Fuel oil filtering device, exhaust control method thereof and vehicle

Abstract

The invention provides a fuel oil filtering device, an exhaust control method thereof and a vehicle, and relates to the technical field of vehicles. The fuel oil filtering device comprises a shell assembly, the shell assembly is provided with a containing cavity, the containing cavity is provided with an oil inlet, an oil outlet and an air outlet, the air outlet is communicated with an oil tank through a degassing pipeline, the degassing pipeline is provided with a sealing valve, and the sealing valve is used for controlling on-off of the degassing pipeline; the filtering assembly is arranged in the containing cavity, the filtering assembly is provided with a filtering cavity with an opening in one end, and the opening of the filtering cavity corresponds to the oil outlet. According to the technical scheme, fuel oil is effectively degassed when the positive pressure oil supply system is filtered for the first time, the cost is low, the degassing effect is good, it is avoided that gas is accumulated in a high-pressure oil way, normal operation of an engine is affected, and the stability and reliability of a fuel oil system are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of automobiles, and in particular, to a fuel filtering device, an exhaust control method thereof, and a vehicle. Background Art

[0002] At present, most of the low-pressure fuel supply systems of commercial vehicles are negative pressure systems, and gases are dissolved in the fuel. In this negative pressure environment, when the fuel passes through porous media such as diesel filter elements, the dissolved gases will precipitate, and the precipitated gases will cause the instability of the rail pressure, thereby affecting the power output and fuel consumption performance of the engine.

[0003] If we want to eliminate the influence of the precipitated gases, we need to add an electric pump degassing mechanism in the low-pressure diesel filter, which increases the cost, and the degassing effect is not ideal under the condition of high engine load.

[0004] In the prior art, the positive pressure fuel supply system has not been widely applied. In addition to the problem of insufficient reliability, there is also a lack of an effective degassing mechanism.

[0005] In view of the above technical problems, no effective solution has been proposed yet. Summary of the Invention

[0006] The main object of the present invention is to provide a fuel filtering device, an exhaust control method thereof, and a vehicle to solve the problems of poor degassing reliability and high cost of the positive pressure fuel supply system in the prior art.

[0007] To achieve the above object, according to one aspect of the present invention, there is provided a fuel filtering device, including: a housing assembly, the housing assembly having an accommodation cavity, the accommodation cavity having an oil inlet, an oil outlet, and an air outlet, the air outlet being communicated with a fuel tank through an exhaust pipeline, and a sealing valve being provided on the exhaust pipeline for controlling the on-off of the exhaust pipeline; a filtering assembly, the filtering assembly being disposed in the accommodation cavity, the filtering assembly having a filtering cavity with one end open, and the opening of the filtering cavity being correspondingly disposed opposite to the oil outlet.

[0008] Further, the fuel filtering device further includes: an oil outlet pipeline, at least a part of the oil outlet pipeline passing through the opening of the filtering cavity and extending into the filtering cavity; an oil level monitoring assembly, the oil level monitoring assembly being disposed in the filtering cavity, the oil level monitoring assembly including a floating mark and a control unit, the floating mark being movably disposed on the pipe wall of the oil outlet pipeline, and the position of the floating mark being set to change with the height of the fuel liquid level in the filtering cavity; wherein, the control unit is electrically connected to the sealing valve, and the control unit is used for detecting the position of the floating mark and controlling the opening and closing of the sealing valve based on the position of the floating mark.

[0009] Further, the floating identifier has a first position and a second position that are oppositely arranged along the extending direction of the oil outlet pipeline. When the floating identifier is in the first position, the sealing valve is opened, and when the floating identifier is in the second position, the sealing valve is closed, wherein the first position is arranged away from the oil outlet, and the second position is arranged close to the oil outlet.

[0010] Further, the oil level monitoring assembly further includes: a first sensor arranged at one end of the oil outlet pipeline away from the oil outlet, the first sensor being electrically connected to the control unit; a second sensor arranged at one end of the oil outlet pipeline close to the oil outlet, the second sensor being electrically connected to the control unit; wherein the floating identifier is arranged between the first sensor and the second sensor, the floating identifier has the first position in contact with the first sensor, and the floating identifier has the second position in contact with the second sensor.

