Intake manifold and engine

Abstract

The utility model provides an intake manifold and an engine, and relates to the technical field of engines. A first air channel of an air inlet manifold body is in a U shape, an air inlet pipe is connected with the first air channel at the middle section of the first air channel, and a second air channel is connected to the first air channel at the downstream of the air flow direction. The air outlet is an opening where the second air channel is connected with an engine inlet. The intake manifold body is formed by assembling an upper part and a lower part which are opposite to each other, and one air outlet is connected with at least two engine cylinder inlets. According to the technical scheme, the first air channel of the intake manifold body is arranged to be in the U shape, due to the fact that the appearance of the intake manifold body is long and thin, and at least two engine air cylinder inlets share one air outlet, the occupied space can be effectively reduced. In addition, the intake manifold main body is formed by assembling the upper part and the lower part which are opposite to each other, so that the manufacturing process of the intake manifold is simplified, and the manufacturing cost is saved.

Description

Technical Field

[0001] The utility model relates to the technical field of engines, in particular to an intake manifold and an engine. Background Art

[0002] The existing horizontally opposed intake manifold structure is as follows Figure 1 As shown, the intake manifold is used in internal combustion engines to evenly distribute air to the intake ducts of each cylinder in the engine. A traditional horizontally opposed intake manifold consists of an intake port, a surge chamber, and two air ducts on each side. Air enters the surge chamber from the intake port and is then distributed to the four air ducts through the surge chamber. This intake manifold structure has the following problems:

[0003] 1. The traditional air intake system occupies a large space in the vehicle, resulting in more space in the engine compartment, which may affect the layout of other components in the engine compartment;

[0004] 2. A larger intake manifold means heavier material usage, which increases the weight of the entire engine and negatively impacts vehicle fuel economy;

[0005] 3. The space occupied by the intake manifold also affects the overall design and performance of the vehicle. A compact engine compartment layout can reduce the vehicle's wind resistance and improve the vehicle's dynamic performance. If the intake manifold occupies a large space, it may limit the flexibility of the vehicle design.

[0006] 4. The manufacturing process is complicated and the cost is relatively high. Utility Model Content

[0007] One purpose of the utility model is to provide an intake manifold to solve the technical problem in the prior art that the intake manifold occupies a larger space.

[0008] A further object of the present invention is to improve the uniformity of cylinder air intake.

[0009] Another object of the present invention is to provide an engine having the above-mentioned intake manifold.

[0010] In particular, the present invention provides an intake manifold, comprising an intake pipe and an intake manifold body, wherein the intake manifold body comprises:

[0011] a first air passage, wherein the first air passage is U-shaped, and the air inlet pipe is connected to the first air passage at a middle section thereof;

[0012] a second air passage, the second air passage being connected to the first air passage downstream in the gas flow direction;

[0013] and an air outlet, the air outlet being configured as an opening for connecting the second air passage with the engine cylinder;

[0014] The intake manifold body is assembled from two upper and lower opposite parts;

[0015] One of the air outlets is connected to at least two engine cylinder inlets.

[0016] Optionally, the second air channel has a plurality of sub-air channels, and the airflow entering the sub-air channels enters the cylinder through the air outlet.

[0017] Optionally, the intake manifold housing body is provided with at least one limiting structure, and the limiting structure is located at the air outlet of the second air duct, dividing the second air duct into a plurality of sub-air ducts.

[0018] Optionally, after the intake manifold is assembled on the cylinder, the limiting structure is located between the inlets of two engine cylinders.

[0019] Optionally, each of the limiting structures is columnar.

[0020] Each of the limiting structures is provided with a bolt hole, so that a bolt can be connected to the engine through the bolt hole.

[0021] Optionally, the intake manifold body includes a first shell and a second shell that cooperate with each other, the first shell and the second shell are both U-shaped, the first shell is provided with the air inlet, and the second shell is provided with the air outlet.

[0022] Optionally, a plurality of connecting parts are provided on the first shell and the second shell, and the connecting parts are connected to the engine.

[0023] Optionally, a plurality of first connection portions are provided on the second shell and arranged around each of the air outlets.

