A method of fault detection for a sequential turbocharger system and related devices

Abstract

The application discloses a fault detection method of a sequential supercharger system and related devices, and relates to the technical field of engines. A controller acquires the temperature of the air inlet end of an air inlet valve through a temperature sensor and acquires the pressure of the air outlet end of the air inlet valve through a pressure sensor. In the working condition that the controlled supercharger does not enter the working state, whether the exhaust valve has a first sticking fault is judged according to the air outlet end pressure, and whether the air inlet valve has the first sticking fault is judged according to the air inlet end temperature. The first sticking fault is incomplete closing. In the working condition that the controlled supercharger enters the working state, whether the air inlet valve has a second sticking fault is judged according to the air outlet end pressure, and whether the exhaust valve has the second sticking fault is judged according to at least one of the air inlet end temperature or the air outlet end pressure. The second sticking fault is incomplete opening. The application realizes the sticking fault detection of each valve in the sequential supercharger system based on the real-time monitoring of the air inlet end temperature and the air outlet end pressure, and improves the detection accuracy.

Description

TECHNICAL FIELD

[0001] The present application relates to the engine technical field, and particularly relates to a fault detection method of a sequential turbocharger system and a related device. BACKGROUND

[0002] The sequential turbocharger system refers to a turbocharging system composed of two or more than two turbochargers (referred to as turbochargers) in parallel. The sequential turbocharging technology is one of the effective methods to solve the matching contradiction between the diesel engine and the turbocharger and improve the low working condition performance of the diesel engine. The jam of the intake valve and the exhaust valve in the sequential turbocharging system often causes the operation failure of the sequential turbocharging system. At present, the detection result obtained by detecting the valve jam through the pre-turbine exhaust temperature sensor and the turbocharger speed has low accuracy, and therefore, there is an urgent need for a fault detection method for improving the fault detection accuracy of the valve jam. SUMMARY

[0003] In view of the above problems, the present application provides a fault detection method of a sequential turbocharger system and a related device to achieve the purpose of improving the fault detection accuracy of the valve jam. The specific scheme is as follows:

[0004] The first aspect of the present application provides a fault detection method of a sequential turbocharger system, applied to a controller, wherein the controller is in communication with a temperature sensor arranged at an intake end of an intake valve and a pressure sensor arranged at an exhaust end of the intake valve, the intake valve is arranged at an intake end of a compressor of a controlled turbocharger, and the fault detection method of the sequential turbocharger system comprises the following steps.

[0005] The temperature sensor is used to acquire the temperature at the intake end of the intake valve, and the pressure sensor is used to acquire the pressure at the exhaust end of the intake valve.

[0006] In a working condition in which the controlled turbocharger does not enter a working state, it is determined whether a first jam fault exists in the exhaust valve according to the pressure at the exhaust end, and it is determined whether the first jam fault exists in the intake valve according to the temperature at the intake end; the first jam fault is that the exhaust valve is not completely closed, and the exhaust valve is arranged at a turbine intake end of the controlled turbocharger.

[0007] In a working condition in which the controlled turbocharger enters the working state, it is determined whether a second jam fault exists in the intake valve according to the pressure at the exhaust end, and it is determined whether the second jam fault exists in the exhaust valve according to at least one of the temperature at the intake end or the pressure at the exhaust end; the second jam fault is that the exhaust valve is not completely opened.

[0008] In a possible implementation, the fault detection method of the sequential turbocharger system further comprises the following steps.

[0009] The engine speed is monitored.

[0010] If the engine speed is not greater than a preset speed threshold, it is determined that the controlled supercharger does not enter the working state

[0011] If the engine speed is greater than the speed threshold, it is determined that the controlled supercharger enters the working state.

[0012] In a possible implementation, the determination of whether the exhaust valve has a first sticking fault according to the outlet end pressure comprises:

[0013] determining whether the outlet end pressure is less than a preset first pressure threshold, and if so, determining that the exhaust valve has a first sticking fault;

[0014] The determination of whether the intake valve has a first sticking fault according to the inlet end temperature comprises:

[0015] determining whether the inlet end temperature is greater than a preset first temperature threshold, and if so, determining that the intake valve has a first sticking fault.

[0016] In a possible implementation, the fault detection method of the sequential supercharger system further comprises:

[0017] If at least one of the following conditions is met under the working condition that the controlled supercharger does not enter the working state: the outlet end pressure is not less than the first pressure threshold, or the inlet end temperature is not greater than the first temperature threshold, the speed of the controlled supercharger and the speed of the base supercharger are obtained.

[0018] determining whether a preset first sticking condition is met, the first sticking condition comprising: the speed of the controlled supercharger is less than the speed of the base supercharger and the speed difference is greater than a preset first difference threshold;

[0019] If the first sticking condition is met, it is determined that both the exhaust valve and the intake valve have a first sticking fault.

[0020] In a possible implementation, the determination of whether the intake valve has a second sticking fault according to the outlet end pressure comprises:

[0021] determining whether the outlet end pressure of the intake valve is less than a preset second pressure threshold, and if so, determining that the intake valve has a second sticking fault;

[0022] The determination of whether the exhaust valve has a second sticking fault according to at least one of the inlet end temperature or the outlet end pressure comprises:

[0023] determining whether at least one of the following conditions is met: the outlet end pressure of the intake valve is greater than a preset third pressure threshold, or the inlet end temperature is greater than a preset second temperature threshold, and if so, determining that the exhaust valve has a second sticking fault.

[0024] In a possible implementation, the method for detecting faults of the sequential supercharger system further includes:

[0025] In the working condition in which the controlled supercharger enters the working state, if at least one of the following conditions is met:

[0026] the outlet end pressure of the intake valve is not less than a preset second pressure threshold, or the inlet end temperature of the intake valve is not greater than the second temperature threshold, it is determined whether a preset second sticking condition is met, the second sticking condition including that the rotational speed of the controlled supercharger is less than the rotational speed of the base supercharger and the rotational speed difference is greater than a preset second difference threshold.

[0027] If the second sticking condition is met, it is determined that the exhaust valve and the intake valve both have the second sticking fault.

