Air inlet system, control method of air inlet system, controller and vehicle

Abstract

The invention relates to the technical field of air inlet systems, in particular to an air inlet system, a control method of the air inlet system, a controller and a vehicle, and aims at improving the NVH performance of the air inlet system. The air inlet system part comprises a silencer, a movable partition plate is arranged in the silencer, and the inner space of the silencer is divided into resonant cavities by the movable partition plate; and the adjusting motor is in driving connection with the movable partition plate and is used for driving the movable partition plate to move according to the operation condition of the vehicle so as to change the volume of the resonant cavity.

Description

Technical Field

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

[0002] In a vehicle's powertrain, the intake system plays a crucial role in guiding air into the power unit and suppressing airflow noise. To reduce the pulsating noise generated during the intake process, a muffler is typically installed in the intake path, using a muffler structure to attenuate noise at specific frequencies.

[0003] However, in existing intake systems, the structures responsible for attenuating intake noise are usually fixed. Because vehicles operate under various complex conditions, the intake frequency characteristics and noise energy distribution differ significantly under different conditions. Fixed silencing structures, during the design phase, can only be a compromise based on multiple anticipated operating conditions, attempting to accommodate noise suppression requirements at different speeds and loads. This often results in the intake system's NVH (noise, vibration, and harshness) performance failing to reach its optimal state under specific operating conditions. Summary of the Invention

[0004] This application provides an intake system, an intake system control method, a controller, and a vehicle, aiming to improve the NVH performance of the intake system.

[0005] An intake system, comprising: A muffler, wherein a movable partition is provided inside the muffler, and the movable partition divides the internal space of the muffler to form a resonant cavity; An adjustment motor is driven and connected to the movable partition, and is used to drive the movable partition to move according to the vehicle's operating conditions, so as to change the volume of the resonant cavity.

[0006] An intake system is provided that dynamically adjusts the volume of the resonant cavity by incorporating a movable baffle driven by an adjustable motor inside the muffler. This mechanism allows the intake system to move beyond simply focusing on static acoustic performance. Because the volume of the resonant cavity can be precisely matched to the vehicle's real-time operating conditions, it overcomes the technical limitation of traditional fixed mufflers, which can only consider overall NVH performance and cannot achieve optimal performance under all conditions. This ensures that the intake tailpipe noise is optimally controlled under all operating conditions, significantly improving the vehicle's intake NVH performance and enhancing driving comfort and market competitiveness.

[0007] In one implementation, the muffler has a guide rail inside for defining the moving path of the movable partition, and the movable partition slides along the guide rail driven by the adjusting motor.

[0008] By introducing a guide rail structure within the muffler, robust mechanical support and precise path guidance are provided for the movable baffle, offsetting the lateral forces exerted on the baffle by intake pulsation and eliminating mechanical shaking during baffle movement. This significantly improves the physical accuracy and response stability of the resonant cavity volume adjustment, ensuring precise matching of the silencing frequency. Simultaneously, the stable sliding mechanism reduces wear between moving parts, extends the service life of the adjustment mechanism, and further enhances the sustainability of the intake system's NVH performance under all operating conditions.

[0009] In one implementation, the guide rail is provided with a plurality of working condition position holes, which are used to limit the movement position of the movable partition under different operating conditions of the vehicle.

[0010] By setting multiple predefined working condition position holes on the guide rail, continuous volume adjustment is transformed into discrete, acoustically verified, and precise position docking. On the one hand, the use of physical hole positions for limitation greatly reduces the error of the adjustment motor during long-path movement, ensuring that the muffler can instantly reach the preset optimal silencing position under different working conditions. On the other hand, by solidifying the acoustic optimal points for each typical working condition, the NVH performance adjustment of the intake system has extremely high reliability and repeatability, thereby effectively improving the NVH performance of the vehicle's intake system.

[0011] In one implementation, the air intake system further includes a water-air separator and a water storage unit; The water storage section is provided with multiple water leakage holes, and the water storage section is connected to the interior of the silencer through the multiple water leakage holes; The water-air separator is installed at the inlet of the muffler, and the water storage unit is installed on the muffler body to collect the water separated by the water-air separator.

[0012] By integrating a water-air separator 1 into the muffler inlet and configuring a water storage unit with a drain hole, the intake system achieves controlled collection of moisture without affecting intake efficiency. On the one hand, it centrally collects moisture from the intake air; on the other hand, it turns waste into treasure, providing additional water supply for the vehicle, achieving efficient recycling of water resources, and improving the overall environmental performance and resource management capabilities of the vehicle.

[0013] In one implementation, the water storage unit has a fluid channel inside for guiding water flow, one end of the fluid channel is connected to the drain hole, and the other end is connected to the water storage chamber of the water storage unit.

[0014] By incorporating a dedicated fluid channel within the water storage compartment, precise flow control of the recycled water is achieved. A physical guidance mechanism reduces the random distribution of liquid water within the tank, establishing an ordered path from the inlet to the outlet valve. This eliminates the possibility of water accumulation in dead zones at the corners of the tank and ensures a stable flow supply to all drainage and recycling valves when open, significantly improving the real-time efficiency and reliability of water recycling and supporting the efficient operation of the entire vehicle's water circulation system.

[0015] In one implementation, the bottom of the water storage unit is provided with an external recycling drain valve, and the side of the water storage unit is provided with a vehicle water tank interface valve and an air humidifier interface valve. The external recycling drain valve, the vehicle water tank interface valve, and the air humidifier interface valve are respectively connected to the regulating motor.

[0016] The external circulation drain valve, the vehicle water tank interface valve, and the air humidifier interface valve are all fixedly connected to the same regulating motor, achieving a high degree of centralization. Combined with the regulating motor's function of adjusting the resonant cavity volume, the multi-functional composite characteristics of the intake system are further enhanced. It can not only optimize NVH performance in real time according to operating conditions, but also simultaneously complete the intelligent recovery and distribution of moisture. Through the multi-dimensional empowerment of a single motor, a balance between performance, cost, and environmental protection is achieved.

[0017] A control method for an intake system, applicable to any of the preceding intake systems, the method comprising: Identify the current operating condition of the vehicle; Based on the operating conditions, determine the target position of the movable partition; The adjustment motor is controlled to drive the movable partition to move to the target position, thereby adjusting the volume of the resonant cavity.

[0018] This control method achieves a leap from passive noise reduction to active adaptive adjustment of the intake system. It establishes a closed-loop mapping logic of operating condition, frequency, volume, and position, effectively solving the problem that existing fixed intake structures cannot simultaneously achieve NVH performance across all operating conditions. This ensures that the intake system automatically adjusts to the optimal acoustic response at every stage of vehicle operation, from idle to high-speed driving, significantly improving vehicle quietness and driving quality.

[0019] In one implementation, the operating conditions include at least one of idling, acceleration, deceleration, and constant speed driving.

[0020] In this embodiment, by refining the operating conditions into idling, acceleration, deceleration, and constant speed conditions at different speed ranges, a control dimension covering the entire lifecycle of the vehicle's driving characteristics is established. It is worth noting that this embodiment utilizes a multi-discrete-point control strategy to replace the single-frequency passive silencing mode, enabling the acoustic package design to be deeply coupled with the complex vehicle dynamic response characteristics. Targeted elimination of specific noise main frequency bands under different operating conditions is possible, ensuring that exhaust tailpipe noise reaches the target value regardless of whether starting, overtaking, or high-speed cruising, thus eliminating noise resonance phenomena under specific operating conditions.

[0021] In one implementation, determining the target position of the movable partition includes: Based on multiple pre-calibrated location identifiers, the location identifier corresponding to the current operating condition is matched, and the location of the movable partition corresponding to the matched location identifier is determined as the target location; The multiple location identifiers are obtained in advance by: testing the tailpipe noise frequency distribution of the vehicle under different operating conditions to analyze the frequency range where the exhaust noise is greater than the preset noise; determining the position of the movable baffle of the muffler under each operating condition based on the frequency range, and recording the position of the movable baffle of the muffler under each operating condition using different location identifiers.

[0022] In this embodiment, by matching operating conditions based on pre-calibrated position identifiers, a deterministic mapping from real-time driving intention to optimal acoustic response is established. This transforms the complex dynamic acoustic optimization problem into an efficient lookup and positioning task, eliminating computational lag and position drift of the actuator during real-time adjustment. This ensures that the vehicle's intake noise reduction performance is always within the calibrated optimal range across the entire speed range and in all scenarios. It solves the problem that traditional fixed intake systems cannot take into account noise at different frequencies, significantly improving the NVH performance of the vehicle's intake system, thereby enhancing the vehicle's market competitiveness and the quietness of the driving experience.

[0023] In one implementation, the method further includes: The load parameters of the vehicle are obtained, and the rotation speed of the water-air separator is adjusted based on the load parameters.

[0024] This adaptive adjustment mechanism improves the vehicle's operational reliability under various extreme climate and load conditions, and, together with the water storage unit 2, enables the efficient recycling of water resources.

[0025] In one implementation, adjusting the rotational speed of the water-air separator includes: When the load parameter is increased, the rotation speed is increased; When the load parameter is reduced, the rotation speed is decreased.

[0026] By establishing a positive correlation adaptive adjustment logic between load parameters and rotation speed, the precise coupling between moisture separation capability and engine real-time demand is achieved. Dynamic speed control replaces the traditional fixed speed operation mode, enabling the system to adjust the power intensity in real time according to the risk of moisture content in the intake airflow.