[0011] Further, the floating identifier is arranged along the circumferential direction of the oil outlet pipeline, part of the floating identifier is immersed in the fuel, and the other part of the floating identifier is located above the fuel liquid level, wherein the height of the geometric center of the floating identifier is the same as the height of the fuel liquid level.

[0012] Further, magnetic materials are arranged on the floating identifier, both the first sensor and the second sensor are magnetic flux sensors, and the first sensor and the second sensor are used to detect the magnetic field intensity of the floating identifier to detect the fuel liquid level height.

[0013] Further, the oil outlet pipeline has an oil suction port communicated with the filtering cavity, the first sensor is arranged at a distance from the oil suction port, or the first sensor is arranged at the oil suction port.

[0014] According to another aspect of the present invention, there is provided a method for controlling the exhaust of a fuel filtering device. The method is carried out by using the above fuel filtering device, and the method includes: acquiring the magnetic field intensity information of the oil level monitoring assembly; in response to the magnetic field intensity information satisfying a first preset condition, generating an exhaust control instruction for controlling the opening of the sealing valve; in response to the magnetic field intensity information satisfying a second preset condition, generating a closing control instruction for controlling the closing of the sealing valve.

[0015] Optionally, the first preset condition includes that the direction of the magnetic field intensity is a first direction, and the second preset condition includes that the direction of the magnetic field intensity is a second direction, and the second direction is arranged oppositely to the first direction.

[0016] According to another aspect of the present invention, there is also provided a vehicle having a fuel filtering device, and the fuel filtering device is the above fuel filtering device.

[0017] Applying the technical solution of the present invention, by adding a sealing valve to the exhaust gas pipeline of the housing assembly, the sealing valve can control the opening and closing of the exhaust gas pipeline, and further control the gas in the accommodating cavity to be discharged to the fuel tank through the exhaust gas pipeline. In this way, when the filtering component is arranged in the accommodating cavity, positive pressure control exhaust can be realized during the fuel rough filtering process in the housing assembly, effectively removing gas from the fuel during the primary filtering of the positive pressure fuel supply system, with low cost and good degassing effect, avoiding the accumulation of gas in the high-pressure oil circuit and affecting the normal operation of the engine, and improving the stability and reliability of the fuel system. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings forming a part of this application are used to provide a further understanding of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0019] Figure 1 shows a schematic structural diagram of a first embodiment of a fuel filtering device according to the present invention;

[0020] Figure 2 shows a schematic structural diagram of a second embodiment of a fuel filtering device according to the present invention;

[0021] Figure 3 shows a schematic structural diagram of an embodiment of a fuel filtering system according to the present invention;

[0022] Figure 4 shows a schematic structural diagram of an embodiment of a prior art fuel filtering device.

[0023] Among them, the above-mentioned accompanying drawings include the following reference numerals:

[0024] 10. Housing assembly;

[0025] 100. Accommodating cavity;

[0026] 11. Inlet port;

[0027] 12. Outlet port;

[0028] 120. Outlet pipeline;

[0029] 121. Suction port;

[0030] 13. Gas outlet;

[0031] 130. Exhaust gas pipeline;

[0032] 131. Sealing valve;

[0033] 20. Filtering component;

[0034] 200. Filtering cavity;

[0035] 30. Oil level monitoring component;

[0036] 31. First sensor;

[0037] 32. Second sensor;

[0038] 33. Floating identifier. Detailed implementation manner

[0039] It should be noted that, without conflict, the embodiments in this application and the features in the embodiments may be combined with each other. The present invention will be described in detail below with reference to the drawings and in combination with the embodiments.

[0040] It should be noted that the terms used herein are only for describing specific implementation manners and are not intended to limit the exemplary implementation manners according to this application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "include" and / or "comprise" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0041] It should be noted that the terms "first", "second", etc. in the description and claims of this application and the above-mentioned drawings are used to distinguish similar objects and do not necessarily have to be used to describe a specific order or sequence. It should be understood that such terms can be interchanged under appropriate circumstances so that the implementation manners of this application described here can be implemented in an order different from those illustrated or described here. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or units does not necessarily have to be limited to those clearly listed steps or units, but may include other steps or units that are not clearly listed or are inherent to these processes, methods, products, or devices.

