A commercial vehicle intake system and a commercial vehicle

Abstract

This invention relates to a commercial vehicle intake system and a commercial vehicle, belonging to the field of vehicle power systems. The technical solution is as follows: A commercial vehicle intake system includes an intake duct, an oil filter, and an air filter connected sequentially along the airflow direction. A water-screening assembly is installed within the air inlet of the intake duct, comprising a water-screening plate and a water collection hopper, the bottom of which connects to the outside of the intake duct. A tower-type water-filtering assembly is installed within the air outlet of the intake duct, comprising multiple stacked blades, with a first water collection trough below the blades. A swirl assembly is installed at the air inlet of the oil filter, comprising a swirl fan, with a second water collection trough below the fan. This solution, through a three-stage water removal assembly, gradually separates moisture from the air while simultaneously improving the removal capacity of dust and other impurities, significantly reducing the moisture and dust content of the air entering the oil filter and air filter, thus ensuring the service life of the oil filter and air filter and the combustion performance of the engine.

Description

Technical Field

[0001] This invention relates to the field of vehicle power systems, and in particular to a commercial vehicle intake system and a commercial vehicle. Background Technology

[0002] The intake system is part of the vehicle's power system. It is located at the front of the engine and draws in outside air through the engine's combustion back pressure to provide oxygen for combustion. Since the intake system supplies air to the engine, it needs to remove moisture, dust, and other impurities from the intake air as thoroughly as possible. If the air entering the engine contains too much moisture, dust, or other impurities, it will directly affect the combustion in the engine, reduce the vehicle's power performance, and dust accumulation will also accelerate engine wear.

[0003] Heavy commercial vehicles operate under harsh conditions, often in dusty environments or in rainy or snowy weather. Therefore, heavy commercial vehicles have high requirements for the performance of their intake systems in removing water and dust.

[0004] Currently, in order to draw in relatively clean air, the air intake system of heavy commercial vehicles generally includes an oil filter and an air filter. The oil filter first performs pre-filtration, and then the air filter performs fine filtration to remove dust from the air.

[0005] However, existing oil filters and air filters are mainly designed to filter solid impurities. In harsh weather conditions such as rain or snow, or in environments with high humidity, they cannot effectively remove moisture from the air. This can easily lead to excessive water accumulation in the oil filter, wetting of the air filter element, increased intake resistance, or excessive moisture entering the engine and affecting combustion performance. Existing water and dust removal structures installed in the intake manifold are usually applicable to limited operating conditions. For example, adding an "L"-shaped baffle to the intake manifold can achieve separation of air and impurities by utilizing the principle that impurities and air have different gravities during the ascent process. However, this type of pre-filtration structure occupies a large space, and the pre-filtration efficiency is greatly affected by the airflow velocity. When the airflow velocity exceeds a certain value, the entrainment effect of the airflow on impurities is strengthened, and most of the impurities pass through the baffle with the air, causing the pre-filtration efficiency to drop sharply. Summary of the Invention

[0006] This invention addresses the problem of low filtration efficiency of current commercial vehicle air intake systems in removing moisture, dust, and other impurities from the intake air, and provides a commercial vehicle air intake system.

[0007] To solve the above problems, the technical solution adopted by the present invention is as follows: a commercial vehicle air intake system, including an air intake duct, an oil filter, and an air filter connected sequentially along the airflow direction. The air intake port of the air intake duct is horizontally arranged, and a water screening component is provided inside the air intake port. The water screening component includes a water screening plate and a water collection hopper, which is vertically connected. The water screening plate is located at the top opening of the water collection hopper and is inclined upward along the air intake direction. The water screening plate has multiple screen holes. The bottom of the water collection hopper is connected to the outside of the air intake duct. The air outlet of the air intake duct is vertically arranged, and a tower-type water filter component is provided inside the air outlet. The tower-type water filter component includes multiple stacked blades with the outer edges of the blades inclined downward. A first water collection trough is provided below the bottommost blade and is connected to the outside of the air intake duct. The air outlet of the air intake duct is connected to the air inlet of the oil filter. The air inlet of the oil filter is provided with a vortex component, which includes a vortex fan. A second water collection trough is provided below the vortex fan and is connected to the outside of the oil filter. This solution uses a water sieving component to cause water droplets in the intake air to collide with and adhere to the sieving plate, forming a water film. The water film moves along the inclined angle of the sieving plate under the influence of airflow and enters the water collection hopper through the sieve holes, exiting the intake duct. The separation effect of the water sieving component is significant when the airflow velocity is low. A tower-type water filtration component causes residual moisture in the air to collide with and adhere to the blades under the action of gravity and airflow, flowing from top to bottom along the edge angle of the blades into the first water collection tank and exiting the intake duct. A vortex component causes the airflow to swirl, and residual moisture in the air is thrown into the second water collection tank under centrifugal force and exits the oil filter. The separation effect of the vortex component is significant when the airflow velocity is high. This solution makes full use of airflow patterns, using a three-stage water removal assembly before the oil filter and air filter to gradually separate moisture from the air. It can effectively remove water regardless of the airflow speed, while also improving the removal capacity of dust and other impurities. This greatly reduces the moisture and dust content of the air entering the oil filter and air filter, ensuring the service life of the oil filter and air filter and the combustion performance of the engine.

[0008] Preferably, at least two water screening components are provided, arranged vertically. The water screening plate of the lower adjacent water screening component has a water inlet, which is connected to the lower end of the water collection hopper of the upper adjacent water screening component. The lower end of the water collection hopper of the lowermost water screening component is provided with a first duckbill valve, which passes through the outer wall of the air intake passage. By setting multiple water screening components, an air intake channel is formed between adjacent water screening components, which improves the airflow uniformity of the horizontal section cross-section of the air intake passage and ensures low air intake resistance.