[0027] In one implementation, the method further includes: According to the valve control command, the regulating motor is controlled to open / close the external circulation drain valve, or open / close the vehicle water tank interface valve, or open / close the air humidifier interface valve.

[0028] This control logic establishes a closed-loop link from ambient moisture capture to in-vehicle resource allocation. The purpose of this control method is to transform condensate, which would otherwise be a burden on the intake system, into a dispatchable vehicle resource, and to complete complex valve switching tasks using a single power source. By intelligently controlling the flow of water to different circulation loops, it achieves both external water recycling and internal vehicle replenishment, thus achieving the technical goal of full water resource recovery and utilization. Since the resonant cavity volume adjustment, drain valve adjustment, and the adjustment of multiple interface valves all share the same regulating motor 7, the need for a separate actuator for each valve is avoided. This significantly improves the system's structural compactness.

[0029] A controller includes a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor, when executing the computer program, implements the control method of the intake system described in any of the preceding claims.

[0030] A vehicle comprising an intake system and a controller as described in any of the preceding claims. Attached Figure Description

[0031] Figure 1 This is a structural schematic diagram of an air intake system provided by existing technology; Figure 2 This is a schematic plan view of a cross-section of an intake system provided in one embodiment of this application; Figure 3 This is a schematic flowchart of a control method for an intake system provided in an embodiment of this application; Figure 4 This is a comparative diagram of the transmission loss of the intake system of this application under different operating conditions of the vehicle; Figure 5 This is another schematic flowchart of a control method for an intake system provided in an embodiment of this application; Figure 6 This is a schematic diagram of a controller provided in an embodiment of this application.

[0032] Explanation of reference numerals in the attached figures: 1. Water-air separation device; 2. Water storage section; 3. External circulation drain valve; 4. Vehicle water tank interface valve; 5. Air humidifier interface valve; 6. Leakage hole; 7. Adjustment motor; 8. Working condition position hole; 9. Guide rail; 10. Muffler; 11. Movable partition. Detailed Implementation

[0033] To make the technical problems, technical solutions, and beneficial effects solved by this application clearer, the following detailed description is provided in conjunction with embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0034] Currently, the structure for controlling the noise of a vehicle's intake system cannot be dynamically adjusted. When designing, it can only take into account the comprehensive NVH performance under various operating conditions, and cannot guarantee that the vehicle is in the optimal state under every operating condition. Therefore, it is particularly important to design a dynamically adjustable intake system to improve the NVH performance of a vehicle.

[0035] like Figure 1 As shown, Figure 1 The intake system used in a certain vehicle has a fixed structure, which cannot guarantee optimal NVH performance under every operating condition. A comprehensive approach is needed, requiring a system that accommodates multiple conditions, but this results in suboptimal NVH performance across all operating scenarios. Existing intake systems cannot adjust in real-time according to vehicle operating conditions, failing to achieve optimal NVH performance for every situation. Therefore, there is a pressing need for an intake system capable of adjusting the resonant cavity volume to address noise attenuation requirements at different frequencies. This would ensure optimal noise control in the intake manifold under all operating conditions, significantly improving the vehicle's intake NVH performance.

[0036] This application embodiment mainly provides an intake system, including: A muffler 10 is provided inside the muffler 10, and the movable partition 11 divides the internal space of the muffler 10 to form a resonant cavity. Adjustment motor 7 is drivenly connected to the movable partition 11 and is used to drive the movable partition 11 to move according to the vehicle's operating conditions, so as to change the volume of the resonant cavity.

[0037] Because the intake system achieves dynamic adjustment of the resonant cavity volume by setting a movable baffle 11 inside the muffler 10 that can be driven by the adjustable motor 7, this mechanism allows the intake system to no longer be limited to a single static acoustic performance. The volume of the resonant cavity can be precisely matched according to the real-time operating conditions of the vehicle, solving the technical pain point that the traditional fixed muffler 10 can only take into account the overall NVH performance and cannot achieve the best performance under all operating conditions, thus solving the intake NVH performance problem of the traditional solution.

[0038] Example 1 This application provides an intake system designed to improve the intake noise performance of a vehicle and enhance its overall NVH performance.

[0039] In this embodiment, an intake system is provided, which can be combined with Figure 2 Understood, the intake system includes: A muffler 10 is provided inside the muffler 10, and the movable partition 11 divides the internal space of the muffler 10 to form a resonant cavity. Adjustment motor 7 is drivenly connected to the movable partition 11 and is used to drive the movable partition 11 to move according to the vehicle's operating conditions, so as to change the volume of the resonant cavity.

[0040] It should be noted that the above-mentioned air intake system can be applied to various types of motor vehicles, and can adapt to complex driving environments by dynamically adjusting the acoustic structure.

[0041] In this application, the muffler 10 refers to an acoustic attenuation device installed on the vehicle's air intake path, and its main body is typically a shell structure made of metal or high-temperature resistant plastic. In this embodiment, a movable baffle 11 is provided inside the shell of the muffler 10. This movable baffle 11 is a physical isolation component capable of displacement under stress. The movable baffle 11 and the inner wall surface of the muffler 10 typically maintain a dynamic seal or micro-gap fit, thereby dividing the complete internal space of the muffler 10 into at least one chamber with a specific function, namely a resonant cavity.

[0042] A resonant cavity is a noise-attenuating structure designed based on the principle of acoustic resonance. When sound waves in the intake airflow enter the resonant cavity, the air column inside the cavity will undergo forced vibration. Through the conversion of acoustic energy to mechanical energy or the interference of sound waves, noise at a specific center frequency is attenuated. The volume V of the resonant cavity is the core physical variable that determines its noise-attenuating frequency.

[0043] An adjustment motor 7, serving as a power source, is mounted on or near the muffler 10 body. For example, a stepper motor, servo motor, or DC geared motor can be used. The output shaft of the adjustment motor 7 is driven by the movable partition 11 via a transmission mechanism (such as a rack and pinion, lead screw, or linkage mechanism). The adjustment motor 7 rotates by receiving control commands from a vehicle controller (such as an engine control unit ECU), converting electrical energy into mechanical energy, thereby driving the movable partition 11 to move in a predetermined direction within the muffler 10.

[0044] Vehicle operating conditions refer to a set of real-time parameters describing the vehicle's driving state. For example, these may include idling, acceleration, deceleration, and constant-speed driving conditions. Under different operating conditions, the intake pulsation frequency, airflow velocity, and intake volume generated by the engine are different, resulting in significant differences in the noise frequency characteristics (such as the dominant noise frequency). For instance, when the vehicle switches from idling to acceleration, the dominant frequency of the intake noise shifts significantly. At this time, the regulating motor 7, based on the operating condition signal identified by the controller, drives the movable partition 11 to a preset position, thereby changing the physical volume of the resonant cavity. By increasing or decreasing the volume, the muffler 10's noise reduction characteristic curve can be changed in real time, ensuring its noise reduction peak accurately aligns with the noise peak segment under the current operating condition.

[0045] As can be seen, this embodiment provides an intake system that achieves dynamic adjustment of the resonant cavity volume by setting a movable baffle 11 driven by an adjustable motor 7 inside the muffler 10. This mechanism allows the intake system to move beyond simply focusing on static acoustic performance. Because the resonant cavity volume can be precisely matched according to the vehicle's real-time operating conditions, it solves the technical pain point that traditional fixed mufflers 10 can only consider overall NVH performance and cannot achieve optimal performance under all operating conditions. By adjusting the resonant cavity volume in real time to meet the noise attenuation requirements of different frequencies, the intake tailpipe noise of the vehicle is ensured to reach optimal control under various operating conditions, thereby significantly improving the vehicle's intake NVH performance and enhancing driving comfort and market competitiveness.

[0046] In one embodiment of this application, the structural design of the intake system further focuses on the stability and accuracy of the movement of the movable baffle 11. The muffler 10 is provided with a guide rail 9 for defining the movement path of the movable baffle 11, and the movable baffle 11 slides along the guide rail 9 driven by the adjusting motor 7.

[0047] Specifically, the guide rail 9 refers to a mechanical guiding component with a fixed geometric trajectory installed inside the muffler 10 housing. Its physical form can be a slide integrally formed into the inner wall of the muffler 10, or a metal guide strip additionally fastened to the inner cavity. The main function of the guide rail 9 is to provide mechanical constraints on the displacement of the movable baffle 11, limiting its movement to a preset straight or curved path, thereby preventing the movable baffle 11 from deflecting, tilting, or jamming under conditions of airflow pressure fluctuations or severe vehicle vibration.

[0048] In actual operation, the torque output by the regulating motor 7 is converted into a thrust or pull force acting on the movable partition 11 via a transmission mechanism (such as a lead screw, cable, or rack). Due to the presence of the guide rail 9, the movable partition 11 does not undergo disordered displacement within the muffler 10 cavity after being subjected to force, but rather moves precisely along the physical axis of the guide rail 9 in a sliding manner. This sliding fit typically employs materials with a low coefficient of friction or a lubricating coating to reduce resistance during the adjustment process and lower the load on the motor.

[0049] For example, as a case study, when the vehicle switches from idling to rapid acceleration, the controller issues a command to activate the regulating motor 7. The motor drives the partition 11 to slide rapidly along the guide rail 9 to a predetermined target position to change the volume of the resonant cavity. Because the guide rail 9 defines a unique path of movement, the partition 11 can reach the target point with extremely high positional repeatability, ensuring the accuracy of the change in the resonant cavity volume.

