plane are different.
[0008] In an embodiment of the present invention, a distance between two of the air inlets close to each other in the second exhaust sub-channel and the second exhaust channel is smaller than a distance between other two adjacent air inlets.
[0009] In an embodiment of the present invention, the wall thickness of two of the air inlets close to each other in the second exhaust sub-flow channel and the second exhaust channel is greater than the wall thickness of the other air inlets.
[0010] In one embodiment of the utility model, the exhaust manifold is also provided with a first air intake sub-port and a second air intake sub-port which are independent of each other, the first air intake sub-port is connected to the first exhaust channel, the second air intake sub-port is connected to the second exhaust channel, and the first air intake sub-port and the second air intake sub-port are both arranged on the side of the exhaust manifold facing away from the ground.
[0011] In one embodiment of the utility model, the exhaust component also includes an air intake pipe, which has a first air intake channel and a second air intake channel that are independent of each other, the first air intake channel is connected to the first air intake sub-port, and the second air intake channel is connected to the second air intake sub-port.
[0012] In an embodiment of the present invention, the air intake pipe further comprises an air intake collecting channel, and the first air intake channel and the second air intake channel are collected and connected to the air intake collecting channel.
[0013] In one embodiment of the utility model, the air intake pipe includes a first air intake sub-tube, a second air intake sub-tube and an elastic connecting part connecting the first air intake sub-tube and the second air intake sub-tube, the first air intake sub-tube has the first air intake channel, the second air intake channel and the air intake collecting channel, and the air intake collecting channel and the second air intake sub-tube are connected through the elastic connecting part.
[0014] In one embodiment of the utility model, the air extraction pipe also includes an extension portion, one end of which is connected to the first air extraction sub-tube, and the other end of which passes through the elastic connecting portion and extends to the interior of the second air extraction sub-tube, and the extension portion is spaced apart from the inner wall of the elastic connecting portion.
[0015] In an embodiment of the utility model, the exhaust assembly further includes a heat insulation structure, and the heat insulation structure is provided outside the exhaust manifold and / or the air intake pipe.
[0016] In an embodiment of the present invention, the heat insulation structure includes a heat insulation cover and a heat insulation filler arranged inside the heat insulation cover.
[0017] In an embodiment of the present utility model, the surface of the first exhaust branch pipe and / or the second exhaust branch pipe is provided with reinforcing ribs.
[0018] In one embodiment of the present invention, the engine is a methanol fuel engine.
[0019] To achieve the above objectives, an embodiment of the present invention provides a vehicle, which includes the exhaust assembly described above.
[0020] Compared with the prior art, in a technical solution proposed by the utility model, by setting a first exhaust channel and a second exhaust channel that are independent of each other, two cylinders in adjacent ignition sequences can be connected to different exhaust channels, that is, the multiple cylinders connected to the first exhaust channel and the multiple cylinders connected to the second exhaust channel are ignited alternately, realizing the independent exhaust of the two cylinders in adjacent ignition sequences, eliminating the interference phenomenon of the exhaust of the two cylinders in adjacent ignition sequences, and optimizing the combustion; at the same time, more frequent exhaust pulses can be generated, which is conducive to the increase of the supercharger speed, thereby effectively improving the power performance of the engine. In addition, the exhaust manifold in this embodiment includes a first exhaust branch pipe and a second exhaust branch pipe that can be detachably connected, the first exhaust sub-flow channel in the first exhaust branch pipe and the second exhaust sub-flow channel in the second exhaust branch pipe together form a first exhaust channel, and the second exhaust branch pipe has a second exhaust channel. That is to say, the technical solution of this embodiment, based on the dual-flow channel structure, designs the entire exhaust manifold into two sections. Compared with the three-section or four-section design, the number of connecting parts between the sections is reduced, and the superposition length of the connecting parts is reduced, so that the overall length of the exhaust manifold can be designed to be shorter, further improving the compactness of the structure and meeting the requirements of lightweight design. Moreover, it is more convenient to produce, more efficient and less costly. BRIEF DESCRIPTION OF THE DRAWINGS
[0021] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.
