Exhaust manifold of engine and vehicle

Abstract

The utility model discloses an exhaust manifold and a vehicle, and the exhaust manifold comprises an exhaust main pipe which is provided with an exhaust port, and the exhaust port is used for being communicated with a supercharger; the multiple exhaust side pipes are arranged on the exhaust main pipe, and the multiple exhaust side pipes are arranged on the two opposite sides of the exhaust main pipe correspondingly; at least part of the inner wall, close to the exhaust main pipe, of at least part of the exhaust side pipe is constructed to be a flow guide face, and the flow guide face extends towards the exhaust port. The flow guide faces are arranged on at least part of the exhaust side pipes, waste gas is guided to the exhaust port through the flow guide faces, the problem that waste gas flows from the exhaust side pipe on one side to the exhaust side pipe on the other side due to inertia in the prior art is solved, the flow coefficient is increased, the flow capacity is enhanced, gas is smooth, and the service life of the exhaust pipe is prolonged. The exhaust energy loss caused by the exhaust manifold is reduced, the exhaust energy utilization rate of the supercharger is increased, and the transient response of the supercharger is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of automobiles, in particular to an exhaust manifold of an engine and a vehicle. Background Art

[0002] In related technologies, an exhaust manifold is an important component of an engine exhaust system. The exhaust manifold is provided with a plurality of intake pipes, and the exhaust port of the exhaust manifold is communicated with a supercharger. The exhaust gas discharged from the engine passes through the intake pipes to the supercharger. However, during the process of the exhaust gas flowing from the first intake pipe to the exhaust port, the exhaust gas may flow into the second intake pipe, resulting in loss of exhaust energy. Content of the Utility Model

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. For this purpose, the utility model provides an exhaust manifold of an engine, which reduces the loss of exhaust energy caused by the exhaust manifold.

[0004] The exhaust manifold of an engine according to an embodiment of the utility model includes: an exhaust main pipe having an exhaust port for communicating with a supercharger; a plurality of exhaust side pipes provided on the exhaust main pipe, and the plurality of exhaust side pipes are respectively provided on opposite sides of the exhaust main pipe; wherein at least a part of the exhaust side pipes near the inner wall of the exhaust main pipe is at least partially configured as a guiding surface extending in the direction of the exhaust port.

[0005] The exhaust manifold of an engine according to an embodiment of the utility model, by providing a guiding surface on at least a part of the exhaust side pipes, uses the guiding surface to guide the flow of the exhaust gas, guides the exhaust gas to the exhaust port, improves the problem in related technologies that the exhaust gas flows from one exhaust side pipe to the other exhaust side pipe due to inertia, improves the flow coefficient, enhances the flow capacity, makes the gas flow smoothly, reduces the loss of exhaust energy caused by the exhaust manifold, improves the utilization rate of exhaust energy by the supercharger, and improves the transient response of the supercharger.

[0006] In some embodiments, a first confluence part is provided between the plurality of exhaust side pipes, and the guiding surface extends to connect the first confluence part.

[0007] In some embodiments, the plurality of exhaust side pipes include a first exhaust side pipe and a second exhaust side pipe. A second confluence part is provided between the first exhaust side pipe and the exhaust main pipe, and a third confluence part is provided between the second exhaust side pipe and the exhaust main pipe. The first confluence part is respectively connected to the second confluence part and the third confluence part. The guiding surface extends to connect the second confluence part, and / or the guiding surface extends to connect the third confluence part.

[0008] In some embodiments, the first confluence portion, the second confluence portion, the third confluence portion, a partial inner wall of the exhaust main pipe, an inner wall of the first exhaust side pipe, and an inner wall of the second exhaust side pipe together define a confluence cavity, and the confluence cavity communicates with the exhaust port.

[0009] In some embodiments, the volume of the confluence cavity is V1, and the total volume of the exhaust manifold is V2, where 0.2 ≤ V1 / V2 ≤ 0.25.

[0010] In some embodiments, on the central axis of the first exhaust side pipe, the maximum distance from the midpoint between the first exhaust side pipe and the exhaust port is L1, and the maximum distance from the confluence cavity to the midpoint is L2, where 1 / 7 ≤ L2 / L1 ≤ 1 / 5; and / or, on the central axis of the second exhaust side pipe, the maximum distance from the midpoint between the second exhaust side pipe and the exhaust port is L3, and the maximum distance from the confluence cavity to the midpoint is L4, where 1 / 7 ≤ L4 / L3 ≤ 1 / 5.

[0011] In some embodiments, the exhaust main pipe includes: an exhaust portion, an opening of the exhaust portion is configured as the exhaust port, and one end of the exhaust port away from the exhaust port communicates with the confluence cavity.

