Turbocharger system, electric pressure regulating valve fault diagnosis method and device

Abstract

The present application provides a turbocharger system, an electrical pressure regulating valve fault diagnosis method and device, and belongs to the field of engines. The system includes: a high-pressure gas cylinder, an electromagnetic isolation valve, an electrical pressure regulating valve to be tested, a pressure sensor, and a controller, wherein the high-pressure gas cylinder is used to generate a high-pressure gas source, the electromagnetic isolation valve is installed in the pipeline between the outlet of the high-pressure gas cylinder and the electrical pressure regulating valve to be tested, the electromagnetic isolation valve is away from the electrical pressure regulating valve to be tested and close to the high-pressure gas cylinder; the pressure sensor is installed in the pipeline between the electromagnetic isolation valve and the electrical pressure regulating valve to be tested; the controller is electrically connected to the electromagnetic isolation valve and the pressure sensor, and is used to determine whether the electrical pressure regulating valve to be tested is faulty based on at least the state of the engine, the open and closed state of the electromagnetic isolation valve, and the pressure change value detected by the pressure sensor, and the state of the engine is either a shutdown state or a running state. This solution solves the problem of low efficiency in electrical pressure regulating valve fault diagnosis in the prior art.

Description

Technical Field

[0001] The present application relates to the field of engines, and in particular to a turbocharging system, an electric pressure regulating valve fault diagnosis method, an electric pressure regulating valve fault diagnosis device, and a computer-readable storage medium. Background Art

[0002] The electric pressure regulating valve is a key component in the turbocharging system of diesel (or gas) engines, primarily used to precisely control boost pressure to optimize engine performance, fuel economy, and emissions. The high-pressure gas in the high-pressure cylinder is modulated by the electric pressure regulating valve, which then controls the opening and closing of the turbocharger's bleed valve. The electric pressure regulating valve houses a solenoid valve, which the ECU adjusts to distribute the high-pressure gas between the working port and the exhaust to achieve the desired modulation. However, electric pressure regulating valves often malfunction, leading to leaks and, in turn, a series of vehicle failures.

[0003] Existing fault diagnosis of electric pressure regulating valves is mostly manual and relies on visual inspection, which cannot accurately detect the faults. Especially when the engine is running, various noises are mixed in, and the fault detection rate is extremely low. Summary of the Invention

[0004] The main purpose of this application is to provide a turbocharger system, an electric pressure regulating valve fault diagnosis method, an electric pressure regulating valve fault diagnosis device and a computer-readable storage medium, so as to at least solve the problem of low efficiency of electric pressure regulating valve fault diagnosis in the prior art.

[0005] In order to achieve the above-mentioned purpose, according to one aspect of the present application, a turbocharger system is provided, comprising: a high-pressure gas cylinder, an electromagnetic isolation valve, an electrical pressure-regulating valve to be tested, a pressure sensor and a controller, wherein the high-pressure gas cylinder is used to generate a high-pressure gas source, the electromagnetic isolation valve is installed on the pipeline between the outlet of the high-pressure gas cylinder and the electrical pressure-regulating valve to be tested, the electromagnetic isolation valve is away from the electrical pressure-regulating valve to be tested and close to the high-pressure gas cylinder; the pressure sensor is installed in the pipeline between the electromagnetic isolation valve and the electrical pressure-regulating valve to be tested; the controller is electrically connected to the electromagnetic isolation valve and the pressure sensor, and is used to determine whether the electrical pressure-regulating valve to be tested is faulty based on at least the state of the engine, the open and closed state of the electromagnetic isolation valve and the pressure change value detected by the pressure sensor, and the state of the engine is a shutdown state or a running state.

[0006] Optionally, the turbocharger system further includes a supercharger, and the supercharger is connected to the working port of the electrical pressure regulating valve to be tested.

[0007] According to another aspect of the present application, a method for diagnosing faults of an electric pressure regulating valve is provided, which is applied to a controller in the turbocharger system, and includes: determining whether the state of the engine is a shutdown state or a running state; when the engine is in the shutdown state, determining the leakage rate of the electric pressure regulating valve to be tested based on the opening and closing state of the electromagnetic isolation valve and the pressure change value detected by the pressure sensor, and determining a first fault diagnosis score according to the leakage rate of the electric pressure regulating valve to be tested; when the engine is in the running state, determining the pressure replenishment frequency deviation ratio based on the pressure replenishment frequency of the high-pressure gas cylinder, and determining a second fault diagnosis score according to the pressure replenishment frequency deviation ratio; based on the first fault diagnosis score and the second fault diagnosis score, determining whether the electric pressure regulating valve to be tested is faulty.

[0008] Optionally, when the engine is in the shutdown state, determining a leakage rate of the electric pressure regulating valve to be tested based on the open and closed state of the electromagnetic isolation valve and a pressure change value detected by the pressure sensor, and determining a first fault diagnosis score based on the leakage rate of the electric pressure regulating valve to be tested, includes: when the engine is in the shutdown state and the pressure of the high-pressure gas cylinder is greater than a preset pressure value, controlling the solenoid valve of the electric pressure regulating valve to be tested to close, and controlling the electromagnetic isolation valve to close after the solenoid valve of the electric pressure regulating valve to be tested has been closed for a first preset time period, wherein the pressure of the high-pressure gas cylinder is measured by a built-in pressure sensor installed inside the high-pressure gas cylinder, and the first preset time period is calibrated based on the volume of the pipeline between the electromagnetic isolation valve and the electric pressure regulating valve to be tested; monitoring the pressure value detected by the pressure sensor within a second preset time period, and calculating the leakage rate within the second preset time period based on the pressure value; and mapping the leakage rate to the first fault diagnosis score according to a first preset mapping rule, wherein the first preset mapping rule includes the leakage rate and the fault diagnosis score corresponding to the leakage rate, and the leakage rate and the fault diagnosis score corresponding to the leakage rate are negatively correlated.

[0009] Optionally, when the engine is in the running state, determining a pressure replenishment frequency deviation ratio based on the pressure replenishment frequency of the high-pressure gas cylinder, and determining a second fault diagnosis score according to the pressure replenishment frequency deviation ratio, including: when the engine is in the running state, obtaining the pressure replenishment frequency of the high-pressure gas cylinder in a third preset time period in real time; using the formula Calculate the pressure compensation frequency deviation ratio within the third preset time period, wherein: is the pressure compensation frequency deviation ratio, is the pressure replenishing frequency of the high-pressure gas cylinder within the third preset time period, The pressure replenishment frequency is predicted by the model; and the pressure replenishment frequency deviation ratio is mapped to the second fault diagnosis score according to a second preset mapping rule, wherein the second preset mapping rule includes the pressure replenishment frequency deviation ratio and the fault diagnosis score corresponding to the pressure replenishment frequency deviation ratio.

[0010] Alternatively, use the formula Calculate the pressure compensation frequency deviation ratio within the third preset time period, wherein: is the pressure compensation frequency deviation ratio, is the pressure replenishing frequency of the high-pressure gas cylinder within the third preset time period, Predict the recharge frequency for the model, including: using the formula The model predicts the pressure replenishment frequency, where: is the number of brakes, is the braking depth, is the ambient temperature, is the initial pressure of the high-pressure gas cylinder, 、 、 and It is a parameter determined based on actual tests and engineering experience.

[0011] Optionally, based on the first fault diagnosis score and the second fault diagnosis score, determining whether the electric pressure regulating valve to be tested is faulty includes: setting the weight of the first fault diagnosis score to a first weight, and setting the weight of the second fault diagnosis score to a second weight; using the formula The final fault diagnosis score of the electric pressure regulating valve to be tested is calculated, wherein: is the final fault diagnosis score, is the first fault diagnosis score, is the second fault diagnosis score, is the first weight, is the second weight, wherein the first weight is greater than the second weight; and determining whether the electrical pressure regulating valve to be tested is faulty according to the final fault diagnosis score.

[0012] Optionally, the method further includes: adjusting the first weight and the second weight in real time according to the ambient temperature, and increasing the first weight when the ambient temperature rises.