[0009] The water-screening plate is curved into an arc shape along the air intake direction. A guide plate is also provided in the upper water-screening assembly. The guide plate includes upper and lower blades that are hinged together. The upper blade connects to the water-screening plate or the water-collecting hopper. The hinge axis between the upper and lower blades is horizontally set and perpendicular to the air intake direction. The highest point of rotation of the lower edge of the lower blade is no higher than the upper edge of the water-screening plate in the adjacent water-screening assembly below. The arc-shaped design of the water-screening plate allows the airflow to rise along its arc surface, ensuring low air intake resistance and facilitating the flow and collection of water droplets on the plate. The edge design of the guide plate and the water-screening plate ensures a large water-screening area in the air intake direction, stabilizing the water removal efficiency. The water removal effect of the water-screening plate is significant at lower airflow velocities.

[0010] Preferably, the screen holes are straight grooves, horizontally arranged along their length, and have a raised edge along the upper edge that protrudes towards the windward side of the screen plate. This raised edge along the upper edge of the screen holes intercepts the water film in the air inlet direction, ensuring that the water film can smoothly enter the screen holes.

[0011] Preferably, the screen holes are arranged in multiple rows along the length of the screen plate, with the screen holes in adjacent rows staggered. The length of each screen hole is greater than the distance between adjacent screen holes in each row. This staggered arrangement of the screen holes ensures that the vertical direction of the water film flow is covered by screen holes, allowing most of the water adhering to the screen plate to enter the screen holes.

[0012] Preferably, the air intake of the air intake duct is equipped with an air intake grille, the outline of which is adapted to the air intake of the air intake duct. An upper baffle is provided at the top of the air intake grille, the lower edge of which is not higher than the upper edge of the uppermost water-screening plate; a lower baffle is provided at the bottom of the air intake grille, the upper edge of which is not lower than the lower edge of the lowermost water-screening plate. Through the edge design of the air intake grille and the water-screening plate, the water-screening area of ​​the water-screening plate in the air intake direction is ensured, stabilizing the water removal efficiency. At lower airflow velocities, the water removal effect of the water-screening plate is significant.

[0013] Preferably, the water collecting hopper includes an internally connected water collecting section and a water drawing section. The water collecting section is located above the water drawing section, and a water screening plate is installed on the top surface of the water collecting section. The longitudinal section of the bottom of the water collecting section, perpendicular to the air intake direction, is V-shaped. The cross-section of the water drawing section, parallel to the air intake direction, is slotted and connected to the V-shaped bottom of the water collecting section. The length of the slot in the water drawing section is set along the air intake direction and gradually shortens downwards in the vertical direction. The windward side of the water drawing section is inclined towards the inside of the air intake channel. The V-shaped bottom of the water collecting section allows the water collected in the water collecting section to quickly converge and flow into the water drawing section and then out of the air intake channel. The water drawing section is a flat tube with a hollow interior, and its plane is parallel to the airflow direction, which reduces the obstruction area in the air intake direction, thereby reducing air intake resistance and making air intake smoother.

[0014] Preferably, a water collecting ring is provided inside the air outlet of the air intake, the water collecting ring is through the upper and lower parts, and a first water collecting groove is formed between the outer wall of the water collecting ring and the inner wall of the air intake. A drain pipe is also provided at the bottom of the first water collecting groove, and the drain pipe is connected to the outside of the air intake. The outline area of ​​each blade of the tower-type water filter assembly gradually increases from top to bottom. A flow divider is provided above the uppermost blade, and a connecting base is provided below the lowermost blade. The connecting base is fastened to the top of the side wall of the water collecting ring.

[0015] Preferably, the cyclone assembly includes a shell and a top cover. The shell is hollow inside and open at the top. The top cover is installed on top of the shell. The shell and top cover have an elongated oval cross-section. A cyclone fan is installed in the top cover. At least two cyclone fans are provided, arranged side by side along the length of the elongated oval opening in the shell. An air inlet pipe is provided inside the shell corresponding to the position of the cyclone fan. The air inlet pipe passes through the bottom plate of the shell. The number of air inlet pipes corresponds to the number of cyclone fans. A partition is provided between adjacent air inlet pipes. A second water collection tank is formed between the inner wall of the shell and the outer wall of the air inlet pipe. A drain pipe is also provided at the bottom of the second water collection tank, and the drain pipe connects to the outside of the oil filter. The cyclone fan includes a mounting ring. The top cover has a cyclone cylinder. The mounting ring is embedded in the cyclone cylinder. A guide cone is provided at the axial position of the mounting ring. Multiple cyclone vanes are arranged circumferentially between the mounting ring and the guide cone. The cyclone fan can accelerate the airflow to diffuse evenly in all directions, improving the water separation efficiency of the cyclone assembly.

[0016] Preferably, the air intake is L-shaped, including a horizontal section and a vertical section, with the cross-sectional area of ​​the horizontal section being larger than that of the vertical section. A set of opposite sidewalls of the vertical section are recessed into the vertical section to form a top plate, with the length of the top plate along the vertical direction and the top surfaces of the top plates in contact with each other. The airflow velocity increases after entering the vertical section, providing a flow rate guarantee for the subsequent swirl assembly to remove water. The connection of the top surfaces of the top plates strengthens the air intake panel, thereby reducing noise generated by the air intake panel. Simultaneously, the I-shaped cross-section of the top plate divides and organizes the turbulent airflow entering the vertical section, improving the airflow uniformity of the vertical section's cross-section and ensuring lower intake resistance. Furthermore, it increases the inner surface area of ​​the vertical section, i.e., the area for water adhesion, enabling the air intake itself to absorb more moisture.

