Air inlet system with waterproof valve, vehicle and air inlet control method

Abstract

The invention discloses an air inlet system with a waterproof valve, a vehicle and an air inlet control method, and relates to the technical field of automobile air inlet systems, the air inlet system comprises an air inlet pipe assembly, an air filter assembly and an air guide pipe assembly which are connected in sequence, and the air guide pipe assembly is provided with an electric control waterproof valve; the electric control waterproof valve comprises a control motor and a valve plate assembly rotationally connected with the control motor, the valve plate assembly comprises an integrated turning plate, a valve body sealing ring is arranged on the outer side of the integrated turning plate, and a tooth-shaped structure and a protruding structure are sequentially arranged on the peripheral side of the valve body sealing ring. When the valve plate assembly is located at the closing position, the protruding structure is used for being sealed with the wall face of the air guiding pipe assembly, and the tooth-shaped structure is used for being sealed with the inner circle face of the air guiding pipe assembly. The electric control waterproof valve forms double sealing, so that the sealing performance is more reliable; under the conditions of floating sailing and the like, the waterproof performance of the air inlet system can be improved.

Description

Technical Field

[0001] This invention relates to the field of automotive intake system technology, and more particularly to an intake system with a waterproof valve, a vehicle, and an intake control method. Background Technology

[0002] The main function of a car's air intake system is to filter dust and impurities from the air, reduce the impact of noise generated during the intake process on road noise and cabin noise, and meet the vehicle's wading requirements. Traditionally, a car's wading depth depends directly on factors such as the height of the air intake. To improve wading performance, aftermarket modifications or factory-installed snorkels are typically added, extending the air intake directly to the roof height via a long pipe. However, the throttle-type centrally located waterproof valve, due to structural limitations, cannot meet the requirements for complete water sealing and valve protection.

[0003] With the continuous advancement of automotive technology, the buoyancy navigation mode of vehicles is attracting increasing attention. Hybrid vehicles offer advantages in terms of high wading depth and buoyancy, utilizing only battery power in buoyancy mode to shut off the engine and prevent irreversible damage. Current technologies, such as raising the air intake position, are limited by space constraints and can only increase wading depth, not buoyancy. Using a snorkel for wading requires specialized disassembly and modification, carries high sealing risks, and lengthening the air intake increases intake resistance, resulting in a slight decrease in power and increased fuel consumption. Snorkels can only increase the upper limit of wading capability, not buoyancy. Throttle-type centrally located waterproof valves are mainly used for incomplete gas sealing; however, they have low reliability in sealing water in dirty environments, are difficult to completely seal, and require excessive motor force. Summary of the Invention

[0004] In view of the shortcomings of the existing technology, the purpose of this invention is to provide an air intake system, vehicle and air intake control method with a waterproof valve. The electronically controlled waterproof valve forms a double seal, which makes the sealing performance more reliable. In situations such as floating navigation, it can improve the waterproof performance of the air intake system.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solution: In a first aspect, embodiments of the present invention provide an air intake system with a waterproof valve, comprising an air intake pipe assembly, an air filter assembly, and an air vent pipe assembly connected in sequence, wherein the air vent pipe assembly is equipped with an electrically controlled waterproof valve; The electrically controlled waterproof valve includes a control motor and a valve plate assembly rotatably connected to the control motor. The valve plate assembly includes an integrated flap, and a valve body sealing ring is provided on the outer side of the integrated flap. The valve body sealing ring is provided with a toothed structure and a raised structure in sequence on its periphery. When the valve plate assembly is in the closed position, the raised structure is used to form a seal with the wall of the air vent assembly, and the toothed structure is used to form a seal with the inner circular surface of the air vent assembly.

[0006] As a further implementation, the valve body sealing ring and the valve plate assembly have a concave-convex structure for mating.

[0007] As a further implementation, the valve plate assembly is provided with a limiting protrusion, and the sealing protrusion of the valve body sealing ring fits against the limiting protrusion.

[0008] As a further implementation, a protective mesh frame is installed at the end of the air intake pipe assembly away from the air filter assembly.

