Air suspension system and vehicle

Abstract

The invention relates to the technical field of automobile air suspensions, and discloses an air suspension system and a vehicle, and the air suspension system comprises 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] The present invention relates to the technical field of automobile air suspension, in particular to an air suspension system, and also to a vehicle using the air suspension system. Background Art

[0002] The air suspension system consists of key components such as air springs, electric pumps or compressors. Its technical origins can be traced back to the aviation field, and then gradually applied to heavy vehicles such as trucks and buses. It is favored for its excellent comfort and height adjustability. The air suspension can automatically adjust the hardness of the suspension according to the road conditions and driving needs, significantly improving the driving experience. For example, when driving at high speeds, the system can lower the height of the vehicle to reduce air resistance while maintaining comfort; on bumpy roads, it can effectively filter vibration and noise to improve driving stability.

[0003] Although the air suspension system has many advantages, its high maintenance cost and relatively insufficient durability have always restricted its widespread application. In recent years, with the rapid development of the new energy vehicle market and the continuous advancement of automobile technology, the air suspension system has gradually become a standard configuration for high-performance and luxury models, and has gradually penetrated into low- and medium-configuration new energy models, especially in heavy-load and off-road scenarios.

[0004] However, existing air suspension systems still face many technical challenges. For example, some systems have complex structures and low integration, which makes assembly and maintenance difficult and the cost remains high. At the same time, some systems have slow response speeds and poor NVH (noise, vibration and harshness) performance, which affects the driving experience and overall vehicle performance. Therefore, developing an air suspension system with a compact structure, high integration, fast response speed and excellent NVH performance has become a key issue that the industry needs to solve urgently. Summary of the invention

[0005] One object of the present invention is to provide an air suspension system with compact structure, space saving, simple assembly and disassembly and excellent performance, so as to solve the problems of high maintenance cost, insufficient durability and slow response speed existing in the existing air suspension system.

[0006] To achieve the above object, the present invention provides the following technical solutions: The present invention provides an air suspension system, comprising: The mechanical module includes a valve body, an air circuit, an air supply unit, a pressure sensor and a drying chamber assembly. The air circuit is arranged inside the valve body, and the air supply unit is connected to the valve body through the air circuit. The valve body is provided with a switching solenoid valve group, a pressure stabilizing protection valve and an anti-reverse flow limiting valve, and all of them are connected to the air circuit inside the valve body. The filter chamber assembly is connected to the air circuit inside the valve body through the air inlet and outlet assembly.

[0007] The electronic central control module includes a central control upper cover and a central control base that cooperate with each other to form a module housing, a central control PCBA circuit board fixedly arranged in the inner cavity of the central control base, and a switching solenoid valve coil arranged on the central control PCBA circuit board and electrically connected to the circuit board through a wire.

[0008] The central control PCBA circuit board includes a solenoid valve drive circuit for sending a pulse control signal to the switching solenoid valve coil through a wire to adjust the opening and closing state of the solenoid valve of the air suspension system.

[0009] The air supply unit compresses the air passing through the filter chamber assembly. The compressed air enters the gas path inside the valve body through the drying chamber assembly, passes through the pressure stabilizing protection valve and the anti-reverse current limiting valve, and then enters the switching solenoid valve group. The electronic central control module controls the opening or closing of the switching solenoid valve group to perform air supply switching.

[0010] In addition to the above technical features, the present invention has also been optimized and improved in the following aspects: As a preferred technical solution of the present invention, the air supply unit of the air suspension system includes an air inflation pump and an air inflation motor; the air inflation pump is arranged inside the valve body, and the air inflation motor is installed outside the valve body and is connected to the air inflation pump through a transmission component to provide compressed air for the air spring.

[0011] As a preferred technical solution of the present invention, the valve body includes two chambers for installing the air inflation pump; the air inflation pump includes two connecting arms, and the air inflation motor includes an eccentric wheel mechanism. The connecting arms are connected to the motor shaft through the connecting arm mounting ports. After the motor is powered on, the eccentric wheel mechanism converts the rotational motion into a linear reciprocating motion to compress the air.