[0024] Optionally, the air intake pipe is arranged obliquely relative to the first shell.

[0025] Optionally, a first round chamfer is provided at a connection between the air intake pipe and the first shell, and a radius of the first round chamfer on a side where the air intake pipe forms an acute angle with the first shell is smaller than a radius of the first round chamfer on the other side.

[0026] Optionally, the distances from the air inlet to the corresponding cylinder inlets on both sides are equal. Optionally, a flow guide structure is provided at a position of the first shell defining the second air channel, so that the air flow enters the multiple sub-air channels evenly.

[0027] In particular, the present invention also provides an engine comprising the above-mentioned intake manifold.

[0028] In the present invention, the first air duct of the intake manifold body is U-shaped, the intake pipe is connected to the first air duct in the middle section, and the second air duct is connected to the first air duct downstream of the gas flow. The air outlet is set as the opening connecting the second air duct and the engine inlet. The intake manifold body is assembled from two parts facing each other, and one air outlet is connected to at least two engine cylinder inlets. The above technical solution sets the first air duct of the intake manifold body in a U shape. Since the intake manifold body has a slender appearance and at least two engine cylinder inlets share one air outlet, the space occupied can be effectively reduced. In addition, the intake manifold body is assembled from two parts facing each other, which simplifies the manufacturing process of the intake manifold and saves manufacturing costs.

[0029] Furthermore, the second air duct in the present invention comprises multiple sub-air ducts, with airflow entering the sub-air ducts entering the cylinders through outlets. This technical solution eliminates the traditional multiple independent air ducts and instead incorporates at least one integrated air duct, where the first air duct connects to the multiple sub-air ducts. This integrated air duct allows for premixing of air, thereby improving the uniformity of air intake within the engine cylinders.

[0030] Based on the following detailed description of specific embodiments of the present invention in conjunction with the accompanying drawings, those skilled in the art will become more aware of the above and other objects, advantages and features of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Hereinafter, some specific embodiments of the present invention will be described in detail in an exemplary and non-limiting manner with reference to the accompanying drawings. The same reference numerals in the accompanying drawings indicate the same or similar components or parts. It should be understood by those skilled in the art that these drawings are not necessarily drawn to scale. In the accompanying drawings:

[0032] Figure 1 It is a schematic structural diagram of an intake manifold in the prior art;

[0033] Figure 2 This is a schematic structural diagram of an intake manifold according to an embodiment of the present invention from one angle;

[0034] Figure 3 is a schematic structural diagram of an intake manifold according to an embodiment of the present invention from another angle;

[0035] Figure 4 is a schematic diagram of airflow in an intake manifold according to an embodiment of the present utility model;

[0036] Figure 5 is a schematic structural diagram of an air outlet of an intake manifold according to an embodiment of the present utility model;

[0037] Figure 6 is a schematic structural diagram of a second housing according to an embodiment of the present utility model;

[0038] Figure 7 is a schematic structural diagram of a first housing according to an embodiment of the present utility model;

[0039] Figure 8 is a schematic top view of an intake manifold according to one embodiment of the present invention;

[0040] Figure 9 yes Figure 8 a schematic cross-sectional view taken along AA;

[0041] Figure 10 is a schematic cross-sectional view of an air intake pipe according to an embodiment of the present utility model;

[0042] Figure 11 is a schematic bottom view of an intake manifold according to one embodiment of the present invention;

[0043] Figure 12 yes Figure 11 A schematic cross-sectional view along the middle line BB;

[0044] Figure 13 yes Figure 11 Schematic cross-sectional view along CC.

[0045] Reference numerals:

[0046] 100-intake manifold, 10-intake manifold body, 20-intake pipe, 11-first shell, 12-second shell, 13-air inlet, 14-air outlet, 15-limiting structure, 16-first air duct, 17-second air duct, 171-sub-air duct, 111-second connecting part, 112-through hole, 113-flow-guiding structure, 121-first connecting part, 122-second round chamfer, 21-first round chamfer. DETAILED DESCRIPTION

[0047] The following describes in detail embodiments of the present invention, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to explain the present invention, and should not be construed as limiting the present invention.

