Exhaust structure, engine system, and vehicle

Abstract

The application belongs to the technical field of engines, and discloses an exhaust structure, an engine system and a vehicle. The exhaust structure is connected between a supercharger and an engine body, and comprises a connecting flange and a plurality of exhaust pipe groups. The connecting flange is provided with a plurality of airflow channels which are separated from each other by partitioning portions and are communicated with the supercharger. The exhaust pipe groups are one-to-one corresponding to the airflow channels and are communicated with the engine body. The projection of the outlet of the exhaust pipe group on the inner wall of the corresponding airflow channel in the air outlet direction does not completely coincide with the partitioning portion. The temperature distribution of the exhaust structure can be adjusted and balanced, so as to reduce thermal stress and improve thermal fatigue life.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of engines, in particular to an exhaust structure, an engine system and a vehicle. BACKGROUND

[0002] In an engine system, an exhaust structure is provided to connect an engine head and a supercharger. When the engine is working, exhaust gas enters the supercharger through the exhaust structure and drives the turbine to rotate, thereby compressing the air in the engine intake system. In this way, even at low speed, the supercharger can drive the turbine to rotate through the energy of the exhaust gas, thereby increasing the intake pressure of the engine. When the engine needs more power, the supercharger will increase the intake amount to provide more oxygen to support combustion, thereby increasing the output power of the engine.

[0003] At present, as shown in the prior art, Figure 1 In the exhaust structure provided with two supercharger intake passages 1, the two supercharger intake passages 1 are arranged side by side, and an intermediate partition plate is arranged therebetween to separate them. Part of the plurality of exhaust pipes 2 is connected to one supercharger intake passage 1, and another part of the plurality of exhaust pipes 2 is connected to the other supercharger intake passage 1, so as to form an approximate symmetrical structure with the center axis of the intermediate partition plate as the axis.

[0004] As shown in the prior art, Figure 2 The gas flow of the two supercharger intake passages 1 of the existing exhaust structure will change sharply at the intermediate partition plate, and due to the approximate symmetry of the above-mentioned exhaust structure, the heat convection at the position of the intermediate partition plate is strong, so that the temperature at the position of the intermediate partition plate is significantly higher than that of the surrounding structure. The significant temperature difference and the heat deformation without release will cause a large thermal stress at the root of the intermediate partition plate, thereby causing fatigue cracking.

[0005] Therefore, there is an urgent need for an exhaust structure, an engine system and a vehicle to solve the above problems. SUMMARY

[0006] According to one aspect of the present application, the purpose is to provide an exhaust structure, the temperature distribution of which can be adjusted and balanced, thereby reducing thermal stress and improving thermal fatigue life.

[0007] To achieve this purpose, the present application adopts the following technical solutions:

[0008] An exhaust structure connected between a supercharger and an engine body, comprising:

[0009] A connecting flange having a plurality of gas flow passages separated by a partitioning portion, the gas flow passages being connected to the supercharger;

[0010] A plurality of exhaust pipe groups corresponding to and communicating with the airflow flow channels and the engine body; the projection of the outlet of the exhaust pipe group on the inner wall of the corresponding airflow flow channel in the air outlet direction does not completely coincide with the partition.

[0011] As a preferred scheme of the exhaust structure provided by the application, the airflow flow channels are two, the exhaust pipe groups are two, the two airflow flow channels are arranged side by side, and the side-by-side arrangement direction of the two airflow flow channels is perpendicular to the arrangement direction of the two exhaust pipe groups.

[0012] As a preferred scheme of the exhaust structure provided by the application, a plurality of airflow flow channels are arranged side by side, the side-by-side arrangement direction of the plurality of airflow flow channels is parallel to the arrangement direction of the plurality of exhaust pipe groups, and the projection of the exhaust pipe group on the inner wall of the corresponding airflow flow channel in the air outlet direction is opposite to the partition.

[0013] As a preferred scheme of the exhaust structure provided by the application, the exhaust pipe group includes a plurality of exhaust manifolds and a manifold, the plurality of exhaust manifolds are connected in parallel with each other and are connected to the manifold, the manifold is connected to the airflow flow channel, and the projection of the outlet of the manifold on the inner wall of the corresponding airflow flow channel in the air outlet direction does not completely coincide with the partition.