[0012] As a preferred technical solution of the present invention, the drying chamber assembly includes one or more sub-inner cavities. The sub-inner cavities are filled with desiccant inside, and a plastic outer shell is sleeved outside the sub-inner cavities. Two air inlet and outlet ports are provided on the side wall of the plastic outer shell, which are hermetically connected to the valve body through O-rings and fixed by dryer fixing bolts.

[0013] As a preferred technical solution of the present invention, the filter chamber assembly includes an air filter, an inlet and outlet pipe, an insertion component, and an air inlet and outlet port component. A one-way valve is arranged 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 in interference fit with the support base through a gasket.

[0014] As a preferred technical solution of the present invention, the switching solenoid valve group includes multiple groups of switching solenoid valves and multiple groups of air solenoid valves; the multiple groups of switching solenoid valves are respectively the first switching solenoid valve, the second switching solenoid valve, the third switching solenoid valve, and the fourth switching solenoid valve; among them, the first switching solenoid valve is used to control the supply of compressed air to the air spring; the second switching solenoid valve is used to control the compressed air discharged from the air spring to re-enter the air storage tank; the third switching solenoid valve is used to control the compressed air output from the air storage tank to be supplied to the air spring after being compressed by the air inflation pump; the fourth switching solenoid valve is used to control the storage or direct supply of compressed air to the air storage tank; the multiple groups of air solenoid valves are respectively the fifth air solenoid valve, the sixth air solenoid valve, the seventh air solenoid valve, the eighth air solenoid valve, and the ninth exhaust solenoid valve; the fifth air solenoid valve, the sixth air solenoid valve, the seventh air solenoid valve, and the eighth air solenoid valve respectively control the supply of air to different air springs or receive exhaust air; the ninth exhaust solenoid valve is used to discharge the regenerated waste gas.

[0015] As a preferred technical solution of the present invention, an anti-backflow current-limiting valve is provided at the outlet of the drying chamber assembly to prevent the backflow of high-pressure gas and dehydrate the desiccant using the high-pressure gas in the air storage tank in the regeneration mode of the dryer.

[0016] As a preferred technical solution of the present invention, the air inflation pump includes two air outlets, one of which is connected to the voltage stabilization protection valve. When the pressure reaches the threshold value, the voltage stabilization protection valve opens, and the gas flows back to the air inlet of the air inflation pump to achieve mechanical protection.

[0017] As a preferred technical solution of the present invention, the pressure sensor is installed between the switching solenoid valve and the air solenoid valve to monitor the internal pressure of the gas circuit.

[0018] As a preferred technical solution of the present invention, the motor plug of the air inflation motor is electrically connected by plugging into or welding with the central control PCBA circuit board through the conductive mother terminal assembly.

[0019] As a preferred technical solution of the present invention, the switching solenoid valve coil is pre-installed with an interference fit on the central control base and is electrically connected to the central control PCBA circuit board by welding.

[0020] Another object of the present invention is to provide a vehicle that applies the above air suspension system.

[0021] Combined with the description of the above technical content, the technical effects of an air suspension system of the present invention are mainly reflected in the following aspects: The present invention provides an air suspension system, and its technical effects are mainly reflected in the following aspects: 1. High degree of integration and structural compactness High degree of integration: The air suspension system of the present invention realizes a highly integrated design by integrating mechanical modules and electronic central control modules. This design not only reduces the number of components, but also significantly reduces the overall weight and volume of the system, making the installation space more compact and facilitating layout in the limited space of the vehicle.

[0022] Compact structure: Key components such as valve bodies, air circuits, air supply units, pressure sensors, and drying chamber assemblies in the mechanical module achieve a compact layout through optimized design, improving the overall efficiency and reliability of the system.

[0023] 2. Efficient air circuit control and precise solenoid valve drive Efficient air circuit control: The system connects the air supply unit to the inside of the valve body through an air circuit, and combines components such as a switching solenoid valve group, a pressure stabilizing protection valve, and an anti-backflow current-limiting valve to achieve efficient control and precise regulation of compressed air. This design ensures the stability and comfort of the air suspension system under different driving conditions.

[0024] Precise solenoid valve drive: The central control PCBA circuit board in the electronic central control module integrates a solenoid valve drive circuit, which can send pulse control signals to the switching solenoid valve coil through wires to precisely adjust the opening and closing state of the solenoid valve. This design improves the response speed and control accuracy of the system, enabling the air suspension system to quickly adjust the suspension state according to driving requirements.