[0009] As a further implementation, the air filter assembly includes an upper housing, a lower housing, and a filter element installed between the upper housing and the lower housing; The lower housing is fitted with a one-way waterproof membrane.

[0010] As a further implementation, the filter element has a filter element PU layer on the outside, and the filter element PU layer forms a sealed fit with the upper housing.

[0011] As a further implementation, the intake pipe assembly and the bleed pipe assembly are respectively fixed to the air filter assembly by clamps, and an air filter sealing ring is installed at the clamp.

[0012] Secondly, embodiments of the present invention also provide a vehicle equipped with the aforementioned intake system with a waterproof valve, the intake system being connected to an engine.

[0013] As a further implementation, the control motor is connected to the vehicle control unit.

[0014] Thirdly, embodiments of the present invention also provide a vehicle intake control method, using the aforementioned vehicle, comprising: The water level sensor detects water depth data and sends it to the vehicle control unit; The vehicle control unit sends water depth data to the control motor, which drives the valve plate assembly of the electronically controlled waterproof valve to rotate to the closed position; at the same time, the engine control unit controls the engine to shut down. After the water in the bleed air tube assembly is drained, the control motor drives the valve plate assembly to rotate in the opposite direction, opening the bleed air tube assembly.

[0015] The beneficial effects of this invention are as follows: (1) The air intake pipe assembly of the present invention is equipped with an electronically controlled waterproof valve, which controls the opening and closing of the air intake by controlling the forward and reverse rotation of the valve plate assembly; the outer side of the integrated flap is provided with a valve body sealing ring, and the circumference of the valve body sealing ring is provided with a toothed structure and a raised structure. When the valve plate assembly is in the closed position, the raised structure forms a seal with the wall of the air intake pipe assembly, and the toothed structure forms a seal with the inner circular surface of the air intake pipe assembly, thereby achieving double sealing at the waterproof valve and enhancing the sealing performance; at the same time, the toothed structure also has a self-cleaning function; when the vehicle is using electricity to wade through water or float on water, the control motor is started to drive the valve to close, sealing the air intake pipe, improving the waterproof performance of the air intake system, and preventing water from damaging the engine through the air intake system.

[0016] (2) The air filter assembly of the present invention is equipped with a one-way waterproof membrane, which has the functions of dust and water discharge during normal vehicle use and sealing the air filter when it is required for floating navigation; together with the toothed sealing ring of the waterproof valve and the protective mesh frame at the air intake, the overall sealing performance of the system is more reliable.

[0017] (3) When the vehicle is wading, floating or sailing, the water level sensor detects the water depth and sends a signal to the vehicle control unit. The vehicle control unit determines that the engine and intake system need to be shut down. The vehicle control unit sends an instruction to the engine control unit. The engine control unit sends the instruction to the waterproof valve and shuts down the engine. The waterproof valve controls the motor to drive the rotating shaft to rotate and close the valve. The detection signal of the water level sensor is used as the trigger source to achieve precise control of waterproof protection and will not affect the intake efficiency of the engine under normal operating conditions. Attached Figure Description

[0018] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an improper limitation of the invention.

[0019] Figure 1 This is a schematic diagram of the air intake system with a waterproof valve according to one or more embodiments of the present invention; Figure 2 This is a schematic diagram of the air filter assembly structure according to one or more embodiments of the present invention; Figure 3 This is a schematic diagram of the structure of the electrically controlled waterproof valve according to one or more embodiments of the present invention; Figure 4(a) is a schematic diagram of the valve plate assembly structure according to one or more embodiments of the present invention; Figure 4(b) is a cross-sectional view of the valve plate assembly according to one or more embodiments of the present invention; Figure 5 This is a control flowchart of an electrically controlled waterproof valve according to one or more embodiments of the present invention.

