Cover, engine and vehicle

Abstract

This application discloses a cover, an engine, and a vehicle. The cover includes a cover body, a separation plate, and a first separation element. The cover body has a receiving cavity with an inlet and an outlet. The separation plate and the first separation element are installed in the receiving cavity. The separation plate has at least one first hole, through which the inlet and outlet communicate. The flow area of ​​the first hole gradually decreases in the direction from the inlet to the outlet. The first separation element is located on the side of the separation plate facing the outlet direction and is adapted to separate liquid from the gas-liquid mixture flowing through it. According to the cover of this application, by gradually reducing the flow area of ​​the first hole in the direction from the inlet to the outlet, the flow velocity of the gas-liquid mixture flowing through the first hole is increased, the impact force of the gas-liquid mixture flowing out of the first hole on the first separation element is increased, and more liquid is more easily retained on the first separation element, thereby improving the gas-liquid separation efficiency of the cover.

Description

Technical Field

[0001] This application relates to the field of vehicle technology, and more specifically, to a cover, an engine, and a vehicle. Background Technology

[0002] In related technologies, a gas-liquid mixture (such as exhaust gas mixed with oil) enters from the inlet of the engine cover. The gas-liquid mixture is separated by different separators inside the cover. The separated liquid flows back into the engine, and the separated gas is discharged from the outlet of the cover. However, the existing separators inside the cover have low efficiency in separating the gas-liquid mixture, resulting in the discharged gas carrying a lot of liquid, which cannot meet the usage requirements. Utility Model Content

[0003] This application aims to at least partially address one of the aforementioned technical problems in the prior art. To this end, this application proposes a cover that improves the gas-liquid separation efficiency of gas-liquid mixtures.

[0004] This application also proposes an engine having the aforementioned cover.

[0005] This application also proposes a vehicle having the aforementioned engine.

[0006] According to an embodiment of this application, the cover includes a cover body, a separation plate, and a first separation member. The cover body has a receiving cavity with an inlet and an outlet. The separation plate and the first separation member are installed in the receiving cavity. The separation plate has at least one first hole. The inlet and the outlet communicate through the first hole. In the direction from the inlet to the outlet, the flow area of ​​the first hole gradually decreases. The first separation member is located on the side of the separation plate facing the outlet direction. The first separation member is adapted to separate the liquid in the gas-liquid mixture flowing through the first separation member.

[0007] According to the embodiments of this application, by gradually reducing the flow area of ​​the first hole in the direction from the inlet to the outlet, the flow rate of the gas-liquid mixture flowing through the first hole is increased, the impact force of the gas-liquid mixture flowing out of the first hole on the first separator is increased, and more liquid is more easily retained on the first separator, thereby improving the gas-liquid separation efficiency of the cover for the gas-liquid mixture.

[0008] According to some embodiments of this application, the flow area of ​​the first orifice decreases linearly in the direction from the inlet to the outlet.

[0009] According to some embodiments of this application, the first separator is connected to the separator plate.

[0010] According to some embodiments of this application, the first separating element includes a separating medium for absorbing liquid in a gas-liquid mixture flowing through the separating medium.

[0011] According to some embodiments of this application, the separation medium is a fabric.

[0012] According to some embodiments of this application, the thickness of the separation plate is 3mm to 4mm in the direction from the inlet to the outlet.

[0013] According to some embodiments of this application, the cover further includes a pressure relief valve, which is installed on the cover body and located on the side of the separation plate near the outlet, and the pressure relief valve is adapted to control the opening or closing of the outlet.

[0014] According to some embodiments of this application, the cover further includes a grille connected to the cover body, the grille being located on the side of the separation plate facing the inlet within the receiving cavity, at least a portion of the grille being constructed as a mesh, and the grille performing gas-liquid separation on the gas-liquid mixture flowing through the grille.

[0015] An engine according to another embodiment of this application includes a housing and the aforementioned cover, the housing having a working chamber, the cover covering the housing, the inlet communicating with the working chamber, and the outlet communicating with the external environment.

[0016] According to another embodiment of the engine of this application, the cover increases the flow rate of the gas-liquid mixture when it flows through the first hole by gradually reducing the flow area of ​​the first hole in the direction from the inlet to the outlet, thereby increasing the impact force of the gas-liquid mixture flowing out of the first hole on the first separator and making it easier for more liquid to be retained on the first separator, thereby improving the gas-liquid separation efficiency of the cover for the gas-liquid mixture.