[0017] Preferably, the air filter includes an air filter body and an end cap. A filter element is installed inside the air filter body. The air filter body has a cylindrical structure, and an air filter inlet is located at one end of the outer circumference of the air filter body. The cross-section of the air filter inlet is elliptical, with the major axis of the ellipse aligned axially with the air filter body. A portion of the outer circumference of the air filter body is recessed to form a guide section, which is spirally arranged axially with the air filter body. The inner wall of the guide section contacts or has a small gap with the outer surface of the filter element. A convex ring is located on the side of the end cap facing the interior of the air filter body. One end of the filter element is embedded in the convex ring, and the other end is installed in a sealing groove. The dust discharge port faces the convex ring. This air filter, through tangential air intake and an internal spiral structure, can promptly disperse the airflow at the inlet, reducing intake resistance and minimizing direct impact of the airflow on the filter element, preventing filter paper damage. It also promotes a swirling motion of the airflow around the filter element from the inlet towards the end cap, extending the airflow path and ensuring thorough separation of impurities and air. The filter element at the convex ring has a weaker adsorption force for impurities, while most impurities at the end cap fall into the dust discharge pipe under the combined action of gravity and centrifugal force, preventing separated impurities from being adsorbed on the filter paper surface. This improves the utilization rate of the filter element and enhances the dust removal effect.

[0018] On the other hand, the present invention also provides a commercial vehicle, including a frame and a cab, as well as the aforementioned commercial vehicle air intake system, wherein an oil filter and an air filter are mounted on the frame, and an air intake duct is mounted on the rear panel of the cab.

[0019] As can be seen from the above technical solutions, the advantages of this invention are as follows: By setting an air intake grille, a water sieving assembly, and a tower-type water filtration assembly in the L-shaped air intake duct, and by setting a vortex assembly at the oil filter inlet and a tangential air intake and internal spiral structure at the air filter inlet, the water and dust removal effect of the air intake system is greatly improved. Through the water sieving assembly, water droplets in the intake air collide with and adhere to the water sieving plate to form a water film. Driven by the airflow, the water film moves along the inclined angle of the water sieving plate and enters the water collection hopper through the screen holes, then is discharged outside the air intake duct. The separation effect of the water sieving assembly is significant when the airflow velocity is low. Through the tower-type water filtration assembly, residual moisture in the air is separated by gravity and airflow. The airflow impacts and adheres to the splitter plate and blades, flowing from top to bottom along the edge angle of the splitter plate and blades into the first water collection tank and then out of the intake duct. Through the swirl assembly, the airflow undergoes a swirling motion, and residual moisture in the air flows into the second water collection tank along the inner wall of the swirl cylinder under centrifugal force and is discharged out of the oil filter. When the airflow velocity is high, the separation effect of the swirl assembly is obvious. Through tangential air intake and internal spiral structure, the airflow is made to swirl around the filter element along the direction of the air inlet towards the end cover, which can promptly disperse the airflow at the air inlet, protect the filter paper, reduce air intake resistance, and accelerate the discharge of impurities out of the air filter. When the airflow velocity is high, the separation effect of the air filter is obvious. This solution fully utilizes airflow patterns, employing a three-stage water removal assembly and a tangential air intake and internal spiral structure in the air filter to gradually separate moisture from the air. It effectively removes water regardless of airflow velocity, while simultaneously improving the removal of dust and other impurities. This significantly reduces the moisture and dust content of the air entering the oil filter and air filter, ensuring their service life and the engine's combustion performance. Furthermore, the commercial vehicle provided by this invention features the aforementioned air intake system, resulting in clean and dry engine air intake and improved power performance. Attached Figure Description

[0020] To more clearly illustrate the technical solution of the present invention, the accompanying drawings used in the description will be briefly introduced below. Obviously, the accompanying 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.

[0021] Figure 1 This is a structural schematic diagram of a specific embodiment of the present invention.

[0022] Figure 2 This is a schematic diagram of the air intake duct in a specific embodiment of the present invention.

[0023] Figure 3 This is a schematic diagram of the air intake grille in a specific embodiment of the present invention.

[0024] Figure 4 This is a schematic diagram of the structure of the first water screening component in a specific embodiment of the present invention.

[0025] Figure 5 This is a schematic diagram of the structure of the second water screening component in a specific embodiment of the present invention.

[0026] Figure 6 This is a schematic diagram of the third water screening component in a specific embodiment of the present invention.

[0027] Figure 7 This is a schematic diagram of the tower-type water filtration assembly in a specific embodiment of the present invention.

[0028] Figure 8 This is a schematic diagram of the structure of the oil filter in a specific embodiment of the present invention.

[0029] Figure 9 This is a schematic diagram of the structure of the oil filter housing in a specific embodiment of the present invention.

[0030] Figure 10 This is a schematic diagram of the air filter structure in a specific embodiment of the present invention.

[0031] Figure 11 This is a schematic diagram of the end cap of the air filter in a specific embodiment of the present invention.

[0032] In the diagram: 1. Air intake duct, 112. Top plate, 115. Mounting plate, 12. Air intake grille, 123. Lower baffle, 124. Upper baffle, 13. First water screening assembly, 131. First water screening plate, 132. First water collecting hopper, 133. First guide plate, 14. Second water screening assembly, 141. Second water screening plate, 142. Second water collecting hopper, 143. Second guide plate, 15. Third water screening assembly, 151. Third water screening plate, 152. Third water collecting hopper, 153. First duckbill valve, 16. Tower-type water filter assembly, 161. Diverter plate, 162. Blade, 163. 164. Connecting base, 17. Buckle, 18. Water collection ring, 19. Second duckbill valve, 2. Bellows, 3. First connecting pipe, 4. Oil filter, 411. Housing, 4112. Air inlet pipe, 4114. Partition, 44. Top cover, 45. Swirl fan, 47. Drain pipe, 5. Second connecting pipe, 6. Air filter, 61. Air filter body, 611. Air filter inlet, 613. Guide section, 62. End cap, 623. Convex ring, 63. Filter element, 64. Dust outlet, 7. Third connecting pipe, 8. Oil filter bracket, 9. Air filter bracket, 10. Frame, 11. Cab. Detailed Implementation

[0033] To make the objectives, features, and advantages of this invention more apparent and understandable, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings of the specific embodiments. Obviously, the embodiments described below are only some embodiments of this invention, and not all embodiments. Based on the embodiments of this patent, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this patent.

