Air cleaner, control method for intake system, and vehicle

Abstract

The application provides an air filter, a control method of an air intake system and a vehicle. The air filter comprises: a first shell and a second shell which are arranged in a top-down buckling mode, an air inlet is arranged on a first side of the first shell, and an air outlet is arranged on a first side or a second side corresponding to the first side of the second shell; a filter element is arranged on the first shell and between the air inlet and the air outlet; one end of a first flow guide plate is arranged on a second side of the first shell and close to the air inlet on a side below the filter element. The application can reduce the pressure on the corresponding side and the bottom of the first shell of the air filter, improve the efficiency of air flow out of the air outlet, and thus improve the air intake efficiency of the engine.

Description

Technical Field

[0001] This invention relates to the field of vehicle control technology, and in particular to an air filter, a control method for an intake system, and a vehicle. Background Technology

[0002] The vehicle's intake system is a crucial system for maintaining the normal operation of the engine. Its main function is to provide the engine with clean, sufficient air, and the air filter is a key component affecting this function.

[0003] Currently, an air filter includes a first housing, a second housing, an air inlet, an air outlet, and a filter element. The air inlet is located on the second housing, the air outlet is located on the first housing, and the filter element is located in the cavity between the air inlet and the air outlet. Gas flows from the air inlet to the filter element for filtration and then flows out from the air outlet, allowing clean air to enter the engine.

[0004] However, existing air filters can only filter air. As the intake air volume of the engine increases, the airflow forms a vortex at the bottom of the air filter's housing, which generates excessive pressure on the inner wall of the housing. The airflow cannot pass smoothly through the filter element into the engine, reducing the engine's intake efficiency. Summary of the Invention

[0005] This invention provides an air filter, a control method for an intake system, and a vehicle to solve the problem in the prior art where increasing engine intake airflow creates significant pressure on the inner wall of the air filter's cavity, reducing intake efficiency.

[0006] In a first aspect, embodiments of the present invention provide a vehicle air intake system, comprising: a first housing, a second housing, a filter element, and a first deflector;

[0007] The first housing and the second housing are snapped together vertically, and an air inlet is provided on the first side of the first housing, and an air outlet is provided on the first side or the second side corresponding to the first side of the second housing.

[0008] The filter element is located on the first housing and between the air inlet and the air outlet;

[0009] One end of the first guide plate is disposed on the second side of the first housing and is located below the filter element near the air inlet.

[0010] In one possible implementation, it also includes: a first driving component;

[0011] The first drive assembly is connected to one end of the first guide plate and is used to drive the first guide plate to rotate, so that the first included angle between the first guide plate and the filter element changes with the air flow rate in the first housing.

[0012] In one possible implementation, it also includes: a second guide plate and a second drive assembly;

[0013] One end of the second guide plate is disposed on the first side of the second housing and is located on the filter element near the air outlet.

[0014] The second drive assembly is connected to one end of the second guide plate and is used to drive the second guide plate to rotate, so that the second included angle between the second guide plate and the filter element changes with the air flow rate inside the housing.

[0015] In one possible implementation, the first drive component includes a first housing drive mechanism and a first rotating shaft;

[0016] The rotating shaft of the first housing drive mechanism is fixedly connected to the first rotating shaft, and the first rotating shaft is fixedly connected to one end of the first guide plate;

[0017] The second drive assembly includes a second housing drive mechanism and a second rotating shaft;

[0018] The rotating shaft of the second housing drive mechanism is fixedly connected to the second rotating shaft, and the second rotating shaft is fixedly connected to one end of the second guide plate.

[0019] In one possible implementation, the first guide plate and / or the second guide plate are straight plates or folded plates;

[0020] The folding plate is composed of at least two straight plates that are movably connected.

[0021] In one possible implementation, sound-absorbing material is provided on one side of the first guide plate and the second guide plate corresponding to the filter element;

[0022] The length of the first guide plate is greater than the difference between the length of the filter element and the length of the second guide plate.

