Intake manifold assembly, engine intake system, engine and vehicle

Abstract

The invention relates to an air inlet manifold assembly, an engine air inlet system, an engine and a vehicle, and the air inlet manifold assembly comprises a first air cylinder cover, a second air cylinder cover and a third air cylinder cover, the second cylinder cover is provided with at least two second air inlets; the air inlet manifold is provided with a first distribution opening and a second distribution opening, the first distribution opening is communicated with the at least two first air inlets, and the second distribution opening is communicated with the at least two second air inlets. By means of the technical scheme, the air inlet manifold assembly can reduce noise.

Description

Technical Field

[0001] The present disclosure relates to the technical field of engines, and in particular, to an intake manifold assembly, an engine intake system, an engine, and a vehicle. Background Art

[0002] In the related art, the intake manifold assembly includes an intake manifold. Currently, when the intake manifold assembly is working, the noise of the intake manifold is relatively large. Summary of the Invention

[0003] The purpose of the present disclosure is to provide an intake manifold assembly that can reduce noise.

[0004] To achieve the above purpose, according to the first aspect of the embodiments of the present disclosure, there is provided an intake manifold assembly, including: a first cylinder head having at least two first intake ports; a second cylinder head having at least two second intake ports; an intake manifold having a first distribution port and a second distribution port, the first distribution port communicating with at least two of the first intake ports, and the second distribution port communicating with at least two of the second intake ports.

[0005] Further, the intake area of the first distribution port is greater than the sum of the intake areas of at least two of the first intake ports; and / or, the intake area of the second distribution port is greater than the sum of the intake areas of at least two of the second intake ports.

[0006] Further, the intake manifold includes a first distribution pipe and a second distribution pipe, the first distribution pipe having the first distribution port, and the second distribution pipe having the second distribution port, wherein the first distribution pipe and the second distribution pipe are at least of the same length.

[0007] Further, the first distribution pipe and the second distribution pipe are connected through a drainage port, and the distance between the first distribution port and the drainage port is configured as the length of the first distribution pipe; the distance between the second distribution port and the drainage port is configured as the length of the second distribution pipe.

[0008] Further, the first distribution pipe and the second distribution pipe are integrally formed, and the drainage port is provided at the middle of the intake manifold.

[0009] Further, the intake manifold assembly further includes a drainage pipe, the drainage port is provided on the drainage pipe, and the drainage pipe is provided at the middle of the intake manifold.

[0010] Further, the first distribution pipe and the second distribution pipe are at least of equal inner diameter.

[0011] Further, the intake manifold includes a first distribution pipe having a first distribution port, and the first distribution pipe is fastened to the first cylinder head such that the first distribution port is arranged opposite to the first intake port; wherein, the plane where the first intake port is located is arranged parallel to the plane where the first distribution port is located, and at least two of the first intake ports are arranged in the same plane.

[0012] Further, the intake manifold includes a second distribution pipe having a second distribution port, and the second distribution pipe is fastened to the second cylinder head such that the second distribution port is arranged opposite to the second intake port; wherein, the plane where the second intake port is located is arranged parallel to the plane where the second distribution port is located, and at least two of the second intake ports are arranged in the same plane.

[0013] Further, the first cylinder head is provided with a first cavity for communicating with the first cylinder, and the second cylinder head is provided with a second cavity for communicating with the second cylinder, and the number of the first cavity and the second cavity is at least the same.

[0014] Further, at least two first cavities are provided and the first cavities are not communicated with each other; at least two second cavities are provided and the second cavities are not communicated with each other.

[0015] Further, the number of the first intake ports is equal to the number of the first cavities and is at least two, and the first intake ports are communicated with the first cavities in a one-to-one correspondence; the number of the second intake ports is equal to the number of the second cavities and is at least two, and the second intake ports are communicated with the second cavities in a one-to-one correspondence.

[0016] Further, the first distribution pipe, the second distribution pipe and the drain pipe together form a Y-shaped structure.

[0017] Further, a throttle valve is provided on the drain pipe.

[0018] According to a second aspect of the embodiments of the present disclosure, an engine intake system is provided, and the engine intake system includes the above-mentioned intake manifold assembly.

[0019] According to a third aspect of the embodiments of the present disclosure, an engine is provided, which includes the above-mentioned engine intake system.

[0020] Further, the engine is configured as a horizontally opposed engine.

[0021] According to a fourth aspect of the embodiments of the present disclosure, a vehicle is provided, which includes the above-mentioned engine.

[0022] Through the above technical solution, in the intake manifold assembly provided by the present disclosure, since the first distribution port is communicated with at least two first intake ports, therefore, the intake area of the first distribution port will be different from the intake area of at least one first intake port. In this way, when the sound wave is transmitted to the position where the first intake port intersects with the first distribution port, the intake area of the first distribution port is different from the intake area of at least one intake port, which will cause a sudden change in the intake area. Due to the sudden change in the intake area, the acoustic impedance will change. The change in the acoustic impedance causes part of the sound wave to be reflected and part to be transmitted in the cavity of the intake manifold. The reflected sound wave propagates back and forth in the cavity, increasing the propagation path of the sound wave in the medium, thereby consuming sound energy and further reducing the noise of the intake manifold. Similarly, when the second distribution port is communicated with at least two second intake ports, the intake area of the second distribution port will be different from the intake area of at least one second intake port. In this way, the noise of the intake manifold can also be reduced. Therefore, the intake manifold assembly of the present disclosure can reduce noise and improve the user experience.