[0028] The second aspect of the present application provides a fault detection device of a sequential supercharger system, the fault detection device being applied to a controller, the controller being in communication with a temperature sensor arranged at an inlet end of an intake valve and a pressure sensor arranged at an outlet end of the intake valve, the intake valve being arranged at an inlet end of a compressor of a controlled supercharger, and the fault detection device of the sequential supercharger system including:

[0029] a pressure and temperature detection unit, configured to acquire the inlet end temperature of the intake valve by the temperature sensor and the outlet end pressure of the intake valve by the pressure sensor;

[0030] a first sticking fault detection unit, configured to, in a working condition in which the controlled supercharger does not enter the working state, determine whether the exhaust valve has a first sticking fault according to the outlet end pressure and whether the intake valve has the first sticking fault according to the inlet end temperature, the first sticking fault being incomplete closing, and the exhaust valve being arranged at an inlet end of a turbine of the controlled supercharger;

[0031] a second sticking fault detection unit, configured to, in a working condition in which the controlled supercharger enters the working state, determine whether the intake valve has a second sticking fault according to the outlet end pressure and whether the exhaust valve has the second sticking fault according to at least one of the inlet end temperature or the outlet end pressure, the second sticking fault being incomplete opening.

[0032] The third aspect of the present application provides a computer program product, including computer readable instructions, when the computer readable instructions run on an electronic device, causing the electronic device to implement the fault detection method of the sequential supercharger system of the first aspect or any implementation manner of the first aspect.

[0033] The fourth aspect of the present application provides an electronic device, including at least one processor and a memory connected with the processor, wherein:

[0034] The memory is configured to store a computer program.

[0035] The processor is configured to execute the computer program, so that the electronic device can implement the fault detection method of the sequential supercharger system of the first aspect or any implementation manner of the first aspect.

[0036] The fifth aspect of the present application provides a computer storage medium, which carries one or more computer programs, and when the one or more computer programs are executed by an electronic device, the electronic device can implement the fault detection method of the sequential supercharger system of the first aspect or any implementation manner of the first aspect.

[0037] By the above technical solution, the fault detection method of the sequential supercharger system and the related device provided by the present application are provided. The method is applied to a controller. The controller is respectively connected in communication with a temperature sensor arranged at an air inlet end of an air inlet valve and a pressure sensor arranged at an air outlet end of the air inlet valve. The fault detection method of the sequential supercharger system includes that the controller acquires the air inlet end temperature of the air inlet valve through the temperature sensor and acquires the air outlet end pressure of the air inlet valve through the pressure sensor. In a working condition in which a controlled supercharger does not enter a working state, whether the exhaust valve has a first sticking fault is judged according to the air outlet end pressure, and whether the air inlet valve has the first sticking fault is judged according to the air inlet end temperature. The first sticking fault is not completely closed. In a working condition in which the controlled supercharger enters the working state, whether the air inlet valve has a second sticking fault is judged according to the air outlet end pressure, and whether the exhaust valve has the second sticking fault is judged according to at least one of the air inlet end temperature or the air outlet end pressure. The second sticking fault is not completely opened. The present application is based on real-time monitoring of the air inlet end temperature and the air outlet end pressure. In different working conditions, the sticking fault detection of each valve in the sequential supercharger system is realized in a targeted manner, and the detection accuracy is improved. BRIEF DESCRIPTION OF DRAWINGS

[0038] The above and other features, advantages, and aspects of the present disclosure will become more apparent by describing in detail the embodiments thereof with reference to the attached drawings. Throughout the drawings, the same or similar reference numerals refer to the same or similar elements. It should be understood that the drawings are schematic, and the sizes of the components and elements are not necessarily drawn to scale.

[0039] Figure 1 A structural schematic diagram of a sequential supercharger system provided by an embodiment of the present application;

[0040] Figure 2 A structural schematic diagram of a fault detection system provided by an embodiment of the present application;

[0041] Figure 3 A structural schematic diagram of a sequential supercharger system provided by an embodiment of the present application;

[0042] Figure 4 A flowchart of a fault detection method of a sequential supercharger system provided by an embodiment of the present application is shown in FIG. 1.

[0043] Figure 5 A flowchart of a fault detection method of a sequential supercharger system provided by an embodiment of the present application is shown in FIG. 1.

[0044] Figure 6 A structural diagram of a sequential supercharger system of a V-type diesel engine provided by an embodiment of the present application is shown in FIG. 2.

[0045] Figure 7 A flowchart of a fault detection method of a sequential supercharger system provided by an embodiment of the present application is shown in FIG. 1.

[0046] Figure 8 A structural diagram of a fault detection device of a sequential supercharger system provided by an embodiment of the present application is shown in FIG. 3.

[0047] Figure 9 A structural diagram of an electronic device provided by an embodiment of the present application is shown in FIG. 4. DETAILED DESCRIPTION

[0048] The embodiments of the present application are described below in conjunction with the drawings of the embodiments of the present application. The terms used in the embodiment part of the present application are only used to explain the specific embodiments of the present application, and are not intended to limit the present application.

[0049] The embodiments of the present application are described below in conjunction with the drawings. It is known to those of ordinary skill in the art that, as technology develops and new scenarios appear, the technical solutions provided by the embodiments of the present application are also applicable to similar technical problems.

[0050] The terms “first”, “second”, and the like in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and do not necessarily describe a specific order or sequence. It should be understood that the terms used in this way can be interchanged under appropriate circumstances, and this is only a distinguishing way used in the description of the embodiments of the present application to describe the objects with the same attributes. In addition, the terms “include” and “have” and any variations thereof are intended to cover non-exclusive inclusion, so that the processes, methods, systems, products or devices containing a series of units do not have to be limited to those units, but can include other units that are not clearly listed or inherent to these processes, methods, products or devices.

[0051] The present application can be applied in the field of engine technology, and specifically applied to the scene of detecting the stuck fault of intake valves and exhaust valves in a sequential supercharger system, Figure 1A structural schematic diagram of a sequential turbocharger system is shown as Figure 1 As shown in the figure, the sequential turbocharger system includes a base turbocharger (also referred to as a normal turbocharger), a controlled turbocharger, and an intake valve and an exhaust valve respectively configured at an air inlet end and an air outlet end of the controlled turbocharger. The intake valve is used to control fresh air to enter the compressor of the controlled turbocharger, and the fresh air enters the intercooler after being pressurized by the compressor. The exhaust valve is used to control exhaust gas from the exhaust pipe to enter the turbine of the controlled turbocharger, and the exhaust gas is discharged into the atmosphere after passing through the turbine. Since, in the sequential turbocharger system, the intake valve controls fresh air to enter the compressor of the turbocharger, and the exhaust valve controls exhaust gas to enter the turbine of the turbocharger, the sticking fault of the intake valve and the exhaust valve will cause abnormal operation of the turbocharger, thereby causing abnormal operation of the engine.

