An automotive oil-air separator

Abstract

This utility model provides an automotive oil-gas separator, relating to the field of automotive oil-gas separation technology. The separator includes a separator housing and a top cover that are snapped together. Its internal chambers are divided into a coarse separation chamber and a fine separation chamber, separated by a partition with oil-gas holes. The coarse separation chamber has multiple oil impact channels formed by protruding ribs to achieve initial oil-gas separation. The fine separation chamber is equipped with a rotating fine separation component that separates small-diameter oil droplets through centrifugal force. The outer wall of the separator housing has a blow-by channel and an exhaust pipe. The coarse separation chamber has a coarse oil return hole, and the fine separation chamber has a fine oil return hole with a one-way valve; both are connected to the engine oil return channel to achieve the circulation and return of the separated oil. This utility model, through multi-stage separation and an automatic oil return mechanism, significantly improves the efficiency and reliability of oil-gas separation, adapts to different operating conditions, and also has energy-saving and environmental protection effects.

Description

Technical Field

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

[0002] Automotive oil-gas separators typically consist of a plastic shell, a filter element made of oleophilic material, and oil-absorbing cotton or sponge. Located near the engine, they are connected to the crankcase via pipes. Oil-gas separators primarily utilize the dual principles of centrifugal force and filtration to separate oil and gas. When gas containing oil droplets enters the separator, the change in airflow causes the oil droplets to separate from the gas due to inertia, accumulating at the bottom of the container. The gas continues to rise, passing through the top filter layer for further removal of tiny oil droplets and impurities. Finally, the separated gas is discharged, while the liquid is recycled and reused.

[0003] With increasingly stringent national fuel consumption and emission regulations, small-displacement, high-torque turbocharged direct-injection engines are gaining more and more attention from major OEMs (Original Equipment Manufacturers) both domestically and internationally. Due to the small engine displacement, the space available for the oil-gas separator is limited, while the increased torque leads to greater engine leakage and places more stringent demands on the turbocharger's performance. Therefore, higher requirements are placed on the separation efficiency of the oil-gas separator. How to effectively integrate the oil-gas separator and improve its separation efficiency has become an increasingly important issue. Utility Model Content

[0004] The purpose of this invention is to provide an automotive oil-gas separator to solve the technical problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: An automotive oil-gas separator includes a separator housing and a top cover, which are fastened together to form a single unit. The separator housing is internally divided into a coarse separation chamber and a fine separation chamber, separated by a partition with oil-gas holes. The coarse separation chamber contains multiple protruding ribs arranged side-by-side to form multiple oil impact channels. A rotating fine separation component is installed in the fine separation chamber, which uses centrifugal force generated by rotation to separate medium- and small-diameter oil droplets from the oil-gas mixture. The outer wall of the separator housing is provided with a blow-by passage and an exhaust pipe. The blow-by passage is connected to the engine crankcase ventilation system to guide oil and gas into the interior of the separator housing. The exhaust pipe is located on the outer wall of the separator housing and communicates with the interior of the fine separation chamber through an outlet passage. The coarse separation chamber has a coarse oil return hole, which is located in the sedimentation chamber formed near the side wall of the separator housing. The fine separation chamber has a fine oil return hole, and a one-way valve is installed at the fine oil return hole. Both the fine oil return hole and the coarse oil return hole are connected to the engine oil return passage, which is used to discharge the separated oil into the engine oil return passage.

[0006] Based on the above technical solutions, this utility model also provides the following optional technical solutions: In one alternative: the rib structure is fishbone shaped and has at least five ribs; the bottom of the coarse separation cavity is inclined, and its height gradually decreases from the partition section to the coarse oil return hole.

[0007] In one alternative: the rotating precision separation component includes at least two tapered cylindrical tubes, the side of the tapered cylindrical tubes near the top opening being connected to an oil and gas hole through a cavity.

[0008] In one alternative: a valve mounting platform is provided at the connection between the fine separation chamber and the air outlet channel, and a pressure regulating valve is installed on the valve mounting platform. The pressure regulating valve includes a valve cover, a diaphragm and a spring. The valve cover is installed on the upper cover body by a buckle on the outer wall and covers the valve mounting platform. The spring is movably disposed inside the valve cover and is connected to the valve mounting platform by a diaphragm.

[0009] In one alternative: the separator housing has multiple housing through holes along its edge, the housing through holes have an undercut structure inside, the housing through holes and bolts are interference fit, and the bolts have bosses.