[0023] Other features and advantages of the present disclosure will be described in detail in the subsequent specific implementation section. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The drawings are used to provide a further understanding of the present disclosure and constitute a part of the specification. Together with the following specific implementation, they are used to explain the present disclosure, but do not constitute a limitation to the present disclosure. In the drawings:

[0025] Figure 1 is a schematic structural diagram of an intake manifold assembly provided by an exemplary embodiment of the present disclosure;

[0026] Figure 2 is an exploded view of an intake manifold assembly provided by an exemplary embodiment of the present disclosure;

[0027] Figure 3 is a diagram showing the mating relationship between the intake manifold and the cylinder head of an intake manifold assembly provided by an exemplary embodiment of the present disclosure;

[0028] Figure 4 is a schematic diagram of the principle of an expansion muffler provided by an exemplary embodiment of the present disclosure;

[0029] Figure 5 is a schematic diagram of the sound pressure theoretical model of an intake manifold assembly provided by an exemplary embodiment of the present disclosure;

[0030] Figure 6 is a noise simulation diagram when the intake area of the distribution port and the first intake port of the intake manifold in the related art is the same;

[0031] Figure 7 is a noise simulation diagram of an intake manifold assembly provided by an exemplary embodiment of the present disclosure;

[0032] Figure 8 It is the standing wave principle diagram provided by the exemplary embodiment of the present disclosure.

[0033] Description of reference numerals

[0034] 1 - intake manifold; 11 - first distribution pipe; 110 - first distribution port; 111 - air outlet; 12 - second distribution pipe; 120 - second distribution port; 130 - drainage port; 2 - first cylinder head; 20 - first intake port; 21 - first cavity; 3 - second cylinder head; 30 - second intake port; 31 - second cavity; 4 - drainage pipe; 5 - throttle valve; 100 - intake manifold assembly. Detailed implementation manners

[0035] The following will describe the detailed implementation manners of the present disclosure with reference to the accompanying drawings. It should be understood that the detailed implementation manners described herein are only for explaining and illustrating the present disclosure, and are not used to limit the present disclosure.

[0036] In the present disclosure, in the following description, when referring to the accompanying drawings, unless otherwise explained, the same reference numerals in different drawings represent the same or similar elements. The above definitions are only for explaining and illustrating the present disclosure, and should not be construed as a limitation to the present disclosure.

[0037] According to the detailed implementation manners of the present disclosure, as shown in Figures 1 to 5 a kind of intake manifold assembly 100 is provided, including: a first cylinder head 2 having at least two first intake ports 20; a second cylinder head 3 having at least two second intake ports 30; an intake manifold 1 having a first distribution port 110 and a second distribution port 120, the first distribution port 110 communicating with at least two first intake ports 20, and the second distribution port 120 communicating with at least two second intake ports 30.

[0038] Through the above technical solution, in the intake manifold assembly 100 provided in the present disclosure, since the first distribution port 110 communicates with at least two first intake ports 20, the intake area of the first distribution port 110 will be different from the intake area of at least one first intake port 20. Thus, when the sound wave propagates to the position where the first intake port 20 and the first distribution port 110 meet, the intake area of the first distribution port 110 is different from the intake area of at least one intake port 20, which will cause a sudden change in the intake area. Due to the sudden change in the intake area, the acoustic impedance will change. The change in the acoustic impedance causes partial reflection and partial transmission of the sound wave in the cavity of the intake manifold. The reflected sound wave propagates back and forth in the cavity, increasing the propagation path of the sound wave in the medium, thereby consuming the sound energy and further reducing the noise of the intake manifold 1. Similarly, when the second distribution port 120 communicates with at least two second intake ports 30, the intake area of the second distribution port 120 will be different from the intake area of at least one second intake port 30. Thus, the noise of the intake manifold can also be reduced. Therefore, the intake manifold assembly 100 of the present disclosure can reduce noise and improve the user experience.

[0039] In some embodiments, the intake area of the first distribution port 110 can be different from the area of each first intake port 20. In this way, the noise reduction effect can be improved. Similarly, the intake area of the second distribution port 120 can be different from the area of each second intake port 30.

[0040] In some embodiments, the intake area of the first distribution port 110 can be greater than the sum of the intake areas of at least two first intake ports 20. In this way, the smoothness and unobstructedness of the intake of the first intake port 20 can be improved.

[0041] In some embodiments, the intake area of the second distribution port 120 can be greater than the sum of the intake areas of at least two second intake ports 30. In this way, the smoothness and unobstructedness of the intake of the second intake port 30 can be improved.

[0042] In some embodiments of the present disclosure, as shown in Figures 1 to 5 the intake manifold 1 includes a first distribution pipe 11 and a second distribution pipe 12. The first distribution pipe 11 has a first distribution port 110, and the second distribution pipe 12 has a second distribution port 120. Among them, the first distribution pipe 11 and the second distribution pipe 12 can have at least the same length.

