Suspension system pressure anomaly diagnosis protection method, device, equipment and medium

Abstract

This invention discloses a method, device, equipment, and medium for diagnosing and protecting against abnormal pressure in a suspension system. The method includes: determining whether there is an abnormality in the high-pressure chamber pressure and the low-pressure chamber pressure detected by a pressure sensor; when there is an abnormality in either the high-pressure chamber pressure or the low-pressure chamber pressure, determining whether the pressure sensor is faulty; if the pressure sensor is faulty, recording the corresponding first type of fault code and executing a first fault response; if the pressure sensor is not faulty, recording the corresponding second type of fault code, counting the cumulative number of second type of fault codes, and determining whether to execute a second fault response based on the cumulative number of counts. This method significantly improves the accuracy and reliability of suspension system pressure diagnosis, enables early warning of potential faults in the pressure chambers, extends the system's service life, and improves vehicle comfort and safety.

Description

Technical Field

[0001] This application relates to the field of vehicle suspension systems, specifically to a method, device, equipment, and medium for diagnosing and protecting against abnormal pressure in a suspension system. Background Technology

[0002] As the automotive industry continues to demand higher levels of comfort, handling, and safety from vehicles, fully active suspension systems, which can actively adjust damping force and vehicle posture, greatly enhance a vehicle's anti-roll and anti-pitch capabilities, and have become one of the core configurations for high-end models and intelligent connected vehicles.

[0003] The hardware of a fully active suspension system consists mostly of precision components, requiring extremely high levels of cleanliness, machining accuracy, and operational stability. In actual operation, the hardware is prone to failure modes such as leakage, continuous pressure fluctuations, or exceeding limits due to seal failure, mechanical jamming, or fluid contamination. Although pressure protection strategies for the high-pressure chambers of the suspension system are generally in place, the following problems remain: false alarms may occur when the high-pressure chamber pressure has not yet exceeded the set threshold; and there is a lack of corresponding diagnostic and protection mechanisms when abnormal pressure accumulates continuously in the high and low pressure chambers. Without early diagnosis and warning, the system pressure may eventually exceed the safety threshold, not only damaging the hardware lifespan but also leading to a decrease in vehicle comfort and handling, and even affecting driving safety. Summary of the Invention

[0004] This application provides a method, device, equipment, and medium for diagnosing and protecting against abnormal pressure in a suspension system, which can solve the technical problems existing in the prior art, such as the single protection strategy for high and low pressure chambers of the suspension system, incomplete identification of abnormal pressure in high and low pressure chambers, delayed fault prediction, and high false alarm and missed alarm rates.

[0005] In a first aspect, embodiments of this application provide a method for diagnosing and protecting against abnormal pressure in a suspension system, the method comprising: Determine if there are any abnormalities in the high-pressure chamber pressure and low-pressure chamber pressure detected by the pressure sensor; When the pressure in the high-pressure chamber or the pressure in the low-pressure chamber is abnormal, determine whether the pressure sensor is faulty. If the pressure sensor malfunctions, the corresponding first type of fault code is recorded, and the first fault response is executed. If the pressure sensor is not faulty, the corresponding second type of fault code is recorded, the cumulative number of the second type of fault code is counted, and a second fault response is determined based on the cumulative number of counts.

[0006] In conjunction with the first aspect, in one implementation, determining whether there is an abnormality in the pressure of the high-pressure chamber includes: If the pressure in the high-pressure chamber is greater than or equal to a preset first pressure threshold, then it is determined that the pressure in the high-pressure chamber is abnormal. If the pressure in the high-pressure chamber is less than the first pressure threshold, then it is determined that the pressure in the high-pressure chamber is not abnormal. Wherein, the first pressure threshold is M times the theoretical required pressure of the high-pressure chamber, where M is greater than 1.

[0007] In conjunction with the first aspect, in one implementation, determining whether there is an anomaly in the low-pressure chamber pressure of the active suspension includes: If the pressure in the low-pressure chamber is greater than or equal to a preset second pressure threshold, then it is determined that the pressure in the low-pressure chamber is abnormal. If the pressure in the low-pressure chamber is less than the second pressure threshold, then it is determined that the pressure in the low-pressure chamber is not abnormal. Wherein, the second pressure threshold is N times the initial static pressure of the low-pressure chamber system, where N is greater than M.

[0008] In conjunction with the first aspect, in one implementation, determining whether to execute a second fault response based on the cumulative number of occurrences includes: Compare the cumulative number of times with a preset number of times threshold; If the cumulative number of times is greater than or equal to the number of times threshold, then the second fault response is executed; If the cumulative number of occurrences is less than the number threshold, the second fault response will not be executed.