[0014] As a preferred scheme of the exhaust structure provided by the application, the junctions of the exhaust manifolds and the manifold are all arc-shaped transitions.

[0015] As a preferred scheme of the exhaust structure provided by the application, the thickness of the partition is less than the minimum distance between the inner wall of the airflow flow channel and the circumferential edge of the connecting flange.

[0016] As a preferred scheme of the exhaust structure provided by the application, the connecting flange is provided with a plurality of connecting holes corresponding to the pre-designed openings on the supercharger, and the connecting member can be connected to the corresponding connecting hole and the pre-designed opening.

[0017] As a preferred scheme of the exhaust structure provided by the application, the connecting flange is provided with a sealing gasket on the abutting surface of the supercharger.

[0018] According to another aspect of the application, the object is to provide an engine system, which comprises an engine body, a supercharger and an exhaust structure according to any of the above schemes, the exhaust pipe group is connected to the engine body, and the airflow flow channel is connected to the air inlet of the supercharger.

[0019] According to another aspect of the application, the object is to provide a vehicle comprising an engine system according to the above scheme.

[0020] The beneficial effects of the present application are as follows:

[0021] The exhaust structure provided by the present application is connected between the supercharger and the engine body, and comprises a connecting flange and a plurality of exhaust pipe groups. The connecting flange is provided with a plurality of airflow channels separated by partitioning portions, and the airflow channels are connected to the supercharger. The exhaust pipe groups are in one-to-one correspondence with the airflow channels and are connected to the engine body. Through the connecting flange and the exhaust pipe groups, the connection between the multi-cylinder engine body and the supercharger can be realized, so as to guide the exhaust gas of the engine body into the supercharger for use, thereby improving the intake pressure of the engine body. The projection of the outlet of the exhaust pipe group on the inner wall of the corresponding airflow channel in the outlet direction does not completely coincide with the partitioning portion. Through the above-mentioned arrangement of the outlet of the exhaust pipe group and the partitioning portion, when the flow direction of the exhaust gas flow changes between the exhaust pipe group and the airflow channel, the large-area heat shock directly caused by the partitioning portion can be avoided, and the high-temperature zone can be transferred to other positions of the connecting flange, so that the temperature distribution of the connecting flange is adjusted and balanced, thereby reducing the thermal stress of the partitioning portion, avoiding fatigue cracks and other problems of the partitioning portion, and improving the thermal fatigue life of the exhaust structure.

[0022] The engine system provided by the present application is provided with the above-mentioned exhaust structure, and can improve the service life and avoid the adverse effects of thermal balance problems on the structural strength, the exhaust process of the engine body and the intake process of the engine body.

[0023] The vehicle provided by the present application is provided with the above-mentioned engine system, and the above-mentioned engine system can provide power for the vehicle, and has stable structure and can avoid the adverse effects of thermal balance problems, so as to reliably drive the vehicle. BRIEF DESCRIPTION OF DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the description of the embodiments of the present application will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor on the basis of the contents of the embodiments of the present application and the drawings.

[0025] Figure 1 is a structural schematic diagram of the existing exhaust structure;

[0026] Figure 2 is a temperature distribution cloud diagram of the existing exhaust structure;

[0027] Figure 3 is a schematic diagram of the exhaust structure provided by the first embodiment of the present application;

[0028] Figure 4 is a temperature distribution nephogram of the exhaust structure provided by the first embodiment of the present application;

[0029] Figure 5 is a schematic diagram of the exhaust structure provided by the second embodiment of the present application.

[0030] In the figure:

[0031] 1, intake flow passage of supercharger; 2, exhaust pipe;

[0032] 100, connecting flange; 110, partition; 120, airflow flow passage;

[0033] 200, exhaust pipe group; 210, exhaust manifold; 220, manifold. DETAILED DESCRIPTION

[0034] The technical solutions of the present application will be further described below in combination with the accompanying drawings and through specific embodiments.

[0035] In order to make the objectives, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions of the embodiments of the present application will be described clearly and completely below in combination with the accompanying drawings of the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments. The components of the embodiments of the present application described and shown in the accompanying drawings can be arranged and designed in various different configurations.