[0043] Through the above technical solution, in the intake manifold assembly provided by the present disclosure, a first cylinder head 2, a second cylinder head 3, and an intake manifold 1 are provided. Since the intake manifold 1 includes a first distribution pipe 11 and a second distribution pipe 12 that are connected and communicate with each other, and the lengths of the first distribution pipe 11 and the second distribution pipe 12 are the same, when sound waves propagate in the intake manifold 1, for example, when the sound waves in the first distribution pipe 11 and the sound waves in the second distribution pipe 12 propagate in opposite directions, they can cancel each other out. That is to say, the intake noises cancel each other out, thereby playing a role in reducing noise. In addition, since the lengths of the first distribution pipe 11 and the second distribution pipe 12 are the same, it is ensured that the lengths of the flow paths of the gas in the first distribution pipe 11 and the second distribution pipe 12 are the same, which is beneficial to ensuring the consistency of the intake of the first distribution pipe 11 and the second distribution pipe 12.

[0044] In the exemplary embodiment provided by the present disclosure, referring to Figure 2 and Figure 3 as shown, the first distribution pipe 11 and the second distribution pipe 12 are connected and communicate with each other through a drainage port 130. The distance between the first distribution port 110 and the drainage port 130 is configured as the length of the first distribution pipe 11; the distance between the second distribution port 120 and the drainage port 130 is configured as the length of the second distribution pipe 12. Through the above technical solution, since the first distribution pipe 11 and the second distribution pipe 12 are connected and communicate with each other through the drainage port 130, after the gas enters the drainage port 130, it can respectively enter the first distribution pipe 11 and the second distribution pipe 12; since the lengths of the first distribution pipe 11 and the second distribution pipe 12 are the same, the lengths of the gas flowing in the first distribution pipe 11 and the second distribution pipe 12 are the same, which is beneficial to ensuring the consistency of the intake of the first distribution pipe 11 and the second distribution pipe 12.

[0045] In the exemplary embodiment provided by the present disclosure, referring to Figure 2 and Figure 3 as shown, the intake manifold 1 includes a first distribution pipe 11. The first distribution pipe 11 has a first distribution port 110. The first distribution pipe 11 is buckled on the first cylinder head 2 so that the first distribution port 110 is arranged opposite to the first intake port 20; wherein, the plane where the first intake port 20 is located is arranged parallel to the plane where the first distribution port 110 is located, and at least two first intake ports 20 are arranged in the same plane. By setting it like this, the distance from each first intake port 20 to the first distribution port 110 is equal, which makes the distance for the sound waves to propagate between each first intake port 20 and the same first distribution port 110 equal, which is beneficial to reducing the odd-order noise, thereby having the effect of noise elimination and reduction. The specific principle is detailed below.

[0046] In the exemplary embodiment provided by the present disclosure, referring to Figure 2 and Figure 3As shown in , the intake manifold 1 includes a second distribution pipe 12, the second distribution pipe 12 has a second distribution port 120, and the second distribution pipe 12 is buckled on the second cylinder head 3 so that the second distribution port 120 is arranged opposite to the second air intake port 30; wherein, the plane where the second air intake port 30 is located is arranged parallel to the plane where the second distribution port 120 is located, and at least two second air intake ports (30) are arranged in the same plane. By such an arrangement, the distance between each second air intake port 30 and the second distribution port 120 is equal, which makes the distance that the sound wave propagates between each second air intake port 30 and the same second distribution port 120 equal, which is conducive to reducing odd-order noise, thereby having the effect of sound attenuation and noise reduction. The specific principle is detailed below.

[0047] In the present disclosure, since the distance between the first distribution port 110 and the drainage port 130 is constructed as the length of the first distribution pipe 11; the distance between the second distribution port 120 and the drainage port 130 is constructed as the length of the second distribution pipe 12, and the lengths of the first distribution pipe 11 and the second distribution pipe 12 are the same, the propagation distance of the sound wave between the first distribution port 110 and the drainage port 130 is equal to the propagation distance of the sound wave between the second distribution port 120 and the drainage port 130, which is beneficial to reducing the half-order noise component, thereby achieving the effect of sound elimination. The specific principle process is detailed below.

[0048] Reference Figure 2 、 Figure 3 and Figure 5 As shown in , the following takes the first cylinder head 2 having two first air inlets 20 and the second cylinder head 3 having two second air inlets 30 as an example for further explanation:

[0049] The distances between the two first air inlets 20 and the first distribution port 110 can be expressed as l1 and l3 respectively, and the distance between the first distribution port 110 and the drainage port 130 can be expressed as l 13 Similarly, the distances between the two second air inlets 30 and the second distribution port 120 are expressed as l2 and l4, respectively, and the distance between the second distribution port 120 and the drainage port 130 is expressed as l 24 , the sound pressure at the first distribution port 110 can be used as a reference (i.e., as the sound source of the noise), and the sound pressure at any point in the intake manifold 1 can be expressed by the following equations:

[0050]

[0051] Where (θ, x) is the coordinate of the propagation position, the sound pressure in the intake manifold 1 can be expressed by the sound pressure formula (2), that is:

[0052] Among them, p(θ ) is the sound pressure, PA is the sound pressure amplitude of the incident wave, P B is the sound pressure amplitude of the reflected wave; m is the order of the sound wave; j is the exponential form of the complex number; c is the speed of sound; ω is the angular frequency of the sound wave.

[0053] When the order m of the sound wave is an odd order, for example, when m is 1 or 3, formula (2) can be transformed into formula (3), that is:

[0054]

[0055] It can be seen from formula (3) that by reducing the length difference between l1 and l3, or the length difference between l2 and l4, the value of p(θ) can be reduced, that is, the odd-order noise component is reduced, playing a role in noise reduction; when l1 is equal to l3, and l2 is equal to l4, the value of p(θ) is zero. In this case, the odd-order noise components in the intake manifold 1, such as the first-order noise, can be cancelled out, playing a role in sound elimination. That is to say, by making the distance from each first intake port 20 to the first distribution port 110 equal, and making the distance from each second intake port 30 to the second distribution port 120 equal, the overall noise reduction effect of the intake manifold 1 can be improved.