[0012] In some embodiments, the exhaust main pipe includes: a first pipe provided with a first air inlet; a first arc-shaped pipe, one end of the first arc-shaped pipe is connected to the first pipe; a second pipe, the exhaust port is provided on the second pipe, and the second pipe is connected to the other end of the first arc-shaped pipe.

[0013] In some embodiments, the exhaust side pipe includes: a third pipe provided with a second air inlet; a second arc-shaped pipe, one end of the second arc-shaped pipe is connected to the third pipe; a fourth pipe, a plurality of communication ports are provided on the second pipe, the plurality of communication ports respectively communicate with the fourth pipe, and the fourth pipe is connected to the other end of the second arc-shaped pipe; wherein, at least part of the communication ports are provided on the side surface of the second pipe facing the first pipe.

[0014] A vehicle according to an embodiment of the present invention includes the above-mentioned exhaust manifold.

[0015] In the vehicle according to the embodiment of the present invention, by providing a flow guiding surface on at least part of the exhaust side pipe, guiding the flow of the exhaust gas by the flow guiding surface, guiding the exhaust gas to the exhaust port, improving the problem that in the related art, the exhaust gas flows from one exhaust side pipe to the other exhaust side pipe due to inertia, increasing the flow coefficient, enhancing the flow capacity, making the gas flow smoothly, reducing the loss of exhaust energy caused by the exhaust manifold, improving the utilization rate of exhaust energy by the supercharger, and improving the transient response of the supercharger.

[0016] Additional aspects and advantages of the present utility model will be given in part in the following description, become apparent in part from the following description, or be learned through the practice of the present utility model. Description of the Drawings

[0017] The above and / or additional aspects and advantages of the present utility model will become apparent and be readily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0018] Figure 1 Schematic diagram of the flow guiding surface in the embodiment of the present utility model;

[0019] Figure 2 Schematic diagram of the first junction, the second junction and the third junction in the embodiment of the present utility model;

[0020] Figure 3 Schematic diagram of the confluence chamber in the embodiment of the present utility model;

[0021] Figure 4 Schematic diagram of L1, L2, L3, L4 in the embodiment of the present utility model;

[0022] Figure 5 Schematic diagram of the exhaust part in the embodiment of the present utility model;

[0023] Figure 6 Schematic diagram of the specific structure of the exhaust main pipe and the exhaust side pipe in the embodiment of the present utility model;

[0024] Figure 7 Flow diagram of the waste gas in the exhaust side pipe in the embodiment of the present utility model.

[0025] Reference Signs:

[0026] 100, exhaust manifold;

[0027] 10, exhaust main pipe; 11, exhaust port; 12, confluence chamber; 13, exhaust part; 14, first pipe; 141, first air inlet; 15, first arc-shaped pipe; 16, second pipe;

[0028] 20, exhaust side pipe; 21, flow guiding surface; 22, first junction; 23, first exhaust side pipe; 24, second exhaust side pipe; 25, second junction; 26, third junction; 27, third pipe; 271, second air inlet; 28, second arc-shaped pipe; 29, fourth pipe. Detailed Embodiments

[0029] Embodiments of the present utility model will be described in detail below. Examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the accompanying drawings are exemplary and are only used to explain the present utility model and should not be construed as a limitation to the present utility model.

[0030] In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present utility model. In addition, features defined as "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, unless otherwise specified, the meaning of "a plurality" is two or more.

[0031] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and defined, the terms "mounted", "connected" and "coupled" shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0032] Unless otherwise specified, the front-rear direction in this application is the longitudinal direction of the vehicle, i.e., the X direction; the left-right direction is the lateral direction of the vehicle, i.e., the Y direction; and the up-down direction is the vertical direction of the vehicle, i.e., the Z direction.

[0033] Next, refer to Figures 1-6 to describe the exhaust manifold 100 of the engine according to an embodiment of the present utility model.

[0034] Refer to Figure 1 , the exhaust manifold 100 according to an embodiment of the present utility model includes: an exhaust main pipe 10 and a plurality of exhaust side pipes 20.

[0035] The exhaust main pipe 10 has an exhaust port 11, and the exhaust port 11 is used to communicate with the supercharger. The exhaust side pipes 20 are arranged on the exhaust main pipe 10, and a plurality of exhaust side pipes 20 are respectively arranged on opposite sides of the exhaust main pipe 10. Among them, at least part of the inner wall of at least part of the exhaust side pipe 20 close to the exhaust main pipe 10 is configured as a flow guiding surface 21, and the flow guiding surface 21 extends in the direction towards the exhaust port 11.

[0036] Among them, the exhaust main pipe 10 communicates with the engine cylinders, the exhaust gas of the engine cylinders is discharged into the exhaust main pipe 10, and the exhaust main pipe 10 discharges the exhaust gas to the supercharger through the exhaust port 11. The supercharger is also called a turbocharger, and the supercharger is used to increase the intake pressure of the engine. The supercharger uses the energy of the exhaust gas discharged from the engine to drive the turbine, thereby driving the compressor to press more air into the engine cylinders. This process can increase the intake air volume of the engine, thereby improving the combustion efficiency and increasing the output power of the engine.

