Exhaust manifold assembly, engine and vehicle

Abstract

The utility model provides an exhaust manifold assembly, an engine and a vehicle, and belongs to the technical field of vehicles, the exhaust manifold assembly comprises a first manifold group, and a second manifold group and a third manifold group which are respectively positioned on two opposite sides of the first manifold group; the first manifold set, the second manifold set and the third manifold set each comprise at least one exhaust manifold, the air inlet end of each exhaust manifold is connected with at least one air cylinder of an engine, the exhaust end of each exhaust manifold is connected with an exhaust pipe, and the length of each exhaust manifold is larger than the first preset length. The length of the exhaust manifolds in the first manifold set is larger than the length of the exhaust manifolds in the second manifold set and the length of the exhaust manifolds in the third manifold set. According to the exhaust manifold, the space layout of the exhaust manifold is optimized, meanwhile, the length of the exhaust manifold is increased, then the capacity of the exhaust manifold for containing sound source energy is enhanced, and finally the effect of improving the auditory feeling of a user on a vehicle is achieved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of vehicles, in particular to an exhaust manifold assembly, an engine and a vehicle. BACKGROUND

[0002] During driving, a vehicle will produce some sounds with moving power, and most of these sounds come from the sound source energy produced by the engine exhaust. For sports vehicles such as sports cars, in order to further improve the auditory perception of the vehicle to the user, it is necessary to have greater sound source energy than conventional vehicles.

[0003] In the related art, due to unreasonable arrangement and structure of the exhaust manifold, the sound source energy of the vehicle is insufficient, and the auditory perception of the user is insufficient. CONTENT OF THE UTILITY MODEL

[0004] Therefore, the present application provides an exhaust manifold assembly, an engine and a vehicle to solve the problem of how to improve the auditory perception of the vehicle to the user.

[0005] In a first aspect, the present application provides an exhaust manifold assembly, which comprises:

[0006] a first manifold group, and a second manifold group and a third manifold group located on opposite sides of the first manifold group, respectively;

[0007] The first manifold group, the second manifold group and the third manifold group each comprise at least one exhaust manifold, the intake end of the exhaust manifold is connected to at least one cylinder of the engine, the exhaust end of the exhaust manifold is connected to an exhaust pipe, and the length of the exhaust manifold is greater than a first predetermined length.

[0008] The length of the exhaust manifold in the first manifold group is greater than the length of the exhaust manifold in the second manifold group and the third manifold group.

[0009] In some exemplary embodiments, the length difference between the exhaust manifold in the second manifold group and the exhaust manifold in the third manifold group is less than a second predetermined length.

[0010] By setting the length difference between the exhaust manifold in the second manifold group and the exhaust manifold in the third manifold group to be less than the second predetermined length, the present application can reduce the time difference between the sound waves reaching the exhaust pipe through the exhaust manifold of the second manifold group and the sound waves reaching the exhaust pipe through the exhaust manifold of the third manifold group, thereby avoiding cancellation of the two sound waves, and further increasing the sound produced by the vehicle during driving and improving the auditory perception of the user.

[0011] In some example embodiments, the number of exhaust manifolds in the second manifold group is equal to the number of exhaust manifolds in the third manifold group.

[0012] The embodiment equalizes the number of exhaust manifolds in the second manifold group and the number of exhaust manifolds in the third manifold group, which can make the sound waves of the exhaust manifolds in the second manifold group and the sound waves of the exhaust manifolds in the third manifold group cancel each other out, thereby reducing the interference of the two on the sound waves in the first manifold group, to improve the sound quality of the vehicle.

[0013] In some example embodiments, the exhaust manifolds in the second manifold group are symmetrically arranged on both sides of the first manifold group.

[0014] The embodiment symmetrically arranges the exhaust manifolds in the second manifold group and the exhaust manifolds in the third manifold group on both sides of the first manifold group, which can make the sound waves of the exhaust manifolds in the second manifold group and the sound waves of the exhaust manifolds in the third manifold group cancel each other out, thereby reducing the interference of the two on the sound waves in the first manifold group, to further improve the auditory perception of the user.