[0025] 3. Optimized drying and filtering functions Efficient drying treatment: The drying chamber assembly effectively removes moisture in the compressed air through the built-in desiccant, preventing corrosion and damage to system components caused by moisture. At the same time, the design of the anti-backflow current-limiting valve prevents the backflow of high-pressure gas and uses the high-pressure gas in the air storage tank to dehydrate the desiccant in the dryer regeneration mode, extending the service life of the desiccant.

[0026] Fine filtering function: The filtering chamber assembly effectively removes impurities and particulate matter in the air through components such as air filters and inlet and outlet pipes, ensuring the cleanliness of the compressed air. This design reduces component wear and failure rates in the system, improving the reliability and service life of the system.

[0027] 4. Multifunctional switching solenoid valve group and flexible air supply mode Multifunctional switching solenoid valve group: The switching solenoid valve group includes multiple groups of switching solenoids and multiple groups of air solenoids, which can realize the switching of multiple air supply modes. This design meets the suspension adjustment requirements under different driving conditions and driving needs, improving the comfort and stability of the vehicle.

[0028] Flexible air supply mode: By switching the control of the solenoid valve group, the system realizes various air supply modes, such as supplying compressed air from the air compressor to the air spring, re-entering the compressed air discharged from the air spring into the air storage tank, and supplying compressed air from the air storage tank to the air spring after being compressed by the air charging pump. This design enables the air suspension system to be flexibly adjusted according to the actual needs of the vehicle.

[0029] 5. Safe and reliable protection mechanism Voltage stabilizing protection valve and anti-reverse current limiting valve: The design of the voltage stabilizing protection valve and the anti-reverse current limiting valve effectively prevents the waste and backflow of high-pressure gas, protecting the 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 working conditions.

[0030] 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 for protection to prevent component damage or failure caused by excessive pressure.

[0031] In summary, through technical means such as 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, and safe and reliable protection mechanism, the air suspension system of the present invention realizes precise adjustment and efficient control of the vehicle suspension system, significantly improving the comfort and stability of the vehicle. Brief description of the drawings

[0032] Figure 1 is a schematic diagram of the mechanical module of the present invention; Figure 2 is a schematic diagram of the electronic central control module of the present invention; Figure 3 is a schematic diagram of the valve body of the present invention; Figure 4 is a schematic diagram of the pipeline of the present invention; Figure 5 is an exploded schematic diagram of the mechanical module of the present invention; Figure 6 is an exploded schematic diagram of the electronic central control module of the present invention; Figure 7 is a schematic diagram of the connecting arm of the present invention; Figure 8 is a schematic diagram of the motor of the present invention; Figure 9 is a schematic diagram of the dryer of the present invention; Figure 10 is an exploded schematic diagram of the filter chamber of the present invention; Figure 11 is a schematic diagram of the check valve of the present invention; Figure 12 It is a schematic diagram of the solenoid valve of the present invention; Figure 13 It is a schematic diagram of the air inlet and outlet of the air pump of the present invention; Figure 14 It is a schematic diagram of the air circuit principle of the present invention.

[0033] In the figure: 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 air inlet; 7. Inflation 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. No. 1 switching solenoid valve; 8-2. No. 2 switching solenoid valve; 8-3. No. 3 switching solenoid valve; 8-4. No. 4 switching solenoid valve; 8-5. No. 5 air solenoid valve; 8-6. No. 6 air solenoid valve; 8-7. No. 7 air solenoid valve; 8-8. No. 8 air solenoid valve; 8-9. No. 9 exhaust solenoid valve; 9. Voltage stabilizing protection valve; 10. Anti-reverse current limiting valve; 11. Filter chamber assembly; 11-1. Air filter; 11-2. Inlet and outlet pipe; 11-3. Insertion component; 11-4. Air inlet and outlet component; 12. Check valve; 12-1. Sealing gasket; 12-2. Support base; 13. Manual exhaust component; 14. Pressure sensor; 15. Dry chamber assembly; 15-1. Sub-inner cavity; 15-2. Desiccant; 15-3. Plastic shell; 15-3-1. Air inlet and outlet; 15-3-2. Screw through hole; 15-4. O-ring; 15-5. Dryer fixing bolt; 16. Central control upper cover; 17. Central control base; 18. Central control PCBA circuit board; 19. Switching solenoid valve coil; 20. Sealing ring; 21. Conductive mother terminal component; 22. Grounding spring. Detailed implementation manners

[0034] The following describes the preferred embodiments of the present invention with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention and are not used to limit the present invention.