[0023] Secondly, embodiments of the present invention provide a control method for an intake system, comprising: employing a vehicle intake system as described in any of the above possible implementations, further employing an air mass flow meter and an electronic control unit (ECU), wherein the air mass flow meter is disposed at the air outlet of an air filter and connected to the ECU, and the control method for the intake system comprises:

[0024] During engine operation, the ECU receives real-time airflow data from an air mass flow meter located at the air filter outlet.

[0025] The ECU determines the first angle between the first guide plate and the filter element in the air filter based on the current air flow, and controls the first guide plate to rotate to a position where it forms the first angle with the filter element.

[0026] In one possible implementation, the ECU is also connected to a first drive assembly and a second drive assembly in the air filter;

[0027] The ECU controls the first guide vane to rotate to a position forming a first angle with the filter element, including:

[0028] The ECU sends the first angle to the first drive assembly; the first drive assembly drives the first guide plate to rotate to a position forming the first angle with the filter element;

[0029] It also includes: while the ECU determines the first included angle between the first guide plate and the filter element in the air filter based on the current air flow, it determines the second included angle between the second guide plate and the filter element in the air filter, and sends the second included angle to the second drive assembly;

[0030] The second drive assembly drives the second guide plate to rotate to a position forming a second angle with the filter element.

[0031] One possible implementation also includes:

[0032] When the ECU detects that the engine is in a stopped state, it determines that the first included angle and the second included angle are both zero.

[0033] When the ECU detects that the engine is idling, it determines that the first angle and the second angle are the set maximum angles.

[0034] Thirdly, embodiments of the present invention provide a vehicle including an air filter as described in any of the preceding claims.

[0035] This invention provides an air filter, a control method for an intake system, and a vehicle. When air enters the first housing of the air filter through the intake port, a large amount of airflow enters the space between the first guide plate and the filter element through the first guide plate. The airflow enters the filter element more quickly for filtration along the smooth side of the first guide plate facing the filter element, without the formation of eddies due to air accumulation at the corner between the second side wall and the bottom surface corresponding to the intake port. This reduces the pressure on the side wall and bottom surface of the first housing of the air filter, improves the efficiency of airflow out of the exhaust port, and thus improves the engine intake efficiency. Attached Figure Description

[0036] To more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0037] Figure 1 This is a schematic diagram of the vehicle air intake system provided in an embodiment of the present invention;

[0038] Figure 2 This is a schematic diagram of the structure of a vehicle air intake system provided in another embodiment of the present invention;

[0039] Figure 3 This is a schematic diagram of the structure of the first driving component provided in an embodiment of the present invention;

[0040] Figure 4 This is a schematic diagram of the length of the guide plate provided in an embodiment of the present invention;

[0041] Figure 5 This is a flowchart illustrating the implementation of the control method for the intake system provided in this embodiment of the invention.

[0042] Figure 6 This is a schematic diagram of the air intake system provided in an embodiment of the present invention;

[0043] Figure 7 This is a schematic diagram illustrating the relationship between airflow and resistance provided in an embodiment of the present invention;

[0044] Figure 8 This is a schematic diagram illustrating the relationship between airflow and the first and second included angles provided in an embodiment of the present invention.

[0045] Figure 9 This is a schematic diagram of the first and second included angles when the engine is idling, as provided in an embodiment of the present invention. Detailed Implementation

[0046] In the following description, specific details such as particular system architectures and techniques are set forth for illustrative purposes and not for limitation, in order to provide a thorough understanding of the embodiments of the invention. However, those skilled in the art will understand that the invention can be implemented in other embodiments without these specific details. In other instances, detailed descriptions of well-known systems, apparatuses, circuits, and methods are omitted so as not to obscure the description of the invention with unnecessary detail.

[0047] To make the objectives, technical solutions, and advantages of the present invention clearer, specific embodiments will be described below in conjunction with the accompanying drawings.

[0048] Figure 1 The structural schematic diagram of the air filter provided in the embodiment of the present invention is described in detail below. The air filter includes: a first housing 1, a second housing 2, a filter element 3, and a first guide plate 4;

[0049] The first housing 1 and the second housing 2 are fastened together vertically, and an air inlet 5 is provided on the first side of the first housing 1, and an air outlet 6 is provided on the first side or the second side corresponding to the first side of the second housing 2; optionally, the fastening part of the first housing 1 and the second housing 2 is sealed with a sealing ring.