[0009] In conjunction with the first aspect, in one implementation, determining whether to execute a second fault response based on the accumulated number of times further includes: When the pressure in the high-pressure chamber or the low-pressure chamber is first determined to be abnormal, a statistical time window with a duration of T is initiated. If the cumulative number of times is greater than or equal to a preset threshold number of times before the end of the time window, then the second fault response is executed; If the cumulative count is less than the count threshold at the end of the time window, then the cumulative count is reset to zero; When the pressure in the high-pressure chamber or the low-pressure chamber is again determined to be abnormal, a new time window is restarted. In conjunction with the first aspect, in one implementation, the first fault response and the second fault response include: The vehicle may illuminate its malfunction indicator light, display malfunction information on its human-machine interface, or issue a voice malfunction prompt. In conjunction with the first aspect, in one embodiment, before determining whether there is an anomaly in the high-pressure chamber pressure and the low-pressure chamber pressure detected by the pressure sensor, the method further includes: It is confirmed that the vehicle is in normal driving condition, and that no fault codes are triggered in the sensors in the sensing module and the actuators in the execution module of the suspension system. The sensors in the perception module include a height sensor and a vehicle acceleration sensor, and the actuators in the execution module include a shock absorber, an energy storage device, and a hydraulic pump.

[0010] Secondly, embodiments of this application provide a diagnostic and protection device for abnormal suspension system pressure, the diagnostic and protection device for abnormal suspension system pressure includes: The first determining module is used to determine whether there are any abnormalities in the high-pressure chamber pressure and the low-pressure chamber pressure detected by the pressure sensor; The second determining module is used to determine whether the pressure sensor is faulty when there is an abnormality in the pressure of the high-pressure chamber or the pressure of the low-pressure chamber. The first response module is used to record the corresponding first type of fault code and execute the first fault response if the pressure sensor is faulty. The second response module is used to record the corresponding second type of fault code if the pressure sensor is not faulty, and to count the cumulative number of the second type of fault code, and to determine whether to execute the second fault response based on the cumulative number.

[0011] Thirdly, embodiments of this application provide a diagnostic and protection device for abnormal suspension system pressure. The device includes a processor, a memory, and a diagnostic and protection program for abnormal suspension system pressure stored in the memory and executable by the processor. When the processor executes the diagnostic and protection program for abnormal suspension system pressure, it implements the steps of the diagnostic and protection method for abnormal suspension system pressure as described in any of the preceding claims. Fourthly, embodiments of this application provide a computer-readable storage medium, characterized in that the computer-readable storage medium stores a diagnostic protection program for abnormal suspension system pressure, wherein when the diagnostic protection program for abnormal suspension system pressure is executed by a processor, it implements the steps of the diagnostic protection method for abnormal suspension system pressure as described in any of the preceding claims.

[0012] The beneficial effects of the technical solutions provided in this application include: This system determines whether there are any abnormalities in the high-pressure chamber pressure and low-pressure chamber pressure detected by pressure sensors. When either the high-pressure chamber pressure or the low-pressure chamber pressure is abnormal, it determines whether the pressure sensor is faulty. If the pressure sensor is faulty, the corresponding first type of fault code is recorded, and a first fault response is executed. If the pressure sensor is not faulty, the corresponding second type of fault code is recorded, and the cumulative number of the second type of fault code is counted. Based on the cumulative number of counts, it is determined whether to execute a second fault response. This solves the problems in related technologies where it is difficult to effectively distinguish between sensor hardware failure and system pressure abnormality, it is difficult to avoid false alarms of pressure abnormality caused by instantaneous interference, and there is a lack of early identification and warning of cumulative faults, resulting in insufficient reliability of the suspension system, increased risk of hardware wear, and decreased user experience.

[0013] This method effectively improves the accuracy of diagnosing abnormal pressure in the high and low pressure chambers of the suspension system. Through a graded response strategy, it not only ensures rapid and safe protection of the system under sensor hardware failure, but also realizes intelligent early warning of cumulative faults in the hydraulic system. This effectively reduces the false alarm rate of the system, extends the life of key hardware, improves the comfort and safety of vehicle driving, and reduces subsequent maintenance costs through early fault diagnosis. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the suspension system architecture; Figure 2 This is a flowchart illustrating an embodiment of the method for diagnosing and protecting against abnormal pressure in the suspension system according to this application. Figure 3 This application provides a schematic diagram illustrating the specific process for diagnosing and protecting against abnormal pressure in the suspension system.

