Closed air suspension system and vehicle

Abstract

The utility model provides a closed type air suspension system and a vehicle. The closed type air suspension system comprises a whole vehicle power source, a signal input module, an air supply module and an execution component. The whole vehicle power supply is configured to supply power to the closed air suspension system; the signal input module is configured to receive an external signal and obtain a state signal of the gas supply module; the gas supply module comprises a control module and a mechanical module; the control module is configured to output a control signal according to an external signal and a state signal of the gas supply module; the mechanical module comprises an inflating pump, and the inflating pump operates based on the control signal; and the execution component is connected with the air supply module, comprises an air spring and an air storage tank, and is configured to perform inflation and deflation operation according to the control signal and the inflation pump. More direct and effective control over inflation and deflation of the air spring is achieved, complex air paths are prevented from being designed, meanwhile, the number of electromagnetic valves in the system is reduced, the system complexity is reduced, and the overall cost of the system is reduced.

Description

Technical Field

[0001] The present application belongs to the technical field of vehicle chassis, and in particular relates to a closed air suspension system and a vehicle. Background Art

[0002] The air suspension system has become a standard feature of many high-end models because it can automatically adjust and maintain a stable vehicle height according to different driving conditions, thereby significantly improving the vehicle's passability, handling and stability. Compared with traditional suspension systems, air suspension not only greatly improves passenger comfort, but also has the function of adjusting the vehicle height to achieve multiple design goals such as saving energy, optimizing off-road performance, facilitating passengers to get on and off the vehicle, and protecting batteries.

[0003] Air suspension systems are usually divided into two types: open and closed systems, depending on the degree of exchange of air between the system and the outside air. The closed air suspension system has compressed air at a certain pressure built in. When the vehicle body is raised, the air pump will send the compressed air in the air tank into the air spring; when the vehicle body is lowered, the air pump will pump the compressed air in the air spring back into the air tank.

[0004] The gas circuit design of the closed system is more complicated because it is necessary to achieve bidirectional flow of gas between the gas tank and the air spring. Usually, this type of system uses a brushed motor to drive the air pump. Since the air pump can only pump air in one direction, it is necessary to use a combination of multiple solenoid valves to achieve the required bidirectional gas flow function. Although this design is comprehensive, it also makes the system structure more complicated, which in turn leads to an increase in overall cost.

[0005] Therefore, how to provide a closed air suspension system to overcome the above problems has become a technical problem that technical personnel in this field need to solve urgently. Utility Model Content

[0006] The purpose of this application is to provide a closed air suspension system and vehicle to achieve more direct and effective control of the inflation and deflation of the air spring, avoid the design of complex air circuits, and reduce the number of solenoid valves in the system to reduce system complexity and reduce the overall system cost.

[0007] In a first aspect, the present application provides a closed air suspension system, the closed air suspension system comprising: a vehicle power supply, a signal input module, an air supply module, and an actuator;

[0008] The vehicle power supply is configured to supply power to the closed air suspension system;

[0009] The signal input module is configured to receive an external signal and obtain a status signal of the gas supply module;

[0010] The air supply module includes a control module and a mechanical module; the control module is configured to output a control signal according to the external signal and the state signal of the air supply module; the mechanical module includes an air pump, and the air pump operates based on the control signal;

[0011] The actuator is connected to the air supply module, includes an air spring and an air storage tank, and is configured to perform inflation and deflation operations according to the control signal and the air pump.

[0012] In an implementation of the first aspect, the mechanical module includes a preset number of air spring gas circuit solenoid valves, gas tank gas circuit solenoid valves, and exhaust gas circuit solenoid valves, which are configured to control the opening and closing of corresponding gas circuits.

[0013] In an implementation of the first aspect, the air spring solenoid valves are electrically connected to the control module, respectively, and are configured to independently control the inflation and exhaust states of the corresponding air springs.

[0014] In an implementation of the first aspect, the gas tank gas circuit solenoid valve is connected to the gas tank and is configured to automatically adjust the gas supply from the gas tank to the air spring based on the control signal.