[0015] In some example embodiments, the diameter of the exhaust manifold is greater than 32mm.

[0016] The embodiment can reduce the exhaust back pressure of the exhaust gas, thereby allowing more exhaust gas to remain in the exhaust manifold, allowing the sound source energy to have more sources of conversion, thereby increasing the sound source energy in the exhaust manifold a. At the same time, the more exhaust gas in the exhaust manifold and the larger cross-sectional area of the exhaust manifold can also increase the turbulence and vortex of the exhaust gas when flowing through the exhaust manifold, thereby further enhancing the airflow sound.

[0017] In some example embodiments, the first manifold group, the second manifold group, and the third manifold group each include one exhaust manifold, and the intake end of the exhaust manifold is connected to two cylinders of the engine.

[0018] The embodiment connects the intake end of the exhaust manifold to two cylinders of the engine, which increases the flow of exhaust gas into the exhaust manifold, thereby allowing more exhaust gas to enter the exhaust manifold, allowing the sound source energy to have more sources of conversion, increasing the sound source energy in the exhaust manifold, and achieving further improvement in the auditory perception of the user.

[0019] In some example embodiments, the axis of the exhaust manifold in the first manifold group is in the shape of a smooth transition curve.

[0020] The embodiment sets the axis of the exhaust manifold in the first manifold group as a smooth transition curve, so that the exhaust manifold in the first manifold group can extend in a meandering manner, so as to increase the space utilization of the first manifold group. Meanwhile, the exhaust manifold in the first manifold group of the embodiment can also avoid frequent collision of exhaust gas with the pipe wall during discharge, so that the exhaust gas can be smoothly discharged.

[0021] In some exemplary embodiments, the exhaust manifold in the second manifold group and the third manifold group each comprises a first sub-pipe and a second sub-pipe connected to the first sub-pipe;

[0022] The end of the first sub-pipe away from the second sub-pipe is connected to the at least one cylinder, and the end of the second sub-pipe away from the first sub-pipe is connected to the exhaust pipe;

[0023] The included angle between the axis of the first sub-pipe and the axis of the second sub-pipe is greater than a preset angle.

[0024] The embodiment divides the exhaust manifold in the second manifold group and the third manifold group into a first sub-pipe and a second sub-pipe, which can effectively reduce the space required by the exhaust manifold, so as to optimize the structural layout of the vehicle.

[0025] In a second aspect of the embodiment, an engine is provided, which comprises the exhaust manifold assembly of the first aspect of the embodiment and a cylinder head, and the exhaust manifold assembly is exposed outside the cylinder head.

[0026] In a third aspect of the embodiment, a vehicle is provided, which comprises the engine of the second aspect of the embodiment.

[0027] The application provides an exhaust manifold assembly, an engine and a vehicle. The exhaust manifold assembly comprises a first manifold group, and a second manifold group and a third manifold group located on opposite sides of the first manifold group, respectively. The first manifold group, the second manifold group and the third manifold group each comprise at least one exhaust manifold. The intake end of the exhaust manifold is connected to at least one cylinder of the engine, the exhaust end of the exhaust manifold is connected to an exhaust pipe, and the length of the exhaust manifold is greater than a first preset length. The length of the exhaust manifold in the first manifold group is greater than the length of the exhaust manifold in the second manifold group and the third manifold group.

[0028] The exhaust manifold assembly in the application comprises three manifold groups, namely a first manifold group, a second manifold group and a third manifold group. At least one exhaust manifold is included in each of the first manifold group, the second manifold group and the third manifold group, and the length of the exhaust manifold in the first manifold group is greater than the length of the exhaust manifold in the second manifold group and the third manifold group. The length of the exhaust manifold in the application is greater than the first preset length, and the length of the exhaust manifold in the first manifold group is in the middle position, which is longer than the length of the exhaust manifold in the second manifold group and the third manifold group in the two side positions. The spatial layout of the exhaust manifold is optimized, and at the same time, the length of the exhaust manifold is increased, thereby enhancing the ability of the exhaust manifold to contain sound source energy, and finally achieving the effect of improving the auditory perception of the user to the vehicle. BRIEF DESCRIPTION OF DRAWINGS

[0029] In order to more clearly illustrate the technical solutions of the embodiments of the application, the drawings needed to be used in the description of the embodiments of the application will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the application, and other drawings can be obtained by those skilled in the art without creative labor.