[0035] I. Explanation of descriptive terms in the present invention The embodiments given in combination with the technical solutions of the present invention are to make the present invention more thorough and complete, and to fully express the scope of the present invention to those skilled in the art. It should be noted that: unless specifically stated otherwise in the present invention, the relative arrangements of the components described in these embodiments should be construed as merely exemplary and not as a limitation of the technical solutions of the present invention.

[0036] In the present invention, if directional terms such as "upper", "lower", "left", "right", "bottom", "top", etc. are involved, they are defined relative to the directions in the respective drawings and are only used to represent relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship may also change accordingly. These or other directional terms should not be construed as restrictive terms.

[0037] In the present invention, similar terms such as "a", "an", "one kind", "the", etc. do not indicate a quantity limitation and may represent singular or plural. The terms "comprising", "including", "having" and any variations thereof involved in the present invention are intended to cover non-exclusive inclusion; if the present invention involves terms such as "first", "second", "third", etc., they are only used to distinguish similar objects and do not represent a specific order for the objects.

[0038] In the present invention, when it is described that a specific device is located between a first device and a second device, there may or may not be an intermediate device between the specific device and the first device or the second device. When it is described that a specific device is connected to other devices, the specific device may be directly connected to the other devices without an intermediate device, or may not be directly connected to the other devices but have an intermediate device.

[0039] In addition, the present invention does not discuss in detail the technologies and devices known to those of ordinary skill in the relevant art, but in appropriate cases, the said technologies and devices should be regarded as part of the specification.

[0040] II. The core technical problem to be solved by the technical solution of the present application Although existing air suspension systems are favored for their excellent comfort and height adjustability, there are still many technical defects and challenges. On the one hand, the structural designs of some systems are complex and the integration level is low, which not only increases the difficulty of assembly and disassembly, but also results in high maintenance costs. When users face system failures, they often have to bear heavy maintenance costs and time costs. On the other hand, the response speed of some air suspension systems is slow and they cannot quickly adapt to changes in driving road conditions and driving demands, affecting the smoothness and comfort of driving. At the same time, the NVH (noise, vibration, and harshness) performance of these systems is not good, and the noise and vibration generated by the vehicle during driving are large, seriously reducing the driving experience and the overall performance of the vehicle. Therefore, there is an urgent need to develop an air suspension system with a compact structure, high integration level, fast response speed, and excellent NVH performance to meet the market demand for high-performance and comfortable vehicles.

[0041] III. Based on the above problems, the present invention specifically provides a technical solution to solve the above problems. The technical solution, working principle, and technical effects of the present invention will be described in detail below with specific embodiments.

[0042] To illustrate the present application more clearly, the working principle of the air suspension is described as follows: The air suspension monitors the change in vehicle body height in real time through sensors. The vehicle computer precisely controls the opening and closing of the air compressor and exhaust valves based on these signals, thereby achieving the automatic compression or elongation of the air springs, and further adjusting the ground clearance of the vehicle. This intelligent adjustment mechanism not only improves the comfort and stability of the vehicle, but also enhances its adaptability and maneuverability under different road conditions.

[0043] When driving at high speed, the air suspension system makes the vehicle body harder, thereby improving the stability of the vehicle body, reducing roll and bumps; while when driving at low speed or driving on uneven roads for a long time, it becomes softer to absorb more vibrations and shocks, enhancing the comfort and smoothness of driving. In addition, with the gradual maturity and popularization of autonomous driving technology, the stability and reliability of the air suspension system have become particularly important, and its popular application has become an irresistible trend.

[0044] As Figure 1 、 Figure 2 、 Figure 5 shown, this embodiment provides an air suspension system, including a mechanical module 1 and an electronic central control module 2.