[0015] Figure 4 This is a schematic diagram of the functional modules of an embodiment of the diagnostic and protection device for abnormal suspension system pressure of this application. Figure 5 This is a schematic diagram of the hardware structure of the suspension system pressure abnormality diagnosis and protection device involved in the embodiment of this application. Detailed Implementation

[0016] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present application.

[0017] To make the objectives, technical solutions, and advantages of this application clearer, the embodiments of this application will be described in further detail below with reference to the accompanying drawings.

[0018] In a first aspect, embodiments of this application provide a method for diagnosing and protecting against abnormal pressure in a suspension system.

[0019] The suspension system pressure anomaly diagnosis and protection method of this embodiment can be used in vehicles equipped with a hydraulic fully active suspension system. For example... Figure 1 As shown, the hydraulic fully active suspension system in this embodiment consists of a sensing module, a computing module, and an execution module.

[0020] The perception module is used to collect vehicle driving status and road information in real time. The sensors in the perception module include, but are not limited to: 4 height sensors for monitoring vehicle height and attitude; 3 vehicle acceleration sensors for acquiring vertical, lateral and longitudinal acceleration of the vehicle body; and 4 wheel acceleration sensors (optional) for acquiring wheel vibration status.

[0021] The calculation module is usually an electronic control unit (ECU), which receives the sensing signals from the sensing module and calculates the required damping force and support force at each wheel end in real time according to the preset control algorithm, and then decomposes them into corresponding execution commands.

[0022] The actuator module executes corresponding hydraulic actions according to the ECU's instructions. The actuators in the module mainly include: four continuously damped adjustable dual solenoid valve dampers, used to adjust damping characteristics based on current signals; four integrated accumulator assemblies, used to store and release hydraulic energy and buffer system pressure fluctuations; four electro-hydraulic pump assemblies, used to provide hydraulic power to the system; and hydraulic pipelines connecting various components. The electro-hydraulic pump assemblies integrate pressure and temperature sensors, enabling real-time monitoring of the oil pressure and temperature in the high-pressure and low-pressure chambers of the suspension system.

[0023] When the suspension system is working, the ECU calculates the force required at each wheel end in real time based on signals from the height sensor, vehicle acceleration sensor, etc., and adjusts the current of the solenoid valve and the speed of the electro-hydraulic pump motor accordingly to adjust the damping force in real time and enhance the vibration attenuation of the wheel ends. At the same time, through the pumping and slurring action of the electro-hydraulic pump, the wheels are actively raised and lowered and the vehicle body attitude is adjusted, thereby significantly improving the vehicle's handling and comfort.

[0024] The integrated pressure and temperature sensors of the electro-hydraulic pump can continuously detect and provide feedback on the pressure and temperature information of the high-pressure and low-pressure chambers. Based on the system's sealing pressure resistance and the temperature resistance characteristics of each component, in addition to formulating a graded protection strategy, it is also necessary to identify and warn of potential risks in advance to achieve early detection and early maintenance, so as to reduce performance degradation, safety risks and maintenance costs caused by serious system failure.

[0025] In one embodiment, reference is made to Figure 2 , Figure 2 This is a flowchart illustrating the first embodiment of the method for diagnosing and protecting against abnormal suspension system pressure according to this application. Figure 2 As shown, the diagnostic and protective methods for abnormal suspension system pressure include: Step S101: Determine whether there are any abnormalities in the high-pressure chamber pressure and low-pressure chamber pressure detected by the pressure sensor.

[0026] In one embodiment, before performing the diagnostic process for abnormal pressure in the high-pressure chamber and low-pressure chamber of the suspension system, a hardware status pre-check needs to be performed: confirming that the vehicle is in normal driving condition and that no fault codes are triggered in the sensors in the sensing module and the actuators in the execution module of the suspension system, and no alarms are generated.

[0027] The core of this step is to eliminate interference from hardware-level faults and ensure that the sensors and actuators themselves work properly during subsequent diagnostics, providing a reliable foundation for pressure monitoring and fault diagnosis.

[0028] It is worth noting that during normal vehicle operation, the hydraulic pressure of the high-pressure and low-pressure chambers can be collected in real time by a pressure sensor installed in the hydraulic circuit. This pressure sensor is usually integrated into the electro-hydraulic pump assembly and can synchronously output the actual pressure value of the corresponding chamber.

[0029] In one embodiment, determining whether the pressure in the high-pressure chamber is abnormal includes: if the pressure in the high-pressure chamber is greater than or equal to a preset first pressure threshold, then the pressure in the high-pressure chamber is determined to be abnormal; if the pressure in the high-pressure chamber is less than the first pressure threshold, then the pressure in the high-pressure chamber is determined not to be abnormal; wherein, the first pressure threshold is M times the theoretical required pressure of the high-pressure chamber, and M is greater than 1.

