Method and device for diagnosing rationality of supercharged engine supercharging capacity

Abstract

The present invention relates to a method and device for diagnosing the rationality of the boosting capacity of a supercharged engine. The method comprises: determining a standard threshold value for the opening of a supercharged actuator; obtaining an average value of the actual opening of the supercharged actuator under the current operating conditions; and comparing the difference between the average actual opening of the supercharged actuator and the standard threshold value for the opening of the supercharged actuator under the same operating conditions to determine whether a supercharge rationality fault has occurred. Without affecting normal engine control, the present invention identifies the impact of factors such as ignition efficiency on the opening of the supercharged actuator and updates the threshold value for the opening of the supercharged actuator. Furthermore, as the engine life cycle progresses and the supercharged system ages, the present invention updates the differences in determining supercharged system faults in real time, identifies whether the supercharged system capacity is abnormal, and performs repairs as soon as possible when problems occur, thereby reducing the impact on engine power and economy.

Description

Technical Field

[0001] The present invention relates to the field of engine control, and more particularly to a method and device for diagnosing the rationality of supercharging capability of a supercharged engine. Background Art

[0002] To respond to engine intake boost and torque increases, the supercharging system controls the system to maximize exhaust gas energy for boost. This control determines engine power and economy. Therefore, it's crucial to be able to diagnose supercharging control systems and identify performance issues as soon as possible. When problems arise, repairs can be performed promptly, minimizing the impact on engine power and economy. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a method for diagnosing the rationality of the supercharging capability of a supercharged engine, which can diagnose the capability of the supercharging control system and determine whether the supercharging system has performance problems as early as possible.

[0004] The technical solution adopted by the present invention to solve the technical problem is to construct a method for diagnosing the rationality of the supercharging capacity of a supercharged engine, comprising:

[0005] Determine the standard threshold value of the boost actuator opening;

[0006] Get the actual average opening degree of the boost actuator under the current working condition;

[0007] Compare the difference between the actual average opening of the boost actuator and the standard threshold of the boost actuator opening under the same working conditions to determine whether a boost rationality fault occurs.

[0008] According to the above scheme, the standard threshold value pct of the boost actuator opening BoostActuatorLim Calculated by the following formula:

[0009]

[0010] Where, pct BoostActuatorBase is the boost actuator opening reference value, dm CylinderBase is the actual intake flow rate reference value of the engine, dm Cylinder is the average value of the actual intake flow rate of the engine, r Spark is the average ignition efficiency, r BaseSpark is the average value of basic ignition efficiency, and λ is the average value of air excess coefficient.

[0011] According to the above scheme, and The methods for obtaining include:

[0012] On the engine test bench, when the target boost pressure is fixed, set When λ=1, the actual boost actuator opening is obtained, that is, the boost actuator opening reference value pct BoostActuatorBase , and then in different The influence of λ on the opening of the boost actuator is calibrated.

[0013] According to the above scheme, the method for determining whether a boost rationality fault occurs is: when one of the following two conditions is met, it indicates that a boost rationality unconfirmed fault has occurred once; otherwise, it indicates that no boost rationality fault has occurred:

[0014] Case 1

[0015] The throttle valve enters the fully open state, and pct BoostActuator -pct BoostActuatorLim ≥Δ1;

[0016] Case 2

[0017] The throttle valve is not fully open, and

[0018]

[0019] The fully open state means that the ratio of the actual engine intake pressure to the throttle inlet gas pressure is not less than the preset value; Δ1 is the opening threshold, Δ1=C×(1+r Adapt ), C is a constant, r Adapt is the self-learning correction value; p BfThrAct is the actual average pressure at the engine throttle inlet, p AftThrAct is the average actual intake pressure of the engine, It is the ratio of the average actual intake pressure of the engine to the average actual pressure at the throttle inlet.

[0020] According to the above scheme, during each driving cycle of the vehicle, the boost rationality fault is detected at most once. If the detection is completed, the current driving cycle will not be tested again until the next driving cycle of the vehicle meets the diagnostic conditions. After each detection is completed, the number of times the diagnosis is satisfied CNT1 and the number of times no fault is diagnosed CNT2 will be recorded and stored, and saved after the vehicle is powered off.