[0022] Figure 1 This is a schematic diagram of the structure of an embodiment of the exhaust assembly of the utility model (applied to a six-cylinder engine);
[0023] Figure 2It is a cross-sectional structural schematic diagram of an embodiment of the exhaust assembly of the utility model (applied to a six-cylinder engine);
[0024] Figure 3 It is another cross-sectional structural schematic diagram of an embodiment of the exhaust assembly of the utility model (applied to a six-cylinder engine);
[0025] Figure 4 It is a partial structural schematic diagram of an embodiment of the exhaust assembly of the utility model (applied to a six-cylinder engine).
[0026] Description of Figure Numbers:
[0027] 10. First exhaust branch pipe; 11. First exhaust sub-channel; 20. Second exhaust branch pipe; 21. Second exhaust sub-channel; 22. Second exhaust channel; 30. Air inlet; 41. First exhaust port; 42. Second exhaust port; 60. Air intake pipe; 61. First air intake sub-pipe; 611. First air intake channel; 612. Second air intake channel; 613. Air intake aggregation channel; 62. Second air intake sub-pipe; 63. Elastic connecting portion; 64. Extension portion; 70. Thermal insulation structure.
[0028] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION
[0029] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the embodiments of the utility model.
[0030] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.
[0031] In addition, in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the embodiments of the present invention, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.
[0032] In the embodiments of the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" 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, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present invention can be understood according to specific circumstances.
[0033] In addition, the technical solutions between the various embodiments of the present utility model can be combined with each other, but it must be based on the fact that ordinary technicians in this field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the embodiments of the present utility model.
[0034] The exhaust manifold is connected to the engine cylinder block, and collects the exhaust gas from each cylinder and guides it into the exhaust manifold with divergent pipes. Limited by the structure of the existing exhaust manifold, the exhaust gas between the cylinders will interfere with each other. The exhaust pulse of the latter cylinder will make the exhaust gas of the former cylinder not exhaust cleanly, and even cause the exhaust gas to enter the former cylinder, causing the engine to exhaust poorly, and then causing problems such as poor combustion and pre-ignition, affecting the power of the engine.
[0035] In view of this, an embodiment of the utility model provides an exhaust assembly and a vehicle, wherein the exhaust manifold includes a first exhaust branch pipe and a second exhaust branch pipe that can be detachably connected, the first exhaust sub-flow channel in the first exhaust branch pipe and the second exhaust sub-flow channel in the second exhaust branch pipe together form a first exhaust channel, and the second exhaust branch pipe has a second exhaust channel. In other words, the technical solution of this embodiment designs the entire exhaust manifold into a two-stage structure based on the use of a dual-flow channel structure, and the overall length can be designed to be shorter, further improving the compactness and meeting the requirements of lightweight design. Moreover, it is more convenient to produce, more efficient, and less costly.
[0036] In order to better understand the above technical solution, the above technical solution is described in detail below with reference to the accompanying drawings.
[0037] like Figure 1 and Figure 2, as shown, an embodiment of the utility model proposes an exhaust assembly, which is applied to an engine. The engine has a plurality of cylinders arranged in sequence, and the exhaust assembly includes an exhaust manifold. The exhaust manifold includes a first exhaust branch pipe 10 and a second exhaust branch pipe 20 that are detachably connected. The first exhaust branch pipe 10 is provided with a first exhaust sub-flow channel 11, and the second exhaust branch pipe 20 is provided with a second exhaust sub-flow channel 21 and a second exhaust channel 22 that are independent of each other. The first exhaust sub-flow channel 11 and the second exhaust sub-flow channel 21 are connected to form a first exhaust channel. The first exhaust channel and the second exhaust channel 22 are independently arranged. A part of the plurality of cylinders is connected to the first exhaust channel, and another part of the plurality of cylinders is connected to the second exhaust channel 22. The cylinders connected to the first exhaust channel and the cylinders connected to the second exhaust channel 22 are ignited alternately.