[0037] The exhaust side pipes 20 communicate with the engine cylinders, the exhaust gas of the engine cylinders is discharged into the exhaust side pipes 20, a plurality of exhaust side pipes 20 are all arranged on the exhaust main pipe 10, and the plurality of exhaust side pipes 20 discharge the exhaust gas to the supercharger through the exhaust port 11.

[0038] In the related art, the exhaust manifold is an important part of the engine exhaust system. The exhaust manifold is provided with a plurality of intake pipes, and the exhaust port of the exhaust manifold communicates with the supercharger. The exhaust gas discharged from the engine passes through the intake pipes to the supercharger. However, during the process of the exhaust gas flowing from the first intake pipe to the exhaust port, the exhaust gas may flow into the second intake pipe, resulting in the loss of exhaust energy.

[0039] In the embodiment of the present invention, by providing the flow guiding surface 21, the flow guiding surface 21 is located on the inner wall of the exhaust side pipe 20 close to the exhaust main pipe 10, and the flow guiding surface 21 plays a role in guiding the flow. The flow guiding surface 21 guides the flow of the exhaust gas. The flow guiding surface 21 extends in the direction towards the exhaust port 11. The flow guiding surface 21 will guide the exhaust gas to flow towards the exhaust port 11, improving the problem in the related art that the exhaust gas flows from one exhaust side pipe to the other exhaust side pipe due to inertia, increasing the flow coefficient, enhancing the flow capacity, making the gas flow smoothly, reducing the loss of exhaust energy caused by the exhaust manifold 100, improving the utilization rate of exhaust energy by the supercharger, and improving the transient response of the supercharger.

[0040] Refer to Figure 7 , S1 represents the flow direction of the exhaust gas in the first exhaust side pipe 20, S2 represents the flow direction of the exhaust gas in the second exhaust side pipe 20, B represents the exhaust port 11, and the flow guiding surface 21 guides the flow of the exhaust gas. It can be seen that the arrow points to the exhaust port 11, and the flow guiding surface 21 guides the exhaust gas to flow towards the exhaust port 11.

[0041] Specifically, there are multiple exhaust side pipes 20, and the multiple exhaust side pipes 20 are respectively arranged on opposite sides of the exhaust main pipe 10. For example, there are two exhaust side pipes 20, and the two exhaust side pipes 20 are respectively arranged on the left and right sides of the exhaust main pipe 10. Among them, at least part of the inner wall of at least some of the exhaust side pipes 20 is configured as a flow guiding surface 21. That is to say, one of the multiple exhaust side pipes 20 may be provided with a flow guiding surface 21, or all of the exhaust side pipes 20 may be provided with a flow guiding surface 21.

[0042] It should be noted that at least part of the inner wall of the exhaust side pipe 20 is configured as a flow guiding surface 21. The inner wall may be partially configured as a flow guiding surface 21, or the entire inner wall may be configured as a flow guiding surface 21.

[0043] It can be understood that in the solution where some of the multiple exhaust side pipes 20 are provided with a flow guiding surface 21, the flow guiding surface 21 also plays a role in guiding the flow. When the exhaust side pipe 20 provided with the flow guiding surface 21 intakes air, it can improve the problem that in the related art, the exhaust gas flows from one exhaust side pipe to the other exhaust side pipe due to inertia; in the solution where all of the exhaust side pipes 20 are provided with a flow guiding surface 21, the flow guiding surface 21 plays a role in guiding the flow. When any one of the exhaust side pipes 20 intakes air, it can improve the problem that in the related art, the exhaust gas flows from one exhaust side pipe to the other exhaust side pipe due to inertia.

[0044] For the exhaust manifold 100 of the engine according to the embodiment of the present invention, by providing a flow guiding surface 21 on at least some of the exhaust side pipes 20 and using the flow guiding surface 21 to guide the flow of the exhaust gas, the exhaust gas is guided to the exhaust port 11, improving the problem that in the related art, the exhaust gas flows from one exhaust side pipe to the other exhaust side pipe due to inertia, increasing the flow coefficient, enhancing the flow capacity, making the gas flow smoothly, reducing the loss of exhaust energy caused by the exhaust manifold 100, improving the utilization rate of exhaust energy by the supercharger, and improving the transient response of the supercharger.

[0045] Refer to Figure 1 , in some embodiments, a first junction portion 22 is provided between the multiple exhaust side pipes 20, and the flow guiding surface 21 extends to connect the first junction portion 22.

[0046] Among them, the first junction portion 22 is the part where the multiple exhaust side pipes 20 meet, the spaces in the multiple exhaust side pipes 20 meet at the first junction portion 22, and the flow guiding surface 21 is adjacent to the first junction portion 22.