[0042] Now, the exemplary implementation manners according to this application will be described in more detail with reference to the drawings. However, these exemplary implementation manners can be implemented in many different forms and should not be construed as being limited only to the implementation manners set forth herein. It should be understood that these implementation manners are provided to make the disclosure of this application thorough and complete, and to fully convey the concept of these exemplary implementation manners to those of ordinary skill in the art. In the drawings, for clarity, the thickness of layers and regions may be enlarged, and the same reference numerals are used to denote the same devices, and thus their descriptions will be omitted.

[0043] To illustrate the positive pressure degassing effect achieved in the fuel filtration device embodiment of this application, the fuel filtration device in the prior art will be described as follows, as Figure 4 shownFigure 4 It is a schematic structural diagram of an embodiment of a fuel filtering device in the prior art.

[0044] As Figure 4 shown, the air outlet 13 of the fuel filtering device is arranged at the top of the housing assembly. One end of the air outlet 13 is communicated with the accommodating cavity 100, and the other end of the air outlet 13 is communicated with the oil outlet pipeline 120. With such an arrangement, when gas is separated out from the fuel, it cannot be discharged from the housing assembly but enters the fuel fine filter together with the oil outlet pipeline 120. This not only reduces the effective volume of the fuel but also may cause discontinuous fuel supply, thereby affecting the stability of the rail pressure. The rail pressure fluctuation is directly related to the fuel injection accuracy of the engine, affecting its power output and fuel economy.

[0045] Combined with Figures 1 to 3 shown, according to a specific embodiment of the present application, a fuel filtering device is provided.

[0046] Specifically, as Figure 1 、 Figure 3 shown, the fuel filtering device includes a housing assembly 10 and a filtering assembly 20. The housing assembly 10 has an accommodating cavity 100, and the accommodating cavity 100 has an oil inlet 11, an oil outlet 12, and an air outlet 13. The air outlet 13 is communicated with the fuel tank through an air removal pipeline 130, and a sealing valve 131 is arranged on the air removal pipeline 130. The sealing valve 131 is used to control the on-off of the air removal pipeline 130; the filtering assembly 20 is arranged in the accommodating cavity 100, and the filtering assembly 20 has a filtering cavity 200 with one end open, and the opening of the filtering cavity 200 is arranged corresponding to the oil outlet 12.

[0047] Applying the technical solution of this embodiment, by adding a sealing valve 131 to the air removal pipeline 130 of the housing assembly 10, the sealing valve 131 can control the opening and closing of the air removal pipeline 130, and further control the gas in the accommodating cavity 100 to be discharged to the fuel tank through the air removal pipeline 130. In this way, when the filtering assembly 20 is arranged in the accommodating cavity 100, positive pressure control exhaust can be realized during the fuel rough filtering process in the housing assembly 10, effectively removing gas from the fuel during the primary filtering of the positive pressure fuel supply system. The cost is relatively low, the gas removal effect is good, it avoids the accumulation of gas in the high-pressure oil circuit, affects the normal operation of the engine, and improves the stability and reliability of the fuel system.

[0048] Specifically, as Figure 1 、 Figure 2As shown, the fuel filtering device further includes an oil outlet pipeline 120 and an oil level monitoring component 30. At least a part of the oil outlet pipeline 120 passes through the opening of the filtering chamber 200 and extends into the filtering chamber 200. The oil level monitoring component 30 is arranged in the filtering chamber 200. The oil level monitoring component 30 includes a floating identifier 33 and a control unit. The floating identifier 33 is movably arranged on the pipe wall of the oil outlet pipeline 120, and the position of the floating identifier 33 is set according to the change of the fuel liquid level height in the filtering chamber 200. Wherein, the control unit is electrically connected to the sealing valve 131, and the control unit is used to detect the position of the floating identifier 33 and control the opening and closing of the sealing valve 131 based on the position of the floating identifier 33. By utilizing the characteristic that the floating identifier 33 changes with the liquid level, detecting its position through the control unit, and then controlling the opening and closing state of the sealing valve 131, an automatic degassing function can be realized, improving the degassing efficiency and accuracy. At the same time, by automatically controlling the opening and closing state of the sealing valve 131 through the control unit, problems such as the failure of the sealing valve 131 easily caused by using a mechanical valve or manual control of exhaust and the untimely exhaust affecting the engine performance can be avoided, reducing the maintenance cost and improving the overall performance of the vehicle.

