Diagnostic method for hybrid system engine differential pressure sensor and related equipment

Abstract

The invention belongs to the technical field of differential pressure sensor diagnosis, and provides a diagnosis method and related equipment for a differential pressure sensor of a hybrid power system engine, and the method comprises the steps: determining overload flow resistance through the ratio of differential pressure to exhaust flow, and obtaining a flow resistance difference value through the overload flow resistance and preset calculation flow resistance; then, the flow resistance difference value is compared with the flow resistance difference threshold value, the differential pressure sensor is diagnosed, whether the differential pressure sensor is accurate or not is judged, and the corresponding relation among the differential pressure, the exhaust flow and the flow resistance is only related to the carbon loading capacity and the back pressure at the current moment and cannot be changed due to the surrounding environment condition; the inaccuracy when the pressure difference is judged by adopting a steady-state working condition and a parking regeneration working condition in the traditional technology is avoided, and the purpose of real-time judgment of the pressure difference sensor can be achieved; meanwhile, after the flow resistance difference value is corrected according to the flow resistance correction coefficient determined according to the temperature and the exhaust flow, differential pressure sensor diagnosis is conducted again, and the phenomena of false alarm and the like of overload faults of the diesel particle filter are avoided.

Description

Technical Field

[0001] The present invention belongs to the technical field of differential pressure sensor diagnosis, and in particular, relates to a diagnostic method for a differential pressure sensor of a hybrid system engine and related equipment. Background Art

[0002] Diesel engines filter soot through the diesel particulate filter (DPF) system. The DPF system may be overloaded during use. Diesel engines usually determine whether the DPF system is overloaded by monitoring the DPF system pressure difference. However, the DPF system pressure difference sensor often has sensor measurement deviations due to water vapor interference, voltage fluctuations and other issues, resulting in false alarms of DPF overload failures. Based on this, when monitoring the DPF system, diagnosing the pressure difference sensor can avoid false alarms of overload failures.

[0003] In the traditional method of diagnosing differential pressure sensors, when the vehicle is in stable operating conditions or parking regeneration mode, the preset threshold is compared with the measured value to determine whether the sensor has drifted. However, when using traditional technology, the preset threshold is difficult to determine on the vehicle side. The actual differential pressure on the vehicle is closely related to the surrounding environment, carbon load and other conditions. In particular, changes in the surrounding environment can easily lead to misjudgment. Both steady-state conditions and parking regeneration require actual vehicle conditions and cannot be judged at any time. Summary of the invention

[0004] In order to solve the above problems, the present invention proposes a diagnostic method and related equipment for a differential pressure sensor of a hybrid system engine. The present invention uses the uniqueness of the flow resistance corresponding to the pressure difference and the exhaust flow to judge the differential pressure sensor, avoiding the inaccuracy of the traditional technology when using steady-state conditions and parking regeneration conditions to judge the differential pressure, and can achieve the purpose of real-time judgment of the differential pressure sensor; at the same time, if the diagnosis result meets the preset conditions, the differential pressure sensor diagnosis is stopped, otherwise, the differential pressure sensor diagnosis is performed again after the flow resistance difference is corrected according to the flow resistance correction coefficient determined by the temperature and the exhaust flow, and the corrected flow resistance difference is used to determine whether there is a diesel particulate filter overload fault, thereby avoiding the false alarm of the diesel particulate filter overload fault and the like.

[0005] In order to achieve the above object, the present invention is implemented through the following technical solutions: In a first aspect, the present invention provides a diagnostic method for a hybrid system engine pressure difference sensor, comprising: Obtain the differential pressure of the differential pressure sensor and the exhaust flow rate of the diesel particulate filter when the diesel particulate filter overload fault alarm is triggered; Determine the overload flow resistance according to the ratio of the pressure difference to the exhaust flow rate; obtain the flow resistance difference through the overload flow resistance and the preset calculated flow resistance; wherein the calculated flow resistance is the slope of the function obtained by fitting the test data; The pressure differential sensor is diagnosed by comparing the flow resistance difference with the flow resistance difference threshold; if the diagnosis result meets the preset conditions, the pressure differential sensor diagnosis is stopped, otherwise, the pressure differential sensor diagnosis is performed again after the flow resistance difference is corrected according to the flow resistance correction coefficient determined by the temperature and the exhaust flow.

