1528 results about "Air suspension" patented technology

The invention provides an air spring performance degradation characterization method and system, and the method comprises the steps: obtaining a spring stiffness physical parameter generated in a performance degradation test process of an air spring based on an air suspension test system; inputting the spring stiffness physical parameters into an air spring performance degradation model to obtain dynamic stiffness performance degradation data; the dynamic stiffness performance degradation data comprises dynamic stiffness frequency correlation data and dynamic stiffness amplitude correlation data; the air spring performance degradation model comprises a dynamic stiffness frequency correlation model and a dynamic stiffness amplitude correlation model, and the dynamic stiffness frequency correlation model is used for obtaining stiffness frequency correlation data according to air spring internal gas pressure change data in spring stiffness physical parameters; the dynamic stiffness amplitude correlation model is used for obtaining dynamic stiffness amplitude correlation data according to air bag degradation data in the spring stiffness physical parameters. According to the method, more accurate air spring performance prediction and degradation analysis results can be provided.

The invention relates to an air blower based on magnetic and gas combination axial force balance and a control method of the air blower, and belongs to the technical field of axial force regulation and control of air blowers. An axial air suspension bearing and an axial magnetic bearing are arranged in a main machine of the air blower, the axial magnetic bearing is connected with a magnetic bearing controller, and the magnetic bearing controller controls the axial position of a rotor by controlling the current of the axial magnetic bearing; an axial displacement sensor and a radial displacement sensor are arranged to detect the displacement of the rotor; and the main controller is used for controlling the starting and stopping of the axial magnetic bearing and the main machine based on the axial displacement and the radial displacement of the rotor, and sending out early warning. According to the magnetic and air combined axial force balance device, the axial magnetic bearing is used for providing active control force, the air bearing is used for providing passive support, the stability and reliability of a system are improved, and an important protection effect is achieved on core parts of an air blower.

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.

The invention belongs to the technical field of thermal barrier coatings, and provides an artificial preparation method of multi-scale aero-engine environment sediment particles. The preparation method comprises the following steps: grinding CMAS original powder into mixture powder; calculating the mass of the required mixture powder according to the powder density of the CMAS original powder and the particle size of the target sediment particles; weighing the mixture powder, and pressing the mixture powder into sheets; in an air suspension furnace, tabletting and melting the mixture powder into balls by adopting a laser; and rapidly cooling to normal temperature to obtain the target sediment particles with the target particle size. The melting process of the CMAS powder is greatly improved, the gas suspension furnace and the laser are used for heating, single CMAS particles with the designed size can be obtained in a short time, the preparation time is shortened, and the preparation cost is effectively reduced.

The invention discloses an air suspension and ESC coordination control method and system based on deep learning, and belongs to the field of automobile braking, and the method comprises the following steps: S1, collecting historical data of vehicle driving, generating extreme working condition data by using vehicle dynamics simulation software, and forming a training data set; s2, constructing a double-branch fusion control model, and training the double-branch fusion control model; s3, vehicle state parameters and road surface condition data are collected in real time; s4, after feature extraction and fusion are carried out on the processed multi-source parameters, the trained double-branch fusion control model is input, and an optimal control strategy is generated; and S5, the ESC executes the optimal control strategy and collects vehicle state data after execution to form a control closed loop. By the adoption of the air suspension and ESC coordinated control method and system based on deep learning, the deep learning and the vehicle dynamics model are combined, the vehicle motion state can be monitored in real time, accurate control is conducted according to real-time data, and the potential out-of-control situation is avoided.

The invention discloses an air suspension self-adaptive adjustment method and system based on road condition recognition and prediction, and belongs to the field of air suspension adjustment. S1, parameters of an air suspension are initialized; s2, predicting road condition information of a road to be driven in real time; meanwhile, identifying the road condition information of the current driving road; s3, adjusting the height, rigidity and damping of the air suspension in combination with the predicted road condition information of the road to be driven and the identified road condition information of the current driving road; and S4, circularly executing the steps S2 to S3. By the adoption of the air suspension self-adaptive adjusting method and system based on road condition recognition and prediction, the height, rigidity and damping of the air suspension can be automatically adjusted according to the current road condition and the road condition of the road to be driven, the driving comfort and the driving stability of the vehicle are improved, and therefore the vehicle and passengers are protected; the system has the advantages of being high in universality and flexibility, low in maintenance cost, high in response speed, high in driving comfort and stability and the like.

