Air inlet device of engine, engine and vehicle

Abstract

The utility model discloses an air inlet device of an engine, the engine and a vehicle, and relates to the technical field of vehicles. The air inlet device of the engine comprises a first pipeline, a silencer and a second pipeline, the silencer is connected between the first pipeline and the second pipeline, a silencing channel is formed in the silencer and communicated with the first pipeline and the second pipeline, the first pipeline is used for being communicated with an air filter of the engine, and the second pipeline is used for being communicated with an air inlet structure of the engine. An included angle beta is formed between the axis of the second pipeline and the vertical direction and meets the relational expression that beta is larger than or equal to 30 degrees and smaller than or equal to 40 degrees. Therefore, the silencer is connected between the first pipeline and the second pipeline, the air inlet device can be compact in structure, the integration level and the space utilization rate of the air inlet device can be improved, the included angle beta is formed between the axis of the outlet of the second pipeline and the vertical direction, air circulation can be smooth, kinetic energy loss of the air is reduced, and the air inlet device is more compact in structure. The air inlet efficiency of the engine is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicles, in particular to an air intake device of an engine, an engine and a vehicle. Background Art

[0002] In the related technology, the air intake device is an important part of the vehicle's air intake system. The air intake device can provide the engine with the air required for combustion. The air intake device has a complex structure and occupies too much layout space, which increases the difficulty of arranging vehicle components. In addition, the engine air intake is not smooth, which affects the engine's air intake efficiency. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, one purpose of the utility model is to provide an air intake device for an engine, which has a high degree of integration and a compact structure, and improves the air intake efficiency of the engine.

[0004] The utility model further provides an engine with the air intake device.

[0005] The utility model further provides a vehicle with the engine.

[0006] According to an embodiment of the utility model, the intake device of the engine includes: a first pipeline, a muffler and a second pipeline, the muffler is connected between the first pipeline and the second pipeline, the muffler forms a muffler channel, the muffler channel connects the first pipeline and the second pipeline, the first pipeline is used to communicate with the air filter of the engine, the second pipeline is used to communicate with the intake structure of the engine, the end of the second pipeline away from the muffler forms a second pipeline outlet, the axis of the second pipeline outlet forms an angle β with the vertical direction, and satisfies the relationship: 30°≤β≤40°.

[0007] According to the intake device of the engine of the embodiment of the utility model, by connecting the muffler between the first pipeline and the second pipeline, the structure of the intake device can be made compact, the integration degree and space utilization rate of the intake device can be improved, and the axis of the second pipeline outlet forms an angle β with the vertical direction. When the air flows from the second pipeline outlet to the intake structure, the air can flow smoothly, reducing the kinetic energy loss of the air, so as to improve the intake efficiency of the engine.

[0008] In some embodiments of the present invention, the second pipeline is configured to be arc-shaped.

[0009] In some embodiments of the present invention, a mounting end surface is formed on the outer surface of the muffler, an angle is formed between the mounting end surface and a horizontal plane, and the mounting end surface is assembled in cooperation with the first pipeline.

[0010] In some embodiments of the present utility model, an included angle α is formed between the installation end face and the horizontal plane, satisfying the relational expression: 120° ≤ α ≤ 130°.

[0011] In some embodiments of the present utility model, an installation arm protruding from the outer surface of the muffler is formed, and the installation arm is used for fixed assembly with the engine.

[0012] In some embodiments of the present utility model, the installation arm forms an installation hole and a positioning portion.

[0013] In some embodiments of the present utility model, the muffler further forms a plurality of connection channels, at least one of the plurality of connection channels is used for communicating with the crankcase ventilation pipe of the engine, at least one of the plurality of connection channels is used for communicating with the bypass valve of the engine, at least one of the plurality of connection channels is used for communicating with the fuel desorption pipe of the engine, and all the plurality of connection channels communicate with the sound absorption channel.

[0014] In some embodiments of the present utility model, the muffler includes: a housing and a muffler main body, the muffler main body is disposed inside the housing, the muffler main body forms the sound absorption channel and the plurality of connection channels, the housing forms a first interface, a second interface and a plurality of third interfaces, the sound absorption channel communicates the first interface and the second interface, the first interface communicates with the first pipeline, the second interface communicates with the second pipeline, and the plurality of third interfaces respectively communicate with the plurality of connection channels.

