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. The engine intake system includes: an air filter body with an intake chamber; an intake manifold assembly including: a swirl section with a guide section inside, which centrifugally guides the gas flowing through the swirl section to the inner peripheral wall side of the swirl section; a separation section connected to the exhaust side of the swirl section and used to separate solid particles in the gas flowing through the separation section, and the exhaust side of the separation section is connected to the intake chamber; and a collection assembly installed on the separation section and forming a collection chamber connected to the interior of the separation section, which is used to collect solid particles. This achieves preliminary separation of solid particles in the air at the intake manifold assembly, thereby reducing the solid particle content in the air delivered to the intake chamber, reducing the load on the air filter body, and helping to extend the service life of the main filter element in the air filter body.

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 intercept airborne dust particles through filter elements (such as multi-layer fiber filter paper structures). This means the air filter only filters dust particles at the filter element, resulting in a high load on that area. If the air filter operates under overload, the filter media may rupture, allowing dust particles to enter the combustion chamber through the damaged media. This can cause abrasive wear between the piston rings and cylinder walls, leading to problems such as cylinder scoring and seal failure. Utility Model Content

[0004] In view of this, this application aims to provide an engine intake system to improve the separation effect of solid particles in the air at the engine intake system and ensure the intake quality on the engine side.

[0005] To achieve the above objectives, the technical solution of this application is implemented as follows: An engine intake system includes: an air filter body having an intake chamber; an intake pipe assembly including: a swirl section having a guide portion therein, the guide portion centrifugally guiding gas flowing through the swirl section toward the inner peripheral wall of the swirl section; a separation section connected to the exhaust side of the swirl section and used to separate solid particles in the gas flowing through the separation section, the exhaust side of the separation section communicating with the intake chamber; and a collection assembly installed in the separation section and having a collection chamber communicating with the interior of the separation section, the collection chamber being used to collect the solid particles.

[0006] According to some embodiments of this application, the separation pipe section includes at least one annular separation section connected to the exhaust side of the swirl pipe section, and the inner wall of the annular separation section is formed with an arc-shaped groove that is recessed radially outward.

[0007] According to some embodiments of this application, the annular separation section includes: a first annular separation section, the air inlet side of the first annular separation section being connected to the exhaust side of the swirl tube section; and a second annular separation section, the second annular separation section being connected to the exhaust side of the first annular separation section, and the maximum radial dimension of the second arcuate groove of the second annular separation section being greater than the maximum radial dimension of the first arcuate groove of the first annular separation section.

[0008] According to some embodiments of this application, the intake pipe assembly further includes a transition pipe section, which connects the exhaust side of the swirl pipe section and the intake side of the separation pipe section, and the opening cross-sectional size of the transition pipe section gradually decreases from the intake side to the exhaust side.

[0009] According to some embodiments of this application, the separation pipe section is provided with a through hole that penetrates the pipe wall, the collection assembly is connected to the circumferential outer side of the separation pipe section, and the open end of the collection cavity is disposed opposite to the through hole.

[0010] According to some embodiments of this application, the collection assembly includes: a collection box connected to the bottom of the separation pipe section and forming a collection cavity open to one side of the separation pipe section; and a valve disposed on the bottom wall of the collection box, the valve being selectively opened to communicate the collection cavity with the outside of the collection box.

[0011] According to some embodiments of this application, the guide portion is constructed as a guide vane, one end of which is connected to the inner wall of the swirl tube section and extends toward the air inlet side of the swirl tube section near the central axis of the swirl tube section.

[0012] According to some embodiments of this application, there are multiple guide vanes, and the multiple guide vanes are arranged at intervals around the central axis of the swirl tube section.

[0013] According to some embodiments of this application, the intake pipe assembly further includes: an intake pipe section having an intake port, and the exhaust side of the intake pipe section communicating with the intake side of the swirl pipe section; and / or, an exhaust pipe section having the exhaust side of the exhaust pipe section communicating with the intake chamber, and the intake side of the exhaust pipe section communicating with the exhaust side of the separation pipe section.