[0015] In an implementation of the first aspect, one end of the exhaust gas circuit solenoid valve is connected to the internal gas circuit pipeline of the air supply module, and the other end is connected to the atmosphere, and is configured to be activated when the air spring is exhausted.

[0016] In an implementation of the first aspect, the mechanical module includes a pressure limiting valve, a pressure sensor, and a temperature sensor, which are configured to monitor the internal air pressure of the system and the temperature status of the air pump in real time, and to implement over-pressure and over-temperature protection.

[0017] In an implementation of the first aspect, the mechanical module also includes drying, filtering, and noise reduction accessories configured to process the air entering the system.

[0018] In an implementation of the first aspect, the mechanical module includes a first one-way valve and a second one-way valve, one end of the one-way valve is connected to the atmosphere, and the other end is connected to the air pipeline of the air supply module, and is configured to replenish gas from the outside atmosphere to the inside of the system when the air pressure inside the air supply module is lower than the atmospheric pressure.

[0019] In an implementation of the first aspect, the first one-way valve is arranged on one side of the air pump, and is unidirectionally conducted when the air tank needs to be replenished with air from the outside atmosphere, thereby replenishing the air tank; the second one-way valve is arranged on the other side of the air pump, and is unidirectionally conducted when the air spring needs to be inflated with air from the outside atmosphere, thereby replenishing the air spring.

[0020] In a second aspect, the present application provides a vehicle, comprising the closed air suspension system as described above.

[0021] As described above, the closed air suspension system and vehicle described in this application have the following beneficial effects:

[0022] The closed air suspension system provided by the utility model can more accurately control the inflation and deflation process of the air suspension system by using the characteristics of the brushless motor which is easy to adjust the speed, has low energy consumption and low noise. At the same time, the air pump can pump air in different directions by controlling the rotation direction of the motor, thereby realizing the inflation and deflation operations of the air spring in the closed air spring system, reducing the complexity of the system air circuit design and the number of solenoid valves in the system, thereby reducing the overall system complexity and the overall system cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 Shown is a schematic structural diagram of a closed air suspension system described in an embodiment of the present application.

[0024] Figure 2a Shown is a schematic diagram of the mechanical structure of the closed air suspension system described in an embodiment of the present application.

[0025] Figure 2b Shown is a schematic diagram of the air circuit of the air supply module of the closed air suspension system described in an embodiment of the present application.

[0026] Component number description

[0027] 1 Closed air suspension system

[0028] 11 Vehicle power supply

[0029] 12 Signal input module

[0030] 13 Air supply module

[0031] 14 Execution components

[0032] 131 Control Module

[0033] 132 Mechanical Module

[0034] 141 Air spring

[0035] 142 Gas Tank

[0036] 21 Air pump

[0037] 22a Air spring air circuit solenoid valve

[0038] 22b Gas tank gas line solenoid valve

[0039] 22c Exhaust gas line solenoid valve

[0040] 23 Pressure limiting valve

[0041] 24 Pressure Sensor

[0042] 25 Temperature Sensor

[0043] 26 Drying, Filtration, Noise Reduction Accessories

[0044] 27 First check valve

[0045] 28 Second check valve

[0046] 29 Gas pipeline DETAILED DESCRIPTION

[0047] The following describes the embodiments of the present application through specific examples, and those skilled in the art can easily understand other advantages and effects of the present application from the contents disclosed in this specification. The present application can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present application. It should be noted that the following embodiments and features in the embodiments can be combined with each other without conflict.

[0048] It should be noted that the illustrations provided in the following embodiments are only schematic illustrations of the basic concept of the present application, and thus the drawings only show components related to the present application rather than being drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component may be changed at will, and the component layout may also be more complicated.

[0049] The following embodiments of the present application provide a closed air suspension system and a vehicle, which achieve more direct and effective control over the inflation and deflation of the air spring, avoid the design of complex air circuits, and reduce the number of solenoid valves in the system to reduce system complexity and overall system cost.