[0049] It should be noted that the floating identifier 33 freely moves up and down along the pipe wall of the oil outlet pipeline 120 according to the height of the fuel liquid level. The floating identifier 33 transmits its own position information to the control unit. Since the floating identifier 33 can move according to the fuel liquid level height, the height of the fuel liquid level in the filtering chamber 200 can be obtained according to the position of the floating identifier 33, and then the control unit can judge whether to open the sealing valve 131 according to the fuel liquid level height.

[0050] In an embodiment of the present application, the control unit is electrically connected to the sealing valve 131 to control the on-off of the sealing valve 131. At the same time, the control unit can be electrically connected to the operation panel in the vehicle cab, so that the state of the fuel filtering device and the state of the sealing valve 131 can be intuitively fed back to the driver or operator. The operator can also directly control the state of the sealing valve 131 through the operation panel, increasing the operation convenience and improving the intelligent and automatic level of the control of the fuel filtering device.

[0051] Furthermore, the floating identifier 33 has a first position and a second position that are oppositely arranged along the extension direction of the oil outlet pipeline 120. When the floating identifier 33 is in the first position, the sealing valve 131 is opened, and when the floating identifier 33 is in the second position, the sealing valve 131 is closed. Among them, the first position is set far from the oil outlet 12, and the second position is set close to the oil outlet 12. Since the floating identifier 33 can move along with the fuel liquid level height, the on-off action of the sealing valve 131 is triggered by the position change of the floating identifier 33 at different liquid levels. When the oil level drops to a certain extent, that is, when the floating identifier 33 reaches the first position, the sealing valve 131 is opened to allow gas to be discharged; on the contrary, when the oil level rises to the floating identifier 33 reaches the second position, the sealing valve 131 is closed to stop gas discharge, and the degassing strategy can be adjusted according to the real-time oil level.

[0052] It should be noted that the first position is the position where the fuel liquid level is relatively low. When there is a large amount of gas stored in the filter chamber 200, the air pressure in the fuel filtering device gradually increases, which can press the fuel and the floating identifier 33 to move towards the first position. When the floating identifier 33 reaches the first position, it indicates that the air pressure in the filter chamber 200 is relatively large and there is a lot of gas. At this time, the sealing valve 131 is controlled to be opened, and the fuel filtering device is connected to the fuel tank through the degassing pipeline 130, so that the air pressure in the filter chamber 200 is reduced until it is the same as the air pressure in the fuel tank or the floating identifier 33 reaches the second position, and then the sealing valve 131 is controlled to be closed; the second position is the position where the fuel liquid level is relatively high.

[0053] Furthermore, as Figure 1 、 Figure 2 shown, the oil level monitoring component 30 further includes a first sensor 31 and a second sensor 32. The first sensor 31 is arranged at one end of the oil outlet pipeline 120 far from the oil outlet 12, and the first sensor 31 is electrically connected to the control unit; the second sensor 32 is arranged at one end of the oil outlet pipeline 120 close to the oil outlet 12, and the second sensor 32 is electrically connected to the control unit; among them, the floating identifier 33 is arranged between the first sensor 31 and the second sensor 32, and the floating identifier 33 has a first position in contact with the first sensor 31, and the floating identifier 33 has a second position in contact with the second sensor 32. By using two sensors to respectively detect the states of the floating identifier 33 at high liquid level and low liquid level, through the logical judgment of the control unit, the precise control of the sealing valve 131 is realized, the response speed and control accuracy of the system are improved, the degassing strategy can be quickly adjusted under different working conditions, and the stable operation of the fuel system is ensured.

[0054] In this embodiment, the first sensor 31 is arranged at one end of the oil outlet pipeline 120 far from the oil outlet 12, usually in a relatively low position, representing the lower limit of oil level monitoring; the second sensor 32 is arranged at one end of the oil outlet pipeline 120 close to the oil outlet 12, representing the upper limit of oil level monitoring, that is, the normal fuel liquid level.