The invention provides a predictive maintenance method and system for an air suspension fan based on digital twinning, and the method comprises the steps: collecting an air flow abrupt change characteristic when high-temperature dust-containing waste gas flows into the air suspension fan, transmitting the air flow abrupt change characteristic to a digital twinning system, and determining the air flow abrupt change characteristic; extracting a local clearance reduction trend of the foil and the bearing from the non-uniform expansion amount of the foil, and calculating space distribution after clearance reduction to obtain a target gas film thickness value; the target gas film thickness value is compared with a preset collision and abrasion threshold value, and if the target gas film thickness value is smaller than the threshold value, the collision and abrasion risk probability is evaluated through a Monte Carlo method; if the collision and abrasion risk probability exceeds a preset safety range, calculating a gas film rigidity fluctuation range based on a gas dynamics theory; and extracting a vibration amplitude analysis result from the dynamic response parameters of the foil bearing of the air suspension fan, and calculating a stability prediction index.

The invention provides a vehicle attitude control device and method, and relates to the technical field of vehicle control. The device comprises the steps that a brake-by-wire system collects the wheel speed of each wheel of a vehicle and obtains attitude data, deviation calculation is conducted on the attitude data and the wheel speeds, an attitude deviation value is obtained, and the vehicle state of the vehicle is matched from a stability degree table according to the attitude deviation value; the air suspension system collects suspension height signals of all wheels of the vehicle, when the brake-by-wire system judges that the state of the vehicle is an unstable state, the suspension height signals of all the wheels are adjusted according to adjusting rules, and height adjusting signals corresponding to all the wheels are obtained; the air suspension system adjusts the height of the air spring of the corresponding wheel according to the plurality of height adjustment signals. The vehicle is jointly controlled through the brake-by-wire system and the air suspension system, the height of an air spring of the vehicle is adjusted, the vehicle is prevented from rolling over due to the unstable gravity center, and the safety of the vehicle is improved.

The invention discloses a vehicle-mounted oxygen generation system, a vehicle system, a vehicle-mounted oxygen generation control system and a control method.The vehicle-mounted oxygen generation system comprises a shell, a molecular sieve and an oxygen storage tank, and the molecular sieve and the oxygen storage tank are arranged in the shell; the air inlet is configured to be connected with an air suspension air tank in a vehicle air suspension system outside the shell so as to provide air for the molecular sieve; one end of the air pipe is communicated with an outlet of the oxygen storage tank, the other end of the air pipe is configured to be communicated with a vehicle cab outside the shell, and a controllable electronic valve is arranged on the outlet of the oxygen storage tank or the air pipe. New configuration optimization is made based on an air compressor and an air storage tank of an existing vehicle air suspension system, the oxygen generation function is achieved on the basis that the original air suspension function of the system is protected, and the adverse effects on the available space and the loading capacity of a vehicle are greatly reduced.

The utility model discloses a rigidity valve, which is used in the technical field of automobile air suspension systems, and structurally comprises a valve body and a valve seat connected on the valve body, the valve body comprises a valve core and an electromagnetic driving mechanism for driving the valve core to move axially, the valve seat is provided with a valve cavity and a valve port, the valve core is in clearance fit in the valve cavity, and the valve core is in clearance fit with the valve port. The valve body is used for opening or closing the valve port; the rigidity valve further comprises a diaphragm made of flexible materials, the diaphragm is fixedly connected to the valve element and connected with the valve element in a sealed mode, and the outer edge of the diaphragm is connected with the valve cavity in a sealed mode and used for preventing media in the valve cavity from entering the side, away from the valve port, of the diaphragm. The rigidity valve is good in sealing performance, long in service life and low in energy consumption, and the reliability requirement for closing or opening the valve port of the valve element can be met.

The utility model relates to a shell assembly, a gas compression and supply device, an air suspension system and a vehicle, the shell assembly is used for the gas compression device and comprises a shell and a heat dissipation flow channel, the shell is provided with a containing cavity used for containing a piston mechanism, and the containing cavity is divided into a first-stage compression cavity and a second-stage compression cavity through the piston mechanism; the heat dissipation flow channel is communicated with the first-stage compression cavity and the second-stage compression cavity, and at least part of the heat dissipation flow channel is formed in the shell so that heat dissipation can be conducted on gas flowing through the heat dissipation flow channel through the heat dissipation flow channel, the internal temperature of the gas compression device can be reduced, the performance of the gas compression device can be optimized, and the gas compression device has the advantages of being simple in structure and convenient to install and manufacture.