[0052] In the prior art, the sticking of the valve is diagnosed by using a pre-turbine exhaust temperature sensor and a turbocharger speed, but the diagnosis process is complex and the accuracy of the diagnosis result is low.

[0053] Based on the above technical problems, the embodiments of the present application provide a fault detection method of a sequential turbocharger system, which realizes the sticking fault detection of the valve of the sequential turbocharger system by detecting the temperature at the air inlet end of the intake valve and the pressure at the air outlet end of the intake valve in real time, and improves the accuracy of the sticking fault detection result of the intake valve and the exhaust valve.

[0054] The fault detection method of the sequential turbocharger system provided by the embodiments of the present application is applied to an electronic control unit (ECU), Figure 2 A structural schematic diagram of a fault detection system provided by the embodiments of the present application is shown in the figure, and the fault detection system includes an ECU, an intake temperature sensor, and an intake pressure sensor. The intake temperature sensor and the intake pressure sensor are configured at the sequential turbocharger system, Figure 3 A structural schematic diagram of a sequential turbocharger system provided by the embodiments of the present application is shown in the figure, Figure 3 As shown in the figure, the intake temperature sensor is configured at the air inlet end of the intake valve of the sequential turbocharger system, the intake pressure sensor is configured at the air outlet end of the intake valve of the sequential turbocharger system, the ECU is in communication connection with the intake temperature sensor and is used to acquire the temperature signal collected by the intake temperature sensor, and the ECU is in communication connection with the intake pressure sensor and is used to acquire the pressure signal collected by the intake pressure sensor.

[0055] The embodiments of the present application provide a fault detection method of a sequential turbocharger system, and the fault detection method of the sequential turbocharger system provided by the embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0056] Referring to Figure 4 , Figure 4A flowchart of a fault detection method of a sequential supercharger system provided by an embodiment of the present application is shown in FIG. 1, and a data processing method provided by an embodiment of the present application can include S401-S403, which are described in detail as follows. Figure 4

[0057] S401, obtaining the intake end temperature of the intake valve through a temperature sensor and obtaining the outlet end pressure of the intake valve through a pressure sensor.

[0058] S402, in a working condition where the controlled supercharger does not enter a working state, judging whether the exhaust valve has a first stuck fault according to the outlet end pressure and judging whether the intake valve has a first stuck fault according to the intake end temperature.

[0059] In this embodiment, the first stuck fault is incomplete closing.

[0060] S403, in a working condition where the controlled supercharger enters a working state, judging whether the intake valve has a second stuck fault according to the outlet end pressure and judging whether the exhaust valve has a second stuck fault according to at least one of the intake end temperature or the outlet end pressure.

[0061] In this embodiment, the second stuck fault is incomplete opening.

[0062] As can be seen from the above technical solution, the fault detection method of the sequential supercharger system provided by an embodiment of the present application includes that the controller obtains the intake end temperature of the intake valve through a temperature sensor and obtains the outlet end pressure of the intake valve through a pressure sensor; in a working condition where the controlled supercharger does not enter a working state, whether the exhaust valve has a first stuck fault is judged according to the outlet end pressure and whether the intake valve has a first stuck fault is judged according to the intake end temperature; the first stuck fault is incomplete closing; in a working condition where the controlled supercharger enters a working state, whether the intake valve has a second stuck fault is judged according to the outlet end pressure and whether the exhaust valve has a second stuck fault is judged according to at least one of the intake end temperature or the outlet end pressure; the second stuck fault is incomplete opening. Since different types of stuck faults will cause different temperature and pressure abnormal phenomena in different working conditions, the present application realizes the detection of different types of stuck faults of each valve in the sequential supercharger system in different working conditions based on the real-time monitoring of the intake end temperature and the outlet end pressure, thereby improving the detection accuracy.

[0063] In a possible implementation, in a working condition where the controlled supercharger does not enter a working state, whether the outlet end pressure is less than a preset first pressure threshold is judged, if yes, it is determined that the exhaust valve has a first stuck fault, whether the intake end temperature is greater than a preset first temperature threshold is judged, if yes, it is determined that the intake valve has a first stuck fault.

[0064] ​It should be noted that in the working condition that the controlled supercharger does not enter the working state, the controlled supercharger is in a non-working state, the ECU controls the exhaust valve to be closed, and if the pressure at the intake end of the compressor of the supercharger is lower than the first pressure threshold, it indicates that there is airflow at the turbine inlet of the controlled supercharger, that is, the exhaust valve is not completely closed. If the intake valve is not completely closed, the pre-intercooling gas flows back through the intake valve, and the temperature of the pre-intercooling gas is higher than the ambient temperature by 10°C or more, which will cause the temperature at the intake end of the intake valve to be higher than the ambient temperature. Therefore, if it is detected that the temperature at the inlet of the intake valve is higher than the first temperature threshold, it indicates that there is pre-intercooling gas backflow, that is, it can be judged that the intake valve is not completely closed.

[0065] In a possible implementation, in the working condition that the controlled supercharger enters the working state, it is judged whether the outlet end pressure of the intake valve is less than a preset second pressure threshold, and if yes, it is determined that the intake valve has a second sticking fault. It is judged whether at least one of the following conditions is met: the outlet end pressure of the intake valve is greater than a preset third pressure threshold, or the intake end temperature is greater than a preset second temperature threshold, and if yes, it is determined that the exhaust valve has a second sticking fault.

[0066] It should be noted that in the working condition that the controlled supercharger enters the working state, the controlled supercharger enters the working state, and the expected opening degrees of the intake valve and the exhaust valve are both the maximum opening degree. If the outlet end pressure of the intake valve is less than the second pressure threshold, that is, the intake pressure of the compressor of the controlled supercharger is small, it indicates that the intake valve is not completely opened. The outlet end pressure of the intake valve is greater than the third pressure threshold, which indicates that the gas flows back to the intake end of the compressor of the controlled supercharger through the intake valve, so that the intake end pressure of the compressor of the controlled supercharger becomes larger or the intake end temperature of the intake valve becomes higher. Therefore, it is judged that the opening degree of the exhaust valve is less than the maximum opening degree, the turbine intake is too small, and the power is insufficient.