[0021] According to the above scheme, if the number of occurrences CNT1 is greater than the preset value, and the vehicle mileage L used for boost rationality diagnosis exceeds the preset value, and CNT2 is 0, the self-learning correction value r Adapt Updated to: Adapt =r Adapt (z)-0.02, where r Adapt (z) is the self-learning correction value of the last updated learning. After the update is completed, CNT1, CNT2, and L are cleared and then accumulated and updated again.

[0022] According to the above scheme, if the number of occurrences CNT1 is greater than the preset value, and the vehicle mileage L used for boost rationality diagnosis exceeds the preset value, and CNT2 is 10, the self-learning correction value r Adapt Updated to: Adapt =r Adapt (z) + 0.01, where r Adapt (z) is the self-learning correction value of the last updated learning. After the update is completed, CNT1, CNT2, and L are cleared and then accumulated and updated again.

[0023] According to the above scheme, the self-learning correction value r Adapt The value increased by each update is greater than the self-learning correction value r Adapt The value that decreases with each update is small.

[0024] According to the above scheme, after entering the supercharged engine boost rationality diagnosis, the engine speed, the actual engine intake flow, the engine water temperature, the actual engine intake pressure, and the target boost pressure are all the same and are considered to be the same operating conditions.

[0025] The present invention also provides a device for diagnosing the rationality of supercharging capability of a supercharged engine, comprising:

[0026] A standard threshold determination module, used to determine a standard threshold for the opening of the boost actuator;

[0027] The module for obtaining the average opening value is used to obtain the actual average opening value of the boost actuator under the current working condition;

[0028] The judgment module is used to compare the difference between the actual opening average value of the boost actuator and the standard threshold value of the boost actuator opening under the same working conditions to determine whether a boost rationality fault occurs.

[0029] The present invention also provides an automobile comprising the device for diagnosing the rationality of supercharging capability of a supercharged engine.

[0030] The present invention also provides an electronic device comprising: a processor, a communication interface, a memory and a communication bus, wherein the processor, the communication interface and the memory communicate with each other via the communication bus; a computer program is stored in the memory, and when the program is executed by the processor, the processor executes the steps of the method for diagnosing the rationality of the boosting capacity of the supercharged engine.

[0031] The present invention also provides a computer-readable storage medium having executable instructions stored thereon. When the instructions are executed by a processor, the processor implements the method for diagnosing the rationality of the supercharging capability of the supercharged engine.

[0032] The method and device for diagnosing the rationality of the supercharging capacity of a supercharged engine according to the present invention have the following beneficial effects:

[0033] Without affecting the normal control of the engine, the present invention identifies the influence of ignition efficiency and other factors on the opening of the boost actuator, updates the boost actuator opening threshold, and simultaneously updates the difference in judging boost system failures in real time as the engine life cycle progresses and as the boost system ages, identifies whether the boost system capacity is abnormal, and performs repairs as soon as possible when problems occur, thereby reducing the impact on the engine's power and economy. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] The present invention will be further described below with reference to the accompanying drawings and embodiments, in which:

[0035] Figure 1 is a flow chart of a method for diagnosing the rationality of supercharging capability of a supercharged engine according to the present invention;

[0036] Figure 2 It is a logic block diagram of the method for diagnosing the rationality of the supercharging capability of a supercharged engine according to the present invention. DETAILED DESCRIPTION

[0037] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, specific embodiments of the present invention are now described in detail with reference to the accompanying drawings.