[0056] When the order m of the sound wave is a half-order, for example, when m is 0.5 or 1.5, formula (2) can be transformed into formula (4), that is:

[0057]

[0058] It can be seen from formula (4) that by setting the lengths of l1, l2, l3 and l4, the sound pressure magnitude can be changed. For example, when l1, l2, l3 and l4 are all equal, and l 13 is equal to l 24 According to formula (4), the value of p(θ) is zero. In this case, the half-order noise components in the intake manifold 1, such as the 0.5-order noise, can be cancelled out to reduce the half-order noise. That is to say, make the distance from each first intake port 20 to the first distribution port 110 equal, the distance from each second intake port 30 to the second distribution port 120 equal, the distance from the first intake port 20 to the first distribution port 110 equal to the distance from the second intake port 30 to the second distribution port 120, and on this basis, by making the lengths of the first distribution pipe 11 and the second distribution pipe 12 the same, the half-order noise component can be reduced (refer to Figure 7 shown in), thereby improving the noise reduction effect.

[0059] Refer to Figure 6 and Figure 7 shown in, where Figure 6 is the noise simulation diagram of the intake manifold 1 in the related technology; Figure 7This is the noise simulation diagram of the intake manifold 1 of the present disclosure. Different colors in the figure represent different sound pressure levels. The closer to red, the higher the sound pressure level; the closer to blue, the lower the sound pressure level. Through Figure 6 and Figure 7 it can be seen that, compared with the intake manifold 1 in the related art, the sound pressure levels of the half-order components and odd-order components in the noise of the intake manifold 1 of the present disclosure are significantly reduced. That is to say, the present disclosure reduces the odd-order and half-order noises of the intake manifold 1, has a sound absorption effect, which is beneficial to improving the sound quality of the noise during intake.

[0060] In an exemplary embodiment provided by the present disclosure, referring to Figure 2 and Figure 3 as shown, the first distribution pipe 11 and the second distribution pipe 12 can be integrally formed, and the drainage port 130 is arranged at the middle of the intake manifold 1. The integrally formed manner ensures the strength of the intake manifold. When the first distribution pipe 11 and the second distribution pipe 12 are integrally formed, the drainage port 130 can be opened at the middle of the intake manifold 1. In this way, the gas can enter the first distribution pipe 11 and the second distribution pipe 12 more evenly through the drainage port 130, ensuring the consistency of intake.

[0061] In another exemplary embodiment provided by the present disclosure, referring to Figure 1 and Figure 2 as shown, the intake manifold assembly 100 may further include a drainage pipe 4, the drainage port 130 is arranged on the drainage pipe 4, and the drainage pipe 4 is arranged at the middle of the intake manifold 1. Among them, the drainage pipe 4 is used to guide the flow direction of the gas. By arranging the drainage pipe 4 at the middle of the intake manifold 1, the distance between the first distribution port 110 and the drainage port 130 is equal to the distance between the second distribution port 120 and the drainage port 130. According to the above formula (4), this is beneficial to canceling out the half-order noise components of the sound pressure in the intake manifold 1, so as to achieve the purpose of noise reduction.

[0062] In the exemplary embodiments provided by the present disclosure, referring to Figure 2 and Figure 3 as shown, the first distribution pipe 11 and the second distribution pipe 12 have at least equal inner diameters. By setting like this, it is beneficial to improve the structural consistency of the first distribution pipe 11 and the second distribution pipe 12. In this way, it is beneficial to improve the consistency of intake during the intake process.

[0063] To improve the noise reduction effect, the intake area of the first distribution port 110 can be set to be different from the intake area of the first intake port 20; the intake area of the second distribution port 120 can be set to be different from the intake area of the second intake port 30. In this way, when the sound wave is transmitted between the first distribution port 110 and the first intake port 20, for example, when the sound wave is transmitted from the first intake port 20 to the first distribution port 110, when the sound wave reaches the position where the first intake port 20 and the first distribution port 110 meet, the intake area will change suddenly. Due to the sudden change of the intake area, the acoustic impedance will change. The change of the acoustic impedance causes partial reflection and partial transmission of the sound wave in the cavity of the intake manifold 1. The reflected sound wave propagates back and forth in the cavity, increasing the propagation path of the sound wave in the medium, thereby consuming the sound energy and further reducing the noise of the intake manifold 1.

[0064] It should be noted that the intake area of the first distribution port 110 being different from the intake area of the first intake port 20 can be understood as that the intake area of the first distribution port 110 is larger than the intake area of the first intake port 20, or the intake area of the first distribution port 110 is smaller than the intake area of the first intake port 20. As long as it can satisfy the sudden change of the intake area during the transmission of the sound wave, causing the sound wave to be reflected, so that the sound energy can be consumed, the present disclosure does not make specific limitations on this; similarly, the intake area of the second distribution port 120 being different from the intake area of the second intake port 30 can be understood as that the intake area of the second distribution port 120 is larger than the intake area of the second intake port 30, or the intake area of the second distribution port 120 is smaller than the intake area of the second intake port 30.

