Oil and gas separator, crankcase ventilation system, and vehicle
By designing an oil-gas separator with an integrated labyrinth channel, the problems of high installation space and cost in crankcase ventilation systems were solved, achieving efficient oil-gas separation and gas replenishment under different load conditions, and reducing the risk of oil leakage and insufficient gas replenishment.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- NINGBO GEELY ROYAL ENGINE COMPONENTS CO LTD
- Filing Date
- 2025-09-03
- Publication Date
- 2026-07-21
AI Technical Summary
The existing crankcase ventilation system requires a large installation space and high cost to install two oil-gas separators, and it is difficult to effectively separate oil and gas and replenish gas under different load conditions.
Design an oil-gas separator that uses a shell and an oil-gas separation component. The shell is provided with a receiving cavity, a first oil-gas inlet, a second oil-gas inlet, a high-load interface and a low-load interface. A labyrinth channel is opened on the oil-gas separation component to realize independent oil-gas separation and gas replenishment control.
It achieves oil-gas separation and gas replenishment under different load conditions, saving installation space and costs, and reducing the risk of crankcase oil leakage and insufficient gas replenishment.
Smart Images
Figure CN224532801U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of engine component technology, specifically to an oil-gas separator, a crankcase ventilation system, and a vehicle. Background Technology
[0002] With increasingly stringent emission regulations placing ever higher demands on the performance of automobile crankcase ventilation systems, the design and performance research of oil-gas separators are of paramount importance, as their impact on the stability and safety of engine operation is growing.
[0003] Current crankcase ventilation systems typically include two labyrinth-type oil-gas separators: a high-load oil-gas separator and a low-load oil-gas separator. These separators are used to separate oil and gas and provide air supply when the engine is under high and low load conditions, respectively. However, installing two oil-gas separators requires a large installation space and the cost of the components is relatively high. Utility Model Content
[0004] In view of the above, it is necessary to propose an oil-gas separator, crankcase ventilation system and vehicle to save installation space and cost.
[0005] In a first aspect, embodiments of this application provide an oil-gas separator, including a housing and an oil-gas separator component. The housing has a receiving cavity, and the oil-gas separator component is connected to the inner wall of the receiving cavity and extends along the extending direction of the housing. The oil-gas separator component has a labyrinth channel penetrating both ends of the oil-gas separator component, with an inlet and an outlet at each end of the labyrinth channel. The housing also has a first oil-gas inlet and a second oil-gas inlet, a high-load interface, and a low-load interface, all of which are respectively connected to the receiving cavity. The first oil-gas inlet and the second oil-gas inlet are located on the same side of the oil-gas separator component. The first oil-gas inlet is connected to the inlet, and the second oil-gas inlet is located on the side of the outlet. The high-load interface and the low-load interface are located at the end of the housing near the inlet and on the side of the oil-gas separator component opposite to the first oil-gas inlet.
[0006] In some embodiments, the housing includes a first housing and a second housing connected together, the first housing and the second housing enclosing the receiving cavity; the oil-gas separator is connected to the side of the first housing facing the second housing, the first oil-gas inlet and the second oil-gas inlet are both opened on the side of the first housing away from the second housing, and the high-load interface and the low-load interface are both opened on the side of the second housing away from the first housing.
[0007] In some embodiments, the angle between the extension direction of the high-load interface and the side of the second housing opposite to the first housing is less than or equal to 90 degrees; and / or, the extension direction of the low-load interface is parallel to the side of the second housing opposite to the first housing.
[0008] In some embodiments, the oil-gas separator further includes a first inlet plate, which is disposed at the first oil-gas inlet and connected to the housing, and the angle between the extending direction of the first inlet plate and the width direction of the oil-gas separator is an acute angle.
[0009] In some embodiments, the oil-gas separator further includes a second inlet plate and an oil baffle plate. The second inlet plate is disposed at the second oil-gas inlet and connected to the housing. The angle between the extension direction of the second inlet plate and the width direction of the oil-gas separator is an acute angle. The oil baffle plate is disposed on the side of the second oil-gas inlet facing the receiving cavity and connected to the housing. The oil baffle plate is disposed opposite to the second inlet plate. The angle between the extension direction of the oil baffle plate and the width direction of the oil-gas separator is an acute angle.
[0010] In some embodiments, the cross-sectional dimensions of the maze passage near the exit gradually decrease along the direction from the entrance to the exit.
