Stuck fault detection method, stuck fault processing method and related device

Abstract

The present application discloses a method for detecting a stuck fault, a method for handling a stuck fault, and related devices, and relates to the field of engine technology. The method for detecting a stuck fault comprises: when the engine is in a high-load steady-state condition, entering a fault detection state, obtaining a driving duty cycle of an electric pressure regulating valve in the fault detection state, obtaining an upper limit value of the driving duty cycle of the electric pressure regulating valve under the current condition, and if the driving duty cycle of the electric pressure regulating valve is greater than the upper limit value under the current condition, and the absolute value of the difference between the two is greater than a preset value or the driving duty cycle of the electric pressure regulating valve is 100%, it is determined that the electric pressure regulating valve has a stuck fault. The technical solution disclosed in the present application can detect whether the electric pressure regulating valve has a stuck fault without disassembling the engine.

Description

Technical Field

[0001] The present application belongs to the field of engine technology, and in particular relates to a method for detecting a stuck fault, a method for handling a stuck fault, and related devices. Background Art

[0002] The turbocharger is an important part of the engine's air intake system. The turbocharger includes a turbine and a compressor. The turbine is set on the engine's exhaust pipe, and the compressor is set on the engine's intake pipe. The turbine and the compressor are connected through an intermediate body. The exhaust gas discharged by the engine enters the turbine, drives the turbine in the turbine to rotate, and then drives the impeller in the compressor to rotate through the intermediate body. The impeller pressurizes the air in the intake pipe, and the pressurized air enters the engine's cylinder.

[0003] In order to protect the turbocharger, a bypass pipeline is set between the air inlet and outlet of the turbine, and a bleed valve is set on the bypass pipeline. When the pressure in the compressor is too high, the bleed valve is opened to allow part of the exhaust gas to be discharged directly without passing through the turbine, so as to reduce the speed of the turbine and thus reduce the pressure in the compressor.

[0004] The bleed valve usually adopts a pneumatic regulating valve. In order to achieve precise control of the bleed valve, an electric pressure regulating valve is set for the bleed valve. The air inlet of the electric pressure regulating valve is connected to the air source, and the air outlet is connected to the control port of the bleed valve. By adjusting the opening of the electric pressure regulating valve, the pressure of the gas entering the control port of the bleed valve is controlled, thereby adjusting the opening of the bleed valve.

[0005] If the electric pressure regulating valve is stuck, it will directly affect the opening adjustment of the exhaust valve. How to detect whether the electric pressure regulating valve is stuck without disassembling the engine is a problem that needs to be solved urgently by those skilled in the art. Summary of the invention

[0006] In view of this, the purpose of the present application is to provide a method for detecting a stuck fault and a related device, which can detect whether an electric pressure regulating valve has a stuck fault without disassembling the engine. The present application also provides a method for handling a stuck fault and a related device, which can detect whether an electric pressure regulating valve has a stuck fault without disassembling the engine, and provide a solution for eliminating the stuck fault of the electric pressure regulating valve.

[0007] To achieve the above objectives, this application provides the following technical solutions:

[0008] A first aspect of the present application provides a method for detecting a stuck fault, wherein an air inlet of an electric pressure regulating valve is connected to an air source, and an air outlet of the electric pressure regulating valve is connected to a control port of an air bleed valve of a turbocharger, and the method for detecting a stuck fault comprises:

[0009] Obtaining engine operating parameters;

[0010] Entering a fault detection state when the operating parameters of the engine indicate that the engine is in a high-load steady-state operating condition;

[0011] In the fault detection state, the driving duty ratio of the electric pressure regulating valve is obtained, and the upper limit value of the driving duty ratio of the electric pressure regulating valve in the current working condition is determined, wherein the driving duty ratio of the electric pressure regulating valve is adjusted based on the actual pressure of the intake manifold of the engine and the target pressure, and when the actual pressure of the intake manifold is greater than the target pressure, the driving duty ratio of the electric pressure regulating valve is gradually increased;

[0012] If the driving duty cycle of the electric pressure regulating valve is greater than the upper limit value under the current working condition, and the absolute value of the difference between the two is greater than a preset value or the driving duty cycle of the electric pressure regulating valve is 100%, it is determined that the electric pressure regulating valve has a stuck fault.