[0017] The vehicle according to another aspect of this application includes the engine described above.

[0018] According to another embodiment of the vehicle, the engine cover of the vehicle gradually reduces the flow area of ​​the first hole in the direction from the inlet to the outlet, thereby increasing the flow rate of the gas-liquid mixture flowing through the first hole, increasing the impact force of the gas-liquid mixture flowing out of the first hole on the first separator, and making it easier for more liquid to be retained on the first separator, thereby improving the gas-liquid separation efficiency of the cover for the gas-liquid mixture.

[0019] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0020] Figure 1 This is a perspective cross-sectional view of the cover according to an embodiment of this application;

[0021] Figure 2 This is a front cross-sectional view of the cover according to an embodiment of this application;

[0022] Figure 3 This is a perspective view of the first separation component according to an embodiment of this application;

[0023] Figure 4 This is a front view of the first detached component according to an embodiment of this application;

[0024] Figure 5 This is a cross-sectional view of the first separated component according to an embodiment of this application;

[0025] Figure 6 This is a schematic diagram of the second separator and the blocking member according to an embodiment of this application.

[0026] Figure label:

[0027] Cover 10, cover body 1, inlet 11, outlet 12, blocking component 13, first hole 21, first separation component 2, separation plate 22, first separation component 23, horizontal plate 24, second separation component 4, separation channel 41, partition wall 42, blocking support arm 43, pressure relief valve 5, grille 3. Detailed Implementation

[0028] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein 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 with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application.

[0029] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0030] The following is combined Figures 1-6 The present application describes in detail a cover 10, an engine having the cover 10, and a vehicle having the engine, according to embodiments thereof.

[0031] See Figures 1-4As shown, the cover 10 according to an embodiment of this application may include a cover body 1, a separation plate 22 and a first separation member 23. The cover body 1 has a receiving cavity with an inlet 11 and an outlet 12. The separation plate 22 and the first separation member 23 are installed in the receiving cavity. The separation plate 22 has at least one first hole 21. The inlet 11 and the outlet 12 are connected through the first hole 21. In the direction from the inlet 11 to the outlet 12, the flow area of ​​the first hole 21 gradually decreases. The first separation member 23 is located on the side of the separation plate 22 facing the outlet 12. The first separation member 23 is adapted to separate the liquid in the gas-liquid mixture flowing through the first separation member 23.

[0032] Specifically, the gas-liquid mixture entering the containment cavity from the inlet 11 flows to the first separator 23 through the first hole 21. After being separated and filtered by the first separator 23, it is discharged from the outlet 12. The first separator 23 can perform gas-liquid separation on the gas-liquid mixture flowing out from the first hole 21 of the separation plate 22, discharging the gas in the gas-liquid mixture from the cover 10 through the outlet 12, and leaving at least a portion of the liquid in the gas-liquid mixture. This achieves the gas-liquid separation effect of the gas-liquid mixture, reduces the amount of liquid discharged from the cover 10 with the gas, and avoids excessive waste of liquid.

[0033] The flow area of ​​the first hole 21 gradually decreases from the inlet 11 to the outlet 12, which increases the flow velocity of the gas-liquid mixture when it passes through the first hole 21. The impact force of the gas-liquid mixture flowing out of the first hole 21 on the first separator 23 increases, making it easier for the liquid to remain on the first separator 23. Compared with the related art where the flow area of ​​the first hole is constant, this application sets the flow area of ​​the first hole 21 to gradually decrease from the inlet 11 to the outlet 12, which makes the gas-liquid separation efficiency and separation effect of the first separator 23 better, thereby improving the overall separation efficiency of the cover 10 for the gas-liquid mixture.

[0034] Optionally, the first hole 21 can be one, two, three, four, five, or more. The specific number may vary depending on the actual use, and this application does not impose any restrictions.

[0035] It should be understood that in the case of the flow area gradually decreasing in the above-mentioned "in the direction from inlet 11 to outlet 12, the flow area of ​​the first hole 21 gradually decreases", the first hole 21 can be a regularly changing conical hole (for example, the shape of the first hole 21 is a hole surrounded by the side of a frustum or pyramid), a frustum hole, etc., or it can be an irregularly shaped curved contraction hole, a variable cross-section polygonal hole, etc., or it can be a multi-stage contraction hole caused by a special structure, etc.