[0011] In some embodiments, the outer casing is further provided with an oil return port communicating with the receiving cavity. The oil return port is located on one side of the second oil and gas inlet and corresponds to the outlet. The oil and gas separator further includes an oil collecting component. The oil collecting component is connected to the outer side wall of the outer casing and covers the oil return port. The side of the oil collecting component facing the oil return port is provided with an oil collecting groove communicating with the oil return port. The side of the oil collecting component away from the oil return port is provided with an oil outlet communicating with the oil collecting groove. The oil outlet and the oil return port are offset.
[0012] In some embodiments, the oil-gas separator further includes a control valve disposed at the low-load port; the control valve includes a valve body, a retaining ring, a plunger, a first elastic element, and a second elastic element. The valve body is inserted into and protrudes from the low-load port. The valve body has a flow channel extending through both ends of the valve body. The flow channel includes a first section and a second section. The first section is located on the side of the second section facing the low-load port. The diameter of the first section is larger than the diameter of the second section. The retaining ring is disposed at the end of the first section away from the second section. The plunger is movably disposed in the first section and extends into the second section. The first elastic element is sleeved on the plunger, and both ends of the first elastic element are respectively connected to the end of the plunger away from the second section and the inner wall of the first section near the second section. The second elastic element is disposed at the end of the second section away from the first section.
[0013] The oil-gas separator of this embodiment features a housing and an oil-gas separation component. The housing includes a receiving cavity, a first oil-gas inlet, a second oil-gas inlet, a high-load interface, and a low-load interface. The oil-gas separation component has a labyrinthine channel. When the engine is under high load, the first and second oil-gas inlets simultaneously guide the gas discharged from the crankcase into the oil-gas separator, effectively preventing excessive pressure in the crankcase. Furthermore, when the engine is under low load, the separated gas is discharged from the low-load interface, and when the engine is under high load, the separated gas is discharged from the high-load interface. Thus, this embodiment requires only one oil-gas separator to perform oil-gas separation and gas replenishment under both high and low load engine conditions. The separator is also compact and small in size, saving installation space and cost. Furthermore, since the first oil and gas inlet, the second oil and gas inlet, the high-load interface, and the low-load interface are set independently, it is convenient to control and adjust the outlet air flow and the replenishment air flow separately, thereby reducing the probability of problems such as oil leakage and insufficient replenishment air in the crankcase.
[0014] Secondly, embodiments of this application also provide a crankcase ventilation system, including the oil-gas separator as described in the above embodiments.
[0015] The crankcase ventilation system of this application embodiment saves installation space and cost by setting the above-mentioned oil-gas separator, and reduces the probability of problems such as oil leakage and insufficient air supply in the crankcase.
[0016] Thirdly, this application also provides a vehicle including the crankcase ventilation system as described in the above embodiments.
[0017] This application also provides a vehicle including the crankcase ventilation system as described in the above embodiments. Attached Figure Description
[0018] Figure 1 This is a top view of the oil-gas separator provided in the embodiments of this application.
[0019] Figure 2 yes Figure 1 The image shows a bottom view of the oil-gas separator.
[0020] Figure 3 yes Figure 1 The diagram shows a cross-sectional view of the oil-gas separator along the III-III direction.
[0021] Figure 4 yes Figure 2 The diagram shows a cross-sectional view of the oil-gas separator along the IV-IV direction.
[0022] Figure 5 yes Figure 2 The diagram shows a cross-sectional view of the oil-gas separator along the V-V direction.
[0023] Figure 6 yes Figure 2 The diagram shows a cross-sectional view of the oil-gas separator along the VI-VI direction.
[0024] Figure 7 yes Figure 6 An enlarged schematic diagram of region A in the middle.
[0025] Figure 8 yes Figure 2 The diagram shows a cross-sectional view of the oil-gas separator along the VIII-VIII direction.
[0026] Figure 9 This is a schematic diagram of the hardware architecture of the crankcase ventilation system provided in the embodiments of this application.