[0030] Figure 1 It is a structural schematic diagram of an exhaust manifold assembly provided by the embodiments of the application.

[0031] Label explanation:

[0032] 1-First manifold group, 2-Second manifold group, 3-Third manifold group, a-Exhaust manifold, a1-First sub-pipe, a2-Second sub-pipe. DETAILED DESCRIPTION

[0033] The technical solutions in the embodiments of the application will be described clearly and completely in the following with reference to the drawings in the embodiments of the application. Obviously, the described embodiments are only a part of the embodiments of the application, not all the embodiments. Based on the embodiments in the application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the application.

[0034] The vehicle will produce some sounds with movement force during driving, most of which come from the sound source energy generated during engine exhaust. Sound source energy refers to the total energy emitted by the sound source, which is the source of energy in the process of sound wave propagation, and determines the intensity of the sound wave. Since the intensity of the sound wave is quantified by decibels, the greater the sound source energy, the louder the sound, so the greater the sound source energy, the stronger the auditory perception of the user. For sports vehicles such as sports cars, in order to further improve the auditory perception of the vehicle to the user, it is necessary to have relatively larger sound source energy than conventional vehicles.

[0035] In the related art, due to unreasonable arrangement and structure of the exhaust manifold, the sound source energy of the vehicle is insufficient, and the user's auditory perception is insufficient.

[0036] Therefore, to solve the problem of how to improve the user's auditory perception of the vehicle, the application provides an exhaust manifold assembly, an engine and a vehicle. The exhaust manifold assembly includes three manifold groups, namely a first manifold group, a second manifold group and a third manifold group. Each of the first manifold group, the second manifold group and the third manifold group includes at least one exhaust manifold, and the length of the exhaust manifold in the first manifold group is greater than the length of the exhaust manifold in the second manifold group and the third manifold group. In this embodiment, the length of the exhaust manifold in the first manifold group located in the middle position is set to be longer than the length of the exhaust manifold in the second manifold group and the third manifold group located on both sides. The spatial layout of the exhaust manifold can be optimized, so that there is more space to accommodate longer exhaust manifolds at the position of the exhaust manifold, thereby increasing the sound source energy contained in the exhaust manifold, and finally achieving the effect of improving the user's auditory perception of the vehicle. The specific structure is as follows:

[0037] The first aspect of the application provides an embodiment, as shown in Figure 1 As shown in a structural schematic diagram of an exhaust manifold assembly, the exhaust manifold assembly includes:

[0038] The first manifold group 1, the second manifold group 2 and the third manifold group 3 are located on both sides of the first manifold group 1.

[0039] The first manifold group 1, the second manifold group 2 and the third manifold group 3 each include at least one exhaust manifold a. The intake end of the exhaust manifold a is connected to at least one cylinder of the engine, the exhaust end of the exhaust manifold a is connected to an exhaust pipe, and the length of the exhaust manifold a is greater than a first preset length.

[0040] The length of the exhaust manifold a in the first manifold group 1 is greater than the length of the exhaust manifold a in the second manifold group 2 and the third manifold group 3.

[0041] The exhaust manifold assembly includes a plurality of exhaust manifolds a, which are divided into the first manifold group 1, the second manifold group 2 and the third manifold group 3. The first manifold group 1, the second manifold group 2 and the third manifold group 3 each include at least one exhaust manifold a. For example, the first manifold group 1 can include two exhaust manifolds a, the second manifold group 2 can include one exhaust manifold a, and the third manifold group 3 can include one exhaust manifold a; or the first manifold group 1 can include one exhaust manifold a, the second manifold group 2 can include two exhaust manifolds a, and the third manifold group 3 can include one exhaust manifold a.