[0050] The principles and implementation methods of a closed air suspension system and a vehicle of this embodiment will be described in detail below in conjunction with the accompanying drawings so that those skilled in the art can understand the closed air suspension system and the vehicle of this embodiment without creative work.

[0051] like Figure 1 As shown, this embodiment provides a closed air suspension system, which includes: a vehicle power supply 11, a signal input module 12, an air supply module 13, and an actuator 14;

[0052] The vehicle power supply 11 is configured to supply power to the closed air suspension system;

[0053] The signal input module 12 is configured to receive external signals and obtain status signals of the gas supply module 13;

[0054] The air supply module 13 includes a control module 131 and a mechanical module 132; the control module 131 is configured to output a control signal according to the external signal and the air supply module status signal; the mechanical module 132 includes an air pump 21, and the air pump 21 operates based on the control signal;

[0055] The actuator 14 is connected to the air supply module 13 , includes an air spring 141 and an air storage tank 142 , and is configured to perform inflation and deflation operations according to the control signal and the air pump 21 .

[0056] Specifically, the vehicle power supply 11 is connected to the air supply module 13, and the vehicle power supply provides power supply services for the entire system 11, and supplies power to various modules of the air supply system control device and mechanical device. The signal input module 12 is connected to the air supply module 13, and provides the required input signal to the control module 131 of the entire air supply module 13, and at the same time sends the signals such as the system operation status and fault detection status of the air supply module 13 to the vehicle CAN network. The system air supply module 13 includes a control module 131 and a mechanical module 132. The two are integrated and designed together in structure, and there is signal interaction between the two. The control module 131 makes algorithm decisions based on the received external signal combined with the system's own state signal and outputs a control signal to the mechanical module 132 to realize the control of the pump and valve, thereby realizing the control of the actuator 14. The actuator 14, that is, the external vehicle actuator module, includes an air spring 141 and an air tank 142, both of which are connected to the air supply module 13 through a pipeline, and the charging and discharging of the two parts are realized through the control of the air supply module 13.

[0057] See also Figure 2a to Figure 2b , Figure 2a The structure diagram of the mechanical device of the closed air suspension system described in the present application is shown in one embodiment. Figure 2b Shown is a schematic diagram of the air circuit of an air supply module of a closed air suspension system described in the present application in one embodiment.

[0058] The utility model is different from the traditional closed air suspension system in that a brushless DC motor is used as the power source of the air pump 21, and a brushless motor control system is integrated in the air circuit system. The system can perform closed-loop control of the motor speed, and can realize the motor rotating in a specified direction, so that the air pump can pump air in different directions with different rotation directions.

[0059] In the closed air suspension system, the bidirectional pump using a brushless DC motor plays a vital role. It adjusts the state of the air spring 141 by precisely controlling the direction and flow of the pumping air to adapt to different driving conditions and driving requirements.

[0060] Brushless DC motors are widely used in automotive suspension systems due to their high efficiency, long life and low maintenance requirements. Brushless motors can provide continuous and smooth torque output, suitable for applications that require high-precision control. The bidirectional pump can pump air in two different directions as needed. This means that it can pump air into the air spring 141 to increase the height of the vehicle body, or extract air from the air spring 141 to lower the height of the vehicle body according to the instructions of the control module 131. The closed-loop control system of the motor ensures that the motor runs in the set rotation direction and speed. Through the real-time feedback mechanism, the control module 131 can adjust the drive signal of the motor to compensate for any deviations to ensure the accurate and reliable operation of the system. The control module 131 receives various signals from the vehicle, including CAN bus signals (such as vehicle speed, acceleration, braking status, etc.), sensor signals (such as pressure sensors, height sensors, etc.), and feedback signals within the system. Based on the aforementioned signals, the algorithm running inside the control module performs complex operations based on these input signals. The air spring control algorithm may consider the current load, driving speed and road conditions of the vehicle to determine the required suspension stiffness and height. The motor operation control algorithm is responsible for calculating the necessary pumping direction and flow rate to achieve the goal of the air spring control algorithm. Based on the decision of the algorithm, the control module 131 outputs a drive signal to the DC brushless motor to instruct it to perform precise forward or reverse rotation and adjust the speed. In this way, the bidirectional pump can pump air to the air spring side or to the air tank side as needed, and control the air supply flow by adjusting the speed. Based on this, the closed-loop control and algorithm decision-making process of the system are continuously optimized to achieve the best suspension performance. This includes providing sufficient comfort, ensuring vehicle stability, and adapting to different driving styles and road conditions.