[0036] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without making creative efforts are within the scope of protection of the present application.

[0037] It should be noted that: similar reference numbers and letters represent similar items in the following drawings, therefore, once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.

[0038] In the description of the present application, it should be noted that the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings or the orientation or positional relationship in which the product of the present application is usually placed, and are merely for the convenience of describing and simplifying the present application, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", "third" and the like are only used to distinguish the description and cannot be understood as indicating or implying relative importance. In the description of the present application, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0039] In the description of the present application, it should be noted that, unless otherwise specified and limited, the terms "provided", "connected", "fixed" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0040] In the present application, unless otherwise specified and limited, "on" or "under" of the first feature to the second feature can include that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, "on", "above" and "above" of the first feature to the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. "Below", "below" and "below" of the first feature to the second feature includes that the first feature is directly below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0041] In the present embodiment, the term "and / or" is only a description of the association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B can represent the three cases of A alone, A and B together, and B alone. In addition, the character " / " in the present application generally represents that the front and rear associated objects have an "or" relationship.

[0042] The embodiments of the present application will be described in detail below, and examples of the embodiments are shown in the drawings, wherein the same or similar reference numerals represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by reference to the drawings are exemplary and are only used to explain the present application, and cannot be understood as a limitation on the present application.

[0043] Example 1

[0044] The embodiment provides an exhaust structure, an engine system and a vehicle.

[0045] The engine system provided by the embodiment comprises an engine body, a supercharger and the exhaust structure provided by the embodiment. The exhaust structure is communicated between the inside of the engine body and the supercharger, and can guide exhaust gas of the engine body into the supercharger for use, so as to improve the intake pressure of the engine body.

[0046] The vehicle provided by the embodiment comprises the engine system. The engine system can provide power for the vehicle, and has stable structure, can avoid the adverse effect of the heat balance problem, and can reliably drive the vehicle.

[0047] Figure 3 A schematic diagram of the exhaust structure provided by the embodiment one of the application is shown, Figure 4 A temperature distribution nephogram of the exhaust structure provided by the embodiment one of the application is shown, Figure 4 In the figure, the dotted arrow in the figure represents the airflow direction, the red color in the nephogram represents the high-temperature area, and the lower the degree of the color phase of each color area in the nephogram, the lower the temperature of the corresponding position area. Refer to Figure 3 and Figure 4 The exhaust structure provided by the embodiment comprises a connecting flange 100 and a plurality of exhaust pipe groups 200.

[0048] Specifically, the connecting flange 100 is provided with a plurality of airflow flow channels 120 which are separated from each other by a partition 110, and the airflow flow channels 120 are communicated with the intake port of the supercharger. The exhaust pipe groups 200 are one-to-one corresponding and communicated with the airflow flow channels 120, and are communicated with the engine body. Through the connecting flange 100 and the exhaust pipe groups 200, the communication between the engine body and the supercharger can be realized, so as to guide the exhaust gas of the engine body into the supercharger for use.

[0049] In the embodiment, the connecting flange 100 is specifically provided with two airflow flow channels 120, and the two airflow flow channels 120 are separated by a partition 110, and two exhaust pipe groups 200 are arranged corresponding to the two airflow flow channels 120.

[0050] Specifically, the projection of the outlet of the exhaust pipe group 200 on the inner wall of the corresponding airflow channel 120 in the outlet direction does not completely coincide with the partition 110. By setting the orientation of the outlet of the exhaust pipe group 200 to be misaligned with the partition 110 as described above, when the flow direction of the exhaust gas changes between the exhaust pipe group 200 and the airflow channel 120, the high-temperature area can be transferred to other positions of the connecting flange 100, so that the temperature distribution of the connecting flange 100 is adjusted and balanced, thereby reducing the thermal stress on the partition 110, avoiding fatigue cracks and other problems of the partition 110, and improving the thermal fatigue life of the exhaust structure.