[0036] In this context, a curved contraction orifice can be understood as an orifice whose inner wall is composed of a curve, gradually contracting towards the center from the inlet 11 to the outlet 12. For example, the orifice wall of the first orifice 21 can be a curved surface formed by rotating an elliptical arc or other irregular curve around a central axis, with the flow area gradually decreasing along the flow direction, but the rate of decrease may be uneven.

[0037] A variable cross-section polygonal orifice can be understood as an inlet 11 being a larger polygon, such as a hexagon, and an outlet 12 being a smaller polygon, such as a triangle. From inlet 11 to outlet 12, the side length of the polygon gradually decreases, and the interior angles may also change, causing the flow area to gradually decrease. The trend of decreasing flow area may be different at different sides and corners.

[0038] A multi-stage contraction orifice can be understood as the first orifice 21 being composed of multiple sections of different diameters, resembling a stepped structure. The diameter of each stage is smaller than the previous stage, arranged sequentially from the inlet 11 to the outlet 12, with the flow area gradually decreasing in a stepped manner. For example, the orifice can be composed of three cylindrical sections of different diameters, with the cylinder near the inlet 11 having the largest diameter, the middle section the next largest, and the cylinder near the outlet 12 having the smallest diameter.

[0039] Optionally, the gas-liquid mixture in this application can be an oil-gas mixture, an air-water mixture, a steam-water mixture, a carbon dioxide-water mixture, etc. For example, when the cover is applied to an engine, the gas-liquid mixture is an oil-gas mixture, specifically exhaust gas mixed with oil.

[0040] In related technologies, the gas-liquid mixture enters from the inlet of the engine cover, and is separated by different separators inside the cover. The separated liquid flows back into the engine, and the separated gas is discharged from the outlet of the cover. However, the existing separators inside the cover have low efficiency in separating the gas-liquid mixture, resulting in the discharged gas carrying a lot of liquid, which cannot meet the usage requirements.

[0041] According to the embodiment of this application, the cover 10 gradually reduces the flow area of ​​the first hole 21 in the direction from the inlet 11 to the outlet 12, thereby increasing the flow rate of the gas-liquid mixture flowing through the first hole 21, increasing the impact force of the gas-liquid mixture flowing out of the first hole 21 on the first separator 23, and making it easier for more liquid to be retained on the first separator 23, thereby improving the gas-liquid separation efficiency of the cover 10 for the gas-liquid mixture.

[0042] In some embodiments of this application, see Figure 3 , Figure 4As shown, the flow area of ​​the first orifice 21 decreases linearly from inlet 11 to outlet 12. Specifically, compared to a non-uniformly changing flow area, the linearly decreasing flow area makes the flow of the gas-liquid mixture smoother, preventing eddies or turbulence from occurring during the flow. Eddies and turbulence can obstruct the flow of the gas-liquid mixture or reduce its velocity. Therefore, the linearly changing flow area increases the flow rate of the gas-liquid mixture, thereby improving the overall gas-liquid separation efficiency of the cover 10.

[0043] In some embodiments of this application, see Figures 1-4 As shown, the first separating component 23 is connected to the separating plate 22.

[0044] Specifically, the first separator 23 and the separator 22 together form the first separator assembly 2. The gas-liquid mixture entering the containment cavity from the inlet 11 flows to the first separator 23 through the first hole 21. After being filtered by the first separator 23, it is discharged from the outlet 12. The first separator 23 can perform gas-liquid separation on the gas-liquid mixture flowing out from the first hole 21 of the separator 22, discharging the gas in the gas-liquid mixture from the cover 10 through the outlet 12, and leaving at least a portion of the liquid in the gas-liquid mixture. This achieves the gas-liquid separation effect of the gas-liquid mixture, reduces the amount of liquid discharged from the cover 10 with the gas, and avoids excessive waste of liquid.

[0045] In some embodiments of this application, see Figures 1-4 As shown, the first separator 23 includes a separation medium for absorbing liquid from the gas-liquid mixture flowing through it. In other words, the separation medium of the first separator 23 can perform gas-liquid separation on the gas-liquid mixture flowing out from the first hole 21 of the separator plate 22.