[0050] As can be seen, in this embodiment, by introducing a guide rail 9 structure into the muffler 10, a solid mechanical support and precise path guidance are provided for the movable baffle 11, which counteracts the lateral force generated by the intake pulsation on the baffle 11, eliminates the mechanical shaking during the movement of the baffle 11, significantly improves the physical accuracy and response stability of the resonant cavity volume adjustment, and ensures the precise matching of the silencing frequency; at the same time, the stable sliding mechanism reduces the wear between moving parts, extends the service life of the adjustment mechanism, and further enhances the sustainability of the intake system's NVH performance under all operating conditions.

[0051] In one embodiment, the structure of the intake system is further optimized to improve the accuracy of position adjustment. Specifically, the guide rail 9 is provided with a plurality of operating position holes 8, which are used to limit the movement position of the movable partition 11 under different vehicle operating conditions.

[0052] The working condition position hole 8 refers to a pre-set positioning hole or feature structure at a specific physical coordinate point on the guide rail 9. The vehicle operating condition refers to a set of parameters describing the real-time driving state of the vehicle. For example, as an example, the operating conditions in this embodiment include idling condition, acceleration condition, deceleration condition, and constant speed driving condition (e.g., conditions with vehicle speeds of 30km / h, 60km / h, or 120km / h).

[0053] The placement of these operating condition position holes 8 is predetermined based on prior acoustic calibration tests. The specific process is as follows: During the R&D phase, the target noise values ​​for the intake system tailpipe under various operating conditions are first determined based on benchmark vehicle data. Subsequently, the actual tailpipe noise of the intake system under different operating conditions is tested, and the frequency range with higher exhaust noise energy (above the preset noise level) is analyzed. Based on the acoustic model, the resonant cavity volume of the muffler 10, capable of canceling noise at this specific frequency, is designed, and the physical position of the movable baffle 11 within this volume is determined accordingly. Finally, operating condition position holes 8 are machined at the corresponding points on the guide rail 9, and their positions are marked according to the operating conditions, for example, as idle operating condition position, acceleration operating condition position, deceleration operating condition position, and constant speed operating condition position, etc.

[0054] In actual operation, when the vehicle enters a specific driving state, the controller identifies the current operating condition through the CAN bus and sends a command to the regulating motor 7. The regulating motor 7 drives the movable partition 11 to move along the guide rail 9 until the positioning pin or detection sensor on the partition 11 is physically locked with the corresponding operating condition position hole 8.

[0055] As can be seen, in this embodiment, by setting multiple predefined working condition position holes 8 on the guide rail 9, continuous volume adjustment is transformed into discrete, acoustically verified, and precise position docking. On the one hand, by using physical hole positions for limitation, the cumulative error of the adjustment motor 7 during long-path movement is greatly reduced, ensuring that the muffler 10 can instantly reach the preset optimal noise reduction position under different working conditions. On the other hand, by solidifying the acoustic optimal points of each typical working condition, the NVH performance adjustment of the intake system has extremely high reliability and repeatability, thereby effectively improving the NVH performance of the vehicle's intake system and enhancing the vehicle's market competitiveness.

[0056] In one embodiment, the air intake system also integrates a moisture recovery and utilization function, aiming to solve the problems of water waste and potential safety hazards caused by the direct discharge of moisture in the intake airflow with the air. Specifically, the air intake system also includes a water-air separator 1 and a water storage unit 2. The water storage unit 2 is provided with multiple drainage holes 6, and the water storage unit 2 is connected to the interior of the muffler 10 through the multiple drainage holes 6. The water-air separator 1 is installed at the inlet of the muffler 10, and the water storage unit 2 is installed on the body of the muffler 10 for collecting the moisture separated by the water-air separator 1.

[0057] The water-air separation device 1 refers to a device that uses mechanical or physical means to separate liquid water droplets from the gas phase in the intake airflow. In this embodiment, the device is arranged at the air intake front end of the muffler 10 to capture moisture before the airflow enters the acoustic cavity of the muffler 10. The water storage section 2 is a box structure installed outside the muffler 10 housing or integrated with it, usually arranged near the inlet of the muffler 10 to shorten the flow path. The drain hole 6 is a tiny channel connecting the inner cavity of the muffler 10 and the cavity of the water storage section 2. For example, as an example, the drain hole 6 is a circular hole structure with a diameter of 8-10 mm, and the number is preferably 3-5, which is intended to ensure that moisture can be discharged efficiently without affecting the acoustic sealing of the muffler 10.

[0058] In actual operation, when a vehicle operates in a humid environment or under high load conditions, a large amount of moisture enters the intake system with the air. After the airflow passes through the water-air separator 1 at the inlet, the precipitated liquid moisture adheres to the inner wall of the muffler 10 or a dedicated drainage channel, and then flows through multiple drainage holes 6 under gravity or pressure difference to the water storage section 2 for centralized storage. Furthermore, for example, the intensity of moisture separation can be adjusted in real time according to vehicle load parameters: automatically increasing the separation capacity when the load is high; and decreasing it accordingly when the load is low, to achieve a balance between energy consumption and recovery efficiency.

[0059] As can be seen, in this embodiment, by integrating a water-air separator 1 at the inlet of the muffler 10 and configuring a water storage unit 2 with drainage holes 6, the intake system achieves controlled collection of moisture without affecting intake efficiency. The principle lies in establishing a low-resistance drainage path between the inside of the muffler 10 and the water storage unit 2 using physical barriers and guide holes. On the one hand, by centrally collecting intake moisture, it effectively avoids environmental pollution or safety hazards such as road icing in winter caused by the indiscriminate discharge of condensate; on the other hand, it turns waste into treasure, providing additional water supply for the vehicle, achieving efficient recycling of water resources, and improving the overall environmental performance and resource management capabilities of the vehicle.

[0060] In one embodiment, the water-air separator 1 in the air intake system employs a specific mechanical structure to optimize separation efficiency. Specifically, the water-air separator 1 is a fan structure used to separate moisture in the intake air by rotation.

[0061] The fan structure refers to a dynamic component with multiple rotating blades, which is installed at the inlet of the muffler 10. The technical principle of this structure is centrifugal separation: when the intake airflow containing condensed water droplets or moisture flows over the high-speed rotating blades, the larger water droplets are thrown towards the inner wall of the muffler 10 under the action of centrifugal force, while the lighter gas continues to enter the interior of the muffler 10 along the axial direction or a predetermined flow channel.

[0062] In the specific processing, the fan structure can be driven by a dedicated drive motor or by the kinetic energy of the intake airflow itself. As an example, the rotation speed of the fan structure can be adjusted according to the vehicle's real-time load parameters (such as intake airflow and vacuum level): when the vehicle is under high load, the intake air volume increases and the risk of carrying moisture rises; by increasing the rotation speed of the fan structure, the centrifugal separation effect is enhanced. Under low load conditions, the rotation speed is correspondingly reduced to lower system energy consumption. The separated liquid water then flows through the aforementioned drain hole 6 to the water storage section 2.

[0063] In this embodiment, the water-air separation device 1 is designed as a fan structure. Utilizing the centrifugal effect generated by the fan's rotation, efficient decoupling of the gas-liquid two-phase flow is achieved. This structure provides a dynamic physical barrier. Compared to traditional static filters, the fan structure is less prone to clogging and can dynamically adjust the separation intensity according to the airflow state, significantly improving the intake air moisture capture rate. This ensures that the airflow entering the muffler 10 and the resonant cavity has a high degree of dryness, extending the service life of the muffler structure and effectively preventing moisture from entering the engine combustion chamber, thus improving the overall vehicle's operational reliability and water recovery efficiency.

[0064] In one embodiment, the air intake system further optimizes the internal management of water collection. The water storage unit 2 is provided with a fluid channel (not shown in the figure) for guiding water flow, one end of which is connected to the drain hole 6, and the other end is connected to the water storage chamber of the water storage unit 2.

[0065] Specifically, a fluid channel refers to a pre-designed physical flow path within the tank structure of the water storage section 2. For example, this fluid channel can manifest as an inclined surface at the bottom of the water tank, flow guide ribs installed inside the tank, baffles, or dedicated drainage pipes. The fluid channel, through geometric changes or physical barriers, guides the water entering the storage section 2 to overcome the disorderly swaying caused by gravitational ripples or vehicle vibrations, achieving directional flow.

[0066] In actual processing, when moisture in the intake airflow is separated by the water-air separator 1 (such as a fan structure) and enters the water storage section 2 through multiple drain holes 6 on the inner wall of the muffler 10, these dispersed water droplets come into contact with the fluid channel. Due to the guiding effect of the fluid channel, the moisture quickly gathers and flows to a predetermined area in the storage section 2, such as the external recycling drain valve 3 at the bottom, or the low-level collection area where the vehicle water tank interface valve 4 and the air humidifier interface valve 5 are located on the side. As an example, in driving scenarios where the vehicle tilts or bumps, the fluid channel can use its compartment or guide structure to prevent the collected water from violently shaking, ensuring that each interface valve is always in contact with the liquid surface.

[0067] In this embodiment, a dedicated fluid channel is provided inside the water storage section 2 to achieve precise flow control of the recycled water. A physical guidance mechanism reduces the random distribution of liquid water within the tank, establishing an orderly path from the inlet to the outlet valve. On one hand, this eliminates the possibility of water accumulation in dead zones at the corners of the tank, effectively preventing the risk of localized corrosion or winter freezing and expansion caused by long-term water accumulation. On the other hand, it ensures a stable flow supply to each drainage and recycling valve when open, greatly improving the real-time efficiency and reliability of water recycling and supporting the efficient operation of the entire vehicle's water circulation system.

