Pre-filtering device, oil-gas separator and engine

Abstract

The utility model discloses a pre-filtering device, an oil-gas separator and an engine, the pre-filtering device comprises a shell, a pre-filtering structure and a water removal structure, the pre-filtering structure is used for separating oil in waste gas, and the water removal structure is used for removing water in the waste gas. The pre-filtering device disclosed by the scheme is integrated with the water removal structure and is used for removing water from the waste gas before entering the oil-gas separator and reducing moisture in the waste gas, so that moisture entering the oil-gas separator along with the waste gas is reduced, the risk that engine oil is emulsified in the oil-gas separator is reduced, corrosion of the oil-gas separator caused by engine oil emulsification is reduced, and the service life of the oil-gas separator is prolonged. And the effect of prolonging the service life of the oil-gas separator is achieved.

Description

Technical Field

[0001] The present application relates to the field of engine technology, and in particular to a pre-filter device, an oil-gas separator and an engine. Background Technology

[0002] Methanol is one of the alternative petroleum fuels. It has a high oxygen content, can improve combustion thermal efficiency, and significantly reduce CO, HC and solid suspended particles in automobile exhaust. Methanol gasoline is of great significance in automobile energy conservation and emission reduction.

[0003] Because methanol is a highly polar substance, compared to gasoline, methanol gasoline has a stronger water absorption capacity, resulting in a high risk of oil emulsification. Engine oil emulsification will aggravate the rust of the oil-gas separator and affect the service life of the oil-gas separator.

[0004] Therefore, how to reduce the impact of oil emulsification on the service life of the oil-gas separator has become a technical problem that needs to be solved urgently by those skilled in the art. Contents of utility model

[0005] This application proposes a pre-filter device to reduce the impact of oil emulsification on the service life of the oil-gas separator. This application also proposes an oil-gas separator and an engine.

[0006] In order to achieve the above purpose, the present application provides a pre-filter device, including a housing, a pre-filter structure and a water removal structure,

[0007] The housing has an inlet and an outlet,

[0008] The pre-filter structure and the water removal structure are arranged in the housing and between the inlet and the outlet. The pre-filter structure is used to remove oil from the exhaust gas, and the water removal structure is used to remove moisture from the exhaust gas.

[0009] Preferably, in the above-mentioned pre-filter device, the water removal structure is a filter element, the filter element is filled in the housing, and the filter element is used to absorb moisture in the exhaust gas.

[0010] Preferably, in the above-mentioned pre-filter device, the filter element comprises at least one of activated carbon and silica gel.

[0011] Preferably, in the above-mentioned pre-filter device, a partition is provided in the shell to separate the inner cavity of the shell into a pre-filter cavity and a dewatering cavity, the pre-filter structure is provided in the pre-filter cavity, the dewatering structure is provided in the dewatering cavity, and a connecting port for connecting the pre-filter cavity and the dewatering cavity is provided on the partition.

[0012] Preferably, in the above-mentioned pre-filter device, a drain valve is further included and disposed in the water removal chamber. The drain valve is communicatively connected to the ECU to control the drain valve to open when the engine is in a shutdown condition; and / or,

[0013] A heater is further included and disposed outside the water removal chamber for heating the water removal chamber to accelerate the volatilization of moisture in the water removal structure.

[0014] The water removal chamber is provided with a pressure relief valve for relieving pressure on the water removal chamber to reduce the internal pressure of the water removal chamber.

[0015] Preferably, in the above-mentioned pre-filter device, the pre-filter structure has a plurality of baffles arranged in a labyrinth pattern;

[0016] Or, the pre-filter structure has baffles arranged in a spiral pattern;

[0017] Or, the pre-filter structure has a plurality of baffles arranged in parallel and inclined with respect to the air flow direction;

[0018] Or, the pre-filter structure has a plurality of parallel V-shaped baffles.

[0019] Preferably, in the above-mentioned pre-filter device, the pre-filter structure is located upstream of the water removal structure.

[0020] Preferably, in the above-mentioned pre-filter device, the pre-filter structure and the housing are made of the same material.

[0021] An oil-gas separator includes an oil-gas separator body and a pre-filter device, and the pre-filter device is the pre-filter device described in the above solution.

[0022] An engine includes an oil-gas separator, and the oil-gas separator is the oil-gas separator described in the above solution.

[0023] The pre-filter device provided by the embodiment of the present application includes a housing, a pre-filter structure, and a water removal structure. The pre-filter structure is used for separating oil in the exhaust gas, and the water removal structure is used for removing moisture in the exhaust gas. The pre-filter device disclosed in this solution is integrated with a water removal structure for removing water from the exhaust gas before entering the oil-gas separator, reducing the moisture in the exhaust gas, and further reducing the moisture entering the oil-gas separator with the exhaust gas, reducing the risk of emulsification of the engine oil in the oil-gas separator, and further reducing the rust of the oil-gas separator caused by the emulsification of the engine oil, achieving the effect of extending the service life of the oil-gas separator.