[0051] With reference to the above Figure 3 and Figure 4 The exhaust pipe group 200 includes a plurality of exhaust manifolds 210 and a manifold 220. The plurality of exhaust manifolds 210 are parallel and spaced apart, and are all connected to the manifold 220. The manifold 220 is connected to the airflow channel 120, and the projection of the outlet of the manifold 220 on the inner wall of the corresponding airflow channel 120 in the outlet direction is misaligned with the partition 110.

[0052] Specifically, the junctions of the exhaust manifolds 210 and the manifold 220 are all arc-shaped transitions. By setting as described above, the junctions of the exhaust manifolds 210 and the manifold 220 can avoid having corners, which can affect the smoothness of the flow of exhaust gas.

[0053] As an option, the connecting flange 100 is provided with a plurality of connection holes corresponding to the pre-set openings on the supercharger, and bolts or other connecting members can be connected in the corresponding connection holes and the pre-set openings. The abutting surface of the connecting flange 100 for connecting the supercharger is specifically rectangular, and the connecting flange 100 is specifically provided with four connection holes arranged in a rectangular array at the four corners of the abutting surface. By the connection holes and the connecting members, the connecting flange 100 and the supercharger can be connected, and by setting a plurality of uniformly arranged connection holes, the connection reliability of the connecting flange 100 and the supercharger can be improved, and the stress uniformity of the connecting flange 100 can be improved.

[0054] As a preferred embodiment, the connecting flange 100 is provided with a sealing gasket on the abutting surface of the supercharger, which can improve the connection tightness between the connecting flange 100 and the structure around the inlet of the supercharger, and prevent exhaust gas leakage.

[0055] As an option, in the embodiment, the thickness of the partition 110 is less than the vertical distance between the inner wall of the airflow channel 120 and the periphery of the connecting flange 100. Through the above arrangement, the partition between the two airflow channels 120 can be achieved, and the inner diameter of the airflow channel 120 can be increased as much as possible, and the smoothness of the exhaust gas flowing in the airflow channel 120 is improved.

[0056] With reference to the foregoing Figure 3 and Figure 4 , in the embodiment, the two airflow channels 120 are arranged side by side, and the side-by-side arrangement direction of the two airflow channels 120 is perpendicular to the arrangement direction of the two groups of exhaust pipe groups 200. In the embodiment, the two airflow channels 120 are arranged in the vertical direction, and the two groups of exhaust pipe groups 200 are arranged in the horizontal direction. The manifold 220 connected to the upper airflow channel 120 extends towards the left side of the connecting flange 100, and the manifold 220 connected to the lower airflow channel 120 extends towards the right side of the connecting flange 100.

[0057] With reference to the foregoing Figure 4 , through the above arrangement, the outlet of the manifold 220 connected to the upper airflow channel 120 is projected on the inner wall of the corresponding airflow channel 120 in the outlet direction, and the projection falls on the right side of the airflow channel 120; and the outlet of the manifold 220 connected to the lower airflow channel 120 is projected on the inner wall of the corresponding airflow channel 120 in the outlet direction, and the projection falls on the left side of the airflow channel 120, so that the high-temperature zones in the two airflow channels 120 are concentrated at the periphery edge position of the connecting flange 100, rather than at the partition 110, to avoid the thermal fatigue effect on the partition 110. The two high-temperature zones are staggered in the horizontal direction and the vertical direction, thereby improving the uniformity of the heat received by the connecting flange 100.

[0058] Embodiment two

[0059] The embodiment provides an exhaust structure. Figure 5 A schematic view of the exhaust structure provided by the embodiment two of the present application is shown. With reference to the foregoing Figure 5 , the difference between the embodiment and the embodiment one is the relative state of the connecting flange 100 and the exhaust pipe group 200.

[0060] Specifically, the plurality of airflow channels 120 are arranged side by side, the side-by-side arrangement direction of the plurality of airflow channels 120 is parallel to the arrangement direction of the plurality of exhaust pipe groups 200, and the exhaust pipe groups 200 connected to different airflow channels 120 extend towards the direction where the corresponding airflow channels 120 are located. In the embodiment, two airflow channels 120 are arranged in the horizontal direction, and two exhaust pipe groups 200 are also arranged in the horizontal direction. However, the manifold 220 connected to the airflow channel 120 on the right side extends towards the left side of the connecting flange 100, and the manifold 220 connected to the airflow channel 120 on the left side extends towards the right side of the connecting flange 100, that is, the two manifolds 220 are arranged in a cross manner in space, so that the projection of the outlet of the manifold 220 on the inner wall of the corresponding airflow channel 120 in the air outlet direction is opposite to the partition 110.