[0050] The filter element 3 is located on the first housing 1 and between the air inlet 5 and the air outlet 6;

[0051] One end of the first guide plate 4 is located on the second side of the first housing and is located below the filter element 3 near the air inlet 5.

[0052] When air flows into the air inlet 5 of the air filter, the airflow passes through the filter element 3 and enters the second housing 2 of the air filter, and then flows out through the outlet 6 into the engine. As the airflow increases, the pressure on the second side and bottom surface corresponding to the air inlet 5 of the first housing 1 increases, and a large amount of air accumulates at the corner between the second side and bottom surface of the first housing 1, forming a vortex that cannot flow quickly into the filter element. Therefore, the efficiency of the airflow out of the outlet 6 is low, resulting in low engine intake efficiency. In this embodiment of the invention, by setting a first guide plate 4, when air enters the first housing 1 through the air inlet 5, the first guide plate 4 divides the space inside the first housing 1 of the air filter into two parts: the space between the first guide plate 4 and the filter element 3, and the space between the first guide plate 4 and the first housing 1. In this way, a large amount of airflow enters the space between the first guide plate 4 and the filter element 3, so that the airflow enters the filter element 3 for filtration more quickly along the smooth side of the first guide plate 4 facing the filter element 3, and there is no vortex formed at the corner between the second side and the bottom of the first housing 1 corresponding to the air inlet 5. This can reduce the pressure on the second side and the bottom of the lower part of the first housing 1, improve the efficiency of the airflow out of the air outlet 6, and thus improve the engine intake efficiency.

[0053] See Figure 2 The air filter may also include: a first drive assembly 7;

[0054] The first drive assembly 7 is connected to one end of the first guide plate 4 and is used to drive the first guide plate 4 to rotate, so that the first included angle between the first guide plate 4 and the filter element 3 changes with the air flow rate inside the first housing 1. (See attached...) Figure 1 and 2 In the diagram, the first included angle is denoted by A.

[0055] By driving the first drive component 7, the angle of the first guide plate 4 can be adjusted. This allows the invention to adjust the angle of the first guide plate 4 according to the size of the air intake. As the air flow increases, the first included angle decreases, thus reducing the space between the first guide plate 4 and the filter element 3. This accelerates the airflow as it enters the filter element 3 along the smooth side of the first guide plate 4 facing the filter element 3, thereby improving the air intake efficiency.

[0056] See Figure 2 Second guide plate 8 and second drive assembly 9;

[0057] One end of the second guide plate 8 is disposed on the first side of the second housing and is located on the filter element 3 near the air outlet.

[0058] The second drive assembly 9 is connected to one end of the second guide plate 8 and is used to drive the second guide plate 8 to rotate, so that the second included angle between the second guide plate 8 and the filter element 3 changes with the air flow rate inside the second housing 2. Figure 2 In the diagram, the second included angle is represented by B.

[0059] When the airflow filter element 3 enters the second housing 2 of the air filter, the second guide plate 8, driven by the second drive assembly 9, forms a second angle with the filter element 3. This allows a large amount of airflow to quickly enter the outlet 6 under the obstruction of the smooth side of the second guide plate 8 facing the filter element 3. This solves the problem in the prior art where, due to the absence of the second guide plate 8, a large amount of air accumulates at the angle formed by the first side of the second housing 2 corresponding to the outlet 6 and the top surface of the second housing 2 of the air filter, and cannot flow out. In this embodiment of the invention, the addition of the second drive assembly 9 and the second guide plate 8 further improves the efficiency of airflow out of the outlet 6, thereby improving the engine intake efficiency.

[0060] By driving the second drive assembly 9, the angle of the second guide plate 8 can be adjusted. This allows the present invention to adjust the angle of the second guide plate 8 according to the size of the air intake. As the air flow increases, the second angle decreases, thus reducing the space between the second guide plate 8 and the filter element 3. This accelerates the airflow as it enters the air outlet 6 along the smooth side of the second guide plate 4 facing the filter element 3, thereby improving the engine intake efficiency.