[0055] Further, the floating identifier 33 is arranged circumferentially along the fuel outlet pipeline 120. Part of the floating identifier 33 is immersed in the fuel, and the other part of the floating identifier 33 is located above the fuel liquid level. Among them, the height of the geometric center of the floating identifier 33 is the same as the height of the fuel liquid level. By using the geometric shape and position of the floating identifier 33, with the geometric center of the floating identifier 33 as the reference point for determining the fuel liquid level height, it can be ensured that it can accurately reflect the change of the fuel liquid level. Even if there is a small amount of dissolved gas in the oil pipeline, it can be detected through the small displacement of the floating identifier 33, improving the sensitivity and accuracy of the oil level monitoring.

[0056] It should be noted that the floating identifier 33 is a ring-shaped sleeve structure sleeved on the fuel outlet pipeline 120 and is set to a regular geometric shape. Then its geometric center is at the center of gravity of the ring-shaped sleeve structure. Such a setting can make the floating identifier 33 in the height direction of the fuel outlet pipeline 120. Combining the density of the material selected for the floating identifier 33, the part below its geometric center can be immersed in the fuel, and the part above its geometric center can be exposed above the fuel liquid level; moreover, the density of the floating identifier 33 needs to be less than the fuel density to ensure that the floating identifier 33 can float on the fuel, so that a part of the floating identifier 33 is exposed above the fuel liquid level and the other part of the floating identifier 33 is immersed in the fuel liquid level.

[0057] Further, magnetic materials are arranged on the floating identifier 33. Both the first sensor 31 and the second sensor 32 are magnetic flux sensors. The first sensor 31 and the second sensor 32 are used to detect the magnetic field intensity of the floating identifier 33 to detect the fuel liquid level height. By using the correlation between the change of the magnetic field intensity of the magnetic material and the change of the fuel liquid level, through the precise measurement of the magnetic flux sensor, non-contact monitoring of the fuel liquid level is realized, improving the safety and reliability of the oil level monitoring, avoiding the wear and faults that may be brought by traditional contact monitoring, and prolonging the service life of the equipment. Since the magnetic flux sensor can detect the magnetic field intensity of the floating identifier 33 without direct contact with the fuel, the first position and the second position can be respectively set close to the first sensor 31 and the second sensor 32, and then the sealing valve 131 can be controlled to open or close accordingly.

[0058] It should be noted that magnetic materials are arranged on the floating identifier 33. The magnetic materials can generate a magnetic field. Then when the floating identifier 33 moves, based on the relative position change with the floating identifier 33, the magnetic field intensity detected by the first sensor 31 and the second sensor 32 also changes accordingly. When the magnetic field intensity detected by the first sensor 31 or the second sensor 32 reaches the preset intensity, the control unit can control the sealing valve 131 to open according to the signal transmitted by the first sensor 31, or the control unit can control the sealing valve 131 to close according to the signal transmitted by the second sensor 32.

[0059] Further, the oil outlet pipeline 120 has an oil suction port 121 communicating with the filtering chamber 200. The first sensor 31 is arranged at a distance from the oil suction port 121, or the first sensor 31 is arranged at the oil suction port 121. By reasonably arranging the position of the sensor, it can be ensured that it can accurately detect the change of the fuel level, and at the same time, the interference and failure that may be caused by the direct exposure of the sensor in the oil flow are avoided, improving the working stability and data accuracy of the sensor, and being able to provide reliable oil level monitoring results under various oil flow conditions. When the first sensor 31 is arranged at a distance from the oil suction port 121, the direct impact of the oil flow on the sensor can be reduced, avoiding possible interference, so that the sensor can work in a relatively stable environment, thereby improving the accuracy and stability of the measurement; when the first sensor 31 is arranged at the oil suction port 121, the subtle change of the fuel level can be monitored more directly.

[0060] According to another specific embodiment of the present application, a method for controlling the exhaust of a fuel filtering device is further provided. The method is carried out by using the fuel filtering device in the above embodiment. The method includes:

[0061] Step S10, obtaining the magnetic field intensity information of the oil level monitoring component;

[0062] Specifically, when the oil level monitoring component is started, the first sensor and the second sensor obtain the magnetic field intensity information generated by the floating identifier in real time. The magnetic field intensity information includes the magnetic field direction and magnetic field intensity at the first sensor, and the magnetic field direction and magnetic field intensity at the second sensor.