[0013] According to another aspect of the present application, an electric pressure regulating valve fault diagnosis device is provided, including: a first determination unit for determining whether the state of the engine is a shutdown state or a running state; a second determination unit for determining, when the engine is in the shutdown state, the leakage rate of the electric pressure regulating valve to be tested based on the opening and closing state of the electromagnetic isolation valve and the pressure change value detected by the pressure sensor, and determining a first fault diagnosis score according to the leakage rate of the electric pressure regulating valve to be tested; a third determination unit for determining, when the engine is in the running state, the pressure replenishment frequency deviation ratio based on the pressure replenishment frequency of the high-pressure gas cylinder, and determining a second fault diagnosis score according to the pressure replenishment frequency deviation ratio; a fourth determination unit for determining whether the electric pressure regulating valve to be tested is faulty based on the first fault diagnosis score and the second fault diagnosis score.

[0014] According to another aspect of the present application, a computer-readable storage medium is provided, which includes a stored program, wherein when the program is running, the device where the computer-readable storage medium is located is controlled to execute any one of the electric pressure regulating valve fault diagnosis methods.

[0015] The technical solution of this application comprises a turbocharger system comprising a high-pressure gas cylinder, an electromagnetic isolation valve, an electrical pressure regulating valve under test, a pressure sensor, and a controller. The high-pressure gas cylinder is used to generate a high-pressure gas source. The electromagnetic isolation valve is installed in the pipeline between the outlet of the high-pressure gas cylinder and the electrical pressure regulating valve under test, distal from the valve and proximal to the high-pressure gas cylinder. The pressure sensor is installed in the pipeline between the electromagnetic isolation valve and the electrical pressure regulating valve under test. The controller is electrically connected to the electromagnetic isolation valve and the pressure sensor and is configured to determine whether the electrical pressure regulating valve under test is faulty based on at least the engine status, the opening and closing status of the electromagnetic isolation valve, and the pressure change detected by the pressure sensor, where the engine is either shut down or running. In this solution, the electromagnetic isolation valve and pressure sensor are added to the gas circuit to accurately detect leaks in the electrical pressure regulating valve. Static diagnosis involves testing the electrical pressure regulating valve's sealing when the engine is shut down and assessing the leakage rate through a pressure decay test. Dynamic diagnosis involves monitoring the recharge frequency of the high-pressure gas cylinder and combining this with model prediction to determine the operating status of the electrical pressure regulating valve while the engine is running. Whether the electric pressure regulating valve is faulty is determined by combining static and dynamic diagnosis results, thereby solving the problem of low efficiency in fault diagnosis of the electric pressure regulating valve in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings that constitute part of this application are used to provide a further understanding of this application. The illustrative embodiments of this application and their descriptions are used to explain this application and do not constitute an improper limitation on this application. In the drawings:

[0017] Figure 1A schematic structural diagram of a turbocharging system provided in an embodiment of the present application is shown;

[0018] Figure 2 A schematic flow chart of a method for diagnosing a fault of an electric pressure regulating valve provided in accordance with an embodiment of the present application is shown;

[0019] Figure 3 A structural block diagram of an electric pressure regulating valve fault diagnosis device provided according to an embodiment of the present application is shown.

[0020] The above drawings include the following reference numerals:

[0021] 01. Turbocharger system; 10. High-pressure gas cylinder; 20. Solenoid isolation valve; 30. Electrical pressure regulating valve to be tested; 40. Pressure sensor; 50. Controller; 301. Solenoid valve; 60. Supercharger. DETAILED DESCRIPTION

[0022] It should be noted that the following detailed descriptions are illustrative and intended to provide further explanation of the present application. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which the present application belongs.

[0023] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof.

[0024] It should be understood that when an element (such as a layer, film, region, or substrate) is described as being “on” another element, the element may be directly on the other element or intervening elements may be present. Furthermore, in the specification and claims, when it is described that an element is “connected to” another element, the element may be “directly connected to” the other element or “connected to” the other element through a third element.

[0025] As introduced in the background technology, the fault diagnosis of electric pressure regulating valves in the prior art is mostly based on manual work and cannot be accurately detected. In particular, when the engine is running, various noises are mixed and the fault detection rate is extremely low. In order to solve the problem of low efficiency of fault diagnosis of electric pressure regulating valves in the prior art, the embodiments of the present application provide a turbocharger system, an electric pressure regulating valve fault diagnosis method, an electric pressure regulating valve fault diagnosis device and a computer-readable storage medium.

[0026] like Figure 1As shown, the turbocharger system 01 includes a high-pressure gas cylinder 10, an electromagnetic isolation valve 20, an electrical pressure regulating valve to be tested 30, a pressure sensor 40 and a controller 50, wherein the high-pressure gas cylinder 10 is used to generate a high-pressure gas source, and the electromagnetic isolation valve 20 is installed in the pipeline between the outlet of the high-pressure gas cylinder 10 and the electrical pressure regulating valve to be tested 30, and the electromagnetic isolation valve 20 is away from the electrical pressure regulating valve to be tested 30 and close to the high-pressure gas cylinder 10; the pressure sensor 40 is installed in the pipeline between the electromagnetic isolation valve 20 and the electrical pressure regulating valve to be tested 30; the controller 50 is electrically connected to the electromagnetic isolation valve 20 and the pressure sensor 40, and is used to determine whether the electrical pressure regulating valve to be tested 30 is faulty based on at least the state of the engine, the open and closed state of the electromagnetic isolation valve 20 and the pressure change value detected by the pressure sensor 40, and the state of the engine is a shutdown state or a running state.

[0027] Specifically, a high-pressure gas cylinder refers to a container used to store high-pressure gas in a turbocharger system, typically compressed air. As one of the key energy sources for the turbocharger system, the high-pressure gas cylinder provides the high-pressure gas (high-pressure gas source) that drives the boost process, which is crucial for optimizing engine performance, fuel economy, and emissions control. The electromagnetic isolation valve is installed in the pipeline between the outlet of the high-pressure gas cylinder and the electrical pressure regulating valve. Its position design places the electromagnetic isolation valve away from the electrical pressure regulating valve and close to the high-pressure gas cylinder. This arrangement facilitates the formation of a closed test area during fault diagnosis and facilitates the precise measurement of gas pressure changes. The function of the electromagnetic isolation valve is to open or close under the command of the controller, controlling the flow of high-pressure gas. This allows the electrical pressure regulating valve and other system components to be isolated during fault diagnosis, creating a stable environment for testing.

[0028] The electrical pressure-regulating valve under test regulates the pressure of high-pressure gas flowing from the cylinder to meet engine operating requirements. The health of the valve directly impacts the performance and safety of the entire system, necessitating accurate and effective fault diagnosis. A high-precision pressure sensor, installed in the pipeline between the electromagnetic isolation valve and the valve under test, monitors the pressure changes of the high-pressure gas within the pipeline in real time. During fault diagnosis, the pressure sensor data provides crucial information for determining whether the valve under test is leaking or malfunctioning.

[0029] The controller, through electrical connections to the electromagnetic isolation valve and pressure sensor, receives pressure data from the pressure sensor and controls the opening and closing of the electromagnetic isolation valve. The controller's core function is to diagnose faults in the electrical pressure regulating valve under test based on the engine's operating status (shutdown or running), the opening and closing status of the electromagnetic isolation valve, and the pressure changes detected by the pressure sensor. This means the controller can intelligently determine whether the electrical pressure regulating valve under test is experiencing a poor seal or leak.

[0030] By integrating these components, the turbocharger system can automatically diagnose faults in the electrical pressure regulating valve under test without manual intervention, significantly improving the turbocharger system's self-monitoring capabilities and maintenance management efficiency. The turbocharger system employs a combined dynamic and static fault diagnosis strategy. This strategy not only indirectly determines the status of the electrical pressure regulating valve under test by monitoring the pressure boost frequency while the engine is running, but also allows for direct leakage rate testing when the engine is shut down. This enables comprehensive fault diagnosis across all operating conditions, improving the accuracy and reliability of fault detection and addressing the low efficiency of electrical pressure regulating valve fault diagnosis in existing technologies.

[0031] Furthermore, if Figure 1 As shown, the turbocharger system 01 further includes a supercharger 60 , and the supercharger 60 is connected to the working port of the electrical pressure regulating valve 30 to be tested.