[0020] Among them, 1. intake pipe assembly, 2. first clamp, 3. air filter assembly, 4. second clamp, 5. bleed pipe assembly, 6. electronically controlled waterproof valve; 31. Upper housing; 32. First screw; 33. Filter element; 34. Air filter sealing ring; 35. One-way waterproof membrane; 36. Lower housing; 37. Silencer core; 51. Air duct body; 52. Protective mesh frame; 61. Control motor; 62. Rear cover; 63. Bushing; 64. Valve plate assembly; 65. Second screw. 331, PU layer of filter element; 511, wall surface; 512, inner circular surface; 641, valve body sealing ring; 642, integrated flap; 6411, Second concave annular groove; 6412, Second convex annular groove; 6413, Sealing protrusion; 6414, Toothed structure; 6421, First concave annular groove; 6422, First convex annular groove; 6423, Limiting protrusion; 6424, Flip plate; 6425, Rotating shaft. Detailed Implementation

[0021] It should be noted that the following detailed description is illustrative and intended to provide further explanation of the invention. Unless otherwise specified, all technical and scientific terms used in this invention have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains.

[0022] For ease of description, the terms "upper," "lower," "front," and "rear" appearing in this invention only indicate that they correspond to the upper, lower, front, and rear directions in the accompanying drawings, and do not limit the structure. They are merely for the purpose of facilitating and simplifying the description of this invention, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention. In the description of this invention, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0023] Terminology Explanation: Filter element PU layer: Made of polyurethane material; PP-T20: Abbreviation for 20% talc-filled modified polypropylene (PP).

[0024] Example 1: To improve a vehicle's wading performance, existing technologies typically raise the position of the air intake inlet of the air duct. However, due to space limitations, this only increases the wading height and cannot meet the requirements for floating navigation. Furthermore, existing air intake systems with waterproof valves have low reliability in sealing water in dirty environments and require excessive motor force.

[0025] Based on this, this embodiment provides an air intake system with a waterproof valve, such as... Figure 1As shown, the assembly includes an intake pipe assembly 1, an air filter assembly 3, and an air bleed pipe assembly 5. The intake pipe assembly 1 is connected to one side of the air filter assembly 3 via a first clamp 2, and the air bleed pipe assembly 5 is connected to the other side of the air filter assembly 3 via a second clamp 4. Air filter sealing rings 34 are installed at the mating points of the first clamp 2 and the second clamp 4 with the pipes for sealing. Both the first clamp 2 and the second clamp 4 are worm gear clamps to ensure the sealing of the assembly between components.

[0026] like Figure 2 As shown, the air filter assembly 3 includes an upper housing 31, a filter element 33, a lower housing 36, and a muffler core 37. The muffler core 37 is welded into the upper housing 31, meaning the upper housing 31 integrates a muffler, which can effectively reduce intake system noise and meet the overall vehicle noise requirements. A one-way waterproof membrane 35 is installed at the bottom of the lower housing 36, enabling one-way drainage and dust removal. The thickness and material of the one-way waterproof membrane 35 are selected according to actual requirements. In this embodiment, the thickness of the one-way waterproof membrane 35 is 0.8mm, and the material is FVMQ (fluorosilicone rubber), which has characteristics such as resistance to high and low temperatures and chemical corrosion, while also being waterproof and breathable.

[0027] The filter element 33 is located at the junction of the upper housing 31 and the lower housing 36. The edge of the filter element 33 has a boss structure, and a filter element PU layer 331 is sleeved on the outside of the boss structure. The upper housing 31, the filter element 33, and the lower housing 36 are connected by a plurality of evenly distributed first screws 32. The filter element PU layer 331 is interference-fitted with the upper housing 31, so that the filter element PU layer 331 plays a sealing role. The filter element PU layer 331 achieves a complete seal when the upper housing 31 and the lower housing 36 are assembled.

[0028] In this embodiment, the sealing interference between the filter element PU layer 331 and the upper housing 31 is 2.5mm; the distance between adjacent first screws 32 is less than or equal to 150mm; the first screws 32 ensure a firm assembly of the upper housing 31, filter element 33, and lower housing 36, thereby ensuring a sealing effect in conjunction with the filter element PU layer 331. The air filter assembly 3 in this embodiment can achieve a water intake of less than 5ml for 2 hours underwater at a depth of 0.5m.