[0061] In one embodiment, see Figure 2 The filter element 3 is arranged parallel to the top surface of the first housing 1 and the bottom surface of the second housing 2, respectively. The parallel arrangement of the filter elements can ensure that all air is filtered, and the material of the filter element 3 is minimized, thus saving costs.

[0062] Figure 3In the middle, the first drive assembly 7 includes a first housing drive mechanism 71 and a first rotating shaft 72;

[0063] The rotating shaft of the first housing drive mechanism 71 is fixedly connected to the first rotating shaft 72, so that the first rotating shaft 72 can rotate with the rotation of the rotating shaft of the first housing drive mechanism 71. The first rotating shaft 72 is fixedly connected to one end of the first guide plate 4, so that the first guide plate 4 can change the first included angle between the first guide plate 4 and the filter element 3 with the rotation of the first rotating shaft 72.

[0064] The second drive assembly 9 includes a second housing drive mechanism and a second rotating shaft;

[0065] The rotating shaft of the second housing drive mechanism is fixedly connected to the second rotating shaft, so that the second rotating shaft can rotate with the rotation of the rotating shaft of the second housing drive mechanism. The second rotating shaft is fixedly connected to one end of the second guide plate 8, so that the second guide plate 8 can change the second included angle between the second guide plate 8 and the filter element 3 as the second rotating shaft rotates.

[0066] In one embodiment, the first guide plate 4 and / or the second guide plate 8 are straight plates or folded plates. Figure 2 The second guide vane is a straight plate, and the folding plate is composed of at least two straight plates connected in a movable manner, for example... Figure 2 The first guide vane shown is a folded plate composed of two straight plates, or it can be a folded plate composed of three straight plates. The connection between adjacent straight plates can be a hinge connection.

[0067] The structures of the first guide plate 4 and the second guide plate 8 can be the same or different. Both can be straight plates or both can be folded plates. Alternatively, the first guide plate 4 can be a straight plate and the second guide plate 8 can be a folded plate, or the first guide plate 4 can be a folded plate and the second guide plate 8 can be a straight plate.

[0068] When the first guide vane 4 is a folded plate, in the initial position when the engine starts, the other end of the first guide vane 4 contacts the bottom surface of the first housing 1. Thus, after the engine starts, because the other end of the first guide vane 4 is in contact with the first housing 1, it prevents airflow from entering the space between the first guide vane 4 and the first housing 1, preventing the formation of vortices in the airflow, improving the efficiency of the airflow exiting the exhaust port 6, and thereby improving the engine's intake efficiency.

[0069] The materials of the first guide plate 4 and the second guide plate 8 can be polypropylene (PP), polyethylene (PE), thermoplastic vulcanizate (TPV), etc.

[0070] The distance from the upper end of the filter element 3 to the inner top surface of the second housing 2 of the air filter can be S, and the length of the second guide plate 8 can be greater than or equal to S. See [reference needed]. Figure 4 The diagram shows the length of the second guide plate 8.

[0071] The length of the first guide plate 4 is greater than the difference between the length of the filter element 3 and the length of the second guide plate 8. For example, if the length of the filter element 3 is L and the length of the second guide plate 8 is S, then the length L' of the first guide plate 4 is greater than (LS). That is to say, when both the first and second included angles are 0 and the first guide plate 4 is a straight plate, there is an overlapping area between the second guide plate 8 and the first guide plate 4. In this way, when the engine is off, the overlapping area between the second guide plate 8 and the first guide plate 4, together with the filter element, forms a relatively sealed form, thereby preventing hydrocarbons emitted during engine operation from entering the air filter through the air intake and directly diffusing into the atmosphere through the filter element 3 when the engine is off, thus polluting the air.

[0072] When the engine is idling, the engine speed is low and the resonant frequency is low, which will generate low-frequency noise. Therefore, sound-absorbing material is set on the side of the first guide plate 4 and the second guide plate 8 corresponding to the filter element 3 to absorb and reduce noise. The sound-absorbing material can be slag wool, blankets, etc.