[0032] Specifically, in a turbocharger system, the working principle of the supercharger is to use the energy of the engine's exhaust gas to drive the turbine, which in turn drives a coaxial compressor to compress the air and send it into the engine's intake system, thereby increasing the intake pressure. This helps to increase the engine's output power and improve fuel efficiency. Superchargers are particularly common in heavy-duty commercial vehicles and high-performance cars. The electrical pressure regulating valve to be tested regulates the high-pressure gas pressure to ensure that the supercharger can operate stably and efficiently. The working port of the electrical pressure regulating valve to be tested is connected to the intake end of the supercharger. The electrical pressure regulating valve to be tested indirectly controls the supercharger's boost level by adjusting the pressure of the output gas, thereby optimizing engine performance.

[0033] The electrical pressure regulating valve under test plays a key role in regulating air pressure during the operation of the supercharger. The normal operation of the supercharger depends on the accurate operation of the electrical pressure regulating valve under test. This setting can accurately control the gas pressure entering the supercharger, thereby optimizing engine performance.

[0034] The present application also provides a method for diagnosing faults of an electric pressure regulating valve, which is applicable to any of the above-mentioned engine supercharging systems for regulating intake pressure. Figure 2 FIG. 1 is a flow chart of a method for diagnosing a fault of an electric pressure regulating valve according to an embodiment of the present application. Figure 2 As shown, the method includes the following steps:

[0035] Step S201, determining whether the engine is in a stopped state or a running state;

[0036] Specifically, it's necessary to first determine whether the engine is currently stationary (shutdown) or running (operating). This determination of the engine's state is crucial for implementing different fault diagnosis strategies, as electrical pressure regulating valve faults manifest differently in stationary and operating states. The engine's state is determined by engine speed; when the engine speed is 0 rpm, it's considered shut down.

[0037] By distinguishing the operating status of the engine, the pertinence and accuracy of fault diagnosis are improved, avoiding misjudgments or invalid results that may result from testing under inappropriate conditions. In particular, static testing is performed when the engine is shut down and the system is at rest. At this time, external interference is minimized, and the most accurate pressure change data can be obtained, effectively detecting whether the electrical pressure regulating valve has leakage problems. On the other hand, dynamic testing is performed when the engine is running and the system pressure changes frequently. It can monitor the dynamic performance of the electrical pressure regulating valve under test in real time and promptly detect signs of control failure or abnormal pressure replenishment. In short, by accurately judging the engine status, a key conditional basis is provided for fault diagnosis of the electrical pressure regulating valve under test in both the shut down and running states, ensuring the effectiveness of the test and the accuracy of the diagnosis. It is the key foundation for achieving intelligent and efficient fault detection in the entire fault diagnosis method.

[0038] Step S202, when the engine is in the shutdown state, determining a leakage rate of the electric pressure regulating valve to be tested based on the open / closed state of the electromagnetic isolation valve and the pressure change value detected by the pressure sensor, and determining a first fault diagnosis score based on the leakage rate of the electric pressure regulating valve to be tested;

[0039] Specifically, when the engine is shut down, the electromagnetic isolation valve is controlled to close, isolating the pipeline between the high-pressure gas cylinder and the electrical pressure regulating valve under test, creating a closed gas test environment. Pressure changes detected by the pressure sensor within this closed environment are then monitored. If the gas pressure drops within a certain period of time, this indicates a possible leak in the electrical pressure regulating valve under test. By calculating the leak rate (pressure change per unit time), the degree of leakage in the electrical pressure regulating valve under test can be quantified. A first fault diagnostic score is then determined based on the leak rate. This first fault diagnostic score reflects the fault status of the electrical pressure regulating valve under static conditions.

[0040] With the engine shut down, the leakage rate of the electrical pressure regulating valve under test is accurately determined by controlling the opening and closing of the electromagnetic isolation valve and monitoring the pressure change of the pressure sensor. This leakage rate is then converted into a first fault diagnosis score, which serves as the basis for fault diagnosis under static conditions. The key to this process is that the closing of the electromagnetic isolation valve creates a closed test environment, isolating it from external interference, and allowing for focused performance evaluation of the electrical pressure regulating valve under test. Furthermore, the use of a high-precision pressure sensor ensures accurate acquisition of pressure changes, providing reliable data support.

[0041] Step S203, when the engine is in the above-mentioned operating state, determining a pressure replenishment frequency deviation ratio based on the pressure replenishment frequency of the high-pressure gas cylinder, and determining a second fault diagnosis score according to the pressure replenishment frequency deviation ratio;

[0042] Specifically, when the engine is running, the electrical pressure regulating valve under test should function properly, controlling the pressure in the high-pressure gas cylinder to ensure stable supercharger operation. By monitoring the high-pressure gas cylinder's recharge frequency (i.e., the frequency at which the cylinder replenishes gas to the system) in real time and comparing it with a model-predicted recharge frequency based on vehicle operating parameters (such as braking frequency, braking depth, and ambient temperature), a recharge frequency deviation ratio can be calculated. This recharge frequency deviation ratio reveals the difference between actual and expected recharge pressure, indicating the performance of the electrical pressure regulating valve under dynamic conditions. A second fault diagnostic score is determined based on the recharge frequency deviation to evaluate the dynamic performance of the electrical pressure regulating valve under test.

[0043] While the engine is running, the pressure-replenishing frequency deviation ratio is determined through continuous monitoring and analysis of the high-pressure gas cylinder refill frequency, and converted into a second fault diagnosis score to measure the dynamic performance of the electric pressure regulating valve. This system can actively adapt to the dynamic environment during engine operation and evaluate the control efficiency and response speed of the electric pressure regulating valve under test in real time by comparing the actual refill frequency with the ideal refill frequency predicted based on operating parameters such as the number of brakes, brake depth, ambient temperature, and initial gas cylinder pressure. The introduction of this dynamic diagnostic method significantly improves the real-time performance and sensitivity of fault detection, especially in complex and changing operating environments. It can quickly capture subtle changes in the performance fluctuations of the electric pressure regulating valve under test, avoiding safety hazards and economic losses caused by the sudden failure of the electric pressure regulating valve.

[0044] Step S204 : determining whether the electrical pressure regulating valve to be tested is faulty based on the first fault diagnosis score and the second fault diagnosis score.

[0045] Specifically, the first fault diagnosis score (the leakage score under static conditions) is combined with the second fault diagnosis score (the pressure replenishment frequency deviation score under dynamic conditions) and a weighted summation is used to generate a comprehensive fault diagnosis score. This comprehensive score can be used to determine the overall health of the electric pressure regulating valve and whether a fault exists.

[0046] By comprehensively considering the fault diagnosis scores under both static and dynamic conditions and performing a weighted analysis, the health of the electrical pressure regulating valve under test is comprehensively assessed, accurately determining whether a fault exists. This process effectively combines fault information acquired under different operating conditions, ensuring the comprehensiveness and reliability of the diagnostic results. By comprehensively analyzing the first fault diagnosis score (the leakage rate score under static conditions) and the second fault diagnosis score (the pressure replenishment frequency deviation ratio score under dynamic conditions), a final fault diagnosis score is calculated based on pre-set weighting. This comprehensive evaluation mechanism overcomes the limitations of single tests, such as static tests that may overlook performance changes during dynamic operation and dynamic tests that may misjudge faults under static conditions. The final fault diagnosis score provides a comprehensive fault diagnosis based on the performance of the electrical pressure regulating valve under test in both shutdown and operating states.

[0047] This fault diagnosis method provides a comprehensive and intelligent fault detection solution by combining performance evaluations of the electrical pressure regulating valve under both static and dynamic conditions. Not only does it directly assess the sealing performance of the valve under test through pressure decay testing when the engine is shut down, but it also indirectly assesses the valve's control accuracy and overall efficiency through real-time monitoring and analysis of the pressure replenishment frequency while the engine is running. This method allows the turbocharger system to promptly identify potential problems with the valve under test, avoiding issues such as reduced engine performance, increased fuel consumption, and excessive emissions caused by valve failures, thereby ensuring system reliability and operational efficiency. This method also reduces reliance on manual maintenance and improves the automation and accuracy of fault diagnosis.

