Engine intake system and vehicle

Abstract

This application relates to the field of vehicle engine technology and provides an engine intake system and a vehicle, comprising: a first filter device having a first intake chamber and a first outlet chamber; a second filter device disposed on the first filter device and having a second intake chamber and a second outlet chamber, wherein the second outlet chamber is connected to the first outlet chamber; and an intake assembly having an intake port that is connected and cooperates with the first intake chamber and the second intake chamber respectively, wherein the intake port is selectively connected to the first intake chamber and the second intake chamber. Therefore, the operational reliability of the engine intake system can be guaranteed, and even if one set of filters fails, the air supply demand on the engine side can still be met, ensuring the smooth operation of the vehicle.

Description

Technical Field

[0001] This application relates to the field of vehicle engine technology, and in particular to an engine intake system and a vehicle. Background Technology

[0002] Currently, the engine intake system uses an air filter to filter sand and dust particles in the air, so as to deliver air free of sand and other solid particles to the engine side.

[0003] In related technologies, air filters use filter elements (such as multi-layer fiber filter paper structures) to intercept dust particles in the air. If the air filter is overloaded, the filter material of the filter element may break, causing dust particles to enter the combustion chamber through the damaged filter material. This can lead to abrasive wear between the piston rings and cylinder walls of the engine, resulting in problems such as cylinder scoring. Utility Model Content

[0004] In view of this, this application aims to provide an engine intake system having two sets of filter devices, which can improve the operational reliability of the engine intake system and ensure the filtration effect of the engine intake system on air.

[0005] To achieve the above objectives, the technical solution of this application is implemented as follows: An engine intake system includes: a first filter device having a first intake chamber and a first exhaust chamber; a second filter device disposed on the first filter device and having a second intake chamber and a second exhaust chamber, wherein the second exhaust chamber is connected to the first exhaust chamber; and an intake assembly having an intake port that is connected to and cooperates with the first intake chamber and the second intake chamber respectively, wherein the intake port is selectively connected to the first intake chamber and the second intake chamber.

[0006] According to some embodiments of this application, the air intake assembly includes: a first air intake pipe, one end of which forms the air intake port, and the other end of which is connected to the first filter device and communicates with the first air intake chamber; and a second air intake pipe, which is connected between the first air intake pipe and the second filter device, and the air intake side of the second air intake pipe communicates with the interior of the first air intake pipe, and the air outlet side of the second air intake pipe communicates with the second air intake chamber.

[0007] According to some embodiments of this application, the intake assembly further includes: a first control valve, which is disposed in the first intake pipe and is used to control the opening and closing of the first intake pipe; and a second control valve, which is disposed in the second intake pipe and is used to control the opening and closing of the second intake pipe.

[0008] According to some embodiments of this application, the first intake pipe includes: a first pipe segment forming the air inlet and communicating with the second intake pipe; a second pipe segment connecting the first pipe segment and the first intake chamber and being arranged in parallel with the second intake pipe, and the first control valve being disposed in the second pipe segment.

[0009] According to some embodiments of this application, the first filtering device includes: a first upper housing and a first lower housing, the first upper housing and the first lower housing forming a first cavity, and the first air inlet pipe being connected to the first lower housing; and a first filter element, the first filter element being disposed in the first cavity and adapted to divide the first air inlet cavity and the first air outlet cavity within the first cavity.

[0010] According to some embodiments of this application, the second filtration device includes: a second upper housing and a second lower housing, the second upper housing and the second lower housing being connected to form a second cavity, and the second air inlet pipe being connected and engaged with the second lower housing; and a second filter element disposed within the second cavity.

[0011] According to some embodiments of this application, the second upper housing is disposed on the first upper housing and together with the first upper housing surrounds the upper side of the second filter element to form the second air outlet cavity, and the first upper housing is formed with a communicating hole connecting the second air outlet cavity and the first air outlet cavity; the second lower housing is disposed on the first lower housing and together with the first lower housing surrounds the lower side of the second filter element to form the second air inlet cavity.