[0024] The present application also discloses an oil-gas separator, including an oil-gas separator body and a pre-filter device, and the pre-filter device is the pre-filter device described in any of the above solutions. Since the pre-filter device has the above technical effects, the oil-gas separator having the pre-filter device also has the same technical effects, which will not be elaborated here.

[0025] The present application also discloses an engine, which has an oil-gas separator, and the oil-gas separator is the oil-gas separator described in the above solution. Since the oil-gas separator has the above technical effects, the engine with this oil-gas separator also has the same technical effects, which will not be elaborated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some examples or embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained according to the provided drawings, and the present application can also be applied to other similar scenarios according to the provided drawings. Unless obvious from the language context or otherwise stated, the same reference numerals in the drawings represent the same structure or operation.

[0027] Figure 1 It is a schematic structural diagram of the oil-gas separator of the present application.

[0028] The brief description of the drawings is as follows:

[0029] 1 - pre-filter structure; 2 - water removal structure; 21 - drain valve; 3 - oil-gas separator body; 4 - heater; 5 - housing; 51 - partition board. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0030] The following will further elaborate on the present application in combination with the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the relevant application, rather than limiting the application. The described embodiments are only a part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present application.

[0031] It should be noted that for the convenience of description, only the parts related to the relevant application are shown in the drawings. Without conflict, the embodiments in the present application and the features in the embodiments can be combined arbitrarily, as long as the combined technical features are not mutually contradictory. All feasible feature combinations are the technical contents clearly recorded herein. Any one of the multiple sub-features included in the same sentence can be applied independently without necessarily being applied together with other sub-features.

[0032] As shown in this application and the claims, unless the context clearly indicates otherwise, words such as "a", "an", "one", and / or "the" are not specifically singular and may also include the plural. Generally speaking, the terms "comprising" and "including" only indicate the inclusion of the clearly identified steps and elements, and these steps and elements do not constitute an exclusive list. A method or device may also include other steps or elements. An element defined by the statement "comprising one..." does not exclude the existence of other identical elements in the process, method, commodity, or device that includes the element.

[0033] Among them, in the description of the embodiments of this application, unless otherwise specified, " / " means "or". For example, A / B can mean A or B; "and / or" herein is merely a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can mean: A exists alone, A and B exist simultaneously, and B exists alone. In addition, in the description of the embodiments of this application, "a plurality" means two or more than two.

[0034] The oil-gas separator is an important part of the engine's crankcase ventilation system. Its main function is to separate the oil contained in the engine blow-by gas. The oil separated by the oil-gas separator flows back to the oil pan through the oil return passage, and the separated gas is re-introduced into the engine intake system, finally entering the intake manifold and then the combustion chamber to be burned.

[0035] Please refer to Figure 1 。

[0036] Some embodiments of this application disclose a pre-filter device, including a housing 5, a pre-filter structure 1, and a water removal structure 2. The pre-filter structure 1 is used to separate the oil in the exhaust gas, and the water removal structure 2 is used to remove the moisture in the exhaust gas.

[0037] The housing 5 has an inlet and an outlet. The pre-filter structure 1 and the water removal structure 2 are located inside the housing 5 and between the inlet and the outlet.

[0038] When the pre-filter structure 1 is applied to the engine system, the inlet of the housing 5 is connected to the outlet of the crankcase, and the outlet of the housing 5 is connected to the inlet of the oil-gas separator.

[0039] The pre-filter device disclosed in this solution is integrated with a water removal structure 2, which is used to remove the water in the exhaust gas before entering the oil-gas separator, reduce the moisture in the exhaust gas, and thus reduce the moisture entering the oil-gas separator with the exhaust gas, reduce the risk of emulsification of the oil in the oil-gas separator, and further reduce the rust of the oil-gas separator caused by oil emulsification, achieving the effect of extending the service life of the oil-gas separator.

[0040] The pre-filter device disclosed in this solution combines the pre-filter structure 1 with the water removal structure 2, enabling the pre-filter structure 1 to simultaneously remove oil and water, aiming to reduce the oil and water entering the oil-gas separator, and ensuring the pre-filter effect of the engine oil while reducing the emulsification risk. The pre-filtered engine oil flows back to the oil pan through the oil drain port of the housing 5.

[0041] The pre-filter device disclosed in this solution is integrated with a water removal function. The water removal structure 2 can be located upstream or downstream of the pre-filter structure 1.