[0067] Referring to Figure 5 , Figure 5 A specific implementation flowchart of a fault detection method of a sequential supercharger system provided by an embodiment of the present application is shown in FIG. 1, and the method comprises the following steps. Figure 5

[0068] S501, when the engine speed is not greater than a preset speed threshold, the outlet end pressure and the intake end temperature of the intake valve are obtained.

[0069] In this embodiment, the speed threshold is the minimum value of the speed at which the controlled supercharger is cut in, that is, when the engine speed is not higher than the speed threshold, the ECU controls the intake valve and the exhaust valve to be closed, so that the controlled supercharger is in a non-working state, and when the engine speed is higher than the speed threshold, the ECU controls the intake valve and the exhaust valve to be opened, so that the controlled supercharger is cut in the working state.

[0070] ​In this embodiment, the temperature of the intake end of the intake valve is acquired by a temperature sensor, and the pressure of the exhaust end of the intake valve is acquired by a pressure sensor.

[0071] S502, it is judged whether the pressure of the exhaust end of the intake valve is less than a preset first pressure threshold.

[0072] In this embodiment, the pressure signal acquired by the intake pressure sensor in real time is acquired to judge whether the pressure of the exhaust end of the intake valve is less than the first pressure threshold.

[0073] In this embodiment, the first pressure threshold is the minimum value of the pressure of the intake end of the compressor in the non-working state of the controlled supercharger, which is calibrated in advance based on the environmental pressure and the actual working condition. For example, when the environmental pressure is 0 kPa, the first pressure threshold can be-3 kPa.

[0074] S503, if yes, it is determined that the exhaust valve has the first sticking fault, and if no, S506 is executed.

[0075] In this embodiment, the first sticking fault is that the exhaust valve is not completely closed, that is, the opening of the exhaust valve is greater than 0.

[0076] It should be noted that when the engine speed is less than the speed threshold, the controlled supercharger is in the non-working state, the ECU controls the exhaust valve to be closed, and if the pressure of the intake end of the compressor of the supercharger is lower than the first pressure threshold, it indicates that there is airflow at the turbine inlet of the controlled supercharger, that is, the exhaust valve is not completely closed.

[0077] S504, it is judged whether the temperature of the intake end of the intake valve is greater than a preset first temperature threshold.

[0078] In this embodiment, the temperature signal acquired by the intake temperature sensor in real time is acquired to judge whether the temperature of the intake end of the intake valve is greater than the first temperature threshold.

[0079] In this embodiment, the first temperature threshold is the maximum value of the temperature of the intake end of the intake valve in the non-working state of the controlled supercharger, which is calibrated in advance based on the environmental temperature and the actual working condition. For example, when the environmental temperature is 25℃, the first temperature threshold can be 40℃. The first sticking fault is that the intake valve is not completely closed, that is, the opening of the intake valve is greater than 0.

[0080] S505, if yes, it is determined that the intake valve has the first sticking fault, and if no, S506 is executed.

[0081] It should be noted that when the engine speed is less than the speed threshold, the controlled supercharger is in a non-working state, and the ECU controls the intake valve to be in a closed state, i.e., the opening degree is equal to 0. If the intake valve is not completely closed, the pre-intercooling gas flows back through the intake valve, and the temperature of the pre-intercooling gas is higher than the ambient temperature by more than 10°C, which will cause the temperature of the intake end of the intake valve to be higher than the ambient temperature. Therefore, if it is detected that the temperature at the inlet of the intake valve is higher than the first temperature threshold, it indicates that there is a pre-intercooling gas backflow, i.e., it can be judged that the intake valve is not completely closed.

[0082] S506, if at least one of the following conditions is met: the temperature of the intake end of the intake valve is not greater than the first temperature threshold, or the pressure of the exhaust end of the intake valve is not less than the first pressure threshold, it is determined whether a preset first sticking condition is met: the speed of the controlled supercharger is less than the speed of the base supercharger, and the speed difference is greater than a preset first difference threshold.

[0083] In this embodiment, the speed difference is the difference between the speed of the base supercharger and the speed of the controlled supercharger, and the first difference threshold is the maximum value of the difference between the speed of the base supercharger and the speed of the controlled supercharger when the controlled supercharger is in a non-working state, which is preset based on the working condition.

[0084] S507, if the first sticking condition is met, it is determined that both the intake valve and the exhaust valve have a first sticking fault.

[0085] It should be noted that when the temperature of the intake end of the intake valve is not greater than the first temperature threshold and the pressure of the exhaust end of the intake valve is not less than the first pressure threshold, i.e., the temperature of the intake end of the intake valve and the pressure of the exhaust end of the intake valve are both within a normal range, if the speed of the controlled supercharger is much less than the speed of the base supercharger, it indicates that both the exhaust valve and the intake valve are not completely closed, i.e., the controlled supercharger is in an abnormal working state.

[0086] S508, when the engine speed is greater than the speed threshold, the temperature of the intake end of the intake valve and the pressure of the exhaust end of the intake valve are obtained.

[0087] S509, it is determined whether the pressure of the exhaust end of the intake valve is less than a preset second pressure threshold.

[0088] S510, if yes, it is determined that the intake valve has a second sticking fault, and if no, S515 is performed.

[0089] In this embodiment, the second pressure threshold is the minimum value of the pressure normal range of the exhaust end of the intake valve when the controlled supercharger is in a normal working state, and the pressure normal range of the exhaust end of the intake valve is preset based on the engine performance and the actual working condition, for example, the pressure normal range is -5kPa-5kPa. Among them, the second pressure threshold is -5kPa, and the third pressure threshold is 5kPa.

[0090] In this embodiment, the second sticking fault is that the intake valve is not fully opened, i.e., the opening degree is less than the maximum opening degree.

[0091] It should be noted that when the engine speed is greater than the speed threshold, the controlled supercharger enters the working state, and the expected opening degrees of the intake valve and the exhaust valve are both the maximum opening degree. If the outlet end pressure of the intake valve is less than the second pressure threshold, i.e., the compressor inlet pressure of the controlled supercharger is small, it indicates that the intake valve is not fully opened.

[0092] S511, it is judged whether the outlet end pressure of the intake valve is greater than a preset third pressure threshold.

[0093] S512, if yes, it is determined that the exhaust valve has the second sticking fault.