[0042] The second manifold group 2 and the third manifold group 3 are respectively located on the opposite sides of the first manifold group 1, that is, the first manifold group 1 is located between the second manifold group 2 and the third manifold group 3. For example, in the left-right direction, the second manifold group 2 can be located on the left side of the first manifold group 1, and the third manifold group 3 can be located on the right side of the first manifold group 1. Alternatively, with reference to the vehicle body, the second manifold group 2 can be located on the side of the first manifold group 1 close to the front side of the vehicle body, and the third manifold group 3 can be located on the side of the first manifold group 1 close to the rear side of the vehicle body.

[0043] The intake end of the exhaust manifold a is connected to at least one cylinder of the engine, specifically to the exhaust valve of the engine, and the exhaust end of the exhaust manifold a is connected to the exhaust pipe. It should be noted that, since the second manifold group 2 and the third manifold group 3 are located on the two sides, and the first manifold group 1 is located in the middle, the exhaust manifold a in the second manifold group 2 and the third manifold group 3 is also correspondingly connected to the cylinder located on the two sides of the engine. The exhaust manifold a in the first manifold group 1 is correspondingly connected to the cylinder located in the middle of the engine.

[0044] When the engine is working, the exhaust gas after combustion in the cylinder is discharged into the exhaust manifold a through the exhaust valve, and then enters the exhaust pipe through the exhaust manifold a to be discharged to the outside environment. In this process, after the exhaust gas enters the exhaust manifold a, the heat energy or kinetic energy contained in the exhaust gas is converted into sound source energy in the exhaust manifold a, thereby generating a strong and powerful sound. Since the length of the exhaust manifold a in the present application is greater than the first preset length, and the length of the exhaust manifold a in the first manifold group 1 located in the middle position is longer than the length of the exhaust manifold a in the second manifold group 2 and the third manifold group 3 located on the two sides, the exhaust manifold assembly of the present application can have more sound source energy, thereby increasing the sound generated when the vehicle is running.

[0045] In some optional embodiments, the first preset length can be 300 mm.

[0046] In an optional embodiment, the length of the exhaust manifold a can also be less than a third preset length, so as to avoid that the temperature of the exhaust gas discharged by the cylinder is too low when reaching the front catalyst, and to reduce the exhaust treatment effect of the vehicle. The third preset length can be 400 mm.

[0047] The exhaust manifold assembly in the embodiment includes three manifold groups, namely a first manifold group 1, a second manifold group 2, and a third manifold group 3. Each of the first manifold group 1, the second manifold group 2, and the third manifold group 3 includes at least one exhaust manifold a, and the length of the exhaust manifold a in the first manifold group 1 is greater than the length of the exhaust manifold a in the second manifold group 2 and the third manifold group 3. In the embodiment, the length of the exhaust manifold a is greater than a first preset length, and the length of the exhaust manifold a in the first manifold group 1 at the middle position is greater than the length of the exhaust manifold a in the second manifold group 2 and the third manifold group 3 at the two side positions, so that the spatial layout of the exhaust manifold a is optimized, the length of the exhaust manifold a is increased, the ability of the exhaust manifold a to accommodate sound source energy is enhanced, and the effect of improving the auditory perception of the user for the vehicle is finally achieved.

[0048] In some exemplary embodiments, the length difference between the exhaust manifold a in the second manifold group 2 and the exhaust manifold a in the third manifold group 3 is less than a second preset length.

[0049] Sound waves propagate in the exhaust manifold a in the form of plane waves. When the sound waves reach the top end of the pipeline, part of the sound waves will continue to propagate through the pipeline, and the other part of the sound waves will be reflected back to form reflected waves. Different lengths of the exhaust manifold a will result in different durations of the sound waves propagating in the exhaust manifold a.