[0048] In a specific implementation process, when the engine is in the shutdown state, the leakage rate of the electric pressure regulating valve to be tested is determined based on the opening and closing state of the electromagnetic isolation valve and the pressure change value detected by the pressure sensor, and a first fault diagnosis score is determined according to the leakage rate of the electric pressure regulating valve to be tested, including: when the engine is in the shutdown state and the pressure of the high-pressure gas cylinder is greater than the preset pressure value, the electromagnetic valve of the electric pressure regulating valve to be tested is controlled to be closed, and after the electromagnetic valve of the electric pressure regulating valve to be tested is closed for a first preset time period, the electromagnetic isolation valve is controlled to be closed, wherein the pressure of the high-pressure gas cylinder is measured by the above-mentioned leakage rate. The built-in pressure sensor installed inside the high-pressure gas cylinder is measured, and the above-mentioned first preset time period is calibrated according to the pipeline volume between the above-mentioned electromagnetic isolation valve and the above-mentioned electrical pressure regulating valve to be tested; the pressure value detected by the above-mentioned pressure sensor in the second preset time period is monitored, and the above-mentioned leakage rate in the above-mentioned second preset time period is calculated based on the above-mentioned pressure value; according to the first preset mapping rule, the above-mentioned leakage rate is mapped to the above-mentioned first fault diagnosis score, wherein the above-mentioned first preset mapping rule includes the above-mentioned leakage rate and the fault diagnosis score corresponding to the above-mentioned leakage rate, and the above-mentioned leakage rate and the fault diagnosis score corresponding to the above-mentioned leakage rate are negatively correlated.

[0049] Specifically, when the engine is in a stopped state and the pressure of the high-pressure gas cylinder is greater than a preset pressure value, the solenoid valve 301 in the electric pressure regulating valve 30 to be tested is first closed (see Figure 1 ), followed by a delay (the first preset time period) before closing the solenoid isolation valve. This operation creates a closed test chamber between the high-pressure gas cylinder and the electrical pressure-regulating valve under test, where the gas volume (i.e., the gas in the pipeline volume) is fixed when the solenoid isolation valve is closed. Real-time monitoring of the pressure within the high-pressure gas cylinder by a built-in pressure sensor ensures that the test is conducted under appropriate conditions, namely, testing the sealing performance of the electrical pressure-regulating valve under high pressure. After the solenoid isolation valve is closed, a silent test phase (the second preset time period) begins, during which pressure change data fed back by the pressure sensor is continuously monitored. By comparing the pressure values ​​at the beginning and end of the test, the gas leakage rate during the second preset time period can be calculated. The leakage rate is a measure of the gas pressure drop per unit time and reflects the sealing condition of the electrical pressure-regulating valve under static conditions.

[0050] The calculated leakage rate is converted into a first fault diagnosis score according to a first preset mapping rule. The first preset mapping rule causes a smaller leakage rate to correspond to a higher first fault diagnosis score, while a larger leakage rate to correspond to a lower first fault diagnosis score. Calculation of the first fault diagnosis score provides a quantitative basis for subsequent fault alerts and maintenance decisions, and serves as a foundation for determining whether the electrical pressure regulating valve under test is faulty.

[0051] Through the above process, with the engine shut down, the static sealing performance of the electrical pressure regulating valve under test is tested by precisely controlling the electromagnetic isolation valve and the solenoid valve of the electrical pressure regulating valve under test, and utilizing data from the pressure sensor. This is then converted into a first fault diagnosis score. This process provides a scientific and accurate quantitative method for fault assessment of the electrical pressure regulating valve under test, and is a key static testing step in fault diagnosis. It helps detect leakage in the electrical pressure regulating valve under test under non-operating conditions, thus playing a vital role in system maintenance and troubleshooting.

[0052] In some embodiments of the present application, when the engine is in the above-mentioned operating state, determining a pressure replenishment frequency deviation ratio based on the pressure replenishment frequency of the high-pressure gas cylinder, and determining a second fault diagnosis score according to the pressure replenishment frequency deviation ratio include: when the engine is in the above-mentioned operating state, obtaining the pressure replenishment frequency of the high-pressure gas cylinder in a third preset time period in real time; using the formula Calculate the pressure compensation frequency deviation ratio within the third preset time period, where: is the above-mentioned pressure compensation frequency deviation ratio, is the pressure replenishing frequency of the high-pressure gas cylinder within the third preset time period, The model predicts the pressure replenishment frequency; according to the second preset mapping rule, the above-mentioned pressure replenishment frequency deviation ratio is mapped to the above-mentioned second fault diagnosis score, wherein the above-mentioned second preset mapping rule includes the above-mentioned pressure replenishment frequency deviation ratio and the fault diagnosis score corresponding to the above-mentioned pressure replenishment frequency deviation ratio.

[0053] Specifically, when the engine is running, the electrical pressure regulating valve under test is also in operation. Monitoring the recharge frequency of the high-pressure gas cylinder can indirectly assess the performance of the electrical pressure regulating valve under test. The recharge frequency refers to the number of times the high-pressure gas cylinder requires refilling within a third preset time period (e.g., minutes or hours). If the electrical pressure regulating valve under test experiences a leak or control failure, gas from the high-pressure gas cylinder will be frequently refilled to maintain system pressure, resulting in an increased recharge frequency. The recharge frequency deviation ratio is calculated by comparing the actual recharge frequency with the expected model-predicted recharge frequency. The recharge frequency deviation ratio reflects the difference between actual and expected operation and is a performance indicator for measuring the electrical pressure regulating valve under test. The model-predicted recharge frequency is calculated using a machine learning model or empirical formula based on parameters such as engine load, vehicle operating status, and environmental factors. It represents the recharge frequency of the high-pressure gas cylinder when the electrical pressure regulating valve under test is operating normally under specific conditions.

[0054] Specifically, the formula The pressure replenishment frequency predicted by the above model is calculated, where: is the number of brakes, is the braking depth, is the ambient temperature, is the initial pressure of the high-pressure gas cylinder, 、 、 and is a parameter determined based on actual tests and engineering experience. Through the above formula, the reasonable pressure replenishment frequency of the high-pressure gas cylinder can be dynamically predicted according to the real-time operating data during the operation of the vehicle, thereby laying a solid foundation for the subsequent comparative analysis with the actual pressure replenishment frequency. This embodiment significantly improves the intelligence and accuracy of fault diagnosis. First, it can adapt to the changes in the performance of the electric pressure regulating valve under different operating scenarios, and avoids the limitations of relying solely on static data or empirical values ​​by adjusting the predicted frequency in real time. Secondly, by incorporating complex operating parameters into the model, it can automatically identify abnormal behaviors in the process of controlling the high-pressure gas replenishment of the electric pressure regulating valve, and can issue early warnings even in the event of minor faults or early performance degradation. Finally, the parameters determined based on actual tests and engineering experience ensure the reliability and applicability of the model prediction, provide a more accurate reference benchmark for the calculation of subsequent fault diagnosis scores, and effectively avoid misdiagnosis and missed diagnosis.

[0055] After calculating the pressure-increasing frequency deviation ratio, the next step is to convert it into a fault diagnosis score, known as the second fault diagnosis score, using a second preset mapping rule. This second preset mapping rule converts the pressure-increasing frequency deviation ratio into a straightforward fault diagnosis score, reflecting the health of the electrical pressure regulating valve under dynamic operating conditions. Generally, a smaller deviation ratio indicates normal operation of the electrical pressure regulating valve, resulting in a higher corresponding fault diagnosis score; conversely, a larger deviation ratio indicates a potential fault in the valve, resulting in a lower corresponding fault diagnosis score.

[0056] In summary, the dynamic performance of the electrical pressure regulating valve under test is evaluated by monitoring the recharge frequency of the high-pressure gas cylinder and calculating the recharge frequency deviation ratio while the engine is running. By comparing actual operating data with the expected model, fault diagnosis of the electrical pressure regulating valve under test is performed dynamically and in real time, complementing static testing. By calculating the recharge frequency deviation ratio and mapping it to the fault diagnosis score, the operating status of the electrical pressure regulating valve under test can be monitored in real time. This is particularly useful in situations where direct physical inspection during engine operation is difficult. Data analysis can be used to indirectly evaluate the performance of the electrical pressure regulating valve under test, identify potential problems early, and improve system safety and reliability.