[0038] In the technical solution adopted in this embodiment, by setting a first exhaust channel and a second exhaust channel 22 that are independent of each other, two cylinders of adjacent ignition sequences can be connected to different exhaust channels, that is, the multiple cylinders connected to the first exhaust channel and the multiple cylinders connected to the second exhaust channel 22 are ignited alternately, realizing the independent exhaust of two cylinders of adjacent ignition sequences, eliminating the interference phenomenon of the exhaust of two cylinders of adjacent ignition sequences, and optimizing combustion; at the same time, more frequent exhaust pulses can be generated, which is conducive to the increase of the supercharger speed, thereby effectively improving the power performance of the engine. In addition, the exhaust manifold in this embodiment includes a first exhaust branch pipe 10 and a second exhaust branch pipe 20 that can be detachably connected, the first exhaust sub-flow channel 11 in the first exhaust branch pipe 10 and the second exhaust sub-flow channel 21 in the second exhaust branch pipe 20 together form a first exhaust channel, and the second exhaust branch pipe 20 has a second exhaust channel 22. That is to say, the technical solution of this embodiment, on the basis of adopting the dual-flow channel structure, designs the entire exhaust manifold into two sections. Compared with the three-section or four-section design, the number of connecting parts between the sections is reduced, and the superposition length of the connecting parts is reduced, so that the overall length of the exhaust manifold can be designed to be shorter, further improving the compactness of the structure and meeting the requirements of lightweight design. Moreover, it can reduce the difficulty of manufacturing, ensure the strength of parts, make production more convenient, more efficient and less costly.
[0039] It should be pointed out that the exhaust assembly proposed in this embodiment can be applied to a four-cylinder engine or a six-cylinder engine. When the exhaust assembly is applied to a four-cylinder engine, the engine is provided with a first cylinder, a second cylinder, a third cylinder and a fourth cylinder from the front end to the rear end, wherein the first exhaust channel connects the first cylinder and the second cylinder, and the second exhaust channel 22 connects the third cylinder and the fourth cylinder; when the exhaust assembly is applied to a six-cylinder engine, the engine is provided with a first cylinder, a second cylinder, a third cylinder, a fourth cylinder, a fifth cylinder and a sixth cylinder from the front end to the rear end, wherein the first exhaust channel connects the first cylinder, the second cylinder and the third cylinder, and the second exhaust channel 22 connects the fourth cylinder, the fifth cylinder and the sixth cylinder.
[0040] In one embodiment of the utility model, the first exhaust branch pipe 10 and the second exhaust branch pipe 20 are sleeved. It is understandable that the first exhaust branch pipe 10 and the second exhaust branch pipe 20 are sleeved at one end close to each other, which can facilitate the connection of the first exhaust branch pipe 10 and the second exhaust branch pipe 20 and further improve the convenience of production. In one embodiment, the first exhaust branch pipe 10 can be sleeved on the outside of the second exhaust branch pipe 20, or the second exhaust branch pipe 20 can be sleeved on the outside of the first exhaust branch pipe 10, which is not limited here. As an optional method, the first exhaust branch pipe 10 and the second exhaust branch pipe 20 are interference fit, which can improve the sealing of the connection between the first exhaust branch pipe 10 and the second exhaust branch pipe 20 and prevent air leakage. Of course, a sealing ring can also be provided at the connection between the first exhaust branch pipe 10 and the second exhaust branch pipe 20, which can also improve the sealing performance, which is not limited here.
[0041] In one embodiment of the present invention, referring to Figure 2 The first exhaust branch pipe 10 and the second exhaust branch pipe 20 are respectively provided with an air inlet 30, and the air inlet 30 corresponds to the cylinder one by one. The cylinder is connected with the corresponding first exhaust channel or second exhaust channel 22 through the air inlet 30. The second exhaust branch pipe 20 is provided with a first exhaust port 41 connected with the second exhaust sub-flow channel 21 and a second exhaust port 42 connected with the second exhaust channel 22. The first exhaust port 41 and the second exhaust port 42 are arranged close to each other.
[0042] A plane perpendicular to the length direction of the exhaust manifold and passing through the collective center of the first exhaust port 41 and the second exhaust port 42 is a reference plane, and the numbers of the air intake ports 30 located on opposite sides of the reference plane are different.
