Exhaust structure, engine system and vehicle

Abstract

The invention 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 sets. The connecting flange is provided with a plurality of air flow channels which are separated from one another through partition parts, and the air flow channels are communicated with the supercharger. The exhaust pipe sets are in one-to-one correspondence with and communicated with the air flow channels and the engine body. And the projections of the outlets of the exhaust pipe group on the inner wall of the corresponding air flow channel along the air outlet direction are not completely overlapped with the partition part. The temperature distribution of the exhaust structure can be adjusted and balanced, so that the thermal stress is reduced, and the thermal fatigue life is prolonged.

Description

Technical Field

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

[0002] In the engine system, an exhaust structure is provided to connect the engine cylinder head and the supercharger. When the engine is working, the 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 speeds, 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 volume, provide more oxygen to support combustion, and thus increase the output power of the engine.

[0003] Currently, if Figure 1 As shown, in the exhaust structure with two supercharger inlet flow passages 1, the two supercharger inlet flow passages 1 are arranged side by side, and a middle partition is arranged between them for partitioning. A part of the multiple exhaust pipes 2 is connected to one supercharger inlet flow passage 1, and another part of the multiple exhaust pipes 2 is connected to another supercharger inlet flow passage 1, with the central axis of the middle partition as the axis, forming an approximately symmetrical structure.

[0004] like Figure 2 As shown in the figure (the dotted arrow in the figure indicates the direction of airflow, the red color in the cloud map indicates the high temperature area, and the lower the warmth of the hue of each color area in the cloud map, the lower the temperature of the corresponding position area), the airflow in the two supercharger inlet flow channels 1 of the existing exhaust structure will suddenly change the direction of the airflow at the middle partition, and because the above-mentioned exhaust structure is approximately symmetrical, the convective heat exchange at the position of the middle partition is strong, so that the temperature at the position of the middle partition is significantly higher than that of the surrounding structure. The significant temperature difference and the thermal deformation with nowhere to release will cause a large thermal stress at the root of the middle partition, thereby causing fatigue cracking problems.

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

[0006] According to one aspect of the present invention, an object is to provide an exhaust structure whose temperature distribution can be adjusted and balanced, thereby reducing thermal stress and increasing thermal fatigue life.

[0007] To achieve this object, the present invention adopts the following technical solutions:

[0008] The exhaust structure is connected between the supercharger and the engine body and includes:

[0009] A connecting flange is provided with a plurality of air flow passages separated from each other by partitions, wherein the air flow passages are connected to the supercharger;

[0010] A plurality of exhaust pipe groups, the exhaust pipe groups correspond one to one and are connected to the airflow channel and the engine body; the projection of the outlet of the exhaust pipe group along the exhaust direction on the inner wall of the corresponding airflow channel does not completely overlap with the partition part.

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

[0012] As a preferred solution of the exhaust structure provided by the present invention, a plurality of the airflow channels are arranged side by side, and the side-by-side arrangement direction of the plurality of the airflow 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 channel along the exhaust direction is opposite to the partition portion.

[0013] As a preferred solution of the exhaust structure provided by the present invention, the exhaust pipe group includes a plurality of exhaust manifolds and a confluence pipe, the plurality of exhaust manifolds are connected in parallel to each other and are all connected to the confluence pipe, the confluence pipe is connected to the airflow channel, and the projection of the outlet of the confluence pipe along the exhaust direction on the inner wall of the corresponding airflow channel does not completely overlap with the partition portion.

[0014] As a preferred solution of the exhaust structure provided by the present invention, the connection between the exhaust manifold and the manifold is an arc-shaped transition.

[0015] As a preferred solution of the exhaust structure provided by the present invention, the thickness of the partition portion is smaller than the minimum distance between the inner wall of the air flow channel and the peripheral edge of the connecting flange.

[0016] As a preferred solution of the exhaust structure provided by the present invention, the connecting flange is provided with a plurality of connecting holes, the connecting holes correspond to the preset openings on the supercharger, and the connecting members can be connected to the corresponding connecting holes and the preset openings.

[0017] As a preferred solution of the exhaust structure provided by the present invention, a sealing gasket is provided on the abutment surface of the connecting flange butted against the supercharger.

[0018] According to another aspect of the present invention, an object is to provide an engine system, which includes an engine body, a supercharger and an exhaust structure as described in any of the above schemes, the exhaust pipe group is connected to the engine body, and the air flow channel is connected to the air intake of the supercharger.