[0073] The aforementioned air filter, by adding a first guide vane, allows air entering the space between the first guide vane and the lower part of the first housing through the intake port to enter the filter element more quickly for filtration, thanks to the smooth side of the first guide vane facing the filter element. This prevents a large amount of air from accumulating at the angle formed between the second side and bottom of the first housing corresponding to the intake port, thus reducing the pressure on the second side and bottom of the first housing and improving the efficiency of airflow out of the outlet, thereby improving engine intake efficiency. As the airflow increases, the first angle between the first guide vane and the filter element decreases, further accelerating the airflow along the first guide vane towards the filter element and improving the efficiency of airflow out of the outlet. Air entering the space between the second guide vane and the second housing of the air filter through the filter element is quickly entered into the outlet by the smooth side of the second guide vane facing the filter element, further improving the efficiency of airflow out of the outlet and thus improving engine intake efficiency. As the airflow increases, the second angle between the second guide plate and the filter element decreases, further accelerating the airflow along the second guide plate to the outlet and improving the efficiency of the airflow out of the outlet.

[0074] See Figure 5 This invention also provides a control method for an intake system, employing the air filter provided in any of the above embodiments, and further employing an air mass flow meter and an ECU. The air mass flow meter is located at the air outlet of the air filter and connected to the ECU. See [link to relevant documentation]. Figure 6 A connection diagram of the intake system. The control methods for the intake system include:

[0075] Step 501: During engine operation, the ECU receives the air flow rate monitored in real time by the air mass flow meter installed at the air filter outlet.

[0076] An air mass flow meter is installed at the outlet of the second housing of the air filter to monitor the air flow at the outlet in real time during engine operation. The air mass flow meter is connected to the ECU to send the air flow data to the ECU.

[0077] It should be noted that a transmission cycle can be set. The air mass flow meter can send the monitored air flow to the ECU according to the set transmission cycle. The transmitted air flow can be the average value of the monitored air flow within the transmission cycle, thereby preventing the ECU from frequently adjusting the first angle between the first guide plate and the filter element, which could easily damage the first guide plate.

[0078] Step 502: The ECU determines the first angle between the first guide plate and the filter element in the air filter based on the current air flow, and controls the first guide plate to rotate to a position where it forms the first angle with the filter element.

[0079] Optionally, the ECU determines the first angle between the first air guide plate and the filter element inside the air filter, corresponding to the air flow rate, in the first preset diagram. The first preset diagram includes different air flow rates and their corresponding first angles; alternatively, a preset table can be used to express the correspondence between different air flow rates and their corresponding first angles.

[0080] After determining the first angle between the first guide plate and the filter element by referring to the table, the first guide plate is rotated to change the angle between it and the filter element. This allows the first guide plate to rotate to a position where it forms the first angle with the filter element. This prevents the airflow from flowing into the bottom of the first housing of the air filter and forming a vortex, allowing it to pass smoothly through the filter element along the first guide plate. This reduces the excessive pressure on the inner wall of the first housing of the air filter and improves the engine's intake efficiency.

[0081] See Figure 6 The ECU is also connected to the first drive assembly and the second drive assembly in the air filter;

[0082] The ECU controls the first guide plate to rotate to a position forming a first angle with the filter element, including: the ECU sending the first angle to the first drive assembly; the first drive assembly driving the first guide plate to rotate to a position forming a first angle with the filter element.

[0083] While the ECU determines the first angle between the first guide vane and the filter element in the air filter based on the current air flow, it also determines the second angle between the second guide vane and the filter element in the air filter and sends the second angle to the second drive assembly. The second drive assembly drives the second guide vane to rotate to a position where it forms the second angle with the filter element.

[0084] Here, when the first angle between the first guide plate and the filter element is determined by looking up a table, the second angle between the second guide plate and the filter element inside the air filter corresponding to the air flow rate is simultaneously determined by looking up a table in the first preset table. The first preset diagram also includes different air flow rates and their corresponding second angles. Alternatively, a preset table can be used to express the correspondence between different air flow rates and their corresponding first and second angles.