[0057] In some other embodiments of the present application, based on the first fault diagnosis score and the second fault diagnosis score, determining whether the electrical pressure regulating valve to be tested is faulty includes: setting the weight of the first fault diagnosis score to a first weight, and setting the weight of the second fault diagnosis score to a second weight; using the formula The final fault diagnosis score of the above-mentioned electric pressure regulating valve to be tested is calculated, where: is the final fault diagnosis score above, is the first fault diagnosis score mentioned above, is the second fault diagnosis score mentioned above, is the first weight mentioned above, is the second weight, wherein the first weight is greater than the second weight; and determining whether the electrical pressure regulating valve to be tested is faulty according to the final fault diagnosis score.

[0058] Specifically, in fault diagnosis of electric pressure regulating valves, leakage detected under static conditions (the first fault diagnosis score) often more directly reflects the valve's sealing performance than performance deviations during dynamic operation (the second fault diagnosis score). Therefore, the first weight is typically set higher than the second weight. This means that the score under static conditions has a greater impact on the comprehensive assessment of the health of the tested electric pressure regulating valve. This weighting considers the direct impact of static test results on driving safety and engine performance, ensuring the ability to prioritize critical failure modes. By weighting the average of the fault diagnosis scores under the two different conditions, the performance of the tested electric pressure regulating valve under both static and dynamic operating conditions is comprehensively considered to obtain a score (the final fault diagnosis score) that comprehensively reflects its health. By setting the first weight higher than the second weight, the importance of static test results is emphasized over dynamic test results, as leakage from the electric pressure regulating valve under static conditions can directly threaten driving safety and engine stability.

[0059] The final fault diagnosis score is calculated, and the pre-set scoring criteria are used to determine whether the electrical pressure regulating valve under test has experienced a fault. A fault threshold is typically set; if the final fault diagnosis score exceeds this threshold, the electrical pressure regulating valve under test is deemed to have a performance issue or fault and requires further inspection or maintenance. Conversely, if the final fault diagnosis score does not reach the fault threshold, the electrical pressure regulating valve under test is deemed to be operating normally. This fault determination mechanism, based on the final score, can quantitatively translate the health status of the electrical pressure regulating valve under test into an easy-to-understand and actionable signal, providing clear guidance to vehicle maintenance personnel. This improves maintenance efficiency, reduces downtime, and ensures safe vehicle operation and optimal engine performance.

[0060] Furthermore, the method further includes: adjusting the first weight and the second weight in real time according to the ambient temperature, and increasing the first weight when the ambient temperature rises.

[0061] Specifically, the performance of an electrical pressure regulating valve under test can be affected by ambient temperature. Especially in high-temperature environments, thermal expansion can exacerbate wear or deformation of sealing materials, leading to decreased sealing performance and an increased probability of leakage. Therefore, fault diagnosis of electrical pressure regulating valves under high-temperature conditions, particularly leak testing under static conditions, is particularly important. To account for these environmental changes, the design adjusts the first and second weights in real time based on the current ambient temperature to reflect the varying weights of the fault diagnosis scores under different conditions. When the ambient temperature rises, the weight of the first fault diagnosis score (static test result) is increased. This is because high temperatures can accelerate the aging and deformation of the sealing materials within the electrical pressure regulating valve under test, increasing the risk of seal failure. Under these conditions, static testing can more sensitively detect subtle leak changes, providing more direct information on the health of the electrical pressure regulating valve under test. By increasing the first weight, sealing performance is prioritized over dynamic performance evaluation in high-temperature environments, improving the accuracy and timeliness of fault diagnosis. This helps identify and address potential sealing issues early, preventing further damage to vehicles or machinery caused by high-temperature failures.

[0062] By dynamically adjusting the weight of the fault diagnosis score based on the ambient temperature, the environmental adaptability and reliability of the fault diagnosis method for electric pressure regulating valves are significantly enhanced. This ensures that in different operating environments, especially high-temperature conditions, the method can focus more on testing the sealing performance of the electric pressure regulating valve under test, promptly discovering and warning of potential faults, and reducing performance degradation or even failure caused by high temperatures.

[0063] To further improve the comprehensiveness and accuracy of fault diagnosis for electric pressure regulating valves, this embodiment introduces a multimodal fusion fault warning strategy. This strategy not only incorporates fault detection methods based on leakage rate and pressure compensation frequency deviation ratio, but also integrates multiple sensing methods such as sound recognition, vibration analysis, and temperature monitoring. Through multi-dimensional data fusion, a multimodal early warning strategy for electric pressure regulating valve faults is achieved. The sound recognition module utilizes advanced acoustic signal processing technology to monitor real-time acoustic changes in the electric pressure regulating valve and its surrounding area, identifying abnormal noises during operation, such as airflow. These abnormal noises may be early signs of seal failure or other mechanical problems. The vibration analysis module continuously monitors the vibration characteristics of the electric pressure regulating valve using a vibration sensor installed near the valve. Abnormal vibration patterns may indicate looseness or wear of internal components of the valve. Especially during dynamic operation, vibration analysis can provide additional information about the valve's structural integrity. The temperature monitoring module monitors the operating temperature of the valve itself in addition to ambient temperature. Abnormal increases or decreases in operating temperature may indicate poor heat exchange within the electric pressure regulating valve or a cooling system failure. These temperature fluctuations can affect the valve's performance and lifespan. A multimodal data fusion algorithm was developed to comprehensively analyze multiple data sources, including sound, vibration, temperature, leakage rate, and pressure-replenishing frequency deviation ratio. This algorithm identifies correlations between different modal data and integrates information from multiple sources, improving the sensitivity and accuracy of fault warnings.

[0064] This embodiment provides a more comprehensive and reliable method for detecting faults in electrical pressure regulating valves, leveraging a multimodal fusion fault warning strategy. This method not only leverages the results of fault diagnosis tests but also fully considers various abnormal signals during the operation of the electrical pressure regulating valve. This method can more accurately and earlier identify possible fault modes, providing maintenance personnel with timely warning information. This effectively prevents systemic risks caused by electrical pressure regulating valve failures and improves the operational safety and economic efficiency of the entire vehicle or mechanical equipment.

[0065] In order to enable those skilled in the art to more clearly understand the technical solution of the present application, the implementation process of the electric pressure regulating valve fault diagnosis method of the present application will be described in detail below in combination with specific embodiments.

[0066] This embodiment relates to a specific method for diagnosing faults in an electric pressure regulating valve. Specifically, the electric pressure regulating valve is a key component in a diesel (or gas) engine turbocharger system, primarily used to precisely control boost pressure to optimize engine performance, fuel economy, and emissions. The electric pressure regulating valve operates as follows: high-pressure gas (greater than 5 bar) in a high-pressure gas cylinder is modulated by the electric pressure regulating valve. The modulated high-pressure gas (within the range of 0-3 bar) controls the opening and closing of the turbocharger's bleed valve. The electric pressure regulating valve houses a solenoid valve, which regulates the valve to distribute the high-pressure gas between the working port and the exhaust port to achieve the desired modulation.

[0067] Install an electromagnetic isolation valve and a high-precision pressure sensor in the gas line. The electromagnetic isolation valve is installed between the high-pressure gas cylinder and the electric pressure regulating valve, away from the end of the electric pressure regulating valve (for example, the pipeline volume between the electromagnetic isolation valve and the electric pressure regulating valve is 2L) to leave enough space for inflation. The pressure sensor is installed in the pipeline between the electromagnetic isolation valve and the pressure regulating valve.