[0034] Example 1

[0035] like Figure 1 As shown, a commercial vehicle air intake system includes an air intake duct 1, an oil filter 4, and an air filter 6 connected sequentially along the airflow direction. The air intake duct outlet is provided with a bellows 2, and the oil filter 4 inlet is provided with a first connecting pipe 3. The lower end of the bellows 2 is connected to the first connecting pipe 3, and the oil filter 4 outlet and the air filter 6 inlet are connected via a second connecting pipe 5.

[0036] like Figure 2 As shown, the air intake duct 1 is L-shaped, including a horizontal section and a vertical section. The left end of the horizontal section is the air inlet, and the lower end of the vertical section is the air outlet. An air intake grille 12 is installed at the air inlet, a water sieve assembly is installed inside the air inlet, and a tower-type water filter assembly 16 is installed inside the air outlet.

[0037] Preferably, the water screening components are provided with at least two, so as to Figure 2 In this embodiment, as shown, there are three water screening components arranged from top to bottom: the first water screening component 13, the second water screening component 14, and the third water screening component 15. Figure 4 , 5As shown in Figure 6, the three water screening components have basically the same structure, each including a water screening plate and a water collection hopper. The water collection hopper is vertically connected, including an internally connected water collection section and a water intake section. The water collection section is an arc-shaped water trough structure. The longitudinal section of the bottom of the water collection section, perpendicular to the air intake direction, is a V-shaped surface with a central depression. The lowest point of the central depression of the trough is connected to the water intake section to ensure that the water collected in the water collection section can be completely and quickly gathered and flow into the water intake section. The water intake section is connected downwards to the water collection hopper of the adjacent water screening component below. The water collection hoppers of multiple water screening components are interconnected vertically. The water intake section of the lowest water collection hopper is connected to the outside of the air intake duct. The water screening plate is a quadrilateral panel with a spatially curved arc surface, installed at the upper port of the water collection section. The lower end of the water screening plate is tangent to the air intake direction. The upper end of the plate is inclined upward along the airflow direction. The short side of the water sieve plate is straight and horizontally set perpendicular to the air intake direction, while the long side is arc-shaped and perpendicular to the short side. The arc surface of the water sieve plate is concave inward along the air intake direction, allowing the airflow to climb along the arc surface of the water sieve plate, ensuring low air intake resistance and facilitating the flow and collection of water droplets on the water sieve plate. The arc surface of the water sieve plate has multiple rows of sieve holes along the long side. Each row of sieve holes includes multiple sieve holes arranged along the short side of the water sieve plate. The sieve holes are straight groove holes, and the length of the straight groove holes is parallel to the short side of the water sieve plate. The upper edge of the sieve holes has a convex edge that protrudes towards the windward side of the water sieve plate. The sieve holes in adjacent rows of sieve hole groups are staggered, and the length of the sieve holes is greater than the distance between adjacent sieve holes in each row. A raised edge is provided on the upper edge of the screen holes to intercept the water film in the air inlet direction, ensuring that the water film can smoothly enter the screen holes; the staggered arrangement of the screen holes ensures that the vertical direction of the water film flow is covered by screen holes, so that most of the water adhering to the screen plate can enter the screen holes.

[0038] Based on the common structure of the above-mentioned water screening components, the detailed differences between the three water screening components are as follows: Figure 4 , Figure 5 As shown, the cross-section of the water intake portion of the first water collector 132 and the second water collector 142 at any position parallel to the air intake direction is slotted. The length of the slot is set along the air intake direction, and the windward side of the slot gradually shortens downwards and inwards along the vertical direction. That is, the windward side of the water intake portion is inclined towards the air intake channel, and the leeward side is set vertically. The windward side forms a certain windward angle with the air intake direction. Moreover, the water intake portion of the first water collector 132 and the second water collector 142 is a flat tube with a hollow interior. Its plane is parallel to the air intake direction, which reduces the obstruction area in the air intake direction, thus reducing the air intake resistance and making the air intake smoother. Correspondingly, the second water sieve plate 141 and the third water sieve plate 151 have water inlet holes. The lower end of the water intake portion of the first water collector 132 is connected to the water inlet hole on the second water sieve plate 141, and the lower end of the water intake portion of the second water collector 142 is connected to the water inlet hole on the third water sieve plate 151. At the same time, as Figure 1 , Figure 6As shown, the water intake part of the third water collection bucket 152 is a section of round pipe. A through hole is opened on the bottom wall of the horizontal section of the air intake channel. The lower end of the round pipe extends through the through hole to the bottom of the horizontal section of the air intake channel. A first duckbill valve 153 is installed at the lower end of the round pipe to discharge the water collected by the water screening component to the outside of the air intake channel.