[0068] In one embodiment of this application, the air intake system achieves directional recovery and controllable management of water through a specific drainage component. Specifically, an external recycling drain valve 3 is provided at the bottom of the water storage section 2.

[0069] The external circulation drain valve 3 refers to a fluid control component installed at the low position of the water storage container, used to regulate the on / off state between the liquid storage space and the external circulation loop. In this embodiment, the drain valve 3 is arranged at the bottom of the water storage section 2. This position makes full use of the gravity characteristics of the liquid, ensuring that the water in the water storage tank can be discharged or migrated to the maximum extent through the lowest point, effectively avoiding the formation of dead zones inside the tank.

[0070] In actual operation, the external recycling drain valve 3 is physically connected to the regulating motor 7. When the controller detects that the water level in the water storage unit 2 has reached a preset threshold, or receives an external valve control command, the regulating motor 7 drives the transmission mechanism to switch the drain valve 3 from the closed state to the open state. At this time, the purified water stored in the tank flows out through the valve under gravity and enters the external collection container or recycling system. As an example, in vehicle maintenance or specific water replenishment scenarios, the drain valve can be opened manually or automatically to release the collected purified water.

[0071] In this embodiment, an external recycling drain valve 3 is installed at the bottom of the water storage section 2, establishing a physical interface between the air intake system and the external resource recycling system. The low-level drainage principle enables active management of the liquid level and provides a controllable water output channel. On the one hand, the controllable discharge mechanism solves the environmental pollution caused by water leakage from the air intake system and the safety hazard of chassis icing in winter; on the other hand, the drain valve provides the prerequisite for external water recycling, greatly enhancing the recycling value of by-product resources generated during vehicle operation, which aligns with the development concept of energy conservation and environmental protection.

[0072] In this embodiment, the intake system achieves multi-functional coordinated control through a highly integrated power distribution scheme. Specifically, the regulating motor 7 is connected to the external recycling drain valve 3 via a transmission mechanism, so that the regulating motor 7 can share the control of the volume adjustment of the resonant cavity and the opening and closing of the external recycling drain valve 3.

[0073] In this structure, the regulating motor 7, as the sole power source within the system, is responsible not only for driving the movable partition 11 to move within the muffler 10 to adjust the resonant cavity volume, but also for controlling the on / off state of the water recovery path. The transmission mechanism refers to the component that converts the kinetic energy of the motor into specific mechanical actions; as an example, it may include gear sets, cam mechanisms, linkages, or specific clutch devices.

[0074] In actual operation, the regulating motor 7 operates within different stroke ranges or under specific rotational logic according to control commands. As an example, when the motor is within the first preset stroke range, it mainly drives the movable partition 11 to slide smoothly on the guide rail 9 through the transmission mechanism, thereby accurately matching the acoustic volume required for the current working condition (such as idling, acceleration, or constant speed). When a water recovery requirement is detected (such as the water level in the water storage section 2 being too high), the regulating motor 7 can run to a specific second stroke position (such as the trigger position at the end of the stroke) or switch the rotation direction, driving the valve core of the external circulation drain valve 3 to generate displacement through the transmission mechanism, thereby opening or closing the valve and thus enabling the controlled recovery and utilization of water.

[0075] In this embodiment, by integrating the resonant cavity volume adjustment and drain valve adjustment functions onto the same regulating motor 7, a deep coupling between the acoustic adjustment system and the moisture management system is achieved at the physical level. A single power system accomplishes a complex task that would otherwise require multiple actuators, significantly simplifying the spatial layout of the intake system, substantially improving system integration, and reducing overall weight. While ensuring functional completeness, it effectively reduces hardware procurement costs and electrical wiring complexity, making the system structure more compact and efficient.

[0076] In one embodiment, the air intake system achieves closed-loop utilization of water through a diversified interface design. Specifically, the side of the water storage unit 2 is provided with a vehicle water tank interface valve 4.

[0077] The vehicle radiator interface valve 4 refers to the fluid control terminal installed on the wall of the water storage section 2. As a physical interface, the vehicle radiator interface valve 4 guides the purified water collected by the intake system to the vehicle's cooling circulation system or other water storage facilities. The vehicle radiator interface valve 4 is located on the side of the water storage section 2. This spatial arrangement helps avoid potential sediment buildup at the bottom and facilitates a compact connection with other water pipes in the engine compartment.

[0078] In actual operation, the vehicle radiator interface valve 4 establishes a drive connection with the regulating motor 7. When the vehicle's control system detects that the coolant level in the vehicle radiator is too low, or that the water level in the intake system's water storage compartment 2 has reached a preset upper limit, the regulating motor 7 performs a specific opening action through the transmission mechanism. At this time, the water in the water storage compartment 2, assisted by pressure differential or water pump power, is transported to the vehicle radiator through the side-mounted radiator interface valve 4. As an example, during long-distance driving or in high-temperature environments, the engine experiences significant coolant loss. In such cases, the system can automatically replenish the cooling system with condensate generated during intake, achieving online water replenishment.

[0079] In this embodiment, by installing a vehicle radiator interface valve 4 on the side of the water storage section 2, the water management of the intake system and the vehicle cooling system are functionally coupled. The regulating motor 7 is used to automate the switching of water from waste collection to resource supply. By directly replenishing the intake condensate to the vehicle radiator, the burden of frequent manual coolant replenishment by the driver is effectively reduced, achieving full recovery and reuse of water resources. Because the water is transferred in a timely manner, the load weight of the intake system's water tank is reduced, indirectly contributing to improved fuel economy. Furthermore, by utilizing the existing regulating motor 7 to control the opening and closing of the interface valve, no additional actuators are needed, ensuring a lightweight system structure while improving the intelligence level of the vehicle's thermal management system.

[0080] In one embodiment, the air intake system further enhances the intelligent comfort of the vehicle by expanding the application scenarios of moisture. Specifically, an air humidifier interface valve 5 is provided on the side of the water storage unit 2.

[0081] The air humidifier interface valve 5 refers to the controlled fluid switch installed on the side wall of the water storage section 2, which serves as the physical output terminal and connects to the air humidification system in the vehicle cabin. This valve is located on the side of the water storage section 2 and is designed to utilize the pure liquid level in the middle of the tank to guide the recovered water to the air humidifier through a pipeline, thereby achieving closed-loop reuse of water resources.

[0082] In actual operation, the air humidifier interface valve 5 establishes a drive connection with the regulating motor 7 and is subject to unified scheduling by the vehicle controller. As an example, when the humidity sensor in the vehicle cabin detects that the environment is too dry, or when the user turns on the air conditioning humidification function, the controller sends a valve control command to the regulating motor 7. The regulating motor 7 drives the transmission mechanism to produce a specific stroke displacement, causing the air humidifier interface valve 5 to switch from a closed state to an open state, and the water in the water storage section 2 then flows into the atomizing device or evaporation unit of the humidification system. Furthermore, the opening of the air humidifier interface valve 5 can be decoupled from the volume adjustment logic of the resonant cavity, achieving independent control through the motor's movement within a specific non-acoustic adjustment range.

[0083] In this embodiment, by installing an air humidifier interface valve 5 on the side of the water storage section 2, the function of converting intake condensate into cabin environment improvement is realized. This feature establishes a direct conversion path from industrial byproducts to passenger comfort gains. Utilizing pure water produced by the intake system for humidification eliminates the need for manual water addition by the user, effectively improving cabin air dryness during long-distance driving and enhancing the driving experience. By using a shared regulating motor 7 to control the opening and closing of the humidifier interface valve, the need for a separate water tank and pump valve for the humidification system is avoided, significantly reducing the hardware cost and space occupation of the cabin accessory system. Furthermore, in conjunction with the vehicle water tank interface valve 4 and drain valve, a multi-level water circulation management system is constructed, achieving the technical goal of full water resource recovery and utilization.

[0084] It is worth noting that the muffler also includes a perforated tube, which is a tubular component with multiple silencing holes distributed on its wall, located inside the muffler. It serves as the main channel for the intake airflow, directly connecting the muffler's inlet and outlet, ensuring that fresh air can be smoothly delivered to the engine. The perforated tube's function is to establish an acoustic connection between the airflow channel and the external resonant cavity. When noise-carrying intake airflow passes through the perforated tube, sound waves pass through the silencing holes on the tube wall and enter the resonant cavity separated by the movable baffle 11. These silencing holes and the resonant cavity together form an acoustic filter, achieving precise capture and attenuation of noise at specific frequencies through sound energy dissipation and sound wave interference cancellation. The perforated tube and the movable baffle 11 maintain a close assembly and cooperative relationship. The movable baffle 11 is typically fitted around the outer periphery of the perforated tube or arranged parallel to the axis of the perforated tube. In the actual process, the adjusting motor 7 drives the movable partition 11 to slide along the axial direction of the perforated tube. This action actually changes the effective physical volume V of the resonant cavity wrapped around the perforated tube.

[0085] When the movable partition 11 moves to one side: the cavity space involved in acoustic resonance increases, which can better suppress lower frequency intake pulsation noise. When the movable partition 11 moves to the other side: the resonant cavity volume decreases, and the silencing frequency shifts to higher frequencies, thereby matching the noise characteristics of the vehicle under high speed or heavy load.