[0012] According to some embodiments of this application, the first filtration device further includes a valve structure disposed at the first lower housing and used to allow the first filter element to filter and separate solid particles in the first air inlet chamber for discharge.

[0013] According to some embodiments of this application, the first filtering device further includes a piezoelectric sensor, which is disposed in the first upper housing and located in the first air outlet cavity, and is used to monitor and acquire piezoelectric signals.

[0014] Compared with the prior art, the engine intake system described in this application has the following advantages: (1) The engine intake system is equipped with two sets of filter devices, namely the first filter device and the second filter device, which can ensure the reliability of the engine intake system. Even if one filter device fails, the air supply demand of the engine side can still be met, ensuring the smooth operation of the vehicle. (2) The first filter device and the second filter device are closely matched, which can improve the space utilization of the engine intake system and help save the number of components in the engine intake system. (3) A piezoelectric sensor is installed in the engine intake system, which can control the operating status of the engine intake system based on the monitoring signal of the piezoelectric sensor to ensure the air filtration effect of the engine intake system.

[0015] Another objective of this application is to propose a vehicle.

[0016] To achieve the above objectives, the technical solution of this application is implemented as follows: A vehicle comprising the engine intake system described above.

[0017] The advantages of the vehicle and the aforementioned engine intake system compared to existing technologies are the same and will not be repeated here. Attached Figure Description

[0018] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments and descriptions of this application are used to explain this application and do not constitute an undue limitation of this application. In the drawings: Figure 1 This is a schematic diagram of the structure of an engine intake system according to one embodiment of this application. Figure 1 ; Figure 2 This is a schematic diagram of the structure of an engine intake system according to one embodiment of this application. Figure 2 ; Figure 3 This is a top view schematic diagram of an engine intake system according to one embodiment of this application; Figure 4 for Figure 3 Sectional view at centerline AA; Figure 5 This is a bottom view schematic diagram of an engine intake system according to an embodiment of this application.

[0019] Explanation of reference numerals in the attached figures: Engine intake system 100; First filter device 1; first air inlet chamber 101; first air outlet chamber 102; first upper housing 11; first lower housing 12; first filter element 13; Second filter device 2; second air inlet chamber 201; second air outlet chamber 202; second upper housing 21; second lower housing 22; second filter element 23 Air intake assembly 3; air intake port 301; first air intake pipe 31; first pipe section 311; second pipe section 312; second air intake pipe 32; First control valve 331; second control valve 332; valve structure 4; exhaust assembly 5. Detailed Implementation

[0020] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other.

[0021] The engine intake system 100 of this application will now be described in detail with reference to the accompanying drawings and embodiments. The engine intake system 100 is applied to a vehicle and can deliver filtered air to the engine side to meet the engine's operating requirements.

[0022] It should be noted that currently, the engine intake system 100 filters sand and dust particles in the air through an air filter to deliver air that does not contain sand or other solid particles to the engine side.

[0023] In related technologies, air filters use filter elements (such as multi-layer fiber filter paper structures) to intercept dust particles in the air. If the air filter is overloaded, the filter material of the filter element may break, causing dust particles to enter the combustion chamber through the damaged filter material. This can lead to abrasive wear between the piston rings and cylinder walls of the engine, resulting in problems such as cylinder scoring.

[0024] An engine intake system 100 according to an embodiment of this application includes: a first filter device 1, a second filter device 2, and an intake assembly 3.

[0025] The first filter device 1 has a first air inlet chamber 101 and a first air outlet chamber 102. The second filter device 2 is disposed on the first filter device 1 and has a second air inlet chamber 201 and a second air outlet chamber 202. The second air outlet chamber 202 of the second filter device 2 is connected to the first air outlet chamber 102.

[0026] Furthermore, the air intake assembly 3 has an air inlet 301, which allows the air intake assembly 3 to communicate with the external atmospheric environment. Air from the external environment can enter the air intake assembly 3 through the air inlet 301. The air intake assembly 3 is also connected and cooperates with the first air intake chamber 101 and the second air intake chamber 201, so that the air intake assembly 3 can supply air to the first air intake chamber 101 and the second air intake chamber 201. The air inlet 301 can be selectively connected to the first air intake chamber 101 and the second air intake chamber 201, so that air can be selectively supplied to at least one of the first air intake chamber 101 and the second air intake chamber 201 according to the filtration requirements, so as to filter the air through at least one of the first air intake chamber 101 and the second air intake chamber 201.