[0029] In this embodiment, the air intake tube assembly 5 is equipped with an electrically controlled waterproof valve 6. In this embodiment, the electrically controlled waterproof valve 6 is fixed to the air intake tube assembly 5 by screws. Figure 3As shown, the electrically controlled waterproof valve 6 is a gate-type electrically controlled waterproof valve, including a control motor 61, a rear cover plate 62, and a valve plate assembly 64. Bushings 63 are installed at both ends of the valve plate assembly 64, and mounting grooves are provided at both ends of the rear cover plate 62, with the bushings 63 positioned within the corresponding mounting grooves. The output shaft of the control motor 61 passes through the bushings 63 and the rotating shaft 6425 of the valve plate assembly 64. The rotating shaft 6425 meshes with the output shaft of the control motor 61 via a gear assembly. The control motor 61 drives the rotating shaft 6425 to rotate, thereby rotating the valve plate assembly 64. The control motor 61 is connected to the air vent assembly 5 via a second screw 65. The forward and reverse rotation of the control motor 61 drives the valve plate assembly 64 to rotate, thus opening and closing the air vent assembly 5.

[0030] In this embodiment, the control motor 61 is connected to the vehicle control unit via LIN communication, CAN communication, or other communication methods. The control motor 61 is activated according to vehicle signals to drive the valve to open and close. When the intake system is open, it provides the engine with clean gas required for combustion; when the intake system is closed, it prevents water from entering the air filter assembly 3 and the engine interior. The control motor 61 is also equipped with an angle sensor, which detects whether the opening and closing angles are correct and sends a feedback signal to the vehicle control unit.

[0031] like Figure 1 As shown, the air intake tube assembly 5 includes an air intake tube body 51. A protective mesh frame 52 is installed at the outlet of the air intake tube body 51 to prevent large foreign objects from entering the air intake tube, thereby blocking the normal rotation of the valve plate assembly 64. In this embodiment, the protective mesh frame 52 is injection molded, and its shape is adapted to the outlet shape of the air intake tube body 51, for example, it is rectangular. The protective mesh frame 52 is made of PP-T20 material, which has high rigidity and dimensional stability, and is heat-resistant and creep-resistant.

[0032] The air bleed pipe assembly 5 has several water leakage holes in the pipe section before the sealing surface of the valve plate assembly 64. When the vehicle closes the valve to release water, the water accumulated in the air bleed pipe before the valve is discharged through the water leakage holes. The number and size of the water leakage holes can be set according to the actual situation. In this embodiment, two water leakage holes with a diameter of 13mm are provided.

[0033] As shown in Figures 4(a) and 4(b), the valve plate assembly 64 includes an integrated flap 642, which is formed by integrating a disc-shaped flap 6424 with a rotating shaft 6425, using integral injection molding. In this embodiment, the integrated flap 642 is made of PA66-GF30 material, which has excellent mechanical properties and good heat resistance, making it suitable as an injection molding material. A valve body sealing ring 641 is fitted on the outer side of the flap 6424. It should be noted that the valve body sealing ring 641 and the air filter sealing ring 34 in this embodiment are named according to the functional components corresponding to their installation positions for ease of description, and do not impose any limitations on the structure of the sealing rings themselves.

[0034] As shown in Figures 4(a) and 4(b), one end of the flap 6424 has a limiting protrusion 6423, which makes the cross section of the flap 6424 form a stepped structure, and the valve body sealing ring 641 is limited by the limiting protrusion 6423. The outer circumference of the main body of the flap 6424 (excluding the limiting protrusion 6423) is provided with two first concave annular grooves 6421 and one first convex annular groove 6422, with the first convex annular groove 6422 located between the two first concave annular grooves 6421. The inner wall of the valve body sealing ring 641 is adapted to the outer circumference of the flap 6424, that is, the inner wall of the valve body sealing ring 641 is provided with two second concave annular grooves 6411 and one second convex annular groove 6412. The flap 6424 and the valve body sealing ring 641 correspond to each other, forming a concave-convex interlocking structure. Compared with simple surface contact fit, its structure has a stronger interlocking force. Under equipment vibration conditions, the interlocking structure can suppress the relative micro-movement between the flap 6424 and the valve body sealing ring 641, reduce the wear of the mating surface, and extend the service life of the seal.

