Air suspension system and vehicle

Abstract

The utility model relates to the technical field of automobile air suspensions, and discloses an air suspension system and a vehicle, which comprise a mechanical module and an electronic central control module. The mechanical module comprises a valve body, an air path, an air supply unit, a pressure sensor and a drying chamber assembly, the air supply unit is connected with the valve body through the air path, and the valve body is provided with various valves and is connected with the filtering chamber assembly. The electronic central control module comprises a central control upper cover, a central control base, a central control PCBA circuit board and a switching electromagnetic valve coil. An electromagnetic valve driving circuit on the circuit board is used for controlling opening and closing of an electromagnetic valve. Air compressed and filtered by the air supply unit enters the valve body through the drying cavity assembly, and then the switching electromagnetic valve set is controlled by the electronic central control module to conduct air supply switching. The system is further provided with an inflation pump, an inflation motor, a plurality of sets of switching electromagnetic valves and an air electromagnetic valve which are used for controlling air supply and air exhaust of different air paths. According to the system, efficient and safe operation of the air suspension is achieved through air path design and electronic control.

Description

Technical Field

[0001] This utility model relates to the field of automotive air suspension technology, specifically to an air suspension system, and also to a vehicle using the air suspension system. Background Technology

[0002] Air suspension systems consist of key components such as air springs, electric pumps, or compressors. Their technology originates in the aviation industry and has since been applied to heavy vehicles such as trucks and buses, gaining popularity for its superior comfort and height adjustability. Air suspension automatically adjusts the suspension stiffness according to road conditions and driving needs, significantly improving the driving experience. For example, at high speeds, the system lowers the vehicle height to reduce air resistance while maintaining comfort; on bumpy roads, it effectively filters vibrations and noise, improving driving stability.

[0003] Despite the numerous advantages of air suspension systems, their high maintenance costs and relatively low durability have long limited their widespread adoption. In recent years, with the rapid development of the new energy vehicle market and continuous advancements in automotive technology, air suspension systems have gradually become standard equipment in high-performance and luxury models, and are increasingly penetrating into mid-to-low-end new energy vehicles, performing particularly well in heavy-duty and off-road scenarios.

[0004] However, existing air suspension systems still face numerous technical challenges. For example, some systems are structurally complex and have low integration, leading to difficulties in assembly and maintenance, and high costs. Meanwhile, some systems have slow response times and poor NVH (noise, vibration, and harshness) performance, affecting the driving experience and overall vehicle performance. Therefore, developing a compact, highly integrated, fast-responding air suspension system with excellent NVH performance has become a critical issue that the industry urgently needs to address. Utility Model Content

[0005] One objective of this invention is to provide an air suspension system that is compact, space-saving, easy to assemble and disassemble, and has superior performance, thereby solving the problems of high maintenance costs, insufficient durability, and slow response speed in existing air suspension systems.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] This utility model discloses an air suspension system, comprising:

[0008] The mechanical module includes a valve body, air passage, air supply unit, pressure sensor, and drying chamber assembly. The air passage is located inside the valve body, and the air supply unit is connected to the valve body via the air passage. The valve body is equipped with a switching solenoid valve assembly, a pressure stabilizing protection valve, and an anti-backflow limiting valve, all of which are connected to the air passage inside the valve body. The filter chamber assembly is connected to the air passage inside the valve body via inlet and outlet assemblies.

[0009] The electronic central control module includes a central control top cover and a central control base that cooperate to form the module shell, a central control PCBA circuit board that is fixedly installed in the inner cavity of the central control base, and a switching solenoid valve coil that is installed on the central control PCBA circuit board and electrically connected to the circuit board by wires.

[0010] The central control PCBA circuit board includes a solenoid valve drive circuit, which is used to send pulse control signals to the switching solenoid valve coil through wires to adjust the opening and closing state of the solenoid valve of the air suspension system.

[0011] The air supply unit compresses the air that has passed through the filter chamber assembly. The compressed air enters the air passage inside the valve body through the drying chamber assembly. After passing through the pressure stabilizing protection valve and the anti-backflow limiting valve, it enters the switching solenoid valve group. The electronic central control module controls the opening or closing of the switching solenoid valve group to switch the air supply.

[0012] In addition to the above-mentioned technical features, this utility model has also made optimizations and improvements in the following aspects:

[0013] As a preferred embodiment of the present invention, the air supply unit of the air suspension system includes an air pump and an air motor; the air pump is located inside the valve body, and the air motor is installed outside the valve body and connected to the air pump through a transmission assembly to provide compressed air to the air spring.