[0047] In the above solution, by providing the flow guiding surface 21 to connect the first junction portion 22, the flow guiding surface 21 gives full play to the guiding effect, guiding more exhaust gas to the exhaust port 11, preventing the exhaust gas from flowing into the other exhaust side pipe 20, further improving the problem that in the related art, the exhaust gas flows from one exhaust side pipe to the other exhaust side pipe due to inertia, and increasing the flow coefficient.

[0048] Specifically, the first confluence portion 22 is a confluence surface, and the confluence surface is a portion where the inner walls of a plurality of exhaust side pipes 20 meet.

[0049] Refer to Figure 2 , in some embodiments, the plurality of exhaust side pipes 20 includes a first exhaust side pipe 23 and a second exhaust side pipe 24. A second confluence portion 25 is provided between the first exhaust side pipe 23 and the exhaust main pipe 10, and a third confluence portion 26 is provided between the second exhaust side pipe 24 and the exhaust main pipe 10. The first confluence portion 22 is respectively connected to the second confluence portion 25 and the third confluence portion 26. The flow guiding surface 21 extends to connect to the second confluence portion 25, and / or the flow guiding surface 21 extends to connect to the third confluence portion 26.

[0050] Among them, the second confluence portion 25 is a portion where the first exhaust side pipe 23 and the exhaust main pipe 10 meet, and the third confluence portion 26 is a portion where the second exhaust side pipe 24 and the exhaust main pipe 10 meet. When the flow guiding surface 21 is provided on the first exhaust side pipe 23, the flow guiding surface 21 is adjacent to the second confluence portion 25. When the flow guiding surface 21 is provided on the second exhaust side pipe 24, the flow guiding surface 21 is adjacent to the third confluence portion 26.

[0051] In the above solution, by providing the flow guiding surface 21 to connect to the second confluence portion 25, the flow guiding surface 21 fully exerts the flow guiding effect, guiding more exhaust gas to the exhaust port 11, preventing the exhaust gas from flowing into the second exhaust side pipe 24, further improving the problem in the related art that the exhaust gas flows from one exhaust side pipe to the other exhaust side pipe due to inertia, and improving the flow coefficient. Or, the flow guiding surface 21 is connected to the third confluence portion 26, the flow guiding surface 21 fully exerts the flow guiding effect, guiding more exhaust gas to the exhaust port 11, preventing the exhaust gas from flowing into the first exhaust side pipe 23, further improving the problem in the related art that the exhaust gas flows from one exhaust side pipe to the other exhaust side pipe due to inertia, and improving the flow coefficient.

[0052] Specifically, the second confluence portion 25 is a confluence surface, and the confluence surface is a portion where the inner walls of the first exhaust side pipe 23 and the exhaust main pipe 10 meet. The third confluence portion 26 is a confluence surface, and the confluence surface is a portion where the inner walls of the second exhaust side pipe 24 and the exhaust main pipe 10 meet.

[0053] In some embodiments, the flow guiding surface 21 is provided on one of the first exhaust side pipe 23 and the second exhaust side pipe 24. In other embodiments, the flow guiding surface 21 is provided on both the first exhaust side pipe 23 and the second exhaust side pipe 24.

[0054] Refer to Figures 1-3, in some embodiments, the first junction portion 22, the second junction portion 25, the third junction portion 26, a partial inner wall of the exhaust main pipe 10, an inner wall of the first exhaust side pipe 23, and an inner wall of the second exhaust side pipe 24 together define a confluence chamber 12, and the confluence chamber 12 communicates with the exhaust port 11.

[0055] Wherein, the confluence chamber 12 is the position where the exhaust main pipe 10, the first exhaust side pipe 23, and the second exhaust side pipe 24 converge. The inner spaces of the exhaust main pipe 10, the first exhaust side pipe 23, and the second exhaust side pipe 24 jointly intersect at the confluence chamber 12. The confluence chamber 12 communicates with the exhaust port 11 to uniformly guide the exhaust gas to the exhaust port 11.

[0056] Referring to Figure 7 , A represents the part where the first exhaust side pipe 23 contacts the confluence chamber 12, D represents the part where the second exhaust side pipe 24 contacts the confluence chamber 12, E represents the dividing line between the upper and lower segments of the confluence chamber 12. Among them, a, b, and c are all points on S1, and d, e, and f are all points on S2. The ab segment is tangent to the end of the first exhaust side pipe 23, the ed segment is tangent to the end of the second exhaust side pipe 24, the bc segment is tangent to the ab segment, the bc segment is perpendicular to the exhaust port 11, the ef segment is tangent to the de segment, and the ef segment is perpendicular to the exhaust port 11. It can be seen that the exhaust gas flows smoothly from the first exhaust side pipe 23 and the second exhaust side pipe 24, and more exhaust gas is discharged.