[0015] In some embodiments of the present utility model, a connection space is formed between the housing and the muffler main body, the connection channel communicating with the crankcase ventilation pipe and the corresponding third interface communicate through the connection space, and the housing forms a material storage tank, the material storage tank communicates with the connection space and is located below the connection space; a baffle structure is disposed in the connection space, and the baffle structure is fixedly disposed on the side wall of the connection space.

[0016] An engine according to an embodiment of the present utility model includes the intake device of the above-mentioned engine.

[0017] A vehicle according to an embodiment of the present utility model includes the engine according to the above.

[0018] Additional aspects and advantages of the present utility model will be given in part in the following description, become apparent in part from the following description, or be understood through the practice of the present utility model. Description of the Drawings

[0019] The above and / or additional aspects and advantages of the present utility model will become apparent and be readily understood from the following description of embodiments in conjunction with the accompanying drawings, where:

[0020] Figure 1 is a schematic diagram of an intake device according to an embodiment of the present utility model Figure 1 ;

[0021] Figure 2 is a schematic diagram of an intake device according to an embodiment of the present utility model Figure 2 ;

[0022] Figure 3 is a cross-section of an intake device according to an embodiment of the present utility model Figure 1 ;

[0023] Figure 4 is a cross-section of an intake device according to an embodiment of the present utility model Figure 2 .

[0024] Reference numerals:

[0025] First pipeline 1;

[0026] Second pipeline 2; Second pipeline outlet 21;

[0027] Muffler 3; Housing 31; First interface 311; Second interface 312; Third interface 313; Muffler main body 32; Sound absorption channel 321; Connection channel 322; Mounting arm 33; Mounting hole 331; Positioning part 332; Mounting end face 34; Connection space 35; Baffle structure 351; Connection flow channel 352; Substance storage tank 36;

[0028] Intake device 100. Detailed implementation manners

[0029] The embodiments of the present utility model will be described in detail below. Examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary only for explaining the present utility model and should not be construed as limiting the present utility model.

[0030] Reference will be made below to Figures 1 - 4 describe the intake device 100 of an engine according to an embodiment of the present utility model. The intake device 100 has a high degree of integration and a compact structure.

[0031] The intake device 100 of an engine according to an embodiment of the present utility model, as Figure 1 and Figure 2As shown in the figure, it includes: a first pipeline 1, a muffler 3, and a second pipeline 2. The muffler 3 is connected between the first pipeline 1 and the second pipeline 2. The muffler 3 is formed with a sound-absorbing channel 321. The sound-absorbing channel 321 communicates with the first pipeline 1 and the second pipeline 2. The first pipeline 1 is used to communicate with the air filter of the engine, and the second pipeline 2 is used to communicate with the intake structure of the engine. The end of the second pipeline 2 facing away from the muffler 3 forms a second pipeline outlet 21. The axis of the second pipeline outlet 21 forms an angle β with the vertical direction, satisfying the relationship: 30° ≤ β ≤ 40°.

[0032] Among them, the intake device 100 of the engine can provide fresh air for the engine. The intake device 100 includes a first pipeline 1, a muffler 3, and a second pipeline 2. One end of the first pipeline 1 communicates with the air filter. After the air is filtered by the air filter, it can enter the first pipeline 1. The other end of the first pipeline 1 communicates with the muffler 3. The muffler 3 is formed with a sound-absorbing channel 321. The air can flow from the first pipeline 1 into the sound-absorbing channel 321 of the muffler 3. The muffler 3 can reduce the noise of the intake device 100. The air can enter the second pipeline 2 through the muffler 3. The end of the second pipeline 2 facing away from the muffler 3 forms a second pipeline outlet 21. The second pipeline 2 can communicate with the intake structure of the engine. The intake structure can be a supercharger, a throttle valve, an intake manifold, etc. The air can enter the intake structure of the engine through the second pipeline outlet 21.

[0033] As some embodiments of the present invention, the first pipeline 1 and the muffler 3 can be connected by welding, clamping, band clamping, or bolt connection, etc. The second pipeline 2 and the muffler 3 can be connected by welding, clamping, or bolt connection.

[0034] The axis of the second pipeline outlet 21 forms an angle β with the vertical direction ( Figure 1 where the Z direction in the figure is the vertical direction), β satisfies the relationship: 30° ≤ β ≤ 40°. β can be, but is not limited to, 30°, 35°, or 40°, etc. After the second pipeline 2 is assembled with the intake structure, the set angle of the second pipeline outlet 21 can be adapted to the intake structure. When the air flows from the second pipeline outlet 21 to the intake structure, the air flow can be made smooth, which is convenient for the air to flow into the intake structure, is beneficial to reducing the kinetic energy loss of the air, is beneficial to the air and the exhaust gas to be mixed to form recirculated gas, and is also beneficial to improving the intake efficiency of the engine.