The embodiment of the invention provides an air supply system and an air supply method of an air suspension with multiple working modes. Wherein the air supply system comprises an air storage tank, a plurality of air springs, an air supply valve body group, a temperature pressure sensor, a vacuum suction valve pipeline, an air inlet valve pipeline and a negative pressure pipeline. The air supply valve body group is provided with a first ventilation port, a second ventilation port and a plurality of third ventilation ports, the second ventilation port is communicated with the air storage tank, and the plurality of third ventilation ports are communicated with the plurality of air springs in a one-to-one correspondence manner; the vacuum suction valve pipeline comprises a vacuum generator, the air inlet valve pipeline comprises a dryer, a first ventilation port of the air supply valve set is communicated with the outside through the vacuum suction valve pipeline and the air inlet valve pipeline which are arranged in parallel, and the vacuum generator is selectively communicated with the dryer through a negative pressure pipeline. Therefore, the air supply system provided by the embodiment of the invention has the advantages of reducing the regeneration temperature of the drying agent and prolonging the service life of the electric appliance element.

The invention relates to the technical field of air supply unit testing of an air suspension, in particular to air supply unit testing equipment and a testing system of the air suspension, and the testing equipment comprises a high-low temperature damp-heat alternating testing box, four simulation air spring load devices, an industrial personal computer and a first testing air path; the simulated air spring load device is used for simulating the load of an automobile body on the air spring; the gas supply unit is used for testing in a test room of the high-low temperature damp-heat alternating test box, and the high-low temperature damp-heat alternating test box, the gas supply unit and the first test gas path are all controlled by the industrial personal computer; the first test gas circuit is used for testing the gas supply unit. According to the invention, the air supply unit to be tested of the air suspension is tested in a simulated extreme environment, and the weight is increased or decreased to simulate the load of the vehicle body on the air spring, so that the core capabilities of pressure-flow control, environmental adaptability, reliability and the like of the air supply unit are effectively and systematically verified. The verification of the air supply unit is directly related to the safety, comfort and durability of the automobile.

The invention relates to an air suspension controller function automation test system and a test method. The air suspension controller function automation test system comprises a cabinet which comprises a board card assembly and a real-time processor, and the board card assembly comprises an IO board card and a load board card; a tested air suspension controller; a real load; a CANoe software, a Notepad + + software and a MATLAB / Simulink software are operated on the upper computer; during working, the upper computer generates a control signal to trigger a test, the real-time processor sends an analog sensor signal, the controller calculates a target current, the shunt drives a real load and model update, and the controller generates an observation signal and returns the observation signal to the upper computer after a model state is fed back. The system and the method can realize full-working-condition automatic testing and improve the efficiency and the coverage range.

The invention relates to a height adjustment precision calibration method based on a steady-state air suspension system, which is characterized in that the method is static (not influenced by external force), and the pressure difference between the input end and the output end corresponding to the height of a certain air spring is constant (the input end is an air pump and an air storage tank during ascending, the output end is the air spring, and the input end and the output end are opposite during descending); when the sensor rises or falls to a certain target height, the overshoot is constant, and the descending adjustment threshold calibration process of the certain target height comprises the following steps: (1) rising and falling to Hi for many times, recording the height values hi drop 1, hi drop 2, hi drop 3,..., hi drop n (n can be determined by a tester, for example, n = 10) of the sensor after the adjustment is finished and the height is stable, and for a multi-air-spring system, determining the height of the sensor according to the height of the sensor; the absolute values of a plurality of height sensors can be calculated to serve as height adjustment results, a simpler model and a calibration method with higher operability are adopted, and the precision control over height adjustment is more direct and effective.

The invention relates to a vehicle underpinning monitoring and lifting method based on an air suspension system, and the method comprises the following specific steps: S1, judging the motion state of a vehicle according to the actual gear state and the vehicle speed of the vehicle, and judging that the vehicle is in a static state if the actual gear of the vehicle is a P gear and the vehicle speed is smaller than a preset threshold value; s2, recognizing the motion state of the vehicle, judging whether the vehicle is in a static state or not, whether a received height gear is lowered or not, whether an air suspension needs height lowering adjustment or not, whether a motor and an electromagnetic valve work normally or not, and whether there is no fault or overheating or not, if yes, entering the next step, otherwise, directly ending, and if not, entering the next step; the method has the characteristics that the stability and robustness of the system are improved, the misjudgment phenomenon is avoided, and the vehicle safety is ensured.