[0057] In the above solution, by making the exhaust main pipe 10, the first exhaust side pipe 23, and the second exhaust side pipe 24 jointly intersect at the confluence chamber 12, the structure of the entire exhaust manifold 100 is made compact by using the confluence chamber 12, and the existing space is fully utilized.

[0058] In some embodiments, the volume of the confluence chamber 12 is V1, and the total volume of the exhaust manifold 100 is V2, and 0.2 ≤ V1 / V2 ≤ 0.25.

[0059] Among them, the volume of the confluence chamber 12 accounts for 0.2 to 0.25 of the total volume of the exhaust manifold 100, so that the proportion of the confluence chamber 12 is relatively small. It should be noted that the confluence chamber 12 is a cavity jointly communicated by the exhaust main pipe 10 and the exhaust side pipe 20, with spatial communication. The total volume of the exhaust manifold 100 includes the volume of the exhaust main pipe 10 plus the volumes of multiple exhaust side pipes 20 plus the volume of the confluence chamber 12.

[0060] In the above solution, by setting the volume of the confluence chamber 12 to account for 0.2 to 0.25 of the total volume of the exhaust manifold 100, the exhaust gas is mostly in the exhaust side pipe 20 or the exhaust main pipe 10 for most of the time, and the time passing through the confluence chamber 12 is short, reducing the occurrence of exhaust interference and gas turbulence, and thus improving the flow coefficient.

[0061] Specifically, V1 / V2 is 0.2; alternatively, V1 / V2 is 0.21; alternatively, V1 / V2 is 0.22; alternatively, V1 / V2 is 0.23; alternatively, V1 / V2 is 0.24; alternatively, V1 / V2 is 0.25.

[0062] For example, the total volume V2 of the exhaust manifold 100 is 757 mL, and the volume V1 of the confluence chamber 12 is 203 mL. The confluence chamber 12 accounts for approximately 1 / 4 of the total volume.

[0063] In some specific embodiments, the exhaust main pipe 10, the first exhaust side pipe 23, and the second exhaust side pipe 24 around the confluence chamber 12 are arranged in a triangular space, making the overall structure of the exhaust manifold 100 more compact and facilitating the setting of the flow guiding surface 21. At the same time, based on the triangular space arrangement of the confluence chamber 12, when drawing the confluence chamber 12, the circular sketch of the outlet of the exhaust manifold 100 is regarded as a pizza and cut into three pieces similar to pizza slices. The area ratio of each piece is adjusted according to the coefficients of the exhaust main pipe 10, each exhaust side pipe 20, and the required flow guiding structure, and then a blend command is performed with the end of the branch pipe. This design makes the flow guiding structures of cylinders 2 and 6 larger and more effective.

[0064] Refer to Figures 1-4 , in some embodiments, on the central axis of the first exhaust side pipe 23, the maximum distance from the midpoint of the first exhaust side pipe 23 to the exhaust port 11 is L1, and the maximum distance from the confluence chamber 12 to the midpoint is L2, and 1 / 7 ≤ L2 / L1 ≤ 1 / 5.

[0065] Wherein, the central axis of the first exhaust side pipe 23 is a virtual line. With the central axis as a reference, the maximum distance from the midpoint of the first exhaust side pipe 23 to the exhaust port 11 is L1, that is, the maximum distance between the projection of the first exhaust side pipe 23 on the above central axis and the projection of the midpoint on the central axis is L1, and the distance between the projection of the confluence chamber 12 on the above central axis and the projection of the midpoint on the central axis is L2.

[0066] In the above solution, by setting the ratio of L1 to L2 within the range of 1 / 7 to 1 / 5, it is convenient to form the flow guiding surface 21, improve the problem of gas leakage, and at the same time improve the turbulent flow situation, thereby improving the utilization rate of exhaust gas.

[0067] For example, the maximum distance L1 from the midpoint of the first exhaust side pipe 23 to the exhaust port 11 is 245 mm, and the maximum distance L2 from the confluence chamber 12 to the midpoint is 60 mm, accounting for approximately 1 / 6 of the total length.

[0068] Refer to Figures 1-4, in some embodiments, on the central axis of the second exhaust side pipe 24, the maximum distance between the midpoint of the second exhaust side pipe 24 and the exhaust port 11 is L3, and the maximum distance between the confluence chamber 12 and the midpoint is L4, where 1 / 7 ≤ L4 / L3 ≤ 1 / 5.

[0069] Among them, the central axis of the second exhaust side pipe 24 is a virtual line. With the central axis as a reference, the maximum distance between the midpoint of the second exhaust side pipe 24 and the exhaust port 11 is L3, the maximum distance between the projection of the second exhaust side pipe 24 on the above central axis and the projection of the midpoint on the central axis is L3, and the distance between the projection of the confluence chamber 12 on the above central axis and the projection of the midpoint on the central axis is L4.