[0045] Among them, the mechanical module 1 is responsible for the compression, filtration, drying and distribution of air, while the electronic central control module 2 is responsible for the control and monitoring of the system, ensuring that the air suspension system can be precisely adjusted according to different driving conditions and driving requirements.

[0046] I. Structure and Function of the Mechanical Module As Figure 3 、 Figure 4 shown, an air passage 4 is provided inside the valve body 3 for guiding the flow of compressed air. A switching solenoid valve group 8, a pressure stabilizing protection valve 9 and an anti-reverse current limiting valve 10 are integrated on the valve body, and these valves are all connected to the air passage inside the valve body to ensure precise control of the air flow.

[0047] As Figure 5 、 Figure 7 、 Figure 8 shown, the air supply unit includes an air inflation pump 6 and an air inflation motor 7. The air inflation pump 6 is arranged inside the valve body 3 and includes two connecting arms 6-1. Four ventilation holes are opened at the head of each connecting arm to allow low-pressure gas to enter the pressurized chamber; a connecting arm mounting port 6-1-2 is provided at the tail, which is connected to the motor shaft 7-2 of the air inflation motor 7. The air inflation motor 7 converts the rotary motion into a linear reciprocating motion through an eccentric wheel mechanism 7-1 to drive the air inflation pump 6 to compress air.

[0048] As Figure 13As shown, the air pump 6 is provided with two air outlets 6-2, one of which is connected to the pressure stabilizing and protecting valve 9. When the pressure at the air outlet reaches the set value, the pressure stabilizing and protecting valve 9 opens, and the gas flows back to the air inlet 6-3 of the air pump, realizing the mechanical protection function.

[0049] As Figure 1 , Figure 5 , Figure 9 shown, the drying chamber assembly 15 includes one or more sub-inner cavities 15-1, which are filled with desiccant 15-2 inside. A plastic outer shell 15-3 is sleeved outside the sub-inner cavity, and two air inlets and outlets 15-3-1 are provided on the side wall, which are hermetically connected to the valve body through an O-ring 15-4 and fixed by a dryer fixing bolt 15-5 to ensure the drying treatment of compressed air.

[0050] As Figure 10 , Figure 11 shown, the filtering chamber assembly 11 includes an air filter 11-1, an air inlet and outlet pipe 11-2, an insertion component 11-3 and an air inlet and outlet component 11-4. A one-way valve 12 is provided at the connection between the air inlet and outlet pipe 11-2 and the valve body 3. The one-way valve 12 is in interference fit with the support base 12-2 through a gasket 12-1 to ensure the one-way flow of air.

[0051] As Figure 1 , Figure 5 shown, the pressure sensor 14 is installed between the first switching solenoid valve 8-1 to the fourth switching solenoid valve 8-4 and the fifth air solenoid valve 8-5 to the eighth air solenoid valve 8-8 for real-time monitoring of the internal pressure change of the air circuit.

[0052] The manual exhaust component 13 allows the user to manually discharge the gas in the system when needed, facilitating system maintenance and debugging.

[0053] Combining the above description, the specific working principle of the mechanical module in this application is as follows: Air supply and compression: The air supply unit consists of an air pump 6 and an air inflation motor 7. After the air inflation motor is powered on, it drives the air pump to work through a transmission component (such as an eccentric wheel mechanism 7-1 and a connecting arm 6-1), sucking and compressing the outside air.

[0054] The compressed air first enters the filtering chamber assembly 11, and impurities and particulate matters are removed through the air filter 11-1.

[0055] Gas drying: The filtered compressed air enters the drying chamber assembly 15. Here, the desiccant 15-2 in the sub-inner cavity 15-1 absorbs the moisture in the air to ensure the drying of the compressed air.

[0056] The dried compressed air enters the air circuit 4 inside the valve body 3 through the air inlets and outlets 15-3-1 of the plastic outer shell 15-3.

[0057] Gas distribution and pressure regulation: Compressed air flows in the gas path inside the valve body. Through the control of the switching solenoid valve group 8, it is distributed to different air springs. The switching solenoid valve group includes multiple solenoid valves. For example, the first switching solenoid valve 8-1 is used to supply air to the air spring, and the second switching solenoid valve 8-2 is used to reintroduce the gas discharged from the air spring into the gas storage tank, etc.