[0063] In step S10, after the first sensor and the second sensor obtain the magnetic field intensity information of the floating identifier, they send the magnetic field intensity information to the control unit for data processing and analysis, so as to analyze the magnetic field intensity at different positions.

[0064] Step S12, in response to the magnetic field intensity information satisfying the first preset condition, generating an exhaust control instruction for controlling the opening of the sealing valve;

[0065] Specifically, the first preset condition is that after the control unit analyzes the magnetic field intensity information obtained by the first sensor in real time, when the magnetic field intensity monitored by the first sensor satisfies the first preset condition, it means that the floating identifier has reached the first position. The control unit generates an exhaust control instruction for controlling the opening of the sealing valve to allow the gas to be discharged through the exhaust pipeline.

[0066] Step S14, in response to the magnetic field intensity information satisfying the second preset condition, generating a closing control instruction for controlling the closing of the sealing valve.

[0067] Specifically, the second preset condition is that after the control unit analyzes the magnetic field intensity information obtained by the second sensor in real time, when the magnetic field intensity monitored by the second sensor meets the second preset condition, it indicates that the floating identifier has reached the second position, and the control unit will generate a closing control instruction to control the sealing valve to close.

[0068] Through the above steps, the magnetic field intensity information of the oil level monitoring component is obtained; in response to the magnetic field intensity information meeting the first preset condition, an exhaust control instruction is generated, and the exhaust control instruction is used to control the opening of the sealing valve; in response to the magnetic field intensity information meeting the second preset condition, a closing control instruction is generated, and the closing control instruction is used to control the closing of the sealing valve. By adding a sealing valve to the exhaust pipeline of the housing assembly, the sealing valve can control the opening and closing of the exhaust pipeline, and further control the gas in the accommodation cavity to be discharged to the fuel tank through the exhaust pipeline. In this way, when the filter assembly is arranged in the accommodation cavity, positive pressure control exhaust can be realized during the fuel oil rough filtration process in the housing assembly, effectively removing gas from the fuel during the primary filtration of the positive pressure fuel supply system, with low cost and good degassing effect, avoiding the accumulation of gas in the high-pressure oil circuit, affecting the normal operation of the engine, and improving the stability and reliability of the fuel system.

[0069] In this embodiment, the control unit effectively utilizes the sensitivity of the magnetic flux sensor to the change of the magnetic field intensity through the exhaust control instruction, the closing control instruction and the logic of instruction generation, and monitors the precipitation and accumulation of gas in the oil in real time by detecting the change of the position of the floating identifier. Through the preset exhaust control conditions, the opening and closing of the sealing valve can be automatically and accurately controlled to achieve the purpose of efficiently and timely discharging the gas in the oil, so as to maintain the stable operation of the high-pressure common rail diesel engine and improve the power output and fuel consumption performance of the engine.

[0070] It should be noted that after the control unit monitors the respective magnetic field intensities through the first sensor and the second sensor, it can perform comprehensive control. As long as the floating identifier moves to the first position, the control will adjust the sealing valve to the open state. On the contrary, when the floating identifier moves to the second position, the control will adjust the sealing valve to the closed state, avoiding simply switching the switch to adjust the sealing valve, and thus avoiding the misjudgment caused by the state switching of the sealing valve.

[0071] Optionally, the first preset condition includes that the direction of the magnetic field strength is the first direction, and the second preset condition includes that the direction of the magnetic field strength is the second direction, and the second direction is set opposite to the first direction. When the direction of the magnetic field is the first direction, it indicates that the floating identifier is moving downward, that is, the gas in the oil liquid precipitates and causes the volume of the oil liquid to decrease, and the position of the floating identifier drops. Then, by comprehensively detecting the magnetic field strength at the first sensor, when the magnetic field strength reaches the threshold value specified by the first preset condition, it indicates that degassing operation is required. The control unit responds to this change in the magnetic field direction and generates an exhaust control instruction, which is used to control the opening of the sealing valve, so that the gas inside the fuel tank can be discharged through the exhaust pipeline, and the positive pressure environment inside the fuel tank is restored. When the direction of the magnetic field is the second direction, it indicates that the floating identifier is moving upward, that is, the normal emission of the gas in the oil liquid causes the oil liquid level to rise, and the position of the floating identifier rises. By comprehensively detecting the magnetic field strength at the second sensor, when the magnetic field strength reaches the threshold value specified by the second preset condition, it indicates that the degassing has been completed. The control unit responds to this change in the magnetic field direction and generates a closing control instruction, which is used to control the closing of the sealing valve, stop the degassing process, prevent the outside air from entering again, and at the same time avoid unnecessary overflow of the oil liquid, and maintain the stable operation of the system.