[0030] The theoretical pressure requirement of the high-pressure chamber can be calculated based on the vehicle's current state, such as vehicle speed, steering wheel angle, vehicle acceleration, and the control objectives of the suspension system. Multiplying the theoretical pressure requirement of the high-pressure chamber by a coefficient M greater than 1 yields the first pressure threshold. M can be calibrated based on the system's pressure resistance, safety margin, and control accuracy; for example, it can be set to 1.5 to ensure timely identification of anomalies when the actual pressure in the high-pressure chamber reaches 1.5 times the theoretical pressure requirement, thus achieving a balance between ensuring normal system operation and safety.

[0031] Correspondingly, while determining whether there is an abnormality in the high-pressure chamber pressure, the abnormal state of the low-pressure chamber pressure can also be judged. Determining whether there is an abnormality in the low-pressure chamber pressure of the active suspension includes: if the low-pressure chamber pressure is greater than or equal to a preset second pressure threshold, then it is determined that the low-pressure chamber pressure is abnormal; if the low-pressure chamber pressure is less than the second pressure threshold, then it is determined that the low-pressure chamber pressure is not abnormal; wherein, the second pressure threshold is N times the initial static pressure of the low-pressure chamber system, and N is greater than M.

[0032] The initial static pressure of the low-pressure chamber is typically the baseline pressure of the low-pressure chamber when the suspension system is not operating and is in a static equilibrium state. It can serve as a benchmark reference for pressure assessment. N can be calibrated according to the design pressure range, sealing characteristics, and system reliability requirements of the low-pressure chamber. For example, it can be set to 3 to ensure that abnormal conditions can be effectively identified when the pressure in the low-pressure chamber reaches three times the initial static pressure.

[0033] It should be noted that since low-pressure chambers are usually used for system oil return and buffering, their pressure changes are more gradual than those of high-pressure chambers. Therefore, the coefficient N is generally greater than the coefficient M used in the abnormal judgment of high-pressure chambers, in order to adapt to the pressure characteristics of different chambers and improve the rationality and accuracy of the diagnosis.

[0034] Step S102: When the pressure in the high-pressure chamber or the pressure in the low-pressure chamber is abnormal, determine whether the pressure sensor is faulty.

[0035] Pressure sensor failures can include hardware or communication malfunctions, such as determining whether the detected signal is within a reasonable range, whether communication is interrupted, or whether there is an internal short circuit or open circuit.

[0036] Step S103: If the pressure sensor is faulty, record the corresponding first type of fault code and execute the first fault response.

[0037] Specifically, once a pressure sensor malfunction is detected, the system immediately records a Type I fault code related to "sensor malfunction" and "pressure anomaly." This Type I fault code indicates that the current fault belongs to a hardware-level failure mode, has a high priority, and typically does not depend on the number of pressure anomalies recorded. Simultaneously, the system triggers a first fault response. This response may include one or more of the following measures: illuminating the suspension system-related malfunction indicator light on the instrument panel to alert the driver; displaying specific fault information in the human-machine interface, prompting for inspection of the pressure sensor and related circuitry; and, where conditions permit, automatically limiting or downgrading some or all of the suspension system's active adjustment functions to prioritize driving safety and prevent further damage to the system hardware.

[0038] This first fault response design can prevent incorrect system adjustments based on erroneous signals when pressure sensor signals are distorted, thereby preventing control failures, performance degradation, or safety risks caused by sensor malfunctions.

[0039] Step S104: If the pressure sensor is not faulty, record the corresponding second type of fault code, count the cumulative number of the second type of fault code, and determine whether to execute the second fault response based on the cumulative number of times.

[0040] In one embodiment, determining whether to execute a second fault response based on the cumulative number of occurrences includes: comparing the cumulative number of occurrences with a preset number threshold; if the cumulative number of occurrences is greater than or equal to the number threshold, then executing the second fault response; if the cumulative number of occurrences is less than the number threshold, then not executing the second fault response.

[0041] It is worth noting that in this embodiment, in the determination mechanism, when the pressure sensor is fault-free, the system will not immediately trigger an alarm due to a single pressure anomaly. Instead, it records a second type of fault code indicating anomalies in the low-pressure or high-pressure chambers, accumulates the count, and compares the accumulated result with a preset count threshold. This count threshold can be calibrated based on system reliability requirements, road surface interference characteristics, and acceptable false alarm rates. If the accumulated count reaches or exceeds the threshold, it indicates that the abnormal phenomenon has a certain degree of persistence and can be determined as a potential fault, and a second fault response is immediately executed. If the accumulated count is below the threshold, it is considered that the current anomaly may only be an occasional interference, and a system-level fault response is not triggered temporarily, thereby significantly reducing the false alarm rate and improving the user experience of the system while ensuring timely early warning.