[0027] Specifically, when the air inlet 301 is connected to the first air intake chamber 101, air from the outside environment can be transported to the first filter device 1 via the air intake assembly 3 for filtration. When the air inlet 301 is connected to the second air intake chamber 201, air from the outside environment can be transported to the second filter device 2 via the air intake assembly 3 for filtration. Thus, air can be filtered by both the first filter device 1 and the second filter device 2.

[0028] Understandably, the engine intake system 100 is used to deliver filtered air to the engine side to meet the engine's operating requirements. (Refer to...) Figure 1 As shown, the engine intake system 100 is also provided with an exhaust assembly 5. The exhaust assembly 5 is used to connect the exhaust side of the engine intake system 100 (i.e., the first exhaust chamber 102 and the second exhaust chamber 202) with the engine side so as to deliver filtered air to the engine through the exhaust assembly 5. The exhaust assembly 5 can be connected to one of the first filter device 1 and the second filter device 2.

[0029] When the exhaust assembly 5 is connected to the first filter device 1, the exhaust assembly 5 communicates with the first exhaust chamber 102; when the exhaust assembly 5 is connected to the second filter device 2, the exhaust assembly 5 communicates with the second exhaust chamber 202. Because the first exhaust chamber 102 and the second exhaust chamber 202 are connected and cooperate, the exhaust assembly 5 can communicate with either the first exhaust chamber 102 or the second exhaust chamber 202 to enable the first filter device 1 and the second filter device 2 to deliver filtered air to the engine side.

[0030] It should be noted that currently, the engine intake system 100 filters the air using only one set of filters, which results in a large load on this set of filters. Furthermore, if this set of filters is damaged, the engine intake system 100 will not be able to effectively filter the air, and there is a risk that solid particles (such as sand) will enter the engine and cause problems such as cylinder scoring.

[0031] In the engine intake system 100 of this application embodiment, a first filter device 1 and a second filter device 2 are provided. Both the first filter device 1 and the second filter device 2 can cooperate with the intake assembly 3 to filter the air. When the first filter device 1 and the second filter device 2 work at the same time, the load-bearing performance of the engine intake system 100 can be improved, thereby improving the air filtration efficiency of the engine intake system 100. Even if one of the filter devices (i.e., one of the first filter device 1 and the second filter device 2) is damaged, the air can still be filtered by the other filter device (i.e., the other of the first filter device 1 and the second filter device 2) to ensure the air delivery effect to the engine side and meet the engine's operating requirements.

[0032] It is understood that when the engine intake system 100 of this embodiment filters outside air, it can filter the air only through the first filter device 1 and deliver the filtered air to the engine side. At this time, the second intake chamber 201 of the second filter device 2 is not connected to the intake port 301. That is, the air entering the intake assembly 3 through the intake port 301 only flows through the first filter device 1, and the second filter device 2 is not connected to the intake assembly 3. When the first filter element 13 in the first filter device 1 is damaged, the connection between the first intake chamber 101 and the intake port 301 can be disconnected, and the second intake chamber 201 can be connected to the intake port 301 to filter the air. This ensures the air delivery effect of the engine intake system 100 to the engine side and guarantees the operational reliability and stability of the engine side. As a result, the fault tolerance of the engine intake system 100 can be improved. Even if the first filter device 1 is damaged, air filtration can still be achieved through the second filter device 2 to meet the engine's operating requirements.

[0033] Combination Figure 1 and Figure 2 As shown, in some embodiments of this application, the air intake assembly 3 includes: a first air intake pipe 31 and a second air intake pipe 32.

[0034] The first intake pipe 31 has an intake port 301 at one end and is connected to the first filter device 1 at the other end. The first intake pipe 31 is also connected to the first intake chamber 101. The second intake pipe 32 is connected between the first intake pipe 31 and the second filter device 2. The intake side of the second intake pipe 32 is connected to the interior of the first intake pipe 31, and the exhaust side of the second intake pipe 32 is connected to the second intake chamber 201, so that the second intake pipe 32 can be connected to the intake port 301 through the first intake pipe 31.