[0014] Compared to existing technologies, the engine intake system described in this application has the following advantages: (1) The intake pipe assembly is provided with a swirl pipe section and a separation pipe section. The swirl pipe section can guide the air centrifugally to guide the solid particles mixed in the air to the wall of the pipe section. The separation pipe section can constrain the solid particles in the arc groove to separate the solid shell from the air, thereby reducing the content of solid particles in the air delivered to the air filter body, which helps to reduce the load on the air filter body and extend the service life of the main filter element in the air filter body. (2) Multiple annular separation sections are formed at the separation pipe section to achieve step-by-step flow and deposition of solid particles at the separation pipe section, thereby achieving efficient graded interception of solid particles, and the separated solid particles can be directionally stored in the collection component.

[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; Figure 6 for Figure 5 Sectional view at the center line BB; Figure 7 for Figure 6 A magnified view of the area circled at point C.

[0019] Explanation of reference numerals in the attached figures: Engine intake system 100; Air filter body 1; air inlet chamber 101; air outlet chamber 102; lower shell of the main body 11; sand discharge hole 111; upper shell of the main body 12; main filter element 13; sand discharge valve 14; Intake pipe assembly 2; swirl pipe section 21; guide section 211; guide vane 2111; separation pipe section 22; first annular separation section 221; second annular separation section 222; through hole 223; transition pipe section 23; intake pipe section 24; exhaust pipe section 25; Collection component 3; collection chamber 301; collection box 31; exhaust pipe assembly 4. 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 used to supply air to one side of the engine 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 intercept airborne dust particles through filter elements (such as multi-layer fiber filter paper structures). This means the air filter only filters dust particles at the filter element, resulting in a high load on that area. If the air filter operates under overload, the filter media may rupture, allowing dust particles to enter the combustion chamber through the damaged media. This can cause abrasive wear between the piston rings and cylinder walls, leading to problems such as cylinder scoring and seal failure.

[0024] An engine intake system 100 according to an embodiment of this application includes: an air filter body 1, an intake pipe assembly 2, and a collection assembly 3.

[0025] Specifically, the air filter body 1 forms an air intake chamber 101, and the air intake pipe assembly 2 can deliver air to the side of the air intake chamber 101. The air filter body 1 can filter the air to remove particles such as sand and dust mixed in the air, ensuring the quality of gas delivery to the engine side.

[0026] Furthermore, the intake pipe assembly 2 includes a swirl pipe section 21 and a separation pipe section 22. The swirl pipe section 21 is provided with a guide section 211, which can centrifugally guide the gas flowing through the swirl pipe section 21 toward the inner peripheral wall side of the swirl pipe section 21. The separation pipe section 22 is connected to the exhaust side of the swirl pipe section 21. The air discharged after passing through the swirl pipe section 21 can enter the separation pipe section 22. The swirl pipe section 21 is used to separate solid particles in the gas flowing through the separation pipe section 22 to separate the solid shell from the air. The exhaust side of the separation pipe section 22 is connected to the intake chamber 101, so that the air flowing through the separation pipe section 22 can flow into the intake chamber 101.

[0027] It should be noted that the density of solid particles is greater than that of gas, which makes the mass of solid particles of the same volume greater than that of gas. As a result, the inertia of solid particles is greater than that of gas in the air. Under the centrifugal guiding effect of the separation tube section 22, solid particles in the air can be fully guided to the position near the inner peripheral wall of the cyclone tube section 21, so that the solid shell will be further transported downstream (i.e., the exhaust side of the cyclone tube section 21) along the wall of the cyclone tube section 21.

[0028] It is understandable that when air flows through the swirl tube section 21, solid particles mixed in the air (such as sand) can be guided to the wall of the swirl tube section 21 by the guide section 211. The air discharged through the swirl tube section 21 can be transported to the separation tube section 22. The solid particles mixed in the air entering the separation tube section 22 are located near the inner peripheral wall of the separation tube section 22. The separation tube section 22 can separate the solid particles mixed in the air flowing through the separation tube section 22 from the air, thereby reducing the content of solid particles mixed in the air transported to the air intake chamber 101 side. This helps to reduce the filtration load at the air filter body 1, further improves the air filtration effect of the air filter body 1, and reduces the risk of damage or failure of the air filter body 1 due to overload operation.

[0029] Combination Figure 1 and Figure 4 As shown, the collection component 3 cooperates with the air intake pipe component 2 to install the collection component 3 at the separation pipe section 22, and the collection component 3 forms a collection cavity 301 that communicates with the interior of the separation pipe section 22. The collection cavity 301 is used to collect solid particles separated from the air by the separation pipe section 22, thereby realizing the collection of solid particles filtered and separated from the air.