[0019] According to yet another aspect of the present invention, an object is to provide a vehicle, the vehicle comprising the engine system as described in the above solution.

[0020] Beneficial effects of the present invention:

[0021] The exhaust structure provided by the present invention is connected between the supercharger and the engine body, and includes a connecting flange and multiple exhaust pipe groups. The connecting flange is provided with multiple airflow channels separated from each other by a partition, and the airflow channels are connected to the supercharger. The exhaust pipe groups correspond to and are connected to the airflow channels one by one, and are connected to the engine body. Through the connecting flange and the exhaust pipe group, the connection between the multi-cylinder engine body and the supercharger can be achieved, so that the exhaust gas of the engine body can be introduced into the supercharger for use, thereby increasing 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 along the exhaust direction does not completely overlap with the partition. By setting the orientation of the outlet of the exhaust pipe group not completely overlapping with the partition part, it is possible to avoid direct large-area heat shock to the partition part when the exhaust gas flow changes direction between the exhaust pipe group and the airflow channel, causing the partition part to always be in the high-temperature zone. Instead, the high-temperature zone can be transferred to other positions of the connecting flange, so that the temperature distribution of the connecting flange can be adjusted and balanced, thereby reducing the thermal stress on the partition part, avoiding problems such as fatigue cracks in the partition part, and improving the thermal fatigue life of the exhaust structure.

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

[0023] The vehicle provided by the present invention is provided with the above-mentioned engine system, which can provide power for the vehicle, has a stable structure, can avoid the adverse effects caused by thermal balance problems, and reliably drive the vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the contents of the embodiments of the present invention and these drawings without paying any creative work.

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

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

[0027] Figure 3 is a schematic diagram of an exhaust structure provided in Embodiment 1 of the present invention;

[0028] Figure 4 is a temperature distribution cloud diagram of the exhaust structure provided in the first embodiment of the present invention;

[0029] Figure 5 It is a schematic diagram of the exhaust structure provided in the second embodiment of the present invention.

[0030] In the figure:

[0031] 1. Supercharger intake flow channel; 2. Exhaust pipe;

[0032] 100, connecting flange; 110, partition portion; 120, air flow channel;

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

[0034] The technical solution of the present invention is further described below with reference to the accompanying drawings and through specific implementation methods.

[0035] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0036] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0037] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0038] In the description of the present invention, it should be noted that the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or are the positions or positional relationships in which the inventive product is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0039] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "connect", and "fix" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0040] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0041] In this embodiment, the term "and / or" is only a description of the association relationship of the associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in the present invention generally indicates that the associated objects before and after are in an "or" relationship.

[0042] Embodiments of the present invention are described in detail below, 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 only used to explain the present invention, and cannot be understood as limiting the present invention.

[0043] Embodiment 1

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

[0045] The engine system provided in this embodiment includes an engine body, a supercharger and an exhaust structure provided in this embodiment. The exhaust structure is connected between the interior of the engine body and the supercharger, and can guide the exhaust gas of the engine body to the supercharger for use in increasing the intake pressure of the engine body.

[0046] The vehicle provided in this embodiment includes the above engine system. The above engine system can provide power for the vehicle, has a stable structure, can avoid the adverse effects caused by the thermal balance problem, and can reliably drive the vehicle.

[0047] Figure 3 A schematic diagram showing an exhaust structure provided in Embodiment 1 of the present invention is shown. Figure 4 The temperature distribution cloud diagram of the exhaust structure provided by the first embodiment of the present invention is shown. Figure 4 In the figure, the dotted arrows indicate the direction of airflow, and the red color in the cloud map indicates the high temperature area. The lower the warmth of the hue of each color area in the cloud map, the lower the temperature of the corresponding location area. Figure 3 and Figure 4 The exhaust structure provided in this embodiment includes a connecting flange 100 and a plurality of exhaust pipe groups 200 .

[0048] Specifically, the connection flange 100 is provided with a plurality of airflow channels 120 separated from each other by the partition 110, and the airflow channels 120 are connected to the air inlet of the supercharger. The exhaust pipe group 200 corresponds to and is connected to the airflow channels 120 one by one, and is connected to the engine body. Through the connection flange 100 and the exhaust pipe group 200, the connection between the engine body and the supercharger can be achieved, so that the exhaust gas of the engine body can be introduced into the supercharger for use.