[0039] Furthermore, a first guide plate 133 is provided on the lower edge of the first water screening plate 131, and a second guide plate 143 is provided on the lower edge of the second water screening plate 141. Both the first guide plate 133 and the second guide plate 143 include an upper blade and a lower blade. The upper blade and the lower blade are hinged together, and the hinge axis between them is horizontal and perpendicular to the air intake direction. The upper blade can be set in the water collection hopper of the water screening assembly or the windward end of the water screening plate. When no air enters, the lower blade is in a natural drooping state. When air enters, under the impact of the airflow, the lower blade swings towards the inside of the air intake duct with the airflow direction, forming an angle α with the airflow direction. The extreme horizontal position of the lower edge of the lower blade is not higher than the upper edge of the water screening plate in the adjacent water screening assembly below it. The lower blade can adaptively adjust the angle α according to the strength of the airflow impact force to achieve the best air intake effect. When the airflow impact force is weak, the included angle α is larger, resulting in more thorough airflow impact on the water screening plate and a more obvious separation effect. When the airflow impact force is strong, the included angle α is smaller, satisfying the air intake volume while ensuring low air intake resistance. In this embodiment, the included angle α is not less than the windward angle of the water inlet. Simultaneously, an air intake grille 12 is installed at the air inlet of the air intake duct 1. The outer contour of the air intake grille 12 matches the air inlet of the air intake duct, and its inner side is in contact with the windward end of the water screening assembly. An upper baffle 124 is provided at the upper part of the air intake grille 12, and the lower edge of the upper baffle 124 is not higher than the upper edge of the first water screening plate 131. A lower baffle 123 is provided at the lower part of the air intake grille 12, and the upper edge of the lower baffle 123 is not lower than the lower edge of the third water screening plate 151. By designing the guide vane and the edge of the air intake grille and the water sieve plate, the water sieve plate has a large sieve area in the air intake direction, so that the air entering the air intake can collide and contact the water sieve plate as much as possible to fully sieve water.

[0040] like Figure 2As shown, the water screening components are arranged from top to bottom, dividing the horizontal air intake passage of the intake manifold into three horizontal air intake channels. The first horizontal air intake channel is located between the upper inner wall of the air inlet and the first water screening component; the second horizontal air intake channel is located between the first and second water screening components; and the third horizontal air intake channel is located between the second and third water screening components. Due to the influence of engine back pressure, the airflow gradually increases from top to bottom in the vertical section of the horizontal air intake passage. The more impurities are entrained, the greater the flow resistance. That is, the horizontal air intake channels closer to the vertical section of the intake manifold have higher airflow rates. The greater the airflow, the more impurities are entrained, and the greater the flow resistance. Therefore, the airflow cross-sections on the inlet side of the first, second, and third horizontal air intake channels are arranged to increase sequentially, and the windward area of ​​the water sieving plate of the corresponding water sieving assembly is arranged to increase sequentially. The airflow cross-section on the inlet side of the first horizontal air intake channel is larger than the airflow cross-section on the outlet side, the airflow cross-section on the inlet side of the second horizontal air intake channel is basically the same as the airflow cross-section on the outlet side, and the airflow cross-section on the inlet side of the third horizontal air intake channel is smaller than the airflow cross-section on the outlet side, so as to improve the airflow uniformity of the horizontal air intake channels and reduce the intake resistance.

[0041] The water sieving principle of the water sieving assembly is as follows: Airflow carrying moisture, dust, and other impurities passes through the air intake grille and impacts the concave surface of the water sieving plate. Moisture in the airflow condenses and adheres to the water sieving plate, forming a water film. The airflow rises with the water sieving plate until it crosses the upper edge and enters the air intake channel. Simultaneously, some of the water film on the water sieving plate is blown by the airflow, rises along the plate, passes through the screen holes, and falls into the water collection hopper, then is discharged from the air intake channel by the first duckbill valve 153. Other water film slides down the water sieving plate to the air intake, is discharged from the air intake channel, or falls onto the lower water sieving plate, passes through the screen holes, enters the lower water collection hopper, and is discharged from the air intake channel by the first duckbill valve 153. The water removal effect is particularly noticeable when the airflow speed is relatively slow.

[0042] After initial water removal by the water screening component, the airflow enters the vertical section of the air inlet. The cross-sectional area of ​​the vertical section is smaller than that of the horizontal section, increasing the airflow velocity and providing a flow rate guarantee for subsequent water removal by the cyclone component, thus stabilizing the water removal efficiency of the cyclone component. A top plate 112 is formed by a partial indentation at the center line of the vertical section's symmetrical panel, extending into the air intake. The top plates 112 are vertically positioned along the airflow direction, with their opposing surfaces connected together. The cross-section of the top plates 112 is I-shaped, which strengthens the main panel of the air intake and reduces noise generated by the main panel. Simultaneously, the top plates 112 divide the vertical section into two vertical air intake channels, separating and streamlining the turbulent airflow entering the vertical section, improving the airflow uniformity of the vertical section's cross-section, and ensuring lower intake resistance. Furthermore, it increases the water film adhesion area on the inner wall of the vertical section, allowing the main body of the air intake to absorb more moisture. The lower end of the top plates 112 is connected to the inner wall of the vertical section via a slope, facilitating the flow of water droplets adsorbed on the inner surface of the top plates 112 into the first water collection tank.