[0035] Specifically, both the first intake pipe 31 and the second intake pipe 32 are connected to the external environment through the intake port 301. That is, the first intake chamber 101 can be connected to the external environment through the first intake pipe 31, and the second intake chamber 201 can be connected to the external environment through the first intake pipe 31 and the second intake pipe 32, so that outside air can enter the intake assembly 3 through the intake port 301, and be transported to the first intake chamber 101 through the first intake pipe 31 and to the second intake chamber 201 through the second intake pipe 32.

[0036] In a further embodiment of this application, the intake assembly 3 further includes a first control valve 331 and a second control valve 332. The first control valve 331 is disposed at the first intake pipe 31 and is used to control the opening and closing of the first intake pipe 31. The second control valve 332 is disposed at the second intake pipe 32 and is used to control the opening and closing of the second intake pipe 32. Thus, the opening and closing states of the first control valve 331 and the second control valve 332 can be controlled according to the intake requirements of the engine intake system 100.

[0037] Specifically, when the engine intake system 100 only requires the first filter device 1 to filter the air, the first control valve 331 is open and the second control valve 332 is closed. The first intake pipe 31 connects the first intake chamber 101 and the intake port 301. Air from the outside environment can enter the first intake pipe 31 through the intake port 301 and flow into the first intake chamber 101 to be filtered by the first filter device 1. When the engine intake system 100 requires the first filter device 1 and the second filter device 2 to filter the air simultaneously, both the first control valve 331 and the second control valve 332 are open. The first intake pipe 31 connects the first intake chamber 101 and the intake port 301, and the second intake pipe 32 connects the second intake chamber 201 and the first intake pipe 31. Air from the outside environment can enter the first intake pipe 31 through the intake port 301 and flow into the first intake chamber 101 and the second intake chamber 201 respectively to be filtered by the first filter device 1 and the second filter device 2.

[0038] Combination Figure 1 and Figure 2 As shown, in a further embodiment of this application, the first intake pipe 31 includes: a first pipe section 311 and a second pipe section 312. The first pipe section 311 forms the aforementioned air inlet 301 and is connected to the second intake pipe 32. The second pipe section 312 is connected between the first pipe section 311 and the first intake chamber 101, and the second pipe section 312 and the second intake pipe 32 are arranged in parallel with the first pipe section 311. Moreover, the first control valve 331 is disposed in the second pipe section 312.

[0039] Specifically, the first pipe section 311 is constantly connected to the external environment through the air inlet 301, and the on / off devices of the second pipe section 312 and the second air inlet pipe 32 can be independently controlled, so that the second pipe section 312 and the second air inlet pipe 32 can be selectively connected to the first pipe section 311, so as to selectively connect the first air inlet chamber 101 and the second air inlet chamber 201 to the external environment according to the filtration requirements.

[0040] It is understandable that when the first control valve 331 is opened, the first air intake chamber 101 can be connected to the first pipe section 311 through the second pipe section 312 to connect the first air intake chamber 101 to the external environment; when the second control valve 332 is opened, the second air intake chamber 201 can be connected to the first pipe section 311 through the second air intake pipe 32 to connect the second air intake chamber 201 to the external environment. Therefore, the engine intake system 100 can filter air using only one set of filters (i.e., one of the first filter 1 and the second filter 2), thus reserving one set of filters for special operating conditions. For example, under normal operating conditions, the engine intake system 100 filters air using only the first filter 1, and the second control valve 332 is usually closed (i.e., the second filter 2 is not connected to the air intake port 301). If the first filter 1 malfunctions (e.g., the filter paper is damaged) and cannot effectively filter solid particles in the air, the first control valve 331 is closed and the second control valve 332 is opened. In this case, the air is filtered only using the second filter 2 to meet the air supply requirements to the engine side.