[0048] In the description of the present invention, it should be understood that the terms "up", "down", "left", "right", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0049] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features, that is, include one or more of the features. In the description of the present utility model, "plurality" means at least two, such as two, three, etc., unless otherwise clearly and specifically defined. When a feature "includes or contains" one or more of the features it covers, unless otherwise specifically described, this indicates that other features are not excluded and may further include other features.

[0050] Unless otherwise specified or limited, the terms "connection" and "installation" should be interpreted broadly. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, or indirect connection through an intermediate medium; internal communication between two components, or interaction between two components, unless otherwise specified. A person of ordinary skill in the art should be able to understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0051] Unless otherwise defined, all terms (including technical terms and scientific terms) used in the description of this embodiment have the same meaning as commonly understood by ordinary technicians in the technical field to which this application belongs.

[0052] Figure 1 1 is a schematic structural diagram of an intake manifold 100 in the prior art. Figure 1 As shown, in the prior art, the intake manifold includes an air inlet, a pressure-surge chamber 2, and four air ducts 3 located on either side of the pressure-surge chamber 1. Airflow enters the pressure-surge chamber 2 from the air inlet and is then distributed to the four air ducts 3 through the pressure-surge chamber 2. In the prior art, the intake manifold occupies a large space within the vehicle, resulting in increased engine compartment space and affecting the layout of other components in the engine compartment.

[0053] Figure 2 This is a schematic structural diagram of an intake manifold 100 according to an embodiment of the present invention from one angle. Figure 3 FIG. 1 is a schematic structural diagram of the intake manifold 100 according to another angle of an embodiment of the present invention. Figure 2 and Figure 3As shown, in a specific embodiment, the intake manifold 100 includes an intake pipe 20, an intake manifold body 10, and the intake manifold body 10 includes a first air duct 16, a second air duct 17, and an air outlet 14. The first air duct 16 is U-shaped, and the intake pipe 20 is connected to the first air duct 16 in the middle section. Here, the first air duct 16 has an air inlet 13 located in the middle thereof, and the air inlet 13 is connected to the intake pipe 20. The air flow entering from the intake pipe 20 enters the first air duct 16 and flows to both ends of the first air duct 16 respectively. The second air duct 17 is connected to the first air duct 16 downstream of the gas flow. The air outlet 14 is configured as an opening connecting the second air duct 17 to the inlet of the engine cylinder. The air flow after being diverted through the first air duct 16 enters the corresponding second air duct 17 and enters the engine cylinder through the air outlet 14. In other words, after entering the first air passage 16 from the air inlet 13, the airflow flows toward both ends of the first air passage 16, forming two airflows. The two airflows enter the corresponding second air passages 17 and enter the engine cylinders through the air outlet 14. The intake manifold body is assembled from two opposing parts, with one air outlet 14 connecting to the inlets of at least two engine cylinders.

[0054] In this embodiment, the first air passage 16 of the intake manifold body 10 is U-shaped. Due to the slender shape of the intake manifold body 10 and the fact that at least two engine cylinder inlets share a common outlet, the space occupied by the intake manifold body 10 is effectively reduced. Furthermore, the intake manifold body is assembled from two opposing parts, simplifying the manufacturing process of the intake manifold 100 and reducing manufacturing costs.

[0055] Figure 4 is a schematic diagram of the airflow of the intake manifold 100 according to an embodiment of the present invention. Figure 5 1 is a schematic structural diagram of the air outlet 14 of the intake manifold 100 according to an embodiment of the present invention, wherein: Figure 4 The direction of the arrow is the direction of air flow. Figure 4 and Figure 5 , and see Figure 2 and Figure 3 The second air channel 17 has multiple sub-air channels 171, and the airflow entering the sub-air channels 171 enters the cylinder through the air outlet 14. In other words, the airflow enters the second air channel 17 or each sub-air channel 171 of the second air channel 17 from the first air channel 16, and then enters the corresponding cylinder through the corresponding air outlet 14.