[0030] The collection component 3 has a collection chamber 301, which is connected to the internal space of the separation pipe section 22. Solid particles separated by the separation pipe section 22 can enter the collection chamber 301 to be collected by the collection component 3. This prevents pollutants (such as sand) in the external environment from entering the air intake pipe component 2 through the connection between the separation pipe section 22 and the external environment, thus ensuring the reliability of the separation pipe section 22 in separating solid particles in the air.

[0031] It should be noted that in the engine intake system 100 of this application embodiment, a main filter element 13 is provided in the air filter body 1. The main filter element 13 is used to further filter the air, so as to fully filter out pollutants such as sand particles mixed in the air and then transport them to the engine side. If the content of pollutants such as sand particles mixed in the air is low, the load on the main filter element 13 will be lower, thereby extending the service life of the main filter element 13 while ensuring the filtering effect of the engine intake system 100 on impurities in the air.

[0032] According to the engine intake system 100 of this application embodiment, the intake pipe assembly 2 is used to deliver air to one side of the air filter body 1. During the process of air flowing through the intake pipe assembly 2, solid particles mixed in the air (such as sand) can be guided to the wall of the swirl pipe section 21 under the action of the swirl pipe section 21, and further transported to the downstream side of the swirl pipe section 21 (i.e. the exhaust side of the swirl pipe section 21). The separation pipe section 22 can separate the solid particles mixed in the air and collect them in the collection assembly 3 connected to the separation pipe section 22, thereby achieving preliminary separation of solid particles in the air at the intake pipe assembly 2, so as to reduce the content of solid particles in the air delivered to the intake chamber 101, which can reduce the load on the air filter body 1, and thus help extend the service life of the main filter element 13 in the air filter body 1 while ensuring the air filtration effect of the air filter body 1.

[0033] In other words, the engine intake system 100 in the embodiments of this application can filter air at the intake pipe assembly 2 and the air filter body 1 respectively, so as to achieve multi-stage filtration of pollutants in the air, thereby reducing the risk of damage to the main filter element 13, effectively eliminating the risk of solid particles such as sand penetrating the filter material at the main filter element 13, and avoiding the problem of solid particles such as sand entering the engine and causing engine damage.

[0034] Reference Figure 4 As shown in a further embodiment of this application, the separation pipe section 22 includes at least one annular separation section, which is connected to the exhaust side of the swirl pipe section 21, and the air discharged through the swirl pipe section 21 can enter the annular separation section.

[0035] The inner wall of the annular separation section has an arc-shaped groove that is recessed radially outward, so that the opening of the arc-shaped groove is open towards the central axis of the separation pipe section 22.

[0036] Understandably, the separation pipe section 22 is connected to the downstream side of the cyclone pipe section 21 (which is also the exhaust side of the cyclone pipe section 21). Under the guiding effect of the cyclone pipe section 21, solid particles will be guided towards the wall of the cyclone pipe section 21 and then further transported downstream, so that the solid particles in the air entering the annular separation section are also located near the wall of the annular separation section. Since an arc-shaped groove is formed at the annular separation section that is concave outward in the radial direction, solid particles can enter the arc-shaped groove and be separated under the constraint of the arc-shaped groove, thereby achieving the separation of solid particles in the air.

[0037] It should be noted that the separation pipe section 22 includes at least one annular separation section. The annular separation section can separate solid particles near the wall surface to reduce the content of solid particles in the air transported downstream of the separation pipe section 22. The more annular separation sections there are, the better the separation effect on solid particles.

[0038] like Figure 4 As shown, in a further embodiment of this application, the annular separation section includes: a first annular separation section 221 and a second annular separation section 222. The air inlet side of the first annular separation section 221 is connected to the exhaust side of the swirl tube section 21, so that the air discharged from the swirl tube section 21 can enter the first annular separation section 221 to achieve preliminary filtration of solid particles mixed in the air.

[0039] Furthermore, the second annular separation section 222 is connected to the exhaust side of the first annular separation section 221, and the maximum radial dimension of the second arc-shaped groove of the second annular separation section 222 is greater than the maximum radial dimension of the first arc-shaped groove of the first annular separation section 221, so that the air flowing through the separation pipe section 22 can achieve multi-stage separation at the first annular separation section 221 and the second annular separation section 222, thereby improving the separation and filtration effect of the separation pipe section 22 on solid particles.