[0043] like Figure 2 As shown, a water collection ring 17 is provided inside the air outlet of the vertical section of the air intake duct 1, and a tower-type water filter assembly 16 is installed on the water collection ring 17. Specifically, as shown... Figure 7 As shown, the tower-type water filtration assembly 16 includes a flow divider plate 161, multiple blades 162, and a connecting base 163 arranged sequentially from top to bottom. The multiple blades 162 are stacked vertically, and the flow divider plate and the uppermost blade, adjacent blades, and the connecting base and the lowermost blade are connected by vertical ribs, maintaining a certain height gap around each other to allow airflow to pass through. The blades 162 have an elongated oval outline, with the outer edges of the blades sloping downwards in an umbrella shape, and the center of the blades is hollow. The hollowed-out area in the center of the multiple stacked blades forms a continuous airflow channel communicating with the oil filter 4. The flow divider plate 161 is conical or ridge-shaped, placed above the uppermost blade, covering the hollowed-out area in the center of the uppermost blade, and the outer edge of the flow divider plate also slopes downwards in an umbrella shape. The outline area of ​​the flow divider plate and each blade gradually increases from top to bottom, with no gaps in the vertical projection, forming a tower structure that can quickly and evenly diffuse the airflow from above to all sides. The connecting base 163 is positioned below the lowest blade. A latch 164 is provided along the circumference of the connecting base. The water collecting ring 17 is a vertically continuous annular wall structure. The inner wall contour of the water collecting ring 17 matches the outer wall contour of the connecting base 163. A groove corresponding to the latch 164 is opened at the top of the annular wall of the water collecting ring 17. The connecting base 163 is nested inside the top of the water collecting ring 17 from top to bottom, and the connecting base 163 and the water collecting ring 17 are fastened together. A first water collecting groove is formed between the outer wall of the water collecting ring 17 and the inner wall of the vertical section of the air intake duct 1. A drain pipe is provided at the lowest horizontal position of the first water collecting groove, and a second duckbill valve 18 is installed on the drain pipe for draining water from the first water collecting groove.

[0044] The water removal principle of the tower-type water filter assembly is as follows: The airflow above the vertical section of the air intake duct 1 impacts the split plate 161 and the multi-layer blades 162 vertically downwards. The water in the airflow condenses on the upper surface of the split plate 161 and the blades 162, and flows from top to bottom along the edge angle of the split plate 161 and the blades 162 into the first water collection tank. The water that flows into the first water collection tank is then discharged to the outside of the air intake duct 1 through the second duckbill valve 18. At the same time, the airflow spreads rapidly and evenly in all directions along the edge angle of the split plate 161 and the blades 162. The airflow that spreads in all directions is blocked and reverses, passing through the height gap between the split plate and the uppermost blade, between adjacent blades, and between the connecting base and the lowermost blade, and enters the central hollow area, reaching the air inlet of the oil filter 4 below, thus achieving the effect of separating water and air.

[0045] The oil filter 4 has a swirl assembly at its air inlet, such as... Figure 8 , 9As shown, the swirl assembly includes a housing 411, a top cover 44, and a swirl fan 45. The housing and top cover have an elongated oval cross-section (i.e., racetrack shape). The housing 411 can be integrated into the outer shell of the oil filter 4. The top cover 44 is fastened to the top of the housing 411. The top cover 44 has two round holes on its panel, which are arranged side by side along the length of the top cover 44. Two swirl cylinders are provided below the round holes. The diameter of the round holes is smaller than the diameter of the swirl cylinders. A swirl fan 45 is installed in each of the two swirl cylinders. The swirl fan includes a mounting ring. A limiting block is provided on the inner wall of the swirl cylinder. The swirl fan is installed into the swirl cylinder from bottom to top. The upper edge of the mounting ring contacts the lower edge of the top cover panel, and the lower edge of the mounting ring contacts the upper edge of the limiting block, thus restricting the axial movement of the swirl fan. At the same time, an anti-rotation block is provided on the upper end face of the mounting ring, and an anti-rotation groove is provided on the inner edge of the round hole of the top cover panel. The anti-rotation block is embedded in the anti-rotation groove, thus restricting the axial rotation of the swirl fan. The swirl fan also includes a guide cone, located at the axial center of the mounting ring. The guide cone is narrower at the top and wider at the bottom, with a closed upper port and an open lower port, resembling a bullet shape, accelerating the upward airflow to diffuse evenly in all directions. Multiple swirl vanes are arranged circumferentially between the mounting ring and the guide cone. In the height direction, the upper edge of the mounting ring is at the same height as the upper edge of the swirl vanes, and the bottom of the swirl vanes is lower than the bottom of the mounting ring; that is, the lower half of the swirl vanes is not covered by the mounting ring. The housing 411 has two air inlet pipes 4112 inside, which are respectively facing the two cyclone cylinders. The inner diameter of the air inlet pipes is smaller than the inner diameter of the coaxial cyclone cylinders to prevent water separated by the cyclone fans from flowing into the air inlet pipes along the inner wall of the cyclone cylinders. The air inlet pipes are connected vertically and are connected to the inner cavity of the oil filter 4. A second water collection tank is formed between the inner wall of the housing and the outer wall of the air inlet pipes. The bottom height of the second water collection tank has a unidirectional decreasing trend to prevent water from accumulating in the water collection tank from not being completely drained. At the same time, a baffle 4114 is provided between the two air inlet pipes 4112. The upper surface of the baffle is higher than the lower surface of the cyclone cylinders to prevent the airflow in the two cyclone cylinders from interfering with each other and to prevent the water separated by the two cyclone fans from mixing before entering the second water collection tank, thus reducing the water separation efficiency. A drain pipe 47 is provided below the baffle, which is the lowest horizontal position of the bottom of the second water collection tank. The drain pipe 47 is connected to the outside of the oil filter.

[0046] The working principle of the cyclone assembly is as follows: When the airflow carrying residual moisture passes through the cyclone assembly, the guide cone of the cyclone fan accelerates the airflow and diffuses it radially along the cyclone blades. The airflow rotates at high speed from top to bottom. Under centrifugal force, the moisture gradually separates from the airflow and flows into the second water collection tank along the inner wall of the cyclone cylinder. The water collected in the second water collection tank is discharged to the outside of the oil filter through the drain pipe. At the same time, the airflow after moisture separation enters the oil filter along the axial direction of the cyclone cylinder through the air inlet pipe. Thus, the effect of separating moisture and air is achieved. The greater the airflow velocity, the more obvious the separation effect of the cyclone assembly.