[0068] 1. Static judgment:

[0069] ① Determine whether the engine is in the shutdown state and whether the high-pressure gas cylinder pressure is greater than 5 bar. When the engine speed is 0 rpm, it is determined that the engine is in the shutdown state;

[0070] ②Send a control command to prioritize controlling the opening of the solenoid valve in the electric pressure regulating valve to 0%;

[0071] ③ After a certain delay (e.g. 3s, calibrable), the electromagnetic isolation valve is controlled to close to form an independent gas path (e.g. the volume between the electromagnetic isolation valve and the electric pressure regulating valve is 2L);

[0072] ④ Start the pressure decay test function to monitor the measurement change value (leakage rate) of the high-precision pressure sensor in real time;

[0073] ⑤ Linearly map the leakage rate to 0-100 minutes (0.1-0.5 bar / h corresponds to 100-0 minutes respectively).

[0074] Static judgment has poor real-time performance, but a higher detection rate.

[0075] 2. Dynamic judgment:

[0076] ① When the engine is running, real-time statistics of the re-pressurization frequency of the high-pressure gas cylinder and the model predicts the pressure replenishment frequency Make a comparison;

[0077] ② Calculate the deviation ratio of the pressure compensation frequency within a certain period of operation (pressure compensation frequency deviation ratio) ;

[0078] ③ Map the pressure compensation frequency deviation ratio to 0-100 points (0.1-0.5 corresponds to 100-0 points respectively);

[0079] ④Model prediction of pressure replenishment frequency Calculated based on parameters such as braking frequency and braking depth, for example: ,in, is the number of brakes, is the braking depth, is the ambient temperature, is the initial pressure of the high-pressure gas cylinder, 、 、 and It is a parameter determined based on actual tests and engineering experience.

[0080] Dynamic judgment has good real-time performance, but the detection rate is low (there are many interference factors and poor model accuracy).

[0081] 3. Final fault diagnosis score and weight distribution:

[0082] ①Final fault diagnosis score = static score* +Dynamic Scoring* ,The detection rate of static leaks is high and directly affects driving safety, and requires a higher weight to ensure timely alarms, e.g. , where the static score is the first fault diagnosis score, and the dynamic score is the second fault diagnosis score. is the first weight, is the second weight;

[0083] ②Weight coefficient adjustment: If the ambient temperature is high (seal thermal expansion increases, static detection is more sensitive), the first weight can be increased in real time ;

[0084] ③ The final fault diagnosis score is graded and an error warning is issued. The warning levels are shown in Table 1.

[0085] Table 1 Warning Levels

[0086]

[0087] To enhance the foresight and intelligence of fault diagnosis for electric pressure regulating valves, this embodiment utilizes artificial intelligence (AI)-based learning-based fault prediction. Leveraging historical operating data and fault records, a predictive model for electric pressure regulating valve performance degradation is established using machine learning algorithms, such as neural networks, support vector machines, or random forests. This model can identify various early warning signals associated with electric pressure regulating valve failures, including small fluctuations in operating pressure, abnormal increases in power consumption, changes in operating cycle, and interactions with environmental factors such as temperature and humidity. Electric pressure regulating valve operating data, including operating time, pressure fluctuations, and power consumption, is regularly collected from the engine ECU, environmental sensors, and other on-board sensors. This data is preprocessed to remove noise and irrelevant information. Through data analysis, characteristic variables closely related to electric pressure regulating valve performance are extracted and used as input parameters for the fault prediction model. These characteristics include the operating frequency and duration of the electric pressure regulating valve, ambient temperature, air humidity, and oil quality. The model is trained using labeled fault data, enabling it to learn patterns of electric pressure regulating valve failures from complex input data. Subsequently, through cross-validation and field testing, the model's prediction accuracy was continuously optimized to ensure high accuracy under various operating conditions. Once the model was trained and deployed, it could monitor the operating status of the electric pressure regulating valve in real time. By comparing current data with the model's predictions, it could provide early warnings of potential failures. Warning levels could be graded based on the predicted probability, providing maintenance teams with opportunities for early intervention and preventive maintenance.

[0088] By implementing AI-based learning-based fault prediction, predictive diagnosis of electric pressure regulating valve faults can be performed, allowing measures to be taken before a fault occurs. This not only reduces the risk of sudden failures, but also extends the service life of the electric pressure regulating valve, reduces maintenance costs, and improves the overall operating efficiency of the equipment.

[0089] The embodiments of the present application also provide an electric pressure regulating valve fault diagnosis device. It should be noted that the electric pressure regulating valve fault diagnosis device of the embodiments of the present application can be used to execute the electric pressure regulating valve fault diagnosis method provided by the embodiments of the present application. The device is used to implement the above-mentioned embodiments and preferred implementation methods, and the details that have been explained will not be repeated. As used below, the term "module" can be a combination of software and / or hardware that implements a predetermined function. Although the devices described in the following embodiments are preferably implemented in software, implementation in hardware, or a combination of software and hardware, is also possible and conceivable.

[0090] The following introduces the electrical pressure regulating valve fault diagnosis device provided in the embodiment of the present application.

[0091] Figure 3 FIG. 1 is a structural block diagram of an electric pressure regulating valve fault diagnosis device according to an embodiment of the present application. Figure 3 As shown, the apparatus includes a first determining unit 100, a second determining unit 200, a third determining unit 300, and a fourth determining unit 400. The first determining unit is configured to determine whether the engine is in a shutdown state or a running state; the second determining unit is configured to, when the engine is in the shutdown state, determine the leakage rate of the electric pressure regulating valve under test based on the open / close state of the electromagnetic isolation valve and the pressure change value detected by the pressure sensor, and to determine a first fault diagnosis score based on the leakage rate of the electric pressure regulating valve under test; the third determining unit is configured to, when the engine is in the running state, determine the pressure replenishment frequency deviation ratio based on the pressure replenishment frequency of the high-pressure gas cylinder, and to determine a second fault diagnosis score based on the pressure replenishment frequency deviation ratio; and the fourth determining unit is configured to determine whether the electric pressure regulating valve under test is faulty based on the first and second fault diagnosis scores.

[0092] By combining performance evaluations of the electrical pressure regulating valve under test (PTV) under both static and dynamic conditions, a comprehensive and intelligent fault detection solution is provided. Not only is the sealing performance of the PTV directly assessed through pressure decay testing when the engine is shut down, but the control accuracy and overall efficiency of the PTV are also indirectly assessed through real-time monitoring and analysis of the pressure replenishment frequency while the engine is running. This approach allows the turbocharger system to promptly identify potential problems with the PTV, avoiding issues such as reduced engine performance, increased fuel consumption, and excessive emissions caused by PTV failures, thereby ensuring system reliability and operational efficiency. This approach also reduces reliance on manual maintenance and improves the automation and accuracy of fault diagnosis.

[0093] In a specific implementation, the second determination unit includes a control module, a first calculation module, and a first mapping module. The control module is configured to control the solenoid valve of the electric pressure regulating valve under test to close when the engine is in the shutdown state and the pressure of the high-pressure gas cylinder is greater than a preset pressure value, and to control the electromagnetic isolation valve to close after the solenoid valve of the electric pressure regulating valve under test has been closed for a first preset time period, wherein the pressure of the high-pressure gas cylinder is measured by a built-in pressure sensor installed inside the high-pressure gas cylinder, and the first preset time period is calibrated based on the volume of the pipeline between the electromagnetic isolation valve and the electric pressure regulating valve under test; the first calculation module is configured to monitor the pressure value detected by the pressure sensor within a second preset time period and calculate the leakage rate within the second preset time period based on the pressure value; and the first mapping module is configured to map the leakage rate to the first fault diagnosis score according to a first preset mapping rule, wherein the first preset mapping rule includes the leakage rate and the fault diagnosis score corresponding to the leakage rate, and the leakage rate and the fault diagnosis score corresponding to the leakage rate are negatively correlated.

[0094] With the engine shut down, the static sealing performance of the electrical pressure regulating valve under test is tested by precisely controlling the electromagnetic isolation valve and the solenoid valve of the tested electrical pressure regulating valve, and the data from the pressure sensor is used to convert the performance into a first fault diagnosis score. This process provides a scientific and accurate quantitative method for fault assessment of the tested electrical pressure regulating valve. It is a key static test step in the fault diagnosis method and helps detect leakage in the tested electrical pressure regulating valve under non-operating conditions, thus playing a vital role in system maintenance and troubleshooting.