[0013] In a possible implementation, when the operating parameters of the engine meet the following conditions, it is determined that the engine is in a high-load steady-state operating condition:

[0014] The actual speed of the engine is greater than the first speed threshold, the actual fuel injection amount of the engine is greater than the first fuel injection amount threshold, the actual speed change rate of the engine is less than the first change rate threshold, and the actual fuel injection amount change rate of the engine is less than the second change rate threshold.

[0015] In a possible implementation, determining the upper limit value of the driving duty cycle of the electric pressure regulating valve under the current working condition includes:

[0016] Obtaining current operating parameters, wherein the operating parameters include environmental parameters and operating parameters of the engine;

[0017] Based on the pre-established correspondence between the operating condition parameter and the upper limit value of the driving duty cycle, the upper limit value of the driving duty cycle corresponding to the current operating condition parameter is obtained.

[0018] A second aspect of the present application provides a method for handling a stuck fault, wherein an air inlet of an electric pressure regulating valve is connected to an air source, and an air outlet of the electric pressure regulating valve is connected to a control port of an air bleed valve of a turbocharger, and the method for handling a stuck fault comprises:

[0019] Obtaining engine operating parameters;

[0020] Entering a fault detection state when the operating parameters of the engine indicate that the engine is in a high-load steady-state operating condition;

[0021] In the fault detection state, the driving duty ratio of the electric pressure regulating valve is obtained, and the upper limit value of the driving duty ratio of the electric pressure regulating valve in the current working condition is determined, wherein the driving duty ratio of the electric pressure regulating valve is adjusted based on the actual pressure of the intake manifold of the engine and the target pressure, and when the actual pressure of the intake manifold is greater than the target pressure, the driving duty ratio of the electric pressure regulating valve is gradually increased;

[0022] If the driving duty cycle of the electric pressure regulating valve is greater than the upper limit value under the current working condition, and the absolute value of the difference between the two is greater than a preset value or the driving duty cycle of the electric pressure regulating valve is 100%, it is determined that the electric pressure regulating valve has a stuck fault;

[0023] After the engine is powered off, within a first period of time, the driving duty ratio of the electric pressure regulating valve is controlled to change back and forth between a first value and a second value, so that the valve core of the electric pressure regulating valve reciprocates in the valve seat.

[0024] In a possible implementation, the method further includes:

[0025] After the first period, the engine is in a running state, performing a stuck fault detection again to determine whether the stuck fault of the electric pressure regulating valve is eliminated;

[0026] When it is determined that the sticking fault of the electric pressure regulating valve has not been eliminated, after the engine is powered off, within a second time period, the driving duty cycle of the electric pressure regulating valve is controlled to vary back and forth between the first value and the second value, so that the valve core of the electric pressure regulating valve reciprocates in the valve seat, wherein the current value applied to the electric pressure regulating valve within the second time period is greater than the current value applied to the electric pressure regulating valve within the first time period.

[0027] In a possible implementation, the method further includes:

[0028] After the second period, the engine is running, performing a stuck fault detection again to determine whether the stuck fault of the electric pressure regulating valve is eliminated;

[0029] When it is determined that the sticking fault of the electric pressure regulating valve has not been eliminated, an alarm message is output.

[0030] A third aspect of the present application provides a stuck fault detection device, wherein an air inlet of an electric pressure regulating valve is connected to an air source, and an air outlet of the electric pressure regulating valve is connected to a control port of an air bleed valve of a turbocharger, and the stuck fault detection device comprises:

[0031] An operating parameter acquisition module is used to obtain the operating parameters of the engine;

[0032] A state decision module, configured to enter a fault detection state when the operating parameters of the engine indicate that the engine is in a high-load steady-state operating condition;

[0033] an upper limit value determination module, configured to obtain the driving duty ratio of the electric pressure regulating valve in the fault detection state, and determine the upper limit value of the driving duty ratio of the electric pressure regulating valve in the current working condition, wherein the driving duty ratio of the electric pressure regulating valve is adjusted based on the actual pressure of the intake manifold of the engine and the target pressure, and when the actual pressure of the intake manifold is greater than the target pressure, the driving duty ratio of the electric pressure regulating valve is gradually increased;

[0034] A stuck fault determination module is used to determine that the electric pressure regulating valve has a stuck fault when the driving duty cycle of the electric pressure regulating valve is greater than the upper limit value under the current working conditions and the absolute value of the difference between the two is greater than a preset value or the driving duty cycle of the electric pressure regulating valve is 100%.