[0040] Reference Figure 4 As shown, the radial dimension of the second arc-shaped groove formed at the second annular separation section 222 is greater than the radial dimension of the first arc-shaped groove formed at the first annular separation section 221, so that the bottom of the second arc-shaped groove can be located at a position lower than the first arc-shaped groove, making it easier for solid particles near the wall to be constrained by the second arc-shaped groove to achieve separation.

[0041] Understandably, since the radial dimension of the second arc-shaped groove is larger than that of the first arc-shaped groove, the second arc-shaped groove can form a further recessed space that is radially recessed outward on the downstream side of the first arc-shaped groove. This enhances the constraint effect of the second arc-shaped groove on solid particles compared to the first arc-shaped groove, thereby achieving further separation of solid particles in the air. Through multiple annular separation sections, step-by-step flow guidance and deposition are achieved, improving the separation effect of solid particles.

[0042] Combination Figure 3 and Figure 4 As shown, in some embodiments of this application, the intake pipe assembly 2 further includes a transition pipe section 23, which connects the exhaust side of the swirl pipe section 21 and the intake side of the separation pipe section 22. The opening cross-sectional size of the transition pipe section 23 gradually decreases from the intake side to the exhaust side, thereby forming a pipe section structure that gradually narrows towards the exhaust side.

[0043] Specifically, the transition pipe section 23 connects the swirl pipe section 21 and the separation pipe section 22. The air discharged from the swirl pipe section 21 enters the separation pipe section 22 after flowing through the transition pipe section 23. Since the transition pipe section 23 is gradually narrowed towards the exhaust side, the air velocity increases when flowing through the transition pipe section 23, thereby improving the air delivery effect to the downstream side of the transition pipe section 23.

[0044] It can be further understood that after the air flows through the swirl tube section 21, the solid particles mixed in the air are guided to the inner wall of the tube structure by the guide section 211 and further transported downstream. When the air is transported to the separation tube section 22 via the transition tube section 23, the solid particles can fit tightly with the wall of the transition tube section 23 so that the solid particles can fully contact the wall of the separation tube section 22 after entering the separation tube section 22 and achieve separation, thus confining the solid particles at the separation tube section 22.

[0045] like Figure 4 As shown in a further embodiment of this application, a portion of the annular separation section is arranged in a gradually expanding shape from the end connected to the transition pipe section 23 toward the exhaust side, thereby forming a sinking structure on the downstream side of the transition pipe section 23 through the annular separation section, so as to separate and constrain solid particles within the area of ​​the separation pipe section 22 through the annular separation section.

[0046] It is understandable that when air enters the separation section 22 from the transition section 23, the cross-sectional size of the airflow increases, which can slow down the airflow velocity at the separation section 22, reduce the driving effect of the airflow on the solid particles, and facilitate the confinement of the solid particles at the separation section 22, thereby achieving the separation and confinement of the solid particles by the separation section 22.

[0047] Reference Figure 4As shown, at the connection point between the separation pipe section 22 and its downstream pipe section (such as the outlet pipe section 25), a pipe section is formed that tapers downstream. This increases the difficulty for solid particles to be carried out of the separation pipe section 22 by the airflow, thereby better confining the solid particles at the separation pipe section 22 and reducing the number of solid particles that enter the pipe structure downstream of the separation pipe section 22 under the influence of the airflow.

[0048] like Figure 4 As shown, in some embodiments of this application, the separating pipe section 22 is formed with a through hole 223 that penetrates the pipe wall, the collecting component 3 is connected to the circumferential outer side of the separating pipe section 22, and the open end of the collecting cavity 301 is disposed opposite to the through hole 223.

[0049] Understandably, the via 223 can connect the inside of the separation tube section 22 with the outside of the separation tube section 22, so that solid particles in the air flowing through the separation tube section 22 can be discharged to the outside of the separation tube section 22 through the via 223, thereby reducing the solid particles in the separation tube section 22.

[0050] Furthermore, solid particles discharged through the hole 223 can enter the collection chamber 301 from the open end of the collection chamber 301, so that the solid particles separated from the separation tube section 22 can be collected by the collection component 3, thereby discharging the solid particles in the separation tube section 22, and the collection component 3 can block the hole 223 to prevent contaminants outside the separation tube section 22 from entering the separation tube section 22 through the hole 223.