[0047] Thus, the above structure achieves three-stage water removal in the air intake system.

[0048] Meanwhile, in this embodiment, such as Figure 10 ,11 As shown, the air filter 6 includes an air filter body 61 and an end cap 62. A filter element 63 is installed inside the air filter body 61. The air filter body 61 has a cylindrical structure. One end of the outer circumference of the air filter body 61 is provided with an air filter inlet 611. The cross-section of the air filter inlet 611 is elliptical, and the major axis of the ellipse is set along the axial direction of the air filter body. The air filter inlet 611 is tangent to the side wall of the air filter body 61. A portion of the outer circumference of the air filter body 61 is concave to form a guide portion 613. The guide portion is spirally arranged along the axial direction of the air filter body. The inner wall of the guide portion is in contact with the outer surface of the filter element or leaves a small gap. The end cap 62 has a protruding ring 623 on one side facing the inside of the air filter body 61. The closed end of the filter element 63 is embedded in the protruding ring 623, and the other end is installed in the sealing groove. The dust discharge port 64 is directly opposite the protruding ring 623.

[0049] This air filter, through its tangential air intake and internal spiral structure, effectively disperses airflow at the inlet, reducing intake resistance and minimizing direct impact on the filter element, thus preventing filter paper damage. It promotes a swirling airflow around the filter element from the inlet towards the end cap, extending the airflow path and ensuring thorough separation of impurities and air. The filter element at the convex ring has weaker adsorption force on impurities, while most impurities at the end cap fall into the dust discharge port under the combined action of gravity and centrifugal force, preventing separated impurities from being adsorbed onto the filter paper surface. This improves filter element utilization and ensures effective dust removal.

[0050] Example 2

[0051] Based on Embodiment 1, this embodiment further provides a commercial vehicle, such as... Figure 1 As shown, the commercial vehicle includes a frame 10 and a cab 11, and also includes the commercial vehicle air intake system provided in Embodiment 1. The frame includes two frame longitudinal beams. The air filter 6 is mounted on the top of the frame 10 through the air filter bracket 9. The oil filter 4 is mounted on one side of the frame 10 through the oil filter bracket 8. The outer wall of the air intake duct 1 is provided with multiple mounting plates 115, which are mounted on the rear panel of the cab 11 through the mounting plates 115. The air outlet of the air filter is connected to the engine of the commercial vehicle through the third connecting pipe 7.

[0052] As can be seen from the above embodiments, the beneficial effects of the present invention are as follows: By setting an air intake grille, a water sieving assembly, and a tower-type water filtration assembly in the L-shaped air intake duct, and by setting a vortex assembly at the oil filter inlet and a tangential air intake and internal spiral structure at the air filter inlet, the water and dust removal effect of the air intake system is greatly improved. Through the water sieving assembly, water droplets in the intake air collide with and adhere to the water sieving plate to form a water film. Driven by the airflow, the water film moves along the inclined angle of the water sieving plate and enters the water collection hopper through the screen holes, exiting the air intake duct. The separation effect of the water sieving assembly is significant when the airflow velocity is low. Through the tower-type water filtration assembly, residual moisture in the air is separated by gravity and airflow. Under the influence of airflow, the air impacts and adheres to the splitter plate and blades, flowing from top to bottom along the edge angle of the splitter plate and blades into the first water collection tank and then out of the intake duct. Through the swirl assembly, the airflow undergoes a swirling motion, and the residual moisture in the air flows into the second water collection tank along the inner wall of the swirl cylinder under centrifugal force and is discharged out of the oil filter. When the airflow velocity is high, the separation effect of the swirl assembly is obvious. Through tangential air intake and internal spiral structure, the airflow is made to swirl around the filter element along the direction of the air inlet towards the end cover, which can promptly disperse the airflow at the air inlet, protect the filter paper, reduce air intake resistance, and accelerate the discharge of impurities out of the air filter. When the airflow velocity is high, the separation effect of the air filter is obvious. This solution fully utilizes airflow patterns, employing a three-stage water removal assembly and a tangential air intake and internal spiral structure in the air filter to gradually separate moisture from the air. It effectively removes water regardless of airflow velocity, while simultaneously improving the removal of dust and other impurities. This significantly reduces the moisture and dust content of the air entering the oil filter and air filter, ensuring their service life and the engine's combustion performance. Furthermore, the commercial vehicle provided by this invention features the aforementioned air intake system, resulting in clean and dry engine air intake and improved power performance.

[0053] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A commercial vehicle intake system, comprising an intake duct (1), an oil filter (4), and an air filter (6) connected sequentially along the airflow direction, characterized in that, The air inlet of the air intake (1) is set horizontally, and a water sieving assembly is provided inside the air inlet. The water sieving assembly includes a water sieving plate and a water collecting hopper. The water collecting hopper is connected vertically. The water sieving plate is set at the top opening of the water collecting hopper. The water sieving plate is set inclined upward along the air intake direction. The water sieving plate is provided with multiple sieve holes. The bottom of the water collecting hopper is connected to the outside of the air intake (1). The air outlet of the air inlet (1) is vertically arranged, and a tower-type water filter assembly (16) is provided inside the air outlet. The tower-type water filter assembly (16) includes multiple stacked blades, the outer edge of the blades is inclined downward, and a first water collection tank is provided below the bottommost blade. The first water collection tank is connected to the outside of the air inlet (1). The air outlet of the air inlet (1) is connected to the air inlet of the oil filter (4). The air inlet of the oil filter (4) is provided with a swirling assembly, which includes a swirling fan. A second water collection tank is provided below the swirling fan and is connected to the outside of the oil filter (4).