[0042] The second fault response includes at least one of illuminating the vehicle's fault indicator light, displaying fault information in the vehicle's human-machine interface, and issuing a voice fault prompt.

[0043] As a preferred implementation, determining whether to execute a second fault response based on the cumulative count further includes: when the pressure in the high-pressure chamber or low-pressure chamber is first determined to be abnormal, the system automatically initiates a statistical time window of duration T. Within this time window, the system continuously accumulates the count for each newly determined abnormal pressure in the high-pressure chamber or low-pressure chamber. If the cumulative count reaches or exceeds a preset threshold before the end of the time window, it is determined to be a persistent fault, and the second fault response is immediately executed. If the cumulative count is still less than the threshold until the end of the time window, the system determines that the abnormality in this stage is an occasional fluctuation and does not have fault characteristics, and the cumulative count is reset to zero. Subsequently, when the pressure in the high-pressure chamber or low-pressure chamber is again determined to be abnormal for the first time, the system will restart a new time window and begin accumulating again based on the new window, thereby achieving dynamic and sliding monitoring of the fault status. This mechanism effectively avoids false alarms caused by the improper accumulation of sporadic anomalies that occur at long intervals, while ensuring timely warnings of anomalies that occur frequently in a short period of time, thus achieving a good balance between reducing the false alarm rate and improving the sensitivity of fault identification.

[0044] In this embodiment, the alarm frequency threshold and time window can be calibrated and selected based on the suspension system design requirements, reliability targets, and acceptable false alarm rate. In this embodiment, the alarm frequency threshold is preferably 3, and the time window duration is 100ms.

[0045] In one specific embodiment, the process of the method for diagnosing and protecting against abnormal suspension system pressure includes: The vehicle is confirmed to be in normal driving condition, and all sensors and actuators of the fully active suspension system are free of fault codes and alarms. Each sensor collects data at a preset frequency, with the pressure sensor monitoring the pressure status of the high-pressure and low-pressure chambers corresponding to each wheel, providing raw data input for subsequent ECU control and fault diagnosis. The ECU calculates the required main force, damping force, and other control quantities at the wheel ends in real time according to the suspension control algorithm, and converts these control quantities into commands that the actuators can recognize, outputting solenoid valve current and motor speed respectively to achieve precise control of suspension stiffness and damping. After receiving the commands output by the ECU, the actuators and hydraulic pumps execute the corresponding current drive and speed drive respectively to realize the active control function of the suspension system.

[0046] The temperature and pressure sensors synchronously output the pressure and temperature of the high-pressure and low-pressure chambers. When the high-pressure chamber pressure is ≥ 150% of the theoretical required pressure, or ≥ 300% of the initial static pressure of the low-pressure chamber system: if the pressure sensor reports an error, the corresponding fault code is recorded and the malfunction indicator lamp is illuminated; if the pressure sensor reports an error, the corresponding fault code and the number of errors are recorded, and if the fault code appears consecutively ≥ 3 times within 100m, the malfunction indicator lamp is illuminated. By illuminating the malfunction indicator lamp, the driver is prompted to take the vehicle to a municipal repair center. After the vehicle is repaired and the fault is eliminated, and the vehicle can be driven normally and supports full operation of the suspension system, the above process is repeated for cyclic testing.

[0047] The suspension system pressure anomaly diagnosis and protection method provided in this embodiment collects road surface and vehicle body information in real time through a sensing module during vehicle dynamic driving. The control module then calculates and executes suspension adjustment commands based on this information. Simultaneously, the diagnostic module monitors and records the pressure in the high-pressure and low-pressure chambers in parallel, based on feedback signals from the wheel-end pressure sensors. When the pressure condition meets preset criteria, the system will report an error and illuminate a malfunction indicator lamp, prompting the driver to perform timely repairs. This provides early warning of the fault and prevents the vehicle from continuing to operate under abnormal system conditions.