[0051] In a further embodiment of this application, the collection component 3 includes a collection box 31 and a valve. The collection box 31 is connected to the bottom of the separation tube section 22, and the collection box 31 forms a collection cavity 301 that opens to one side of the separation tube section 22 to collect solid particles separated from the separation tube section 22 through the collection cavity 301. The valve is provided in the collection box 31, and the valve can be selectively opened to communicate the collection cavity 301 with the outside of the collection box 31, thereby discharging the solid particles collected in the collection cavity 301 through the valve, so as to reserve storage space in the collection cavity 301 and ensure the collection effect of solid particles at the collection box 31.

[0052] It is understood that the collection box 31 is located at the bottom of the separation tube section 22, and the collection box 31 has a collection cavity 301 that is open to the upward side (i.e., towards the separation tube section 22). The through hole 223 on the separation tube section 22 is positioned opposite to the open end of the collection cavity 301, that is, the through hole 223 is located at the bottom of the separation tube section 22. Solid particles are constrained in the arc-shaped groove by the annular separation section to reduce the solid particle content in the air transported downstream of the separation tube section 22. The solid particles located in the arc-shaped groove converge towards the bottom of the annular separation section under the action of gravity, allowing them to be discharged from the through hole 223 at the bottom of the separation tube section 22 and fall into the collection box 31, thus achieving the collection of solid particles for unified collection and processing.

[0053] The collection chamber 301 formed by the collection box 31 has a limited volume, so the solid particles in the collection chamber 301 can be discharged by opening the valve to empty the collection chamber 301 and ensure the collection effect of the collection chamber 301 on solid particles.

[0054] It should be noted that the installation method of the collection box 31 and the separation pipe section 22 is not specifically limited here, as long as the collection box 31 and the separation pipe section 22 can be fixedly connected, such as by snap-fitting the collection box 31 and the separation pipe section 22, or by connecting and fixing the collection box 31 and the separation pipe section 22 with screws, etc. At the same time, when multiple annular separation sections are formed in the diversion pipe section, each annular separation section (such as the first annular separation section 221 and the second annular separation section 222 mentioned above) has a through hole 223 at the bottom, so as to meet the discharge requirements of solid particles in the arc-shaped groove of each annular separation section.

[0055] In a further embodiment of this application, the collection component 3 also includes a sensor, which is disposed inside the collection box 31 to determine the amount of solid particles collected in the collection box 31 by means of parameters obtained by the sensor, thereby controlling the valve and thus realizing the timely discharge of solid particles in the collection box 31.

[0056] The sensor can be configured as a pressure sensor to determine the amount of solid particles in the collection box 31 based on the pressure parameters detected by the sensor; alternatively, the sensor can be configured as a position sensor to detect the height parameters of the solid particles collected in the storage cavity, thereby determining the amount of solid particles collected in the collection box 31. It should be noted that the specific construction and setting of the sensor are not specifically limited here.

[0057] In some optional embodiments of this application, the valve may be electrically driven to realize the valve opening or closing action, and the valve may be opened by means of translation, flipping, rotation or other methods relative to the collection box 31.

[0058] like Figure 2 As shown, in some embodiments of this application, the flow guide 211 is constructed as a flow guide blade 2111, one end of which is connected to the inner wall of the swirl tube section 21 and extends toward the air inlet side of the swirl tube section 21 near the central axis of the swirl tube section 21.

[0059] The guide vane 2111 guides the air flowing through the swirl tube section 21 toward the wall of the swirl tube section 21, so as to guide the solid particles mixed in the air to the wall, so that the solid particles can be transported downstream along the wall of the swirl tube section 21, which facilitates the separation of solid particles by the separation tube section 22.

[0060] Specifically, the guide vane 2111 extends in a spiral shape, and one end of the guide vane 2111 is connected to the inner peripheral wall of the swirl tube section 21. The guide vane 2111 extends spirally from the inner peripheral wall of the swirl tube section 21 towards the air inlet side, so that the front end of the guide vane 2111 (i.e. the other end of the guide vane 2111, which is also the end of the guide vane 2111 near the air inlet side of the swirl tube section 21) is set towards the central axis of the swirl tube section 21. This allows the airflow passing through the guide vane 2111 to be guided from the center position towards the inner peripheral wall of the swirl tube section 21, improving the guiding effect of the guide vane 2111 on the air, so that solid particles can be guided to the inner peripheral wall of the swirl tube section 21.