[0058] The voltage stabilizing protection valve 9 is used to monitor the pressure in the gas path. When the pressure exceeds the set value, it automatically opens to release some gas to protect the system from excessive pressure.

[0059] The anti-backflow current-limiting valve 10 prevents the backflow of high-pressure gas to ensure the unidirectional flow of the air current.

[0060] Pressure monitoring and manual exhaust: The pressure sensor 14 continuously monitors the pressure changes inside the gas path and transmits the signal to the electronic central control module for precise control.

[0061] The manual exhaust component 13 allows users to manually discharge the gas in the system when needed, facilitating the maintenance and debugging of the system.

[0062] II. Structure and functions of the electronic central control module As Figure 6 shown, the electronic central control module includes a central control upper cover 16 and a central control base 17, which cooperate to form the module housing. The central control PCBA circuit board 18 is fixedly arranged in the inner cavity of the central control base and is the core control component of the system.

[0063] The central control PCBA circuit board 18 includes a solenoid valve drive circuit, which sends a pulse control signal to the switching solenoid valve coil 19 through a wire to precisely adjust the opening and closing state of the solenoid valve.

[0064] As Figure 5 、 Figure 12 、 Figure 14 shown, the switching solenoid valve group 8 includes multiple groups of switching solenoid valves and multiple groups of air solenoid valves, which are respectively used to control the flow direction and air supply mode of the compressed air. For example: The first switching solenoid valve 8-1 is used to control the supply of compressed air to the air spring.

[0065] The second switching solenoid valve 8-2 is used to control the compressed air discharged from the air spring to re-enter the gas storage tank.

[0066] The third switching solenoid valve 8-3 is used to control the compressed air output from the gas storage tank to be compressed by the air pump and then supplied to the air spring.

[0067] The fourth switching solenoid valve 8-4 is used to control the storage or direct supply of compressed air to the gas storage tank.

[0068] The No. 5 air solenoid valve 8-5 to the No. 8 air solenoid valve 8-8 respectively control the supply of air to different air springs or the reception of exhaust air.

[0069] The No. 9 exhaust solenoid valve 8-9 is used to discharge the regeneration waste gas.

[0070] As Figure 6 、 Figure 8 shown, the motor plug 7-4 of the inflation motor 7 is electrically connected through the conductive mother terminal assembly 21 or welded to the central control PCBA circuit board 18.

[0071] The switching solenoid valve coil 19 is pre-installed with an interference fit with the central control base 17 and is electrically connected to the central control PCBA circuit board 18 through welding. The grounding spring 22 ensures the electrical safety of the system.

[0072] Combined with the above description, the specific working principle of the electronic central control module in this application is as follows: 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, and it includes key circuits such as the solenoid valve drive circuit.

[0073] The central control PCBA circuit board receives signals from sensors such as the pressure sensor 14, and processes them according to the preset control algorithm to generate corresponding control signals.

[0074] Solenoid valve drive: The switching solenoid valve coil 19 receives the pulse control signal from the central control PCBA circuit board, and realizes the switching of the opening and closing states of the solenoid valve through the action of electromagnetic force.

[0075] By controlling the opening and closing of different solenoid valves, the electronic central control module can achieve precise control of the flow direction of compressed air, so as to meet the suspension adjustment requirements under different driving conditions and driving demands.

[0076] Electrical connection and grounding: The motor plug 7-4 of the inflation motor 7 is electrically connected through the conductive mother terminal assembly 21 or welded to the central control PCBA circuit board 18 to ensure the normal operation of the motor.

[0077] The switching solenoid valve coil 19 is pre-installed with an interference fit with the central control base 17 and is electrically connected to the central control PCBA circuit board 18 through welding to achieve reliable signal transmission.

[0078] The grounding spring 22 ensures the electrical safety of the system and prevents the occurrence of static interference and leakage.

[0079] III. Overall working process of the system 1. System startup and initialization The electronic central control module (including the central control upper cover, central control base and central control PCBA circuit board) is powered on and starts, and performs internal circuit self-check and initialization settings.

[0080] The air pump and air inflating motor of the mechanical module are in standby state, waiting for control signals.

[0081] Sensors such as pressure sensors start to monitor the internal pressure change of the air circuit in real time and transmit the data to the electronic central control module.