[0046] Specifically, by adsorbing the liquid in the gas-liquid mixture through the separation medium, the gas in the gas-liquid mixture is discharged from the cover 10 through the outlet 12, while at least a portion of the liquid in the gas-liquid mixture remains in the separation medium. This achieves gas-liquid separation of the gas-liquid mixture, reduces the amount of liquid discharged from the cover 10 with the gas, and avoids excessive waste of liquid. At the same time, the separation medium can also promote the aggregation of tiny liquid particles into larger droplets. When the droplets are large enough, they will fall off the separation medium due to gravity, facilitating recovery and reuse.

[0047] Alternatively, the separation medium can be fabric, metal filter screen, ceramic filter element, activated carbon, etc.

[0048] For example Figures 1-4As shown, the separation medium is fabric. Specifically, the first separating element 23 may include a fabric plate, on which the fabric is disposed. The fabric has a certain porous structure and a large specific surface area, which can effectively intercept and adsorb the liquid in the gas-liquid mixture. The liquid is adsorbed and retained inside the fabric under the action of the surface tension of the fabric fibers, while the gas can continue to flow through the pores of the fabric, thereby achieving efficient gas-liquid separation.

[0049] In some embodiments of this application, see Figure 4 As shown, the thickness L1 of the separator 22 is 3mm to 4mm in the direction from inlet 11 to outlet 12. Specifically, by limiting the thickness L1 of the separator 22 to between 3mm and 4mm, sufficient structural support is provided for the separator 22, preventing it from being too thin and thus less prone to deformation or damage when subjected to the pressure of the gas-liquid mixture flow. Conversely, an excessively thick L1 may increase the flow resistance of the gas-liquid mixture, leading to increased energy loss and a decrease in the flow velocity. By setting L1 ≤ 4mm, the flow resistance of the gas-liquid mixture is lower, energy loss is lower, and the flow velocity of the gas-liquid mixture is higher.

[0050] Optionally, the thickness L1 of the separation plate 22 can be 3 mm, 3.5 mm, 4 mm or other thickness values ​​between 3 mm and 4 mm.

[0051] In some embodiments of this application, see Figure 1 , Figure 2 , Figure 6 As shown, the cover 10 also includes a second separator 4, which is located on the side of the separator 22 facing the inlet 11. The second separator 4 includes at least one separator channel 41 that connects the inlet 11 and the first hole 21. The separator channel 41 is at least partially constructed as an arcuate structure.

[0052] Specifically, the gas-liquid mixture entering the receiving cavity from inlet 11 flows through separation channel 41 to the first hole 21. As the gas-liquid mixture flows in the arc-shaped separation channel 41, centrifugal force is generated. Due to the density difference between gas and liquid, under the action of centrifugal force, the liquid is more easily thrown towards the side wall of the separation channel 41 (e.g., ...). Figure 6The partition wall 42 and the blocking arm 43 shown are used to separate the gas, while the gas tends to flow more within the separation channel 41, thus achieving preliminary gas-liquid separation. Before the gas-liquid mixture flows into the separation plate 22 and the first separator 23, the gas-liquid mixture flowing in from the inlet 11 is initially separated by the second separator 4, which effectively reduces the amount of liquid entering the separation plate 22. Multiple separators (such as the first separator 23 and the second separator 4) are connected in series, enabling multiple gas-liquid separation of the gas-liquid mixture within the containment cavity, thereby improving the overall gas-liquid separation efficiency and effect of the cover 10.

[0053] In some embodiments of this application, see Figure 1 , Figure 2 , Figure 6 As shown, the second separator 4 includes multiple partition walls 42, which are separated from each other. A separation channel 41 is formed between any two adjacent partition walls 42. The partition walls 42 extend non-linearly in the direction from the inlet 11 to the outlet 12 (e.g., Figure 6 The partition wall 42 shown extends non-linearly from right to left, and the gas-liquid mixture flows from... Figure 2 , Figure 6 As shown on the right, the second separator 4 enters. Specifically, the partition wall 42 extends non-linearly from the inlet 11 to the outlet 12, and the separation channel 41 also extends non-linearly, causing the gas-liquid mixture to change direction multiple times as it flows within the separation channel 41. Each turn causes further separation of the gas and liquid due to their different inertia. Under the influence of inertia, the liquid is more likely to impact the partition wall 42 and accumulate, thereby improving the gas-liquid separation effect. At the same time, multiple partition walls 42 disperse the gas-liquid mixture into multiple separation channels 41, preventing the gas-liquid mixture from concentrating in a single area and improving the separation effect of the second separator 4 on the gas-liquid mixture.