[0038] Example 1

[0039] The method for diagnosing the rationality of the supercharging capability of a supercharged engine of the present invention must meet certain conditions, which are as follows:

[0040] 1. The boost control is in a closed-loop control state. The boost control closed-loop control conditions can be found in patent CN201910988050.8 "Exhaust Gas Turbine Engine Boost Closed-Loop Adaptive System and Control Method";

[0041] 2. The engine speed fluctuation is within the preset range. In this example, the preset range is ±15 rpm;

[0042] 3. The actual engine intake pressure (the actual value of the intake pressure at the throttle outlet, i.e. the actual value of the gas pressure entering the cylinder) fluctuates within a preset range. In this example, ±2kPa is used;

[0043] 4. The target engine intake pressure (the target value of the intake pressure at the throttle outlet, i.e., the target value of the gas pressure entering the cylinder) fluctuates within a preset range. In this example, it is set to ±2kPa;

[0044] 5. The difference between the target opening of the boost actuator and the actual opening (the larger the opening, the stronger the boost capability, the opening changes from 0% to 100%) is within the preset range, in this example ±1%;

[0045] 6. The throttle opening fluctuation is within the preset range, in this example ±1%;

[0046] 7. The actual opening fluctuation of the boost actuator is within the preset range, which is ±1% in this example;

[0047] 8. The target boost pressure (for details, see patent CN202010109549.X "Method for Determining Target Boost Pressure of Exhaust Gas Turbocharged Engine, Storage Medium") fluctuates within a preset range, which in this example is ±2 kPa.

[0048] 9. The difference between the target boost pressure and the actual boost pressure is within a preset range, which in this example is ±2 kPa.

[0049] 10. The engine water temperature is within the preset range (60°C to 100°C in this example), and the engine water temperature fluctuation is within the preset range (±3°C in this example);

[0050] 11. The difference between the target air-fuel ratio and the actual air-fuel ratio is within a preset range, which in this example is ±0.05;

[0051] 12. The target air-fuel ratio fluctuation is within a preset range, which in this example is ±0.02;

[0052] 13. The final ignition angle efficiency of the engine fluctuates within a preset range, which in this example is ±0.05.

[0053] 14. The engine's basic ignition angle efficiency fluctuates within a preset range, which in this example is ±0.05. The definition of basic ignition angle efficiency can be found in patent CN202110717601.4, "Method, Computer Device, and Storage Medium for Calculating Engine Basic Ignition Efficiency."

[0054] 15. The engine has not experienced fuel shortage;

[0055] 16. EGR rate is 0;

[0056] 17. No fault occurs in the sensors related to the boost system;

[0057] 18. No fault occurs in the actuators related to the boost system;

[0058] 19. No GPF-related faults occurred;

[0059] 20. No catalyst-related faults occurred;

[0060] 21. No boost rationality fault diagnosis was performed during this vehicle driving cycle.

[0061] The supercharged engine boost rationality diagnosis can only be performed after all of the above conditions have been met for a period exceeding the preset time t0 (in this example, t0 is 2 seconds). If all of the above conditions are not met during the supercharged engine boost rationality diagnosis, the diagnosis is terminated. Recording and collecting supercharged system performance fault data can only be resumed in the current driving cycle after all of the above conditions are met again.

[0062] like Figure 1 As shown, the method for diagnosing the rationality of the supercharging capability of a supercharged engine includes the following steps:

[0063] S1. Determine the standard threshold value of the boost actuator opening.

[0064] Booster actuator opening standard threshold pct BoostActuatorLim The actual opening average value of the boost actuator pct BoostActuator , average ignition efficiency r Spark , average value of basic ignition efficiency r BaseSpark , average value of air excess coefficient λ, average value of actual engine intake flow dm Cylinder , the actual engine intake flow reference value dm CylinderBase related.

[0065]

[0066] The ignition efficiency affects the exhaust energy, which in turn affects the ability of the boost control itself. Under the same engine intake flow, the lower the ignition efficiency, the greater the exhaust energy, and the smaller the boost actuator opening can achieve the same boost pressure. Therefore, under the same boost pressure, the smaller the boost actuator opening; the engine intake flow also affects the exhaust capacity. The larger the intake flow, the smaller the boost actuator opening can achieve the same boost pressure; the larger the average value of the air excess coefficient λ, the more air accounts for the mixture, and the higher the exhaust temperature is relatively. Under the same engine intake density, the smaller the exhaust energy, and thus the larger the boost actuator opening can achieve the same boost pressure.