[0035] In the above embodiments, by connecting the muffler 3 between the first pipeline 1 and the second pipeline 2, the structure of the intake device 100 can be made compact, the integration degree and space utilization rate of the intake device 100 can be improved, and moreover, by forming an angle β between the axis of the second pipeline outlet 21 and the vertical direction, when the air flows from the outlet of the second pipeline 2 to the intake structure, the air flow can be made smooth, reducing the kinetic energy loss of the air to improve the intake efficiency of the engine.

[0036] In some embodiments of the present utility model, as Figures 1 - 3 shown, the second pipeline 2 is configured in an arc shape.

[0037] Among them, the second pipeline 2 can be configured in an arc shape. The second pipeline 2 can be configured in a circular arc structure. The arc-shaped second pipeline 2 can be connected to the intake structure, enabling air to flow smoothly in the second pipeline 2, reducing the probability of vortex or turbulence in the second pipeline 2, further reducing the kinetic energy loss when air flows in the second pipeline 2, facilitating the mixing of air and exhaust gas to form recirculated gas, so that the recirculated gas can have greater kinetic energy, and further improving the intake efficiency of the engine.

[0038] In some embodiments of the present utility model, as Figure 1 shown, an installation end face 34 is formed on the outer surface of the muffler 3. An angle is formed between the installation end face 34 and the horizontal plane, and the installation end face 34 is fitted with the first pipeline 1.

[0039] Among them, an installation end face 34 can be formed on the outer surface of the muffler 3 close to the first pipeline 1. The installation end face 34 can be used for fitting with the first pipeline 1, so that the muffler 3 and the first pipeline 1 are connected as a whole, and the muffler 3 and the first pipeline 1 can be communicated, enabling air to flow through the first pipeline 1 and the muffler 3 in sequence. An angle can be formed between the installation end face 34 and the horizontal plane to facilitate the fixed installation of the first pipeline 1 on the installation end face 34, reducing the installation difficulty of the muffler 3 and the first pipeline 1, and further improving the assembly efficiency of the intake device 100.

[0040] In some embodiments of the present utility model, as Figure 1 shown, an angle α is formed between the installation end face 34 and the horizontal plane, satisfying the relational expression: 120° ≤ α ≤ 130°.

[0041] Among them, an angle α can be formed between the installation end face 34 and the horizontal plane. The angle α satisfies the relational expression: 120° ≤ α ≤ 130°. The angle α can be, but is not limited to, 120°, 123°, 126°, or 130°, etc. By enabling an angle α to be formed between the installation end face 34 and the horizontal plane, the angle between the installation end face 34 and the horizontal plane is more conducive to fixedly connecting the muffler 3 and the first pipeline 1, further reducing the installation difficulty of the muffler 3 and the first pipeline 1, and further improving the assembly efficiency of the intake device 100.

[0042] In some embodiments of the present utility model, as Figure 2 and Figure 4 shown, an installation arm 33 protruding from the muffler 3 is formed on the outer surface of the muffler 3. The installation arm 33 is used for fixed assembly with the engine.

[0043] Among them, the outer surface of the muffler 3 may be formed with mounting arms 33 protruding from the muffler 3. The mounting arms 33 are used to fix the muffler 3 to the engine. The mounting arms 33 protruding from the muffler 3 facilitate the fixed connection with the engine. By providing the mounting arms 33, the muffler 3 can be fixedly connected to the engine to improve the position stability of the muffler 3.

[0044] As some embodiments of the present invention, the mounting arm 33 may be constructed with reinforcing ribs. The reinforcing ribs are connected between the muffler 3 and the mounting arm 33, and the reinforcing ribs can improve the structural strength of the mounting arm 33.

[0045] As some embodiments of the present invention, the mounting arm 33 may be snap-connected or bolt-connected to the engine, etc., so as to stably mount the mounting arm 33 on the engine.

[0046] As some embodiments of the present invention, the mounting arm 33 and the muffler 3 may be integrally formed parts. The integrally formed parts have good structural strength and can reduce the probability of fracture at the connection between the mounting arm 33 and the muffler 3.