[0050] Because the durations of the sound waves propagating in different exhaust manifolds a are different, the times at which the sound waves propagating through different exhaust manifolds a reach the exhaust pipe are also different, so that the superposition and cancellation of the sound waves are also different. Therefore, to avoid the cancellation between the sound waves reaching the exhaust pipe through the exhaust manifold a in the second manifold group 2 and the sound waves reaching the exhaust pipe through the exhaust manifold a in the third manifold group 3, and to ensure the sound quality of the vehicle, the length difference between the length of the exhaust manifold a in the second manifold group 2 and the length of the exhaust manifold a in the third manifold group 3 should be less than a second preset length.

[0051] In an alternative implementation, the exhaust manifold a in the second manifold group 2 and the exhaust manifold a in the third manifold group 3 can be equal in length.

[0052] In an alternative implementation, the second preset length can be 10 mm.

[0053] By setting the length difference between the exhaust manifold a in the second manifold group 2 and the exhaust manifold a in the third manifold group 3 to be less than a second preset length, the embodiment can reduce the time difference between the sound waves reaching the exhaust pipe through the exhaust manifold a in the second manifold group 2 and the sound waves reaching the exhaust pipe through the exhaust manifold a in the third manifold group 3, thereby avoiding the cancellation between the two, and further increasing the sound produced by the vehicle when driving and improving the auditory perception of the user.

[0054] In some example embodiments, the number of exhaust gas manifolds a in the second manifold group 2 is equal to the number of exhaust gas manifolds a in the third manifold group 3.

[0055] The second manifold group 2 and the third manifold group 3 are located on the two sides of the first manifold group 1. When the sound waves of the exhaust gas manifolds a in the second manifold group 2 and the sound waves of the exhaust gas manifolds a in the third manifold group 3 propagate simultaneously towards the direction close to the first manifold group 1, they will converge at the location of the first manifold group 1, thereby interfering with the sound waves in the first manifold group 1. Therefore, in order to reduce such interference, the number of exhaust gas manifolds a in the second manifold group 2 can be equal to the number of exhaust gas manifolds a in the third manifold group 3, so that they can offset each other, thereby reducing the interference and improving the sound quality of the vehicle.

[0056] In an alternative embodiment, the second manifold group 2 and the third manifold group 3 can each include one exhaust gas manifold a. Alternatively, the second manifold group 2 and the third manifold group 3 can each include two exhaust gas manifolds a.

[0057] In some example embodiments, the exhaust gas manifolds a in the second manifold group 2 and the exhaust gas manifolds a in the third manifold group 3 are symmetrically arranged on the two sides of the first manifold group 1.

[0058] According to the analysis in the above embodiments, since the second manifold group 2 and the third manifold group 3 are located on the two sides of the first manifold group 1, when the sound waves of the exhaust gas manifolds a in the second manifold group 2 and the sound waves of the exhaust gas manifolds a in the third manifold group 3 propagate simultaneously towards the direction close to the first manifold group 1, they will converge at the location of the first manifold group 1, thereby interfering with the sound waves in the first manifold group 1.

[0059] Therefore, the exhaust gas manifolds a in the second manifold group 2 and the exhaust gas manifolds a in the third manifold group 3 can be symmetrically arranged on the two sides of the first manifold group 1, thereby improving the ability of mutual offsetting to minimize the interference.

[0060] In some example embodiments, the diameter of the exhaust gas manifold a is greater than 32 mm.

[0061] The diameter of the exhaust manifold a affects the flow rate of the exhaust gas in the exhaust manifold a, the exhaust back pressure, and the propagation characteristics of the sound waves in the pipeline. When the diameter of the exhaust manifold a is larger, the larger diameter reduces the exhaust back pressure of the exhaust gas, thereby allowing more exhaust gas to remain in the exhaust manifold a, allowing the sound source energy to have more sources of conversion, thereby increasing the sound source energy in the exhaust manifold a. At the same time, the more exhaust gas in the exhaust manifold a and the larger cross-sectional area of the exhaust manifold a result in more turbulence and vortex flow of the exhaust gas when flowing through the exhaust manifold a, thereby further enhancing the airflow sound, and ultimately achieving further improvement in the user's auditory perception.