[0042] In some embodiments, the pre-filter structure 1 is located upstream of the water removal structure 2, achieving that the pre-filter device removes oil first and then water, reducing engine oil loss.

[0043] In some embodiments, the water removal structure 2 includes a filter element, which is filled in the housing 5 and used to absorb the moisture in the exhaust gas.

[0044] After the filter element is filled in the housing 5, the position of the housing 5 filled with the filter element will be filled with the filter element, and the gap between the filter element and the circumferential inner wall of the housing 5 is very small. The filling density of the filter element is designed according to the gas pressure to ensure the flow rate and pressure of the exhaust gas.

[0045] The filling length of the filter element along the gas flow direction is also designed by those skilled in the art according to actual needs and will not be specifically limited here.

[0046] Along the gas flow direction, the filling of the filter element in the housing 5 can be continuous filling or segmented filling, that is, multiple segments of filter elements are arranged in the housing 5 along the gas flow direction.

[0047] The filter element preferably selects a strong water-absorbing material.

[0048] In some embodiments, the filter element includes at least one of activated carbon and silica gel. Silica gel has an open porous structure and strong water absorption; activated carbon adsorbs water vapor through capillary action on the surface pores.

[0049] The filter element can be made of a single material or a combination of two or more materials. The material selection of the filter element is not limited to the above embodiments and can also be other materials.

[0050] In the above embodiments, the pre-filter structure and the water removal structure share the housing. In some other embodiments, the pre-filter structure and the water removal structure can each have their own independent housing. In this embodiment, communication ports need to be provided at the connection positions of the two housings to achieve the communication of the two housings.

[0051] In some embodiments, a partition 51 is provided inside the housing 5. The partition 51 is used to divide the inner cavity of the housing 5 into a pre-filter cavity and a water removal cavity. A pre-filter structure 1 is provided in the pre-filter cavity, and a water removal structure 2 is provided in the water removal cavity. A communication port for communicating the pre-filter cavity with the water removal cavity is formed on the partition 51.

[0052] The partition 51 realizes the spatial separation of the pre-filter structure 1 and the water removal structure 2, enabling them to have independent working spaces and reducing mutual interference during the working process.

[0053] The position, quantity, and size of the communication port provided on the partition 51 are selected by those skilled in the art according to actual needs.

[0054] The pre-filter device disclosed in this solution further includes a heater 4 provided outside the water removal cavity. The heater 4 is used to heat the water removal cavity to increase the temperature inside the water removal cavity, thereby accelerating the volatilization of moisture in the water removal structure 2 and drying the water removal structure 2 for convenient reuse.

[0055] The heater 4 is preferably an electric heater. In the embodiment where the heater 4 is electrically heated, the heater 4 is a heating wire or a heating sheet, etc.

[0056] The heater 4 is powered by the vehicle battery and controlled by the ECU.

[0057] The water removal structure 2 disclosed in this solution can be used repeatedly multiple times to reduce the cost of the pre-filter device.

[0058] The partition 51 can also prevent the water vapor generated by heating from flowing between the two cavities, causing the water vapor to concentrate in the cavity where the water removal structure 2 is provided.

[0059] The heater 4 heats the water removal structure 2 in the parking condition. During the running condition, the heater 4 does not work. At this time, the water removal structure 2 removes the moisture in the exhaust gas.

[0060] The heater 4 heats the water removal cavity, and the moisture absorbed by the water removal structure 2 evaporates into the water removal cavity, resulting in an increase in the air pressure in the water removal cavity. At this time, a pressure relief valve needs to be provided in the water removal cavity. When the pressure in the water removal cavity exceeds the set pressure of the pressure relief valve, the pressure relief valve opens to discharge the water vapor generated during the drying process of the water removal structure 2.

[0061] In some embodiments, the pre-filter device further includes a drain valve 21. The drain valve 21 is provided on the water removal cavity. Optionally, the drain valve 21 is provided below the water removal cavity so that the water accumulated in the water removal cavity can be discharged under the action of its own gravity without the need to provide other power.

[0062] The drain valve 21 can be manually opened, or the drain valve 21 can be communicatively connected to the ECU. The ECU controls the opening and closing of the drain valve 21 based on the engine speed signal to ensure that the drain valve 21 is only opened during the shutdown condition.

[0063] For a closed-loop model, a drain valve 21 can be provided in the water removal chamber. The drain valve 21 is a solenoid valve, and the ECU controls the opening and closing of the drain valve 21 based on the engine speed signal to ensure that the drain valve 21 is only opened during the shutdown condition. In this embodiment, the drain valve can integrate the functions of a pressure relief valve and an electromagnetic cut-off valve.