[0054] It should be understood that the above-mentioned "non-linear extension" can be interpreted as the partition wall 42 not being straight from the inlet 11 to the outlet 12, but having a certain curvature angle in the direction from the inlet 11 to the outlet 12. For example, at least a part of the partition wall 42 may be in the shape of an arc, a circle, a parabola, or other curved shapes. Or, at least a part of the partition wall 42 may be formed by connecting multiple straight segments, forming a broken line structure similar to a Z-shape, V-shape, or step shape.

[0055] In some embodiments of this application, see Figure 1 , Figure 2 , Figure 6As shown, the second separator 4 also includes multiple blocking arms 43. One end of each blocking arm 43 is connected to the partition wall 42, and the other end extends toward the inlet 11. Specifically, the blocking arm 43's connection to the partition wall 42 and its extension toward the inlet 11 causes the gas-liquid mixture to be obstructed by the blocking arms 43 upon entering the separation channel 41, forcing it to change its flow direction and increasing the turbulence of the gas-liquid mixture within the separation channel 41. This turbulence facilitates further gas-liquid separation because the liquid is more easily separated from the gas under the influence of the turbulence and adheres to the partition wall 42 or the blocking arms 43.

[0056] In some embodiments of this application, see Figure 1 , Figure 2 , Figure 6 As shown, the outermost partition wall 42 has a gap between itself and the cavity wall of the receiving cavity. Specifically, the gap between the outermost partition wall 42 and the cavity wall allows the gas-liquid mixture from the inlet 11 to flow through this gap to the separation plate 22, achieving the same effect as the separation channel 41, thus realizing the separation of the gas-liquid mixture. Figure 6 In the example, both the topmost and bottommost partition walls 42 are located on the outermost side. A blocking arm 43 can also be provided on the outermost partition wall 42. The blocking arm 43 extends into the cavity wall of the receiving cavity. The blocking arm 43 can also disturb the gas-liquid mixture, which helps to further separate the gas and liquid.

[0057] In some embodiments, see Figure 1 , Figure 2 , Figure 6 As shown, the cavity wall of the receiving cavity has at least one blocking member 13. One end of the blocking member 13 is connected to the cavity wall of the receiving cavity, and the other end of the blocking member 13 extends towards the inlet 11. Specifically, the blocking member 13 on the cavity wall of the receiving cavity has a similar effect to the blocking arm 43, causing the gas-liquid mixture to be obstructed by the blocking member 13 when entering the gap between the outermost partition wall 42 and the cavity wall of the receiving cavity, forcing it to change its flow direction and further separating the gas-liquid mixture.

[0058] In some embodiments of this application, see Figures 1-2As shown, the cover 10 also includes a pressure relief valve 5, which is installed on the cover body 1 and located on the side of the separator 22 near the outlet 12. The pressure relief valve 5 is adapted to control the opening or closing of the outlet 12. Specifically, by controlling the opening or closing of the outlet 12, the pressure relief valve 5 can regulate the pressure within the receiving cavity of the cover 10, keeping the cover 10 within a stable operating range. This helps maintain the stability of the gas-liquid separation process and avoids a decrease in gas-liquid separation efficiency or malfunction of equipment (such as an engine) using the cover 10 due to pressure fluctuations.

[0059] In some embodiments of this application, see Figures 1-2 As shown, the cover 10 also includes a grid 3, which is connected to the cover body 1 and is located in the receiving cavity. The grid 3 is located on the side of the separation plate 22 in the receiving cavity facing the inlet 11. At least a part of the structure of the grid 3 is mesh-like, and the grid 3 performs gas-liquid separation on the gas-liquid mixture flowing through the grid 3.