[0086] By incorporating a perforated tube within the muffler and cooperating with a dynamically adjustable baffle 11, precise control of the acoustic path is achieved. The perforated tube provides stable airflow guidance and serves as a window for sound wave exchange; while the baffle 11 offers the possibility of dynamic adjustment. While maintaining a low intake resistance (pressure drop), the perforated tube guides airflow noise into an adjustable-volume resonant cavity, allowing the muffler to precisely switch its silencing frequency band according to the vehicle's real-time operating conditions. This not only solves the problem of narrow silencing bandwidth in fixed mufflers but also ensures that no significant secondary regenerated noise is generated when airflow passes through the muffler, significantly improving the overall vehicle's intake NVH performance and driving quality.

[0087] It is worth noting that, in one embodiment, the muffler may not have a through-hole perforated pipe inside, and the intake airflow directly enters the main cavity defined by the inner wall of the muffler housing. In this case, the circumferential edge of the movable baffle 11 forms a dynamic sealing fit with the inner wall surface of the muffler housing 10, thereby dividing the inner cavity of the housing into a resonant cavity with independent acoustic function. Specifically, the cross-sectional shape of the movable baffle 11 is highly matched with the cross-sectional height of the inner cavity of the muffler housing. In order to maintain excellent acoustic sealing and reduce mechanical friction during sliding, the edge of the movable baffle 11 may be provided with an elastic seal or a self-lubricating coating. The elastic seal forms a flexible barrier between the movable baffle and the inner wall of the housing, ensuring that the sound wave energy can be effectively confined in the resonant cavity in front of the baffle, without sound energy leakage through the gap.

[0088] In actual operation, due to the lack of support from the central tube, the operational stability of the movable baffle 11 is mainly ensured by the guide rail 9 set on the inner wall of the housing. The movable baffle 11 is embedded in the guide rail by a slider or roller mechanism on its edge and is driven by the adjusting motor 7 to reciprocate along the guide rail axis. As an example, when the adjusting motor 7 drives the movable baffle 10 to move to adjust the volume of the resonant cavity, the multi-point constraint provided by the guide rail can counteract the non-uniform pressure generated by the intake airflow on the baffle, preventing the movable baffle 10 from deflecting or getting stuck during movement. By eliminating the perforated tube and adopting a structure in which the movable baffle 10 directly engages with the inner wall of the housing, a high degree of lightweighting and structural simplification of the intake muffler system is achieved. This allows for a larger volume adjustment range within the limited muffler volume.

[0089] Example 2 like Figure 2 As shown in the figure, this application provides an air intake system, which is an air intake system with water recycling function and adjustable resonant cavity, used to improve the vehicle's water recycling capability and the NVH performance of its air intake system.

[0090] The air intake system includes a water-air separator 1, a water storage unit 2, an external circulation drain valve 3, a vehicle water tank interface valve 4, an air humidifier interface valve 5, a water leakage hole 6, an adjustment motor 7, a working position hole 8, a guide rail 9, and a muffler 10.

[0091] The water-air separator 1, installed at the inlet of the muffler 10, is a fan-type structure that separates water through high-speed rotation. The water storage section 2 is a box-like structure with a fluid channel in the middle, installed on the muffler 10 body near the inlet. The water storage section 2 has multiple drainage holes 6, which are round holes with a diameter of 8-10 mm, numbering 3-5. An external circulation drain valve 3 is located at the bottom of the water storage section 2 and is connected to a regulating motor 7, controlling its opening and closing for controlled external water circulation. A vehicle water tank interface valve 4 is located on the side of the water storage section 2 and is connected to the regulating motor 7, controlling its opening and closing for controlled vehicle water tank circulation. The air humidifier interface valve 5 is located on the side of the water storage section 2. The air humidifier interface valve 5 is connected to the regulating motor 7, which controls the opening and closing of the air humidifier interface valve 5 to achieve controlled water recycling. The muffler 10 is equipped with the regulating motor 7 and guide rail 9. The regulating motor 7 drives the movable partition 11 of the muffler 10 to move on the guide rail 9, and adjusts it to the corresponding position of the working condition position hole 8 according to real-time operating conditions. This changes the volume of the intake system muffler resonant cavity, thereby altering the muffler 10's noise reduction performance and improving the NVH performance of the vehicle's intake system.

[0092] In this embodiment, when the vehicle is working, water will be discharged. If the discharge of water is not controlled, it will cause inconvenience to the use environment and waste of resources. A water-air separation device 1 and a water storage unit 2 are set up, and an adjusting motor 7 is used to control the opening and closing of the external circulation drainage valve 3, the vehicle water tank interface valve 4 and the air humidifier interface valve 5 to control the recovery and utilization of water. When a vehicle is operating, it experiences various operating conditions, each with different requirements for the noise reduction performance of the intake system. The structure of the muffler 10 in the intake system significantly impacts its noise reduction performance. However, the noise reduction structure within the intake system is fixed. To accommodate the diverse operating conditions of the vehicle, a comprehensive approach must be taken, requiring the design of an intake system that considers multiple conditions. This approach, however, results in suboptimal NVH performance for the vehicle under various operating conditions. Therefore, by arranging an adjustment motor 7 within the intake system to control the adjustment of the movable baffle 11 of the muffler 10, the volume of the muffler resonant cavity is altered. This adjustment is then connected to the vehicle controller for real-time adaptation to changes in different operating conditions. This solves the problem of the intake system's inability to adjust in real-time according to vehicle operating conditions, ensuring optimal NVH performance for the intake system under all operating conditions of the vehicle.

[0093] Example 3 This application also provides a control method for an intake system. This method is applicable to the intake system described in the foregoing embodiments and aims to achieve optimal matching of noise reduction performance under all operating conditions of the vehicle through intelligent dynamic adjustment logic.

[0094] In one embodiment, such as Figure 3 As shown, the control method of this intake system includes the following steps: S101. Identify the current operating conditions of the vehicle; Operating conditions refer to a set of parameters that describe the real-time driving status, engine load, and power output characteristics of a vehicle. For example, in this embodiment, operating conditions may specifically include at least one of idling conditions, acceleration conditions, deceleration conditions, and constant speed driving conditions (such as low speed 30km / h, medium speed 60km / h, and high speed 120km / h).

[0095] In actual operation, the vehicle's CAN bus connects to the vehicle controller (such as the vehicle control unit (VCU) or engine control unit (ECU)) to acquire and identify current operating condition signals in real time. For example, by monitoring the dynamic changes in signals such as throttle opening, engine speed, vehicle speed, and torque request, it can accurately determine whether the vehicle is in a stable constant-speed cruising state or a state of violent transient acceleration.

[0096] S102. Determine the target position of the movable partition 11 based on the operating conditions; The target position refers to the physical coordinates of the movable baffle 11 that enables the intake system to produce the best noise reduction effect under specific operating conditions.

[0097] It should be noted that, in order to determine this location, the system needs to perform data matching based on a pre-calibrated mapping relationship. Specifically, during the calibration phase of vehicle development, the frequency distribution of the intake system tailpipe noise under different operating conditions must first be tested to analyze and identify the frequency band with higher noise energy. Subsequently, based on the acoustic resonance principle, a muffler 10 structure capable of canceling noise at this frequency is designed, and the corresponding physical position of the movable baffle 11 is determined and recorded as a position identifier. For example, the coordinates corresponding to the idling condition are recorded as the idling condition position, and the coordinates corresponding to the high-speed constant speed condition are recorded as the constant speed driving condition position. During actual vehicle operation, the control algorithm retrieves and matches the corresponding target position identifier from the memory based on the identified current operating condition.

[0098] S103. Control the adjustment motor 7 to drive the movable partition 11 to move to the target position to adjust the volume of the resonant cavity.

[0099] After determining the target position, the vehicle controller sends an execution command to the guide rail 9 and the adjusting motor 7. The adjusting motor 7 responds to the command and drives the transmission mechanism to move, causing the movable partition 11 inside the muffler 10 to slide along the guide rail 9 until it reaches the target position defined by the working position hole 8.

[0100] During this process, the displacement of the movable baffle 11 changes the physical volume V of the resonant cavity inside the muffler 10. According to the acoustic resonance formula, the change in volume V directly causes a shift in the resonant frequency of the muffler 10. For example, as an example, when the vehicle enters acceleration mode, the intake frequency increases, and the motor drives the baffle to move to reduce the volume V, causing the peak noise reduction frequency of the muffler 10 to shift to a higher frequency, thereby accurately covering and eliminating the intake noise during acceleration.

[0101] As can be seen, in this embodiment, the control method achieves a leap from passive noise reduction to active adaptive adjustment of the intake system. It establishes a closed-loop mapping logic of operating condition, frequency, volume, and position, effectively solving the problem that existing fixed intake structures cannot simultaneously achieve NVH performance across all operating conditions. This ensures that the intake system automatically adjusts to the optimal acoustic response state at every stage of vehicle operation, from idle to high-speed driving, significantly improving vehicle quietness and driving quality.

[0102] In one embodiment, the intake system control method is finely adapted to various typical states that may occur when a vehicle is driving on actual roads, to ensure quietness in all scenarios. Specifically, the operating conditions include at least one of idling, acceleration, deceleration, and constant speed driving.

[0103] By establishing communication with vehicle controllers (such as vehicle controllers or engine controllers), the CAN bus can be used to obtain low-level data such as engine speed, throttle opening, vehicle speed, braking signals, and torque demand in real time.

[0104] Idle condition: This refers to the state where the vehicle is started and stationary, and the engine operates at the minimum stable speed required to maintain operation. At this time, the intake airflow speed is low, but the mechanical vibration and combustion pulsation of the engine will produce obvious low-frequency resonance noise.

