Oil-gas separator and engine

Abstract

The utility model discloses an oil-gas separator, and relates to the field of vehicle manufacturing, an oil-gas separation cavity is formed in the oil-gas separator, the oil-gas separator is provided with a gas taking port, and the gas taking port is used for communicating the oil-gas separation cavity with a crankcase; a large-load gas guide flow path is further formed in the oil-gas separator, one end of the large-load gas guide flow path communicates with the oil-gas separation cavity, a gas flow opening is formed in the other end of the large-load gas guide flow path, and the large-load gas guide flow path is arranged to be used for communicating the oil-gas separation cavity towards the gas flow opening. The airflow opening is suitable for being communicated with an air filter air inlet pipeline. According to the oil-gas separator, the large-load gas guide flow path is arranged in the oil-gas separator, so that the large-load pipeline and the oil-gas separator are integrated, an internal channel of the large-load pipeline is optimized, and the efficiency and the reliability of an engine system are improved.

Description

Technical Field

[0001] This utility model relates to the field of vehicle manufacturing technology, and in particular to an oil-gas separator and an engine having the oil-gas separator. Background Technology

[0002] During engine operation, an air-fuel mixture needs to be drawn in and compressed. This compressed mixture enters the crankcase, becoming blow-by gas. This blow-by gas carries oil vapor, thus requiring an oil-gas separator for separation. Related technologies use high-load pipelines connected to the oil-gas separator to separate oil vapor; however, the design of these high-load pipelines is constrained by the overall engine design and cannot be placed in the most optimal location. Utility Model Content

[0003] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes an oil-gas separator that can be integrated with high-load pipelines in a single design, optimizing the internal channels of the high-load pipelines and improving the efficiency and reliability of the engine system.

[0004] According to an embodiment of the present invention, an oil-gas separator is provided with an oil-gas separation chamber and an air intake port for connecting the oil-gas separation chamber to the crankcase. Furthermore, a high-load airflow path is also formed within the oil-gas separator. One end of the high-load airflow path is connected to the oil-gas separation chamber, and the other end forms an airflow port. The high-load airflow path is configured to guide the oil-gas separation chamber toward the airflow port, and the airflow port is adapted to connect to the air filter intake pipe.

[0005] According to the embodiment of the present invention, the oil-gas separator integrates the high-load pipeline with the oil-gas separator by setting the high-load airflow path inside the oil-gas separator. This optimizes the internal channel of the high-load pipeline, making the structure of the oil-gas separator more compact, the arrangement of the high-load pipeline more reasonable, and improving the efficiency and reliability of the engine system.

[0006] According to some embodiments of the present invention, the length direction of the high-load airflow path and the length direction of the oil-gas separation chamber are both along the first direction of the oil-gas separator, and the high-load airflow path and the oil-gas separation chamber are integrated and arranged in the second direction of the oil-gas separator, wherein the first direction intersects the second direction.

[0007] According to some embodiments of the present invention, in the oil-gas separator, the airflow direction in the high-load guiding airflow path is opposite to the airflow direction in the oil-gas separation chamber.

[0008] According to some embodiments of the present invention, the first direction of the oil-gas separator is along the length direction of the oil-gas separator, and the second direction is along the width direction of the oil-gas separator.

[0009] According to some embodiments of the present invention, the oil-gas separator includes a pressure-stabilizing cavity in the high-load airflow path, and the pressure-stabilizing cavity extends in an arc shape along the length of the high-load airflow path.

[0010] According to some embodiments of the present invention, the oil-gas separator has a height difference of L1 between the inner bottom wall and the inner top wall of the pressure stabilizing chamber, and a height difference of L2 between the inner bottom wall and the inner top wall of the oil-gas separation chamber, and satisfies: L1 / L2 < 1 / 2.

[0011] And / or, the cross-sectional area of ​​the high-load airflow path is S, and satisfies: S≥50mm 2 .