[0085] Before calibrating the first preset diagram, first set the target straight line for intake system resistance, see [link to relevant documentation]. Figure 7 Currently, under normal conditions, the resistance curve shows that resistance increases with increasing airflow. However, the resistance curve is not linear and can experience sudden increases. This results in significant pressure on the inner wall of the air filter as airflow increases, leading to low engine intake efficiency. Therefore, ideally, the pressure on the inner wall of the air filter should increase gradually as airflow increases. This embodiment incorporates a deflector to reduce the pressure on the inner wall of the air filter. During calibration, an air mass flow meter monitors the airflow rate drawn into the engine per unit time (i.e., the airflow rate exiting the air filter outlet) and feeds this airflow rate back to the ECU. The ECU determines a control signal based on the airflow rate and sends it to the first and second drive components. These components then dynamically guide the airflow into the air filter according to the control signal, achieving a dynamic resistance in the intake system that matches or approaches the target resistance line. Figure 7 The actual resistance curve ensures that the vehicle's intake efficiency remains at its optimal level.

[0086] The first and second included angles in the control signal are the included angles corresponding to the rotation of the first guide vane by the first drive component and the rotation of the second guide vane by the second drive component under the current airflow, so that the dynamic resistance of the intake system reaches or approaches the target resistance line corresponding to the intake system resistance target. This allows us to obtain the first and second included angles corresponding to different airflow rates, forming a first preset diagram, such as... Figure 8 As shown.

[0087] It should be noted that when the ECU detects that the engine is stopped, it determines that the first and second included angles are both zero, meaning that the first and second guide vanes are in contact with the filter element. (See [link to relevant documentation]). Figure 4The overlapping area of ​​the two guide vanes, together with the filter element, forms a relatively sealed structure to prevent hydrocarbons emitted during engine operation from entering the air filter through the air intake and from directly spreading into the atmosphere and polluting the air when the engine is stopped.

[0088] When the ECU detects that the engine is idling, it determines the first and second included angles as the set maximum included angles. (See below) Figure 9 When the engine is idling, the engine speed is low and the resonant frequency is low, which will generate low-frequency noise. At this time, it is necessary to ensure the volume of the air filter during the low-speed idling stage of the engine in order to reduce or eliminate low-frequency noise. Therefore, it is necessary to control the angle between the first and second guide vanes and the filter element to reach the maximum angle to ensure the volume of the air filter.

[0089] It should be noted that when sound-absorbing material is applied to the side of the first and second guide plates facing the filter element, low-frequency noise will be further reduced. However, when the engine is running, the sound-absorbing material will affect the airflow guiding effect of the guide plates. In this case, two methods can be used. The first method is to replace the first and / or second guide plates with straight plates if the first and / or second guide plates are folded plates to improve the airflow guiding effect. The second method is to set correction parameters. After determining the first and second included angles, the correction parameters are used to correct the first and second included angles respectively.

[0090] The correction parameters can be determined experimentally. Correcting the first and second included angles using the correction parameters can include: calculating the first difference between the first included angle and the correction parameters, and using the first difference as the corrected first included angle; calculating the second difference between the second included angle and the correction parameters, and using the second difference as the corrected second included angle, that is, further reducing the first and second included angles.

[0091] In this embodiment, the first and second angles calculated by the ECU are different depending on the airflow. Therefore, it is necessary to control the first and second drive components in real time according to the first and second angles in order to keep the vehicle's intake system at the best intake efficiency.

[0092] In the above-mentioned intake system control method, during engine operation, the ECU determines the first angle between the first guide plate and the filter element based on the air flow rate at the air filter outlet sent by the air mass flow meter. The first drive assembly drives the first guide plate to rotate to a position forming the first angle with the filter element. This allows the airflow entering from the intake port to be prevented from flowing into the bottom of the first housing of the air filter and forming a vortex under the action of the first guide plate. Instead, the airflow can smoothly pass through the filter element along the first guide plate, thereby reducing the excessive pressure on the inner wall of the first housing of the air filter and improving the engine intake efficiency. In addition, while the ECU determines the first angle between the first guide plate and the filter element in the air filter based on the current air flow, it also determines the second angle between the second guide plate and the filter element in the air filter. This causes the second drive assembly to drive the second guide plate to rotate to a position where it forms the second angle with the filter element. As a result, the airflow through the filter element flows smoothly into the air outlet along the second guide plate, thereby further reducing the excessive pressure on the inner wall of the second housing of the air filter and improving the engine intake efficiency.