[0014] As a preferred embodiment of this utility model, the valve body includes two chambers for mounting an air pump; the air pump includes two connecting arms; the air motor includes an eccentric wheel mechanism; the connecting arms are connected to the motor shaft through the connecting arm mounting port; after the motor is powered on, the eccentric wheel mechanism converts the rotational motion into linear reciprocating motion to compress air.

[0015] As a preferred technical solution of this utility model, the drying chamber assembly includes one or more sub-cavities, each containing a desiccant, and the outer side of each sub-cavity is covered with a plastic shell. The side wall of the plastic shell is provided with two air inlets and outlets, which are sealed to the valve body by O-rings and fixed by dryer fixing bolts.

[0016] As a preferred technical solution of this utility model, the filter chamber assembly includes an air filter, an inlet and outlet pipe, a nozzle assembly, and an inlet and outlet port assembly. A one-way valve is provided at the connection between the inlet and outlet pipe and the valve body. The one-way valve is directly placed in the valve body cavity and is tightly fitted with the support base through a sealing gasket.

[0017] As a preferred embodiment of this utility model, the switching solenoid valve group includes multiple sets of switching solenoid valves and multiple sets of air solenoid valves; the multiple sets of switching solenoid valves are respectively switching solenoid valve No. 1, switching solenoid valve No. 2, switching solenoid valve No. 3, and switching solenoid valve No. 4; wherein, switching solenoid valve No. 1 is used to control the supply of compressed air to the air spring; switching solenoid valve No. 2 is used to control the compressed air discharged from the air spring to re-enter the air storage tank; switching solenoid valve No. 3 is used to control the compressed air output from the air storage tank to be compressed by the air pump and then supplied to the air spring; switching solenoid valve No. 4 is used to control the compressed air to be stored in the air storage tank or directly supplied; the multiple sets of air solenoid valves are respectively air solenoid valve No. 5, air solenoid valve No. 6, air solenoid valve No. 7, air solenoid valve No. 8, and exhaust solenoid valve No. 9; air solenoid valve No. 5, air solenoid valve No. 6, air solenoid valve No. 7, and air solenoid valve No. 8 respectively control the supply of air to different air springs or the reception of exhaust; exhaust solenoid valve No. 9 is used to discharge regeneration waste gas.

[0018] As a preferred technical solution of this utility model, the outlet of the drying chamber assembly is provided with an anti-backflow limiting valve to prevent high-pressure gas backflow, and to dehydrate the desiccant using high-pressure gas from the gas storage tank in the dryer regeneration mode.

[0019] As a preferred technical solution of this utility model, the air pump includes two air outlets, one of which is connected to a pressure stabilizing protection valve. When the pressure reaches a threshold, the pressure stabilizing protection valve opens, and the gas flows back to the air inlet of the air pump to achieve mechanical protection.

[0020] As a preferred embodiment of this invention, the pressure sensor is installed between the switching solenoid valve and the air solenoid valve to monitor the internal pressure of the air circuit.

[0021] As a preferred technical solution of this utility model, the motor plug of the air-filled motor is electrically connected by plugging in a conductive female terminal assembly or by soldering to the central control PCBA circuit board.

[0022] As a preferred technical solution of this utility model, the switching solenoid valve coil is pre-installed with the central control base through an interference fit, and is electrically connected to the central control PCBA circuit board by welding.

[0023] Another objective of this invention is to provide a vehicle that utilizes the aforementioned air suspension system.

[0024] Based on the above description of the technical content, the technical effects of this utility model's air suspension system are mainly reflected in the following aspects:

[0025] This utility model provides an air suspension system with reduced air suspension, the technical effects of which are mainly reflected in the following aspects:

[0026] 1. High integration and compact structure

[0027] High degree of integration: The air suspension system of this invention achieves a high degree of integration by combining mechanical modules and electronic central control modules. This design not only reduces the number of parts, but also significantly reduces the overall weight and volume of the system, making the installation space more compact and facilitating its placement within the limited space of a vehicle.

[0028] Compact structure: Key components in the mechanical module, such as the valve body, air circuit, air supply unit, pressure sensor, and drying chamber assembly, have been optimized to achieve a compact layout, improving the overall efficiency and reliability of the system.