[0105] Acceleration mode: This refers to the state where the driver presses the accelerator pedal, and the vehicle load and intake air volume increase rapidly. Under this condition, the pressure fluctuation of the intake system is violent, and the noise energy will shift rapidly across a wide frequency range as the engine speed increases.

[0106] Deceleration condition: refers to the state in which the vehicle coasts or brakes to reduce speed. At this time, the intake throttle valve is closed or has a very small opening, and specific back pressure noise or periodic airflow pulsation is easily formed in the intake pipe.

[0107] Constant speed driving condition: This refers to the state in which the vehicle cruises at a relatively constant speed. For example, as an example, the system can further subdivide this condition into three sub-conditions: low speed (e.g., 30 km / h), medium speed (e.g., 60 km / h), and high speed (e.g., 120 km / h). The noise under this condition is characterized by continuous single-frequency noise, which can easily cause auditory fatigue for passengers during long-term driving.

[0108] In this embodiment, the controller parses the operating condition codes sent by the CAN bus in real time.

[0109] For idling conditions: When the speed is detected to be in the idling range and the vehicle speed is zero, the controller sends a first command to the guide rail 9 and the adjusting motor 7, which drives the movable partition 11 to move to the preset idling condition position, so that the volume of the resonant cavity is adjusted to the level that can best suppress low-frequency noise at idle.

[0110] For acceleration or deceleration conditions: By monitoring the rate of change of the throttle valve, the system determines the transient acceleration or deceleration demand and quickly drives the regulating motor 7 to push the baffle to the corresponding acceleration or deceleration position, thereby achieving rapid capture and attenuation of transient noise.

[0111] For constant speed driving conditions: based on the current specific cruising speed range (such as 120km / h), it will accurately match the optimal position mark obtained by calibration at that speed and complete the fine adjustment of the movable partition 11 to ensure that the NVH performance during long-distance cruising is always in the optimal range.

[0112] For example, such as Figure 4 As shown, Figure 4 This is a comparison diagram of the transmission loss of the intake system under different operating conditions provided in an embodiment of this application. Figure 4 In the graph, the horizontal axis represents frequency (Hz), and the vertical axis represents transmission loss (dBA). Figure 4 The three curves correspond to the noise reduction performance of the movable partition 11 when it is located in three different calibration positions (such as working condition 1, working condition 2 and working condition 3).

[0113] Transmission loss refers to the difference in sound power level before and after the sound wave passes through the silencer 10. The larger the value, the stronger the system's ability to attenuate noise at that frequency. For example... Figure 4 As shown, by adjusting the motor 7 to drive the movable partition 11 to slide on the guide rail 9 to different working position holes 8, the volume V of the resonant cavity inside the muffler 10 changes accordingly. This physical change in volume directly leads to an overall shift in the acoustic characteristics of the muffler 10: Condition 1: This indicates that the movable partition 11 is in the first target position. At this time, the peak transmission loss is mainly concentrated between 900Hz and 2500Hz to 3000Hz. This position marking usually corresponds to a specific driving condition (such as high-speed constant speed condition) where the high-frequency energy of intake noise is relatively concentrated.

[0114] Condition 2: This represents the partition sliding to the second target position. It can be seen that the maximum noise reduction peaks occur around 700Hz, 1900Hz, and 2100Hz, and the attenuation in these frequency bands is significantly better than in other conditions. This indicates that under this volume condition, the acoustic impedance generated by the resonant cavity achieves a precise match with the dominant noise frequency under this condition.

[0115] Condition 3: This indicates that the partition is in the third target position. Its noise reduction characteristics are highly targeted at 1700Hz and 2300Hz, and it also has a specific acoustic attenuation bandwidth in the low-frequency range below 1000Hz.

[0116] In actual operation, the core of this dynamic adjustment logic lies in precise noise reduction on demand. The controller retrieves pre-stored calibration curve data from the memory based on the real-time identified operating conditions. For example, if the peak intake noise generated by the vehicle is around 1900Hz, the system will identify condition 2 as the optimal matching scheme, and then instruct the adjustment motor 7 to push the movable partition 11 to the physical hole position corresponding to condition 2.

[0117] Figure 4 This demonstrates the technical feasibility of covering full-frequency noise by changing the resonant cavity volume. It breaks through the physical limitations of traditional fixed mufflers, such as narrow silencing bandwidth and immovable peak values. It can actively customize the most suitable silencing curve based on the real-time spectral characteristics of the vehicle under different conditions such as idling, acceleration, or cruising, ensuring maximum transmission loss at every frequency fluctuation point. This allows the exhaust tailpipe noise to remain at the optimal target value throughout the entire operating range, significantly improving the overall NVH performance of the vehicle.

[0118] As can be seen, this embodiment establishes a control dimension covering the entire lifecycle of the vehicle's driving characteristics by refining the operating conditions into idling, acceleration, deceleration, and constant speed conditions at different speed ranges. It is worth noting that this embodiment utilizes a multi-discrete-point control strategy to replace the single-frequency passive noise reduction mode, enabling the acoustic package design to be deeply coupled with the complex vehicle dynamic response characteristics. It can target specific noise frequency bands under different operating conditions, ensuring that exhaust tailpipe noise reaches the target value regardless of whether it is starting, overtaking, or high-speed cruising, eliminating noise resonance under specific conditions. This solves the problem that the intake system's acoustic adjustment cannot follow real-time changes in driving intentions, enabling the vehicle to have optimal acoustic feedback under all operating conditions, greatly improving the vehicle's overall NVH quality and core market competitiveness.

[0119] In one embodiment, the intake system control method achieves deep alignment between noise reduction characteristics and driving conditions through precise parameter calibration and logic matching. The process of determining the target position of the movable partition 11 includes: matching the position identifier corresponding to the current operating condition based on multiple pre-calibrated position identifiers, and determining the position of the movable partition 11 corresponding to the matched position identifier as the target position.

[0120] Position markers refer to reference points stored in the controller's memory or defined by physical characteristics. Each marker uniquely corresponds to a specific volume state of the resonant cavity, which is the physical coordinate point that generates maximum noise reduction gain under a specific operating condition. The process of obtaining these position markers in advance reflects a precise transformation from acoustic requirements to mechanical execution.

[0121] During the calibration phase of vehicle research and development or production, the first step is to determine the target values ​​for the intake system tailpipe noise under various typical operating conditions based on the performance data and subjective evaluation data of benchmark vehicles. Subsequently, the actual tailpipe noise of the vehicle's intake system under different operating conditions is tested in a controlled environment to obtain the distribution pattern of noise variation with frequency. For example, for constant speed driving conditions, the acoustic characteristics at high speeds (e.g., 120 km / h), medium speeds (e.g., 60 km / h), and low speeds (e.g., 30 km / h) are tested separately.

[0122] By using spectrum analysis, technicians can precisely pinpoint the frequency range where exhaust noise energy is high under specific operating conditions, i.e., the primary noise frequency. Based on these specific frequency ranges, the volume of the resonant cavity is changed by adjusting the position of the movable baffle 11 of the muffler 10 until the tailpipe noise meets the preset target value. Finally, the positions of the movable baffle 11 under each operating condition are recorded and fixed with different position markers, such as idling position, acceleration position, deceleration position, and constant speed position.

[0123] During actual vehicle operation, once the controller identifies the current operating condition (e.g., the vehicle is traveling at a constant speed of 120 km / h), it automatically retrieves a matching constant speed operating condition position marker from a pre-set database. The system then uses the coordinates corresponding to this marker as the target position and directs the adjustment motor 7 to operate, ensuring the partition stops precisely.

[0124] As can be seen, in this embodiment, by matching operating conditions based on pre-calibrated position identifiers, a deterministic mapping from real-time driving intention to optimal acoustic response is established. This transforms the complex dynamic acoustic optimization problem into an efficient lookup and positioning task, eliminating the computational lag and position drift of the actuator during real-time adjustment. This ensures that the vehicle's intake noise reduction performance is always within the calibrated optimal range across the entire speed range and in all scenarios. It solves the pain point that traditional fixed intake systems cannot take into account noise at different frequencies, significantly improving the NVH performance of the vehicle's intake system, thereby enhancing the vehicle's market competitiveness and the quietness of the driving experience for users.

[0125] In one embodiment, the control method for the intake system also involves intelligent management of the moisture separation intensity in the intake air. Specifically, the method includes acquiring vehicle load parameters and adjusting the rotational speed of the water-air separator 1 based on these load parameters.

[0126] Load parameters refer to key physical variables reflecting engine operating status and intake air demand, which typically include, but are not limited to, throttle opening, intake manifold pressure, intake airflow, and real-time engine speed. These parameters can be monitored in real time by onboard sensors (such as air flow meters or pressure sensors), and the vehicle controller aggregates and analyzes the data via the CAN bus. The water-air separator 1 employs a controlled-rotation fan in its physical structure; its rotation speed directly determines the intensity of the centrifugal force generated on the intake airflow, thus affecting the efficiency of water separation from the gas phase.

[0127] In actual operation, the logic for adjusting the rotation speed of the water-air separator 1 follows a dynamic matching principle. When the vehicle's load parameters increase, such as during rapid acceleration or steep incline, the air intake increases significantly, resulting in a corresponding increase in the amount of condensate or external moisture entering the system. To prevent excessive moisture from entering the muffler 10 or engine combustion chamber, the controller outputs a higher-power drive signal, thereby increasing the rotation speed of the water-air separator 1. Conversely, when the vehicle is operating under low load or coasting downhill, the air intake decreases, automatically reducing the fan's rotation speed.