[0027] Key component symbols: Crankcase ventilation system 100, oil-gas separator 1, outer casing 10, first housing 11, first oil-gas inlet 111, second oil-gas inlet 112, oil return port 113, second housing 12, high load interface 121, low load interface 122, protrusion 123, receiving cavity 13, oil-gas separator 20, labyrinth channel 21, inlet 211, outlet 212, top wall 213, first guide plate 30, second guide plate 40, oil baffle 50, oil collector 60, oil collection trough 61, oil outlet 62, control valve 70, valve body 71, flow... Passage 711, first section 7111, second section 7112, retaining ring 72, plunger 73, first elastic element 74, second elastic element 75, combustion chamber 801, crankcase 802, intake manifold 803, throttle valve 804, air filter 805, turbocharger 806, high-load check valve 807, intercooler 808, air injection check valve 809, exhaust pipe 810, oil return pipe 811, high-load pipe 812, low-load pipe 813, main air injection pipe 814, auxiliary air injection pipe 815, first air delivery pipe 816, second air delivery pipe 817. 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 are only used to explain this application, and should not be construed as limiting this application.
[0029] In the description of this application, it should be understood that the terms indicating orientation or positional relationship are 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. Furthermore, 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 the stated features. In the description of this application, it should be noted that "a plurality of" means two or more, unless otherwise explicitly specified.
[0030] In the description of this application, it should be noted that, unless otherwise explicitly specified and limited, the term "connection" should be interpreted broadly. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or a connection that allows communication between the two components; it can be a direct connection or an indirect connection through an intermediate medium; it can be 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.
[0031] The following will describe some embodiments of this application in detail with reference to the accompanying drawings.
[0032] Please see Figure 1 and Figure 8 This application provides an oil-gas separator 1, which is applied to a crankcase ventilation system 100. The crankcase ventilation system 100 can be applied to vehicles such as hybrid vehicles and gasoline vehicles; however, this is not a limitation of this application.
[0033] Please see Figure 1 , Figure 2 and Figure 3 In this embodiment, the oil-gas separator 1 includes a housing 10 and an oil-gas separator 20. The housing 10 has a receiving cavity 13. The oil-gas separator 20 is connected to the inner wall of the receiving cavity 13 and extends along the extending direction of the housing 10. The oil-gas separator 20 has a labyrinth channel 21 that passes through both ends of the oil-gas separator 20. The two ends of the labyrinth channel 21 have an inlet 211 and an outlet 212, respectively. The outer casing 10 is also provided with a first oil and gas inlet 111 and a second oil and gas inlet 112, a high-load interface 121 and a low-load interface 122 respectively connected to the receiving cavity 13. The first oil and gas inlet 111 and the second oil and gas inlet 112 are located on the same side of the oil and gas separator 20. The first oil and gas inlet 111 is connected to the inlet 211, and the second oil and gas inlet 112 is located on the side of the outlet 212. The high-load interface 121 and the low-load interface 122 are opened at the end of the outer casing 10 near the inlet 211 and are located on the side of the oil and gas separator 20 away from the first oil and gas inlet 111.
[0034] Specifically, the first oil-gas inlet 111 and the second oil-gas inlet 112 are arranged according to the oil-gas distribution of the engine (not shown). The first oil-gas inlet 111 is located in the area with a higher oil-gas concentration, and the longer labyrinth channel 21 allows for more thorough oil-gas separation, reducing the probability of oil burning problems. The second oil-gas inlet 112 is located in the area with a lower oil-gas concentration. When the engine is running under heavy load, the piston leakage is large. The first oil-gas inlet 111 and the second oil-gas inlet 112 can simultaneously guide the gas discharged from the crankcase 802 into the oil-gas separator 1, thereby effectively preventing the crankcase 802 from becoming too pressurized. In addition, when the engine is running under light load, the gas separated by the oil-gas separator 1 is discharged from the light load port 122, and when the engine is running under heavy load, the gas separated by the oil-gas separator 1 is discharged from the heavy load port 121. Thus, only one oil-gas separator 1 is needed in this embodiment of the application to perform oil-gas separation and gas replenishment when the engine is under high load and low load conditions respectively. Moreover, the oil-gas separator 1 has a compact structure and small size, thereby saving installation space and cost.
[0035] In this embodiment, the outer casing 10 includes a first casing 11 and a second casing 12 connected to each other, and the first casing 11 and the second casing 12 enclose a receiving cavity 13. The oil-gas separator 20 is connected to the side of the first casing 11 facing the second casing 12. The first oil-gas inlet 111 and the second oil-gas inlet 112 are both opened on the side of the first casing 11 away from the second casing 12. The high-load interface 121 and the low-load interface 122 are both opened on the side of the second casing 12 away from the first casing 11.