[0065] In the exemplary embodiment provided by the present disclosure, referring to Figure 2 as shown in, the intake area of the first distribution port 110 can be larger than the intake area of the first intake port 20. By setting it in this way, it is beneficial to increase the air supply area of the first distribution port 110 to the first intake port 20, making the first distribution port 110 and the first intake port 20 better connected, so that the air flow can circulate smoothly during intake. Similarly, the intake area of the second distribution port 120 can be larger than the intake area of the second intake port 30, making the second distribution port 120 and the second intake port 30 better connected.

[0066] In the present disclosure, since the intake area of the first distribution port 110 is larger than the intake area of the first intake port 20, when the sound wave is transmitted from the first intake port 20 to the first distribution port 110, the sound wave first encounters the port with a smaller intake area, that is, the first intake port 20, and then the sound wave enters a port with a larger intake area, that is, the first distribution port 110. In this way, due to the sudden increase in the intake area, a reflection phenomenon will occur. After multiple reflections of the sound wave, the sound wave energies interfere with each other, and part of the sound energy is consumed. In addition, when the sound wave propagates from the first intake port 20 with a smaller intake area to the first distribution port 110 with a larger intake area, it will encounter a change in acoustic impedance, and the acoustic impedance increases, which is beneficial to the consumption of sound energy. Similarly, the intake area of the second distribution port 120 is larger than the intake area of the second intake port 30, which also plays the role of consuming sound energy as described above.

[0067] In the exemplary embodiment provided by the present disclosure, referring to Figure 2 and Figure 3 as shown, the intake area of the first distribution port 110 can be larger than the sum of the intake areas of at least two first intake ports 20. By setting it in this way, the two first intake ports 20 and the first distribution port 110 respectively form two expansion mufflers. Similarly, the intake area of the second distribution port 120 is larger than the sum of the intake areas of at least two second intake ports 30, and the two second intake ports 30 and the second distribution port 120 respectively form two expansion mufflers. Figure 4 It is a schematic diagram of an expansion muffler. Taking the intake area of the first distribution port 110 being larger than the sum of the intake areas of at least two first intake ports 20 as an example, the present disclosure is elaborated as follows:

[0068] Referring to Figure 4 as shown, where D1 represents the diameter of the first intake port 20, D2 represents the diameter of the first distribution port 110, the intake area of the first intake port 20 can be S1, the intake area of the first distribution port 110 can be S2, and the expansion ratio m = S2 / S1. Then, the transmission loss of the sound wave transmitted from the first intake port 20 to the first distribution port 110 satisfies the following formula (1), that is:

[0069] where m is the expansion ratio, TL is the transmission loss, and the larger the TL value, the greater the noise reduction effect. It can be seen from this that the transmission loss (i.e., the noise reduction ability) of the sound wave transmitted from the first intake port 20 to the first distribution port 110 increases with the increase of the expansion ratio. By making the intake area of the first distribution port 110 larger than the sum of the intake areas of at least two first intake ports 20, the expansion ratio m > 2 is achieved, the noise reduction amount is increased, and the noise reduction effect is improved.

[0070] It should be noted that two, three or more than three first air inlets 20 can be formed on the first cylinder head 2. Understandably, the value of the expansion ratio m is specifically set according to the number of the first air inlets 20 on the first cylinder head 2. For example, when three first air inlets 20 are formed on the first cylinder head 2, the intake area of the first distribution port 110 is greater than the sum of the intake areas of the three first air inlets 20. At this time, the expansion ratio m>3, and so on. The present disclosure will not elaborate on this.

[0071] In addition, compared with the intake area of the first distribution port 110 being smaller than the intake area of the first air inlet 20, the intake area of the first distribution port 110 in the present disclosure is greater than the sum of the intake areas of at least two first air inlets 20, which increases the space for gas flow during intake, improves the intake efficiency, and enables each first air inlet 20 to be well connected to the first distribution port 110, ensuring that gas can smoothly and evenly enter each first distribution port 110 during intake.

[0072] In the present disclosure, referring to Figure 2 and Figure 3 as shown, at least two first air inlets 20 can be provided on the first cylinder head 2. Each first air inlet 20 is used to communicate with a first cylinder. The first cylinder head 2 is buckled to the first distribution pipe 11, and the first distribution port 110 is communicated with at least two first air inlets 20. Among them, each first air inlet 20 satisfies that the intake area of the first distribution port 110 is greater than the intake area of the first air inlet 20. Thus, since each first air inlet 20 is used to communicate with a first cylinder, when the first cylinder operates to generate noise and the sound wave is transmitted from the first air inlet 20 to the first distribution port 110, the acoustic impedance will increase due to the sudden increase in the intake area, consuming the sound energy, thereby playing a role in noise reduction.

[0073] Similarly, referring to Figure 2 and Figure 3 as shown, at least two second air inlets 30 can be provided on the second cylinder head 3. Each second air inlet 30 is used to communicate with a second cylinder. The second cylinder head 3 is buckled to the second distribution pipe 12, and the second distribution port 120 is communicated with at least two second air inlets 30. Among them, each second air inlet 30 satisfies that the intake area of the second distribution port 120 is greater than the intake area of the second air inlet 30, increasing the acoustic impedance and consuming the sound energy, thereby playing a role in noise reduction.

[0074] In the present disclosure, the first distribution port 110 can be connected to at least two first intake ports 20. Compared with the connection of the first distribution port 110 to one first intake port 20, arranging at least two first intake ports 20 on one first cylinder head 2 is beneficial to improving the structural compactness. Among them, the first cylinder head 2 can be hermetically connected to the first distribution pipe 11 to improve the sealing performance of the intake manifold assembly 100.