[0006] Furthermore, a pressure difference test cycle is performed, and the hybrid system motor is used to control the engine to perform a cycle test according to a preset cycle. The pressure difference and exhaust flow rate during the cycle test are collected, and a function image is fitted based on the pressure difference and exhaust flow rate. The function slope is the calculated flow resistance.

[0007] Furthermore, the multiple pressure difference values ​​corresponding to the exhaust flow are averaged, and then the absolute value of the difference between each pressure difference value and the average value is calculated. The pressure difference value whose absolute value exceeds the preset value is defined as an abnormal value and deleted. Furthermore, when determining the flow resistance difference threshold △, an adjustment factor is added , Determined by the rate of change of the slope of the fitted function graph: ; ; in, To calculate the flow resistance; It is the pressure difference and actual overload flow resistance corresponding to the exhaust flow value; is the slope of the fitting function graph corresponding to the overload fault; For the function graph At the preset position on the left, the slope of the preset distance point in the direction of increasing exhaust flow value; For the function graph At the preset position on the right, the slope of the preset distance point in the direction in which the exhaust flow value decreases.

[0008] Furthermore, according to the temperature before the overload point and the exhaust flow at the overload point, the flow resistance correction coefficient is obtained in the preset map; the flow resistance correction value is obtained according to the product of the flow resistance difference and the flow resistance correction coefficient, and then the pressure difference sensor diagnosis is performed according to the flow resistance correction value.

[0009] Further, when the flow resistance difference is less than the flow resistance difference threshold, it is determined that the diesel particulate filter is overloaded. Otherwise, the pressure differential sensor is calibrated and then the pressure differential sensor diagnosis is performed.

[0010] In a second aspect, the present invention further provides a diagnostic system for a hybrid system engine pressure difference sensor, comprising: The data acquisition module is configured to: obtain the pressure difference of the pressure difference sensor and the exhaust flow rate of the diesel particulate filter when the diesel particulate filter overload fault alarm is triggered; The flow resistance difference determination module is configured to: determine the overload flow resistance according to the ratio of the pressure difference to the exhaust flow rate; obtain the flow resistance difference through the overload flow resistance and the preset calculated flow resistance; wherein the calculated flow resistance is the slope of the function obtained by fitting the test data; The diagnostic module is configured to: diagnose the pressure difference sensor by comparing the flow resistance difference with the flow resistance difference threshold; if the diagnostic result meets the preset conditions, stop the pressure difference sensor diagnosis; otherwise, correct the flow resistance difference according to the flow resistance correction coefficient determined by the temperature and the exhaust flow, and then diagnose the pressure difference sensor again.

[0011] In a third aspect, the present invention further provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the steps of the diagnostic method for a hybrid system engine pressure difference sensor as described in the first aspect.

[0012] In a fourth aspect, the present invention further provides an electronic device comprising a memory, a processor, and a computer program stored in the memory and capable of running on the processor, wherein when the processor executes the program, the steps of the diagnostic method for a hybrid system engine pressure difference sensor described in the first aspect are implemented.

[0013] In a fifth aspect, the present invention further provides a computer program product, which includes a computer program. When the computer program is executed by a processor, the steps of the diagnostic method for a hybrid system engine pressure difference sensor described in the first aspect are implemented.

[0014] Compared with the prior art, the present invention has the following beneficial effects: The present invention determines the overload flow resistance by the ratio of the pressure difference and the exhaust flow rate, obtains the flow resistance difference by the overload flow resistance and the preset calculated flow resistance, wherein the calculated flow resistance is the slope of the function obtained by fitting the test data; then, by comparing the flow resistance difference with the flow resistance difference threshold, the pressure difference sensor is diagnosed to determine whether the pressure difference sensor is accurate, the corresponding relationship between the pressure difference, the exhaust flow rate and the flow resistance is only related to the carbon load and the back pressure at the current moment, and will not change due to the surrounding environmental conditions, and the pressure difference sensor is judged by the uniqueness of the flow resistance corresponding to the pressure difference and the exhaust flow rate, thereby avoiding the inaccuracy of the traditional technology when using the steady-state working condition and the parking regeneration working condition to judge the pressure difference, and can achieve the purpose of real-time judgment of the pressure difference sensor; at the same time, if the diagnosis result meets the preset conditions, the pressure difference sensor diagnosis is stopped, otherwise, after the flow resistance difference is corrected according to the flow resistance correction coefficient determined by the temperature and the exhaust flow rate, the pressure difference sensor diagnosis is performed again, and the corrected flow resistance difference is used to determine whether there is a diesel particulate filter overload fault, thereby avoiding the phenomenon of false alarm of diesel particulate filter overload fault. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The drawings in the specification that constitute a part of this embodiment are used to provide a further understanding of this embodiment. The schematic embodiments of this embodiment and their descriptions are used to explain this embodiment and do not constitute improper limitations on this embodiment.