[0070] In the above solution, by setting the ratio of L3 to L4 in the range of 1 / 7 to 1 / 5, it is convenient to form the flow guiding surface 21, improve the problem of gas leakage, and at the same time improve the turbulent flow situation, thereby improving the utilization rate of exhaust gas.

[0071] For example, the maximum distance L3 between the midpoint of the second exhaust side pipe 24 and the exhaust port 11 is 245 mm, and the maximum distance L4 between the confluence chamber 12 and the midpoint is 60 mm, accounting for about 1 / 6 of the total length.

[0072] Refer to Figures 1-4 , in some embodiments, on the central axis of the first exhaust side pipe 23, the maximum distance between the midpoint of the first exhaust side pipe 23 and the exhaust port 11 is L1, and the maximum distance between the confluence chamber 12 and the midpoint is L2, where 1 / 7 ≤ L2 / L1 ≤ 1 / 5. On the central axis of the second exhaust side pipe 24, the maximum distance between the midpoint of the second exhaust side pipe 24 and the exhaust port 11 is L3, and the maximum distance between the confluence chamber 12 and the midpoint is L4, where 1 / 7 ≤ L4 / L3 ≤ 1 / 5.

[0073] Among them, the central axis of the first exhaust side pipe 23 is a virtual line. With the central axis as a reference, the maximum distance between the midpoint of the first exhaust side pipe 23 and the exhaust port 11 is L1, the maximum distance between the projection of the first exhaust side pipe 23 on the above central axis and the projection of the midpoint on the central axis is L1, the distance between the projection of the confluence chamber 12 on the above central axis and the projection of the midpoint on the central axis is L2. The central axis of the second exhaust side pipe 24 is a virtual line. With the central axis as a reference, the maximum distance between the midpoint of the second exhaust side pipe 24 and the exhaust port 11 is L3, the maximum distance between the projection of the second exhaust side pipe 24 on the above central axis and the projection of the midpoint on the central axis is L3, and the distance between the projection of the confluence chamber 12 on the above central axis and the projection of the midpoint on the central axis is L4.

[0074] In the above solution, by setting the ratio of L1 to L2 within the range of 1 / 7 to 1 / 5, and by setting the ratio of L3 to L4 within the range of 1 / 7 to 1 / 5, it is convenient to form the flow guiding surface 21, improve the gas leakage problem, and at the same time improve the turbulent flow situation, thereby improving the utilization rate of the exhaust gas.

[0075] For example, the maximum distance L1 from the midpoint of the first exhaust side pipe 23 to the exhaust port 11 is 245 mm, and the maximum distance L2 from the confluence chamber 12 to the midpoint is 60 mm, accounting for about 1 / 6 of the total length. The maximum distance L3 from the midpoint of the second exhaust side pipe 24 to the exhaust port 11 is 245 mm, and the maximum distance L4 from the confluence chamber 12 to the midpoint is 60 mm, accounting for about 1 / 6 of the total length.

[0076] Refer to Figure 1 、 Figure 3 and Figure 5 In some embodiments, the exhaust main pipe 10 includes: an exhaust portion 13. The opening of the exhaust portion 13 is configured as the exhaust port 11, and one end of the exhaust port 11 away from the exhaust port 11 communicates with the confluence chamber 12.

[0077] Wherein, one end of the exhaust portion 13 is an opening, the opening is the exhaust port 11, the confluence chamber 12 communicates with the exhaust portion 13, and the exhaust portion 13 uniformly discharges the exhaust gas in the confluence chamber 12.

[0078] In the above solution, by providing the exhaust portion 13 communicating with the confluence chamber 12, the flow of the exhaust gas is guided by the exhaust portion 13. The exhaust portion 13 is installed on the supercharger, which facilitates installation and simplifies the assembly steps.

[0079] In some specific embodiments, the first exhaust side pipe 23 and the second exhaust side pipe 24 have the same length, reducing the exhaust resistance and improving the charging efficiency.

[0080] Refer to Figure 5 、 Figure 6 In some embodiments, the exhaust main pipe 10 includes: a first pipe 14, a first arc-shaped pipe 15 and a second pipe 16.

[0081] The first pipe 14 is provided with a first air inlet 141. One end of the first arc-shaped pipe 15 is connected to the first pipe 14. The exhaust port 11 is provided on the second pipe 16, and the second pipe 16 is connected to the other end of the first arc-shaped pipe 15.

[0082] Wherein, the first air inlet 141 of the first pipe 14 communicates with the engine cylinder, and the engine cylinder discharges the exhaust gas into the first pipe 14 through the first air inlet 141. One end of the first arc-shaped pipe 15 is connected to the first pipe 14, and the other end of the first arc-shaped pipe 15 is connected to the second pipe 16.