[0012] According to some embodiments of the present invention, the oil-gas separator has multiple pressure-stabilizing chambers, and the multiple pressure-stabilizing chambers are spaced apart along the length of the high-load airflow path.

[0013] And / or, the pressure stabilizing chamber is configured to protrude in an arc shape toward the direction of the oil-gas separation chamber.

[0014] According to some embodiments of the present invention, the oil-gas separator is provided with at least two filter elements in the oil-gas separation chamber, the high-load airflow path is connected to the oil-gas separation chamber through an intermediate port, and the at least two filter elements are distributed sequentially between the gas intake port and the intermediate port.

[0015] According to some embodiments of the present invention, the oil-gas separator is further provided with a low-load gas outlet, and the oil-gas separation chamber is configured to selectively connect with the low-load gas outlet and the high-load airflow path.

[0016] This utility model also proposes an engine.

[0017] The engine according to the present invention includes the oil-gas separator of any of the above embodiments.

[0018] The engine described above has the same advantages over existing technologies as the oil-gas separator mentioned above, and will not be repeated here.

[0019] Additional aspects and advantages of this invention 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 the invention. Attached Figure Description

[0020] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0021] Figure 1 This is a schematic diagram of the structure of the oil-gas separator according to an embodiment of the present invention;

[0022] Figure 2 yes Figure 1 Cross-sectional view at point AA.

[0023] Figure label:

[0024] Oil-gas separator 100,

[0025] Oil-gas separation chamber 1, filter element 11, air intake port 2, high-load airflow path 3, pressure stabilizing chamber 31, airflow port 4, intermediate port 5, low-load air outlet 6.

[0026] Cylinder head cover 200. Detailed Implementation

[0027] The embodiments of this utility model 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 are only used to explain this utility model, and should not be construed as limiting this utility model.

[0028] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," etc., indicating the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this utility model 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 utility model. Furthermore, features defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0029] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0030] The following is for reference. Figures 1-2 The oil-gas separator 100 according to an embodiment of the present invention integrates the high-load pipeline with the oil-gas separator 100 by setting the high-load airflow path 3 inside the oil-gas separator 100. This optimizes the internal passage of the high-load pipeline, making the structure of the oil-gas separator 100 more compact, the arrangement of the high-load pipeline more reasonable, and improving the efficiency and reliability of the engine system.

[0031] like Figure 1 As shown, according to an embodiment of the present invention, the oil-gas separator 100 can be installed on the cylinder head cover 200 of the engine so that the oil-gas separator 100 can be fixedly installed on the engine. The oil-gas separator 100 has an oil-gas separation chamber 1 formed inside, which can separate oil vapor from combustible gas in the crankcase, preventing oil from entering the combustion chamber, reducing oil consumption, and ensuring that the ventilation system maintains normal operation under different operating conditions.

[0032] Furthermore, the oil-gas separator 100 is provided with an air intake 2, which is used to connect the oil-gas separation chamber 1 to the crankcase. In this way, the mixed gas in the crankcase can enter the oil-gas separation chamber 1 through the air intake 2. The oil-gas separator 100 also has a high-load guiding airflow path 3 for gas circulation.

[0033] One end of the high-load guiding airflow path 3 is connected to the oil-gas separation chamber 1 and the other end forms an airflow port 4. The high-load guiding airflow path 3 is configured to guide the oil-gas separation chamber 1 toward the airflow port 4.

[0034] Therefore, the gas separated by the oil-gas separation chamber 1 can be discharged through the high-load guide airflow path 3 and the airflow port 4. The airflow port 4 is suitable for connecting with the air filter intake pipe. Thus, the mixed gas in the crankcase can enter the air filter intake pipe after being separated by the oil-gas separator 100.