[0016] Figure 1 This is a framework diagram of the fault confirmation process of Example 1 of the present invention; Figure 2 This is a diagnostic flow chart of a differential pressure sensor according to Embodiment 1 of the present invention; Figure 3 The preset pressure difference cycle of Example 1 of the present invention; Figure 4 This is a schematic diagram of a fitting function image according to Embodiment 1 of the present invention; Figure 5 Schematic diagram of the slope in the function graph of Example 1 of the present invention; Figure 6 This is a flow chart of the pressure difference sensor calibration in Example 1 of the present invention. DETAILED DESCRIPTION

[0017] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0018] It should be noted that the following detailed descriptions are exemplary and are intended to provide further explanation of the present application. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which the present application belongs.

[0019] Embodiment 1: When the differential pressure sensor is diagnosed in the stable working condition of the whole vehicle, the DPF differential pressure is compared with the preset threshold value when the engine is idling and relatively stable, so as to determine whether the DPF differential pressure sensor is credible, and the differential pressure measurement value is corrected according to the differential pressure deviation value at idling. When the differential pressure sensor is diagnosed in the parking regeneration mode, the DPF differential pressure sensor is diagnosed in the parking regeneration mode, and the differential pressure measurement value is compared with the preset threshold value to make a credibility judgment. As described in the background technology, whether the differential pressure sensor is diagnosed in the stable working condition of the whole vehicle or the parking regeneration mode, the preset threshold value is difficult to determine at the whole vehicle end, and the actual differential pressure on the whole vehicle is closely related to the surrounding environment, carbon load and other conditions. It is easy to make a misjudgment by using a single point for judgment, and both the steady-state working condition and the parking regeneration require the actual conditions of the whole vehicle, and it is impossible to make a judgment at any time.

[0020] In order to solve at least one of the above problems, the present embodiment provides a diagnostic method for a pressure differential sensor of a hybrid system engine, which determines whether the pressure differential sensor is accurate by calculating the flow resistance of the pressure differential and the exhaust flow rate; the correspondence between the pressure differential, the exhaust flow rate and the flow resistance is only related to the carbon loading and back pressure at the current moment, and will not change due to the surrounding environmental conditions. It is more reasonable to use the uniqueness of the flow resistance corresponding to the pressure differential and the exhaust flow rate to judge the pressure differential sensor, avoiding the inaccuracy of the traditional technology of using steady-state conditions and parking regeneration conditions to judge the pressure differential.

[0021] like Figure 1 As shown, the present embodiment provides a method for diagnosing a differential pressure sensor for a hybrid system engine, comprising: when a diesel particulate filter overload fault alarm is sounded, obtaining the differential pressure of the differential pressure sensor and the exhaust flow rate of the diesel particulate filter. Determine the overload flow resistance according to the ratio of the differential pressure to the exhaust flow rate; obtain the flow resistance difference through the overload flow resistance and the preset calculated flow resistance; wherein the calculated flow resistance is the slope of the function obtained by fitting the test data; diagnose the differential pressure sensor by comparing the flow resistance difference with the flow resistance difference threshold; if the diagnosis result meets the preset conditions, stop the differential pressure sensor diagnosis, otherwise, perform the differential pressure sensor diagnosis again after correcting the flow resistance difference according to the flow resistance correction coefficient determined by the temperature and the exhaust flow rate.