The invention discloses a heavy air suspension truck anti-roll control method based on an extended zero moment point, and the method comprises the following steps: S1, building a virtual prototype model of a heavy truck, and obtaining a centroid pitch angle, a roll angle, a yaw angle and accelerations in X, Y and Z directions under a vehicle driving condition in real time; s2, based on an extended zero moment point theory, constructing a vehicle body attitude evaluation index based on extended zero moment point coordinates; s3, calculating a vehicle body posture evaluation index in real time under the vehicle driving condition, and judging whether the vehicle rolls or not; and S4, on the basis of a layered architecture control strategy, the upper layer calculates air spring force needed by anti-roll based on fuzzy PID, the lower layer inflates and deflates the air spring to output the needed air spring force, and the posture of the vehicle body is balanced. According to the method, the stability of the vehicle body can be evaluated in real time through the extended zero moment point theory, the roll risk is accurately judged, anti-roll measures are taken, and the driving stability is remarkably improved.

The invention discloses a colloid visual identification method for gluing a rear cover of an air suspension controller, and the method comprises the following specific colloid visual identification steps: collecting an image of colloid on the rear cover of the controller after the colloid is projected by a light source, carrying out the graying processing of the obtained image through an image processing module, carrying out the image segmentation of the image after the graying processing, and carrying out the visual identification of the colloid on the rear cover of the controller. Obtaining a first image; performing sharpening enhancement processing on the image through histogram equalization to obtain a second image, inputting the first image into an image neural network for image denoising enhancement, and marking the output image as a third image; and fusing the second image and the third image through a multi-scale feature fusion technology, carrying out Laplace edge detection on the fused image, and outputting state information of the width and height of the colloid according to the contour edge of the rear cover frame and the contour edge of the colloid shadow. According to the invention, the quality of the colloid image can be effectively improved, parameters of the colloid can be better identified and detected, and the accuracy of identification and detection is improved.

The invention relates to the technical field of blast pump detection, in particular to an air suspension blast pump convenient and rapid detection box device which comprises a test box body, a bottom plate, an eccentric wheel set, a switching mechanism, a transmission mechanism and a blast pump mounting mechanism, a box cover is rotatably hinged to the outer side of the test box body, and an operation plate is fixedly connected in the test box body; hydraulic rods are fixedly connected to the inner wall of the box cover. By integrating the test box body, the switchable eccentric wheel group and the sound insulation cover mechanism, multi-working-condition dynamic simulation and noise isolation are realized in single equipment, the problems of low detection efficiency, high cost and data deviation in the prior art are effectively solved, two groups of detection stations are arranged, a control group is conveniently provided, and the detection efficiency is improved. According to the air pump data detection device, the detected air pump data are more accurate and reliable, the detection devices are modularly combined in the test box body, the detection steps are more convenient, the detection efficiency is improved, and the use requirements of people are met.

The invention relates to a three-dimensional microgravity simulation system, and belongs to the field of spaceflight mechanism ground tests. According to the three-dimensional microgravity simulation system, ground six-degree-of-freedom microgravity simulation can be realized, the aircraft simulator and accessories thereof have a five-degree-of-freedom motion state on an air floating plane through the five-degree-of-freedom air floating platform, and the aircraft simulator can have a three-dimensional space six-degree-of-freedom motion state through the magnetic air suspension assembly. In the process of a ground microgravity experiment, the gravity of the movement of the aircraft and accessories thereof is unloaded by the magnetic suspension assembly, so that the movement interference of the aircraft simulator and the microgravity simulation tool is avoided, and the problem of dynamic high-precision gravity unloading is solved.

The invention relates to the technical field of vehicle control, and provides an air suspension control system and method, electronic equipment and a storage medium. The system comprises an air compression pump, a high-pressure air storage tank and at least two air springs, wherein each air spring is associated with one wheel; wherein the air compression pump is communicated with the high-pressure air storage tank; each air spring corresponds to one air inlet air valve, each air spring is connected with the high-pressure air storage tank through the corresponding air inlet air valve, and the high-pressure air storage tank is used for providing boosting air for the air springs when the air inlet air valves corresponding to the air springs are opened so as to increase the distance between wheels related to the air springs and a vehicle body; each air spring corresponds to one air outlet air valve, the air outlet air valves are used for reducing the air pressure of the corresponding air springs so as to reduce the distance between the air spring associated wheels and the vehicle body, each air spring in the system provided by the invention can independently carry out air inlet and air outlet, and the work of other air springs is not influenced; and the adjusting accuracy and efficiency of the air spring are improved.