[0035] In practical use, the air-fuel mixture in the crankcase enters the oil-gas separator 1 through the air intake 2. The oil-gas separator 1 separates the engine oil vapor from the combustible gas. The separated gas leaves the oil-gas separator 1 and enters the high-load airflow path 3, and is discharged from the airflow port 4 at the other end of the high-load airflow path 3 into the air filter intake pipe. It should be noted that the separated gas can be discharged to the outside atmosphere through the air filter intake pipe, or it can re-enter the crankcase through the air filter intake pipe to replenish the air in the crankcase and ensure a relative pressure balance within the crankcase.

[0036] Therefore, by setting the high-load airflow path 3 inside the oil-gas separator 100, it is not necessary to set a long pipeline structure on the outside of the oil-gas separator 100 as a high-load pipeline. This achieves the integration of the high-load pipeline with the oil-gas separator 100, reduces the restrictions of the engine's overall boundary on the layout of the high-load pipeline, shortens the length of the external pipeline of the oil-gas separator 100, and makes the structure of the oil-gas separator 100 more compact, thereby reducing the layout space it occupies and facilitating the rational design of the high-load pipeline layout scheme.

[0037] According to the embodiment of the present invention, the oil-gas separator 100 integrates the high-load pipeline with the oil-gas separator 100 by setting the high-load airflow path 3 inside the oil-gas separator 100. This optimizes the internal channel of the high-load pipeline, making the structure of the oil-gas separator 100 more compact, the arrangement of the high-load pipeline more reasonable, and improving the efficiency and reliability of the engine system.

[0038] In some embodiments, the length direction of the high-load airflow path 3 and the length direction of the oil-gas separation chamber 1 are both along the first direction of the oil-gas separator 100. Wherein, the length direction of the high-load airflow path 3 and the length direction of the oil-gas separation chamber 1 are both the direction of airflow movement; that is, in actual installation, the direction of airflow movement can be set as the first direction.

[0039] Furthermore, the high-load airflow path 3 and the oil-gas separation chamber 1 are integrated and arranged in the second direction of the oil-gas separator 100, wherein the first direction and the second direction intersect. That is to say, the integrated arrangement direction of the high-load airflow path 3 and the oil-gas separation chamber 1 forms a certain angle with the direction of airflow movement. The angle can be set to 30°, 60°, 90°, or other angles between 0° and 180°. The specific angle setting is flexibly selectable.

[0040] Specifically, such as Figure 2As shown, the angle between the integrated arrangement direction of the oil-gas separation chamber 1 and the high-load guiding flow path 3 and the direction of airflow movement is set to 90°. This makes the first direction and the second direction perpendicular, so that the length direction of the high-load guiding flow path 3 and the length direction of the oil-gas separation chamber 1 are both perpendicular to their arrangement direction. This achieves a compact integration of the high-load guiding flow path 3 and the oil-gas separation chamber 1. As a result, the space occupied by the oil-gas separator 100 and the high-load pipeline can be reduced during the arrangement, which is conducive to the rational design of the high-load pipeline arrangement scheme.

[0041] In some embodiments, the airflow direction in the high-load guiding airflow path 3 is opposite to the airflow direction in the oil-gas separation chamber 1. That is, the airflow direction in the high-load guiding airflow path 3 and the airflow direction in the oil-gas separation chamber 1 flow in opposite directions along the first direction, so that the side-by-side distribution of the high-load guiding airflow path 3 and the oil-gas separation chamber 1 is more compact.

[0042] Specifically, such as Figure 1 As shown, the high-load airflow path 3 and the oil-gas separation chamber 1 are constructed to be distributed along the vertical direction in the figure, and their length direction is along... Figure 1 The flow path is oriented left and right. The gas inlet 2 is located at the left end of the oil-gas separation chamber 1, and the gas outlet 4 is located at the left end of the high-load guiding gas path 3. The right end of the oil-gas separation chamber 1 is connected to the right end of the high-load guiding gas path 3, so that the gas in the oil-gas separation chamber 1 flows from left to right into the high-load guiding gas path 3, and then flows out from the high-load guiding gas path 3 from right to left. This allows the gas to have a larger flow path, which not only extends the gas flow path but also reduces the space occupied by the oil-gas separator 100 and the high-load pipeline, facilitating the rational design of the high-load pipeline layout.