[0010] By adopting the above technical solution, this utility model has the following beneficial effects: This invention achieves a multi-stage oil-gas separation process from coarse to fine separation through the coordinated design of a coarse separation chamber and a fine separation chamber. In the coarse separation stage, an impact channel is formed by a rib structure, effectively separating large-diameter oil droplets. In the fine separation stage, centrifugal force generated by a rotating component separates small- and medium-diameter oil droplets, significantly improving the thoroughness and efficiency of oil-gas separation. Both the coarse return oil port and the fine return oil port with a one-way valve are connected to the engine's return oil channel, enabling automatic return and recycling of the separated oil. The one-way valve opens when the engine is under low load or stopped, effectively preventing backflow and ensuring stable system operation. The rotating fine separation component can automatically adjust its speed according to the oil-gas flow rate to adapt to different operating conditions. The design of the deposition chamber and rib structure enhances the oil droplet aggregation and guiding capabilities, improving the system's adaptability under varying operating conditions and its long-term reliability. Through efficient separation and oil recycling, oil consumption and pollutant emissions are reduced, meeting energy conservation and environmental protection requirements and contributing to increasingly stringent automotive emission standards. Attached Figure Description

[0011] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0012] Figure 1 This is a schematic diagram of the automotive oil-gas separator from one perspective of the present invention.

[0013] Figure 2 This is a schematic diagram of the automotive oil-gas separator from another perspective.

[0014] Figure 3 This is a schematic diagram of the separator housing from one perspective in one embodiment of the present invention.

[0015] Figure 4 This is a schematic diagram of the separator housing from another perspective in one embodiment of the present invention.

[0016] Figure 5 This is a schematic diagram of the upper cover structure in one embodiment of the present invention.

[0017] Figure 6 This is a schematic diagram of the pressure regulating valve structure in one embodiment of the present invention.

[0018] Figure reference numerals: Separator housing 100, coarse separation chamber 110, coarse oil return hole 111, rib structure 112, fine separation chamber 120, fine oil return hole 130, valve mounting platform 140, housing through hole 150, upper cover 200, pressure regulating valve 300, valve cover part 310, diaphragm 320, spring part 330, gas leakage passage 400, exhaust pipe 500, air outlet passage 510, rotating fine separation component 600, one-way valve 700, partition part 800, oil and gas hole 810. Detailed Implementation

[0019] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0020] The left, right, up, and down positions of the various components shown in the attached diagram are just one arrangement method; the specific positions should be set according to specific needs.

[0021] In one embodiment, such as Figures 1-4 As shown, an automotive oil-gas separator includes a separator housing 100 and an upper cover 200, which are fastened together to form a single unit. The separator housing 100 has internal chambers divided into a coarse separation chamber 110 and a fine separation chamber 120, separated by a partition 800 with oil-gas holes 810. The coarse separation chamber 110 has multiple protruding rib structures 112 arranged side-by-side to form multiple oil impact channels. The fine separation chamber 120 is equipped with a rotating fine separation component 600, which can separate medium- and small-diameter oil droplets from the oil-gas mixture using centrifugal force generated by rotation. The outer wall of the separator housing 100 is provided with a blow-by passage 400 and an exhaust pipe 500. The blow-by passage 400 is connected to the engine crankcase ventilation system to guide oil and gas into the interior of the separator housing 100. The exhaust pipe 500 is located on the outer wall of the separator housing 100 and communicates with the interior of the fine separation chamber 120 through an exhaust passage 510. The coarse separation chamber 110 has a coarse oil return hole 111 inside. The coarse oil return hole 111 is located in the sedimentation cavity formed near the side wall of the separator housing 100. The fine separation chamber 120 is provided with a fine oil return hole 130 and a one-way valve 700 is installed at the fine oil return hole 130. Both the fine oil return hole 130 and the coarse oil return hole 111 are connected to the engine oil return passage, which is used to discharge the separated oil into the engine oil return passage.

[0022] In this embodiment of the invention, oil and gas enter the coarse separation chamber 110 through the gas leakage channel 400. Under pressure, they accelerate and flow into the oil droplet impact channel formed by multiple protruding rib structures 112, causing large oil droplets carrying gas to impact the ribs, thus achieving coarse separation of oil and gas and oil droplets. The oil and gas enter the fine separation chamber 120 through the oil and gas hole 810, while the oil droplets flow back along the side wall of the protruding rib structure 112 and fall into the deposition chamber. Finally, they are discharged into the engine oil return channel through the coarse return oil hole 111 to achieve cyclic separation. The oil and gas entering the oil and gas hole 810 enter the area where the rotating fine separation component 600 is located, and the rotation... The rotary fine separation component 600 separates medium and small diameter oil droplets from the oil and gas through centrifugal force generated by rotation. The separated oil droplets flow into the fine return oil hole 130 for storage. Under low engine load or shutdown conditions, the one-way valve 700 opens and guides the stored oil droplets into the engine return oil passage for circulation separation. The oil and gas after fine separation flows along the exhaust passage 510 to the exhaust pipe 500 and is discharged through the exhaust pipe 500. The entire oil and gas separation process involves multi-stage separation and guides the separated oil droplets back into the engine return oil passage, thereby achieving circulation separation and improving separation effect and efficiency.