[0062] In an alternative embodiment, the diameter of the exhaust manifold a can be 36 mm. The diameters of the exhaust manifold a in the first manifold group 1, the exhaust manifold a in the second manifold group 2, and the exhaust manifold a in the third exhaust manifold group can be the same or different.

[0063] In some exemplary embodiments, the first manifold group 1, the second manifold group 2, and the third manifold group 3 each include an exhaust manifold a, and the intake end of the exhaust manifold a is connected to two cylinders of the engine.

[0064] When the engine is in operation, multiple engine cylinders will sequentially discharge exhaust gas in a certain order. Therefore, connecting the intake end of the exhaust manifold a to two cylinders of the engine can improve the sound intensity of the vehicle during exhaust.

[0065] In an alternative embodiment, the exhaust manifold assembly of the present embodiment can be applied to a V-type six-cylinder engine. The V-type six-cylinder engine includes two rows of six cylinders in total, each row including three cylinders. The two cylinders connected to the intake end of the exhaust manifold a can be from the two rows or from one of the rows.

[0066] The present embodiment connects the intake end of the exhaust manifold a to two cylinders of the engine, thereby increasing the exhaust gas flow into the exhaust manifold a, allowing more exhaust gas to enter the exhaust manifold a, allowing the sound source energy to have more sources of conversion, increasing the sound source energy in the exhaust manifold a, and achieving further improvement in the user's auditory perception.

[0067] In some exemplary embodiments, the axis of the exhaust manifold a in the first manifold group 1 is in the shape of a smooth transition curve.

[0068] Since the length of the exhaust manifold a in the first manifold group 1 is greater than the length of the exhaust manifold a in the second manifold group 2 and the third manifold group 3, and the first manifold group 1 is located in the middle of the second manifold group 2 and the third manifold group 3, the layout of the exhaust manifold a in the first manifold group 1 has a contradiction between the required space being large and the actual space being small.

[0069] Therefore, the axis of the exhaust manifold a in the first manifold group 1 is set as a smooth transition curve, so that the exhaust manifold a in the first manifold group 1 can extend in a meandering manner to increase the space utilization of the first manifold group 1. At the same time, the exhaust manifold a in the first manifold group 1 of the embodiment can also avoid the exhaust gas from colliding with the pipe wall frequently during the exhaust process, so that the exhaust gas can be smoothly discharged.

[0070] In some optional embodiments, the axis of the exhaust manifold a in the first manifold group 1 can be in a circular arc shape or an S shape.

[0071] In some exemplary embodiments, the exhaust manifold a in the second manifold group 2 and the third manifold group 3 each includes a first sub-pipe a1 and a second sub-pipe a2 connected to the first sub-pipe a1.

[0072] The end of the first sub-pipe a1 away from the second sub-pipe a2 is connected to at least one cylinder, and the end of the second sub-pipe a2 away from the first sub-pipe a1 is connected to an exhaust pipe.

[0073] The angle between the axis of the first sub-pipe a1 and the axis of the second sub-pipe a2 is greater than a preset angle.

[0074] Since the second manifold group 2 and the third manifold group 3 are located at both sides, and the length of the exhaust manifold a in the second manifold group 2 and the third manifold group 3 is shorter than that of the exhaust manifold a in the first manifold group 1, the available layout space of the second manifold group 2 and the third manifold group 3 is larger. However, considering the compactness of the vehicle structure and the space required for the layout of other components, the second manifold group 2 and the third manifold group 3 should not occupy too much space.

[0075] Therefore, the exhaust manifold a in the second manifold group 2 and the third manifold group 3 can be divided into a first sub-pipe a1 and a second sub-pipe a2, and the axes of the first sub-pipe a1 and the second sub-pipe a2 form a certain angle with each other, so as to reduce the space occupied by the second manifold group 2 and the third manifold group 3.

[0076] At the same time, the exhaust manifold a in the second manifold group 2 and the third manifold group 3 can also avoid the exhaust gas from colliding with the pipe wall frequently during the exhaust process, so that the exhaust gas can be smoothly discharged. The angle between the axis of the first sub-pipe a1 and the axis of the second sub-pipe a2 should be greater than a preset angle.