[0035] A fourth aspect of the present application provides a stuck fault processing device, wherein an air inlet of an electric pressure regulating valve is connected to an air source, and an air outlet of the electric pressure regulating valve is connected to a control port of an air bleed valve of a turbocharger, and the stuck fault processing device comprises:

[0036] An operating parameter acquisition module is used to obtain the operating parameters of the engine;

[0037] A state decision module, configured to enter a fault detection state when the operating parameters of the engine indicate that the engine is in a high-load steady-state operating condition;

[0038] an upper limit value determination module, configured to obtain the driving duty ratio of the electric pressure regulating valve in the fault detection state, and determine the upper limit value of the driving duty ratio of the electric pressure regulating valve in the current working condition, wherein the driving duty ratio of the electric pressure regulating valve is adjusted based on the actual pressure of the intake manifold of the engine and the target pressure, and when the actual pressure of the intake manifold is greater than the target pressure, the driving duty ratio of the electric pressure regulating valve is gradually increased;

[0039] a stuck fault determination module, configured to determine that the electric pressure regulating valve has a stuck fault when the driving duty cycle of the electric pressure regulating valve is greater than the upper limit value under the current working condition and the absolute value of the difference between the two is greater than a preset value or the driving duty cycle of the electric pressure regulating valve is 100%;

[0040] The first fault processing module is used to control the driving duty ratio of the electric pressure regulating valve to change back and forth between a first value and a second value within a first time period after the engine is powered off, so that the valve core of the electric pressure regulating valve reciprocates in the valve seat.

[0041] A fifth aspect of the present application provides an electronic device, comprising at least one processor and a memory connected to the processor, wherein:

[0042] The memory is used to store computer programs;

[0043] The processor is used to execute the computer program so that the electronic device can implement any one of the above-mentioned stuck fault detection methods, or implement any one of the above-mentioned stuck fault processing methods.

[0044] The sixth aspect of the present application is a computer storage medium, which carries one or more computer programs. When the one or more computer programs are executed by an electronic device, the electronic device can implement any of the above-mentioned stuck fault detection methods, or implement any of the above-mentioned stuck fault processing methods.

[0045] A seventh aspect of the present application is a computer program product, comprising computer-readable instructions, which, when executed on an electronic device, enables the electronic device to implement any one of the above-mentioned stuck fault detection methods, or implement any one of the above-mentioned stuck fault processing methods.

[0046] It can be seen that the beneficial effects of this application are:

[0047] The stuck fault detection method disclosed in the present application is based on the finding that under the same high-load steady-state operating condition, the driving duty cycle of the electric pressure regulating valve when a stuck fault occurs will be greater than the driving duty cycle of the electric pressure regulating valve when no stuck fault occurs. When the engine is in a high-load steady-state operating condition, the method enters a fault detection state. In the fault detection state, the driving duty cycle of the electric pressure regulating valve is obtained, and the upper limit value of the driving duty cycle of the electric pressure regulating valve under the current operating condition is obtained. If the driving duty cycle of the electric pressure regulating valve is greater than the upper limit value under the current operating condition, and the absolute value of the difference between the two is greater than a preset value or the driving duty cycle of the electric pressure regulating valve is 100%, it is determined that the electric pressure regulating valve has a stuck fault. The method can detect whether the electric pressure regulating valve has a stuck fault without disassembling the engine.