[0023] In one embodiment, such as Figures 1-4 As shown, the protruding rib structure 112 is fishbone shaped and has at least five of them. The bottom of the coarse separation chamber 110 is inclined, and its height gradually decreases from the partition part 800 to the coarse oil return hole 111. In this embodiment of the present invention, the sidewall of the fishbone shaped protruding rib structure 112 is distributed with protrusions. The protrusions collide with the oil droplets, which can effectively disperse the oil droplets and realize the separation of oil and gas and oil droplets. The oil droplets flow downward along the sidewall of the protruding rib structure 112, settle to the bottom of the coarse separation chamber 110 and flow to the coarse oil return hole 111 along the inclined direction.

[0024] In one embodiment, such as Figures 1-4 As shown, the rotating precision separation component 600 includes at least two conical cylindrical tubes. The side of the conical cylindrical tubes near the top opening is connected to the oil and gas hole 810 through a cavity. In this embodiment of the present invention, the conical cylindrical tube with a smaller diameter can reduce the pressure on the oil and gas. The increased flow rate of the oil and gas and the decrease in pressure will cause the gas in the oil droplets to be rapidly released and expanded. The gas rotates under pressure. The centrifugal force generated in the conical cylindrical tube is used to separate the neutralized small-diameter oil droplets in the oil and gas.

[0025] In one embodiment, such as Figures 1-4As shown, a valve mounting platform 140 is provided at the connection between the fine separation chamber 120 and the outlet channel 510, and a pressure regulating valve 300 is installed on the valve mounting platform 140. The pressure regulating valve 300 includes a valve cover 310, a diaphragm 320, and a spring 330. The valve cover 310 is installed on the upper cover 200 by a snap fastener on the outer wall and covers the valve mounting platform 140. The spring 330 is movably disposed inside the valve cover 310, and the spring 330 is connected to the valve mounting platform 140 by the diaphragm 320. In this embodiment of the present invention, the diaphragm opening is adjusted according to the crankcase pressure and the intake pressure to control the crankcase pressure within a set range. The separated gas will enter the outlet channel 510 after being controlled by the pressure control valve, and finally be introduced into the intake system through the exhaust pipe 500 to participate in combustion.

[0026] In one embodiment, such as Figures 1-6 As shown, the separator housing 100 has multiple housing through holes 150 along its edge. The housing through holes 150 have an undercut structure inside. The housing through holes 150 and the bolts are fitted with an interference fit. The bolts have bosses. In this embodiment of the present invention, during installation, the bolts are pressed into the housing through holes 150. After the bosses on the bolts are pressed in, the undercut structure can firmly lock the bolts and prevent them from accidentally coming out.

[0027] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the 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 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, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

Claims

1. An automotive oil-gas separator, comprising a separator housing and an upper cover, wherein the separator housing and the upper cover are fastened together to form a single unit; characterized in that, The separator housing is divided into a coarse separation chamber and a fine separation chamber, which are separated by a partition with oil and gas holes. The coarse separation chamber has multiple rib structures arranged side by side to form multiple oil impact channels. The fine separation chamber is equipped with a rotating fine separation component, which can separate small and medium-sized oil droplets from the oil and gas through the centrifugal force generated by rotation. The outer wall of the separator housing is provided with a blow-by passage and an exhaust pipe. The blow-by passage is connected to the engine crankcase ventilation system to guide oil and gas into the interior of the separator housing. The exhaust pipe is located on the outer wall of the separator housing and communicates with the interior of the fine separation chamber through an outlet passage. The coarse separation chamber has a coarse oil return hole, which is located in the sedimentation chamber formed near the side wall of the separator housing. The fine separation chamber has a fine oil return hole, and a one-way valve is installed at the fine oil return hole. Both the fine oil return hole and the coarse oil return hole are connected to the engine oil return passage, which is used to discharge the separated oil into the engine oil return passage.

2. The automotive oil-gas separator according to claim 1, characterized in that, The protruding rib structure is fishbone shaped and has at least five ribs. The bottom of the coarse separation cavity is inclined, and its height gradually decreases from the partition part to the coarse oil return hole.

3. The automotive oil-gas separator according to claim 1, characterized in that, The rotating precision separation component includes at least two conical cylindrical tubes, the side of which near the top opening is connected to the oil and gas hole through a cavity.

4. The automotive oil-gas separator according to claim 3, characterized in that, A valve mounting platform is provided at the connection between the fine separation chamber and the air outlet channel, and a pressure regulating valve is installed on the valve mounting platform. The pressure regulating valve includes a valve cover, a diaphragm and a spring. The valve cover is installed on the upper cover body by a buckle on the outer wall and covers the valve mounting platform. The spring is movably disposed inside the valve cover and is connected to the valve mounting platform by a diaphragm.

5. The automotive oil-gas separator according to claim 1, characterized in that, The separator housing has multiple housing through holes along its edge. The housing through holes have an undercut structure inside. The housing through holes and bolts are fitted with an interference fit. The bolts have bosses.

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