[0041] It should be noted that valve plates may be provided in the first control valve 331 and the second control valve 332, and the valve plates may be flipped in the pipeline structure to achieve pipeline opening and closing control by driving the valve plate to move. However, the specific structure of the first control valve 331 and the second control valve 332 is not limited to this, and the specific structure of the first control valve 331 and the second control valve 332 is not limited here.

[0042] Combination Figure 1 and Figure 4 As shown, in some embodiments of this application, the first filter device 1 includes: a first upper housing 11 and a first lower housing 12, the first upper housing 11 and the first lower housing 12 enclose a first cavity, and the first air inlet pipe 31 is connected to the first lower housing 12. The first filter element 13 is disposed in the first cavity, and the first filter element 13 can be divided in the first cavity to form a first air inlet chamber 101 and a first air outlet chamber 102, so that the air in the first air inlet chamber 101 needs to enter the first air outlet chamber 102 after flowing through the first filter element 13, so as to realize the filtering function of the first filter device 1.

[0043] The first upper housing 11 and the first lower housing 12 are vertically fastened together to form a first cavity. The first filter element 13 is located in the middle of the first cavity in the vertical direction. The first air inlet pipe 31 is connected to the first air inlet chamber 101 located at the bottom. The air in the first air inlet chamber 101 flows from bottom to top to the first air outlet chamber 102 so that the air can be fully filtered by the first filter element 13, ensuring the filtration effect of the first filter device 1.

[0044] In a further embodiment of this application, the second filter device 2 includes: a second upper housing 21, a second lower housing 22, and a second filter element 23. The second upper housing 21 and the second lower housing 22 are connected to the first filter device 1 and enclose to form a second cavity. The second intake pipe 32 is connected and cooperates with the second lower housing 22. The second filter element 23 is disposed in the second cavity, thereby arranging the first filter device 1 and the second filter device 2 adjacent to each other. This can improve the space utilization of the engine intake system 100 while integrating two sets of filter devices in the engine intake system 100.

[0045] Combination Figure 1 , Figure 2 and Figure 4 As shown, the second upper housing 21 and the second lower housing 22 are installed on the outer casing of the first filter device 1 (i.e., the first upper housing 11 and the first lower housing 12), so that the second filter device 2 can be arranged close to the first filter device 1. At the same time, the second filter element 23 is disposed in the second cavity, so as to form a second air intake chamber 201 and a second air outlet chamber 202 in the second filter device 2 by separating the second air intake chamber 201 through the second filter element 23. The air in the second air intake chamber 201 needs to enter the second air outlet chamber 202 after flowing through the second filter element 23, and then be further discharged to the engine side to realize the filtering function of the second filter device 2.

[0046] The second cavity can be defined by the second upper housing 21, the second lower housing 22 and the outer shell of the first filter device 1, so that the outer shell of the first filter device 1 is constructed as a partial wall surface defining the second cavity, and the second upper housing 21 and the second lower housing 22 can be fixedly installed on the outer shell of the first filter device 1.

[0047] In some embodiments of this application, a second upper housing 21 is disposed on a first upper housing 11, and the second upper housing 21 and the first upper housing 11 enclose the upper side of the second filter element 23 to form a second air outlet chamber 202. A second lower housing 22 is disposed on a first lower housing 12, and the second lower housing 22 and the first lower housing 12 enclose the lower side of the second filter element 23 to form a second air inlet chamber 201.

[0048] Furthermore, the first upper housing 11 has a connecting hole (not shown) that connects the second exhaust chamber 202 and the first exhaust chamber 102, thereby enabling the first exhaust chamber 102 and the second exhaust chamber 202 to communicate. Only one set of exhaust components 5 is required to meet the needs of the engine intake system 100 to deliver gas to the engine side, thereby saving the number of components required in the engine intake system 100.

[0049] It is understood that the exhaust assembly 5 can be installed on one of the first upper housing 11 and the second upper housing 21 to exhaust air from the first exhaust chamber 102 and the second exhaust chamber 202 to the engine side.

[0050] Combination Figure 2 and Figure 5 As shown, in some embodiments of this application, the first filter device 1 further includes a valve structure 4, which is disposed at the first lower housing 12, and the first filter device 1 is used to filter and separate solid particles in the first air inlet chamber 101 by the first filter element 13 and discharge them.