[0029] 2. Highly efficient pneumatic path control and precise solenoid valve drive

[0030] High-efficiency air circuit control: The system connects the air supply unit to the valve body via an air circuit, and, together with components such as a switching solenoid valve group, a pressure stabilizing protection valve, and an anti-backflow limiting valve, achieves efficient control and precise regulation of compressed air. This design ensures the stability and comfort of the air suspension system under various driving conditions.

[0031] Precise solenoid valve actuation: The central control PCBA circuit board in the electronic central control module integrates a solenoid valve actuation circuit, which can send pulse control signals to the switching solenoid valve coil via wires to precisely adjust the opening and closing state of the solenoid valve. This design improves the system's response speed and control accuracy, enabling the air suspension system to quickly adjust the suspension state according to driving needs.

[0032] 3. Optimize drying and filtration functions

[0033] Highly efficient drying: The drying chamber assembly effectively removes moisture from the compressed air using a built-in desiccant, preventing corrosion and damage to system components. Simultaneously, the anti-backflow valve design prevents high-pressure gas backflow, and in dryer regeneration mode, high-pressure gas from the storage tank is used to dehydrate the desiccant, extending its service life.

[0034] Precise filtration: The filter chamber assembly, through components such as air filters and inlet / outlet pipes, effectively removes impurities and particulate matter from the air, ensuring the cleanliness of the compressed air. This design reduces wear and tear on system components and the failure rate, improving system reliability and lifespan.

[0035] 4. Multifunctional switching solenoid valve assembly and flexible gas supply modes

[0036] Multifunctional switching solenoid valve assembly: The switching solenoid valve assembly includes multiple switching solenoid valves and multiple air solenoid valves, enabling switching between various air supply modes. This design meets the suspension adjustment requirements under different driving conditions and driving needs, improving vehicle comfort and stability.

[0037] Flexible air supply modes: The system achieves multiple air supply modes by switching the control of the solenoid valve group, including supplying compressed air to the air springs, re-entering the air tank with compressed air discharged from the air springs, and supplying compressed air from the air tank to the air springs after being compressed by the air pump. This design allows the air suspension system to be flexibly adjusted according to the actual needs of the vehicle.

[0038] 5. Safe and reliable protection mechanism

[0039] Pressure stabilizing protection valve and backflow prevention valve: The design of the pressure stabilizing protection valve and backflow prevention valve effectively prevents the waste and backflow of high-pressure gas, protecting system components from damage. At the same time, these protection mechanisms also improve the reliability and safety of the system, ensuring the stable operation of the air suspension system under harsh conditions.

[0040] Pressure sensor monitoring: The pressure sensor can monitor the pressure changes inside the air circuit in real time. Once the pressure exceeds the set value, the system will automatically take measures to protect against damage or failure of components due to excessive pressure.

[0041] In summary, the air suspension system of this utility model achieves precise adjustment and efficient control of the vehicle suspension system through highly integrated design, efficient air circuit control and precise solenoid valve drive, optimized drying and filtering functions, multi-functional switching solenoid valve group and flexible air supply mode, as well as safe and reliable protection mechanism, which significantly improves the comfort and stability of the vehicle. Attached Figure Description

[0042] Figure 1 This is a schematic diagram of the mechanical module of this utility model;

[0043] Figure 2 This is a schematic diagram of the electronic central control module of this utility model;

[0044] Figure 3 This is a schematic diagram of the valve body of this utility model;

[0045] Figure 4 This is a schematic diagram of the pipeline of this utility model;

[0046] Figure 5 This is an exploded view of the mechanical module of this utility model;

[0047] Figure 6 This is an exploded view of the electronic central control module of this utility model;

[0048] Figure 7 This is a schematic diagram of the connecting arm of this utility model;

[0049] Figure 8 This is a schematic diagram of the motor of this utility model;

[0050] Figure 9 This is a schematic diagram of the dryer of this utility model;

[0051] Figure 10 This is an exploded view of the filter chamber of this utility model;

[0052] Figure 11 This is a schematic diagram of the one-way valve of this utility model;

[0053] Figure 12 This is a schematic diagram of the solenoid valve of this utility model;

[0054] Figure 13 This is a schematic diagram of the air inlet and outlet of the air pump of this utility model;

[0055] Figure 14 This is a schematic diagram of the gas path of this utility model.