[0048] This invention, while retaining and maintaining all the functions and performance of existing suspension systems, fundamentally improves the logic of pressure diagnosis. By refining diagnostic classifications and adding a mechanism for recording and diagnosing the frequency of pressure anomalies in high and low pressure chambers, the pressure protection strategy of the fully active suspension system is significantly optimized. By introducing cumulative frequency and time window judgment, false alarms of high-pressure chamber pressure anomalies are effectively suppressed; simultaneously, the ability to identify and control low-pressure chamber pressure anomalies is enhanced and improved, filling the gaps in existing diagnostic strategies in this area. This improves the driving experience and safety. Through early and accurate fault diagnosis, it effectively avoids a decline in vehicle comfort and handling caused by the system malfunctioning under latent fault conditions. More importantly, it prevents complete system failure caused by long-term accumulation of faults, thereby significantly reducing potential safety risks.

[0049] Secondly, embodiments of this application also provide a diagnostic and protective device for abnormal suspension system pressure.

[0050] In one embodiment, reference is made to Figure 4 , Figure 4 This is a functional module diagram of an embodiment of the diagnostic and protective device for abnormal suspension system pressure according to this application. Figure 4 As shown, the diagnostic and protective device for abnormal suspension system pressure includes: The first determining module is used to determine whether there are any abnormalities in the high-pressure chamber pressure and the low-pressure chamber pressure detected by the pressure sensor; The second determining module is used to determine whether the pressure sensor is faulty when there is an abnormality in the pressure of the high-pressure chamber or the pressure of the low-pressure chamber. The first response module is used to record the corresponding first type of fault code and execute the first fault response if the pressure sensor is faulty. The second response module is used to record the corresponding second type of fault code if the pressure sensor is not faulty, and to count the cumulative number of the second type of fault code, and to determine whether to execute the second fault response based on the cumulative number.

[0051] Furthermore, in one embodiment, the first determining module is further configured to: If the pressure in the high-pressure chamber is greater than or equal to a preset first pressure threshold, then it is determined that the pressure in the high-pressure chamber is abnormal. If the pressure in the high-pressure chamber is less than the first pressure threshold, then it is determined that the pressure in the high-pressure chamber is not abnormal. Wherein, the first pressure threshold is M times the theoretical required pressure of the high-pressure chamber, where M is greater than 1.

[0052] Furthermore, in one embodiment, the first determining module is further configured to: If the pressure in the low-pressure chamber is greater than or equal to a preset second pressure threshold, then it is determined that the pressure in the low-pressure chamber is abnormal. If the pressure in the low-pressure chamber is less than the second pressure threshold, then it is determined that the pressure in the low-pressure chamber is not abnormal. Wherein, the second pressure threshold is N times the initial static pressure of the low-pressure chamber system, where N is greater than M.

[0053] Furthermore, in one embodiment, the second response module is further configured to: Compare the cumulative number of times with a preset number of times threshold; If the cumulative number of times is greater than or equal to the number of times threshold, then the second fault response is executed; If the cumulative number of occurrences is less than the number threshold, the second fault response will not be executed.

[0054] Furthermore, in one embodiment, the second response module is further configured to: When the pressure in the high-pressure chamber or the low-pressure chamber is first determined to be abnormal, a statistical time window with a duration of T is initiated. If the cumulative number of times is greater than or equal to a preset threshold number of times before the end of the time window, then the second fault response is executed; If the cumulative count is less than the count threshold at the end of the time window, then the cumulative count is reset to zero; When the pressure in the high-pressure chamber or the low-pressure chamber is again determined to be abnormal, a new time window is restarted.

[0055] Further, in one embodiment, the first fault response and the second fault response include: The vehicle may illuminate its malfunction indicator light, display malfunction information on its human-machine interface, or issue a voice malfunction prompt.

[0056] Furthermore, in one embodiment, the first determining module is further configured to: It is confirmed that the vehicle is in normal driving condition, and that no fault codes are triggered in the sensors in the sensing module and the actuators in the execution module of the suspension system. The sensors in the perception module include a height sensor and a vehicle acceleration sensor, and the actuators in the execution module include a shock absorber, an energy storage device, and a hydraulic pump.

[0057] The functions of each module in the above-mentioned suspension system pressure abnormality diagnosis and protection device correspond to the steps in the above-mentioned suspension system pressure abnormality diagnosis and protection method embodiment, and their functions and implementation processes will not be described in detail here.

[0058] Thirdly, embodiments of this application provide a diagnostic and protection device for abnormal suspension system pressure. The diagnostic and protection device for abnormal suspension system pressure can be a vehicle controller, electronic control unit, on-board computer, or other device with data processing capabilities.

[0059] Reference Figure 5 , Figure 5 This is a schematic diagram of the hardware structure of the suspension system pressure anomaly diagnostic and protection device involved in the embodiments of this application. In the embodiments of this application, the suspension system pressure anomaly diagnostic and protection device may include a processor, a memory, a communication interface, and a communication bus.