[0128] From a technical perspective, by establishing a correlation logic between load and rotation speed, a real-time balance between centrifugal separation intensity and inlet airflow velocity is achieved at the physical level. Since high rotation speed means stronger centrifugal inertial force, even under high flow rate conditions, tiny water droplets can be accurately thrown onto the wall of the silencer 10 and collected through the drain hole 6.

[0129] As can be seen, in this embodiment, firstly, by automatically increasing the moisture separation capacity under high-load conditions, the dryness of the intake system in complex environments is ensured, effectively protecting the subsequent acoustic structures from moisture erosion and extending the service life of the muffler 10 and the resonant cavity. Secondly, by reducing the engine speed under low-load conditions, the operating energy consumption and noise gain of the moisture separation device itself are greatly reduced, achieving an optimal solution for performance and energy efficiency. Finally, this adaptive adjustment mechanism improves the vehicle's operational reliability under various extreme climate and load conditions, and, in conjunction with the water storage unit 2, achieves efficient water resource recycling.

[0130] In one embodiment, the specific strategy for adjusting the rotation speed of the water-air separator 1 is as follows: when the load parameter is increased, the rotation speed is increased; when the load parameter is decreased, the rotation speed is decreased.

[0131] Load parameters refer to physical indicators characterizing the current working intensity and intake air demand of the engine, specifically including engine output torque, throttle opening, intake manifold pressure, or intake air volume per unit time. The water-air separator 1 adopts a fan-like structure with rotating blades, and its rotation speed is typically measured in revolutions per minute (RPM). The magnitude of the rotation speed directly determines the intensity of the centrifugal inertial force acting on the liquid water droplets in the intake airflow, and thus determines the separation efficiency of water separation from the gas phase.

[0132] In actual operation, the control system (such as the vehicle controller or engine control unit) monitors the changing trends of load parameters in real time. When an increase in load parameters is detected (e.g., the vehicle enters a rapid acceleration, steep incline, or a sudden increase in intake air volume), the controller increases the drive voltage or pulse duty cycle output to the moisture separator motor, thereby increasing the rotation speed of the moisture separator. The principle behind this adjustment mechanism is that under high load conditions, the intake airflow velocity is faster, and the total amount of moisture carried and the impact energy also increase. Increasing the rotation speed generates stronger centrifugal force, ensuring that moisture is promptly and fully thrown against the muffler 10 wall and enters the collection system. Conversely, when the load parameters are reduced (e.g., the vehicle is driving slowly on a flat road, cruising at a constant speed, or coasting downhill), the rotation speed of the moisture separator motor is automatically reduced, and it may even switch to a low-power operation mode while still meeting the intake air dryness requirements.

[0133] In this embodiment, by establishing a positive correlation adaptive adjustment logic between load parameters and rotation speed, the precise coupling between moisture separation capability and engine real-time demand is achieved. Dynamic speed control replaces the traditional fixed speed operation mode, enabling the system to adjust the power intensity in real time according to the risk of moisture content in the intake airflow.

[0134] Under harsh, high-load conditions, increasing the rotation speed enhances the water separation effect, effectively preventing the risk of damage caused by excessive water entering the engine combustion chamber and ensuring the safe operation of the engine. Under low-load conditions, reducing the rotation speed avoids unnecessary idling energy consumption of the actuator motor. While realizing water resource recycling, it also reduces the overall power consumption of the system, reduces operating noise, and extends the physical service life of the motor.

[0135] In one embodiment, the control method for the air intake system also involves intelligent scheduling of the water recovery path to achieve refined allocation of water resources. Specifically, this method includes controlling the regulating motor 7 to open the external circulation drain valve 3, or to open the vehicle water tank interface valve 4, or to open the air humidifier interface valve 5, according to valve control commands.

[0136] Valve control commands are logical control signals generated by the vehicle controller (such as VCU or ECU) based on a comprehensive evaluation of the water level in the water storage unit 2, the consumption needs of the vehicle subsystems, and user manual commands. These commands can be acquired in various ways and correspond to different application scenarios: for example, when the level sensor in the water storage unit 2 detects that the water level has reached a preset upper limit, the system will automatically generate a discharge command; or when the vehicle's thermal management system detects insufficient water level in the main water tank, or when the air conditioning system senses that the cabin humidity is too low and needs humidification, corresponding water replenishment or humidification command will be generated respectively.

[0137] In the actual control process, this method fully utilizes the multi-functional shared characteristics of the regulating motor 7. When the vehicle controller recognizes a specific valve control command, it sends the corresponding execution power or position signal to the regulating motor 7 via the CAN bus. Since the regulating motor 7 is connected to multiple functional components through a transmission mechanism, the motor will run to a specific stroke range or trigger specific mechanical linkage logic after receiving the signal. As a result of this mechanical action, without interfering with or coordinating with acoustic regulation, the target valve (such as the bottom drain valve, the side water tank interface valve, or the humidifier interface valve) is precisely driven from the closed state to the open state, thereby guiding the stored water flow to the corresponding external circulation, vehicle water tank, or air humidifier.

[0138] This control logic establishes a closed-loop link from environmental moisture capture to in-vehicle resource allocation. The purpose of this control method is to transform condensate, originally a burden of the intake system, into a dispatchable vehicle resource, and to complete complex valve switching tasks using a single power source. By intelligently controlling the flow of water to different circulation loops, it achieves both external water recycling and internal vehicle replenishment, realizing the technical goal of full water resource recovery and utilization, and reducing the frequency of manual water addition by the user. Since the resonant cavity volume adjustment, drain valve adjustment, and the adjustment of multiple interface valves all share the same regulating motor 7, the need for a separate actuator for each valve is avoided. This not only significantly improves the system's structural compactness but also greatly reduces hardware procurement costs and the complexity of the vehicle's wiring harness. Furthermore, it can automatically switch water flow paths according to real-time needs, effectively solving the environmental hazards caused by the uncontrollable drainage of traditional intake systems, giving the vehicle a greater environmental competitive advantage during operation.

[0139] Example 4 In one embodiment, such as Figure 5 As shown, a control method for an intake system is also provided. The control strategy for the aforementioned intake system with water storage and adjustable resonant cavity first involves designing its structure according to the intake system described above, and then controlling the intake system according to the following steps: S201. Based on benchmark vehicles and subjective evaluation data, determine the target value of the tailpipe noise of the intake system under various operating conditions of the vehicle, and determine the position of the movable baffle 10 of the intake system under different operating conditions. This step primarily tests the tailpipe noise of the intake system under different operating conditions of the vehicle, and identifies the corresponding positions of the movable baffles under different operating conditions. In the constant speed condition, the exhaust system tailpipe noise was tested at high (120km / h), medium (60km / h), and low (30km / h) vehicle speeds. The frequency range where the exhaust noise was greater than the preset noise was analyzed. The muffler of the intake system for each condition was designed to meet the tailpipe noise target value for each condition. The position of the muffler baffle of the intake system under different conditions was determined and marked. For example, the idle condition was marked as the idle condition position, the acceleration condition was marked as the acceleration condition position, the deceleration condition was marked as the deceleration condition position, and the constant speed condition was marked as the constant speed condition position.

[0140] S202, The controller reads the vehicle speed and load parameters; Rotational speed is used to determine the current operating conditions of the vehicle, while load parameters are used to adjust the rotational speed of the water-air separator.

[0141] S203. The controller transmits signals via the CAN bus according to the vehicle's operating conditions to control the regulating motor 7 in the intake system to adjust the position of the movable partition 11 according to the corresponding operating conditions. For vehicle idling conditions, the vehicle controller is connected via CAN to identify the vehicle idling conditions. Based on the vehicle conditions, a command is sent to the guide rail adjustment motor 4. The guide rail adjustment motor 4 drives the baffle of the muffler 10 to move on the guide rail 5 to the idling position of the working condition position hole 8 to achieve the adjustment of the baffle of the muffler 10, thereby achieving the purpose of controlling the tailpipe noise of the vehicle idling conditions. Once the vehicle starts and stabilizes, it enters the driving condition. When the vehicle accelerates, the vehicle controller identifies the vehicle's acceleration condition via CAN. Based on the vehicle's condition, the controller sends a command to the guide rail adjustment motor 4. The guide rail adjustment motor 4 drives the baffle of the muffler 10 to move on the guide rail 5 to the acceleration position of the working condition position hole 8, thereby adjusting the baffle of the muffler 10 and controlling the tailpipe noise during vehicle acceleration. When the vehicle is in a deceleration condition, the vehicle controller is identified through CAN access. Based on the vehicle condition, a command is sent to the guide rail motor 4. The guide rail motor 4 drives the baffle of the muffler 10 to move on the guide rail 5 to the deceleration position of the working condition position hole 8, thereby adjusting the baffle of the muffler 10 and controlling the tailpipe noise during vehicle deceleration. When the vehicle is in a constant speed driving condition, the vehicle controller is identified through CAN access to identify the constant speed driving condition. According to the vehicle condition, the controller sends a command to the guide rail motor 4, which drives the baffle of the muffler 10 to move on the guide rail 5 to the position of the constant speed driving condition in the working condition position hole 8, thereby adjusting the baffle of the muffler 10 and achieving the purpose of controlling the tailpipe noise when the vehicle is in a constant speed driving condition. S204. The controller determines whether the position of the movable baffle 10 of the intake system is accurate. If it is accurate, the adjustment ends; if it is not accurate, the adjustment continues until it is correct. S205. For the above operating conditions of the vehicle, the water-air separation device 1 in the air intake system of the controller is always working, and the electric drain valve is controlled by the guide rail adjusting motor 7 to recover and utilize the water.