[0056] In the diagram: 1. Mechanical module; 2. Electronic central control module; 3. Valve body; 4. Air circuit; 5. Steel ball; 6. Air pump; 6-1. Connecting arm; 6-1-2. Connecting arm mounting port; 6-2. Air outlet; 6-3. Air pump inlet; 7. Air pump motor; 7-1. Eccentric wheel mechanism; 7-2. Motor shaft; 7-4. Motor plug; 7-4-1. Pin; 7-5. Motor busbar; 8. Switching solenoid valve group; 8-1. Switching solenoid valve No. 1; 8-2. Switching solenoid valve No. 2; 8-3. Switching solenoid valve No. 3; 8-4. Switching solenoid valve No. 4; 8-5. Air solenoid valve No. 5; 8-6. Air solenoid valve No. 6; 8-7. Air solenoid valve No. 7; 8-8. Air solenoid valve No. 8; 8-9. Exhaust solenoid valve No. 9; 9. Pressure stabilization protection. 10. Anti-reverse flow limiting valve; 11. Filter chamber assembly; 11-1. Air filter; 11-2. Inlet and outlet pipes; 11-3. Nozzle assembly; 11-4. Inlet and outlet port assembly; 12. One-way valve; 12-1. Sealing gasket; 12-2. Support base; 13. Manual exhaust assembly; 14. Pressure sensor; 15. Drying chamber assembly; 15-1. Inner chamber; 15-2. Desiccant; 15-3. Plastic shell; 15-3-1. Inlet and outlet ports; 15-3-2. Screw through holes; 15-4. O-ring; 15-5. Dryer fixing bolts; 16. Central control cover; 17. Central control base; 18. Central control PCBA circuit board; 19. Switching solenoid valve coil; 20. Sealing ring; 21. Conductive female terminal assembly; 22. Grounding spring. Detailed Implementation

[0057] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0058] I. Explanation of descriptive terms used in this utility model

[0059] The embodiments provided in conjunction with the technical solutions of this utility model are intended to make the present utility model more thorough and complete, and to fully express the scope of the present utility model to those skilled in the art. It should be noted that unless otherwise specifically stated by the present utility model, the relative arrangement of components described in these embodiments should be interpreted as merely exemplary, and not as a limitation on the technical solutions of the present utility model.

[0060] In this utility model, the use of directional terms such as "upper," "lower," "left," "right," "bottom," and "top" is defined relative to the directions shown in the accompanying drawings and is used only to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly. These or other directional terms should not be construed as restrictive terms.

[0061] In this utility model, the terms "a," "an," "a kind," "the," and similar words used do not indicate quantity limitation and can represent singular or plural. The terms "comprising," "including," "having," and any variations thereof used in this utility model are intended to cover non-exclusive inclusion; the terms "first," "second," "third," etc., used in this utility model are merely to distinguish similar objects and do not represent a specific ordering of objects.

[0062] In this invention, when a specific device is described as being located between a first device and a second device, an intermediary device may or may not exist between the specific device and the first or second device. When a specific device is described as being connected to other devices, the specific device may be directly connected to the other devices without an intermediary device, or it may not be directly connected to the other devices but may have an intermediary device.

[0063] Furthermore, this utility model does not discuss in detail the technologies and equipment known to those skilled in the art, but where appropriate, such technologies and equipment should be considered part of the specification.

[0064] II. The core technical problem to be solved by the technical solution of this application

[0065] While existing air suspension systems are favored for their superior comfort and high adjustability, they still suffer from numerous technical shortcomings and challenges. On one hand, some systems have complex structural designs and low integration, which not only increases the difficulty of assembly and disassembly but also leads to high maintenance costs. Users often incur heavy repair costs and time when facing system failures. On the other hand, some air suspension systems have slow response times, failing to adapt quickly to changes in road conditions and driving demands, affecting ride smoothness and comfort. Furthermore, these systems have poor NVH (noise, vibration, and harshness) performance, generating significant noise and vibration during vehicle operation, severely reducing the driving experience and overall vehicle performance. Therefore, there is an urgent need to develop an air suspension system that is compact, highly integrated, has a fast response time, and excellent NVH performance to meet the market's demand for high-performance and comfortable vehicles.

[0066] III. Based on the above problems, this utility model provides a technical solution to solve the above problems. The technical solution, working principle and technical effect of this utility model are described in detail below with reference to specific embodiments.