[0043] In some embodiments, the first direction is along the length of the oil-gas separator 100, and the second direction is along the width of the oil-gas separator 100. That is, the first direction and the second direction are perpendicular to each other, i.e., the integrated arrangement direction of the oil-gas separation chamber 1 and the high-load airflow path 3 makes an angle of 90° with the flow direction of the airflow.

[0044] Specifically, such as Figure 1 As shown, the first direction is Figure 1 The left-right direction, i.e., the length direction of the oil-gas separator 100, allows both the oil-gas separation chamber 1 and the high-load guide flow path 3 to be constructed as elongated spaces, enabling a larger overall length for both. This increases the oil-gas separation stroke, enhances the separation effect, and ensures that the gas temperature is not excessively high after exiting the high-load guide flow path 3, resulting in a more moderate temperature and preventing excessive heat radiation to other external structures. Furthermore, in the second direction... Figure 1The vertical direction, i.e. the width direction of the oil-gas separator 100, minimizes the space occupied by the integrated layout of the oil-gas separation chamber 1 and the high-load airflow path 3. As a result, both the oil-gas separation chamber 1 and the high-load airflow path 3 can have a large internal flow path and can be integrated in a compact manner, which is conducive to the rational design of the high-load pipeline layout scheme.

[0045] In some embodiments, the high-load airflow path 3 includes a pressure-stabilizing cavity 31. By providing the pressure-stabilizing cavity 31, the airflow in the high-load airflow path 3 can be made to run stably. The pressure-stabilizing cavity 31 extends in an arc shape along the length of the high-load airflow path 3. By setting the shape of the pressure-stabilizing cavity 31 to be arc-shaped, the airflow can reduce its flow velocity and change its flow direction when passing through the arc-shaped flow path.

[0046] Specifically, such as Figure 1 As shown, in the high-load airflow path 3, a portion of the flow section extends in an arc shape to form a pressure stabilizing chamber 31. When the airflow passes through the pressure stabilizing chamber 31, its flow direction intersects with the length direction of the high-load airflow path 3. As a result, the flow velocity of the airflow is reduced, thereby avoiding rapid gas discharge that could cause airflow fluctuations, which in turn could lead to an increase in pressure inside the crankcase, and also avoid lubrication and abnormal noise problems caused by excessive pressure fluctuations in the engine system.

[0047] Among them, such as Figure 1 As shown, the cross-sectional area of ​​the upstream flow path of the pressure stabilizing chamber 31 is larger than that of the pressure stabilizing chamber 31. Therefore, more gas can be stored in the upstream flow path of the pressure stabilizing chamber 31, which is beneficial for the gas to be discharged from the oil-gas separation chamber 1.

[0048] In some embodiments, the height difference between the inner bottom wall and the inner top wall of the pressure stabilizing chamber 31 is L1, and the height difference between the inner bottom wall and the inner top wall of the oil-gas separation chamber 1 is L2, satisfying that L1 / L2 < 1 / 2. For example, L1 / L2 can be set to 1 / 3, 1 / 4, 1 / 5, or other proportional relationships within the above range.

[0049] In other words, the height difference of the inner wall of the oil-gas separation chamber 1 is more than twice or more than the height difference of the inner wall of the pressure stabilizing chamber 31. This can better ensure the pressure distribution inside the oil-gas separator 100, thereby ensuring the stability of the gas-mixture separation process and effectively preventing the separated oil droplets from re-entering the gas flow area, thus avoiding secondary pollution of the gas.