[0049] In this embodiment, two air flow channels 120 are specifically disposed on the connection flange 100 , and the two air flow channels 120 are separated by a partition portion 110 , and two exhaust pipe groups 200 are disposed corresponding to the two air flow channels 120 .

[0050] More specifically, the projection of the outlet of the exhaust pipe group 200 on the inner wall of the corresponding airflow channel 120 along the air outlet direction does not completely overlap with the partition part 110. By setting the direction of the outlet of the exhaust pipe group 200 and the partition part 110 to be not completely overlapped by the above-mentioned offset setting, it is possible to avoid the exhaust gas flow from directly causing a large-area heat shock to the partition part 110 when the flow direction changes between the exhaust pipe group 200 and the airflow channel 120, causing the partition part 110 to always be in the high-temperature zone. Instead, the high-temperature zone 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 part 110, avoiding problems such as fatigue cracks in the partition part 110, and improving the thermal fatigue life of the exhaust structure.

[0051] Continue to refer to 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 connected in parallel and arranged at intervals, and are all connected to the manifold 220. The manifold 220 is connected to the air flow channel 120, and the projection of the outlet of the manifold 220 on the inner wall of the corresponding air flow channel 120 along the air outlet direction is offset and misaligned with the partition portion 110.

[0052] Specifically, the junctions between the exhaust manifold 210 and the manifold 220 are all arc-shaped transitions. Through the above arrangement, it is possible to avoid the occurrence of corners and the like at the junctions between the exhaust manifold 210 and the manifold 220, which would affect the smoothness of the flow of the exhaust gas.

[0053] As an option, the connection flange 100 is provided with a plurality of connection holes, which correspond to the preset openings on the supercharger, and bolts and other connecting parts can be connected to the corresponding connection holes and the preset openings. The abutment surface of the connection flange 100 for connecting the supercharger is specifically rectangular, and the connection flange 100 is specifically provided with four connection holes, which are arranged in a rectangular array at the four vertex corners of the abutment surface of the connection flange 100. Through the above-mentioned connection holes and connecting parts, the connection of the connection flange 100 and the supercharger can be achieved. By setting a plurality of connection holes that are evenly arranged, the connection reliability of the connection flange 100 and the supercharger can be improved, and the force uniformity of the connection flange 100 can be improved.

[0054] Preferably, a sealing gasket is provided on the abutting surface of the connecting flange 100 abutting against the supercharger, and the sealing gasket can improve the tightness of the connection between the connecting flange 100 and the peripheral structure of the air inlet of the supercharger to prevent exhaust gas leakage.

[0055] Optionally, in this embodiment, the thickness of the partition portion 110 is smaller 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, thereby improving the smoothness of the exhaust gas flowing in the airflow channel 120.

[0056] Continue to refer to Figure 3 and Figure 4 In this embodiment, two of the 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 exhaust pipe groups 200. In this embodiment, the two airflow channels 120 are arranged at intervals in the vertical direction, and the two exhaust pipe groups 200 are arranged in sequence in the horizontal direction. The manifold 220 connected to the upper airflow channel 120 extends toward the left side of the connecting flange 100, and the manifold 220 connected to the lower airflow channel 120 extends toward the right side of the connecting flange 100.

[0057] Reference Figure 4 Through the above-mentioned structural setting, the projection of the outlet of the manifold 220 connected to the upper airflow channel 120 on the inner wall of the corresponding airflow channel 120 along the air outlet direction can be made to fall on the right side of the airflow channel 120; and the projection of the outlet of the manifold 220 connected to the lower airflow channel 120 on the inner wall of the corresponding airflow channel 120 along the air outlet direction can be made to fall on the left side of the airflow channel 120, thereby concentrating the high-temperature areas in the two airflow channels 120 on the peripheral edge of the connecting flange 100, rather than on the partition part 110, to avoid thermal fatigue effects on the partition part 110. The two high-temperature areas are staggered in both the horizontal and vertical directions, thereby improving the heating uniformity of the connecting flange 100.

[0058] Embodiment 2

[0059] This embodiment provides an exhaust structure. Figure 5 The schematic diagram of the exhaust structure provided by the second embodiment of the present invention is shown. Figure 5 The difference between this embodiment and the first embodiment lies in the relative state of the connecting flange 100 and the exhaust pipe assembly 200 .