[0067] To more clearly illustrate this application, the working principle of the air suspension is explained as follows:

[0068] Air suspension uses sensors to monitor changes in vehicle height in real time. The vehicle's computer uses these signals to precisely control the opening and closing of the air compressor and exhaust valves, thereby automatically compressing or extending the air springs and adjusting the car's ground clearance. This intelligent adjustment mechanism not only improves vehicle comfort and stability but also enhances its adaptability and handling under different road conditions.

[0069] At high speeds, the air suspension system stiffens the vehicle body to improve stability and reduce body roll and bumps. At low speeds or when driving for extended periods on uneven surfaces, it softens to absorb more vibrations and impacts, enhancing ride comfort and smoothness. Furthermore, with the increasing maturity and widespread adoption of autonomous driving technology, the stability and reliability of air suspension systems have become paramount, making their widespread application an inevitable trend.

[0070] like Figure 1 , Figure 2 , Figure 5 As shown, this embodiment provides an air suspension system, including a mechanical module 1 and an electronic central control module 2.

[0071] Among them, mechanical module 1 is responsible for air compression, filtration, drying and distribution, while electronic central control module 2 is responsible for system control and monitoring, ensuring that the air suspension system can be precisely adjusted according to different driving conditions and driving needs.

[0072] I. Mechanical Module Structure and Function

[0073] like Figure 3 , Figure 4 As shown, the valve body 3 has an internal air passage 4 for guiding the flow of compressed air. The valve body integrates a switching solenoid valve group 8, a pressure stabilizing protection valve 9, and an anti-backflow limiting valve 10. These valves are all connected to the internal air passage of the valve body to ensure precise control of airflow.

[0074] like Figure 5 , Figure 7 , Figure 8 As shown, the air supply unit includes an air pump 6 and an air pump motor 7. The air pump 6 is located inside the valve body 3 and includes two connecting arms 6-1. Each connecting arm has four vent holes at its head to allow low-pressure gas to flow into the pressurization chamber. The tail end has a connecting arm mounting port 6-1-2, which connects to the motor shaft 7-2 of the air pump motor 7. The air pump motor 7 converts rotary motion into linear reciprocating motion via an eccentric wheel mechanism 7-1, driving the air pump 6 to compress air.

[0075] like Figure 13As shown, the air pump 6 has two air outlets 6-2, one of which is connected to the pressure stabilizing valve 9. When the pressure at the air outlet reaches the set value, the pressure stabilizing valve 9 opens, and the gas flows back to the air inlet 6-3 of the air pump, thus realizing the mechanical protection function.

[0076] like Figure 1 , Figure 5 , Figure 9 As shown, the drying chamber assembly 15 includes one or more sub-cavities 15-1, each containing a desiccant 15-2. A plastic outer shell 15-3 covers the outer side of each sub-cavity, and two air inlets / outlets 15-3-1 are provided on the side wall. These are sealed to the valve body via O-rings 15-4 and secured with dryer fixing bolts 15-5 to ensure the drying of the compressed air.

[0077] like Figure 10 , Figure 11 As shown, the filter chamber assembly 11 includes an air filter 11-1, an inlet / outlet pipe 11-2, a nozzle assembly 11-3, and an inlet / outlet port assembly 11-4. A one-way valve 12 is provided at the connection between the inlet / outlet pipe 11-2 and the valve body 3. The one-way valve 12 is press-fitted with the support base 12-2 through a sealing gasket 12-1 to ensure unidirectional airflow.

[0078] like Figure 1 , Figure 5 As shown, pressure sensor 14 is installed between switching solenoid valve 8-1 to switching solenoid valve 8-4 and air solenoid valve 8-5 to air solenoid valve 8-8 to monitor the pressure changes inside the air circuit in real time.

[0079] The manual venting assembly 13 allows users to manually vent gases from the system when needed, facilitating system maintenance and commissioning.

[0080] Based on the above description, the specific working principle of the mechanical module in this application is as follows:

[0081] Air supply and compression: The air supply unit consists of an air pump 6 and an air motor 7. After the air motor is powered on, it drives the air pump to work through the transmission components (such as the eccentric wheel mechanism 7-1 and the connecting arm 6-1), which draws in and compresses the outside air.

[0082] The compressed air first enters the filter chamber assembly 11, where it passes through the air filter 11-1 to remove impurities and particulate matter.

[0083] Gas drying: Filtered compressed air enters the drying chamber assembly 15, where the desiccant 15-2 in the inner chamber 15-1 absorbs moisture from the air, ensuring the compressed air is dry.