[0094] S513, if no, it is judged whether the intake end temperature is greater than a preset second temperature threshold.

[0095] S514, if yes, it is determined that the exhaust valve has the second sticking fault, and if no, S515 is performed.

[0096] In this embodiment, the third pressure threshold is the maximum value of the pressure normal range of the outlet end pressure of the intake valve when the controlled supercharger is in the normal working state, and the second temperature threshold is the maximum value of the intake end temperature of the intake valve in the normal working state of the controlled supercharger, which is calibrated based on the actual working condition and the ambient temperature.

[0097] It should be noted that the outlet end pressure of the intake valve is greater than the third pressure threshold, which indicates that the gas flows back to the compressor inlet of the controlled supercharger through the intake valve, so that the compressor inlet pressure of the controlled supercharger becomes larger or the intake end temperature of the intake valve becomes higher. Therefore, it is judged that the opening degree of the exhaust valve is less than the maximum opening degree, the turbine inlet is too small, and the power is insufficient.

[0098] S515, if at least one of the following conditions is met: the outlet end pressure of the intake valve is in the pressure normal range and the intake end temperature is not greater than the second temperature threshold, it is judged whether a preset second sticking condition is met: the speed of the controlled supercharger is less than the speed of the base supercharger, and the speed difference is greater than a second difference threshold.

[0099] S516, if yes, it is determined that the intake valve and the exhaust valve both have the second sticking fault.

[0100] It should be noted that the intake end temperature of the intake valve and the outlet end pressure of the intake valve are both in the normal range. If the speed of the controlled supercharger is much less than the speed of the base supercharger, it indicates that the exhaust valve and the intake valve are both not fully opened, i.e., the controlled supercharger is in an abnormal working state.

[0101] It should be noted that the embodiments of the present application can be applied to sequential supercharger systems of various specific structures. Figure 6 A schematic diagram of the structure of a sequential supercharger system applied to a V-type diesel engine is shown as follows: Figure 6 As shown, the sequential supercharger system includes a first sequential supercharger subsystem configured on the A side of the V-type diesel engine and a second sequential supercharger subsystem configured on the B side of the V-type diesel engine. The first sequential supercharger subsystem includes a base supercharger (supercharger 1), a controlled supercharger (supercharger 3), an intake valve 1 controlled by relay 1, and an exhaust valve 1 controlled by relay 3. The second sequential supercharger subsystem includes a base supercharger (supercharger 2), a controlled supercharger (supercharger 4), an intake valve 1 controlled by relay 2, and an exhaust valve 2 controlled by relay 4.

[0102] The turbine inlets of superchargers 1 and 3 are both connected to the exhaust pipe of the cylinder on side A, and their outlets are both connected to the inlet of the intercooler on side A. The outlet of the intercooler on side A is connected to the intake pipe of the cylinder on side A. The turbine inlets of superchargers 2 and 4 are both connected to the exhaust pipe of the cylinder on side B, and their outlets are both connected to the inlet of the intercooler on side B. The outlet of the intercooler on side B is connected to the intake pipe of the cylinder on side B.

[0103] Specifically, the compressor inlet of the supercharger 3 is connected to the intake valve 1, and the turbine inlet is connected to the exhaust pipe of the A-side cylinder through the exhaust valve 1. The intake valve 1 controls the fresh air entering the compressor of the supercharger 3, and the fresh air enters the A-side intercooler after being supercharged. The exhaust valve 1 controls the exhaust gas coming out of the exhaust pipe to enter the turbine of the supercharger 3, and the exhaust gas is discharged into the atmosphere after passing through the turbine. The compressor inlet of the supercharger 4 is connected to the intake valve 2, and the turbine inlet is connected to the exhaust pipe of the B-side cylinder through the exhaust valve 2. The intake valve 2 controls the fresh air entering the compressor of the supercharger 4, and the fresh air enters the B-side intercooler after being supercharged. The exhaust valve 2 controls the exhaust gas coming out of the exhaust pipe to enter the turbine of the supercharger 4, and the exhaust gas is discharged into the atmosphere after passing through the turbine.

[0104] It should be noted that engine speed threshold 1 is the threshold at which supercharger 3 intervenes. That is, when the engine speed exceeds engine speed threshold 1, the intake and exhaust valves of supercharger 3 are controlled to open, causing supercharger 3 to intervene in operation. When the engine speed exceeds engine speed threshold 2, the intake and exhaust valves of supercharger 4 are controlled to open, causing supercharger 4 to intervene in operation. Engine speed threshold 2 is greater than engine speed threshold 1. Furthermore, engine speed threshold 2 and engine speed threshold 1 are determined based on engine performance.

[0105] Figure 7 The specific implementation process of a fault detection method for a sequential supercharger system is illustrated as follows: Figure 7 As shown, this method specifically includes:

[0106] 1. When the engine speed is less than the engine speed threshold 1:

[0107] 1.1. If the intake pressure 1 is detected to be less than the pressure threshold 1 (e.g. -3 kPa), it is determined that the exhaust valve 1 has a stuck-closed fault.

[0108] 1.2. If the intake temperature 1 is detected to be greater than the temperature threshold 1 (e.g. 40 °C), it is determined that the intake valve 1 has a stuck-closed fault.

[0109] 1.3. If the intake pressure 1 is detected to be not less than the pressure threshold 1 and the intake temperature 1 is detected to be not greater than the temperature threshold 1, it is determined whether the absolute value of the speed difference between the supercharger 3 and the supercharger 1 is greater than the speed threshold 1. If yes, it is determined that the exhaust valve 1 has a stuck-closed fault and the intake valve 1 has a stuck-closed fault. If no, the fault detection process is ended.

[0110] 2. When the engine speed is greater than the engine speed threshold 1:

[0111] 2.1. If the intake pressure 1 is detected to be less than the pressure threshold 2 (e.g. -5 kPa), it is determined that the intake valve 1 has a stuck-open fault, which causes the intake resistance to be too large and the intake pressure to be too small.

[0112] 2.2. If the intake pressure 1 is detected to be greater than the pressure threshold 3 (e.g. 5 kPa), or the intake temperature 1 is detected to be greater than the temperature threshold 1, it is determined that the exhaust valve is not fully opened or the opening degree is too small, which causes the turbocharger inlet air to be too small, the power to be insufficient, and the intercooler gas to flow back to the compressor inlet of the supercharger 3, causing the intake pressure to be large or the intake temperature 1 to be large.