[0048] The sticking fault handling method disclosed in the present application can detect whether an electric pressure regulating valve has a sticking fault without disassembling the engine; in addition, when it is determined that the electric pressure regulating valve has a sticking fault, after the engine is powered off, within a first time period, the driving duty ratio of the electric pressure regulating valve is controlled to vary back and forth between a first value and a second value, so that the valve core of the electric pressure regulating valve reciprocates in the valve seat, and by means of the reciprocating motion of the valve core, foreign matter that is stuck in the valve core may be shaken off, thereby eliminating the sticking fault of the electric pressure regulating valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0050] Figure 1 A flowchart of a stuck fault detection method disclosed in the present application;

[0051] Figure 2 A flowchart of a method for handling a stuck fault disclosed in the present application;

[0052] Figure 3 It is a structural schematic diagram of a stuck fault detection device disclosed in the present application;

[0053] Figure 4 It is a structural schematic diagram of a stuck fault processing device disclosed in the present application;

[0054] Figure 5 This is a hardware structure diagram of an electronic device disclosed in this application. DETAILED DESCRIPTION

[0055] The embodiments of the present application are described below in conjunction with the accompanying drawings. Those skilled in the art will appreciate that, with the development of technology and the emergence of new scenarios, the technical solutions provided in the embodiments of the present application are also applicable to similar technical problems.

[0056] The terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and need not be used to describe a specific order or sequential order. It should be understood that the terms used in this way can be interchangeable under appropriate circumstances, which is only to describe the distinction mode adopted by the objects of the same attributes when describing in the embodiments of the present application. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, so that the process, method, system, product or equipment comprising a series of units need not be limited to those units, but may include other units that are not clearly listed or inherent to these processes, methods, products or equipment.

[0057] The engine intake system includes a turbocharger. The turbocharger includes a turbine and a compressor. The turbine is arranged on the exhaust pipe of the engine, and the compressor is arranged on the intake pipe of the engine. The turbine and the compressor are connected through an intermediate body. The exhaust gas discharged by the engine enters the turbine, drives the turbine in the turbine to rotate, and then drives the impeller in the compressor to rotate through the intermediate body. The impeller pressurizes the air in the intake pipe, and the pressurized air enters the cylinder of the engine.

[0058] A bypass pipeline is provided between the air inlet and the air outlet of the turbine, and a bleed valve is provided on the bypass pipeline. When the pressure in the compressor is too high, the bleed valve is opened so that part of the exhaust gas is discharged directly without passing through the turbine, so as to reduce the speed of the turbine and further reduce the pressure in the compressor. The bleed valve usually adopts a pneumatic regulating valve. In order to achieve precise control of the bleed valve, an electric pressure regulating valve is provided for the bleed valve. The air inlet of the electric pressure regulating valve is connected to the air source, and the air outlet is connected to the control port of the bleed valve. By adjusting the opening of the electric pressure regulating valve, the pressure of the gas entering the control port of the bleed valve is controlled, thereby adjusting the opening of the bleed valve.

[0059] The present application provides a method for detecting a stuck fault and a related device, which can detect whether an electric pressure regulating valve has a stuck fault without disassembling the engine. The present application also provides a method for handling a stuck fault and a related device, which can detect whether an electric pressure regulating valve has a stuck fault without disassembling the engine, and provide a solution for eliminating the stuck fault of the electric pressure regulating valve.

[0060] See also Figure 1 , Figure 1 This is a flow chart of a stuck fault detection method disclosed in this application. The method comprises:

[0061] S101: Obtaining engine operating parameters.

[0062] S102: When the operating parameters of the engine indicate that the engine is in a high-load steady-state operating condition, entering a fault detection state.

[0063] Based on the operating parameters of the engine, the load state of the engine can be determined, and whether the engine is in a steady state can be determined. When it is determined that the engine is in a high-load steady state, a fault detection state is entered to determine whether the electric pressure regulating valve has a stuck fault.

[0064] As an optional solution, obtaining the operating parameters of the engine includes: obtaining the actual speed of the engine. Accordingly, when the operating parameters of the engine meet the following conditions, it is determined that the engine is in a high-load steady-state condition: the actual speed of the engine is greater than a first speed threshold, and the actual speed change rate of the engine is less than the first change rate threshold.

[0065] As another optional solution, obtaining the operating parameters of the engine includes: obtaining the actual speed and actual fuel injection amount of the engine. Accordingly, when the operating parameters of the engine meet the following conditions, it is determined that the engine is in a high-load steady-state condition: the actual speed of the engine is greater than a first speed threshold, the actual fuel injection amount of the engine is greater than the first fuel injection amount threshold, the actual speed change rate of the engine is less than the first change rate threshold, and the actual fuel injection amount change rate of the engine is less than the second change rate threshold.