[0075] Similarly, the second distribution port 120 can be connected to at least two second intake ports 30. Compared with the connection of the second distribution port 120 to one second intake port 30, arranging at least two second intake ports 30 on one second cylinder head 3 is beneficial to improving the structural compactness. Among them, the second cylinder head 3 can be hermetically connected to the second distribution pipe 12 to improve the sealing performance of the intake manifold assembly 100.

[0076] In the exemplary embodiment provided by the present disclosure, referring to Figure 2 and Figure 3 as shown in, the first cylinder head 2 can be provided with a first cavity 21 for communicating with the first cylinder. The second cylinder head 3 can be provided with a second cavity 31 for communicating with the second cylinder. The number of the first cavity 21 and the second cavity 31 is at least the same. Among them, both the first cavity 21 and the second cavity 31 are used to accommodate gas. The gas entering the first distribution pipe 11 is distributed into each first cavity 21, and the gas entering the second distribution pipe 12 is distributed into each second cavity 31.

[0077] In the exemplary embodiment provided by the present disclosure, there are at least two first cavities 21 and the first cavities 21 are not communicated with each other; there are at least two second cavities 31 and the second cavities 31 are not communicated with each other. By such an arrangement, each first cylinder and each second cylinder can work independently without interference, ensuring the stability during the use of the intake manifold 1.

[0078] In the exemplary embodiment provided by the present disclosure, referring to Figures 1 to 3 as shown in, the number of the first intake ports 20 and the first cavities 21 is equal and at least two, and the first intake ports 20 are communicated with the first cavities 21 in a one-to-one correspondence; the number of the second intake ports 30 and the second cavities 31 is equal and at least two, and the second intake ports 30 are communicated with the second cavities 31 in a one-to-one correspondence. By such an arrangement, the gas entering the first distribution pipe 11 enters the corresponding first cavity 21 through the first intake port 20, and the gas entering the second distribution pipe 12 enters the corresponding second cavity 31 through the second intake port 30.

[0079] In the exemplary embodiment provided by the present disclosure, referring to Figure 1 and Figure 2As shown, the first distribution pipe 11, the second distribution pipe 12, and the drainage pipe 4 are jointly configured as a Y-shaped structure. That is to say, the first distribution pipe 11 and the second distribution pipe 12 are symmetrically arranged relative to the drainage pipe 4. In this way, the gas entering the drainage pipe 4 can be evenly distributed into the first distribution pipe 11 and the second distribution pipe 12, improving the stability of the intake of the intake manifold assembly 100.

[0080] In the exemplary embodiment provided by the present disclosure, referring to Figure 1 and Figure 2 As shown, a throttle valve 5 can be provided on the drainage pipe 4, and the throttle valve 5 is used to control the intake air flow of the drainage pipe 4.

[0081] In order to improve the noise reduction effect of the intake manifold assembly 100, the length of the drainage pipe 4 can be set to have a preset length, which can be expressed as L5, and the diameter of the drainage pipe 4 is D3. When the sound wave is transmitted from the intake manifold 1 to the drainage pipe 4, the sound wave entering the drainage pipe 4 from the drainage port 130 is the incident wave. When the sound wave is transmitted to the throttle valve 5, a reflected wave will be formed. The incident wave and the reflected wave will be superimposed to form a composite wave. Among them, the frequency of the incident wave sound wave can be expressed as f1. When the formula (5) is satisfied, that is, when is satisfied, the composite wave is a standing wave. Referring to Figure 8 As shown, Figure 8 is the schematic diagram of the generation of the standing wave in the drainage pipe 4. At this time, the sound pressure levels at the drainage port 130 (i.e., χ = 0) and the throttle valve 5 (i.e., χ = L5) are both zero, achieving the purpose of eliminating the incident wave of the intake manifold 1, which is beneficial to reducing the overall noise of the intake manifold assembly 100. Among them, c in the formula (5) is the speed of sound.

[0082] As can be seen from the above, in the case where the diameter D3 of the drainage pipe 4 is a fixed value, the frequency of the incident wave sound wave can be changed by setting the length of the drainage pipe 4, that is, setting L5. Specifically, the sound pressure distribution curve of other parts of the intake manifold assembly 100 except the drainage pipe 4 can be simulated and calculated first to obtain f1. According to the above formula (5), the formula (6) can be obtained, that is By substituting f1 into the formula (6), the optimal length of the drainage pipe 4 can be obtained, that is, the optimal value of L5 can be obtained, so that the incident wave and the reflected wave are superimposed to form a standing wave, which can reduce the sound pressure of the intake manifold assembly 100 to a greater extent, thereby achieving the sound elimination effect.

[0083] In the second aspect of the present disclosure, an engine intake system is further provided. The engine intake system includes the above-mentioned intake manifold assembly 100. This engine intake system also has all the advantages of the above-mentioned intake manifold assembly 100, which will not be elaborated herein by the present disclosure.

[0084] In a third aspect of the present disclosure, an engine is further provided, comprising the above-mentioned engine air intake system. The engine has all the beneficial effects of the above-mentioned engine air intake system, which will not be described in detail in this disclosure.

[0085] In the exemplary embodiments provided by the present disclosure, the engine may be configured as a horizontally opposed engine. The horizontally opposed engine has a low center of gravity and is more easily able to achieve overall balance.