[0061] Specifically, the mechanical module 132 includes a preset number of air spring gas circuit solenoid valves 22a, gas tank gas circuit solenoid valves 22b, and exhaust gas circuit solenoid valves 22c, which are configured to control the opening and closing of corresponding gas circuits.

[0062] Furthermore, the air spring gas circuit solenoid valves 22 a are electrically connected to the control module 131 , respectively, and are configured to independently control the inflation and exhaust states of the corresponding air springs 141 .

[0063] Furthermore, the gas tank gas circuit solenoid valve 22 b is connected to the gas tank 142 , and is configured to automatically adjust the gas supply from the gas tank 142 to the air spring 141 based on the control signal.

[0064] Furthermore, one end of the exhaust gas circuit solenoid valve 22 c is connected to the internal gas circuit pipeline 29 of the air supply module 13 , and the other end is connected to the atmosphere, and is configured to be activated when the air spring 141 is exhausted.

[0065] Specifically, the mechanical module 132 of the air supply module 13 includes an air pump 21 using a brushless motor. The air pump motor receives the signal output by the control module 131 to realize forward and reverse rotation and operation at a specified speed according to the requirements of the control algorithm, and drives the air pump 21 to operate to realize pumping operation in a specified direction, and realizes the control of the pumping air flow through speed control.

[0066] In the closed air suspension system, the structural setting of the solenoid valve is a key component, which is mainly responsible for controlling the on-off of the air path inside the system, thereby achieving precise control of the air spring 141 and the air tank 142.

[0067] The closed air suspension system described in the present application has a plurality of solenoid valves, which are respectively used to control the on-off of the four air spring air circuits, the air tank air circuit and the exhaust air circuit. These solenoid valves are operated by receiving signals from the control device to achieve different functions.

[0068] The air spring gas circuit solenoid valve 22a is directly connected to the air springs at the front left (FL), front right (FR), rear left (RL), and rear right (RR) positions of the closed air suspension system. They are mainly responsible for the inflation and exhaust of each air spring 141, thereby adjusting the height and suspension hardness of the vehicle. The switch of the valve is controlled by the output signal of the control module 131 to achieve precise control of the state of the air spring 141.

[0069] The gas tank gas circuit solenoid valve 22b is used to control the filling and discharging of the gas tank 142. The operation of this valve is also realized by the signal of the control module 131, which is very important for managing the pressure and gas flow of the gas tank 142.

[0070] The exhaust gas circuit solenoid valve 22c is used to exhaust the gas inside the system to the outside atmosphere. Its operation is also controlled by the output signal of the control module 131 to ensure that the system pressure is maintained within a safe range.

[0071] Specifically, the mechanical module 132 includes a pressure limiting valve 23, a pressure sensor 24 and a temperature sensor 25, which are configured to monitor the internal air pressure of the system and the temperature state of the air pump 21 in real time, and realize over-pressure and over-temperature protection.

[0072] In the mechanical module 132 of the closed air suspension system, the pressure limiting valve 23, the pressure sensor 24 and the temperature sensor 25 are key components to ensure the safe and efficient operation of the system. These components prevent overpressure and overtemperature by real-time monitoring and adjusting the internal air pressure of the system and the temperature of the air pump 21.

[0073] The main function of the pressure limiting valve 23 is to protect the system from being damaged by excessive pressure. When the air pressure inside the system exceeds the preset safety threshold, the pressure limiting valve automatically opens to release the excess air pressure, thereby reducing the pressure inside the system to a safe level. In one embodiment, the pressure limiting valve 23 is a spring device containing a preset pressure value. When the force exerted by the air pressure on the valve is greater than the resistance of the spring, the valve is opened and the overpressure gas is released. Once the air pressure drops to a safe range, the valve will close again to keep the system sealed.