[0056] This embodiment eliminates the traditional multiple independent air passages and designs at least one integrated air passage, that is, the first air passage 16 is connected to multiple sub-air passages 171. The integrated air passage can premix the air in advance, thereby improving the uniformity of the engine cylinder intake.

[0057] In a preferred embodiment, each second air passage 17 has multiple sub-air passages 171, such as two, three, or four. This embodiment is equivalent to replacing multiple independent air passages with a smaller number of integrated air passages, namely, the second air passages 17, which can premix the air and improve the stability of the engine cylinder intake.

[0058] See also Figure 4 In some embodiments, each second air passage 17 has two sub-air passages 171. This embodiment is equivalent to integrating the two left and right air passages in the prior art, transforming the traditional four independent air passages into two integrated air passages, i.e., two second air passages 17. The two second air passages 17 can premix the air, improving the uniformity of the cylinder intake.

[0059] In some embodiments, multiple second air channels 17 are evenly arranged on both sides of the first air channel 16, and each second air channel 17 has the same number of sub-air channels 171. It can be understood that not only are the same number of second air channels 17 provided on the left and right sides of the first air channel 16, but the same number of sub-air channels 171 are also provided on the left and right sides of the first air channel 16. In other embodiments, different numbers of second air channels 17 may be provided on the left and right sides of the first air channel 16, and each second air channel 17 may also have a different number of sub-air channels 171, depending on design requirements.

[0060] In some embodiments, a second air channel 17 is provided on the left and right sides of the first air channel 16, respectively. Figure 4 In other embodiments, two second air passages 17 may be provided on the left and right sides of the first air passage 16 , respectively, depending on the design requirements.

[0061] See also Figure 3 and Figure 4 In some embodiments, the intake manifold body 10 is provided with at least one limiting structure 15 located at the outlet 14 of the second air passage 17, dividing the second air passage 17 into a plurality of sub-air passages 171. It can be understood that this embodiment utilizes the structure of the intake manifold body 10 to divide the second air passage 17, resulting in a relatively simple structure and eliminating the need for separate air passages.

[0062] In some embodiments, each limiting structure 15 can divide the second air channel 17 into two sub-air channels 171. If one limiting structure 15 is provided at the second air channel 17, the second air channel 17 is divided into two sub-air channels 171. If two limiting structures 15 are provided at the second air channel 17, the second air channel 17 is divided into three sub-air channels 171, and so on.

[0063] In some embodiments, if the intake manifold body 10 has only one second air passage 17 with two sub-air passages 171, then the intake manifold body 10 only needs to be provided with one limiting structure 15. If the intake manifold body 10 has multiple second air passages 17 with multiple sub-air passages 171, then the intake manifold body 10 needs to be provided with multiple limiting structures 15. If the intake manifold body 10 has only one second air passage 17 with three or more sub-air passages 171, then the intake manifold body 10 also needs to be provided with multiple limiting structures 15.

[0064] In some embodiments, there are multiple limiting structures 15, with one limiting structure 15 provided at each second air channel 17 to divide the corresponding second air channel 17 into two sub-air channels 171. In other embodiments, the arrangement of the limiting structures 15 can also be determined according to specific design requirements.

[0065] Figure 5 FIG. 1 is a schematic structural diagram of the air outlet 14 of the intake manifold 100 according to an embodiment of the present invention. Figure 5 As shown, and see Figure 3 In some embodiments, after the intake manifold 100 is assembled on the cylinder, the limiting structure 15 is located between the two engine cylinder inlets. Each limiting structure 15 is located in the middle of the length direction of the corresponding second air channel 17 to divide the second air channel 17 into two sub-air channels 171, and the length direction is parallel to the side of the first air channel 16. Here, the length direction of the second air channel 17 is consistent with the length direction of the outlet 14, that is, Figure 5 Center left and right direction.

[0066] In some embodiments, if multiple limiting structures 15 are provided at the second air channel 17, the limiting structures 15 do not need to be provided in the middle of the length direction of the second air channel 17. For example, if two limiting structures 15 are provided at the second air channel 17 to divide the second air channel 17 into three sub-air channels 171, then the two limiting structures 15 are respectively provided at one-third and two-thirds of the length direction of the second air channel 17, thereby equally dividing the second air channel 17 into three sub-air channels 171.