[0113] 2.3. If the intake pressure 1 is detected to be in the pressure normal range [the pressure threshold 2, the pressure threshold 3] and the intake temperature 1 is detected to be not greater than the temperature threshold 1, it is determined whether the speed of the supercharger 3 is less than the speed of the supercharger 1 and the absolute value of the speed difference is greater than the speed difference threshold 1. If yes, it is determined that the intake valve 1 and the exhaust valve 1 both have a stuck-open fault. If no, the fault detection process is ended.

[0114] It should be noted that the intake temperature 1 is the temperature of the intake valve inlet collected by the intake temperature sensor 1, and the intake pressure 1 is the pressure of the intake valve outlet collected by the intake pressure sensor 1, i.e. the pressure of the compressor inlet of the supercharger 3. The pressure threshold 1 (i.e. the first pressure threshold), the pressure threshold 2 (i.e. the second pressure threshold), the pressure threshold 3 (i.e. the third pressure threshold), and the temperature threshold 1 are all pre-calibrated according to the actual working conditions and the engine performance.

[0115] Specifically, when the engine speed is not greater than the engine speed threshold 1, i.e. the supercharger 3 is not involved, in a non-working state, if there is no stuck fault, the pressure value (i.e. the intake pressure 1) collected by the intake pressure sensor 1 is about 0 kPa (standard ambient pressure), and the pressure normal range is obtained by calibration to be not less than the pressure threshold 1, and the pressure value (i.e. the intake temperature 1) collected by the intake temperature sensor 1 is not higher than the temperature threshold 1. When the engine speed is greater than the engine speed threshold 1, i.e. the supercharger 3 is involved, in a working state, if there is no stuck fault, the intake pressure 1 should be in the pressure normal range [-5 kPa, 5 kPa], and the intake temperature 1 should be in the temperature normal range, i.e. not higher than the temperature threshold 1.

[0116] 3. When the engine speed is not greater than the engine speed threshold 2:

[0117] 3.1. If the intake pressure 2 is detected to be less than the pressure threshold 1 (for example, -3 kPa), it is determined that the exhaust valve 2 has a stuck fault of not being completely closed.

[0118] 3.2. If the intake temperature 2 is detected to be greater than the temperature threshold 1, it is determined that the intake valve 2 has a stuck fault of not being completely closed.

[0119] 3.3. If the intake pressure 2 is detected to be not less than the pressure threshold 1 and the intake temperature 2 is detected to be not greater than the temperature threshold 1, it is judged whether the absolute value of the speed difference between the supercharger 4 and the supercharger 2 exceeds the speed threshold 1. If yes, it is determined that the exhaust valve 2 has a stuck fault of not being completely closed and the intake valve 2 has a stuck fault of not being completely closed. If no, the fault detection process is ended.

[0120] 4. When the engine speed reaches the engine speed threshold 1:

[0121] 4.1. If the intake pressure 2 is detected to be less than the pressure threshold 2 (for example, -5 kPa), it is determined that the intake valve 1 has a stuck fault of not being completely opened, resulting in excessive intake resistance and too small intake pressure.

[0122] 4.2. If the intake pressure 2 is detected to be greater than the pressure threshold 3 (for example, 5 kPa), or the intake temperature 2 is detected to be greater than the temperature threshold 1, it is determined that the exhaust valve is not completely opened or the opening degree is too small, resulting in too small intake at the turbine end, insufficient power, and reverse flow of the intercooler gas to the compressor intake end of the supercharger 4, causing the intake pressure to increase or the intake temperature 2 to increase.

[0123] 4.3, if the intake pressure 2 is in the pressure normal range [pressure threshold 2, pressure threshold 3] and the intake temperature 2 is not greater than the temperature threshold 1, it is detected whether the rotation speed of the supercharger 4 is less than the rotation speed of the supercharger 1, and the absolute value of the rotation speed difference is greater than the rotation speed difference threshold 1, if yes, it is judged that the intake valve 1 and the exhaust valve 1 both exist the incomplete opening sticking fault, if not, the fault detection process is ended.

[0124] It should be noted that the intake temperature 2 is the intake valve inlet temperature collected by the intake temperature sensor 2, the intake pressure 2 is the intake valve outlet pressure collected by the intake pressure sensor 2, that is, the pressure of the supercharger 4 compressor inlet. When the engine speed is not greater than the engine speed threshold 2, that is, the supercharger 4 is not involved, in the non-working state, if there is no sticking fault, the pressure value collected by the intake pressure sensor 2 (that is, the intake pressure 2) is about 0kPa (standard ambient pressure), and the normal pressure range is obtained by calibration, which is not less than the pressure threshold 1, and the pressure value collected by the intake temperature sensor 2 (that is, the intake temperature 2) is not higher than the temperature threshold 1. When the engine speed is greater than the engine speed threshold 2, that is, the supercharger 4 is involved, in the working state, if there is no sticking fault, the intake pressure 2 should be in the pressure normal range [-5kPa, 5kPa], and the intake temperature 2 should be in the temperature normal range, that is, not higher than the temperature threshold 1.

[0125] The above introduces a fault detection method of a sequential supercharger system provided by the embodiment of the application, and the following will introduce a device for executing the fault detection method of the sequential supercharger system.

[0126] Please refer to Figure 8 , Figure 8 The structure diagram of a fault detection device of a sequential supercharger system provided by the embodiment of the application. As Figure 8 shown, the fault detection device 800 of the sequential supercharger system comprises:

[0127] The pressure temperature detection unit 801 is configured to acquire the intake end temperature of the intake valve through the temperature sensor and acquire the outlet end pressure of the intake valve through the pressure sensor.

[0128] The first sticking fault detection unit 802 is configured to, in the working condition that the controlled supercharger does not enter the working state, judge whether the exhaust valve exists the first sticking fault according to the outlet end pressure and judge whether the intake valve exists the first sticking fault according to the intake end temperature; the first sticking fault is incomplete closing.

[0129] The second sticking fault detection unit 803 is configured to determine whether the intake valve has a second sticking fault according to the outlet end pressure and determine whether the exhaust valve has a second sticking fault according to at least one of the inlet end temperature or the outlet end pressure in a working condition in which the controlled supercharger enters the working state, and the second sticking fault is incomplete opening.