[0022] like Figure 2 and Figure 3 As shown, when the pressure differential sensor is diagnosed, a pressure differential test cycle is performed, and the hybrid system motor is used to control the engine to perform a cycle test according to a preset pressure differential cycle, and the pressure differential and exhaust flow rate signals are collected through the ECU (Electronic Control Unit). The preset pressure differential cycle represents the relationship between the speed and the engine load. Optionally, the preset pressure differential cycle can be as follows Figure 3As shown; a function image is fitted according to the collected pressure difference and exhaust flow signal, and the function slope is calculated, which is the calculated flow resistance k1; then the overload error point is run, and the corresponding overload flow resistance k2 is obtained according to the collected pressure difference, and the flow resistance difference Δk is obtained by k1-k2; according to the collected exhaust flow, the corresponding preset flow resistance difference threshold is found, and the flow resistance difference Δk is compared with the flow resistance difference threshold to determine whether the measured pressure difference is too large or too small.

[0023] S1. Determination of calculated flow resistance: S1.1, Cycle test: Through the cycle test, multiple sets of exhaust flow values ​​and pressure difference values ​​corresponding to the exhaust flow are obtained. Optionally, the exhaust flow values ​​are taken as 100m 2 / h、200m 2 / h、300m 2 / h、400m 2 / h、500m 2 / h、600m 2 / h、700m 2 / h、800m 2 / h、900m 2 / h and 1000m 2 / h, the corresponding pressure difference value. Take multiple pressure difference values ​​corresponding to each exhaust flow value, for example, through the cycle test, obtain multiple groups of exhaust flow values ​​100m 2 / h corresponding to the pressure difference value, the exhaust flow value is 100m 2 / h corresponding to multiple pressure difference values ​​to delete abnormal values ​​and other processing; optional, the exhaust flow value 100m 2 The average of multiple pressure difference values ​​corresponding to / h is calculated, and then the absolute value of the difference between each pressure difference value and the average value is calculated. The pressure difference value whose absolute value exceeds the preset value is defined as an abnormal value and deleted; the average value of the multiple pressure difference values ​​after deletion is solved again and used as the exhaust flow value 100m 2 The pressure difference value corresponding to the exhaust flow rate is the pressure difference value under / h, and the pressure difference values ​​corresponding to other exhaust flow rates are deleted as abnormal values.

[0024] S1.2. Fit the function graph to obtain the calculated flow resistance: The exhaust flow rate is used as the horizontal coordinate and the pressure difference is used as the vertical coordinate. The function image is fitted using conventional fitting technology to obtain a straight line with a fixed slope.

[0025] S2, flow resistance difference threshold Determination of: Optional, such as Figure 4 and Figure 5 As shown, by setting an overload fault test in the test, the pressure difference corresponding to the exhaust flow value and the actual overload flow resistance k3 are obtained, and the flow resistance difference threshold is obtained by k1-k3 .

[0026] In some other embodiments, in order to increase the flow resistance difference threshold The accuracy of the flow resistance difference threshold is When adding the adjustment factor , Determined by the rate of change of the slope of the fitted function graph.

[0027] ; ; in, is the slope of the fitting function graph corresponding to the overload fault; For the function graph At a preset distance position near the left side, the slope of the preset distance point in the direction of increasing exhaust flow value; For the function graph At a preset distance position near the right side, the slope of the preset distance point in the direction in which the exhaust flow value decreases; the preset distance can be determined according to the horizontal coordinate or the vertical coordinate.

[0028] It is understandable that the error caused by the value range and fitting method in the fitting function graph will make the flow resistance difference threshold Increase, thereby affecting the accuracy of the differential pressure sensor diagnosis, in this embodiment, through the dynamic adjustment factor The offset of the fitting error is used to reduce the fitting error, thereby increasing the flow resistance difference threshold Accuracy, thereby improving the accuracy of differential pressure sensor diagnosis.

[0029] S3. Comparison between flow resistance difference and flow resistance difference threshold: Compare the flow resistance difference Δk with the flow resistance difference threshold To determine whether the measured pressure difference is too large or too small. Optionally, when the flow resistance difference Δk is equal to the flow resistance difference threshold When the difference between the flow resistance difference Δk and the flow resistance difference threshold △ is smaller than a preset value, the measured pressure difference is judged to be too small.

[0030] like Figure 6 As shown, when it is judged that the measured pressure difference is too large, the pressure difference sensor is calibrated; optionally, the preset map MAP is checked according to the temperature before the DPF at the overload point and the exhaust flow at the overload point to obtain the flow resistance correction coefficient, and then the flow resistance correction value is obtained by multiplying the flow resistance difference Δk by the correction coefficient, and the carbon load is calculated according to the flow resistance correction value.