[0067] In some embodiments, the air outlet 14 is a cube, and each limiting structure 15 is located on the side of the target side of the air outlet 14 toward the middle of the air outlet 14, so as to divide the second air channel 17 and premix the air in the sub-air channels 171 of the second air channel 17. The target side extends along the length direction and is close to the first air channel 16. Figure 5 The limiting structure 15 is arranged below the upper side of the air outlet 14 , and the upper side is the side close to the first air channel 16 .

[0068] In a preferred embodiment, the limiting structure 15 is set at one-third of the width direction of the air outlet 14, which can divide the second air channel 17 and premix the air in the sub-air channels 171 of the second air channel 17. Figure 5 The up and down directions in .

[0069] In some embodiments, the four corners of the air outlet 14 are all provided with rounded chamfers, thereby improving the uniformity of air intake.

[0070] In some embodiments, each retaining structure 15 is cylindrical and has a bolt hole therein, so that a bolt can be connected to the engine through the bolt hole. In a preferred embodiment, the retaining structure 15 is cylindrical. In other embodiments, the retaining structure 15 can also be configured in other shapes, such as a plate.

[0071] In some embodiments, each retaining structure 15 is provided with a bolt hole, through which a bolt is connected to the engine. The retaining structure 15 of this embodiment not only divides the second air passage 17 and premixes the air in the sub-air passages 171 of the second air passage 17, but also connects to the engine, thereby reducing unnecessary connection structures, simplifying the structure of the intake manifold 100, and making the intake manifold 100 more compact.

[0072] Figure 6 is a schematic structural diagram of the second housing 12 according to an embodiment of the present utility model. Figure 7 FIG is a schematic structural diagram of the first housing 11 according to an embodiment of the present invention. Figure 6 and Figure 7 As shown, and see Figure 2 and Figure 3 In some embodiments, the intake manifold body 10 includes a first housing 11 and a second housing 12 that cooperate with each other. The first housing 11 and the second housing 12 are both U-shaped. The first housing 11 is provided with an air inlet 13, and the second housing 12 is provided with an air outlet 14. Here, the first housing 11 can be considered as an upper housing, and the second housing 12 can be considered as a lower housing.

[0073] See also Figure 2 and Figure 7 In some embodiments, a plurality of through holes 112 are provided on the first shell 11, and each through hole 112 corresponds to a limiting structure 15, so that the bolts pass through the through holes 112, the corresponding bolt holes of the limiting structure 15 and the engine in sequence, thereby connecting the intake manifold 100 to the engine.

[0074] In some embodiments, the first shell 11 and the second shell 12 are connected by welding, which has a simple manufacturing process and low cost.

[0075] See also Figure 7 In some embodiments, the cross section of the air inlet 13 is bilaterally symmetrical, thereby ensuring uniformity of air intake.

[0076] See also Figure 3 and Figure 5 In some embodiments, a plurality of connecting parts are provided on the first shell 11 and the second shell 12, and the connecting parts are connected to the engine. That is to say, the intake manifold 100 of this embodiment is not only connected to the engine through the limiting structure 15, but also connected to the engine through a plurality of connecting parts on the first shell 11 and the second shell 12, thereby improving the stability of the connection between the intake manifold body 10 and the engine. Here, bolt holes are provided on the connecting parts so that the bolts can be connected to the engine through the bolt holes. In a preferred embodiment, a plurality of first connecting parts 121 are provided on the second shell 12, which are arranged on the peripheral side of each air outlet 14, so as to ensure the sealing between the intake manifold body 10 and the engine, see Figure 5 .

[0077] In some embodiments, the number of the first connection parts 121 is four, wherein two first connection parts 121 are arranged on the side opposite to the air outlet 14 and the limiting structure 15, that is, Figure 5 The other two are arranged on both sides of the length direction of the air outlet 14, that is, Figure 5 The left and right sides of the intake manifold 10 are provided with the limiting structure 15, which is equivalent to having five connection points, thereby ensuring the sealing of the connection between the intake manifold body 10 and the engine. In other embodiments, the number of the first connection parts 121 can also be determined according to specific design requirements.