[0050] In other embodiments, the cross-sectional area of ​​the high-load airflow path 3 is S, and satisfies: S≥50mm 2 For example, the cross-sectional area of ​​the high-load airflow path 3 can be set to 50mm. 2 53mm 2 54mm 2 55mm2 57mm 2 58mm 2 62mm 2 63mm 2 Or it can be any other value within the above range. Therefore, when the airflow passes through the high-load guide airflow path 3, the separated gas can be quickly discharged from the airflow port 4, thereby reducing the gas flow resistance and effectively ensuring the efficiency of the oil-gas separator 100.

[0051] In some embodiments, there are multiple pressure stabilizing chambers 31, that is, the pressure stabilizing chambers 31 can be set to two, three or more. Multiple pressure stabilizing chambers 31 can effectively reduce the gas flow rate, thereby reducing the airflow fluctuation caused by the rapid discharge of gas from the air outlet 4, and avoiding the problem of excessive pressure rise in the crankcase caused by excessive gas flow rate, as well as the lubrication and abnormal noise problems caused by excessive pressure fluctuation in the engine system. In other words, multiple pressure stabilizing chambers 31 are set, which enhances the pressure stabilization effect.

[0052] Furthermore, multiple pressure-stabilizing chambers 31 are spaced apart along the length of the high-load airflow path 3. Thus, the multiple pressure-stabilizing chambers 31 can sequentially stabilize the gas in the high-load airflow path 3, thereby effectively reducing the gas flow velocity and avoiding problems such as poor flow path and gas blockage caused by the continuous arrangement of pressure-stabilizing chambers 31.

[0053] In other embodiments, the pressure stabilizing cavity 31 is configured to protrude in an arc shape toward the direction of the oil-gas separation cavity 1, specifically, as shown in... Figure 1 As shown, a portion of the flow section of the high-load airflow path 3 extends upward in an arc shape to form a pressure stabilizing cavity 31. As a result, the flow velocity of the gas decreases when it flows through the pressure stabilizing cavity 31, thereby reducing airflow fluctuations and preventing excessive crankcase pressure.

[0054] By setting the pressure stabilizing chamber 31 to protrude toward the oil-gas separation chamber 1, the arrangement of the high-load airflow path 3 at the pressure stabilizing chamber 31 and the oil-gas separation chamber 1 can be more compact, achieving a combination of space utilization and helping to reduce the overall size of the engine.

[0055] In some embodiments, the oil-gas separation chamber 1 is provided with at least two filter elements 11, that is, the filter elements 11 can be two, three or more. Multiple filter elements 11 can effectively filter the mixture and fully separate oil vapor and combustible gas. The high-load airflow path 3 is connected to the oil-gas separation chamber 1 through the intermediate port 5. At least two filter elements 11 are distributed sequentially between the gas intake port 2 and the intermediate port 5. That is to say, after the gas is fully filtered by multiple filter elements 11 in sequence in the oil-gas separation chamber 1, it enters the high-load airflow path 3 through the intermediate port 5.

[0056] Specifically, such as Figure 1As shown, the gas mixture passes through two filters 11 in sequence in the oil-gas separation chamber 1, so that the oil vapor and combustible gas are filtered and separated. The separated gas enters the high-load guide flow path 3 under the oil-gas separation chamber 1 through the middle port 5. One filter 11 can be set as a coarse separation structure and the other filter 11 can be set as a fine separation structure. The coarse separation structure performs the first separation of the gas mixture and can separate the large oil droplets in the gas. The fine separation structure performs the second separation of the gas mixture and can separate the remaining oil droplets in the gas. Thus, the oil droplets in the gas mixture are fully filtered by the filter 11.

[0057] In some embodiments, the oil-gas separator 100 is further provided with a low-load outlet 6, and the oil-gas separation chamber 1 is configured to selectively connect with the low-load outlet 6 and the high-load airflow path 3. That is, the gas in the oil-gas separation chamber 1 can enter the low-load outlet 6, or enter the high-load airflow path 3 through the intermediate port 5. In actual operation, when the engine is under low load, the mixture in the oil-gas separation chamber 1 is filtered by the filter element 11 and enters the cylinder head intake manifold through the low-load outlet 6, thereby entering the cylinder to participate in combustion. When the engine is under high load, the filtered and separated gas enters the high-load airflow path 3 through the intermediate port 5, thereby entering the air filter intake pipe. After mixing with fresh air, it enters the cylinder through the engine intake system to participate in combustion.