[0066] It should be noted that the first speed threshold, the first fuel injection amount threshold, the first change rate threshold and the second change rate threshold in the above two solutions are values ​​determined based on multiple tests.

[0067] S103: In a fault detection state, obtaining a driving duty cycle of the electric pressure regulating valve, and determining an upper limit value of the driving duty cycle of the electric pressure regulating valve under a current working condition.

[0068] Among them, the control device adjusts the driving duty cycle of the electric pressure regulating valve in the following manner: the driving duty cycle of the electric pressure regulating valve is adjusted based on the actual pressure of the intake manifold of the engine and the target pressure, and when the actual pressure of the intake manifold is greater than the target pressure, the driving duty cycle of the electric pressure regulating valve is gradually increased.

[0069] Here the relationship between the driving duty cycle of the electric pressure regulating valve and the actual pressure of the intake manifold is explained: increase the driving duty cycle of the electric pressure regulating valve - increase the opening of the electric pressure regulating valve - increase the outlet pressure of the electric pressure regulating valve - increase the opening of the bleed valve - reduce the exhaust gas passing through the turbine - reduce the pressure of the intake manifold; reduce the driving duty cycle of the electric pressure regulating valve - reduce the opening of the electric pressure regulating valve - reduce the outlet pressure of the electric pressure regulating valve - reduce the opening of the bleed valve - increase the exhaust gas passing through the turbine - increase the pressure of the intake manifold.

[0070] The opening of the valve refers to the position of the valve core (or valve plate) when the valve core (or valve plate) changes the throttling area of ​​the flow channel. It is usually expressed as a percentage, and can also be understood as the percentage of the cross-sectional area that can flow. The closed state is usually understood to be 0% and the fully open state is 100%.

[0071] The control device adjusts the driving duty ratio of the electric pressure regulating valve with the goal of making the actual pressure of the intake manifold reach the target pressure. The control device obtains the actual pressure of the intake manifold of the engine, obtains the target pressure of the intake manifold of the engine, and performs PID (proportional integral differential) control based on the actual pressure of the intake manifold and the target pressure to adjust the driving duty ratio of the electric pressure regulating valve.

[0072] The actual pressure of the intake manifold can be obtained by a pressure detection component arranged in the intake manifold.

[0073] The target intake manifold pressure is determined based on the engine operating parameters.

[0074] As an optional solution, the target pressure of the intake manifold is determined based on the actual speed of the engine. Optionally, a correspondence between the speed of the engine and the target pressure of the intake manifold is pre-established, and the target pressure of the intake manifold is determined based on the actual speed of the engine and the correspondence.

[0075] As another optional solution, the target pressure of the intake manifold is determined based on the actual engine speed and the actual fuel injection amount. Optionally, a correspondence between the engine speed and the fuel injection amount and the target pressure of the intake manifold is pre-established, and the target pressure of the intake manifold is determined based on the actual engine speed and the actual fuel injection amount and the correspondence.

[0076] The control device performs PID control based on the actual pressure of the intake manifold and the target pressure. If the actual pressure of the intake manifold is greater than the target pressure, the control device increases the driving duty ratio of the electric pressure regulating valve. After the control device increases the driving duty ratio of the electric pressure regulating valve, if the actual pressure of the intake manifold is still greater than the target pressure, the control device increases the driving duty ratio of the electric pressure regulating valve again until the actual pressure of the intake manifold drops to the target pressure.

[0077] The applicant has found that the sticking of the electric pressure regulating valve usually occurs in the following situation: the valve core of the electric pressure regulating valve is stuck at a certain position by a foreign object, causing the valve core to be unable to continue moving in the direction of increasing the opening.

[0078] It is understandable that, in the case where the electric pressure regulating valve does not have a stuck fault, the control device performs an operation to increase the driving duty cycle of the electric pressure regulating valve, and the opening of the electric pressure regulating valve increases accordingly, causing the actual pressure of the intake manifold to decrease. In the case where the electric pressure regulating valve has a stuck fault, the control device performs an operation to increase the driving duty cycle of the electric pressure regulating valve, but because the valve core is stuck by a foreign object, the opening of the electric pressure regulating valve cannot continue to increase, and thus the actual pressure of the intake manifold cannot decrease. Based on this, the control device will perform the operation of increasing the driving duty cycle of the electric pressure regulating valve multiple times, resulting in the following phenomenon: under the same high-load steady-state working condition, the driving duty cycle of the electric pressure regulating valve in the case of a stuck fault will be greater than the driving duty cycle of the electric pressure regulating valve in the case of no stuck fault.