[0051] It should be noted that in the first filter device 1, air enters the first air outlet chamber 102 after passing through the first filter element 13 from the first air intake chamber 101, and is discharged towards the engine side from the first air outlet chamber 102. During the air filtration process by the first filter device 1, solid particles mixed in the air will be filtered out of the first air intake chamber 101 by the filtering action of the first filter element 13. In other words, solid particles cannot pass through the first filter element 13 to enter the engine side, thereby confining the solid particles in the first air intake chamber 101.

[0052] The solid particles mentioned above may include, but are not limited to, dust, sand, etc. The first filter element 13 may be made of filter paper or non-woven fabric and other materials to intercept solid particles such as dust, sand, and pollen in the air to prevent them from entering the combustion chamber of the engine and avoid accelerating the wear of components such as pistons and cylinders.

[0053] It is understandable that solid particles in the air filtered by the first filter device 1 will be collected and confined in the first air intake chamber 101. If the amount of solid particles is large, a large number of pollutants will adhere to the first filter element 13, thus affecting the filtration effect of the first filter device 1. In this application, a valve structure 4 is provided at the first lower housing 12. The valve structure 4 allows solid particles in the first air intake chamber 101 to be discharged, so as to avoid solid particles and other pollutants from remaining in the first air intake chamber 101.

[0054] In a further embodiment of this application, the first lower housing 12 is formed with a guide slope, which can guide solid particles in the first air intake chamber 101 to the valve structure 4, so that the solid particles can be discharged from the first air intake chamber 101 through the valve structure 4. Preferably, the valve structure 4 is disposed on the bottom wall of the first lower housing 12, and the valve structure 4 is disposed near the lower end of the guide slope.

[0055] In some embodiments of this application, the first filter device 1 further includes a piezoelectric sensor disposed at the first upper housing 11 and within the first air outlet chamber 102. The piezoelectric sensor is used to monitor and obtain piezoelectric signals.

[0056] It should be noted that the piezoelectric sensor is set to a specific frequency analysis range to detect the high-frequency impact of sand particles in the first air outlet chamber 102. This allows for real-time monitoring of the first filter device 1 based on the signal obtained by the piezoelectric sensor, to determine whether a fault has occurred at the first filter element 13 (e.g., damage, filter failure). This enables control of the operating status of the engine intake system 100. For example, if the intensity of the piezoelectric signal monitored by the piezoelectric sensor reaches a preset threshold γ and the duration reaches a preset time T0, it is determined that the first filter device 1 has failed. The first control valve 331 is then closed and the second control valve 332 is opened, so that the air no longer passes through the first filter device 1 for filtration. The second control valve 332 is then opened to allow the air to pass through the second filter device 2 for filtration. This ensures the quality of the air delivered by the engine intake system 100 to the engine side while meeting the engine's operating requirements.

[0057] Understandably, when the engine intake system 100 is used in a vehicle, the piezoelectric sensor can be connected to the vehicle's controller. The vehicle controller can then control the corresponding warning light in the instrument panel to illuminate based on the monitoring signal from the piezoelectric sensor, so as to remind the user to perform timely maintenance and repair of the engine intake system 100.

[0058] The engine intake system 100 according to the embodiments of this application has at least the following advantages: (1) The engine intake system 100 is equipped with two sets of filter devices, namely the first filter device 1 and the second filter device 2, so as to ensure the reliability of the engine intake system 100. Even if one filter device fails, the air supply demand of the engine side can still be met, ensuring the smooth operation of the vehicle. (2) The first filter device 1 and the second filter device 2 are closely matched, which can improve the space utilization of the engine intake system 100 and help save the number of components in the engine intake system 100. (3) The engine intake system 100 is equipped with a piezoelectric sensor, which can control the operating status of the engine intake system 100 based on the monitoring signal of the piezoelectric sensor, so as to ensure the air filtration effect of the engine intake system 100.

[0059] According to an embodiment of this application, the vehicle includes the engine intake system 100 described above.