[0036] By providing the outer casing 10 with a first casing 11 and a second casing 12 connected to each other, it is convenient to install the oil-gas separator 20 in the receiving cavity 13.
[0037] In this embodiment, the side of the second housing 12 facing away from the first housing 11 is planar, and the angle between the extension direction of the high-load interface 121 and the side of the second housing 12 facing away from the first housing 11 is less than or equal to 90 degrees. This facilitates the connection of the pipeline to the high-load interface 121 and allows for further separation of oil and gas under gravity when passing through the high-load interface 121, thereby improving the oil-gas separation effect of the oil-gas separator 1.
[0038] In this embodiment, a protrusion 123 is provided at one end of the second housing 12 near the inlet 211, and the protrusion 123 is located on the side of the second housing 12 opposite to the first housing 11. A portion of the high-load interface 121 is formed in the protrusion 123, and the high-load interface 121 extends along the extending direction of the protrusion 123. By providing the protrusion 123, the convenience of connecting the high-load interface 121 to the pipeline is further improved.
[0039] In this embodiment, the oil-gas separator 1 further includes a control valve 70, which is located at the low-load interface 122. The extension direction of the low-load interface 122 is parallel to the side of the second housing 12 that is away from the first housing 11. This arrangement can effectively prevent the components inside the control valve 70 from affecting the control accuracy of the control valve 70 due to gravity.
[0040] Please refer to the following: Figure 4 In this embodiment, the oil-gas separator 1 further includes a first inlet plate 30, which is disposed at the first oil-gas inlet 111 and connected to the outer casing 10. The angle between the extending direction of the first inlet plate 30 and the width direction of the oil-gas separator 20 is an acute angle. The width direction of the oil-gas separator 20 is F1, which is perpendicular to its extending direction. The extending direction of the first inlet plate 30 is F2.
[0041] When oil and gas enter inlet 211 through first oil and gas inlet 111, the oil and gas form vortex gas under the action of first guide plate 30, thereby increasing the contact area between oil and gas and labyrinth channel 21, and thus improving the oil and gas separation effect of labyrinth channel 21.
[0042] In this embodiment, the angle between the extension direction F2 of the first guide plate 30 and the width direction F1 of the oil-gas separator 20 is α, and the value of α ranges from 20 degrees to 30 degrees. Within this range, the formation of vortex gas by oil and gas under the action of the first guide plate 30 is more obvious, thereby improving the oil-gas separation effect of the labyrinth channel 21.
[0043] In one embodiment, the value of 'a' can be 22 degrees. When 'a' is this value, the formation of vortex gas under the action of the first inlet plate 30 is more obvious, thereby improving the oil-gas separation effect of the labyrinth channel 21. In other embodiments, the value of 'a' can also be 20 degrees, 21 degrees, 23 degrees, 24 degrees, 25 degrees, 26 degrees, 27 degrees, 28 degrees, 29 degrees, or 30 degrees. This application does not specifically limit this value.
[0044] In this embodiment, the first guide plate 30 and the first housing 11 are an integral structure. In some other embodiments, the first guide plate 30 may also be mounted on the first housing 11 by bolts or other connecting parts, and this application does not specifically limit this.
[0045] Please refer to the following: Figure 5In this embodiment, the oil-gas separator 1 further includes a second inlet plate 40 and an oil baffle plate 50. The second inlet plate 40 is disposed at the second oil-gas inlet 112 and connected to the outer casing 10. The angle between the extending direction of the second inlet plate 40 and the width direction of the oil-gas separator 20 is an acute angle. The oil baffle plate 50 is disposed on the side of the second oil-gas inlet 112 facing the receiving cavity 13 and connected to the outer casing 10. The oil baffle plate 50 is disposed opposite to the second inlet plate 40. The angle between the extending direction of the oil baffle plate 50 and the width direction of the oil-gas separator 20 is an acute angle. Specifically, the extending direction of the second inlet plate 40 is F3, and the extending direction of the oil baffle plate 50 is F4.
[0046] When oil and gas enter the receiving chamber 13 through the second oil and gas inlet 112, the oil and gas form a vortex under the action of the second guide plate 40. The vortex impacts the oil baffle plate 50, thereby achieving oil and gas separation. The separated engine oil flows back to the oil pan (not shown) and then back to the crankcase 802. Thus, by setting the second guide plate 40 and the oil baffle plate 50, the oil and gas separation effect of the oil and gas separator 1 is improved.