[0067] Actual engine intake flow reference value dm CylinderBase , is the reference value of the intake flow rate, which is 15g / s in this example. and The method of obtaining the boost pressure is to first set the target boost pressure on the engine test bench. When λ=1, the actual boost actuator opening is obtained, that is, the boost actuator opening reference value pct BoostActuatorBase , and then in different The influence of the opening degree of the boost actuator under λ is calibrated. Based on this, the calibration data of this example are shown in Table 1 and Table 2:

[0068] Table 1

[0069]

[0070] Table 2

[0071]

[0072] S2. Obtain the average actual opening degree of the boost actuator under the current working condition.

[0073] After entering the supercharged engine boost rationality diagnosis, identical engine speed, actual engine intake flow, engine water temperature, actual engine intake pressure, and target boost pressure are considered identical operating conditions. The average values ​​of the current engine speed, actual engine intake flow, engine water temperature, actual engine throttle inlet pressure, actual engine intake pressure, target boost pressure, engine exhaust temperature, engine ignition angle efficiency, actual boost actuator opening, and the ratio of the actual air-fuel ratio to the ideal air-fuel ratio are calculated. The actual air-fuel ratio can be detected by the wide-band oxygen sensor in the exhaust system. In this example, the equivalent air-fuel ratio is 14.3, which is determined by the fuel quality. The ratio of the actual air-fuel ratio to the ideal air-fuel ratio is referred to as the air excess coefficient.

[0074] S3. Compare the difference between the actual average opening of the boost actuator and the standard threshold value of the boost actuator opening under the same working conditions to determine whether a boost rationality fault occurs.

[0075] Case 1

[0076] The throttle valve enters the fully open state, which means that the ratio of the actual engine intake pressure to the throttle valve inlet gas pressure is not less than the preset value, which is 0.98 in this example; and the throttle valve opening exceeds the preset value, which is 95% in this example.

[0077] pct BoostActuator -pct BoostActuatorLim ≥Δ1

[0078] Case 2

[0079] The throttle valve is not fully open, and

[0080]

[0081] If either of the above two conditions is met, a boost rationality failure has occurred; otherwise, no boost rationality failure has occurred. If the number of unconfirmed boost rationality failures exceeds a preset number (50 in this example), a boost rationality failure has occurred. After a boost capability failure occurs, boost rationality diagnosis will no longer be performed until the fault is cleared by the aftermarket 4S dealership.

[0082] Among them, Δ1 is the opening threshold, Δ1=C×(1+r Adapt ), C is a constant, which is 5% in this example. Adapt It is the self-learning correction value, its initial value is 0, and it can be saved when the vehicle is powered off. As shown in Table 3, p BfThrAct is the actual average pressure at the engine throttle inlet, p AftThrAct It is the actual average value of the engine intake pressure. It is based on the ratio of the average actual intake pressure of the engine to the average actual pressure at the throttle inlet. The smaller the ratio, the greater the throttle throttling effect, and a greater boost capacity is required to maintain the stability of the boost pressure. Therefore, the larger the opening of the boost actuator, the larger the threshold will be appropriately increased.

[0083] Table 3

[0084]

[0085]

[0086] During each driving cycle, the boost rationality fault is detected at most once. If the test is completed, it will not be tested again in that driving cycle until the vehicle meets the diagnostic conditions during the next driving cycle. After each test is completed, the number of diagnostic satisfaction times (CNT1) and the number of times the fault is diagnosed as not occurring (CNT2) are recorded and stored, and saved after the vehicle is powered off.

[0087] Case 1: If the number of occurrences CNT1 is greater than the preset value (10,000 times in this example), 2) the vehicle mileage L used for boost rationality diagnosis exceeds the preset value (10,000 kilometers in this example), 3) CNT2 is 0, then the self-learning correction value r Adapt Updated to: Adapt =r Adapt (z)-0.02, where r Adapt (z) is the self-learning correction value of the last update. After the update is completed, CNT1, CNT2, and L are all cleared to 0, and then the update is accumulated again.