[0060] The advantages of the vehicle compared to the prior art are the same as those of the engine intake system 100 mentioned above, and will not be repeated here.

[0061] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0062] In the description of this application, "first feature" and "second feature" may include one or more of the features.

[0063] In the description of this application, "multiple" means two or more.

[0064] In the description of this application, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or the first and second features being in contact through another feature between them.

[0065] In the description of this application, the terms "above," "over," and "on top" for the first feature and the second feature include the first feature being directly above or diagonally above the second feature, or simply indicate that the first feature is at a higher horizontal level than the second feature.

[0066] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0067] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. An engine air intake system characterized by, include: The first filter device (1) has a first air inlet chamber (101) and a first air outlet chamber (102). The second filter device (2) is disposed on the first filter device (1) and has a second air inlet chamber (201) and a second air outlet chamber (202), and the second air outlet chamber (202) is connected to the first air outlet chamber (102); An air intake assembly (3) has an air inlet (301) and communicates with the first air intake chamber (101) and the second air intake chamber (201) respectively, and the air inlet (301) can be selectively communicated with the first air intake chamber (101) and the second air intake chamber (201).

2. The engine air intake system of claim 1, wherein, The intake assembly (3) includes: The first air intake pipe (31) has one end forming the air inlet (301), and the other end of the first air intake pipe (31) is connected to the first filter device (1) and communicates with the first air intake chamber (101). The second air intake pipe (32) is connected between the first air intake pipe (31) and the second filter device (2), and the air intake side of the second air intake pipe (32) is connected to the interior of the first air intake pipe (31), and the air outlet side of the second air intake pipe (32) is connected to the second air intake chamber (201).

3. The engine air intake system of claim 2, wherein, The intake assembly (3) also includes: The first control valve (331) is located in the first air intake pipe (31) and is used to control the opening and closing of the first air intake pipe (31); The second control valve (332) is located in the second air intake pipe (32) and is used to control the opening and closing of the second air intake pipe (32).

4. The engine air intake system of claim 3, wherein, The first intake pipe (31) includes: The first pipe section (311) forms the air inlet (301) and is connected to the second air inlet pipe (32); The second pipe section (312) is connected between the first pipe section (311) and the first air intake chamber (101) and is arranged in parallel with the second air intake pipe (32), and the first control valve (331) is located in the second pipe section (312).

5. The engine intake system according to claim 2, characterized in that, The first filter device (1) includes: The first upper shell (11) and the first lower shell (12) are connected to form a first cavity, and the first air inlet pipe (31) is connected to the first lower shell (12). The first filter element (13) is disposed in the first cavity and is adapted to divide the first air inlet cavity (101) and the first air outlet cavity (102) within the first cavity.

6. The engine intake system according to claim 5, characterized in that, The second filter device (2) includes: The second upper housing (21) and the second lower housing (22) are connected to the first filter device (1) and enclose to form a second cavity, and the second air inlet pipe (32) is connected and cooperates with the second lower housing (22); The second filter element (23) is disposed in the second cavity.

7. The engine intake system according to claim 6, characterized in that, The second upper housing (21) is disposed on the first upper housing (11) and together with the first upper housing (11) surrounds the second filter element (23) to form the second air outlet chamber (202). The first upper housing (11) has a connecting hole that connects the second air outlet chamber (202) and the first air outlet chamber (102). The second lower housing (22) is disposed on the first lower housing (12) and together with the first lower housing (12) surrounds the second air intake chamber (201) on the lower side of the second filter element (23).

8. The engine intake system according to claim 5, characterized in that, The first filter device (1) further includes a valve structure (4), which is located at the first lower housing (12) and is used to allow the first filter element (13) to filter and separate solid particles in the first air inlet chamber (101) for discharge.

9. The engine intake system according to claim 5, characterized in that, The first filter device (1) further includes a piezoelectric sensor, which is disposed in the first upper housing (11) and located in the first air outlet chamber (102), and is used to monitor and acquire piezoelectric signals.

10. A vehicle, characterized in that, Includes the engine intake system according to any one of claims 1-9.

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