[0095] In some embodiments of the present application, the third determination unit includes an acquisition module, a second calculation module, and a second mapping module. The acquisition module is used to obtain the pressure replenishment frequency of the high-pressure gas cylinder in a third preset time period in real time when the engine is in the above-mentioned operating state; the second calculation module is used to use the formula Calculate the pressure compensation frequency deviation ratio within the third preset time period, where: is the above-mentioned pressure compensation frequency deviation ratio, is the pressure replenishing frequency of the high-pressure gas cylinder within the third preset time period, The model predicts the pressure replenishment frequency; the second mapping module is used to map the above-mentioned pressure replenishment frequency deviation ratio to the above-mentioned second fault diagnosis score according to the second preset mapping rule, wherein the above-mentioned second preset mapping rule includes the above-mentioned pressure replenishment frequency deviation ratio and the fault diagnosis score corresponding to the above-mentioned pressure replenishment frequency deviation ratio.

[0096] The second calculation module includes a calculation submodule for using the formula The pressure replenishment frequency predicted by the above model is calculated, where: is the number of brakes, is the braking depth, is the ambient temperature, is the initial pressure of the high-pressure gas cylinder, 、 、 and is a parameter determined based on actual tests and engineering experience. Through the above formula, the reasonable pressure replenishment frequency of the high-pressure gas cylinder can be dynamically predicted according to the real-time operating data during the operation of the vehicle, thereby laying a solid foundation for the subsequent comparative analysis with the actual pressure replenishment frequency. This embodiment significantly improves the intelligence and accuracy of fault diagnosis. First, it can adapt to the changes in the performance of the electric pressure regulating valve under different operating scenarios, and avoids the limitations of relying solely on static data or empirical values ​​by adjusting the predicted frequency in real time. Secondly, by incorporating complex operating parameters into the model, it can automatically identify abnormal behaviors in the process of controlling the high-pressure gas replenishment of the electric pressure regulating valve, and can issue early warnings even in the event of minor faults or early performance degradation. Finally, the parameters determined based on actual tests and engineering experience ensure the reliability and applicability of the model prediction, provide a more accurate reference benchmark for the calculation of subsequent fault diagnosis scores, and effectively avoid misdiagnosis and missed diagnosis.

[0097] In summary, the dynamic performance of the electrical pressure regulating valve under test is evaluated by monitoring the recharge frequency of the high-pressure gas cylinder and calculating the recharge frequency deviation ratio while the engine is running. By comparing actual operating data with the expected model, fault diagnosis of the electrical pressure regulating valve under test is performed dynamically and in real time, complementing static testing. By calculating the recharge frequency deviation ratio and mapping it to the fault diagnosis score, the operating status of the electrical pressure regulating valve under test can be monitored in real time. This is particularly useful in situations where direct physical inspection during engine operation is difficult. Data analysis can be used to indirectly evaluate the performance of the electrical pressure regulating valve under test, identify potential problems early, and improve system safety and reliability.

[0098] In some other embodiments of the present application, the fourth determination unit includes a setting module, a third calculation module, and a determination module. The setting module is used to set the weight of the first fault diagnosis score to the first weight, and the weight of the second fault diagnosis score to the second weight; the third calculation module is used to use the formula The final fault diagnosis score of the above-mentioned electric pressure regulating valve to be tested is calculated, where: is the final fault diagnosis score above, is the first fault diagnosis score mentioned above, is the second fault diagnosis score mentioned above, is the first weight mentioned above, is the second weight, wherein the first weight is greater than the second weight; the determination module is used to determine whether the electrical pressure regulating valve to be tested is faulty according to the final fault diagnosis score.

[0099] The final fault diagnosis score is calculated, and the pre-set scoring criteria are used to determine whether the electrical pressure regulating valve under test has experienced a fault. A fault threshold is usually set; if the final fault diagnosis score exceeds this threshold, the electrical pressure regulating valve under test is deemed to have a performance issue or fault and requires further inspection or maintenance. Conversely, if the final fault diagnosis score does not reach the fault threshold, the electrical pressure regulating valve under test is deemed to be operating normally. This fault determination mechanism based on the final score can quantitatively convert the health status of the electrical pressure regulating valve under test into an easy-to-understand and actionable signal, providing clear guidance for vehicle or machinery maintenance personnel, thereby improving maintenance efficiency, reducing downtime, and ensuring safe vehicle operation and optimal engine performance.

[0100] Furthermore, the apparatus further includes an adjusting unit for adjusting the first weight and the second weight in real time according to the ambient temperature, and increasing the first weight when the ambient temperature rises.

[0101] By dynamically adjusting the weight of the fault diagnosis score based on the ambient temperature, the environmental adaptability and reliability of the fault diagnosis method for electric pressure regulating valves are significantly enhanced. This ensures that in different operating environments, especially high-temperature conditions, the method can focus more on testing the sealing performance of the electric pressure regulating valve under test, promptly discovering and warning of potential faults, and reducing performance degradation or even failure caused by high temperatures.

[0102] The above-mentioned electric pressure regulating valve fault diagnosis device includes a processor and a memory. The first determination unit, the second determination unit, the third determination unit, the fourth determination unit, and the like are all stored as program units in the memory. The processor executes the program units stored in the memory to implement the corresponding functions. The above-mentioned modules are all located in the same processor; alternatively, the above-mentioned modules can be located in different processors in any combination.

[0103] The memory may include non-permanent memory in a computer-readable medium, random access memory (RAM) and / or non-volatile memory, such as read-only memory (ROM) or flash RAM, and the memory includes at least one memory chip.

[0104] An embodiment of the present invention provides a computer-readable storage medium, which includes a stored program. When the program is executed, the device where the computer-readable storage medium is located is controlled to execute the electric pressure regulating valve fault diagnosis method.

[0105] An embodiment of the present invention provides a processor, which is used to run a program, wherein the electric pressure regulating valve fault diagnosis method is executed when the program is run.

[0106] An embodiment of the present invention provides an electronic device comprising a processor, a memory, and a program stored in the memory and executable on the processor. When the processor executes the program, it implements the steps of the above-described method for diagnosing faults in an electric pressure regulating valve. The device herein may be a server, a PC, a PAD, a mobile phone, or the like.

[0107] The present application also provides a computer program product, which, when executed on a data processing device, is suitable for executing a program that initializes the steps of the above-mentioned electric pressure regulating valve fault diagnosis method.

[0108] Obviously, those skilled in the art will appreciate that the various modules or steps of the present invention described above can be implemented using a general-purpose computing device, can be centralized on a single computing device, or can be distributed across a network of multiple computing devices. They can be implemented using program code executable by the computing device, and thus, can be stored in a storage device and executed by the computing device. In some cases, the steps shown or described herein can be performed in a different order than that shown, or can be fabricated as separate integrated circuit modules, or multiple modules or steps can be fabricated as a single integrated circuit module. Thus, the present invention is not limited to any particular combination of hardware and software.

[0109] Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, systems, or computer program products. Therefore, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware. Furthermore, the present application may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to magnetic disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0110] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process and / or block in the flowchart and / or block diagram, as well as the combination of processes and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 a process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0111] These computer program instructions may also be stored in a computer readable memory that can direct a computer or other programmable data processing device to work in a specific manner, so that the instructions stored in the computer readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 a process or multiple processes and / or boxes Figure 1 The function specified in one or more boxes.

[0112] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operational steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing the instructions executed on the computer or other programmable device for implementing the process. Figure 1 a process or multiple processes and / or boxes Figure 1 A step that specifies a function in one or more boxes.

[0113] In a typical configuration, a computing device includes one or more processors (CPUs), input / output interfaces, network interfaces, and memory.

[0114] The memory may include non-permanent memory in a computer-readable medium, random access memory (RAM) and / or non-volatile memory in the form of read-only memory (ROM) or flash RAM. The memory is an example of a computer-readable medium.

[0115] Computer-readable media includes both permanent and non-permanent, removable and non-removable media that can implement information storage using any method or technology. Information can be computer-readable instructions, data structures, program modules, or other data. Examples of computer storage media include, but are not limited to, phase-change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technologies, compact disc read-only memory (CD-ROM), digital versatile disc (DVD) or other optical storage, magnetic cassettes or other magnetic storage devices, or any other non-transmission media that can be used to store information that can be accessed by a computing device. As defined herein, computer-readable media does not include transitory computer-readable media such as modulated data signals and carrier waves.