[0074] The pressure sensor 24 is used to monitor the air pressure in the air suspension system, including the air pressure inside the air spring 141 and the entire system. Through a specific valve opening and closing combination, the gas pressure in each cavity of the air spring 141 and the air tank 142 can be measured, and the pressure signal can be fed back to the control module 131 for further regulation. In one embodiment, the pressure sensor 24 uses piezoelectric effect or strain gauge technology to convert changes in air pressure into electrical signals. These electrical signals are sent to the control module 131, and the control module 131 adjusts the operation of the air pump 21 based on this information to maintain or adjust to the desired air pressure level.

[0075] The temperature sensor 25 is used to monitor the working temperature of the air pump 21 in real time and feed it back to the control module 131 to avoid damage to the pump body or performance degradation due to overheating. In one embodiment, the temperature sensor 25 uses technologies such as thermistors (such as NTC or PTC) or thermocouples, which can convert temperature changes into resistance or voltage changes, thereby generating electrical signals related to temperature. After receiving these signals, the control module 131 can take corresponding measures, such as reducing the speed of the pump or temporarily shutting it down, to prevent overheating.

[0076] The data of the pressure sensor 24 and the temperature sensor 25 are transmitted to the control module 131 in real time. The control module 131 determines the open and closed state of each solenoid valve through an algorithm decision-making process based on the signals obtained from the sensors and the vehicle CAN network, and decides whether to adjust the working state of the air pump 21 or activate the pressure limiting valve to protect the system. This control logic ensures the dynamic response and precise control of the system to adapt to different driving conditions and ride comfort requirements.

[0077] Through this integrated monitoring, the system can achieve overpressure and overtemperature protection, ensuring that the suspension system operates within a safe pressure and temperature range, extending the system life, and improving vehicle safety and comfort. Through the collaborative work of these key components, the closed air suspension system can achieve highly autonomous and intelligent operation, improving the overall performance and reliability of the system.

[0078] Specifically, the mechanical module 132 also includes a drying, filtering, and noise reduction accessory 26, which is configured to process the air entering the system.

[0079] In the closed air suspension system, important components of the mechanical module 132 include drying, filtering, and noise reduction accessories 26. These accessories are responsible for processing the air entering the system, ensuring air quality, and protecting the internal components of the system from contamination and damage. Drying accessories: The main function is to remove moisture from the air entering the system. The presence of moisture may cause corrosion of internal components, increase wear of the system, and reduce its efficiency and life. Drying accessories usually use desiccants, such as silica gel or molecular sieves, which can absorb water vapor in the air. After absorbing a certain amount of moisture, the desiccant can be regenerated by heating for reuse. Filter accessories: Used to remove dust, particles and other potential contaminants from the air entering the system. These contaminants may damage delicate components inside the system, such as pressure sensors and solenoid valves. Filters are usually made of high-density fiber materials or porous foams, which can effectively intercept and capture suspended particles in the air. Some filters are designed to be washable and reusable, while others may need to be replaced periodically. Noise reduction accessories: The purpose is to reduce the noise generated when the system is running and provide a more comfortable driving experience. Noise reduction measures can include the application of soundproofing materials, such as acoustic foam, and design improvements, such as the use of streamlined airflow paths and vibration dampening devices. These designs help reduce turbulence and vibrations generated when air flows through the system, thereby reducing noise levels.

[0080] By integrating drying, filtering and noise reduction accessories that work in conjunction with other system components, they work together to maintain system performance and extend service life. By ensuring the quality of air entering the system, these accessories help protect critical components from contamination and damage. Although these accessories do not typically require frequent maintenance, regular inspection and replacement of desiccants and filters is necessary to keep the system running efficiently. The control module monitors the status of these accessories and alerts the operator to perform maintenance when necessary.