[0084] The dried compressed air enters the air passage 4 inside the valve body 3 through the air inlet / outlet 15-3-1 of the plastic housing 15-3.

[0085] Gas distribution and pressure regulation: Compressed air flows in the air passage inside the valve body and is distributed to different air springs by the control of the switching solenoid valve group 8. The switching solenoid valve group includes multiple solenoid valves, such as the first switching solenoid valve 8-1 for supplying air to the air springs, and the second switching solenoid valve 8-2 for reintroducing the air discharged from the air springs into the air tank, etc.

[0086] The pressure regulating protection valve 9 is used to monitor the pressure in the gas circuit. When the pressure exceeds the set value, it will automatically open to release some gas and protect the system from excessive pressure.

[0087] The anti-backflow limiting valve 10 prevents high-pressure gas from flowing back and ensures unidirectional airflow.

[0088] Pressure monitoring and manual exhaust: Pressure sensor 14 monitors the pressure changes inside the air passage in real time and transmits the signal to the electronic central control module for precise control.

[0089] The manual venting assembly 13 allows users to manually vent gases from the system when needed, facilitating system maintenance and commissioning.

[0090] II. Structure and Functions of the Electronic Central Control Module

[0091] like Figure 6 As shown, the electronic central control module includes a central control cover 16 and a central control base 17, which together form the module housing. The central control PCBA circuit board 18 is fixedly installed in the inner cavity of the central control base and is the core control component of the system.

[0092] The central control PCBA circuit board 18 includes a solenoid valve drive circuit, which sends pulse control signals to the switching solenoid valve coil 19 through wires to precisely adjust the opening and closing state of the solenoid valve.

[0093] like Figure 5 , Figure 12 , Figure 14 As shown, the switching solenoid valve group 8 includes multiple sets of switching solenoid valves and multiple sets of air solenoid valves, which are used to control the flow direction and supply mode of compressed air, respectively. For example:

[0094] The No. 1 switching solenoid valve 8-1 is used to control the supply of compressed air to the air spring.

[0095] The second switching solenoid valve 8-2 is used to control the re-entry of compressed air discharged from the air spring into the air tank.

[0096] The No. 3 switching solenoid valve 8-3 is used to control the compressed air output from the air tank to be compressed by the air pump and then supplied to the air spring.

[0097] The No. 4 switching solenoid valve 8-4 is used to control the storage of compressed air in the air tank or to supply air directly.

[0098] Air solenoid valves 8-5 (No. 5) to 8-8 (No. 8) control the supply of air to different air springs or the reception of exhaust air.

[0099] The No. 9 exhaust solenoid valve 8-9 is used to discharge regeneration waste gas.

[0100] like Figure 6 , Figure 8 As shown, the motor plug 7-4 of the inflatable motor 7 is electrically connected by plugging into the conductive female terminal assembly 21 or by soldering to the central control PCBA circuit board 18.

[0101] The switching solenoid valve coil 19 is pre-installed with the central control base 17 via an interference fit and is electrically connected to the central control PCBA circuit board 18 by soldering. The grounding spring 22 ensures the electrical safety of the system.

[0102] Based on the above description, the specific working principle of the electronic central control module in this application is as follows:

[0103] Signal processing and control: The central control PCBA circuit board 18 of the electronic central control module is the core control component of the system, which includes key circuits such as the solenoid valve drive circuit.

[0104] The central control PCBA circuit board receives signals from sensors such as pressure sensor 14, processes them according to a preset control algorithm, and generates corresponding control signals.

[0105] Solenoid valve drive: The switching solenoid valve coil 19 receives pulse control signals from the central control PCBA circuit board and achieves the switching of the opening and closing state of the solenoid valve through the action of electromagnetic force.

[0106] By controlling the opening and closing of different solenoid valves, the electronic central control module can achieve precise control of the compressed air flow direction, thereby meeting the suspension adjustment requirements under different driving conditions and driving needs.

[0107] Electrical connection and grounding: The motor plug 7-4 of the pneumatic motor 7 is electrically connected by plugging into the conductive female terminal assembly 21 or by soldering to the central control PCBA circuit board 18 to ensure the normal operation of the motor.

[0108] The switching solenoid valve coil 19 is pre-installed with the central control base 17 through an interference fit, and is electrically connected to the central control PCBA circuit board 18 by soldering to achieve reliable signal transmission.

[0109] The grounding spring 22 ensures the electrical safety of the system and prevents electrostatic interference and leakage.