[0060] Specifically, the grid 3 has a certain structure and pores. When the gas-liquid mixture flows through the grid 3, the liquid particles will collide and coalesce on the surface of the grid 3. Due to gravity, the liquid particles will adhere to the grid 3 and gradually accumulate, and may even drip off the grid 3, ultimately achieving gas-liquid separation. This improves the gas-liquid separation efficiency and effect of the entire cover 10 and reduces the liquid content in the gas discharged from the outlet 12.

[0061] The mesh structure has a dense grid that can effectively intercept solids or liquids in the gas-liquid mixture. This prevents solids or liquids from entering subsequent separation components or systems (such as the second separator 4, separation plate 22, etc.), thereby improving the separation effect of the gas-liquid mixture, protecting the components inside the cover 10 from wear, blockage and corrosion, and extending the service life of the cover 10.

[0062] In some embodiments, the cover 10 includes a cover body 1, a grid 3, a separation plate 22, and a first separation element 23. The gas-liquid mixture flows in from the inlet 11 and sequentially passes through the grid 3, the first hole 21, and the first separation element 23 before flowing out from the outlet 12. The gas-liquid mixture flowing in from the inlet 11 first passes through the grid 3, which provides preliminary treatment. On the one hand, the grid 3 can intercept larger solids or liquids in the gas-liquid mixture, preventing these solids or liquids from entering the separation plate 22 and avoiding blockage of the first hole 21 of the separation plate 22, thereby ensuring the normal operation of the separation plate 22 and extending its service life. On the other hand, the grid 3 can evenly disperse the gas-liquid mixture, allowing the gas and liquid to flow more evenly to the separation plate 22 and increasing the flow rate of the gas-liquid mixture within the first hole 21.

[0063] In some embodiments, the cover 10 includes a cover body 1, a grille 3, a second separator 4, a separator 22, and a first separator 23. The grille 3 is located on the side of the second separator 4 facing the inlet 11. The gas-liquid mixture flows in from the inlet 11 and flows through the grille 3, the second separator 4, the separator 22, and the first separator 23 in sequence before flowing out from the outlet 12.

[0064] In summary, please refer to Figure 2 As shown, the dashed line represents the flow path of the gas-liquid mixture within the containment cavity. The gas-liquid mixture flowing in from inlet 11 passes sequentially through grid 3, second separator 4, separator plate 22, and first separator 23. Through different separation methods, the gas and liquid in the gas-liquid mixture are separated. The separated gas is discharged through outlet 12, which improves the gas-liquid separation efficiency of cover 10, enhances the gas-liquid separation effect of cover 10, and reduces the liquid content in the gas discharged from outlet 12.

[0065] In some embodiments, see Figure 3 As shown, the cover 10 also includes a horizontal plate 24, which is connected to the cavity wall of the receiving cavity. The separation plate 22 is mounted on the horizontal plate 24, which is adapted to provide a mounting base for the separation plate 22, thereby improving the stability of the separation plate 22.

[0066] Optionally, the separation plate 22 can be installed on the horizontal plate 24 by welding, bolting, riveting, etc.

[0067] An engine according to another embodiment of this application includes a housing and the aforementioned cover 10. The housing has a working chamber, the cover 10 is disposed on the housing, the inlet 11 communicates with the working chamber, and the outlet 12 communicates with the external environment.

[0068] According to another embodiment of the engine of this application, the cover 10 gradually reduces the flow area of ​​the first hole 21 in the direction from the inlet 11 to the outlet 12, thereby increasing the flow velocity of the gas-liquid mixture flowing through the first hole 21, increasing the impact force of the gas-liquid mixture flowing out of the first hole 21 on the first separator 23, and making it easier for more liquid to be retained on the first separator 23, thereby improving the gas-liquid separation efficiency of the cover 10 for the gas-liquid mixture.

[0069] In some embodiments, an oil-gas separation module is arranged inside the accommodating cavity. The oil-gas separation module may include at least a fine separation module and a coarse separation module. The fine separation module may include a first separation component 2, namely a separation plate 22 and a first separation element 23, and the coarse separation module includes a second separation element 4.

[0070] Engines include crankcases. With increasingly stringent emission regulations and the application of new engine technologies leading to improved performance and efficiency, crankcase emissions have become a crucial factor to consider in current engine development and application. The first hole in the separator plate of the cover (specifically, the valve cover) is cylindrical. Exhaust gas enters the oil-gas separation module through the inlet inside the cover. The oil-gas separation module separates the crankcase exhaust gas, which then impacts the first separator through the first hole, achieving oil-gas separation. The first separator can be a fabric plate, and the separation medium can be fabric.