[0047] In this embodiment, a portion of the engine oil formed after oil-gas separation in the labyrinth channel 21 can also flow back to the oil pan through the first oil-gas inlet 111, and then back to the crankcase 802.
[0048] In this embodiment, the angle between the extension direction F3 of the second guide plate 40 and the width direction F1 of the oil-gas separator 20 is b, and the value of b ranges from 30 degrees to 40 degrees. Within this range, the oil and gas form a more pronounced vortex gas under the action of the second guide plate 40, thereby improving the oil-gas separation effect of the oil baffle 50.
[0049] In one embodiment, the value of b can be 32 degrees. When b is this value, the formation of vortex gas under the action of the second inlet plate 40 is more obvious, thereby improving the oil-gas separation effect of the baffle plate 50. In other embodiments, the value of b can also be 30 degrees, 31 degrees, 33 degrees, 34 degrees, 35 degrees, 36 degrees, 37 degrees, 38 degrees, 39 degrees, or 40 degrees. This application does not specifically limit this value.
[0050] In this embodiment, the angle between the extension direction F4 of the oil baffle 50 and the width direction F1 of the oil-gas separator 20 is c, and the value of c ranges from 30 degrees to 40 degrees. Within this range, the oil-gas separation effect of the oil baffle 50 is better, and the flow rate of oil and gas through the second oil-gas inlet 112 can be guaranteed.
[0051] In one embodiment, the value of c can be 34.5 degrees. When c is this value, the oil-gas separation effect of the baffle plate 50 is better. In other embodiments, the value of c can also be 30 degrees, 31 degrees, 32 degrees, 33 degrees, 34 degrees, 35 degrees, 36 degrees, 37 degrees, 38 degrees, 39 degrees, or 40 degrees. This application does not specifically limit the value of c.
[0052] In this embodiment, the oil baffle 50 and the first housing 11 are an integral structure. In some other embodiments, the oil baffle 50 may also be installed on the first housing 11 by bolts or other connecting parts, and this application does not specifically limit this.
[0053] Please refer to the reference again. Figure 3 In this embodiment, the cross-sectional dimension of the end of the labyrinth channel 21 near the outlet 212 gradually decreases along the direction from the inlet 211 to the outlet 212. This increases the contact time between the oil and gas and the inner wall of the labyrinth channel 21, and also increases the impact force of the oil and gas on the inner wall at the outlet 212 when passing through it, thereby improving the oil and gas separation effect of the labyrinth channel 21.
[0054] In this embodiment, the oil-gas separator 20 has an opening on the side facing the first oil-gas inlet 111, and the labyrinth channel 21 is formed by the inner wall of the oil-gas separator 20 and the receiving cavity 13. This helps to reduce the weight and cost of the oil-gas separator 20.
[0055] In some other embodiments, the maze passages 21 may also be entirely located on the oil-gas separator 20, and this application does not specifically limit this.
[0056] In this embodiment, the inner wall of the maze channel 21 away from the first oil and gas inlet 111 is the top wall 213. The part of the top wall 213 near the outlet 212 is inclined toward the outlet 212, so that the cross-sectional dimension of the end of the maze channel 21 near the outlet 212 gradually decreases along the direction from the inlet 211 to the outlet 212. The structure is simple and the oil and gas separation effect of the maze channel 21 is improved.
[0057] Please refer to the following: Figure 6 and Figure 7 In this embodiment, the outer casing 10 also has an oil return port 113 communicating with the receiving cavity 13. The oil return port 113 is located on the first casing 11, on one side of the second oil and gas inlet 112 and corresponding to the outlet 212. The oil and gas separator 1 also includes an oil collecting component 60, which is connected to the outer wall of the outer casing 10 and covers the oil return port 113. The oil collecting component 60 has an oil collecting groove 61 communicating with the oil return port 113 on the side facing the oil return port 113, and an oil outlet hole 62 communicating with the oil collecting groove 61 on the side of the oil collecting component 60 away from the oil return port 113. The oil outlet hole 62 and the oil return port 113 are staggered.
[0058] Specifically, some of the oil formed after oil-gas separation in the labyrinth channel 21 and some of the oil formed after oil-gas separation in the oil baffle 50 enter the oil collection tank 61 through the oil return port 113 for collection, and then are discharged into the crankcase 802 through the oil outlet port 62. Thus, by setting the oil return port 113 and the oil collection component 60, the oil recovery effect of the oil-gas separator 1 is improved. Furthermore, by staggering the oil outlet port 62 and the oil return port 113, it is possible to ensure smooth oil return through the oil outlet port 62, and to reduce the probability of oil vapor entering the receiving chamber 13 through the oil outlet port 62 and the oil return port 113.