[0035] The mating end of the valve body sealing ring 641 and the flap limiting protrusion 6423 is the sealing protrusion 6413. In this embodiment, both the sealing protrusion 6413 and the limiting protrusion 6423 are annular structures and protrude radially relative to the valve body sealing ring 641 and the flap 6424. The part of the valve body sealing ring 641 other than the sealing protrusion 6413 is the main body of the valve body sealing ring 641. A toothed structure 6414 is provided on the outer side of the main body of the valve body sealing ring 641 to enhance its sealing performance. When the flap 6424 rotates to the closed position relative to the air bleed pipe body 51, the sealing protrusion 6413 of the valve body sealing ring 641 forms a seal with the wall surface 511 of the air bleed pipe body 51, and the toothed structure 6414 forms a seal with the inner circular surface 512 of the air bleed pipe body 51. The two work together to prevent water from entering the air bleed pipe, thereby preventing water from entering the engine. Meanwhile, the toothed structure 6414 can also scrape and clean the sealing surface of the pipeline during the flipping process.

[0036] In this embodiment, the air intake pipe assembly 5 with a gate-type electronically controlled waterproof valve starts the control motor 61 to drive the valve plate assembly 64 to rotate forward and backward according to the input vehicle signal. When rotating forward, the valve plate assembly 64 is interference-fitted with one side wall of the air intake pipe to seal the air intake pipe, and when rotating backward, it opens the air intake channel. The angle sensor of the control motor 61 detects whether the opening and closing angles are in place and feeds back the signal. It has the functions of double sealing of the waterproof valve sealing ring and self-cleaning of the toothed sealing ring. At the same time, the air intake port of the air intake pipe assembly 5 is welded with a protective mesh frame 52 to protect the valve body. After the valve is closed, the entire air intake system is sealed and waterproof, enabling the air intake system to meet the high water wading, floating and navigation requirements of new energy vehicles.

[0037] In this embodiment, a one-way waterproof membrane 35 is added to the lower housing 36 of the air filter assembly 3, which serves to seal the air filter during normal vehicle use (dust and water drainage) and when sealing is required for floating navigation. An electronically controlled waterproof valve 6 is added to the intake system. The valve body sealing ring 641 in the electronically controlled waterproof valve 6 forms a double seal, wherein the sealing protrusion 6413 seals with the bleed pipe wall 511, and the side toothed structure 6414 seals with the inner circular surface 512 of the bleed pipe, enhancing the sealing performance. The protective mesh frame 52 at the bleed pipe opening and the toothed valve body sealing ring 641 of the valve plate assembly 64 form double protection, making the overall sealing performance of the system more reliable. When the new energy vehicle is using electricity for high-altitude wading or floating navigation, the control motor 61 is activated to drive the valve plate assembly 64 to close the pipeline, improving the waterproof performance of the intake system and preventing water from damaging the engine through the intake system. The electrically controlled waterproof valve 6 achieves precise sealing of the air intake pipe through the sealing protrusion 6413 of the valve body sealing ring 641 and the toothed structure 6414. The one-way waterproof membrane 35 achieves auxiliary sealing of the air filter cavity by relying on its own material elasticity, forming multiple protections.

[0038] In summary, this embodiment employs a multi-stage sealing method, utilizing clamps and sealing rings, an interference fit of the filter element PU layer 331, and a combination of concave-convex fitting and toothed seals on the valve plate assembly 64. This effectively improves the system's sealing performance and prevents impurities and moisture from entering the engine and affecting combustion efficiency. Specifically, the connection points between the intake manifold assembly 1 and the air filter assembly 3, and between the bleed air manifold assembly 5 and the air filter assembly 3, are sealed at the pipe joints through the fastening action of clamps and the air filter sealing ring 34. Utilizing the structural characteristics of the worm gear clamp, the fastening force can be evenly transmitted to the sealing surface, avoiding localized sealing failure. The PU layer at the edge of the filter element 33 is interference-fitted with the upper housing 31, and combined with evenly distributed circumferential screws, forms a sealed and fitted overall structure between the upper housing 31, the filter element 33, and the lower housing 36, effectively preventing unfiltered air from flowing around the filter element and entering the engine.