[0081] Through the integration of these accessories, the closed air suspension system is able to operate more efficiently while improving passenger comfort and long-term system reliability.

[0082] Specifically, the mechanical module 132 includes a first one-way valve 27 and a second one-way valve 28, one end of which is connected to the atmosphere, and the other end is connected to the air circuit 29 of the air supply module 13, and is configured to replenish gas from the outside atmosphere to the inside of the system when the air pressure inside the air supply module 13 is lower than the atmospheric pressure. The first one-way valve 27 is arranged on one side of the air pump 21, and is unidirectionally conducted when the air tank 142 needs to be supplemented with air from the outside atmosphere, thereby replenishing the air tank 142; the second one-way valve 28 is arranged on the other side of the air pump 21, and is unidirectionally conducted when the air spring 141 needs to be inflated with air from the outside atmosphere, thereby replenishing the air spring 141.

[0083] In the mechanical module 132 of the closed air suspension system, the first one-way valve 27 and the second one-way valve 28 are key components, which ensure that the system can replenish gas from the outside atmosphere when the internal air pressure is lower than the atmospheric pressure. This design ensures the flexibility and responsiveness of the system, especially when the suspension stiffness or height needs to be adjusted quickly.

[0084] The main function of the first one-way valve 27 is to allow gas from the outside atmosphere to flow into the system, especially to replenish the gas tank 142, when the internal air pressure of the air supply module 13 is lower than the atmospheric pressure. This one-way valve is usually set on one side of the air pump 21, and it only allows gas to flow in one direction, that is, from the outside to the gas tank 142. When it is detected that the air pressure of the gas tank 142 is lower than the set value, the control module 131 will activate the air pump 21 and open the first one-way valve 27, thereby inhaling outside air to replenish the gas tank. This design ensures that the gas tank can be quickly refilled to meet the needs of the system.

[0085] The second one-way valve 28 is used to inflate the air spring 141 directly from the outside atmosphere when needed. The second one-way valve 28 is usually set on the other side of the air pump 21, and it is also designed to allow gas to flow in one direction only. When the air spring 141 needs more gas to increase the height of the vehicle body or adjust the stiffness of the suspension, the control module 131 will instruct the air pump 21 to work and open the second one-way valve 28, thereby pumping outside air directly into the air spring 141. This arrangement allows the air spring to respond quickly to external commands and achieve rapid height adjustment or stiffness change.

[0086] The opening and closing of the two one-way valves are usually automatically managed by the control module 131, and are adjusted according to the air pressure information fed back by the sensor and the real-time needs of the vehicle. Through this design, the closed air suspension system can flexibly manage the gas flow and optimize the suspension performance while maintaining the stability and reliability of the system.

[0087] In one embodiment, the vehicle power supply 11 provides the necessary power support for the entire air suspension system to ensure the normal operation of each component of the system. The signal input module 12 is responsible for receiving signals from other vehicle systems, such as vehicle speed, acceleration, etc., and obtaining the status signal of the air supply module to provide data support for system control. The control module 131 of the air supply module 13 outputs control instructions after algorithm processing based on the signals received by the signal input module and the internal status signal. The mechanical module 132 of the air supply module 13: includes an air pump 21, multiple solenoid valves 22, a pressure limiting valve 23, a pressure sensor 24, a temperature sensor 25 and a drying, filtering, and noise reduction accessory 26. The air pump 21 is the "heart" of the system and is responsible for pumping air according to the instructions of the control module. The solenoid valve is used to control the air flow to each air spring or air tank. The pressure limiting valve 23 protects the system from damage due to excessive pressure. The pressure sensor 24 and the temperature sensor 25 monitor the system status in real time to ensure safe operation. The drying, filtering and noise reduction accessories 26 ensure that the air entering the system is clean and low-noise. The actuator 14 mainly includes an air spring 141 and an air tank 142. These components adjust the inflation or deflation according to the instructions of the control module to adjust the height and suspension stiffness of the vehicle. The specific process is as follows:

[0088] S1. Signal detection and input: The signal input module 12 continuously collects external signals and the status of the air supply module 13 itself. S2. Signal processing and decision-making: The control module 131 processes these signals to determine the adjustments that need to be made to the suspension system 1. S3. Execution of actions: The air pump 21 operates according to the control instructions and controls the flow of gas by adjusting the speed and direction of rotation. The solenoid valve 22 opens or closes as needed to control the flow of gas to a specific air spring 141 or air tank 142. The pressure limiting valve 23, pressure sensor 24 and temperature sensor 25 work together to ensure that the system operates at a safe pressure and temperature. The drying, filtering and noise reduction accessories 26 ensure air quality and reduce system noise. S4. System monitoring and adjustment: The control module 131 continuously monitors all sensor feedback and adjusts control instructions when necessary to adapt to changing driving conditions and driving needs.

[0089] In summary, the closed air suspension system described in this application achieves precise control of the air suspension system through a highly integrated control system, that is, the close integration of the control module and the mechanical module. The advanced control algorithm is used to automatically adjust the suspension system state according to real-time signals to improve driving comfort and safety. The multiple protections of the pressure limiting valve, pressure sensor and temperature sensor ensure the long-term stable operation of the system. The intake quality is ensured through drying, filtering and noise reduction accessories, which improves system efficiency and passenger comfort.

[0090] Based on this, the closed air suspension system in this embodiment provides an efficient and comfortable suspension solution for modern cars with its highly integrated and intelligent control strategy and safe and reliable protection mechanism. Through continuous signal monitoring, processing and execution, the system can adapt to different driving environments and needs and optimize the driving experience.

[0091] The present application also provides a vehicle, including the aforementioned closed air suspension system. The implementation of the closed air suspension system on the vehicle will bring about multiple beneficial effects:

[0092] 1. Improve driving comfort

[0093] Reduce vibration and noise: The closed air suspension system described in this application can more effectively absorb road bumps and vibrations by precisely controlling the air pressure of the air spring, thereby reducing noise and vibration inside the vehicle and providing a smoother riding experience; Adaptive height adjustment: The system can automatically adjust the vehicle's height and suspension stiffness according to different driving conditions and passenger needs to ensure optimal comfort and driving stability.

[0094] 2. Enhance vehicle performance

[0095] Improve handling stability: The closed air suspension system described in this application can optimize the center of gravity of the vehicle and the response of the suspension system by adjusting the state of the air spring, thereby improving handling stability and safety. Increase load capacity: The air spring of the system can automatically adjust the air pressure according to the load to maintain the balance of the vehicle body, thereby adapting to different load requirements, which is particularly important for commercial vehicles.

[0096] 3. Improve energy efficiency and environmental protection

[0097] Reduce energy consumption: The closed air suspension system described in this application reduces energy loss by optimizing the working state of the suspension system, thereby improving fuel efficiency, which has positive significance for reducing operating costs and protecting the environment. Reduce emissions: Due to the improvement of energy efficiency, the exhaust emissions of automobiles are correspondingly reduced, which helps to alleviate the problem of urban air pollution.

[0098] 4. Extend vehicle service life

[0099] Reduced maintenance requirements: Due to its high degree of automation and closed-loop control, the closed air suspension system described in this application has lower maintenance requirements than traditional suspension systems, reducing vehicle maintenance costs and time. Extended component life: The system extends the service life of the suspension system and other related components by reducing impact and wear on the suspension system.

[0100] 5. Improve safety

[0101] Coping with different road conditions: The closed air suspension system described in this application can quickly adjust according to the road conditions, whether it is a bumpy off-road environment or a flat highway, it can keep the vehicle stable and improve driving safety. Protection in emergency situations: In the event of an emergency, the system can immediately adjust the suspension hardness, provide more direct driving feedback, help the driver better control the vehicle and avoid accidents.

[0102] 6. Improve driving experience

[0103] Driving mode selection: The driver can choose different driving modes (such as comfort, sport, etc.) according to personal preferences or current road conditions. The closed air suspension system will adjust the suspension settings accordingly to meet different driving needs.