[0083] In the above solution, by arranging the first arc-shaped pipe 15 to be connected to the first pipe 14 and the second pipe 16 respectively, the exhaust manifold 100 is fully adapted to the layout of the engine and the supercharger with an inclined arrangement, improving the adaptability and compacting the structure.

[0084] Specifically, an exhaust portion 13 is provided on the second pipe 16, and the exhaust portion 13 is a partial structure of the second pipe 16.

[0085] Referring to Figure 5 、 Figure 6 , in some embodiments, the exhaust side pipe 20 includes: a third pipe 27, a second arc-shaped pipe 28 and a fourth pipe 29.

[0086] The third pipe 27 is provided with a second air inlet 271. One end of the second arc-shaped pipe 28 is connected to the third pipe 27. A plurality of communication ports are provided on the second pipe 16, and the plurality of communication ports are respectively communicated with the fourth pipe 29, and the fourth pipe 29 is connected to the other end of the second arc-shaped pipe 28. Among them, at least part of the communication ports are provided on the side surface of the second pipe 16 facing the first pipe 14.

[0087] Among them, the second air inlet 271 of the third pipe 27 is communicated with the engine cylinder, and the engine cylinder discharges the exhaust gas into the third pipe 27 through the second air inlet 271. One end of the second arc-shaped pipe 28 is connected to the first pipe 14, and the other end of the second arc-shaped pipe 28 is connected to the fourth pipe 29.

[0088] In the above solution, by arranging the second arc-shaped pipe 28 to be connected to the third pipe 27 and the fourth pipe 29 respectively, the exhaust manifold 100 is further adapted to the layout of the engine and the supercharger with an inclined arrangement, improving the adaptability and compacting the structure. Moreover, at least part of the plurality of communication ports on the second pipe 16 are provided on the side surface of the second pipe 16, at least part of the communication ports face the first pipe 14, the second pipe 16 and the fourth pipe 29 face the same direction, improving the consistency and increasing the communication area.

[0089] In some specific embodiments, the above engine is a V6 engine.

[0090] The vehicle according to the embodiment of the present invention includes the above exhaust manifold 100.

[0091] Specifically, the average flow coefficient of the above exhaust manifold 100 reaches a relatively high level, the difference in the flow coefficients of each cylinder is reduced to 3.42%, and the exhaust resistance along the way is reduced to the lowest, greatly improving the charging efficiency to meet the high-performance requirements of the engine.

[0092] In the related art, improving the thermal efficiency of the engine and enhancing the combustion efficiency have become important measures for each manufacturer to cope with the increasingly strict regulations. On the other hand, the requirements of drivers for vehicle performance are also constantly increasing: high torque at low speeds, good transient response, and gradually increasing requirements for specific power. To meet the national emission and fuel consumption regulations and customer performance requirements, a large number of combustion matches and optimizations are carried out on the combustion system during the engine design process. A good exhaust system design is of great significance for the improvement and enhancement of the combustion system. The exhaust manifold is an important part of the engine exhaust system, and its design directly affects the power performance and economy of the engine. During the design process, the consistency of the exhaust manifold flow rate and the fluidity of the flow field are used to evaluate whether the design scheme is reasonable. The consistency of the flow rate of each cylinder will affect the detection accuracy of the oxygen sensor for the oxygen ion concentration in the exhaust gas, and further affect the measurement and control of the air-fuel mixture concentration. Poor exhaust consistency will also cause uneven exhaust back pressure in each cylinder, affect the stability of the turbine inlet air pressure of the turbocharged engine, and lead to a large cyclic variation of the engine. The fluidity of the flow field will affect the charging efficiency of the engine. Excessive exhaust resistance will cause pumping losses and reduce the combustion efficiency of the engine. At the same time, the smaller the air flow vortex inside the exhaust manifold, the smaller the air flow noise. For a turbocharged engine, the exhaust manifold directly affects the utilization efficiency of the exhaust energy by the turbocharger. In the design, it is desired to maintain a high flow velocity at the outlet to ensure the response speed of the turbocharger. Therefore, an exhaust manifold with excellent fluidity and consistency plays a crucial role for a turbocharged engine model.

[0093] According to the vehicle of the embodiment of the present invention, by providing a flow guiding surface 21 on at least a part of the exhaust side pipe 20, the flow guiding surface 21 is used to guide the flow of the exhaust gas, and the exhaust gas is guided to the exhaust port 11, which improves the problem in the related art that the exhaust gas flows from one exhaust side pipe to the other exhaust side pipe due to inertia, improves the flow coefficient, enhances the fluidity, makes the gas flow smoothly, improves the fluidity and consistency, reduces the loss of the exhaust energy caused by the exhaust manifold 100, improves the utilization efficiency of the exhaust energy by the turbocharger, and improves the transient response of the turbocharger.