[0116] It should also be noted that the terms "comprises," "includes," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, method, commodity, or apparatus that includes a series of elements includes not only those elements but also other elements not explicitly listed, or includes elements inherent to such process, method, commodity, or apparatus. In the absence of further limitations, an element defined by the phrase "comprises a ..." does not exclude the presence of other identical elements in the process, method, commodity, or apparatus that includes the element.

[0117] The foregoing description is merely a preferred embodiment of the present application and is not intended to limit the present application. Persons skilled in the art will readily appreciate that various modifications and variations are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present application shall be included within the scope of protection of the present application.

Claims

1. A fault diagnosis method for an electric pressure regulating valve in a turbocharger system, characterized in that: include: Determine whether the engine is in a stopped state or in a running state; When the engine is in the shutdown state, determining a leakage rate of the electric pressure regulating valve to be tested based on the open / closed state of the electromagnetic isolation valve and the pressure change value detected by the pressure sensor, and determining a first fault diagnosis score according to the leakage rate of the electric pressure regulating valve to be tested; When the engine is in the operating state, determining a pressure replenishment frequency deviation ratio based on the pressure replenishment frequency of the high-pressure gas cylinder, and determining a second fault diagnosis score according to the pressure replenishment frequency deviation ratio; determining whether the electric pressure regulating valve to be tested is faulty based on the first fault diagnosis score and the second fault diagnosis score; The turbocharger system includes the high-pressure gas cylinder, the electromagnetic isolation valve, the electric pressure regulating valve to be tested, the pressure sensor, and a controller, wherein the high-pressure gas cylinder is used to generate a high-pressure gas source, the electromagnetic isolation valve is installed in the pipeline between the outlet of the high-pressure gas cylinder and the electric pressure regulating valve to be tested, the electromagnetic isolation valve is away from the electric pressure regulating valve to be tested and close to the high-pressure gas cylinder; the pressure sensor is installed in the pipeline between the electromagnetic isolation valve and the electric pressure regulating valve to be tested; The controller is electrically connected to the electromagnetic isolation valve and the pressure sensor, and is used to determine whether the electrical pressure regulating valve to be tested is faulty based at least on the state of the engine, the open and closed state of the electromagnetic isolation valve, and the pressure change value detected by the pressure sensor, and the state of the engine is either a shutdown state or a running state.

2. The method according to claim 1, characterized in that When the engine is in the shutdown state, determining a leakage rate of the electric pressure regulating valve to be tested based on the open / closed state of the electromagnetic isolation valve and a pressure change value detected by a pressure sensor, and determining a first fault diagnosis score according to the leakage rate of the electric pressure regulating valve to be tested, including: When the engine is in the shutdown state and the pressure of the high-pressure gas cylinder is greater than a preset pressure value, controlling the solenoid valve of the electrical pressure regulating valve to be tested to close, and controlling the electromagnetic isolation valve to close after the solenoid valve of the electrical pressure regulating valve to be tested is closed for a first preset time period, wherein the pressure of the high-pressure gas cylinder is measured by a built-in pressure sensor installed inside the high-pressure gas cylinder, and the first preset time period is calibrated according to the volume of the pipeline between the electromagnetic isolation valve and the electrical pressure regulating valve to be tested; monitoring the pressure value detected by the pressure sensor within a second preset time period, and calculating the leakage rate within the second preset time period based on the pressure value; According to a first preset mapping rule, the leakage rate is mapped to the first fault diagnosis score, wherein the first preset mapping rule includes the leakage rate and the fault diagnosis score corresponding to the leakage rate, and the leakage rate and the fault diagnosis score corresponding to the leakage rate are negatively correlated.

3. The method according to claim 1, characterized in that When the engine is in the operating state, determining a pressure replenishment frequency deviation ratio based on the pressure replenishment frequency of the high-pressure gas cylinder, and determining a second fault diagnosis score according to the pressure replenishment frequency deviation ratio, includes: When the engine is in the running state, obtaining in real time the pressure replenishment frequency of the high-pressure gas cylinder within a third preset time period; Using the formula Calculate the pressure compensation frequency deviation ratio within the third preset time period, wherein: is the pressure compensation frequency deviation ratio, is the pressure replenishing frequency of the high-pressure gas cylinder within the third preset time period, Predict the recharge frequency for the model; The pressure boosting frequency deviation ratio is mapped to the second fault diagnosis score according to a second preset mapping rule, wherein the second preset mapping rule includes the pressure boosting frequency deviation ratio and the fault diagnosis score corresponding to the pressure boosting frequency deviation ratio.

4. The method according to claim 3, characterized in that Using the formula Calculate the pressure compensation frequency deviation ratio within the third preset time period, wherein: is the pressure compensation frequency deviation ratio, is the pressure replenishing frequency of the high-pressure gas cylinder within the third preset time period, Predict recharge frequency for the model, including: Using the formula The model predicts the pressure replenishment frequency, where: is the number of brakes, is the braking depth, is the ambient temperature, is the initial pressure of the high-pressure gas cylinder, 、 、 and It is a parameter determined based on actual tests and engineering experience.

5. The method according to claim 1, characterized in that Determining whether the electric pressure regulating valve to be tested is faulty based on the first fault diagnosis score and the second fault diagnosis score includes: setting the weight of the first fault diagnosis score to a first weight, and setting the weight of the second fault diagnosis score to a second weight; Using the formula The final fault diagnosis score of the electric pressure regulating valve to be tested is calculated, wherein: is the final fault diagnosis score, is the first fault diagnosis score, is the second fault diagnosis score, is the first weight, is the second weight, wherein the first weight is greater than the second weight; It is determined whether the electric pressure regulating valve to be tested is faulty according to the final fault diagnosis score.

6. The method according to claim 5, characterized in that The method further comprises: The first weight and the second weight are adjusted in real time according to the ambient temperature. When the ambient temperature rises, the first weight is increased.

7. A fault diagnosis device for an electric pressure regulating valve in a turbocharger system, characterized in that: The turbocharging system includes a high-pressure gas cylinder, an electromagnetic isolation valve, an electric pressure regulating valve to be tested, a pressure sensor and a controller, wherein the high-pressure gas cylinder is used to generate a high-pressure gas source, the electromagnetic isolation valve is installed in the pipeline between the outlet of the high-pressure gas cylinder and the electric pressure regulating valve to be tested, the electromagnetic isolation valve is away from the electric pressure regulating valve to be tested and close to the high-pressure gas cylinder; the pressure sensor is installed in the pipeline between the electromagnetic isolation valve and the electric pressure regulating valve to be tested; the controller is electrically connected to the electromagnetic isolation valve and the pressure sensor, and is used to determine whether the electric pressure regulating valve to be tested is faulty based on at least the state of the engine, the open and closed state of the electromagnetic isolation valve and the pressure change value detected by the pressure sensor, the state of the engine being a shutdown state or a running state. The electric pressure regulating valve fault diagnosis device applied to the turbocharging system includes: a first determining unit, configured to determine whether the state of the engine is a shutdown state or a running state; a second determining unit, configured to determine, when the engine is in the shutdown state, a leakage rate of the electric pressure regulating valve to be tested based on the open / closed state of the electromagnetic isolation valve and the pressure change value detected by the pressure sensor, and determine a first fault diagnosis score according to the leakage rate of the electric pressure regulating valve to be tested; a third determining unit, configured to determine a pressure replenishment frequency deviation ratio based on the pressure replenishment frequency of the high-pressure gas cylinder when the engine is in the operating state, and determine a second fault diagnosis score according to the pressure replenishment frequency deviation ratio; The fourth determining unit is configured to determine whether the electric pressure regulating valve to be tested is faulty based on the first fault diagnosis score and the second fault diagnosis score.

8. A computer-readable storage medium, characterized in that The computer-readable storage medium includes a stored program, wherein when the program is running, the device where the computer-readable storage medium is located is controlled to execute the electric pressure regulating valve fault diagnosis method applied to the turbocharger system according to any one of claims 1 to 6.

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