[0142] This cycle is repeated to adjust the intake system structure under different operating conditions of the vehicle, ensuring that the vehicle has good NVH performance of the intake system.

[0143] This application provides a controller 60, which serves as the intelligent scheduling center of the intake system, responsible for coordinating and executing complex acoustic adjustment strategies and moisture management logic. The controller 60 includes a memory 610, a processor 620, and a computer program stored in the memory and executable on the processor 620.

[0144] Processor 620 refers to an integrated circuit chip with data processing capabilities, serving as the core of the controller's operation. As an example, processor 620 can be a general-purpose central processing unit (CPU), microcontroller unit (MCU), digital signal processor (DSP), or field-programmable gate array (FPGA). Its main function is to parse and execute logical instructions in computer programs, performing arithmetic operations and logical judgments on the data.

[0145] Memory 610 refers to a hardware device used to store digital information and programs, undertaking the tasks of data storage and retrieval. As an example, memory 610 may include random access memory (RAM), read-only memory (ROM), flash memory, or non-volatile semiconductor memory. Memory 610 pre-stores computer programs, as well as various operating condition location markers, noise frequency thresholds, and moisture recovery logic parameters that have been experimentally calibrated in the foregoing embodiments.

[0146] A computer program is a sequence of instructions compiled to achieve a specific technical objective and executable by a processor. In actual processing, the processor retrieves and runs the computer program from memory to implement the control method for the intake system. For details, please refer to the various embodiments corresponding to the control method described above, which will not be repeated here.

[0147] As an example, the processor 620 acquires and identifies the vehicle's current operating parameters in real time, such as engine speed, vehicle speed, and throttle opening, via a CAN bus or dedicated sensor interface. Next, the program logic matches the real-time data with preset identifiers in memory to accurately determine the target position coordinates of the movable partition under the current operating conditions. Subsequently, the processor 620 outputs control pulses or drive voltage signals to the regulating motor 7, directing the movable partition 10 to slide precisely along the guide rail, completing the instantaneous reconstruction of the resonant cavity volume to match the current silencing frequency requirements. Furthermore, the program is also responsible for monitoring the vehicle load, dynamically adjusting the rotation speed of the water-air separator, and, based on real-time commands for cabin humidification or water tank replenishment, driving the regulating motor 7 to perform opening and closing actions of different strokes, completing the intelligent switching of various valves.

[0148] This application also provides a vehicle that serves as an integrated mobile platform carrying the aforementioned intake system and control logic. Through deep integration of hardware architecture and software intelligence, it achieves a dual improvement in driving quality and resource efficiency. The vehicle includes the intake system as described in any of the foregoing embodiments, and a controller for coordinating and scheduling the system.

[0149] A vehicle refers to a power-driven, non-rail-supported vehicle with four or more wheels, whose internal engine compartment integrates the air intake system provided in this application embodiment. Exemplarily, this air intake system includes an air intake hardware system comprising a muffler, a regulating motor, a water-air separator, and a water storage unit. The controller, acting as the vehicle's electronic brain, establishes communication links with various sensors and actuators of the vehicle via a CAN bus, and is responsible for performing complex environmental perception and action scheduling tasks.

[0150] In actual handling and driving scenarios, the vehicle exhibits a highly adaptive operating mode. For example, when the vehicle starts and enters different driving conditions (such as idling in congested urban areas, accelerating to overtake on ring roads, or long-term cruising on highways), the controller analyzes the current driving intention and environmental parameters in real time. As an example, in a high-speed cruising scenario, the controller identifies a stable high-speed condition and then drives the regulating motor in the intake system to precisely stop the movable baffle in the muffler at a preset constant-speed position hole, thereby suppressing intake noise to a minimum. At the same time, the water-air separator installed at the muffler inlet continuously captures moisture in the intake air and collects it in the water storage compartment; if the cabin air conditioning is turned on at this time, causing the environment to be dry, the controller will link the regulating motor to open the air humidifier interface valve, directly using the collected water to improve the comfort of the passengers.

[0151] In this embodiment, the dynamically adjustable resonant cavity and water circulation function are integrated on a vehicle-wide scale, achieving comprehensive optimization of the vehicle from its underlying mechanical architecture to its high-level management logic. A closed-loop energy and resource management system is established, transforming the intake system from an isolated noise-reducing component into an intelligent subsystem capable of real-time interaction with vehicle driving status and passenger comfort needs. Through global scheduling by the vehicle controller, the intake NVH performance is ensured to remain physically optimal across the entire speed range from start-up to high-speed driving, significantly enhancing the vehicle's premium feel and market competitiveness. Utilizing the byproduct water generated during vehicle operation to replenish the vehicle's water tank or improve cabin humidity not only achieves full water resource recovery and utilization but also reduces user maintenance frequency and energy consumption. Because the controller enables reuse management of multiple valves and mechanisms controlled by a single motor, the number of electronic components in the vehicle is reduced, lowering the risk of electrical failures and overall vehicle weight, achieving a balance between energy saving, emission reduction, and system robustness.

[0152] This application also provides a computer-readable storage medium storing a computer program that, when executed by a processor, implements the intake system control method described in any embodiment of this application.

[0153] In this application, "multiple" refers to two or more.

[0154] In this application, unless otherwise expressly defined, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0155] The terms “first,” “second,” “third,” “fourth,” etc., in this application (if present) are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

[0156] In this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, in this application, the character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0157] Unless otherwise specified, all steps in this application may be performed sequentially or randomly. For example, if the method includes steps A and B, it means that the method may include steps A and B performed sequentially, or it may include steps B and A performed sequentially. For example, if the method may also include step C, it means that step C may be added to the method in any order. For example, the method may include steps A, B, and C, or it may include steps A, C, and B, or it may include steps C, A, and B, etc.

[0158] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. An intake system, characterized in that, include: A muffler, wherein a movable partition is provided inside the muffler, and the movable partition divides the internal space of the muffler to form a resonant cavity; An adjustment motor is driven and connected to the movable partition, and is used to drive the movable partition to move according to the vehicle's operating conditions, so as to change the volume of the resonant cavity.

2. The intake system according to claim 1, characterized in that, The muffler has a guide rail inside for defining the moving path of the movable partition, and the movable partition slides along the guide rail driven by the adjusting motor.

3. The intake system according to claim 2, characterized in that, The guide rail is provided with multiple working condition position holes, which are used to limit the movement position of the movable partition under different operating conditions of the vehicle.

4. The intake system according to claim 1, characterized in that, The air intake system also includes a water-air separation device and a water storage unit; The water storage section is provided with multiple water leakage holes, and the water storage section is connected to the interior of the silencer through the multiple water leakage holes; The water-air separator is installed at the inlet of the muffler, and the water storage unit is installed on the muffler body to collect the water separated by the water-air separator.

5. The intake system according to claim 4, characterized in that, The water storage unit is equipped with a fluid channel for guiding water flow. One end of the fluid channel is connected to the drain hole, and the other end is connected to the water storage chamber of the water storage unit.

6. The intake system according to claim 4, characterized in that, The bottom of the water storage unit is provided with an external circulation drain valve, and the side of the water storage unit is provided with a vehicle water tank interface valve and an air humidifier interface valve. The external circulation drain valve, the vehicle water tank interface valve and the air humidifier interface valve are respectively connected to the regulating motor.

7. A control method for an intake system, characterized in that, The method, applicable to the intake system as described in any one of claims 1-6, comprises: Identify the current operating condition of the vehicle; Based on the operating conditions, determine the target position of the movable partition; The adjustment motor is controlled to drive the movable partition to move to the target position, thereby adjusting the volume of the resonant cavity.

8. The control method according to claim 7, characterized in that, The operating conditions include at least one of the following: idling, acceleration, deceleration, and constant speed driving.

9. The control method according to claim 7, characterized in that, Determining the target position of the movable partition includes: Based on multiple pre-calibrated location identifiers, the location identifier corresponding to the current operating condition is matched, and the location of the movable partition corresponding to the matched location identifier is determined as the target location; The multiple location identifiers are obtained in advance by: testing the tailpipe noise frequency distribution of the vehicle under different operating conditions to analyze the frequency range where the exhaust noise is greater than the preset noise; determining the position of the movable baffle of the muffler under each operating condition based on the frequency range, and recording the position of the movable baffle of the muffler under each operating condition using different location identifiers.

10. The control method according to claim 7, characterized in that, The method further includes: The load parameters of the vehicle are obtained, and the rotation speed of the water-air separator is adjusted based on the load parameters.

11. The control method according to claim 10, characterized in that, The adjustment of the rotational speed of the water-air separator includes: When the load parameter is increased, the rotation speed is increased; When the load parameter is reduced, the rotation speed is decreased.

12. The control method according to any one of claims 7-11, characterized in that, The method further includes: According to the valve control command, the regulating motor is controlled to open / close the external circulation drain valve, or open / close the vehicle water tank interface valve, or open / close the air humidifier interface valve.

13. A controller comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that, When the processor executes the computer program, it implements the control method of the intake system according to any one of claims 7-12.

14. A vehicle, characterized in that, Includes the intake system as described in any one of claims 1 to 6, and the controller as described in claim 13.

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