[0104] Intelligent interconnection function: Modern vehicles are increasingly focusing on intelligence. The closed air suspension system can be linked with other intelligent systems of the vehicle (such as navigation, weather forecast, etc.) to adjust the suspension settings in advance to cope with upcoming changes in road conditions.

[0105] In general, the application of the closed air suspension system of the present application can not only significantly improve the performance and ride comfort of the vehicle, but also show important value in improving energy efficiency, environmental protection and safety. The implementation of this technology has an important role in promoting the development of the modern automobile industry and is worthy of promotion and application on more vehicles.

[0106] The descriptions of the processes or structures corresponding to the above-mentioned figures have different emphases. For parts that are not described in detail in a certain process or structure, please refer to the relevant descriptions of other processes or structures.

[0107] The above embodiments are merely illustrative of the principles and effects of the present application and are not intended to limit the present application. Anyone familiar with the technology may modify or change the above embodiments without violating the spirit and scope of the present application. Therefore, all equivalent modifications or changes made by a person of ordinary skill in the art without departing from the spirit and technical ideas disclosed in the present application shall still be covered by the claims of the present application.

Claims

1. A closed air suspension system, characterized in that: The closed air suspension system includes: a vehicle power supply, a signal input module, an air supply module, and an actuator; The vehicle power supply is configured to supply power to the closed air suspension system; The signal input module is configured to receive an external signal and obtain a status signal of the gas supply module; The air supply module includes a control module and a mechanical module; the control module is configured to output a control signal according to the external signal and the state signal of the air supply module; the mechanical module includes an air pump, and the air pump operates based on the control signal; The actuator is connected to the air supply module, includes an air spring and an air storage tank, and is configured to perform inflation and deflation operations according to the control signal and the air pump.

2. The closed air suspension system according to claim 1, characterized in that: The mechanical module includes a preset number of air spring gas circuit solenoid valves, gas tank gas circuit solenoid valves, and exhaust gas circuit solenoid valves, which are configured to control the opening and closing of corresponding gas circuits.

3. The closed air suspension system according to claim 2, characterized in that: The air spring gas circuit solenoid valves are electrically connected to the control module respectively, and are configured to independently control the inflation and exhaust states of the corresponding air springs.

4. The closed air suspension system according to claim 2, characterized in that: The gas tank gas circuit solenoid valve is connected to the gas tank and is configured to automatically adjust the gas supply from the gas tank to the air spring based on the control signal.

5. The closed air suspension system according to claim 2, characterized in that: One end of the exhaust gas circuit solenoid valve is connected to the internal gas circuit pipeline of the air supply module, and the other end is connected to the atmosphere, and is configured to be activated when the air spring is exhausted.

6. The closed air suspension system according to claim 1, characterized in that: The mechanical module includes a pressure limiting valve, a pressure sensor and a temperature sensor, which are configured to monitor the internal air pressure of the system and the temperature status of the air pump in real time and realize over-pressure and over-temperature protection.

7. The closed air suspension system according to claim 1, characterized in that: The mechanical module also includes drying, filtering, and noise reduction accessories configured to process the air entering the system.

8. The closed air suspension system according to claim 1, characterized in that: The mechanical module includes a first one-way valve and a second one-way valve, one end of the one-way valve is connected to the atmosphere, and the other end is connected to the air pipeline of the air supply module. It is configured to replenish gas from the outside atmosphere to the system when the air pressure inside the air supply module is lower than the atmospheric pressure.

9. The closed air suspension system according to claim 8, characterized in that: The first one-way valve is arranged on one side of the air pump, and is unidirectionally conducted when the air tank needs to be replenished with air from the outside atmosphere, thereby replenishing the air tank; the second one-way valve is arranged on the other side of the air pump, and is unidirectionally conducted when the air spring needs to be inflated with air from the outside atmosphere, thereby replenishing the air spring.

10. A vehicle, characterized in that: The vehicle comprises a closed air suspension system as claimed in any one of claims 1 to 9.

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