[0047] As some other embodiments of the present invention, the mounting arm 33 and the muffler 3 may be separate parts. The mounting arm 33 and the muffler 3 may be welded, snap-connected or bolt-connected, so that the mounting arm 33 and the muffler 3 can be designed separately to facilitate the separate repair and replacement of the mounting arm 33 and the muffler 3.

[0048] In some embodiments of the present invention, as Figure 2 and Figure 4 shown, the mounting arm 33 forms a mounting hole 331 and a positioning portion 332.

[0049] Among them, the mounting arm 33 may be formed with a mounting hole 331 and a positioning portion 332. The engine may be formed with a mounting portion and a positioning structure. The positioning portion 332 may be one of a positioning hole and a positioning post, and the positioning structure may be the other of a positioning hole and a positioning post. In this application, the case where the positioning portion 332 is a positioning post and the positioning structure is a positioning hole is taken as an example for illustration. When the mounting arm 33 and the engine are assembled, the mounting arm 33 is positioned to the correct mounting position by inserting the positioning post into the positioning hole, and then the mounting arm 33 is fixed to the engine by passing a bolt through the mounting hole 331 and connecting it to the mounting portion. By providing the mounting hole 331 and the positioning portion 332 on the mounting arm 33, the operation difficulty of fixing the mounting arm 33 to the engine can be reduced, and the assembly efficiency of the intake device 100 can be improved.

[0050] As some embodiments of the present invention, the mounting arm 33 of the intake device 100 may be provided with only one mounting hole 331. Such a setting can reduce the mounting difficulty of the intake device 100 fixed to the engine.

[0051] In some embodiments of the present utility model, such as Figure 3 and Figure 4 shown, the muffler 3 is further formed with a plurality of connecting channels 322, and at least one of the plurality of connecting channels 322 is used to communicate with the crankcase ventilation pipe of the engine, at least one of the plurality of connecting channels 322 is used to communicate with the bypass valve of the engine, at least one of the plurality of connecting channels 322 is used to communicate with the fuel desorption pipe of the engine, and all of the plurality of connecting channels 322 communicate with the sound absorption channel 321.

[0052] Wherein, the muffler 3 can be configured with a plurality of connecting channels 322, and the plurality of connecting channels 322 can respectively communicate the sound absorption channel 321 of the muffler 3 with the crankcase ventilation pipe interface, the bypass valve interface, the fuel desorption pipe interface, etc. As a specific embodiment of the present utility model, the crankcase ventilation pipe interface can enable the gas flowing out of the crankcase ventilation pipe to be silenced by the muffler 3 and flow into the intake structure, the gas flowing out of the bypass valve can be silenced by the muffler 3 and flow into the intake structure, and the fuel desorption pipe interface can enable the fuel vapor to flow into the muffler 3 to be silenced and flow into the intake structure.

[0053] In the above embodiment, by making the muffler 3 formed with a plurality of connecting channels 322, a plurality of components including the crankcase ventilation pipe, the bypass valve, the fuel desorption pipe, etc. can be communicated with the muffler 3, so that the plurality of components are integrated with the muffler 3, and further, the integration degree of the intake device 100 can be improved, the space utilization rate of the intake device 100 can be increased, the intake device 100 can be made more compact, and the installation space of the vehicle engine compartment can be saved.

[0054] In some embodiments of the present utility model, such as Figure 3 and Figure 4 shown, the muffler 3 includes: a housing 31 and a muffler main body 32. The muffler main body 32 is disposed inside the housing 31. The muffler main body 32 is formed with a sound absorption channel 321 and a plurality of connecting channels 322. The housing 31 is formed with a first interface 311, a second interface 312 and a plurality of third interfaces 313. The sound absorption channel 321 communicates the first interface 311 and the second interface 312. The first interface 311 communicates with the first pipeline 1, the second interface 312 communicates with the second pipeline 2, and the plurality of third interfaces 313 respectively communicate with the plurality of connecting channels 322.

[0055] Among them, the muffler 3 may include a housing 31 and a muffler main body 32. The muffler main body 32 may be located inside the housing 31. The housing 31 can protect the muffler main body 32 and reduce the entry of external pollutants into and blockage of the muffler main body 32. The muffler main body 32 may be formed with a sound-absorbing channel 321 and a plurality of connecting channels 322. The sound-absorbing channel 321 can be used to absorb the sound of the gas flowing into the muffler main body 32 to reduce the noise of the intake device 100. The plurality of connecting channels 322 can be used to connect the muffler 3 with a plurality of components such as a crankcase ventilation pipe, a bypass valve, and a fuel desorption pipe, so as to improve the integration degree of the muffler 3.