[0110] III. Overall System Workflow

[0111] 1. System startup and initialization

[0112] The electronic central control module (including the central control cover, central control base and central control PCBA circuit board) is powered on and starts to perform internal circuit self-test and initialization settings.

[0113] The air pump and air motor of the mechanical module are in standby mode, waiting for control signals.

[0114] Pressure sensors and other sensors begin to monitor changes in internal pressure of the gas path in real time and transmit the data to the electronic central control module.

[0115] 2. Air supply and compression

[0116] The electronic central control module sends a start signal to the air motor according to driving needs or preset conditions.

[0117] The air pump is driven by the air motor through transmission components such as the eccentric wheel mechanism, which draws in and compresses outside air.

[0118] The compressed air enters the filter chamber assembly and passes through the air filter to remove impurities and particulate matter.

[0119] 3. Gas drying and purification

[0120] Filtered compressed air enters the drying chamber assembly, where a desiccant absorbs moisture from the air, ensuring the compressed air remains dry.

[0121] The dried compressed air enters the air passage inside the valve body through the air inlet and outlet ports of the plastic casing.

[0122] 4. Gas distribution and pressure regulation

[0123] Compressed air flows in the air passage inside the valve body, and the electronic central control module sends control signals to the switching solenoid valve group according to driving conditions and suspension adjustment requirements.

[0124] The switching solenoid valve assembly controls the flow of compressed air based on the received control signal. For example, the first switching solenoid valve is used to supply air to the air spring, and the second switching solenoid valve is used to reintroduce the air discharged from the air spring into the air tank.

[0125] The pressure regulating protection valve monitors the pressure in the gas circuit. When the pressure exceeds the set value, it automatically opens to release some gas and protect the system from the effects of excessive pressure.

[0126] The anti-backflow limiting valve prevents high-pressure gas from flowing back and ensures unidirectional airflow.

[0127] 5. Pressure monitoring and feedback control

[0128] The pressure sensor monitors the pressure changes inside the gas path in real time and transmits the signal to the electronic central control module.

[0129] The electronic central control module adjusts the control signal of the solenoid valve group based on the feedback signal from the pressure sensor to achieve precise adjustment of the suspension system.

[0130] 6. Manual exhaust and system maintenance

[0131] When needed, users can manually vent the gas in the system using the manual venting assembly, which facilitates system maintenance and debugging.

[0132] The electronic central control module monitors the status of the manual exhaust components to ensure the normal operation of the system.

[0133] 7. System shutdown and standby

[0134] When the vehicle is turned off or the suspension system no longer needs adjustment, the electronic central control module sends a shut-off signal to the air motor and the switching solenoid valve group.

[0135] The air motor stops working, the switching solenoid valve group closes, and the system enters standby mode.

[0136] In summary, the air suspension system achieves precise adjustment and control of the suspension system through the coordinated work of mechanical and electronic central control modules. The system can adaptively adjust according to driving conditions and needs, improving vehicle stability and ride comfort.

[0137] IV. Application Examples

[0138] This utility model also describes a vehicle that utilizes the aforementioned air suspension system. By integrating this air suspension system, the vehicle achieves precise adjustment and control of the suspension system, enabling adaptive adjustments based on driving conditions and needs, thereby improving vehicle stability and ride comfort.

[0139] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

[0140] Furthermore, the technical solutions of the various embodiments can be combined with each other, but only if they are feasible for those skilled in the art. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

Claims

1. An air suspension system characterized by, The mechanical module (1) and the electronic central control module (2) are included. The mechanical module (1) comprises: The valve body (3) is internally provided with an air path (4); The air supply unit is connected with the valve body (3) through the air path (4); The switching electromagnetic valve group (8) and the pressure stabilizing protection valve (9) are arranged on the valve body (3) and are communicated with the air path (4); The filter chamber assembly (11) is connected with the air path (4) through the air inlet and outlet port assembly; The pressure sensor (14) and the drying chamber assembly (15) are used for monitoring and drying compressed air; the drying chamber assembly (15) comprises one or more sub-chambers (15-1), the sub-chamber (15-1) is internally provided with a drying agent (15-2), the sub-chamber is externally provided with a plastic shell (15-3), and the side wall of the plastic shell (15-3) is provided with two air inlet and outlet ports (15-3-1); The electronic central control module (2) comprises: The module shell is composed of a central control upper cover (16) and a central control base (17); The central control PCBA circuit board (18) is fixedly arranged in the sub-chamber of the central control base (17); The switching electromagnetic valve coil (19) is arranged on the central control PCBA circuit board (18) and is electrically connected with the circuit board through a wire; The central control PCBA circuit board (18) comprises an electromagnetic valve driving circuit, which is used for sending a pulse control signal to the switching electromagnetic valve coil (19) through the wire to adjust the opening and closing state of the switching electromagnetic valve group (8); The air supply unit compresses the air passing through the filter chamber assembly (11), the compressed air enters the air path (4) in the valve body and the switching electromagnetic valve group (8) through the drying chamber assembly (15), and the opening and closing of the switching electromagnetic valve group (8) is controlled by the electronic central control module (2), so that the air supply switching is realized.