[0060] The communication bus can be of any type and is used to interconnect the processor, memory, and communication interface.

[0061] The communication interface includes input / output (I / O) interfaces, physical interfaces, and logical interfaces used for interconnecting internal components of the diagnostic and protection device for suspension system pressure anomalies, as well as interfaces used for interconnecting the diagnostic and protection device for suspension system pressure anomalies with other devices (such as other computing devices or user equipment). Physical interfaces can be Ethernet interfaces, fiber optic interfaces, ATM interfaces, etc.; user equipment can be displays, keyboards, etc.

[0062] Memory can be various types of storage media, such as random access memory (RAM), read-only memory (ROM), non-volatile RAM (NVRAM), flash memory, optical storage, hard disk, programmable ROM (PROM), erasable PROM (EPROM), electrically erasable PROM (EEPROM), etc.

[0063] The processor can be a general-purpose processor, which can call the suspension system pressure anomaly diagnosis and protection program stored in the memory and execute the suspension system pressure anomaly diagnosis and protection method provided in the embodiments of this application. For example, the general-purpose processor can be a central processing unit (CPU). The method executed when the suspension system pressure anomaly diagnosis and protection program is called can be referred to the various embodiments of the suspension system pressure anomaly diagnosis and protection method of this application, and will not be repeated here.

[0064] Those skilled in the art will understand that Figure 5 The hardware structure shown does not constitute a limitation of this application and may include more or fewer components than shown, or combine certain components, or have different component arrangements.

[0065] Fourthly, embodiments of this application also provide a computer-readable storage medium.

[0066] The present application provides a computer-readable storage medium storing a diagnostic protection program for abnormal suspension system pressure, wherein when the diagnostic protection program for abnormal suspension system pressure is executed by a processor, it implements the steps of the diagnostic protection method for abnormal suspension system pressure as described above.

[0067] The method implemented when the diagnostic protection procedure for abnormal suspension system pressure is executed can be referred to in various embodiments of the diagnostic protection method for abnormal suspension system pressure of this application, and will not be repeated here.

[0068] It should be noted that the sequence numbers of the embodiments in this application are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments.

[0069] The terms "comprising" and "having," and any variations thereof, in the specification, claims, and accompanying drawings of this application are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or apparatus that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to such process, method, product, or apparatus. The terms "first," "second," and "third," etc., are used to distinguish different objects, etc., and do not indicate a sequence, nor do they limit "first," "second," and "third" to different types.

[0070] In the description of the embodiments of this application, terms such as "exemplary," "for example," or "for instance" are used to indicate examples, illustrations, or explanations. Any embodiment or design described as "exemplary," "for example," or "for instance" in the embodiments of this application should not be construed as being more preferred or advantageous than other embodiments or designs. Specifically, the use of terms such as "exemplary," "for example," or "for instance" is intended to present the relevant concepts in a concrete manner.

[0071] In the description of the embodiments of this application, unless otherwise stated, " / " means "or". For example, A / B can mean A or B. The "and / or" in the text is merely a description of the relationship between related objects, indicating that there can be three relationships. For example, A and / or B can mean: A exists alone, A and B exist simultaneously, and B exists alone. In addition, in the description of the embodiments of this application, "multiple" means two or more.

[0072] In some processes described in the embodiments of this application, multiple operations or steps are included in a specific order. However, it should be understood that these operations or steps may not be executed in the order they appear in the embodiments of this application, or they may be executed in parallel. The sequence number of the operation is only used to distinguish different operations, and the sequence number itself does not represent any execution order. In addition, these processes may include more or fewer operations, and these operations or steps may be executed sequentially or in parallel, and these operations or steps may be combined.

[0073] Through the above description of the embodiments, those skilled in the art can clearly understand that the methods of the above embodiments can be implemented by means of software plus necessary general-purpose hardware platforms. Of course, they can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk) as described above, and includes several instructions to cause a terminal device to execute the methods described in the various embodiments of this application.

[0074] The above are merely preferred embodiments of this application and do not limit the patent scope of this application. Any equivalent structural or procedural transformations made using the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this application.

Claims

1. A method for diagnosing and protecting against abnormal pressure in a suspension system, characterized in that, The diagnostic and protection methods for abnormal suspension system pressure include: Determine if there are any abnormalities in the high-pressure chamber pressure and low-pressure chamber pressure detected by the pressure sensor; When the pressure in the high-pressure chamber or the pressure in the low-pressure chamber is abnormal, determine whether the pressure sensor is faulty. If the pressure sensor malfunctions, the corresponding first type of fault code is recorded, and the first fault response is executed. If the pressure sensor is not faulty, the corresponding second type of fault code is recorded, the cumulative number of the second type of fault code is counted, and a second fault response is determined based on the cumulative number of counts.