[0130] In a possible implementation, the fault detection device of the sequential supercharger system further includes a state detection unit configured to:

[0131] monitor the engine speed;

[0132] if the engine speed is not greater than a preset speed threshold, determine that the controlled supercharger does not enter the working state

[0133] if the engine speed is greater than the speed threshold, determine that the controlled supercharger enters the working state.

[0134] In a possible implementation, the first sticking fault detection unit is configured to, when determining whether the exhaust valve has a first sticking fault according to the outlet end pressure, specifically configured to:

[0135] determine whether the outlet end pressure is less than a preset first pressure threshold, and if yes, determine that the exhaust valve has a first sticking fault;

[0136] the determination of whether the intake valve has a first sticking fault according to the inlet end temperature includes:

[0137] determining whether the inlet end temperature is greater than a preset first temperature threshold, and if yes, determining that the intake valve has a first sticking fault.

[0138] In a possible implementation, the first sticking fault detection unit is further configured to:

[0139] in a working condition in which the controlled supercharger does not enter the working state, if at least one of the following conditions is met: the outlet end pressure is not less than the first pressure threshold, or the inlet end temperature is not greater than the first temperature threshold, acquire the speed of the controlled supercharger and the speed of the base supercharger;

[0140] determine whether a preset first sticking condition is met, and the first sticking condition includes that the speed of the controlled supercharger is less than the speed of the base supercharger and the speed difference is greater than a preset first difference threshold;

[0141] if the first sticking condition is met, determine that the exhaust valve and the intake valve both have a first sticking fault.

[0142] In a possible implementation, the second sticking fault detection unit is configured to determine whether the intake valve has the second sticking fault according to the outlet pressure of the intake valve, and specifically configured to:

[0143] determine whether the outlet pressure of the intake valve is less than a preset second pressure threshold, and if yes, determine that the intake valve has the second sticking fault;

[0144] the determination of whether the exhaust valve has the second sticking fault according to at least one of the outlet temperature of the intake valve or the outlet pressure of the intake valve, comprises:

[0145] determining whether at least one of the outlet pressure of the intake valve is greater than a preset third pressure threshold or the outlet temperature of the intake valve is greater than a preset second temperature threshold is met, and if yes, determining that the exhaust valve has the second sticking fault.

[0146] In a possible implementation, the second sticking fault detection unit is further configured to:

[0147] in the working condition in which the controlled supercharger enters the working state, if at least one of the outlet pressure of the intake valve is not less than the preset second pressure threshold or the outlet temperature of the intake valve is not greater than the second temperature threshold is met, determining whether a preset second sticking condition is met, the second sticking condition comprising that the rotational speed of the controlled supercharger is less than the rotational speed of the base supercharger and the rotational speed difference is greater than a preset second difference threshold;

[0148] if the second sticking condition is met, determining that the exhaust valve and the intake valve both have the second sticking fault.

[0149] The embodiments of the present application also provide an electronic device. Referring to FIG. 1, Figure 9 which shows a structural schematic diagram suitable for implementing the electronic device in the embodiments of the present application. The electronic device in the embodiments of the present application can include but is not limited to an MCU configured in a vehicle central control system. Figure 9 The electronic device shown in FIG. 1 is merely an example, and should not bring any limitation to the functions and use range of the embodiments of the present application.

[0150] As shown in FIG. 2, Figure 9 the electronic device can include a processing device (for example, a central processing unit, a graphics processing unit, etc.) 901, which can perform various appropriate actions and processes according to programs stored in a read-only memory (ROM) 902 or loaded from a storage device 908 into a random access memory (RAM) 903. In the state that the electronic device is powered on, the RAM 903 also stores various programs and data required for the operation of the electronic device. The processing device 901, the ROM 902 and the RAM 903 are connected to each other through a bus 904. An input / output (I / O) interface 905 is also connected to the bus 904.

[0151] In general, the following devices can be connected to the I / O interface 905: input devices 906 including, for example, a touch screen, a touch pad, a keyboard, a mouse, a camera, a microphone, an accelerometer, a gyroscope, and the like; output devices 907 including, for example, a liquid crystal display (LCD), a speaker, a vibrator, and the like; storage devices 908 including, for example, a memory card, a hard disk, and the like; and communication devices 909. The communication devices 909 can allow the electronic device to communicate wirelessly or wiredly with other devices to exchange data. Although Figure 9 The electronic device is shown with various devices, but it is understood that all of the shown devices are not required to be implemented or present. More or fewer devices can alternatively be implemented or present.

[0152] The embodiment of the present application further provides a computer program product comprising computer readable instructions, which, when executed on an electronic device, cause the electronic device to implement any one of the fault detection methods of the sequential supercharger system provided by the embodiments of the present application.

[0153] The embodiment of the present application further provides a computer readable storage medium, which carries one or more computer programs, and when the one or more computer programs are executed by an electronic device, the electronic device can implement any one of the fault detection methods of the sequential supercharger system provided by the embodiments of the present application.

[0154] In addition, it should be noted that the device embodiments described above are only schematic, and the units described as separate components can or can not be physically separate, and the components shown as units can or can not be physical units, i.e. they can be located in one place, or distributed on multiple network units. Part or all of the modules can be selected according to actual needs to achieve the purpose of the present embodiment. In addition, the connection relationship between the modules in the device embodiment provided by the present application indicates that there is a communication connection between them, which can be implemented as one or more communication buses or signal lines.

[0155] Those skilled in the art can clearly understand that the application can be implemented by means of software plus necessary universal hardware, and of course can also be implemented by means of dedicated hardware including special integrated circuit, special CPU, special memory, special component, etc. Generally, any function completed by computer program can be easily implemented by corresponding hardware, and the specific hardware structure for implementing the same function can also be various, such as analog circuit, digital circuit or special circuit, etc. However, for the application, software program implementation is a better embodiment. Based on such understanding, the technical solution of the application or the part of the application which makes contribution to the prior art can be embodied in the form of software product, which is stored in readable storage medium, such as computer floppy disk, U disk, mobile hard disk, ROM, RAM, magnetic disk or optical disk, etc., and includes a plurality of instructions for making a computer device (which can be personal computer, training device or network device, etc.) execute the method described in various embodiments of the application.

[0156] In the above embodiments, the implementation can be achieved by software, hardware, firmware or any combination thereof, entirely or partially. When implemented by software, the implementation can be achieved in the form of a computer program product, entirely or partially.