[0088] Case 2: If the number of occurrences CNT1 is greater than the preset value (100 times in this example), 2) the vehicle mileage L used for boost rationality diagnosis exceeds the preset value (8,000 kilometers in this example), and 3) CNT2 is 10, then the self-learning correction value r Adapt Updated to: Adapt =r Adapt (z) + 0.01, where r Adapt(z) is the self-learning correction value of the last update. After the update is completed, CNT1, CNT2, and L are all cleared to 0, and then the update is accumulated again.

[0089] In other cases, r Adapt =r Adapt (z).

[0090] It should be noted that the self-learning correction value r Adapt The value increased each time (in this example, 0.01 each time) is greater than the self-learning correction value r Adapt The reason why the value decreased each time it is updated (in this example, it decreases by 0.02 each time) is small is that the update of the threshold does not make it more difficult to diagnose the fault. This is mainly because the probability of supercharging failure is greater as the supercharging life cycle continues to progress, and it is avoided that the supercharging failure is not diagnosed in time and the engine power and economy are lost.

[0091] Example 2

[0092] The present invention also provides a device for diagnosing the rationality of supercharging capability of a supercharged engine, comprising:

[0093] A standard threshold determination module, used to determine a standard threshold for the opening of the boost actuator;

[0094] The module for obtaining the average opening value is used to obtain the actual average opening value of the boost actuator under the current working condition;

[0095] The judgment module is used to compare the difference between the actual opening average value of the boost actuator and the standard threshold value of the boost actuator opening under the same working conditions to determine whether a boost rationality fault occurs.

[0096] Example 3

[0097] The present invention also provides an automobile comprising a device for diagnosing the rationality of the supercharging capability of a supercharged engine.

[0098] Example 4

[0099] The present invention also provides an electronic device comprising: a processor, a communication interface, a memory and a communication bus, wherein the processor, the communication interface and the memory communicate with each other via the communication bus; a computer program is stored in the memory, and when the program is executed by the processor, the processor executes the steps of the method for diagnosing the rationality of the boosting capacity of the supercharged engine.

[0100] Example 5

[0101] The present invention also provides a computer-readable storage medium having executable instructions stored thereon. When the instructions are executed by a processor, the processor implements the method for diagnosing the rationality of the supercharging capability of the supercharged engine.

[0102] Those skilled in the art will appreciate that the embodiments of the present application can be provided as methods, systems, or computer program products. Therefore, the present application can adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment in combination with software and hardware. Moreover, the present application can adopt 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.) that contain computer-usable program code.

[0103] 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 box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes 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 steps in the process. 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.

[0104] 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.

[0105] 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.

[0106] The embodiments of the present invention are described above in conjunction with the accompanying drawings, but the present invention is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present invention, ordinary technicians in this field can also make many forms without departing from the scope of protection of the present invention and the claims, all of which are protected by the present invention.

Claims

1. A method for diagnosing the rationality of supercharging capability of a supercharged engine, characterized in that: include: Determine the standard threshold value of the boost actuator opening; Get the actual average opening degree of the boost actuator under the current working condition; Compare the difference between the actual average opening of the boost actuator and the standard threshold of the boost actuator opening under the same working conditions to determine whether a boost rationality fault has occurred; Standard threshold value of boost actuator opening Calculated by the following formula: Where, is the boost actuator opening reference value, is the actual intake flow reference value of the engine, is the average value of the actual intake flow rate of the engine, is the average ignition efficiency, is the average value of basic ignition efficiency, is the average value of the excess air coefficient, and are the correction parameters obtained during bench calibration.

2. The method for diagnosing the rationality of supercharging capability of a supercharged engine according to claim 1, characterized in that: and The methods for obtaining include: On the engine test bench, when the target boost pressure is fixed, set 、 、 The actual boost actuator opening is obtained, that is, the boost actuator opening reference value , and then in different 、 、 The influence of the change in the opening of the boost actuator is calibrated.