[0072] According to another specific embodiment of the present application, a vehicle is further provided. The vehicle has a fuel filtering device, and the fuel filtering device is the fuel filtering device in the above embodiment. Integrating the above fuel filtering device into the fuel supply system of the vehicle can improve the operation efficiency and reliability of the entire system, enable the fuel system of the vehicle to better adapt to various working conditions, reduce the rail pressure fluctuation, improve the power output and fuel consumption performance of the engine. Especially when the vehicle is in a large load working condition, the positive pressure degassing effect is more obvious, ensuring the efficient operation of the engine under various working conditions.

[0073] As Figure 1 shown, the present application also provides a preferred embodiment of a fuel filtering device, which can achieve an effective degassing effect in a positive pressure environment for the low-pressure oil circuit.

[0074] Specifically, the fuel filtering device has a housing assembly 10, an inlet pipe, an outlet pipeline 120, an exhaust pipeline 130, a floating identifier 33, a first sensor 31, a second sensor 32, and a sealing valve 131. The floating identifier 33 slides up and down along the outlet pipeline 120 under the action of buoyancy in the liquid. The second sensor 32 and the first sensor 31 are arranged up and down on the outlet pipeline 120. The exhaust pipeline 130 is arranged above the housing assembly 10, and the sealing valve 131 is arranged in the exhaust pipeline 130.

[0075] Its degassing principle is as follows:

[0076] When there is more and more gas inside the fuel filter device, the liquid level inside the fuel filter device will become lower and lower, causing the position of the floating identifier 33 to get closer and closer to the first sensor 31 at the bottom. When the floating identifier 33 of the fuel filter device contacts the first sensor 31, the first sensor 31 sends a signal to the control unit, and the control unit controls the sealing valve 131 to open. At this time, the exhaust gas pipeline 130 is connected to the top of the fuel tank, and the gas inside the fuel filter device is discharged into the tank under pressure.

[0077] As the gas is discharged, the liquid level inside the fuel filter device becomes higher and higher, and the floating identifier rises under the action of buoyancy. When the floating identifier contacts the second sensor 32 arranged on the upper part of the oil outlet pipeline 120, the second sensor 32 sends a signal to the control unit, and the control unit controls the sealing valve 131 to close. At this time, the exhaust gas pipeline 130 is disconnected.

[0078] For the sake of description, spatial relative terms, such as "above", "over", "on the upper surface", "upper", etc., can be used here to describe the spatial position relationship between a device or feature shown in the figure and other devices or features. It should be understood that spatial relative terms are intended to include different orientations in use or operation in addition to the orientation described in the figure for the device. For example, if the device in the attached drawing is inverted, the device described as "above" or "over" other devices or structures will be positioned as "below" or "under" other devices or structures after inversion. Thus, the exemplary term "above" can include both the orientations of "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and corresponding interpretations should be made for the spatial relative descriptions used here.

[0079] In addition to the above, it should also be noted that the "one embodiment", "another embodiment", "embodiment", etc. mentioned in this specification refer to the specific features, structures or characteristics described in connection with that embodiment being included in at least one embodiment generally described in this application. The same expression appearing in multiple places in the specification does not necessarily refer to the same embodiment. Further, when describing a specific feature, structure or characteristic in connection with any one embodiment, it is intended that the implementation of such feature, structure or characteristic in connection with other embodiments also falls within the scope of the present invention.