[0086] A fourth aspect of the present disclosure further provides a vehicle comprising the aforementioned engine. The vehicle has all the beneficial effects of the aforementioned engine, which are not further described in detail in the present disclosure.

[0087] Reference Figures 1 to 8 As shown in , the noise reduction principle of the intake manifold assembly provided by the present disclosure will be described in detail below:

[0088] First, during intake, the gas enters the drainage pipe 4 from the throttle valve 5 and flows to the drainage port 130 through the drainage pipe 4. Then, the gas enters the first distribution pipe 11 and the second distribution pipe 12 respectively through the drainage port 130. Then, the gas entering the first distribution pipe 11 is distributed to each first air intake port 20 through the first distribution port 110. After that, the gas enters the corresponding first cavity 21 through the first air intake port 20 to supply gas to the corresponding first cylinder. At the same time, the gas entering the second distribution pipe 12 is distributed to each second air intake port 30 through the second distribution port 120, and enters the corresponding second cavity 31 through the second air intake port 30 to supply gas to the corresponding second cylinder. At this point, the intake process of the intake manifold assembly 100 is completed.

[0089] In the above-mentioned intake process, when the sound wave at the first cylinder is transmitted to the first distribution pipe 11, since the intake area of the first distribution port 110 is larger than the intake area of the first intake port 20, according to the principle of the expansion type muffler, at the intersection of the first intake port 20 and the first distribution port 110, the intake area will suddenly increase, so that the acoustic impedance increases, the sound energy is consumed, and thus a noise reduction effect is achieved; on this basis, when at least two first intake ports 20 are formed on the first cylinder head 2, since the distance between each first intake port 20 and the first distribution port 110 is equal, this makes The distance that the sound wave propagates between each first air inlet 20 and the first distribution port 110 is equal. Through the above analysis, it can be seen that this is conducive to reducing odd-order noise, thereby playing a role in noise reduction. In this way, the intake manifold 1 of the present invention plays at least two noise reduction functions in the process of transmitting the sound wave at the first cylinder to the first distribution pipe 11, and at least two noise reduction functions overlap, that is, the two noise reductions work together, and the noise reduction effect is better. Similarly, the intake manifold 1 of the present invention also plays at least two noise reduction functions in the process of transmitting the sound wave at the second cylinder to the second distribution pipe 12.

[0090] When the sound waves at the first cylinder and the sound waves at the second cylinder are respectively transmitted to the diversion port 130, since the distance between the first distribution port 110 and the diversion port 130 is equal to the distance between the second distribution port 120 and the diversion port 130, the propagation distances of the sound waves when transmitted from the first distribution port 110 and the second distribution port 120 to the diversion port 130 are equal. From the above analysis, it can be seen that this is beneficial to reducing the semi-order noise component, thereby playing a role in primary noise reduction.

[0091] On this basis, by setting the length of the diversion pipe 4, when the sound waves in the intake manifold 1 are transmitted to the throttle valve 5, the incident wave entering the diversion pipe 4 from the diversion port 130 and the reflected wave formed at the throttle valve 5 are superimposed to form a standing wave, thereby reducing the overall noise of the intake manifold assembly 100.

[0092] It can be seen from this that the intake manifold assembly 100 of the present disclosure has multiple noise reduction functions, making the overall intake manifold assembly 100 of the present disclosure have less noise.

[0093] Referring to Figure 6 and Figure 7 as shown in Figure 6 is the noise simulation diagram of the intake manifold in the related art. The distribution port of this intake manifold is only connected to the intake port, that is, the distribution port and the intake port are connected one by one, and the intake area of the distribution port is equal to the intake area of the intake port; Figure 7 is the noise simulation diagram of the intake manifold assembly of the present disclosure. The intake area of the first distribution port 110 of the intake manifold assembly of the present disclosure is different from the intake area of the first intake port 20, and the intake area of the second distribution port 120 is different from the intake area of the second intake port 30. At least two first intake ports 20 are provided on one first cylinder head 2 of the present disclosure, and the distance from each first intake port 20 to the first distribution port 110 is equal; at least two second intake ports 30 are provided on one second cylinder head 3 of the present disclosure, and the distance from each second intake port 30 to the second distribution port 120 is equal. By comparing Figure 6 and Figure 7 it can be seen that Figure 6 in the noise simulation diagram, the area corresponding to the odd-order noise component (such as the 3rd order) is yellow, while Figure 7 in the noise simulation diagram, the area corresponding to the odd-order noise component (3rd order) is green. Since different colors in the figure represent the magnitude of the sound pressure level, specifically, the closer the color is to red, the greater the sound pressure level and the greater the noise; the closer the color is to blue, the smaller the sound pressure level and the smaller the noise. Since green is closer to blue than yellow, therefore, compared with Figure 6 (that is, the intake manifold of the related art), the intake manifold assembly of the present disclosure reduces the odd-order noise component by making the distance from each intake port on the same cylinder head to the same distribution port equal, and the noise is smaller.

[0094] Similarly, by comparing Figure 6 and Figure 7 it can be seen that Figure 6 in the noise simulation diagram of [[[ID=]], the area corresponding to the half-order noise component (e.g., 3.5 order) is yellow, while Figure 7 in the noise simulation diagram of [[[ID=]], the area corresponding to the half-order noise component (3.5 order) is green. Since green is closer to blue than yellow, therefore, compared with Figure 6 (i.e., the intake manifold of the related art), the present application reduces the half-order noise component and has less noise.