[0077] In an optional embodiment, the preset angle can be 120°.

[0078] Based on the above embodiments, reference is made to Figure 1 The structure of an exhaust manifold assembly is shown in a schematic view, and the exhaust manifold assembly described in the present application will be exemplarily explained below:

[0079] The exhaust manifold assembly described in the application comprises:

[0080] The first manifold group 1, and the second manifold group 2 and the third manifold group 3 respectively located on the opposite sides of the first manifold group 1. Among them, the first manifold group 1, the second manifold group 2 and the third manifold group 3 respectively include an exhaust manifold a. The intake end of the exhaust manifold a is connected with two cylinders of the engine, and the exhaust end of the exhaust manifold a is connected with an exhaust pipe. The length of the exhaust manifold a is greater than the first preset length, and the diameter is greater than 32mm.

[0081] The length of the exhaust manifold a in the first manifold group 1 is greater than the length of the exhaust manifold a in the second manifold group 2 and the third manifold group 3, and the length difference between the exhaust manifold a in the second manifold group 2 and the exhaust manifold a in the third manifold group 3 is less than the second preset length. The exhaust manifold a in the second manifold group 2 and the exhaust manifold a in the third manifold group 3 are symmetrically arranged on the two sides of the first manifold group 1.

[0082] The axis of the exhaust manifold a in the first manifold group 1 is a smooth transition curve. The exhaust manifold a in the second manifold group 2 and the third manifold group 3 both include a first sub-pipe a1 and a second sub-pipe a2 connected with the first sub-pipe a1. The end of the first sub-pipe a1 away from the second sub-pipe a2 is connected with at least one cylinder, and the end of the second sub-pipe a2 away from the first sub-pipe a1 is connected with the exhaust pipe. The angle between the axis of the first sub-pipe a1 and the axis of the second sub-pipe a2 is greater than a preset angle.

[0083] The second aspect of the embodiment of the application provides an engine, which comprises the exhaust manifold assembly of the first aspect of the embodiment of the application and a cylinder head, and the exhaust manifold assembly is exposed outside the cylinder head.

[0084] The cylinder head, also known as cylinder head, is located at the top of the engine and covers the cylinder of the engine, together with the top of the piston and the cylinder wall to form the combustion chamber of the engine to ensure that the combustion chamber is sealed when the air-fuel mixture is compressed and ignited.

[0085] The exhaust manifold assembly is exposed outside the cylinder head, which can make the sound produced by the exhaust manifold a spread smoothly, thereby further improving the auditory perception of the user for the vehicle.

[0086] The embodiment of the application also provides a vehicle comprising the engine provided by the application.

[0087] The application provides an exhaust manifold assembly, an engine and a vehicle, the exhaust manifold assembly comprising: a first manifold group 1, and a second manifold group 2 and a third manifold group 3 located at opposite sides of the first manifold group 1 respectively; the first manifold group 1, the second manifold group 2 and the third manifold group 3 each comprise at least one exhaust manifold a, the intake end of the exhaust manifold a is connected with at least one cylinder of the engine, the exhaust end of the exhaust manifold a is connected with an exhaust pipe, and the length of the exhaust manifold a is greater than a first preset length; wherein the length of the exhaust manifold a in the first manifold group 1 is greater than the length of the exhaust manifold a in the second manifold group 2 and the third manifold group 3.

[0088] The exhaust manifold assembly in the application comprises three manifold groups, namely the first manifold group 1, the second manifold group 2 and the third manifold group 3. The first manifold group 1, the second manifold group 2 and the third manifold group 3 each comprise at least one exhaust manifold a, and the length of the exhaust manifold a in the first manifold group 1 is greater than the length of the exhaust manifold a in the second manifold group 2 and the third manifold group 3. The length of the exhaust manifold a in the application is greater than a first preset length, and the length of the exhaust manifold a in the first manifold group 1 located at the middle position is greater than the length of the exhaust manifold a in the second manifold group 2 and the third manifold group 3 located at the two side positions, so that the spatial layout of the exhaust manifold a is optimized, the length of the exhaust manifold a is increased, the ability of the exhaust manifold a to accommodate sound source energy is enhanced, and the effect of improving the auditory sensation of the user for the vehicle is finally realized.