[0060] Specifically, a plurality of the airflow channels 120 are arranged side by side, and the side-by-side arrangement direction of the plurality of the 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 in the direction of the non-corresponding airflow channels 120. In this embodiment, the two airflow channels 120 are arranged at intervals in the horizontal direction, and the two exhaust pipe groups 200 are also arranged in sequence in the horizontal direction. However, the manifold 220 connected to the airflow channel 120 located on the right side extends toward the left side of the connecting flange 100, and the manifold 220 connected to the airflow channel 120 located on the left side extends toward the right side of the connecting flange 100, that is, the two manifolds 220 are arranged crosswise in space, so that the projection of the outlet of the manifold 220 on the inner wall of the corresponding airflow channel 120 along the air outlet direction can be relatively far away from the partition 110.

[0061] Through the above-mentioned structural setting, the projection of the outlet of the manifold 220 connected to the right-side airflow channel 120 on the inner wall of the corresponding airflow channel 120 along the air outlet direction can be made to fall on the right side of the airflow channel 120; and the projection of the outlet of the manifold 220 connected to the left-side airflow channel 120 on the inner wall of the corresponding airflow channel 120 along the air outlet direction can be made to fall on the left side of the airflow channel 120, thereby concentrating the high-temperature areas in the two airflow channels 120 on the peripheral edge of the connecting flange 100 instead of concentrating on the partition part 110, so as to avoid the thermal fatigue effect on the partition part 110. Moreover, the two high-temperature areas are directly opposite and far away in the horizontal direction, which can improve the heating uniformity of the connecting flange 100.

[0062] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. Exhaust structure, connected between the supercharger and the engine body, characterized in that: include: A connecting flange (100) is provided with a plurality of air flow channels (120) separated from each other by partitions (110), wherein the air flow channels (120) are connected to the supercharger; A plurality of exhaust pipe groups (200), the exhaust pipe groups (200) corresponding one to one and connected to the airflow channel (120), and connected to the engine body; the projection of the outlet of the exhaust pipe group (200) along the air outlet direction on the inner wall of the corresponding airflow channel (120) does not completely overlap with the partition part (110).

2. The exhaust structure according to claim 1, characterized in that: There are two air flow channels (120), there are two exhaust pipe groups (200), the two air flow channels (120) are arranged side by side, and the side-by-side arrangement direction of the two air flow channels (120) is perpendicular to the arrangement direction of the two exhaust pipe groups (200).

3. The exhaust structure according to claim 1, characterized in that: A plurality of the airflow channels (120) are arranged side by side, and the side-by-side arrangement direction of the plurality of the airflow channels (120) is parallel to the arrangement direction of the plurality of exhaust pipe groups (200), and the projection of the outlet of the exhaust pipe group (200) along the exhaust direction onto the inner wall of the corresponding airflow channel (120) is opposite to the partition portion (110).

4. The exhaust structure according to claim 1, characterized in that: The exhaust pipe group (200) comprises a plurality of exhaust manifolds (210) and a confluence pipe (220); the plurality of exhaust manifolds (210) are connected in parallel to each other and are all connected to the confluence pipe (220); the confluence pipe (220) is connected to the air flow channel (120); and the projection of the outlet of the confluence pipe (220) on the inner wall of the corresponding air flow channel (120) along the air outlet direction does not completely overlap with the partition portion (110).

5. The exhaust structure according to claim 4, characterized in that: The connection points between the exhaust manifold (210) and the manifold (220) are both arc-shaped transitions.

6. The exhaust structure according to claim 1, characterized in that: The thickness of the partition portion (110) is smaller than the minimum distance between the inner wall of the air flow channel (120) and the peripheral wall of the connecting flange (100).

7. The exhaust structure according to any one of claims 1 to 6, characterized in that: The connection flange (100) is provided with a plurality of connection holes, the connection holes corresponding to the preset openings on the supercharger, and the connection pieces can be connected to the corresponding connection holes and the preset openings.

8. The exhaust structure according to any one of claims 1 to 6, characterized in that: A sealing gasket is provided on the abutting surface of the connecting flange (100) butted against the supercharger.

9. An engine system, characterized in that It comprises an engine body, a supercharger and an exhaust structure as claimed in any one of claims 1 to 8, wherein the exhaust pipe group (200) is connected to the engine body, and the air flow channel (120) is connected to the air inlet of the supercharger.

10. A vehicle, characterized in that Comprising the engine system of claim 9.

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