[0059] Please refer to the following: Figure 8 In this embodiment, the second inlet plate 40 and the oil collecting component 60 are an integral structure. In some other embodiments, the second inlet plate 40 may also be an integral structure with the first housing 11, or the second inlet plate 40 may be installed on the first housing 11 by bolts or other connecting parts. This application does not specifically limit this aspect.
[0060] In this embodiment, the control valve 70 includes a valve body 71, a retaining ring 72, a plunger 73, a first elastic element 74, and a second elastic element 75. The valve body 71 is inserted into and protrudes from the low-load interface 122. The valve body 71 has a flow channel 711 extending through both ends of the valve body 71. The flow channel 711 includes a first section 7111 and a second section 7112. The first section 7111 is located on the side of the second section 7112 facing the low-load interface 122. The diameter of the first section 7111 is... The diameter of the first segment 7111 is larger than that of the second segment 7112. A retaining ring 72 is located at the end of the first segment 7111 furthest from the second segment 7112. A plunger 73 is movably located in the first segment 7111 and extends into the second segment 7112. A first elastic element 74 is sleeved on the plunger 73, with its two ends connected to the end of the plunger 73 furthest from the second segment 7112 and the inner wall of the first segment 7111 near the second segment 7112, respectively. A second elastic element 75 is located at the end of the second segment 7112 furthest from the first segment 7111. Both the first elastic element 74 and the second elastic element 75 can be springs.
[0061] Specifically, the plunger 73 withstands the pressure difference across the low-load interface 122, thereby overcoming the elastic force of the first elastic element 74 to move axially, adjusting the gap between the plunger 73 and the retaining ring 72, the inner walls of the first section 7111 and the second section 7112, thus controlling the flow rate through the flow channel 711 under a certain pressure, and thereby regulating the pressure of the crankcase 802. In the initial state or when the engine intake manifold 803 is under positive pressure, the first elastic element 74 of the plunger 73 is pressed against the retaining ring 72, and the control valve 70 is closed one way. When the engine is under low load and the relative vacuum is low, the plunger 73 compresses the first elastic element 74 under negative pressure, the plunger 73 is in the middle position and does not contact the second elastic element 75, and there is a gap between the plunger 73 and the retaining ring 72. When the engine is idling and the relative vacuum is relatively high, the plunger 73 moves further towards the second stage 7112, and the second elastic element 75 presses against the plunger 73 to prevent the valve core from swinging, further increasing the gap between the plunger 73 and the retaining ring 72. Thus, by setting the control valve 70, it is convenient to adjust the pressure in the crankcase 802 when the engine is under low load conditions, and convenient to unidirectionally cut off when the engine is under high load conditions.
[0062] In summary, the oil-gas separator 1 of this embodiment, by providing a housing 10 and an oil-gas separator 20, and by creating a receiving cavity 13, a first oil-gas inlet 111, a second oil-gas inlet 112, a high-load interface 121, and a low-load interface 122 on the housing 10, and a labyrinth channel 21 on the oil-gas separator 20, allows the first oil-gas inlet 111 and the second oil-gas inlet 112 to simultaneously guide the gas discharged from the crankcase 802 into the oil-gas separator 1 when the engine is under high load, thereby effectively preventing excessive pressure in the crankcase 802. Furthermore, when the engine is under low load, the gas separated by the oil-gas separator 1 is discharged from the low-load interface 122, and when the engine is under high load, the gas separated by the oil-gas separator 1 is discharged from the high-load interface 121. Thus, only one oil-gas separator 1 is needed in this embodiment to perform oil-gas separation and gas replenishment when the engine is under high load and low load conditions, and the oil-gas separator 1 has a compact structure and small size, thereby saving installation space and cost. Furthermore, since the first oil and gas inlet 111, the second oil and gas inlet 112, the high-load interface 121, and the low-load interface 122 are independently set, it is convenient to control and adjust the outlet air flow and the replenishment air flow separately, thereby reducing the probability of problems such as oil leakage and insufficient replenishment air in the crankcase 802.