[0061] Through the above structure, the projection of the outlet of the manifold 220 connected to the airflow channel 120 on the right side on the inner wall of the corresponding airflow channel 120 in the air outlet direction falls on the right side of the airflow channel 120, and the projection of the outlet of the manifold 220 connected to the airflow channel 120 on the left side on the inner wall of the corresponding airflow channel 120 in the air outlet direction falls on the left side of the airflow channel 120, so that the high-temperature zones in the two airflow channels 120 are concentrated at the circumferential edge position of the connecting flange 100, rather than the partition 110, to avoid the thermal fatigue effect on the partition 110. The two high-temperature zones are opposite and far away in the horizontal direction, which can improve the uniformity of the heat received by the connecting flange 100.

[0062] Obviously, the above embodiments of the present application are only examples for the purpose of clear illustration, and are not intended to limit the embodiments of the present application. For those skilled in the art, various obvious changes, re-adjustments and substitutions can be made without departing from the scope of the present application. It is not necessary or possible to exhaust all embodiments. Any modification, equivalent substitution and improvement within the spirit and principles of the present application shall be included in the protection scope of the claims of the present application.

Claims

1. An exhaust structure connected between a supercharger and an engine main body, characterized by, The application relates to an exhaust structure of an engine system. The exhaust structure comprises a connecting flange (100) provided with a plurality of airflow channels (120) separated by partitioning portions (110), the airflow channels (120) being communicated with the supercharger; a plurality of exhaust pipe groups (200) corresponding to the airflow channels (120) and being communicated with the engine body; the projection of the outlet of the exhaust pipe group (200) on the inner wall of the corresponding airflow channel (120) in the air outlet direction does not completely coincide with the partitioning portion (110); the exhaust pipe group (200) comprises a plurality of exhaust manifolds (210) and a manifold (220), the exhaust manifolds (210) being connected in parallel with each other and being communicated with the manifold (220), the manifold (220) being communicated with the airflow channel (120), and the projection of the outlet of the manifold (220) on the inner wall of the corresponding airflow channel (120) in the air outlet direction does not completely coincide with the partitioning portion (110). The airflow channels (120) are two, the exhaust pipe groups (200) are two, the two airflow channels (120) are arranged side by side, and the arrangement direction of the two airflow channels (120) is perpendicular to the arrangement direction of the two exhaust pipe groups (200). The airflow channels (120) are arranged side by side, the arrangement direction of the airflow channels (120) is parallel to the arrangement direction of the exhaust pipe groups (200), and the projection of the outlet of the exhaust pipe group (200) on the inner wall of the corresponding airflow channel (120) in the air outlet direction is opposite to the partitioning portion (110).

2. The exhaust structure according to claim 1, characterized by, The connection between the exhaust manifold (210) and the manifold (220) is arc-shaped.

3. The exhaust structure according to claim 1, characterized by, The thickness of the partitioning portion (110) is smaller than the minimum distance between the inner wall of the airflow channel (120) and the peripheral wall of the connecting flange (100).

4. The exhaust structure according to claim 1, characterized by, The connecting flange (100) is provided with a plurality of connecting holes corresponding to the preset openings on the supercharger, and a connecting member can be connected in the connecting holes and the preset openings.

5. The exhaust structure according to claim 1, characterized by, The connecting flange (100) is provided with a sealing gasket on the abutting surface of the supercharger.

6. The exhaust structure according to any one of claims 1 to 5, characterized by, The application relates to an engine system comprising an engine body, a supercharger and an exhaust structure as claimed in any one of claims 1-7, the exhaust pipe group (200) being connected to the engine body, and the airflow channel (120) being communicated with the air inlet of the supercharger.

7. The exhaust structure according to any one of claims 1 to 5, characterized by, The application relates to an engine system as claimed in claim 8.

8. An engine system characterized by, ​ 9. Vehicle, characterized in that ​

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