[0079] Based on this finding, in the fault detection state, that is, when the engine is in a high-load steady-state condition, by comparing the driving duty cycle of the electric pressure regulating valve and the upper limit of the driving duty cycle of the electric pressure regulating valve under the current working condition, it is determined whether the electric pressure regulating valve has a stuck fault. Among them, the upper limit of the driving duty cycle of the electric pressure regulating valve under any working condition is determined based on the operating parameters of the electric pressure regulating valve in a normal state. It can be understood that the electric pressure regulating valve in a normal state refers to an electric pressure regulating valve that has not failed. In implementation, a new electric pressure regulating valve can be installed in the engine intake system, and the upper limit of the driving duty cycle of the electric pressure regulating valve under various working conditions can be determined based on the operating parameters of the electric pressure regulating valve.

[0080] As an optional solution, determining the upper limit of the driving duty cycle of the electric pressure regulating valve under the current working condition includes:

[0081] Based on the pre-established correspondence between the operating parameters of the engine and the upper limit value of the driving duty ratio, the upper limit value of the driving duty ratio corresponding to the current operating parameters of the engine is obtained.

[0082] In implementation, the following scheme may be used to construct a corresponding relationship between the operating parameters of the engine and the upper limit value of the driving duty cycle:

[0083] Set multiple operating parameter calibration points;

[0084] For each operating parameter calibration point, a plurality of standard engines are respectively controlled to operate at the operating parameter calibration point, the driving duty ratios of the plurality of standard engines at the operating parameter calibration point are obtained, and an upper limit value of the driving duty ratio at the operating parameter calibration point is determined based on the driving duty ratios of the plurality of standard engines at the operating parameter calibration point;

[0085] Based on a plurality of operating parameter calibration points and corresponding upper limits of the driving duty cycle, a corresponding relationship between the operating parameters of the engine and the upper limit of the driving duty cycle is constructed.

[0086] A standard engine is one that has no faults or abnormalities.

[0087] Optionally, the maximum value of the driving duty cycles of multiple standard engines at the operating parameter calibration point is determined as the upper limit value of the driving duty cycle at the operating parameter calibration point.

[0088] Optionally, an interpolation operation is performed based on a plurality of operating parameter calibration points and corresponding upper limits of the driving duty cycle to construct a corresponding relationship between the operating parameters of the engine and the upper limit of the driving duty cycle.

[0089] Optionally, the operating parameter calibration point includes the engine speed value. Optionally, the operating parameter calibration point includes the engine speed value and the fuel injection amount.

[0090] It can be understood that if the operating parameter calibration point only includes the engine speed value, then what is constructed is the corresponding relationship between the engine speed and the upper limit value of the driving duty cycle. Accordingly, based on the actual engine speed and the corresponding relationship, the upper limit value of the driving duty cycle of the electric pressure regulating valve under the current working condition is determined. If the operating parameter calibration point includes the engine speed value and the injection amount, then what is constructed is the corresponding relationship between the engine speed and the injection amount and the upper limit value of the driving duty cycle. Accordingly, based on the actual engine speed value and the actual injection amount, and the corresponding relationship, the upper limit value of the driving duty cycle of the electric pressure regulating valve under the current working condition is determined.

[0091] As another optional solution, determining the upper limit value of the driving duty cycle of the electric pressure regulating valve under the current working condition includes:

[0092] Obtaining current operating parameters, which include environmental parameters and engine operating parameters;

[0093] Based on the pre-established correspondence between the operating condition parameter and the upper limit value of the driving duty cycle, the upper limit value of the driving duty cycle corresponding to the current operating condition parameter is obtained.

[0094] Optionally, the environmental parameter includes at least one of an environmental pressure and an environmental temperature. Optionally, the operating parameter of the engine includes a rotation speed of the engine and may also include a fuel injection amount of the engine.