[0082] 2. Air Supply and Compression The electronic central control module sends a start signal to the air inflating motor according to driving demands or preset conditions.

[0083] The air inflating motor drives the air pump to work through transmission components such as eccentric wheel mechanisms, sucking and compressing the outside air.

[0084] The compressed air enters the filter chamber assembly, and impurities and particulate matters are removed through the air filter.

[0085] 3. Gas Drying and Purification The filtered compressed air enters the drying chamber assembly, and the desiccant absorbs the moisture in the air to ensure the dryness of the compressed air.

[0086] The dried compressed air enters the air circuit inside the valve body through the air inlet and outlet of the plastic shell.

[0087] 4. Gas Distribution and Pressure Regulation The compressed air flows in the air circuit inside the valve body. The electronic central control module sends control signals to the switching solenoid valve group according to driving conditions and suspension adjustment demands.

[0088] The switching solenoid valve group controls the flow direction of the compressed air according to the received control signals. 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 gas discharged from the air spring into the air storage tank, etc.

[0089] The pressure stabilizing protection valve monitors the pressure in the air circuit. When the pressure exceeds the set value, it automatically opens to release some gas to protect the system from the influence of excessive pressure.

[0090] The anti-backflow current-limiting valve prevents the high-pressure gas from flowing back and ensures the unidirectional flow of the air current.

[0091] 5. Pressure Monitoring and Feedback Control The pressure sensor monitors the internal pressure change of the air circuit in real time and transmits the signal to the electronic central control module.

[0092] The electronic central control module adjusts the control signals of the switching solenoid valve group according to the feedback signals of the pressure sensor to achieve precise adjustment of the suspension system.

[0093] 6. Manual Exhaust and System Maintenance When necessary, the user can manually discharge the gas in the system through the manual exhaust component, which is convenient for the maintenance and debugging of the system.

[0094] The electronic central control module monitors the status of the manual exhaust component to ensure the normal operation of the system.

[0095] 7. System Shutdown and Standby When the vehicle shuts off or the suspension system no longer needs to be adjusted, the electronic central control module sends a shutdown signal to the inflation motor and the switching solenoid valve group.

[0096] The inflation motor stops working, the switching solenoid valve group closes, and the system enters the standby state.

[0097] In summary, through the collaborative work of the mechanical module and the electronic central control module, the air suspension system realizes the precise adjustment and control of the suspension system. The system can perform adaptive adjustment according to the driving conditions and driving requirements, improving the driving stability and riding comfort of the vehicle.

[0098] IV. Application Examples The present invention also describes a vehicle applying the above air suspension system. By integrating this air suspension system, the vehicle realizes the precise adjustment and control of the suspension system, can perform adaptive adjustment according to the driving conditions and driving requirements, and improves the driving stability and riding comfort of the vehicle.

[0099] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

[0100] In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement; when the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present invention.

Claims

1. An air suspension system, characterized in that: It includes a mechanical module (1) and an electronic central control module (2): Mechanical module (1), comprising: A valve body (3) having an air path (4) disposed therein; An air supply unit connected to the valve body (3) via an air path (4); A switching solenoid valve group (8) and a pressure-stabilizing protection valve (9) are arranged on the valve body (3) and are connected to the gas path (4); A filter chamber assembly (11) connected to the gas circuit (4) via an air inlet and outlet assembly; A pressure sensor (14) and a drying chamber assembly (15) for monitoring and drying compressed air; The electronic central control module (2) includes: The module housing is composed of a central control cover (16) and a central control base (17); A central control PCBA circuit board (18) is fixedly disposed in the inner cavity of the central control base (17); A switching solenoid valve coil (19) is arranged on a central control PCBA circuit board (18) and is electrically connected to the circuit board via a wire; The central control PCBA circuit board (18) comprises a solenoid valve driving circuit, which is used to send a pulse control signal to the switching solenoid valve coil (19) through a wire to adjust the opening and closing state of the switching solenoid valve group (8); The air supply unit compresses the air that has passed through the filter chamber assembly (11), and the compressed air enters the air path (4) and the switching solenoid valve group (8) inside the valve body through the drying chamber assembly (15), and the electronic central control module (2) controls the opening or closing of the switching solenoid valve group (8) to achieve air supply switching.