[0063] Please refer to the following: Figure 9 This application also provides a crankcase ventilation system 100, including the oil-gas separator 1 as described in the above embodiments.
[0064] The crankcase ventilation system 100 of this application embodiment saves installation space and cost by setting the oil-gas separator 1, and reduces the probability of problems such as oil leakage and insufficient air supply in the crankcase 802.
[0065] In this embodiment, the crankcase ventilation system 100 further includes a combustion chamber 801, a crankcase 802, an intake manifold 803, a throttle valve 804, an air filter 805, a turbocharger 806, a high-load check valve 807, an intercooler 808, a supplementary air check valve 809, an exhaust pipe 810, an oil return pipe 811, a high-load pipe 812, a low-load pipe 813, a main supplementary air pipe 814, a secondary supplementary air pipe 815, a first air supply pipe 816, and a second air supply pipe 817. Combustion chamber 801 is connected to crankcase 802, intake manifold 803, and turbocharger 806 respectively. Exhaust pipe 810 is connected to crankcase 802 and oil separator 1 at both ends, specifically to the first oil-gas inlet 111 and the second oil-gas inlet 112 of oil separator 1. Return oil pipe 811 is connected to crankcase 802 and oil separator 1 at both ends, specifically to the oil pan of oil separator 1. Low-load pipe 813 is connected to control valve 70 and intake manifold 803 at both ends, and high-load pipe 812 is connected to high-load... Interface 121 is connected to the high-load check valve 807. The two ends of the main air supply line 814 are connected to the air filter 805 and the turbocharger 806, respectively. The high-load check valve 807 is installed on the main air supply line 814. The air supply check valve 809 is connected to the crankcase 802. The two ends of the auxiliary air supply line 815 are connected to the main air supply line 814 and the air supply check valve 809, respectively. The two ends of the first air supply line 816 are connected to the turbocharger 806 and the intercooler 808, respectively. The throttle valve 804 is connected to the intake manifold 803. The two ends of the second air supply line 817 are connected to the intercooler 808 and the throttle valve 804, respectively.
[0066] When the crankcase ventilation system 100 is working, the oil and gas in the crankcase 802 enter the oil and gas separator 1 through the first oil and gas inlet 111 and the second oil and gas inlet 112. The oil and gas separator 1 separates the oil and gas through the labyrinth channel 21. Then, depending on the engine operating conditions: under low load: the intake manifold 803 pressure is negative; the separated gas passes through the control valve 70 and the low load pipeline 813 into the intake manifold 803 to participate in combustion in the combustion chamber 801. At this time, the high load one-way valve 807 is closed to prevent excessive intake of air-filtered gas into the intake manifold 803, thus preventing crankcase pressure and torque fluctuations. Under high load: the intake manifold 803 pressure is positive; the turbocharger 806 starts working; the separated gas passes through... The gas enters the turbocharger 806 through the overload pipeline 812, the overload one-way valve 807 and the main air supply pipeline 814, and then enters the intake manifold 803 through the first air supply pipeline 816, the intercooler 808, the second air supply pipeline 817 and the throttle valve 804 to participate in combustion in the combustion chamber 801. At this time, the low load control valve 70 is closed one way to prevent the gas in the intake manifold 803 from being forced into the crankcase 802, which would cause the pressure in the crankcase 802 to rise and fail to meet the emission regulations. Furthermore, under different engine operating conditions, depending on the pressure in the crankcase 802, the air filtered by the air filter 805 passes through the main air supply line 814, the auxiliary air supply line 815, and the air supply check valve 809 to replenish fresh air into the crankcase 802. Through the scavenging action, the oil and gas in the crankcase 802 are promptly forced into the oil-gas separator 1 for oil-gas separation. The high-load check valve 807 forward-directs the gas in the oil-gas separator 1 to the main air supply line 814, and reverses it to cut off. The air supply check valve 809 forward-directs the air filtered by the air to the crankcase 802, and reverses it to cut off.
[0067] This application also provides a vehicle (not shown) including a crankcase ventilation system 100 as described in the above embodiments.
[0068] The vehicle in this embodiment of the application saves installation space and cost by setting up a crankcase ventilation system 100 including the above-mentioned oil-gas separator 1, and reduces the probability of problems such as oil leakage and insufficient air supply in the crankcase 802.