[0043] It is understandable that each cylinder is provided with an air inlet 30. Since the supercharger is arranged in the middle and rear section of the engine, the number of air inlets 30 located on opposite sides of the reference plane is different, so that the first exhaust port 41 and the second exhaust port 42 are located in the middle and rear section of the engine, which is convenient for connection with the supercharger, and reduces the length of the connecting pipeline between the first exhaust port 41 or the second exhaust port 42 and the supercharger. When the exhaust assembly is applied to a four-cylinder engine, the first exhaust port 41 and the second exhaust port 42 are arranged between the third cylinder and the fourth cylinder; when the exhaust assembly is applied to a six-cylinder engine, the first exhaust port 41 and the second exhaust port 42 are arranged between the fourth cylinder and the fifth cylinder.
[0044] In one embodiment of the utility model, the distance between two air inlets 30 close to each other in the second exhaust sub-flow channel 21 and the second exhaust channel 22 is smaller than the distance between other two adjacent air inlets 30. In this way, the path from the air inlets 30 far from one end of each other in the second exhaust sub-flow channel 21 and the second exhaust channel 22 to the first exhaust port 41 or the second exhaust port 42 is shortened, thereby shortening the difference in the distance between each air inlet 30 and the first exhaust port 41 or the second exhaust port 42, and improving the uniformity of the length of each air inlet 30 to the first exhaust port 41 or the second exhaust port 42. When the exhaust assembly is applied to a four-cylinder engine, the distance between the second air inlet 30 corresponding to the second cylinder and the third air inlet 30 corresponding to the third cylinder is smaller; when the exhaust assembly is applied to a six-cylinder engine, the distance between the third air inlet 30 corresponding to the third cylinder and the fourth air inlet 30 corresponding to the fourth cylinder is smaller.
[0045] In one embodiment of the utility model, the wall thickness of the two air inlets 30 close to each other in the second exhaust sub-channel 21 and the second exhaust channel 22 is greater than the wall thickness of the other air inlets 30. Since the distance between the two air inlets 30 close to each other in the second exhaust sub-channel 21 and the second exhaust channel 22 is smaller than the distance between the other two adjacent air inlets 30, that is, the distance between the two air inlets 30 close to each other in the second exhaust sub-channel 21 and the second exhaust channel 22 is closer, heat crosstalk may be generated during exhaust. For this reason, the wall thickness of the two air inlets 30 close to each other in the second exhaust sub-channel 21 and the second exhaust channel 22 is greater than the wall thickness of the other air inlets 30, which can withstand a greater heat load, can reduce the heat crosstalk of the above-mentioned two air inlets 30 during exhaust, and ensure the smoothness of exhaust between each other.
[0046] In one embodiment of the utility model, the exhaust manifold is further provided with a first air intake sub-port and a second air intake sub-port which are independent of each other, the first air intake sub-port is connected to the first exhaust channel, the second air intake sub-port is connected to the second exhaust channel 22, and the first air intake sub-port and the second air intake sub-port are both arranged on the side of the exhaust manifold away from the ground. It can be understood that by providing the first air intake sub-port and the second air intake sub-port, it is possible to achieve separate air intake of the first exhaust channel and the second exhaust channel 22, and effectively improve the uniformity of air intake of each cylinder. In one embodiment, the first air intake sub-port and the second air intake sub-port are respectively connected to the EGR integrated exhaust gas recirculation system. Moreover, the first air intake port and the second air intake port are arranged at the top of the exhaust manifold, which can effectively reduce the distance between the first air intake port or the second air intake port and the filter auxiliary component.
[0047] In one embodiment of the present invention, referring to Figure 1 and Figure 3 The exhaust component also includes an air intake pipe 60, which has a first air intake channel 611 and a second air intake channel 612 that are independent of each other. The first air intake channel 611 is connected to the first air intake sub-port, and the second air intake channel 612 is connected to the second air intake sub-port.
[0048] In this embodiment, the air intake pipe 60 is provided to connect the first air intake port and the EGR and to connect the second air intake port and the EGR, thereby improving the convenience of connection. Moreover, the air intake pipe 60 has a first air intake channel 611 and a second air intake channel 612 that are independent of each other. The first air intake channel 611 is connected to the first air intake port, and the second air intake channel 612 is connected to the second air intake port. This can prevent the first air intake port and the second air intake port from interfering with each other during air intake, thereby improving the smoothness of air intake. In one embodiment, the air intake pipe 60 is connected to the exhaust manifold through a flange, and the flange is provided with a first connection hole corresponding to the first air intake port and a second connection hole corresponding to the second air intake port.