[0031] It can be understood that there is a one-to-one correspondence between pressure difference, flow resistance and carbon loading. Pressure difference calibration is based on the calculated flow resistance. The pressure difference at different flow rates and temperatures is calibrated. First, the pressure difference at the overload point can be calculated based on the flow resistance difference + the overload flow resistance k2 at the overload point to obtain the actual flow resistance, that is, , and then calculate the actual pressure difference based on the actual flow resistance and the gas flow resistance equation, that is, get the pressure difference correction value of the overload point, and complete the pressure difference calibration of this point; for other temperature and exhaust flow points, it is generally believed that the drifting pressure difference sensor measurement value will deviate more as the temperature and exhaust flow increase. Therefore, it is necessary to first obtain the flow resistance correction coefficient at different temperatures and exhaust flow rates by checking the preset MAP according to the temperature and exhaust flow of the overload point, that is, the higher the temperature and exhaust flow of the actual operating point compared to the over-point temperature and exhaust flow, the greater the correction coefficient, and the greater the correction of the pressure difference value; MAP can be tested on the test bench to calibrate the deviation at different temperature and flow rates. Obtain the flow resistance correction coefficient at different actual temperature and flow rates, and then multiply the flow resistance difference Δk by the correction coefficient to obtain the flow resistance correction value, and then calculate the carbon load based on the flow resistance correction value.

[0032] For example, suppose that at the overload point, the measured pressure difference deviation is 50% or 5 kPa through the calculated actual flow resistance and actual pressure difference, but at a higher temperature and flow point, the deviation may be 70% or 8 kPa. Therefore, it is necessary to look up a flow resistance correction coefficient in the table to obtain the correction amount at different temperatures and flow rates to correct the pressure difference sensor.

[0033] Embodiment 2: This embodiment provides a diagnostic system for a hybrid system engine pressure difference sensor, including: The data acquisition module is configured to: obtain the pressure difference of the pressure difference sensor and the exhaust flow rate of the diesel particulate filter when the diesel particulate filter overload fault alarm is triggered; The flow resistance difference determination module is configured to: determine the overload flow resistance according to the ratio of the pressure difference to the exhaust flow rate; obtain the flow resistance difference through the overload flow resistance and the preset calculated flow resistance; wherein the calculated flow resistance is the slope of the function obtained by fitting the test data; The diagnostic module is configured to: diagnose the pressure difference sensor by comparing the flow resistance difference with the flow resistance difference threshold; if the diagnostic result meets the preset conditions, stop the pressure difference sensor diagnosis; otherwise, correct the flow resistance difference according to the flow resistance correction coefficient determined by the temperature and the exhaust flow, and then diagnose the pressure difference sensor again.

[0034] The working method of the system is the same as the diagnostic method for the hybrid system engine pressure difference sensor in Example 1, and will not be repeated here.

[0035] Embodiment 3: This embodiment provides a computer-readable storage medium on which a computer program is stored. When the program is executed by a processor, the steps of the diagnostic method for a hybrid system engine pressure difference sensor described in Embodiment 1 are implemented.

[0036] Embodiment 4: This embodiment provides an electronic device, including a memory, a processor, and a computer program stored in the memory and capable of running on the processor. When the processor executes the program, the steps of the diagnostic method for a hybrid system engine pressure difference sensor described in Example 1 are implemented.

[0037] Embodiment 5: This embodiment provides a computer program product, which includes a computer program. When the computer program is executed by a processor, the steps of the diagnostic method for a hybrid system engine pressure difference sensor described in Embodiment 1 are implemented.

[0038] The above description is only a preferred embodiment of the present embodiment and is not intended to limit the present embodiment. For those skilled in the art, the present embodiment may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present embodiment shall be included in the protection scope of the present embodiment.

Claims

1. A diagnostic method for a hybrid system engine pressure difference sensor, characterized in that: include: Obtain the differential pressure of the differential pressure sensor and the exhaust flow rate of the diesel particulate filter when the diesel particulate filter overload fault alarm is triggered; Determine the overload flow resistance according to the ratio of the pressure difference to the exhaust flow rate; obtain the flow resistance difference through the overload flow resistance and the preset calculated flow resistance; wherein the calculated flow resistance is the slope of the function obtained by fitting the test data; The pressure differential sensor is diagnosed by comparing the flow resistance difference with the flow resistance difference threshold; if the diagnosis result meets the preset conditions, the pressure differential sensor diagnosis is stopped, otherwise, the pressure differential sensor diagnosis is performed again after the flow resistance difference is corrected according to the flow resistance correction coefficient determined by the temperature and the exhaust flow.