[0039] The valve body sealing ring 641 of the electrically controlled waterproof valve 6 forms a precise fit with the flap 6424 through the concave and convex ring groove. At the same time, its outer toothed structure 6414 fits and seals with the inner circular surface 512 of the air intake pipe, and the sealing protrusion 6413 abuts and seals with the wall surface 511 of the air intake pipe, forming a multi-layer sealing protection structure. With the help of the electric control drive, the valve can be opened and closed precisely, and can reliably block water intrusion under extreme working conditions such as wading.

[0040] In this embodiment, the air filter assembly 3 integrates a muffler core 37 and a one-way waterproof membrane 35. The muffler core 37 can directly reduce the noise of the intake airflow, attenuating the noise generated by intake pulsation, without the need for additional noise reduction components. The one-way waterproof membrane 35 is installed at the bottom of the lower housing 36, which can discharge the dust intercepted by the filter element 33 and the water vapor condensed in the airflow in one direction while ensuring normal air intake, avoiding dust accumulation that could cause filter element blockage and water vapor retention that could corrode system components.

[0041] Therefore, when a vehicle equipped with the air intake system of this embodiment is driven in pure electric mode, it can achieve high wading speed, buoyancy, and navigation without the need to modify the snorkel or install other waterproofing measures.

[0042] Example 2: This embodiment provides a vehicle equipped with the intake system with a waterproof valve as described in Embodiment 1. The intake system with the waterproof valve is connected to the engine's intake manifold to provide clean and dry air for engine combustion. The intake system is located in the front left side of the vehicle's engine compartment, away from high-temperature components such as the engine exhaust manifold, to avoid the high temperature affecting the intake air temperature and the performance of the system's rubber components (seals, waterproof membranes).

[0043] Specifically, the outlet end of the air intake pipe assembly 5 is sealed to the engine intake manifold, and the air filter sealing ring 34 at the mating point adopts a stepped sealing structure, which is adapted to the end face groove of the intake flange. The air filter assembly 3 of the intake system is located adjacent to the vehicle radiator on the right side. To prevent the hot air generated by the radiator from flowing back into the intake system, a heat-insulating guide plate is provided between them, which can guide the hot air discharged from the radiator to flow towards the rear of the engine compartment, while reducing the impact of external hot air on the intake temperature. In this embodiment, a buffer pad is provided on the inside of the engine hood corresponding to the position of the air filter assembly 3, which can limit the vertical displacement of the intake system and provide cushioning protection in the event of a vehicle collision or bump.

[0044] The control motor 61 of the electronically controlled waterproof valve 6 is electrically connected to the vehicle control unit via a wiring harness connector. The LIN / CAN communication interface of the control motor 61 is directly connected to the vehicle communication bus. The signal output terminal of the angle sensor is connected to the signal acquisition terminal of the vehicle control unit to achieve real-time feedback of the valve's opening and closing angle. The vehicle control unit controls the opening and closing state of the electronically controlled waterproof valve 6 based on the detection signal from the water level sensor.

[0045] Based on the sealing and waterproof performance of the air intake system, the vehicle in this embodiment can meet the requirements of new energy vehicles for wading, floating, and navigation.

[0046] Example 3: This embodiment provides a vehicle intake control method, such as... Figure 5As shown, when the vehicle is wading, floating, or navigating in water, the water level sensor detects the water depth data and transmits the detection signal to the VCC (Vehicle Control Unit). When the VCC determines that the engine and intake system need to be shut down, it sends a shutdown command to the EMS (Engine Control System). The EMS then transmits the shutdown command to the electronically controlled waterproof valve 6 and shuts down the engine. The control motor 61 of the electronically controlled waterproof valve 6 drives the rotating shaft to rotate and close the valve, shutting off the intake pipe. The angle sensor feeds back an angle signal to the EMS. The electronically controlled waterproof valve 6, the one-way waterproof diaphragm 35, and other sealing measures seal the entire intake system, preventing water from entering the engine.