[0095] The preferred embodiments of the present disclosure have been described in detail above in conjunction with the accompanying drawings. However, the present disclosure is not limited to the specific details in the above embodiments. Within the scope of the technical concept of the present disclosure, various simple modifications can be made to the technical solutions of the present disclosure, and these simple modifications all fall within the protection scope of the present disclosure.

[0096] In addition, it should be noted that, in the case of no contradiction, the various specific technical features described in the above specific embodiments can be combined in any suitable manner. To avoid unnecessary repetition, the present disclosure will not separately describe various possible combination manners.

[0097] Furthermore, any combination can be made between various different embodiments of the present disclosure as long as it does not violate the idea of the present disclosure, and it should also be regarded as the content disclosed by the present disclosure.

Claims

1. An intake manifold assembly, characterized in that, Comprising: A first cylinder head (2) having at least two first air inlets (20); A second cylinder head (3) having at least two second air inlets (30); An intake manifold (1) having a first distribution port (110) and a second distribution port (120), the first distribution port (110) communicating with at least two of the first air inlets (20), and the second distribution port (120) communicating with at least two of the second air inlets (30).

2. The intake manifold assembly according to claim 1, wherein The intake area of the first distribution port (110) is greater than the sum of the intake areas of at least two of the first air inlets (20); and / or, the intake area of the second distribution port (120) is greater than the sum of the intake areas of at least two of the second air inlets (30).

3. The intake manifold assembly according to claim 1, wherein, The intake manifold (1) includes a first distribution pipe (11) and a second distribution pipe (12), the first distribution pipe (11) having the first distribution port (110), and the second distribution pipe (12) having the second distribution port (120), wherein the first distribution pipe (11) and the second distribution pipe (12) are at least of the same length.

4. The intake manifold assembly according to claim 3, characterized in that, The first distribution pipe (11) and the second distribution pipe (12) are communicated through a drainage port (130), The distance between the first distribution port (110) and the drainage port (130) is configured as the length of the first distribution pipe (11); the distance between the second distribution port (120) and the drainage port (130) is configured as the length of the second distribution pipe (12).

5. The intake manifold assembly according to claim 4, wherein, The first distribution pipe (11) and the second distribution pipe (12) are integrally formed, and the drainage port (130) is provided at the middle of the intake manifold (1).

6. The intake manifold assembly according to claim 4, characterized in that, The intake manifold assembly (100) further includes a drainage pipe (4), the drainage port (130) is provided on the drainage pipe (4), and the drainage pipe (4) is provided at the middle of the intake manifold (1).

7. The intake manifold assembly according to claim 6, characterized in that, The first distribution pipe (11) and the second distribution pipe (12) are at least of equal inner diameter.

8. The intake manifold assembly according to claim 1, wherein, The intake manifold (1) includes a first distribution pipe (11), the first distribution pipe (11) having the first distribution port (110), and the first distribution pipe (11) is fastened to the first cylinder head (2) so that the first distribution port (110) and the first air inlet (20) are arranged opposite to each other; wherein, the plane where the first air inlet (20) is located is arranged parallel to the plane where the first distribution port (110) is located, and at least two of the first air inlets (20) are arranged in the same plane.

9. The intake manifold assembly according to claim 1 or 8, characterized in that, The intake manifold (1) includes a second distribution pipe (12), the second distribution pipe (12) having the second distribution port (120), and the second distribution pipe (12) is fastened to the second cylinder head (3) so that the second distribution port (120) and the second air inlet (30) are arranged opposite to each other; wherein, the plane where the second air inlet (30) is located is arranged parallel to the plane where the second distribution port (120) is located, and at least two of the second air inlets (30) are arranged in the same plane.

10. The intake manifold assembly according to any one of claims 1-8, characterized in that, The first cylinder head (2) is provided with a first cavity (21), and the first cavity (21) is used for communicating with the first cylinder. The second cylinder head (3) is provided with a second cavity (31), and the second cavity (31) is used for communicating with the second cylinder. The number of the first cavities (21) and the second cavities (31) is at least the same.

11. The intake manifold assembly according to claim 10, characterized in that, There are at least two first cavities (21), and the first cavities (21) are not communicated with each other; there are at least two second cavities (31), and the second cavities (31) are not communicated with each other.

12. The intake manifold assembly according to claim 10, characterized in that, The number of the first air inlets (20) is equal to that of the first cavities (21) and is at least two, and the first air inlets (20) are communicated with the first cavities (21) in a one-to-one correspondence. The number of the second air inlets (30) is equal to that of the second cavities (31) and is at least two, and the second air inlets (30) are communicated with the second cavities (31) in a one-to-one correspondence.

13. The intake manifold assembly according to claim 6, characterized in that, The first distribution pipe (11), the second distribution pipe (12) and the drainage pipe (4) together form a Y-shaped structure.

14. The intake manifold assembly according to claim 6, wherein A throttle valve (5) is arranged on the drainage pipe (4).

15. An engine intake system, characterized in that, The engine intake system includes the intake manifold assembly (100) according to any one of claims 1 to 14.

16. An engine, characterized in that, It includes the engine intake system according to claim 15.

17. The engine according to claim 16, characterized in that, The engine is configured as a horizontally opposed engine.

18. A vehicle, characterized in that, It includes the engine according to claim 16 or 17.

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