[0071] According to the engine of this application embodiment, by adding a grille 3 to the side of the oil-gas separation module of the cover 10 near the inlet 11, oil droplets in the exhaust gas are filtered out, and the shape of the first hole 21 is optimized into a conical hole, so that the flow velocity of the exhaust gas at the first hole 21 is increased, and it impacts the first separator 23 more quickly, so as to improve the oil-gas separation efficiency and reduce emissions.

[0072] In some embodiments, the cover 10 further includes at least one reflux channel (not shown in the figure), which connects the working chamber and the receiving chamber. The working chamber is located inside the crankcase. After the gas-liquid mixture is separated in the receiving chamber, the separated liquid flows into the working chamber through the reflux channel. Thus, the reflux channel enables the recycling of liquid.

[0073] In some embodiments, there are two return channels. One of the two return channels is located on the side of the separation plate 22 away from the inlet 11, which is suitable for allowing the liquid separated by the first separator 23 to flow into the working chamber. The other of the two return channels is located between the separation plate 22 and the second separator 4, which is suitable for allowing the liquid separated by the second separator 4 to flow into the working chamber.

[0074] The vehicle according to another aspect of this application includes the engine described above.

[0075] According to another aspect of the vehicle, the engine cover 10 gradually reduces the flow area of ​​the first hole 21 in the direction from the inlet 11 to the outlet 12, thereby increasing the flow velocity of the gas-liquid mixture flowing through the first hole 21, increasing the impact force of the gas-liquid mixture flowing out of the first hole 21 on the first separator 23, and making it easier for more liquid to be retained on the first separator 23, thereby improving the gas-liquid separation efficiency of the cover 10 for the gas-liquid mixture.

[0076] In the description of this application, it should be understood that the terms "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0077] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0078] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. In addition, those skilled in the art can combine and integrate the different embodiments or examples described in this specification.

[0079] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. A cover (10) characterized in that, include: Cover body (1), the cover body (1) has a receiving cavity, the receiving cavity has an inlet (11) and an outlet (12); A separation plate (22) and a first separation element (23) are installed in the receiving cavity. The separation plate (22) has at least one first hole (21). The inlet (11) and the outlet (12) are connected through the first hole (21). The flow area of ​​the first hole (21) gradually decreases in the direction from the inlet (11) to the outlet (12). The first separation element (23) is located on the side of the separation plate (22) facing the outlet (12). The first separation element (23) is adapted to separate the liquid in the gas-liquid mixture flowing through the first separation element (23).

2. The cover (10) according to claim 1, characterized in that The flow area of ​​the first orifice (21) decreases linearly in the direction from the inlet (11) to the outlet (12).

3. The cover (10) according to claim 1, characterized in that The first separating component (23) is connected to the separating plate (22).

4. A cover (10) according to claim 3, characterized in that The first separator (23) includes a separation medium for absorbing liquid in a gas-liquid mixture flowing through it.

5. A cover (10) according to claim 4, characterized in that The separation medium is a fabric.

6. The cover (10) according to claim 3, characterized in that The thickness of the separation plate (22) is 3 mm to 4 mm in the direction from the inlet (11) to the outlet (12).

7. The cover (10) according to claim 1, characterized in that The cover (10) also includes a pressure relief valve (5), which is installed on the cover body (1) and located on the side of the separation plate (22) near the outlet (12). The pressure relief valve (5) is adapted to control the opening or closing of the outlet (12).

8. A cover (10) according to any one of claims 1-7, characterized in that The cover (10) also includes a grid (3), which is connected to the cover body (1). The grid (3) is located on the side of the separation plate (22) in the receiving cavity facing the inlet (11). At least a part of the structure of the grid (3) is mesh-like. The grid (3) performs gas-liquid separation on the gas-liquid mixture flowing through the grid (3).

9. An engine characterized by, include: The housing has a working cavity inside; The cover (10) according to any one of claims 1-8, wherein the cover (10) covers the housing, the inlet (11) is connected to the working chamber, and the outlet (12) is connected to the external environment.

10. A vehicle characterized by comprising: Includes the engine as described in claim 9.

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