[0064] The pre-filter structure 1 includes at least one baffle that can collide with the exhaust gas to achieve oil-gas separation, separating oil droplets from the exhaust gas.

[0065] The pre-filter structure 1 can be provided with a plurality of baffles arranged in a labyrinth pattern;

[0066] Or, the pre-filter structure 1 has baffles arranged in a spiral pattern;

[0067] Or, the pre-filter structure 1 has a plurality of baffles arranged in parallel and inclined with respect to the air flow direction;

[0068] Or, the pre-filter structure 1 has a plurality of parallel V-shaped baffles;

[0069] Or, the pre-filter structure 1 is a combination of at least two of the above methods.

[0070] The pre-filter structure 1 and the housing 5 are made of the same or different materials. The pre-filter structure 1 and the housing 5 are preferably made of corrosion-resistant materials. There are various connection methods between the pre-filter structure 1 and the housing 5, which can be welding connection, bolt connection, riveting, etc.

[0071] The present application also discloses an oil-gas separator, including an oil-gas separator body 3 and a pre-filter device, and the pre-filter device is the pre-filter device described in any one of the above solutions.

[0072] Since the pre-filter device has the above technical effects, the oil-gas separator with this pre-filter device also has the same technical effects, which will not be elaborated here.

[0073] The present application also discloses an engine having an oil-gas separator, and the oil-gas separator is the oil-gas separator described in the above solution.

[0074] Since the oil-gas separator has the above technical effects, the engine with this oil-gas separator also has the same technical effects, which will not be elaborated here.

[0075] The above description is only a preferred embodiment of the present application and an explanation of the applied technical principles, and is not intended to limit the present application. For those skilled in the art, various modifications and variations can be made to the present application. The scope of the application involved in the present application is not limited to the technical solutions formed by the specific combination of the above technical features, and should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the above application concept. For example, the technical solutions formed by mutually replacing the above features with the technical features (but not limited to) disclosed in the present application that have similar functions.

Claims

1. A pre-filtration device, characterized in that: It comprises a housing (5), a pre-filter structure (1) and a water removal structure (2), The housing (5) has an inlet and an outlet, The pre-filter structure (1) and the water removal structure (2) are arranged in the housing (5) and located between the inlet and the outlet; the pre-filter structure (1) is used to remove oil from the exhaust gas, and the water removal structure (2) is used to remove moisture from the exhaust gas.

2. The pre-filter device according to claim 1, characterized in that: The water removal structure (2) is a filter element, which is filled in the housing (5) and is used to absorb moisture in the exhaust gas.

3. The pre-filter device according to claim 2, characterized in that: The filter element includes at least one of activated carbon and silica gel.

4. The pre-filter device according to any one of claims 1 to 3, characterized in that: A partition (51) is provided in the shell (5) for separating the inner cavity of the shell (5) into a pre-filter cavity and a dewatering cavity. The pre-filter structure (1) is provided in the pre-filter cavity, and the dewatering structure (2) is provided in the dewatering cavity. A connecting port for connecting the pre-filter cavity and the dewatering cavity is provided on the partition (51).

5. The pre-filter device according to claim 4, characterized in that: It also includes a heater (4) which is arranged outside the dewatering chamber and is used to heat the dewatering chamber to accelerate the volatilization of water in the dewatering structure (2). The dewatering chamber is provided with a pressure relief valve for relieving pressure in the dewatering chamber to reduce the internal pressure of the dewatering chamber; and / or, It also includes a drain valve (21) arranged in the water removal chamber, and the drain valve (21) is communicatively connected with the ECU to control the drain valve (21) to open when the engine is in a shutdown state.

6. The pre-filter device according to claim 1, characterized in that: The pre-filter structure (1) has a plurality of baffles arranged in a maze-like manner; Or, the pre-filter structure (1) has baffles arranged in a spiral shape; Alternatively, the pre-filter structure (1) comprises a plurality of baffles arranged in parallel and inclined relative to the airflow direction; Alternatively, the pre-filter structure (1) has a plurality of V-shaped baffles arranged in parallel.

7. The pre-filter device according to claim 1, characterized in that: The pre-filter structure (1) is located upstream of the water removal structure (2).

8. The pre-filter device according to claim 1, characterized in that: The pre-filter structure (1) and the shell (5) are made of the same material.

9. An oil-gas separator, characterized in that: It comprises an oil-gas separator body (3) and a pre-filter device, wherein the pre-filter device is the pre-filter device according to any one of claims 1 to 8.

10. An engine, characterized in that: It comprises an oil-gas separator, and the oil-gas separator is the oil-gas separator according to claim 9.

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