[0058] This utility model also proposes an engine.

[0059] The engine according to an embodiment of the present invention includes an oil-gas separator 100 as described in any of the above embodiments. The engine includes a cylinder head cover 200, and the oil-gas separator 100 is mounted on the cylinder head cover 200. By placing the high-load airflow path 3 within the oil-gas separator 100, the high-load pipeline and the oil-gas separator 100 are integrated into a single design, thereby optimizing the internal passage of the high-load pipeline, making the structure of the oil-gas separator 100 more compact, the arrangement of the high-load pipeline more reasonable, and improving the efficiency and reliability of the engine system.

[0060] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "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 the present invention. 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.

[0061] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. An oil-gas separator, characterized in that, The oil-gas separator has an oil-gas separation chamber (1) inside, and the oil-gas separator is provided with an air intake (2), which is used to connect the oil-gas separation chamber (1) to the crankcase. The oil-gas separator also has a high-load airflow path (3), one end of which is connected to the oil-gas separation chamber (1) and the other end is formed with an airflow port (4). The high-load airflow path (3) is configured to guide the oil-gas separation chamber (1) toward the airflow port (4). The airflow port (4) is adapted to be connected to the air filter inlet pipe.

2. The oil-gas separator according to claim 1, characterized in that, The length direction of the high-load airflow path (3) and the length direction of the oil-gas separation chamber (1) are both along the first direction of the oil-gas separator, and the high-load airflow path (3) and the oil-gas separation chamber (1) are integrated and arranged in the second direction of the oil-gas separator, with the first direction intersecting the second direction.

3. The oil-gas separator according to claim 2, characterized in that, The airflow direction in the high-load airflow path (3) is opposite to the airflow direction in the oil-gas separation chamber (1).

4. The oil-gas separator according to claim 2, characterized in that, The first direction is along the length of the oil-gas separator, and the second direction is along the width of the oil-gas separator.

5. The oil-gas separator according to claim 1, characterized in that, The high-load airflow path (3) includes a pressure stabilizing cavity (31), which extends in an arc shape along the length of the high-load airflow path (3).

6. The oil-gas separator according to claim 5, characterized in that, The height difference between the inner bottom wall and the inner top wall of the pressure stabilizing chamber (31) is L1, and the height difference between the inner bottom wall and the inner top wall of the oil-gas separation chamber (1) is L2, and satisfies: L1 / L2 < 1 / 2. And / or, the cross-sectional area of ​​the high-load airflow path (3) is S, and satisfies: S≥50mm 2 .

7. The oil-gas separator according to claim 5, characterized in that, There are multiple pressure stabilizing cavities (31), and the multiple pressure stabilizing cavities (31) are spaced apart in the length direction of the high-load airflow path (3); And / or, the pressure stabilizing chamber (31) is configured to protrude in an arc shape toward the direction of the oil-gas separation chamber (1).

8. The oil-gas separator according to claim 1, characterized in that, The oil-gas separation chamber (1) is provided with at least two filter elements (11), and the high-load airflow path (3) is connected to the oil-gas separation chamber (1) through the intermediate port (5). At least two filter elements (11) are distributed sequentially between the gas intake port (2) and the intermediate port (5).

9. The oil-gas separator according to claim 1, characterized in that, The oil-gas separator is also provided with a low-load gas outlet (6), and the oil-gas separation chamber (1) is configured to be selectively connected to the low-load gas outlet (6) and the high-load airflow path (3).

10. An engine, characterized in that, The oil-gas separator includes any one of claims 1-9.

Images