[0080] In the above embodiments, the descriptions of each embodiment have their own emphases. For the parts not detailed in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0081] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, various modifications and variations can be made to the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A fuel filtering device, characterized in that, Comprising: A housing assembly (10), the housing assembly (10) having a receiving cavity (100), the receiving cavity (100) having an oil inlet (11), an oil outlet (12) and a gas outlet (13), the gas outlet (13) being communicated with a fuel tank through an exhaust gas pipeline (130), a sealing valve (131) being provided on the exhaust gas pipeline (130), the sealing valve (131) being used to control the on-off of the exhaust gas pipeline (130); A filtering assembly (20), the filtering assembly (20) being arranged in the receiving cavity (100), the filtering assembly (20) having a filtering cavity (200) with one end open, the opening of the filtering cavity (200) being arranged corresponding to the oil outlet (12).

2. The fuel filtering device according to claim 1, wherein The fuel filtering device further comprises: An oil outlet pipeline (120), at least a part of the oil outlet pipeline (120) passing through the opening of the filtering cavity (200) and extending into the filtering cavity (200); An oil level monitoring assembly (30), the oil level monitoring assembly (30) being arranged in the filtering cavity (200), the oil level monitoring assembly (30) comprising a floating mark (33) and a control unit, the floating mark (33) being movably arranged on the pipe wall of the oil outlet pipeline (120), the position of the floating mark (33) being set according to the change of the fuel liquid level height in the filtering cavity (200); Wherein, the control unit is electrically connected to the sealing valve (131), and the control unit is used to detect the position of the floating mark (33) and control the opening and closing of the sealing valve (131) based on the position of the floating mark (33).

3. The fuel filtering device according to claim 2, wherein, The floating mark (33) has a first position and a second position oppositely arranged along the extending direction of the oil outlet pipeline (120). When the floating mark (33) is in the first position, the sealing valve (131) is opened, and when the floating mark (33) is in the second position, the sealing valve (131) is closed. Wherein, the first position is arranged far from the oil outlet (12), and the second position is arranged close to the oil outlet (12).

4. The fuel filtering device according to claim 3, characterized in that, The oil level monitoring assembly (30) further comprises: A first sensor (31), the first sensor (31) being arranged at one end of the oil outlet pipeline (120) far from the oil outlet (12), the first sensor (31) being electrically connected to the control unit; A second sensor (32), the second sensor (32) being arranged at one end of the oil outlet pipeline (120) close to the oil outlet (12), the second sensor (32) being electrically connected to the control unit; Wherein, the floating mark (33) is arranged between the first sensor (31) and the second sensor (32), the floating mark (33) has the first position in contact with the first sensor (31), and the floating mark (33) has the second position in contact with the second sensor (32).

5. The fuel filtering device according to claim 3, characterized in that, The floating identifier (33) is arranged along the circumferential direction of the fuel outlet pipeline (120), with part of the floating identifier (33) immersed in the fuel and the other part located above the fuel liquid level. Among them, the height of the geometric center of the floating identifier (33) is the same as the height of the fuel liquid level.

6. The fuel filtering device according to claim 4, characterized in that, Magnetic materials are provided on the floating identifier (33). Both the first sensor (31) and the second sensor (32) are magnetic flux sensors. The first sensor (31) and the second sensor (32) are used to detect the magnetic field intensity of the floating identifier (33) to detect the height of the fuel liquid level.

7. The fuel filtering device according to claim 4, characterized in that, The fuel outlet pipeline (120) has an oil suction port (121) communicating with the filtration chamber (200). The first sensor (31) is arranged at a distance from the oil suction port (121), or the first sensor (31) is arranged at the oil suction port (121).

8. A method for controlling exhaust of a fuel filtering device, characterized in that The method is carried out by using the fuel filtration device described in any one of claims 1-7. The method includes: Obtaining the magnetic field intensity information of the oil level monitoring component; In response to the magnetic field intensity information satisfying a first preset condition, generating an exhaust control instruction for controlling the opening of the sealing valve; In response to the magnetic field intensity information satisfying a second preset condition, generating a closing control instruction for controlling the closing of the sealing valve.

9. The exhaust gas control method of the fuel filtering device according to claim 8, characterized in that, The first preset condition includes that the direction of the magnetic field intensity is a first direction, and the second preset condition includes that the direction of the magnetic field intensity is a second direction, and the second direction is arranged opposite to the first direction.

10. A vehicle, characterized in that, The vehicle is equipped with a fuel filtration device, and the fuel filtration device is the fuel filtration device described in any one of claims 1-7.

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