3. The method for diagnosing the rationality of supercharging capability of a supercharged engine according to claim 1, characterized in that: The method for determining whether a boost rationality fault has occurred is as follows: when one of the following two conditions is met, it indicates that a boost rationality unconfirmed fault has occurred once; otherwise, it indicates that no boost rationality fault has occurred: Case 1 The throttle valve is fully open, and ; Case 2 The throttle valve is not fully open, and ； The fully open state means that the ratio of the actual engine intake pressure to the throttle inlet gas pressure is not less than the preset value; is the average actual opening degree of the boost actuator, is the opening threshold, , C is a constant, It is the self-learning correction value; is the actual average pressure at the engine throttle inlet, is the average actual intake pressure of the engine, It is the ratio of the average actual intake pressure of the engine to the average actual pressure at the throttle inlet.

4. The method for diagnosing the rationality of supercharging capability of a supercharged engine according to claim 3, characterized in that: During each driving cycle of the vehicle, the boost rationality fault is detected at most once. If the detection is completed, the detection will not be repeated in this driving cycle until the vehicle meets the diagnostic conditions in the next driving cycle. After each detection is completed, the number of times the diagnosis is satisfied CNT1 and the number of times no fault is diagnosed CNT2 will be recorded and stored, and saved after the vehicle is powered off.

5. The method for diagnosing the rationality of supercharging capability of a supercharged engine according to claim 4, characterized in that: If the number of occurrences CNT1 is greater than the preset value, and the vehicle mileage L used for boost rationality diagnosis exceeds the preset value, and CNT2 is 0, the self-learning correction value Updated to: ,in This is the self-learning correction value of the last updated learning. After the update is completed, CNT1, CNT2, and L are cleared, and then accumulated and updated again.

6. The method for diagnosing the rationality of supercharging capability of a supercharged engine according to claim 5, characterized in that: If the number of occurrences CNT1 is greater than the preset value, and the vehicle mileage L used for boost rationality diagnosis exceeds the preset value, and CNT2 is 10, the self-learning correction value Updated to: ,in This is the self-learning correction value of the last updated learning. After the update is completed, CNT1, CNT2, and L are cleared, and then accumulated and updated again.

7. The method for diagnosing the rationality of supercharging capability of a supercharged engine according to claim 6, characterized in that: Self-learning correction value The value increased by each update is greater than the self-learning correction value The value that decreases with each update is small.

8. The method for diagnosing the rationality of supercharging capability of a supercharged engine according to claim 1, characterized in that: After entering the supercharged engine boost rationality diagnosis, if the engine speed, actual engine intake flow, engine water temperature, actual engine intake pressure, and target boost pressure are all the same, it is determined that the operating conditions are the same.

9. A device for diagnosing the rationality of supercharging capability of a supercharged engine, characterized in that: include: A standard threshold determination module, used to determine a standard threshold for the opening of the boost actuator; The module for obtaining the average opening value is used to obtain the actual average opening value of the boost actuator under the current working condition; A judgment module is used to compare the difference between the actual opening average value of the boost actuator and the standard threshold value of the boost actuator opening under the same working conditions to determine whether a boost rationality fault occurs; Standard threshold value of boost actuator opening Calculated by the following formula: Where, is the boost actuator opening reference value, is the actual intake flow reference value of the engine, is the average value of the actual intake flow rate of the engine, is the average ignition efficiency, is the average value of basic ignition efficiency, is the average value of the excess air coefficient, and are the correction parameters obtained during bench calibration.

10. An automobile, characterized in that: It includes the device for diagnosing the rationality of the supercharging capability of a supercharged engine as claimed in claim 9.

11. An electronic device comprising: A processor, a communication interface, a memory and a communication bus, wherein the processor, the communication interface and the memory communicate with each other via the communication bus; characterized in that a computer program is stored in the memory, and when the program is executed by the processor, the processor executes the steps of the method for diagnosing the rationality of the supercharged engine's supercharging capacity according to any one of claims 1 to 8.

12. A computer-readable storage medium having executable instructions stored thereon, characterized in that: When the instruction is executed by the processor, the processor implements the method for diagnosing the rationality of the supercharging capability of a supercharged engine as described in any one of claims 1 to 8.

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