[0061] Reference Figure 2 As shown, in a further embodiment of this application, there are multiple guide vanes 2111, which are arranged at intervals around the central axis of the swirl tube section 21, so that air can be guided to the inner peripheral wall of the swirl tube section 21 through the multiple guide vanes 2111.

[0062] Understandably, since the guide vanes 2111 are spirally arranged and extend from the inner peripheral wall of the swirl tube section 21 towards the central axis, the more guide vanes 2111 there are in the axial projection of the swirl tube section 21, the larger the projection area of ​​the open cross-section of the swirl tube section 21 that the projection of the guide vanes 2111 can cover. This allows for sufficient air diversion and guidance through multiple guide vanes 2111, ensuring the air guidance effect at the guide vanes 2111.

[0063] Combination Figure 2 and Figure 3As shown, in some embodiments of this application, the intake pipe assembly 2 further includes an intake pipe section 24, which has an air inlet, and the exhaust side of the intake pipe section 24 is connected to the intake side of the swirl pipe section 21. That is, the intake pipe section 24 is connected to the upstream side of the swirl pipe section 21, and the intake pipe section 24 is used to communicate with the outside atmosphere, thereby stabilizing the airflow on the upstream side of the swirl pipe section 21 through the intake pipe section 24.

[0064] The intake pipe section 24 can be constructed as a straight pipe section to improve the stability of the airflow.

[0065] Combination Figure 2 and Figure 3 As shown, in some embodiments of this application, the intake pipe assembly 2 further includes an exhaust pipe section 25, the exhaust side of which is connected to the intake chamber 101, and the intake side of the exhaust pipe section 25 is connected to the exhaust side of the split pipe section 22. That is, the exhaust pipe section 25 is connected between the split pipe section and the intake chamber 101, so as to stabilize the airflow on the downstream side of the split pipe section and improve the stability of gas delivery to the intake chamber 101.

[0066] Among them, the air outlet pipe section 25 can be constructed as a flexible pipe section to reduce the difficulty of arranging the air intake pipe assembly 2 and facilitate the connection and cooperation between the air intake pipe assembly 2 and the air filter body 1.

[0067] In some embodiments of this application, the air filter body 1 includes a lower body shell 11, an upper body shell 12, and a main filter element 13. The lower body shell 11 and the upper body shell 12 are engaged in a vertical direction and together enclose a cavity. The main filter element 13 is arranged in the cavity, and the above-mentioned air intake cavity 101 is defined on the lower side of the main filter element 13, and the air outlet cavity 102 is defined on the upper side of the main filter element 13. The air outlet cavity 102 is used to discharge filtered air and deliver it to the engine side.

[0068] It is understandable that the intake pipe assembly 2 is connected to the intake chamber 101, so that the air delivered to the air filter body 1 can be delivered from bottom to top, thereby ensuring that the air is in full contact with the main filter element 13 and ensuring the filtration effect of the main filter element 13 on the air.

[0069] In some embodiments of this application, the bottom wall of the lower shell 11 of the main body is provided with a sand discharge valve 14. The sand discharge valve 14 is used to discharge solid particles (such as sand) separated in the air intake chamber 101, so as to avoid sand particles from being retained in the air intake chamber 101.

[0070] The lower shell 11 of the main body has a guide surface that is inclined downward toward the sand discharge valve 14, so that the solid particles separated by the filter element 13 can converge toward the sand discharge valve 14 under the guidance of the guide surface, so that the solid shell can be discharged from the lower shell 11 of the main body.

[0071] It is understood that the sand discharge valve 14 is preferably located in the lowest region of the lower shell 11 of the main body, and a sand discharge hole 111 corresponding to the sand discharge valve 14 is formed on the bottom wall of the lower shell 11 of the main body, so as to discharge sand particles and the like to the sand discharge valve 14 through the sand discharge hole 111.

[0072] In some embodiments of this application, the engine intake system 100 further includes an exhaust pipe assembly 4, which is connected to the exhaust chamber 102 to discharge gas in the exhaust chamber 102 to the engine side.