[0089] Each of the embodiments in the specification is described in a progressive manner, and each embodiment focuses on the difference from other embodiments, and the same or similar parts between the embodiments can be referred to each other.

[0090] Although the preferred embodiments of the application have been described, those skilled in the art can make other changes and modifications to the embodiments once they know the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications falling within the scope of the embodiments of the application.

[0091] Finally, it is to be understood that the phraseology or terminology such as "first" and "second" etc. used herein is merely intended to differentiate one entity or operation from another entity or operation, without necessarily requiring or implying any actual such relationship or order between such entities or operations. Moreover, the terms "comprises", "comprising", or any other variations thereof, are intended to cover a non-exclusive inclusion, such that a process, structure, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, structure, article, or apparatus. An element proceeded by "comprises... a" does not, without more constraints, exclude the existence of additional identical elements in the process, structure, article, or apparatus that comprises the element.

[0092] The exhaust manifold assembly, the engine and the vehicle provided by the present application are described in detail above, and the principles and implementation manners of the present application are described by applying specific examples in the present article. The above description of the examples is only used to help understand the structure of the present application and its core idea; meanwhile, for those skilled in the art, the specific implementation manners and application ranges will be changed according to the idea of the present application. In conclusion, the content of the present article should not be understood as a limitation of the present application.

Claims

1. An exhaust manifold assembly, characterized in that: The exhaust manifold assembly includes: a first manifold group, and a second manifold group and a third manifold group respectively located on opposite sides of the first manifold group; Each of the first manifold group, the second manifold group, and the third manifold group includes at least one exhaust manifold, an intake end of the exhaust manifold is connected to at least one cylinder of the engine, an exhaust end of the exhaust manifold is connected to an exhaust pipe, and a length of the exhaust manifold is greater than a first preset length; The length of the exhaust manifold in the first manifold group is greater than the length of the exhaust manifold in the second manifold group and the third manifold group.

2. The exhaust manifold assembly according to claim 1, characterized in that: A length difference between the exhaust manifolds in the second manifold group and the exhaust manifolds in the third manifold group is less than a second predetermined length.

3. The exhaust manifold assembly according to claim 1, characterized in that: The number of exhaust manifolds in the second manifold group is equal to the number of exhaust manifolds in the third manifold group.

4. The exhaust manifold assembly according to claim 1, characterized in that: The exhaust manifolds in the second manifold group and the exhaust manifolds in the third manifold group are symmetrically arranged on both sides of the first manifold group.

5. The exhaust manifold assembly according to claim 1, characterized in that: The diameter of the exhaust manifold is greater than 32 mm.

6. The exhaust manifold assembly according to claim 1, characterized in that: The first manifold group, the second manifold group, and the third manifold group each include an exhaust manifold, and an intake end of the exhaust manifold is connected to two cylinders of the engine.

7. The exhaust manifold assembly according to claim 1, characterized in that: The axis of the exhaust manifold in the first manifold group is in the shape of a smoothly transitioned curve.

8. The exhaust manifold assembly according to claim 1, characterized in that: The exhaust manifolds in the second manifold group and the third manifold group each include a first sub-pipe and a second sub-pipe connected to the first sub-pipe; One end of the first sub-pipe away from the second sub-pipe is connected to the at least one cylinder, and one end of the second sub-pipe away from the first sub-pipe is connected to the exhaust pipe; The angle between the axis of the first sub-pipe and the axis of the second sub-pipe is greater than a preset angle.

9. An engine, characterized in that: The engine comprises the exhaust manifold assembly and a cylinder head according to any one of claims 1 to 8, wherein the exhaust manifold assembly is exposed outside the cylinder head.

10. A vehicle, characterized in that: The vehicle includes the engine of claim 9.

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