[0093] It should be understood that the sequence number of each step in the above embodiments does not imply the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present invention.

[0094] This invention also provides a vehicle that includes an air filter as described in any of the above embodiments, and has the beneficial effects of the air filter described in any of the above embodiments.

[0095] The above-described embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention, and should all be included within the protection scope of the present invention.

Claims

1. An air filter, characterized in that, include: First housing, second housing, filter element, first guide plate, first drive assembly, second guide plate and second drive assembly; The first housing and the second housing are snapped together vertically, and an air inlet is provided on the first side of the first housing, and an air outlet is provided on the first side or the second side corresponding to the first side of the second housing. The filter element is located on the first housing and between the air inlet and the air outlet; One end of the first guide plate is disposed on the second side of the first housing and is located below the filter element near the air inlet; The first drive assembly is connected to one end of the first guide plate and is used to drive the first guide plate to rotate, so that the first included angle between the first guide plate and the filter element changes with the air flow rate in the first housing. One end of the second guide plate is disposed on the first side of the second housing and is located on the filter element near the air outlet. The second drive assembly is connected to one end of the second guide plate and is used to drive the second guide plate to rotate, so that the second included angle between the second guide plate and the filter element changes with the air flow rate in the second housing.

2. The air filter according to claim 1, characterized in that, The first drive assembly includes a first housing drive mechanism and a first rotating shaft; The rotating shaft of the first housing drive mechanism is fixedly connected to the first rotating shaft, and the first rotating shaft is fixedly connected to one end of the first guide plate; The second drive assembly includes a second housing drive mechanism and a second rotating shaft; The rotating shaft of the second housing drive mechanism is fixedly connected to the second rotating shaft, and the second rotating shaft is fixedly connected to one end of the second guide plate.

3. The air filter according to claim 2, characterized in that, The first guide plate and / or the second guide plate are straight plates or folded plates; The folding plate is composed of at least two straight plates that are movably connected.

4. The air filter according to claim 3, characterized in that, Sound-absorbing material is provided on one side of the first guide plate and / or the second guide plate corresponding to the filter element; The length of the first guide plate is greater than the difference between the length of the filter element and the length of the second guide plate.

5. A control method for an intake system, characterized in that, The air filter used in any one of claims 1-4 further includes an air mass flow meter and an ECU, wherein the air mass flow meter is disposed at the air outlet of the air filter and connected to the ECU, and the control method of the intake system includes: During engine operation, the ECU receives the air flow rate monitored in real time by the air mass flow meter; The ECU determines the first angle between the first guide plate and the filter element in the air filter based on the current air flow, and controls the first guide plate to rotate to a position where it forms the first angle with the filter element.

6. The control method for the intake system according to claim 5, characterized in that, The ECU is also connected to the first drive component and the second drive component in the air filter; The ECU controls the first guide vane to rotate to a position forming a first angle with the filter element, including: The ECU sends the first angle to the first drive assembly; the first drive assembly drives the first guide plate to rotate to a position forming the first angle with the filter element; Also includes: While the ECU determines the first angle between the first guide plate and the filter element in the air filter based on the current air flow, it also determines the second angle between the second guide plate and the filter element in the air filter and sends the second angle to the second drive assembly. The second drive assembly drives the second guide plate to rotate to a position forming a second angle with the filter element.

7. The control method for the intake system according to claim 6, characterized in that, Also includes: When the ECU detects that the engine is in a stopped state, it determines that the first included angle and the second included angle are both zero. When the ECU detects that the engine is idling, it determines that the first angle and the second angle are the set maximum angles.

8. A vehicle, characterized in that, The air filter includes any one of claims 1 to 4 above.

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