[0073] The engine intake system 100 according to the embodiments of this application has at least the following advantages: (1) The intake pipe assembly 2 is provided with a swirl pipe section 21 and a separation pipe section 22. The swirl pipe section 21 can guide the air centrifugally to guide the solid particles mixed in the air to the wall of the pipe section. The separation pipe section 22 can constrain the solid particles in the arc groove to achieve the separation of the solid shell from the air, thereby reducing the content of solid particles in the air delivered to the air filter body 1, which helps to reduce the load on the air filter body 1 and extend the service life of the main filter element 13 in the air filter body 1. (2) Multiple annular separation sections are formed at the separation pipe section 22 to achieve step-by-step flow and deposition of solid particles at the separation pipe section 22, thereby achieving efficient graded interception of solid particles, and the separated solid particles can be directionally stored in the collection component 3.

[0074] According to the embodiments of this application, the vehicle includes the engine intake system 100 described above. The engine intake system 100 has a good filtration effect on impurities in the air (such as solid particles), can ensure the gas delivery effect to the engine side, helps to improve the engine's operating stability, and reduces problems such as cylinder scoring caused by insufficient filtration.

[0075] 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", "axial", "radial", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and 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.

[0076] In the description of this application, "first feature" and "second feature" may include one or more of the features.

[0077] In the description of this application, "multiple" means two or more.

[0078] 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.

[0079] 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: Air filter body (1), the air filter body (1) has an air intake chamber (101); Intake pipe assembly (2), the intake pipe assembly (2) comprising: A swirl tube section (21) is provided with a flow guide (211) inside the swirl tube section (21). The flow guide (211) can centrifugally guide the gas flowing through the swirl tube section (21) to the inner peripheral wall side of the swirl tube section (21). A separation pipe section (22) is connected to the exhaust side of the cyclone pipe section (21) and is used to separate solid particles in the gas flowing through the separation pipe section (22), and the exhaust side of the separation pipe section (22) is connected to the air inlet chamber (101). A collection component (3) is installed on the separation tube section (22) and forms a collection cavity (301) communicating with the interior of the separation tube section (22). The collection cavity (301) is used to collect the solid particles.

2. The engine air intake system of claim 1, wherein, The separation pipe section (22) includes at least one annular separation section connected to the exhaust side of the swirl pipe section (21), and the inner wall of the annular separation section is formed with an arc-shaped groove that is recessed radially outward.

3. The engine air intake system of claim 2, wherein, The annular separation section includes: The first annular separation section (221) has its intake side connected to the exhaust side of the swirl tube section (21); The second annular separation section (222) is connected to the exhaust side of the first annular separation section (221), and the maximum radial dimension of the second arc groove of the second annular separation section (222) is greater than the maximum radial dimension of the first arc groove of the first annular separation section (221).

4. The engine air intake system of claim 2, wherein, The intake pipe assembly (2) further includes a transition pipe section (23), which connects the exhaust side of the swirl pipe section (21) and the intake side of the separation pipe section (22), and the opening cross-sectional size of the transition pipe section (23) gradually decreases from the intake side to the exhaust side.

5. The engine air intake system of claim 1, wherein The separation pipe section (22) has a through hole (223) that penetrates the pipe wall. The collection assembly (3) is connected to the circumferential outer side of the separation pipe section (22), and the open end of the collection cavity (301) is disposed opposite to the through hole (223).

6. The engine air intake system of claim 5, wherein, The collection component (3) includes: Collection box (31), which is connected to the bottom of the separation tube section (22) and forms a collection cavity (301) open to one side of the separation tube section (22). A valve is provided in the collection box (31) and can be selectively opened to communicate the collection chamber (301) with the outside of the collection box (31).

7. The engine air intake system of claim 1, wherein The guide section (211) is constructed as a guide vane (2111), one end of which is connected to the inner wall of the swirl tube section (21) and extends toward the air inlet side of the swirl tube section (21) near the central axis of the swirl tube section (21).

8. The engine air intake system of claim 7, wherein, There are multiple guide vanes (2111), and the multiple guide vanes (2111) are arranged at intervals around the central axis of the swirl tube section (21).

9. The engine air intake system of claim 1, wherein, The intake manifold assembly (2) also includes: The intake pipe section (24) has an air inlet, and the exhaust side of the intake pipe section (24) is connected to the intake side of the swirl pipe section (21). And / or, an exhaust pipe section (25), the exhaust side of which is connected to the intake chamber (101), and the intake side of which is connected to the exhaust side of the separation pipe section (22).

10. A vehicle characterized by comprising: Includes the engine intake system according to any one of claims 1-9.

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