[0049] In one embodiment of the present invention, referring to Figure 3 and Figure 4 The air intake pipe 60 also has an air intake collection channel 613, and the first air intake channel 611 and the second air intake channel 612 are collected and connected to the air intake collection channel 613. Specifically, through the air intake collection channel 613, the gas can be collected on the side of the first air intake channel 611 and the second air intake channel 612 away from the first air intake port or the second air intake port, and transported to the EGR as a whole. It can be understood that the first air intake channel 611 and the second air intake channel 612 are arranged close to the first air intake port and the second air intake port, and the air intake collection channel 613 is arranged away from the first air intake port and the second air intake port, so as to achieve the purpose of independent air intake first and then collection and transportation.
[0050] In one embodiment of the present invention, referring to Figure 4The air intake pipe 60 includes a first air intake sub-tube 61, a second air intake sub-tube 62, and an elastic connection part 63 connecting the first air intake sub-tube 61 and the second air intake sub-tube 62. The first air intake sub-tube 61 has a first air intake channel 611, a second air intake channel 612, and an air intake summary channel 613. The air intake summary channel 613 and the second air intake sub-tube 62 are connected through the elastic connection part 63. In this way, by setting the elastic connection part 63, the assembly tolerance can be compensated and the vibration can be reduced. Optionally, the elastic connection part 63 is a bellows.
[0051] In one embodiment of the present invention, referring to Figure 4 The air intake pipe 60 further includes an extension portion 64, one end of which is connected to the first air intake sub-pipe 61, and the other end of which passes through the elastic connection portion 63 and extends to the inside of the second air intake sub-pipe 62, and the extension portion 64 is spaced from the inner wall of the elastic connection portion 63. In this way, the extension portion 64 can block the thermal impact of high-temperature exhaust gas on the thin-walled structure of the elastic connection portion 63, reduce the exhaust gas flow noise, and effectively improve the reliability of the parts.
[0052] In one embodiment of the present invention, referring to Figure 3 and Figure 4 The exhaust assembly also includes a heat insulation structure 70, and the heat insulation structure 70 is provided outside the exhaust manifold and / or the air intake pipe 60. The heat insulation structure 70 can be provided to thermally isolate the exhaust manifold and / or the air intake pipe 60 from other components, thereby preventing the hot gas in the exhaust manifold and / or the air intake pipe 60 from causing excessive temperature rise of other components.
[0053] In one embodiment of the present invention, the heat insulation structure 70 includes a heat insulation cover and a heat insulation filler disposed inside the heat insulation cover. Specifically, the heat insulation cover can be a stainless steel cover, and the heat insulation filler is heat insulation cotton. The double heat insulation of the heat insulation cover and the heat insulation cotton can effectively improve the heat insulation effect.
[0054] In an embodiment of the present invention, reinforcing ribs are provided on the surface of the first exhaust branch pipe 10 and / or the second exhaust branch pipe 20. Thus, the structural strength of the first exhaust branch pipe 10 and / or the second exhaust branch pipe 20 can be improved by providing the reinforcing ribs.
[0055] In one embodiment of the utility model, the engine is a methanol fuel engine. Methanol engines are different from traditional gasoline and diesel engines. Methanol fuel burns faster in the cylinder. When the chemical equivalent combustion route is adopted, the heat load of the exhaust manifold of the methanol engine is greater. Therefore, the exhaust assembly proposed by the utility model can effectively meet the above requirements.
[0056] To achieve the above purpose, the embodiment of the utility model provides a vehicle, which includes the exhaust assembly described above. Specifically, the specific structure of the exhaust assembly refers to the above embodiment. Since the vehicle adopts all the technical solutions of the above embodiment, it at least has all the beneficial effects brought by the technical solutions of the above embodiment, which will not be repeated here.
[0057] The above description is only an exemplary implementation of the present invention, and does not limit the patent scope of the embodiments of the present invention. All equivalent structural changes made by using the description and drawings of the embodiments of the present invention under the technical concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the embodiments of the present invention.