2. The commercial vehicle intake system according to claim 1, characterized in that, The water screening assembly is provided in at least two, and the water screening assemblies are arranged vertically. The water screening plate of the water screening assembly located below has a water inlet, and the water inlet is connected to the lower end of the water collection bucket of the water screening assembly located above. The lower end of the water collection bucket of the water screening assembly located at the bottom is provided with a first duckbill valve (153), and the first duckbill valve (153) passes through the outer wall of the air intake (1). The water screening plate is curved into an arc shape along the air intake direction. The water screening assembly located above is also equipped with a guide plate. The guide plate includes an upper blade and a lower blade that are hinged to each other. The upper blade is connected to the water screening plate or the water collection hopper. The hinge axis between the upper blade and the lower blade is set horizontally and perpendicular to the air intake direction. The highest point of rotation of the lower edge of the lower blade is not higher than the upper edge of the water screening plate in the adjacent water screening assembly below.

3. The commercial vehicle air intake system according to claim 1, characterized in that, The sieve holes are straight groove holes, which are set horizontally along their length. The upper edge of the sieve holes has a raised edge that protrudes towards the windward side of the sieve plate.

4. The commercial vehicle air intake system according to claim 3, characterized in that, The sieve holes are arranged in multiple rows along the length of the sieve plate, with the sieve holes in adjacent rows being staggered, and the length of the sieve holes being greater than the distance between adjacent sieve holes in each row.

5. The commercial vehicle intake system according to claim 1, characterized in that, The air intake of the air intake duct is provided with an air intake grille (12), the outline of which is adapted to the air intake of the air intake duct. The upper part of the air intake grille is provided with an upper baffle (124), the lower edge of which is not higher than the upper edge of the uppermost water sieve plate; the lower part of the air intake grille (12) is provided with a lower baffle (123), the upper edge of which is not lower than the lower edge of the lowermost water sieve plate.

6. The commercial vehicle intake system according to claim 1, characterized in that, The water collection hopper includes an internally connected water collection section and a water intake section. The water collection section is located above the water intake section, and the water screening plate is installed on the top surface of the water collection section. The longitudinal section of the bottom of the water collection section perpendicular to the air intake direction is V-shaped, and the cross section of the water intake section parallel to the air intake direction is slot-shaped and connected to the V-shaped bottom of the water collection section. The length of the slot of the water intake section is set along the air intake direction and gradually shortens downward in the vertical direction. The windward side of the water intake section is inclined towards the inside of the air intake channel.

7. The commercial vehicle intake system according to claim 1, characterized in that, The air outlet of the air intake (1) is provided with a water collection ring (17), which is connected vertically. The outer wall of the water collection ring and the inner wall of the air intake form a first water collection trough. The bottom of the first water collection trough is also provided with a drain pipe, which is connected to the outside of the air intake. The outline area of ​​each blade of the tower-type water filter assembly (16) gradually increases from top to bottom. A diversion plate (161) is provided above the uppermost blade, and a connecting base (163) is provided below the lowermost blade. The connecting base (163) is fastened to the top of the side wall of the water collection ring (17).

8. The commercial vehicle intake system according to claim 1, characterized in that, The swirl assembly includes a housing (411) and a top cover (44). The housing (411) is hollow inside and open on the top surface. The top cover (44) is installed on the top of the housing (411). The cross-section of the housing (411) and the top cover (44) is an elongated hole. A swirl fan (45) is installed in the top cover. There are at least two swirl fans. Multiple swirl fans are arranged side by side along the length of the elongated hole in the housing. An air inlet pipe (4112) is provided in the housing corresponding to the position of the swirl fan. The air inlet pipe passes through the bottom plate of the housing. The number of air inlet pipes corresponds to the number of swirl fans. A partition (4114) is provided between adjacent air inlet pipes. A second water collection tank is formed between the inner wall of the housing and the outer wall of the air inlet pipe. A drain pipe (47) is also provided at the bottom of the second water collection tank. The drain pipe is connected to the outside of the oil filter. The swirl fan (45) includes a mounting ring, a top cover (44) is provided with a swirl tube, the mounting ring is embedded in the swirl tube, a guide cone is provided at the axial position of the mounting ring, and multiple swirl vanes are provided circumferentially between the mounting ring and the guide cone.

9. The commercial vehicle intake system according to claim 1, characterized in that, The intake (1) is L-shaped, including a horizontal section and a vertical section. The cross-sectional area of ​​the horizontal section is larger than that of the vertical section. A set of opposite sidewalls of the vertical section are recessed into the vertical section to form a top plate. The length direction of the top plate is along the vertical direction, and the top surfaces of the top plates are in contact with each other.

10. The commercial vehicle intake system according to claim 1, characterized in that, The air filter (6) includes an air filter body (61) and an end cap (62). A filter element (63) is installed inside the air filter body (61). The air filter body (61) is a cylindrical structure. An air filter inlet is provided at one end of the outer circumference of the air filter body (61). The cross-section of the air filter inlet is elliptical. The major axis of the ellipse is set along the axial direction of the air filter body. A portion of the outer circumference of the air filter body (61) is concave to form a guide part (613). The guide part is spirally arranged along the axial direction of the air filter body. The inner wall of the guide part is in contact with or leaves a small gap with the outer surface of the filter element (63). A convex ring (623) is provided on one side of the end cap (62) facing the inside of the air filter body (61). One end of the filter element (63) is embedded in the convex ring (623), and the other end is installed in the sealing groove. The dust discharge port (64) is directly opposite the convex ring (623).

11. A commercial vehicle, comprising a frame (10) and a cab (11), characterized in that, It also includes the commercial vehicle air intake system as described in any one of claims 1-9, wherein the oil filter (4) and the air filter (6) are mounted on the frame (10) and the air intake duct (1) is mounted on the rear panel of the cab (11).

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