The invention provides a silencer, an air suspension assembly and a vehicle, relates to the technical field of vehicles, and aims to reduce the size of the air suspension assembly. The silencer comprises a flow guide plate, a shell, an air suction end cover and a silencing piece. The guide plate has guide holes. The shell is provided with a containing space, the flow guide plate abuts against the inner wall of the containing space so that the containing space can be divided into a silencing cavity and a pressure reduction cavity, the silencing cavity communicates with the pressure reduction cavity through the flow guide hole, the silencing cavity is provided with an exhaust port, and the pressure reduction cavity is provided with an exhaust port used for being connected with an exhaust pipe. The air suction end cover extends from one side of the shell to the direction away from the shell to form an air suction cavity, the end, away from the shell, of the air suction cavity is provided with an air suction port and an air suction port, the air suction port communicates with the outside, and the air suction port is used for being connected with an air supply pipe. And the silencing piece is arranged in the silencing cavity. Therefore, the size of the air suspension assembly can be reduced, and the cost of the air suspension assembly can be reduced.

The present invention is applicable to an air suspension purification device based on environmental monitoring results, comprising: a base and a processing box installed on the base, wherein a first through slot is provided on a side of the processing box away from the base; and an adsorption box, wherein the adsorption box is embedded in the processing box and is detachably connected to the inclined plate through an extension plate fixed on the adsorption box, wherein the extension plate is provided with at least one air intake through slot connecting the inside and outside of the adsorption box, wherein the slow flow chamber is connected to the inner side of the adsorption box through a third through slot provided on the adsorption box, wherein an adsorption assembly is provided on the inner side of the third through slot. The preliminary filtration is performed by the filter plate provided, and the gas after the preliminary filtration passes through an ion generator to charge the suspended matter, and the charged suspended matter is adsorbed on the electrostatic adsorption plate when passing through the electrostatic adsorption plate, thereby achieving the purification of the suspended matter in the gas.

The invention discloses an air suspension turbine power generation and refrigeration integrated device which comprises a shell, a stator and a rotor spindle, the rotor spindle is rotationally arranged in the shell through a bearing assembly, the stator is fixed in the shell and is coaxial with the rotor spindle, and an air gap exists between the stator and the rotor spindle to form a permanent magnet synchronous generator. The rotor further comprises a first-stage volute, a second-stage volute, a first-stage radial flow turbine, a second-stage radial flow turbine, a volute connecting pipe and a cooling water jacket, the first-stage volute and the second-stage volute are fixed to the two ends of the shell respectively, and the first-stage radial flow turbine and the second-stage radial flow turbine are coaxially fixed to the two ends of the rotor spindle respectively and are arranged back to back; the first-stage radial flow turbine is located in the first-stage volute, the second-stage radial flow turbine is located in the second-stage volute, the first-stage volute is provided with a high-temperature and high-pressure air inlet and a first-stage air outlet, and the second-stage volute is provided with a second-stage air inlet and an expansion cooling air exhaust port; the device has the advantages of being capable of stably running at a high speed in a high-altitude low-pressure environment and simultaneously achieving efficient power generation and refrigeration functions.

The invention discloses a multi-parameter fusion air suspension heat pump AI load prediction energy-saving control method. The method comprises the following steps: constructing a multi-source heterogeneous parameter acquisition system and preprocessing data; fusing the parameter spatio-temporal features through a multi-head spatio-temporal feature extraction module embedded with an attention mechanism; establishing a load prediction model integrating a long-short-term memory network and thermodynamic physical constraints; on the basis of a model predictive control framework, a future control instruction is optimized under the condition that comfort and equipment safety constraints are met; an online learning and updating mechanism based on prediction error triggering is introduced, and the model weight is dynamically and finely adjusted to adapt to system characteristic changes. According to the technical scheme, the load prediction precision and the control response speed under the complex working condition are remarkably improved, the real-time optimization of the system energy efficiency is achieved, and the long-term operation stability is guaranteed.