2. The method for diagnosing and protecting against abnormal suspension system pressure as described in claim 1, characterized in that, Determining whether there is an abnormality in the pressure of the high-pressure chamber includes: If the pressure in the high-pressure chamber is greater than or equal to a preset first pressure threshold, then it is determined that the pressure in the high-pressure chamber is abnormal. If the pressure in the high-pressure chamber is less than the first pressure threshold, then it is determined that the pressure in the high-pressure chamber is not abnormal. Wherein, the first pressure threshold is M times the theoretical required pressure of the high-pressure chamber, where M is greater than 1.

3. The method for diagnosing and protecting against abnormal suspension system pressure as described in claim 2, characterized in that, Determine if there are any abnormalities in the low-pressure chamber pressure of the active suspension, including: If the pressure in the low-pressure chamber is greater than or equal to a preset second pressure threshold, then it is determined that the pressure in the low-pressure chamber is abnormal. If the pressure in the low-pressure chamber is less than the second pressure threshold, then it is determined that the pressure in the low-pressure chamber is not abnormal. Wherein, the second pressure threshold is N times the initial static pressure of the low-pressure chamber system, where N is greater than M.

4. The method for diagnosing and protecting against abnormal suspension system pressure as described in claim 1, characterized in that, Determining whether to execute a second fault response based on the cumulative number of occurrences includes: Compare the cumulative number of times with a preset number of times threshold; If the cumulative number of times is greater than or equal to the number of times threshold, then the second fault response is executed; If the cumulative number of occurrences is less than the number threshold, the second fault response will not be executed.

5. The method for diagnosing and protecting against abnormal suspension system pressure as described in claim 1, characterized in that, Determining whether to execute a second fault response based on the cumulative number of occurrences also includes: When the pressure in the high-pressure chamber or the low-pressure chamber is first determined to be abnormal, a statistical time window with a duration of T is initiated. If the cumulative number of times is greater than or equal to a preset threshold number of times before the end of the time window, then the second fault response is executed; If the cumulative count is less than the count threshold at the end of the time window, then the cumulative count is reset to zero; When the pressure in the high-pressure chamber or the low-pressure chamber is again determined to be abnormal, a new time window is restarted.

6. The method for diagnosing and protecting against abnormal pressure in a suspension system as described in claim 1, characterized in that, The first fault response and the second fault response include: The vehicle may illuminate its malfunction indicator light, display malfunction information on its human-machine interface, or issue a voice malfunction prompt.

7. The method for diagnosing and protecting against abnormal suspension system pressure as described in claim 1, characterized in that, Before determining whether there are any anomalies in the high-pressure chamber pressure and low-pressure chamber pressure detected by the pressure sensor, the following steps are also included: It is confirmed that the vehicle is in normal driving condition, and that no fault codes are triggered in the sensors in the sensing module and the actuators in the execution module of the suspension system. The sensors in the perception module include a height sensor and a vehicle acceleration sensor, and the actuators in the execution module include a shock absorber, an energy storage device, and a hydraulic pump.

8. A diagnostic and protective device for abnormal pressure in a suspension system, characterized in that, The diagnostic and protection device for abnormal suspension system pressure includes: The first determining module is used to determine whether there are any abnormalities in the high-pressure chamber pressure and the low-pressure chamber pressure detected by the pressure sensor; The second determining module is used to determine whether the pressure sensor is faulty when there is an abnormality in the pressure of the high-pressure chamber or the pressure of the low-pressure chamber. The first response module is used to record the corresponding first type of fault code and execute the first fault response if the pressure sensor is faulty. The second response module is used to record the corresponding second type of fault code if the pressure sensor is not faulty, and to count the cumulative number of the second type of fault code, and to determine whether to execute the second fault response based on the cumulative number.

9. A diagnostic and protective device for abnormal pressure in a suspension system, characterized in that, The suspension system pressure abnormality diagnosis and protection device includes a processor, a memory, and a suspension system pressure abnormality diagnosis and protection program stored in the memory and executable by the processor, wherein when the suspension system pressure abnormality diagnosis and protection program is executed by the processor, it implements the steps of the suspension system pressure abnormality diagnosis and protection method as described in any one of claims 1 to 7.

10. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a diagnostic protection program for abnormal suspension system pressure, wherein when the diagnostic protection program for abnormal suspension system pressure is executed by a processor, it implements the steps of the diagnostic protection method for abnormal suspension system pressure as described in any one of claims 1 to 7.

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