[0157] The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the flow or function described in the embodiments of the application is generated entirely or partially. The computer can be a general-purpose computer, a special-purpose computer, a computer network or other programmable device. The computer instructions can be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another, for example, the computer instructions can be transmitted from one website, computer, training device or data center to another website, computer, training device or data center through wired (such as coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (such as infrared, wireless, microwave, etc.) mode. The computer-readable storage medium can be any available medium that can be stored by a computer or a data storage device such as a training device, a data center, etc. integrated with one or more available media sets. The available medium can be a magnetic medium (such as a floppy disk, a hard disk, a magnetic tape), an optical medium (such as a DVD), or a semiconductor medium (such as a solid state disk (SSD)), etc.

Claims

1. A method of fault detection for a sequential turbocharger system, characterized by, The application is applied to a controller, which is connected with a temperature sensor arranged at an intake end of an intake valve and a pressure sensor arranged at an exhaust end of the intake valve, and the intake valve is arranged at an intake end of a compressor of a controlled supercharger. The fault detection method of the sequential supercharger system comprises the following steps: obtaining the temperature at the intake end of the intake valve through the temperature sensor and obtaining the pressure at the exhaust end of the intake valve through the pressure sensor; in a working condition in which the controlled supercharger is not in a working state, judging whether the exhaust valve has a first sticking fault according to the pressure at the exhaust end and judging whether the intake valve has the first sticking fault according to the temperature at the intake end, wherein the first sticking fault is that the exhaust valve is not completely closed, and the exhaust valve is arranged at an intake end of a turbine of the controlled supercharger; in a working condition in which the controlled supercharger is in the working state, judging whether the intake valve has a second sticking fault according to the pressure at the exhaust end and judging whether the exhaust valve has the second sticking fault according to at least one of the temperature at the intake end or the pressure at the exhaust end, wherein the second sticking fault is that the intake valve is not completely opened.

2. The method of fault detection of a sequential turbocharger system according to claim 1, characterized in that, The fault detection method of the sequential supercharger system further comprises the following steps: monitoring an engine speed; if the engine speed is not greater than a preset speed threshold, determining that the controlled supercharger is not in the working state; if the engine speed is greater than the speed threshold, determining that the controlled supercharger is in the working state.

3. The method of fault detection of a sequential turbocharger system according to claim 1, characterized in that, The step of judging whether the exhaust valve has the first sticking fault according to the pressure at the exhaust end comprises the following steps: judging whether the pressure at the exhaust end is less than a preset first pressure threshold, and if yes, determining that the exhaust valve has the first sticking fault. The step of judging whether the intake valve has the first sticking fault according to the temperature at the intake end comprises the following steps: judging whether the temperature at the intake end is greater than a preset first temperature threshold, and if yes, determining that the intake valve has the first sticking fault.

4. The method of fault detection of a sequential turbocharger system according to claim 3, characterized in that, The fault detection method of the sequential supercharger system further comprises the following steps: in the working condition in which the controlled supercharger is not in the working state, if at least one of the following conditions is met, obtaining a speed of the controlled supercharger and a speed of a base supercharger: the pressure at the exhaust end is not less than the first pressure threshold or the temperature at the intake end is not greater than the first temperature threshold; judging whether a preset first sticking condition is met, wherein the first sticking condition comprises that the speed of the controlled supercharger is less than the speed of the base supercharger and a speed difference is greater than a preset first difference threshold; if the first sticking condition is met, determining that the exhaust valve and the intake valve both have the first sticking fault.

5. The method of fault detection of a sequential turbocharger system according to claim 1, characterized in that, The step of judging whether the intake valve has the second sticking fault according to the pressure at the exhaust end comprises the following steps: judging whether the pressure at the exhaust end of the intake valve is less than a preset second pressure threshold, and if yes, determining that the intake valve has the second sticking fault. The step of judging whether the exhaust valve has the second sticking fault according to at least one of the temperature at the intake end or the pressure at the exhaust end comprises the following steps: determining that the exhaust valve has the second sticking fault if at least one of the following conditions is met: the outlet end pressure of the intake valve is greater than a preset third pressure threshold, or the inlet end temperature of the intake valve is greater than a preset second temperature threshold.

6. The method of fault detection of a sequential turbocharger system according to claim 5, characterized in that, The fault detection method of the sequential supercharger system further comprises: In the working condition in which the controlled supercharger enters a working state, if at least one of the following conditions is met: The outlet end pressure of the intake valve is not less than a preset second pressure threshold, or the inlet end temperature of the intake valve is not greater than the second temperature threshold, it is determined whether a preset second sticking condition is met, and the second sticking condition comprises: the rotating speed of the controlled supercharger is less than the rotating speed of the base supercharger, and the rotating speed difference is greater than a preset second difference threshold. If the second sticking condition is met, it is determined that the exhaust valve and the intake valve both have the second sticking fault.

7. A failure detection device for a sequential turbocharger system, characterized by comprising: The fault detection device of the sequential supercharger system comprises: A pressure and temperature detection unit configured to acquire the inlet end temperature of the intake valve through the temperature sensor and acquire the outlet end pressure of the intake valve through the pressure sensor; A first sticking fault detection unit configured to, in a working condition in which the controlled supercharger does not enter a working state, determine whether the exhaust valve has a first sticking fault according to the outlet end pressure and determine whether the intake valve has the first sticking fault according to the inlet end temperature; the first sticking fault is incomplete closing, and the exhaust valve is arranged at the turbine inlet end of the controlled supercharger; A second sticking fault detection unit configured to, in a working condition in which the controlled supercharger enters a working state, determine whether the intake valve has a second sticking fault according to the outlet end pressure and determine whether the exhaust valve has the second sticking fault according to at least one of the inlet end temperature or the outlet end pressure; the second sticking fault is incomplete opening.

8. A computer program product, characterised in that, The computer readable instructions, when executed on an electronic device, cause the electronic device to implement the fault detection method of the sequential supercharger system according to any one of claims 1 to 6.

9. An electronic device, comprising: The memory is configured to store a computer program, and the processor is configured to execute the computer program to enable the electronic device to implement the fault detection method of the sequential supercharger system according to any one of claims 1 to 6. The storage medium carries one or more computer programs, and when the one or more computer programs are executed by an electronic device, the electronic device can implement the fault detection method of the sequential supercharger system according to any one of claims 1 to 6. ​ 10. A computer storage medium, characterized in that, ​

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