[0056] The housing 31 may be formed with a first interface 311, a second interface 312, and a plurality of third interfaces 313. The first interface 311 can be used to communicate with the first pipeline 1, the second interface 312 can be used to communicate with the second pipeline 2, and the plurality of third interfaces 313 can be used to communicate with the plurality of connecting channels 322. As an example, the plurality of third interfaces 313 and the plurality of connecting channels 322 are in one-to-one correspondence and communication. By providing the first interface 311, the second interface 312, and the plurality of third interfaces 313, the muffler 3 can be connected in series between the first pipeline 1 and the second pipeline 2, and the muffler 3 is also connected to a plurality of other components, so that a plurality of other components can be integrated into the muffler 3, thereby improving the integration degree of the muffler 3 to improve the integration degree of the intake device 100, which is beneficial to improving the space utilization rate of the intake device 100.

[0057] In some embodiments of the present invention, as Figure 4 shown, a connection space 35 is formed between the housing 31 and the muffler main body 32. The connecting channel 322 communicating with the crankcase ventilation pipe and the corresponding third interface 313 are communicated through the connection space 35, and the housing 31 is formed with a material storage tank 36. The material storage tank 36 is communicated with the connection space 35 and is located below the connection space 35. A baffle structure 351 is provided in the connection space 35, and the baffle structure 351 is fixed to the side wall of the connection space 35.

[0058] Among them, a connection space 35 may be formed between the housing 31 and the muffler main body 32. The connection space 35 can communicate the connecting channel 322 communicating with the crankcase ventilation pipe and the corresponding third interface 313. A material storage tank 36 communicating with the connection space 35 is provided below the connection space 35. The material storage tank 36 can store the condensed water formed by the condensation of the gas coming from the crankcase and the ice formed due to low temperature, and can also reduce the probability of the ice falling into the second pipeline 2 and then damaging the turbocharger blades.

[0059] It should be noted that the ice stored in the material storage tank 36 can be melted by the heat generated by the engine operation so that the material storage tank 36 has space to store ice.

[0060] A baffle structure 351 may be provided in the connection space 35. There may be a plurality of baffle structures 351, and the plurality of baffle structures 351 may divide the connection space 35 into a plurality of connection channels 352. Two adjacent connection channels 352 may be communicated with each other, and the plurality of connection channels 352 may be connected in series in sequence. One connection channel 352 at the end may be communicated with the corresponding third interface 313, and the connection channel 322 communicated with the crankcase ventilation pipe and the other connection channel 352 at the end may be communicated with each other. The gas flowing into the connection space 35 from the crankcase ventilation pipe may flow through the plurality of connection channels 352 in sequence and finally flow into the sound-absorbing channel 321 of the muffler main body 32 through the corresponding connection channel 322.

[0061] It should be noted that the plurality of baffle structures 351 in the connection space 35 may be connected to different inner walls of the connection space 35. For example, as Figure 4 shown, the two baffle structures 351 are respectively fixedly connected to the inner walls of the connection space 35 that are opposite and spaced apart. Such a setting can enable the connection space 35 to be divided into a plurality of connection channels 352 by the plurality of baffle structures 351. The gas flowing in from the crankcase ventilation pipe will impact the plurality of baffle structures 351 and different inner walls of the connection space 35 multiple times when flowing in the plurality of connection channels 352 formed in the connection space 35. The plurality of baffle structures 351 and different inner walls of the connection space 35 provide liquefaction attachment points for the gas flowing in from the crankcase ventilation pipe, enabling it to liquefy in the connection space 35, so as to perform rough separation filtration and drying on the gas flowing in from the crankcase ventilation pipe.

[0062] In addition, the plurality of baffle structures 351 can play the role of reinforcing ribs, and can improve the structural strength of the connection space 35.

[0063] The engine according to an embodiment of the present invention includes the intake device 100 of the engine in the above embodiment. By connecting the muffler 3 between the first pipeline 1 and the second pipeline 2, the structure of the intake device 100 can be made compact, the integration degree and space utilization rate of the intake device 100 can be improved, and by forming an angle β between the axis of the second pipeline outlet 21 and the vertical direction, when the air flows from the outlet of the second pipeline 2 to the intake structure, the air flow can be made smooth, the kinetic energy loss of the air can be reduced, so as to improve the intake efficiency of the engine.