[0047] During the water discharge process, the water accumulated in the pipeline before the electronically controlled waterproof valve 6 is discharged from the water leakage hole of the air intake pipe assembly 5. After the water discharge, if the engine needs to be used, the VCC (engine control unit) determines and transmits a command to the EMS (engine control unit). The EMS (engine control unit) transmits an opening command to the electronically controlled waterproof valve 6, and the flap in the valve plate assembly 64 rotates 90° to open the air intake passage.

[0048] Specifically, it includes the following processes: (1) Operating condition identification and signal acquisition stage: During vehicle operation, a water level sensor located on the front chassis collects water depth data along the driving path in real time, while a vehicle speed sensor collects the vehicle's current speed and a humidity sensor near the air intake system collects ambient humidity data. The sensors convert the collected analog signals into digital signals and transmit them synchronously to the VCC via the vehicle communication bus to form a working condition monitoring data set.

[0049] Among them, the water level sensor can accurately identify dangerous working conditions such as high wading (water depth > 500mm), floating (water depth 300~500mm), or navigation (water depth > 800mm). (2) Shutdown control phase under hazardous operating conditions: After receiving signals from various sensors, the VCC detects that the water depth data has reached any of the preset danger thresholds (deep wading threshold, buoyancy threshold, or navigation threshold), and combines this with vehicle speed signals (vehicle speed < 3 km / h, determined to be low-speed wading or stationary wading) and humidity signals (humidity > 95%, determined to be a high-humidity wading environment), and comprehensively determines that the vehicle is in an unsafe driving state and needs to shut down the engine and intake system, the VCC immediately sends a control command containing "engine stop, intake system shut down" to the EMS. After receiving the command, the EMS first verifies the validity of the command, and if the verification is successful, it executes the operation in two ways: One path sends a shutdown command to the engine, controlling the engine fuel supply system to cut off the fuel supply and the ignition system to stop ignition, thus achieving a smooth engine shutdown; the other path sends a closing command to the electronically controlled waterproof valve 6 via LIN / CAN communication. (3) Intake system sealing and protection stage: After receiving the EMS closing command, the control motor 61 of the electrically controlled waterproof valve 6 drives the rotating shaft 6425 of the valve plate assembly 64 to rotate, and the flap 6424 rotates synchronously. The valve body sealing ring 641 sleeved on its outer side gradually comes into contact with the inner wall of the air vent assembly 5.

[0050] Meanwhile, the angle sensor installed at the output end of the control motor 61 collects the rotation angle signal of the rotating shaft 6425 in real time; when the angle signal fed back by the angle sensor reaches 0° (i.e., the flap is completely closed), the EMS sends a stop command to the control motor 61, and the control motor 61 stops running, completing the valve closing action. At this time, the electrically controlled waterproof valve 6 achieves double sealing by the sealing protrusion 6413 of the valve body sealing ring 641 abutting against the air vent wall 511 and the toothed structure 6414 fitting against the inner circular surface 512 of the air vent, achieving double sealing; at the same time, the one-way waterproof membrane 35 at the bottom of the air filter assembly 3 is in a naturally closed state, achieving sealing of the air filter cavity. (4) Water discharge and drainage stage: When the vehicle leaves the dangerous water area and enters the water discharge process, the inertia generated by the vehicle's movement and the air pressure difference between the inside and outside of the air intake system cause the water accumulated in the front pipe of the electronically controlled waterproof valve 6 to gather and be discharged from the water leakage hole of the air intake pipe assembly 5. During the drainage process, the one-way waterproof membrane 35 remains closed under the action of the gravity of the accumulated water and the internal air pressure, preventing the outside air from carrying water vapor back into the air filter assembly 3. (5) Normal intake phase: After the water discharge is completed, if the driver needs to restart the engine, he / she sends a start request signal to the VCC through the vehicle start switch. After receiving the request, the VCC collects the water level sensor and humidity sensor signals again for secondary judgment. When it determines that the vehicle has left the dangerous working condition, it transmits the control command to the EMS to start the engine and open the intake system.