2. A diagnostic method for a hybrid system engine pressure difference sensor as claimed in claim 1, characterized in that: When determining the calculated flow resistance, a pressure difference test cycle is performed, and the hybrid system motor is used to control the engine to perform a cycle test according to a preset cycle. The pressure difference and exhaust flow rate during the cycle test are collected, and a function image is fitted based on the pressure difference and exhaust flow rate. The function slope is the calculated flow resistance.

3. A diagnostic method for a hybrid system engine pressure difference sensor as claimed in claim 2, characterized in that: When determining the calculated flow resistance, multiple pressure difference values ​​corresponding to the exhaust flow are averaged, and then the absolute value of the difference between each pressure difference value and the average value is calculated. The pressure difference value whose absolute value exceeds the preset value is defined as an abnormal value and deleted.

4. A diagnostic method for a hybrid system engine pressure difference sensor as claimed in claim 2, characterized in that: When determining the flow resistance difference threshold △, add the adjustment factor , Determined by the rate of change of the slope of the fitted function graph: ； ； in, To calculate the flow resistance; It is the pressure difference and actual overload flow resistance corresponding to the exhaust flow value; is the slope of the fitting function graph corresponding to the overload fault; For the function graph At the preset position on the left, the slope of the preset distance point in the direction of increasing exhaust flow value; For the function graph At the preset position on the right, the slope of the preset distance point in the direction in which the exhaust flow value decreases.

5. The diagnostic method for a hybrid system engine pressure difference sensor according to claim 1, characterized in that: When the flow resistance difference is corrected according to the flow resistance correction coefficient determined by the temperature and the exhaust flow rate, the flow resistance correction coefficient is obtained in a preset map according to the temperature before the overload point and the exhaust flow rate at the overload point; The flow resistance correction value is obtained by multiplying the flow resistance difference by the flow resistance correction coefficient, and the pressure difference sensor is diagnosed based on the flow resistance correction value.

6. The diagnostic method for a hybrid system engine pressure difference sensor according to claim 1, characterized in that: By comparing the flow resistance difference with the flow resistance difference threshold, when the pressure difference sensor is diagnosed, when the flow resistance difference is less than the flow resistance difference threshold, it is determined that the diesel particulate filter is overloaded. Otherwise, the pressure difference sensor is calibrated before the pressure difference sensor is diagnosed.

7. A diagnostic system for a hybrid system engine pressure difference sensor, characterized in that: include: The data acquisition module is configured to: obtain the pressure difference of the pressure difference sensor and the exhaust flow rate of the diesel particulate filter when the diesel particulate filter overload fault alarm is triggered; The flow resistance difference determination module is configured to: determine the overload flow resistance according to the ratio of the pressure difference to the exhaust flow rate; obtain the flow resistance difference through the overload flow resistance and the preset calculated flow resistance; wherein the calculated flow resistance is the slope of the function obtained by fitting the test data; The diagnostic module is configured to: diagnose the pressure difference sensor by comparing the flow resistance difference with the flow resistance difference threshold; if the diagnostic result meets the preset conditions, stop the pressure difference sensor diagnosis; otherwise, correct the flow resistance difference according to the flow resistance correction coefficient determined by the temperature and the exhaust flow, and then diagnose the pressure difference sensor again.

8. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the program is executed by a processor, the steps of the diagnostic method for a hybrid system engine pressure difference sensor as described in any one of claims 1 to 6 are implemented.

9. An electronic device comprising a memory, a processor, and a computer program stored in the memory and capable of running on the processor, characterized in that: When the processor executes the program, the steps of the diagnostic method for a hybrid system engine pressure difference sensor as described in any one of claims 1 to 6 are implemented.

10. A computer program product, characterized in that The computer program product includes a computer program, and when the computer program is executed by a processor, the steps of the diagnostic method for a hybrid system engine pressure difference sensor are implemented as described in any one of claims 1 to 6.

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