[0078] See also Figure 2 and Figure 7 In some embodiments, the first housing 11 is provided with at least one second connection portion 111, which is connected to the engine. In this embodiment, both the first housing 11 and the second housing 12 have a connection portion for connecting to the engine, thereby further improving the stability of the connection between the intake manifold housing 10 and the engine.

[0079] In some embodiments, there are multiple second connection parts 111, and the multiple second connection parts 111 are arranged at intervals in the middle of the first shell 11, while the first connection part 121 is arranged at the air outlet 14, which is equivalent to the two sides of the intake manifold body 10. The connection points are relatively uniform, thereby improving the stability of the connection between the intake manifold body 10 and the engine.

[0080] Figure 8 is a schematic top view of an intake manifold 100 according to an embodiment of the present invention. Figure 9 yes Figure 8Schematic cross-sectional view along AA. Figures 8 and 9 As shown, and see Figure 2 In some embodiments, the air intake pipe 20 is arranged at an angle relative to the first housing 11. Here, the air intake pipe 20, the first housing 11, and the second housing 12 are all connected by welding. The angle of inclination between the air intake pipe 20 and the first housing 11 is determined according to specific design requirements.

[0081] In this embodiment, air enters from the middle of the intake manifold body 10 and is divided to the left and right sides, changing from thin to thick with a smooth arc transition, which helps to improve the uniformity of intake.

[0082] Figure 10 FIG is a schematic cross-sectional view of an air intake pipe 20 according to an embodiment of the present invention. Figure 10 As shown, in some embodiments, a first rounded chamfer 21 is provided at the connection between the intake pipe 20 and the first housing 11. The radius of the first rounded chamfer 21 on the side where the intake pipe 20 forms an acute angle with the first housing 11 is smaller than the radius of the first rounded chamfer 21 on the other side. It can be understood that the radius of the first rounded chamfer 21 on the curved side of the intake pipe 20 is smaller than the radius of the other first rounded chamfer 21.

[0083] This embodiment adjusts the intake uniformity by the size of the first round chamfer 21 at the connection corner between the intake pipe 20 and the first housing 11, avoiding the influence of the inclination angle of the intake pipe 20, resulting in small intake resistance on the left and large intake resistance on the right.

[0084] In some embodiments, the distances from the air intake port 13 to the corresponding cylinder inlets on both sides are equal.

[0085] See also Figure 10 In a preferred embodiment, the radius of the first round chamfer 21 on the left side is the reference R, and the radius of the first round chamfer 21 on the right side is 1.5-2.5R.

[0086] See also Figure 6 and Figure 7 A second round chamfer 122 is provided at the corners of the first shell 11 and the second shell 12 , and the radii of the second round chamfer 122 at the corners of the first shell 11 and / or the second shell 12 are different.

[0087] This embodiment utilizes variable second round chamfers 122 at the corners to control the size of the air intake cross-section, thereby achieving uniform air intake. In a preferred embodiment, only the second round chamfers 122 need be provided at the corners of the second shell 12. The first shell 11 utilizes uniform round chamfers, thus avoiding the uneven weld parting surface of the first shell 11, which could affect the weld with the second shell 12.

[0088] by Figure 10The radius of the first round chamfer 21 on the left side is the reference R, see Figure 6 , Figure 6 The radius of the second rounded chamfer 122 at the top is R, the radius of the second rounded chamfer 122 to the left of the top second rounded chamfer 122 is 2.5-3.5R, and the radius of the second rounded chamfer 122 at the leftmost side is 1.5-2R. In other embodiments, the radius of the second rounded chamfer 122 at each corner of the second housing 12 can also be set according to specific design requirements.

[0089] by Figure 10 The radius of the first round chamfer 21 on the left side is the reference R, see Figure 7 , Figure 7 The radius of the second round chamfer 122 on the rightmost side is 1-1.5 R, and the radius of the second round chamfer 122 on the side is 1.5-2.5 R. In other embodiments, the radius of the second round chamfer 122 at each corner of the first housing 11 can also be set according to specific design requirements.