[0094] In some specific embodiments, the vehicle further includes an engine. There are two exhaust manifolds 100, and the two exhaust manifolds 100 are respectively arranged on opposite sides of the engine and communicate with the engine, making full use of the exhaust manifolds 100 and improving the utilization efficiency of the exhaust energy by the turbocharger.

[0095] In the description of this specification, the descriptions referring to terms such as "one embodiment", "some embodiments", "schematic embodiments", "examples", "specific examples", or "some examples", etc., mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0096] Although the embodiments of the present utility model have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and purposes of the present utility model, and the scope of the present utility model is defined by the claims and their equivalents.

Claims

1. An exhaust manifold of an engine, characterized in that: include: An exhaust main pipe (10), the exhaust main pipe (10) having an exhaust port (11), the exhaust port (11) being used to communicate with a supercharger; A plurality of exhaust side pipes (20), wherein the exhaust side pipes (20) are arranged on the exhaust main pipe (10), and the plurality of exhaust side pipes (20) are respectively arranged on two opposite sides of the exhaust main pipe (10); wherein: At least part of the inner wall of the exhaust side pipe (20) close to the exhaust main pipe (10) is at least partly configured as a guide surface (21), and the guide surface (21) extends in the direction of the exhaust port (11).

2. The exhaust manifold of the engine according to claim 1, characterized in that: A first intersection (22) is provided between the plurality of exhaust side pipes (20), and the guide surface (21) extends to connect to the first intersection (22).

3. The exhaust manifold of the engine according to claim 2, characterized in that: The plurality of exhaust side pipes (20) include a first exhaust side pipe (23) and a second exhaust side pipe (24); a second intersection (25) is provided between the first exhaust side pipe (23) and the exhaust main pipe (10); a third intersection (26) is provided between the second exhaust side pipe (24) and the exhaust main pipe (10); the first intersection (22) is connected to the second intersection (25) and the third intersection (26), respectively; the guide surface (21) extends to connect to the second intersection (25), and / or the guide surface (21) extends to connect to the third intersection (26).

4. The exhaust manifold of the engine according to claim 3, characterized in that: The first intersection (22), the second intersection (25), the third intersection (26), a portion of the inner wall of the exhaust main pipe (10), the inner wall of the first exhaust side pipe (23) and the inner wall of the second exhaust side pipe (24) jointly define a merging cavity (12), and the merging cavity (12) is connected to the exhaust port (11).

5. The exhaust manifold of the engine according to claim 4, characterized in that: The volume of the merging chamber (12) is V1, the total volume of the exhaust manifold (100) is V2, and 0.2≤V1 / V2≤0.

25.

6. The exhaust manifold of the engine according to claim 4, characterized in that: On the central axis of the first exhaust side pipe (23), the farthest distance between the first exhaust side pipe (23) and the midpoint of the exhaust port (11) is L1, and the farthest distance between the merging cavity (12) and the midpoint is L2, 1 / 7≤L2 / L1≤1 / 5; and / or, on the central axis of the second exhaust side pipe (24), the farthest distance between the second exhaust side pipe (24) and the midpoint of the exhaust port (11) is L3, and the farthest distance between the merging cavity (12) and the midpoint is L4, 1 / 7≤L4 / L3≤1 / 5.

7. The exhaust manifold of the engine according to claim 4, characterized in that: The exhaust main pipe (10) comprises an exhaust portion (13), the opening of the exhaust portion (13) being configured as the exhaust port (11), and an end of the exhaust port (11) away from the exhaust port (11) being connected to the merging chamber (12).

8. The exhaust manifold of the engine according to claim 1, characterized in that: The exhaust main pipe (10) comprises: A first pipeline (14), wherein the first pipeline (14) is provided with a first air inlet (141); A first arc-shaped pipeline (15), one end of the first arc-shaped pipeline (15) being connected to the first pipeline (14); A second pipe (16), the exhaust port (11) is arranged in the second pipe (16), and the second pipe (16) is connected to the other end of the first arc-shaped pipe (15).

9. The exhaust manifold of the engine according to claim 8, characterized in that: The exhaust side pipe (20) comprises: A third pipeline (27), wherein the third pipeline (27) is provided with a second air inlet (271); a second arc-shaped pipeline (28), one end of the second arc-shaped pipeline (28) being connected to the third pipeline (27); A fourth pipe (29), wherein the second pipe (16) is provided with a plurality of communication ports, the plurality of communication ports are respectively connected to the fourth pipe (29), and the fourth pipe (29) is connected to the other end of the second arc-shaped pipe (28); wherein: The communication port is at least partially disposed on a side surface of the second pipe (16) facing the first pipe (14).

10. A vehicle, characterized in that: An exhaust manifold (100) comprising any one of claims 1 to 9.

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