The invention provides an intelligent control system and method for an air suspension shock absorber of a new energy automobile, and relates to the field of intelligent control of the new energy automobile, and the intelligent control method comprises the following steps: carrying out data integration and time sequence feature coding on a set of vehicle state data by adopting a data processing technology based on deep learning; aggregation and parameter correlation are carried out on the time sequence characteristics of the vehicle state data, so that the pressure value of the air spring is intelligently predicted based on the global-local semantic mapping enhanced representation of the time sequence correlation coding characteristics of the aggregated and correlated vehicle state parameters; and the pressure value of the air spring is adaptively adjusted according to the comparison with the real-time parameters. In this way, the pressure of the air spring can be dynamically adjusted in real time, and the driving experience and the driving safety can be improved.

The invention provides a closed air supply management method and device of an air suspension system. The method comprises the following steps: in response to a gas supply request from a client to an external load, displaying a first input control for acquiring the type of the external load; under the condition that the first input control collects the target type of the external load, a preset target gas supply standard for the external load is determined according to the target type of the external load; according to the target air supply standard, air is supplied to an external load through the air suspension system; if the gas supply time is within the gas supply time threshold value, the first prompt information is pushed to the client, so that the preset gas supply standard is provided for the external load based on the type of the external load, gas can be supplied to the connected external load in time based on the preset gas supply standard, and the gas supply efficiency is improved. The gas supply requirements of different external loads can be met, and the safety in the gas supply process is guaranteed.

The invention discloses a cleaning and disinfecting device for salted duck egg processing, and relates to the technical field of salted duck egg cleaning and disinfecting. The device comprises an ultrasonic cleaning tank, a supporting table is arranged on the left side of the ultrasonic cleaning tank, a disinfection device is arranged at the top of the supporting table, a second gentle conveying section is arranged above the supporting table, a first gentle conveying section is arranged in the ultrasonic cleaning tank, and a silica gel tank body is connected between the first gentle conveying section and the second gentle conveying section; multiple groups of open grooves are formed in the front side wall and the rear side wall of the silica gel groove body, an air suspension conveying mechanism is arranged in the silica gel groove body, and the V-shaped silica gel groove and the air suspension guiding mechanism are arranged, so that when duck eggs are conveyed, the duck eggs are conveyed in a non-contact mode, mechanical collision is eliminated, the duck eggs are protected against damage, and the subsequent pickling effect is improved.

The invention relates to the technical field of temperature adjusting systems, in particular to an air supply device of an air suspension bearing and a temperature adjusting system, and aims at solving the problem that the energy consumption is too large when an electric heater heats a liquid refrigerant. In order to achieve the purpose, the air supply device of the air suspension bearing comprises a refrigerant tank connected with the air suspension bearing, and the refrigerant tank is used for conveying gaseous refrigerants to the air suspension bearing; and the heat pump assembly comprises a first condenser arranged in the refrigerant tank, and the first condenser can heat a refrigerant in the refrigerant tank into a gas state. The first condenser of the heat pump assembly releases heat in the refrigerant tank to heat the liquid refrigerant in the refrigerant tank, so that the liquid refrigerant is heated to be in a gaseous state, and the gaseous refrigerant supplies air to the air suspension bearing. The heating efficiency of the heat pump assembly is far higher than that of an electric heater in the prior art. Therefore, the arrangement mode can effectively reduce the energy consumption of heating the refrigerant.

The invention discloses a power-on self-test method and system for a closed air suspension system, and the method comprises the steps: starting self-test after receiving a vehicle power-on signal, opening an air path switching valve RV2 and an air escape valve VV, enabling a pressure sensor pipeline to be communicated with the atmosphere, and generating an initial air path detection result; based on the initial gas path detection result, closing a gas release valve VV and opening a gas path switching valve RV1 to enable a pressure sensor pipeline to be communicated with the gas storage tank, and generating a gas path detection result of the gas storage tank; on the basis of the air storage tank air path detection result, an air path switching valve RV1 is closed, all air spring distribution valves ASV1 to ASV2 are sequentially opened, and an air spring detection result is generated; and on the basis of the air spring detection result, all the distribution valves are closed, the air path switching valve RV2 is opened, the air pump is started, a pressure value is read after waiting for a preset time T4, when the pressure value is larger than a threshold P7, it is judged that the air pump is normal, and a system self-inspection result is generated. According to the embodiment of the invention, comprehensive self-inspection of the system can be quickly completed when the vehicle is powered on, and the reliability of the vehicle is improved.