[0051] After receiving the command, the EMS first sends an opening command to the electronically controlled waterproof valve 6, controlling the motor 61 to drive the rotating shaft 6425 to rotate in the opposite direction, causing the flap 6424 to rotate synchronously, and the angle sensor provides real-time feedback of angle data; when the feedback angle reaches 90° (the flap 6424 is fully open and the air intake passage is unobstructed), the EMS confirms that the air intake system has the conditions for air intake, and then sends a start command to the engine, controlling the fuel supply system to resume fuel supply, the ignition system to start ignition, the engine to start normally, and the air intake system to return to the normal working state of supplying clean air to the engine.

[0052] This embodiment adopts a hierarchical control architecture of VCC decision-making and EMS execution. VCC is responsible for global operating condition judgment (whether the engine and intake system need to be shut down), and EMS is used for precise control at the execution end (driving the waterproof valve, starting and stopping the engine), so as to achieve precise control of the intake system without affecting the intake efficiency of the engine under normal operating conditions.

[0053] This embodiment uses the detection signal from a water level sensor as the trigger source, enabling real-time detection of water depth and transmission of signals to the VCC, achieving precise control for waterproof protection. Simultaneously, the combination of a waterproof valve closing the intake pipe and a one-way waterproof diaphragm 35 sealing mechanism creates a fully enclosed intake system, blocking water from entering the engine and reducing the risk of engine stalling due to water ingress and damage to the cylinder block. This embodiment can also incorporate signals from other sensors to further ensure control accuracy.

[0054] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. 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 air intake system with a waterproof valve, characterized in that, It includes an intake pipe assembly, an air filter assembly, and an air bleed pipe assembly connected in sequence, wherein the air bleed pipe assembly is equipped with an electrically controlled waterproof valve; The electrically controlled waterproof valve includes a control motor and a valve plate assembly rotatably connected to the control motor. The valve plate assembly includes an integrated flap, and a valve body sealing ring is provided on the outer side of the integrated flap. The valve body sealing ring is provided with a toothed structure and a raised structure in sequence on its periphery. When the valve plate assembly is in the closed position, the raised structure is used to form a seal with the wall of the air vent assembly, and the toothed structure is used to form a seal with the inner circular surface of the air vent assembly.

2. The air intake system with a waterproof valve according to claim 1, characterized in that, The valve body sealing ring and the valve plate assembly have a concave-convex structure for fitting.

3. An air intake system with a waterproof valve according to claim 1 or 2, characterized in that, The valve plate assembly is provided with a limiting protrusion, and the sealing protrusion of the valve body sealing ring fits against the limiting protrusion.

4. An air intake system with a waterproof valve according to claim 1, characterized in that, A protective mesh frame is installed at the end of the air intake pipe assembly away from the air filter assembly.

5. An air intake system with a waterproof valve according to claim 1 or 4, characterized in that, The air filter assembly includes an upper housing, a lower housing, and a filter element installed between the upper housing and the lower housing; The lower housing is fitted with a one-way waterproof membrane.

6. An air intake system with a waterproof valve according to claim 5, characterized in that, The filter element has a PU layer on the outside, and the PU layer forms a sealed fit with the upper housing.

7. An air intake system with a waterproof valve according to claim 1, characterized in that, The intake pipe assembly and the bleed pipe assembly are respectively fixed to the air filter assembly by clamps, and an air filter sealing ring is installed at the clamp.

8. A vehicle, characterized in that, Install an intake system with a waterproof valve as described in any one of claims 1-7, the intake system being connected to the engine.

9. A vehicle according to claim 8, characterized in that, The control motor is connected to the vehicle control unit.

10. A vehicle intake control method, characterized in that, The vehicle of claim 9 comprises: The water level sensor detects water depth data and sends it to the vehicle control unit; The vehicle control unit sends water depth data to the control motor, which drives the valve plate assembly of the electronically controlled waterproof valve to rotate to the closed position; at the same time, the engine control unit controls the engine to shut down. After the water in the bleed air tube assembly is drained, the control motor drives the valve plate assembly to rotate in the opposite direction, opening the bleed air tube assembly.

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