Claims
1. An exhaust assembly, applied to an engine, wherein the engine has a plurality of cylinders arranged in sequence, characterized in that: The exhaust assembly includes an exhaust manifold, and the exhaust manifold includes a first exhaust branch pipe and a second exhaust branch pipe that are detachably connected, the first exhaust branch pipe is provided with a first exhaust sub-flow channel, the second exhaust branch pipe is provided with a second exhaust sub-flow channel and a second exhaust channel that are independent of each other, the first exhaust sub-flow channel and the second exhaust sub-flow channel are connected to form a first exhaust channel, the first exhaust channel and the second exhaust channel are independently arranged, a part of the multiple cylinders are connected to the first exhaust channel, and another part of the multiple cylinders are connected to the second exhaust channel, and the cylinders connected to the first exhaust channel and the cylinders connected to the second exhaust channel are ignited alternately.
2. The exhaust assembly according to claim 1, characterized in that The first exhaust branch pipe and the second exhaust branch pipe are sleeved.
3. The exhaust assembly according to claim 1 or 2, characterized in that: The first exhaust branch pipe and the second exhaust branch pipe are respectively provided with an air inlet, the air inlet corresponds to the cylinder one by one, the cylinder is connected with the corresponding first exhaust channel or the second exhaust channel through the air inlet, the second exhaust branch pipe is provided with a first exhaust port connected with the second exhaust sub-channel and a second exhaust port connected with the second exhaust channel, the first exhaust port and the second exhaust port are arranged close to each other; A plane perpendicular to the length direction of the exhaust manifold and passing through the collective center of the first exhaust port and the second exhaust port is a reference plane, and the numbers of the air intake ports located on opposite sides of the reference plane are different.
4. The exhaust assembly according to claim 3, characterized in that A distance between two of the air inlets close to each other in the second exhaust sub-flow channel and the second exhaust channel is smaller than a distance between other two adjacent air inlets.
5. The exhaust assembly according to claim 4, characterized in that The wall thickness of two of the air inlets close to each other in the second exhaust sub-flow channel and the second exhaust passage is greater than the wall thickness of the other air inlets.
6. The exhaust assembly according to claim 1, wherein: The exhaust manifold is also provided with a first air intake port and a second air intake port which are independent of each other. The first air intake port is connected to the first exhaust channel, and the second air intake port is connected to the second exhaust channel. The first air intake port and the second air intake port are both provided on the side of the exhaust manifold facing away from the ground.
7. The exhaust assembly according to claim 6, characterized in that The exhaust assembly further includes an air intake pipe having a first air intake channel and a second air intake channel which are independent of each other, wherein the first air intake channel is communicated with the first air intake sub-port, and the second air intake channel is communicated with the second air intake sub-port.
8. The exhaust assembly according to claim 7, characterized in that The air intake pipe also has an air intake collecting channel, and the first air intake channel and the second air intake channel are collected and connected to the air intake collecting channel.
9. The exhaust assembly according to claim 8, characterized in that The air intake pipe includes a first air intake sub-tube, a second air intake sub-tube and an elastic connecting part connecting the first air intake sub-tube and the second air intake sub-tube. The first air intake sub-tube has the first air intake channel, the second air intake channel and the air intake collecting channel. The air intake collecting channel and the second air intake sub-tube are connected through the elastic connecting part.
10. The exhaust assembly of claim 9, wherein: The air extraction pipe also includes an extension portion, one end of which is connected to the first air extraction sub-tube, and the other end of which passes through the elastic connection portion and extends to the interior of the second air extraction sub-tube, and the extension portion is spaced apart from the inner wall of the elastic connection portion.
11. The exhaust assembly of claim 7, wherein: The exhaust assembly further comprises a heat insulation structure, and the heat insulation structure is arranged outside the exhaust manifold and / or the air intake pipe.
12. The exhaust assembly of claim 11, wherein: The heat insulation structure includes a heat insulation cover and a heat insulation filler arranged inside the heat insulation cover.
13. The exhaust assembly of claim 1, wherein: Reinforcing ribs are provided on the surface of the first exhaust branch pipe and / or the second exhaust branch pipe.
14. The exhaust assembly of claim 1, wherein: The engine is a methanol fuel engine.
15. A vehicle, characterized in that: The vehicle comprises an exhaust assembly as claimed in any one of claims 1 to 14.