2. The air suspension system of claim 1, wherein: The air supply unit comprises an air charging pump (6) and an air charging motor (7); the air charging pump (6) is arranged in the valve body (3), the air charging motor (7) is arranged outside the valve body (3) and is connected with the air charging pump (6) through a transmission assembly, and compressed air is provided for the air spring.

3. The air suspension system of claim 2, wherein: The valve body (3) comprises two chambers for mounting the air charging pump (6); the air charging pump (6) comprises two connecting arms (6-1), the air charging motor (7) comprises an eccentric wheel mechanism (7-1), the connecting arm (6-1) is connected with the motor shaft (7-2) through a connecting arm mounting port (6-1-2), and the motor converts the rotary motion into linear reciprocating motion through the eccentric wheel mechanism (7-1) to compress air after being electrified.

4. The air suspension system of claim 1, wherein: The filter chamber assembly (11) comprises an air filter (11-1), an air inlet and outlet pipe (11-2), a plug assembly (11-3), and an air inlet and outlet port assembly (11-4); the air inlet and outlet pipe (11-2) is provided with a one-way valve (12) at the connection position of the valve body (3); the one-way valve (12) is directly arranged in the chamber of the valve body (3) and is tightly matched with the supporting base (12-2) through a sealing gasket (12-1).

5. The air suspension system of claim 1, wherein: The switching electromagnetic valve group (8) comprises a plurality of switching electromagnetic valves and a plurality of air electromagnetic valves; The plurality of switching electromagnetic valves are respectively: No. 1 switching electromagnetic valve (8-1) for controlling compressed air supply to air spring; No. 2 switching electromagnetic valve (8-2) for controlling compressed air discharged from air spring to re-enter air tank; No. 3 switching electromagnetic valve (8-3) for controlling compressed air output from air tank to air spring after being compressed by inflation pump (6); No. 4 switching electromagnetic valve (8-4) for controlling compressed air storage or direct supply to air tank; The plurality of air electromagnetic valves are respectively: No. 5 air electromagnetic valve (8-5), No. 6 air electromagnetic valve (8-6), No. 7 air electromagnetic valve (8-7), and No. 8 air electromagnetic valve (8-8) for controlling air supply or exhaust to different air springs; No. 9 exhaust electromagnetic valve (8-9) for discharging regeneration exhaust gas.

6. The air suspension system of claim 1, wherein: The dry chamber assembly (15) is provided with an anti-reverse flow valve (10) at the outlet for preventing high-pressure gas backflow and dehydrating the desiccant (15-2) using high-pressure gas from the air tank in the dryer regeneration mode.

7. The air suspension system of claim 2, wherein: The inflation pump (6) includes two gas outlets (6-2), one of which is connected with a pressure stabilizing protection valve (9) that opens when the pressure reaches a threshold value, and the gas flows back to the inflation pump inlet (6-3) to achieve mechanical protection.

8. The air suspension system of claim 1, wherein: The pressure sensor (14) is installed between the switching electromagnetic valve and the air electromagnetic valve for monitoring the internal pressure of the gas circuit.

9. The air suspension system of claim 3, wherein: The motor plug (7-4) of the inflation motor (7) is connected to the central control PCBA circuit board (18) through the conductive female terminal assembly (21) or is welded to the central control PCBA circuit board (18) to achieve electrical connection.

10. The air suspension system of claim 1, wherein: The switching electromagnetic valve coil (19) is pre-installed in the central control base (17) by interference fit and is electrically connected to the central control PCBA circuit board (18) by welding.

11. A vehicle characterized by comprising: The air suspension system according to any one of claims 1-10. The air suspension system according to any one of claims 1-10.

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