[0090] Figure 11 is a schematic bottom view of an intake manifold 100 according to an embodiment of the present invention. Figure 12 yes Figure 11 Schematic cross-sectional view along BB, Figure 13 yes Figure 11 Schematic cross-sectional view along CC, wherein Figure 12 and Figure 13 The arrow in the middle indicates the direction of airflow. Figure 11 and Figure 12 As shown, in some embodiments, a guide structure 113 is provided at the position of the first housing 11 defining the second air channel 17 so that the airflow evenly enters the multiple sub-air channels 171. Here, the design of the guide structure 113 is specifically designed according to the spatial boundary limitations of the first housing 11.

[0091] In the case of a normal rectangular equal cross section, Figure 11 The left side of the two second air passages 17 in the middle and upper parts has more air intake and smaller pressure drop. Figure 12 and Figure 13 The cross-sectional flow guide structure 113 is designed to allow air to first enter the right air passages of the upper and lower second air passages 17, so as to achieve a uniform air intake effect.

[0092] The present invention further provides an engine, which includes the intake manifold 100 in any one of the above embodiments. The intake manifold 100 will not be described in detail here.

[0093] At this point, those skilled in the art should recognize that, although multiple exemplary embodiments of the present invention have been shown and described in detail herein, many other variations or modifications consistent with the principles of the present invention can be directly determined or deduced from the contents disclosed herein without departing from the spirit and scope of the present invention. Therefore, the scope of the present invention should be understood and deemed to cover all such other variations or modifications.

Claims

1. An intake manifold, comprising an intake pipe and an intake manifold body, wherein the intake manifold body comprises: a first air passage, wherein the first air passage is U-shaped, and the air inlet pipe is connected to the first air passage at a middle section thereof; a second air passage, the second air passage being connected to the first air passage downstream in the gas flow direction; and an air outlet, the air outlet being configured as an opening connecting the second air passage and an engine cylinder inlet; It is characterized in that The intake manifold body is assembled from two upper and lower opposite parts; One of the air outlets is connected to at least two engine cylinder inlets.

2. The intake manifold according to claim 1, characterized in that: The second air channel has a plurality of sub-air channels, and the airflow entering the sub-air channels enters the cylinder through the air outlet.

3. The intake manifold according to claim 2, characterized in that: The intake manifold body is provided with at least one limiting structure, and the limiting structure is located at the air outlet of the second air channel, dividing the second air channel into a plurality of sub-air channels.

4. The intake manifold according to claim 3, characterized in that After the intake manifold is assembled on the cylinder, the limiting structure is located between the inlets of two engine cylinders.

5. The intake manifold according to claim 4, characterized in that: Each of the limiting structures is columnar, Each of the limiting structures is provided with a bolt hole, so that a bolt can be connected to the engine through the bolt hole.

6. The intake manifold according to claim 5, characterized in that: The intake manifold body includes a first shell and a second shell that cooperate with each other. The first shell and the second shell are both U-shaped. The first shell is provided with an air inlet, and the second shell is provided with the air outlet.

7. The intake manifold according to claim 6, characterized in that A plurality of connecting parts are provided on the first shell and the second shell, and the connecting parts are connected to the engine.

8. The intake manifold according to claim 7, characterized in that: The second shell is provided with a plurality of first connection parts, which are arranged around the periphery of each of the air outlets.

9. The intake manifold according to claim 8, characterized in that: The air intake pipe is arranged obliquely relative to the first housing.

10. The intake manifold according to claim 9, characterized in that A first round chamfer is provided at a connection between the air intake pipe and the first housing. The radius of the first round chamfer on the side where the air intake pipe and the first housing form an acute angle is smaller than the radius of the first round chamfer on the other side.

11. The intake manifold according to claim 10, characterized in that The distances from the air inlet to the corresponding cylinder inlets on both sides are equal.

12. The intake manifold according to claim 10, characterized in that A flow guiding structure is provided at a position of the first shell defining and forming the second air channel, so that the air flow enters the plurality of sub-air channels evenly.

13. An engine, characterized in that: Comprising the intake manifold according to any one of claims 1-12.

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