2. The air suspension system according to claim 1, characterized in that: The air supply unit comprises an air pump (6) and an air motor (7); the air pump (6) is arranged inside the valve body (3), and the air motor (7) is installed outside the valve body (3) and connected to the air pump (6) via a transmission assembly to provide compressed air for the air spring.

3. The air suspension system according to claim 2, characterized in that: The valve body (3) comprises two chambers for installing an air pump (6); the air pump (6) comprises two connecting arms (6-1); the air motor (7) comprises an eccentric wheel mechanism (7-1); the connecting arm (6-1) is connected to the motor shaft (7-2) via a connecting arm mounting port (6-1-2); after the motor is energized, the eccentric wheel mechanism (7-1) converts rotational motion into linear reciprocating motion to compress air.

4. The air suspension system according to claim 1, characterized in that: The drying chamber assembly (15) comprises one or more sub-inner chambers (15-1), a desiccant (15-2) is contained in the sub-inner chambers (15-1), a plastic shell (15-3) is sheathed on the outside of the sub-inner chambers (15-1), and the side wall of the plastic shell (15-3) is provided with two air inlets and outlets (15-3-1), which are sealed and connected to the valve body (3) via an O-ring (15-4) and fixed via a dryer fixing bolt (15-5).

5. The air suspension system according to claim 1, characterized in that: The filter chamber assembly (11) comprises an air filter (11-1), an air inlet and outlet pipe (11-2), a nozzle assembly (11-3), and an air inlet and outlet assembly (11-4); a one-way valve (12) is provided at the connection between the air inlet and outlet pipe (11-2) and the valve body (3); the one-way valve (12) is directly placed in the cavity of the valve body (3) and is interference-fitted with the support base (12-2) via a sealing gasket (12-1).

6. The air suspension system according to claim 1, characterized in that: The switching solenoid valve group (8) comprises a plurality of groups of switching solenoid valves and a plurality of groups of air solenoid valves; The multiple groups of switching solenoid valves are respectively: Switching solenoid valve No. 1 (8-1) is used to control the supply of compressed air to the air spring; Switching solenoid valve No. 2 (8-2) is used to control the compressed air discharged from the air spring to re-enter the air storage tank; A third switching solenoid valve (8-3) is used to control the compressed air output from the air storage tank to be compressed by the air pump (6) and then supplied to the air spring; The fourth switching solenoid valve (8-4) is used to control the compressed air to be stored in the air storage tank or directly supplied; The multiple groups of air solenoid valves are respectively: The No. 5 air solenoid valve (8-5), the No. 6 air solenoid valve (8-6), the No. 7 air solenoid valve (8-7), and the No. 8 air solenoid valve (8-8) respectively control the air supply to different air springs or the air exhaust reception; The No. 9 exhaust solenoid valve (8-9) is used to discharge the regenerated exhaust gas.

7. The air suspension system according to claim 4, characterized in that: An anti-reverse flow limiting valve (10) is provided at the outlet of the drying chamber component (15) to prevent the high-pressure gas from flowing back, and to utilize the high-pressure gas in the gas storage tank to dehydrate the desiccant (15-2) in the dryer regeneration mode.

8. The air suspension system according to claim 2, characterized in that: The air pump (6) comprises two air outlets (6-2), one of which is connected to a pressure-stabilizing protection valve (9). When the pressure reaches a threshold, the pressure-stabilizing protection valve (9) opens, and the gas flows back to the air inlet (6-3) of the air pump to achieve mechanical protection.

9. The air suspension system according to claim 1, characterized in that: The pressure sensor (14) is installed between the switching solenoid valve and the air solenoid valve, and is used to monitor the internal pressure of the air circuit.

10. The air suspension system according to claim 3, characterized in that: The motor plug (7-4) of the inflation motor (7) is electrically connected to the central control PCBA circuit board (18) by plugging into or welding with the conductive female terminal assembly (21).

11. The air suspension system according to claim 1, characterized in that: The switching solenoid valve coil (19) is pre-installed with the central control base (17) by interference fit, and is electrically connected to the central control PCBA circuit board (18) by welding.

12. A vehicle, characterized in that: An air suspension system comprising any one of claims 1 to 11.

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