[0064] The vehicle according to an embodiment of the present invention includes the engine in the above embodiment. By connecting the muffler 3 between the first pipeline 1 and the second pipeline 2, the structure of the intake device 100 can be made compact, the integration degree and space utilization rate of the intake device 100 can be improved, and by forming an angle β between the axis of the second pipeline outlet 21 and the vertical direction, when the air flows from the outlet of the second pipeline 2 to the intake structure, the air flow can be made smooth, the kinetic energy loss of the air can be reduced, so as to improve the intake efficiency of the engine.

[0065] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model.

[0066] In the description of the present utility model, the "first feature" and the "second feature" may include one or more of such features.

[0067] In the description of the present utility model, the meaning of "a plurality of" is two or more.

[0068] In the description of the present utility model, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact through additional features therebetween.

[0069] In the description of the present utility model, the first feature being "above", "over" and "on" the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the horizontal height of the first feature is higher than that of the second feature.

[0070] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "schematic embodiments", "examples", "specific examples", or "some examples", etc. means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0071] Although the embodiments of the present utility model have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present utility model. The scope of the present utility model is defined by the claims and their equivalents.

Claims

1. An air intake device (100) for an engine, characterized in that: include: A first pipeline (1), a muffler (3) and a second pipeline (2), wherein the muffler (3) is connected between the first pipeline (1) and the second pipeline (2), the muffler (3) is formed with a muffler channel (321), the muffler channel (321) is connected to the first pipeline (1) and the second pipeline (2), the first pipeline (1) is used to be connected to an air filter of the engine, the second pipeline (2) is used to be connected to an intake structure of the engine, the end of the second pipeline (2) away from the muffler (3) forms a second pipeline outlet (21), the axis of the second pipeline outlet (21) forms an angle β with the vertical direction, and the relationship: 30°≤β≤40° is satisfied.

2. The air intake device (100) of the engine according to claim 1, characterized in that: The second pipeline (2) is configured in an arc shape.

3. The air intake device (100) of the engine according to claim 1, characterized in that: The outer surface of the muffler (3) is formed with a mounting end surface (34), an angle is formed between the mounting end surface (34) and a horizontal plane, and the mounting end surface (34) is assembled in cooperation with the first pipeline (1).

4. The air intake device (100) of the engine according to claim 3, characterized in that: An included angle α is formed between the mounting end surface (34) and the horizontal plane, satisfying the relationship: 120°≤α≤130°.

5. The air intake device (100) of the engine according to claim 3, characterized in that: The outer surface of the muffler (3) is formed with a mounting arm (33) protruding from the muffler (3), and the mounting arm (33) is used for being fixedly assembled with the engine.

6. The air intake device (100) of the engine according to claim 5, characterized in that: The mounting arm (33) forms a mounting hole (331) and a positioning portion (332).

7. The air intake device (100) of an engine according to any one of claims 1 to 6, characterized in that: The muffler (3) is further formed with a plurality of connecting channels (322), at least one of the plurality of connecting channels (322) is used to communicate with the crankcase ventilation pipe of the engine, at least one of the plurality of connecting channels (322) is used to communicate with the bypass valve of the engine, at least one of the plurality of connecting channels (322) is used to communicate with the fuel desorption pipe of the engine, and the plurality of connecting channels (322) are all connected with the muffler channel (321).

8. The air intake device (100) of the engine according to claim 7, characterized in that: The muffler (3) comprises: a shell (31) and a muffler body (32); the muffler body (32) is arranged in the shell (31); the muffler body (32) is formed with the muffler channel (321) and a plurality of connecting channels (322); the shell (31) is formed with a first interface (311), a second interface (312) and a plurality of third interfaces (313); the muffler channel (321) is connected with the first interface (311) and the second interface (312); the first interface (311) is connected with the first pipeline (1); the second interface (312) is connected with the second pipeline (2); and the plurality of third interfaces (313) are respectively connected with the plurality of connecting channels (322).

9. The air intake device (100) of the engine according to claim 8, characterized in that: A connecting space (35) is formed between the shell (31) and the muffler body (32), the connecting channel (322) connected to the crankcase ventilation pipe and the corresponding third interface (313) are connected through the connecting space (35), and the shell (31) is formed with a material storage groove (36), the material storage groove (36) is connected to the connecting space (35) and is located below the connecting space (35); A baffle structure (351) is provided in the connection space (35), and the baffle structure (351) is fixed to the side wall of the connection space (35).

10. An engine, characterized in that: An air intake device (100) comprising an engine according to any one of claims 1-9.

11. A vehicle, characterized in that: Comprising an engine according to claim 10.

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