[0069] It will be apparent to those skilled in the art that this application is not limited to the details of the exemplary embodiments described above, and that this application can be implemented in other specific forms without departing from the spirit or essential characteristics of this application. Therefore, the embodiments should be regarded in all respects as exemplary and not restrictive, and the scope of this application is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be embraced within this application.
[0070] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application and are not intended to limit it. Although this application has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this application without departing from the spirit and scope of the technical solutions of this application.
Claims
1. An oil-gas separator, characterized in that, The device includes a housing and an oil-gas separator. The housing has a receiving cavity. The oil-gas separator is connected to the inner wall of the receiving cavity and extends along the extension direction of the housing. The oil-gas separator has a labyrinthine channel penetrating both ends of the oil-gas separator. The two ends of the labyrinthine channel have an inlet and an outlet, respectively. The housing also has a first oil-gas inlet and a second oil-gas inlet, a high-load interface, and a low-load interface, which are respectively connected to the receiving cavity. The first oil-gas inlet and the second oil-gas inlet are located on the same side of the oil-gas separator. The first oil-gas inlet is connected to the inlet. The second oil-gas inlet is located on the side of the outlet. The high-load interface and the low-load interface are opened at the end of the housing near the inlet and on the side of the oil-gas separator opposite to the first oil-gas inlet.
2. The oil-gas separator as described in claim 1, characterized in that, The outer casing includes a first casing and a second casing connected to each other, which together form the receiving cavity; the oil-gas separator is connected to the side of the first casing facing the second casing, the first oil-gas inlet and the second oil-gas inlet are both located on the side of the first casing away from the second casing, and the high-load interface and the low-load interface are both located on the side of the second casing away from the first casing.
3. The oil-gas separator as described in claim 2, characterized in that, The angle between the extension direction of the high-load interface and the side of the second housing opposite to the first housing is less than or equal to 90 degrees; and / or, The extension direction of the low-load interface is parallel to the side of the second housing that is away from the first housing.
4. The oil-gas separator as described in claim 1, characterized in that, The oil-gas separator further includes a first inlet plate, which is disposed at the first oil-gas inlet and connected to the outer casing. The angle between the extension direction of the first inlet plate and the width direction of the oil-gas separator is an acute angle.
5. The oil-gas separator as described in claim 1, characterized in that, The oil-gas separator further includes a second inlet plate and an oil baffle plate. The second inlet plate is disposed at the second oil-gas inlet and connected to the outer casing. The angle between the extension direction of the second inlet plate and the width direction of the oil-gas separator is an acute angle. The oil baffle is located on the side of the second oil and gas inlet facing the receiving cavity and is connected to the outer shell. The oil baffle is disposed opposite to the second inlet plate, and the angle between the extension direction of the oil baffle and the width direction of the oil and gas separator is an acute angle.
6. The oil-gas separator as described in claim 1, characterized in that, The cross-sectional dimensions of the maze passage near the exit gradually decrease along the direction from the entrance to the exit.
7. The oil-gas separator as described in claim 1, characterized in that, The outer casing also has an oil return port that communicates with the receiving cavity. The oil return port is located on one side of the second oil and gas inlet and corresponds to the outlet. The oil and gas separator also includes an oil collecting component. The oil collecting component is connected to the outer wall of the outer casing and covers the oil return port. The side of the oil collecting component facing the oil return port has an oil collecting groove that communicates with the oil return port. The side of the oil collecting component away from the oil return port has an oil outlet that communicates with the oil collecting groove. The oil outlet and the oil return port are offset.
8. The oil-gas separator as described in claim 1, characterized in that, The oil-gas separator also includes a control valve located at the low-load interface. The control valve includes a valve body, a retaining ring, a plunger, a first elastic element, and a second elastic element. The valve body is inserted into and protrudes from the low-load interface. The valve body has a flow channel extending through both ends of the valve body. The flow channel includes a first section and a second section. The first section is located on the side of the second section facing the low-load interface, and the diameter of the first section is larger than the diameter of the second section. The retaining ring is located at the end of the first section away from the second section. The plunger is movably located in the first section and extends into the second section. The first elastic element is sleeved on the plunger, and both ends of the first elastic element are respectively connected to the end of the plunger away from the second section and the inner wall of the first section near the second section. The second elastic element is located at the end of the second section away from the first section.
9. A crankcase ventilation system, characterized in that, Includes the oil-gas separator as described in any one of claims 1 to 8.
10. A vehicle, characterized in that, Includes the crankcase ventilation system as described in claim 9.