[0095] In implementation, the following scheme can be used to construct the corresponding relationship between the operating condition parameters and the upper limit value of the driving duty cycle:

[0096] Set multiple operating parameter calibration points;

[0097] Under a standard environment, for each operating parameter calibration point, a plurality of standard engines are respectively controlled to operate at the operating parameter calibration point, the driving duty ratios of the plurality of standard engines at the operating parameter calibration point are obtained, and an upper limit value of the driving duty ratio at the operating parameter calibration point is determined based on the driving duty ratios of the plurality of standard engines at the operating parameter calibration point;

[0098] Based on a plurality of operating parameter calibration points and corresponding upper limits of the driving duty cycle, a corresponding relationship between the operating parameters of the engine under a standard environment and the upper limit of the driving duty cycle is established;

[0099] Based on the environmental correction coefficient, the correspondence between the operating parameters of the engine under the standard environment and the upper limit value of the drive duty cycle is corrected to obtain the correspondence between the operating parameters of the engine under different environments and the upper limit value of the drive duty cycle, that is, the correspondence between the operating parameters and the upper limit value of the drive duty cycle.

[0100] Wherein, the environmental correction coefficient includes at least one of an environmental pressure correction coefficient and an environmental temperature correction coefficient. That is to say, the corresponding relationship between the operating parameters of the engine under the standard environment and the upper limit value of the driving duty cycle can be corrected only based on the environmental pressure correction coefficient, and accordingly, what is obtained is: the corresponding relationship between the operating parameters of the engine under different environmental pressures and the upper limit value of the driving duty cycle. The corresponding relationship between the operating parameters of the engine under the standard environment and the upper limit value of the driving duty cycle can be corrected only based on the environmental temperature correction coefficient, and accordingly, what is obtained is: the corresponding relationship between the operating parameters of the engine under different ambient temperatures and the upper limit value of the driving duty cycle. The corresponding relationship between the operating parameters of the engine under the standard environment and the upper limit value of the driving duty cycle can be corrected based on the environmental pressure correction coefficient and the environmental temperature correction coefficient, and accordingly, what is obtained is: the corresponding relationship between the operating parameters of the engine and the upper limit value of the driving duty cycle under different combinations of environmental pressures and ambient temperatures.

[0101] S104: If the driving duty cycle of the electric pressure regulating valve is greater than the upper limit value under the current working condition, and the absolute value of the difference between the two is greater than a preset value or the driving duty cycle of the electric pressure regulating valve is 100%, it is determined that the electric pressure regulating valve has a stuck fault.

[0102] Under the same high-load steady-state working condition, the driving duty cycle of the electric pressure regulating valve when a stuck fault occurs will be greater than the driving duty cycle of the electric pressure regulating valve when no stuck fault occurs. Therefore, if the driving duty cycle of the electric pressure regulating valve is greater than the upper limit value under the current working condition, and the absolute value of the difference between the two is greater than the preset value, it is determined that the electric pressure regulating valve has a stuck fault. If the driving duty cycle of the electric pressure regulating valve is greater than the upper limit value under the current working condition, and the driving duty cycle of the electric pressure regulating valve is 100%, it is determined that the electric pressure regulating valve has a stuck fault.

[0103] The stuck fault detection method disclosed in the present application is based on the finding that under the same high-load steady-state operating condition, the driving duty cycle of the electric pressure regulating valve when a stuck fault occurs will be greater than the driving duty cycle of the electric pressure regulating valve when no stuck fault occurs. When the engine is in a high-load steady-state operating condition, the method enters a fault detection state. In the fault detection state, the driving duty cycle of the electric pressure regulating valve is obtained, and the upper limit value of the driving duty cycle of the electric pressure regulating valve under the current operating condition is obtained. If the driving duty cycle of the electric pressure regulating valve is greater than the upper limit value under the current operating condition, and the absolute value of the difference between the two is greater than a preset value or the driving duty cycle of the electric pressure regulating valve is 100%, it is determined that the electric pressure regulating valve has a stuck fault. The method can detect whether the electric pressure regulating valve has a stuck fault without disassembling the engine.

[0104] See also Figure 2 , Figure 2 This is a flow chart of a method for handling a stuck fault disclosed in the present application. The method for handling a stuck fault includes:

[0105] S201: Obtaining engine operating parameters.

[0106] S202: When the operating parameters of the engine indicate that the engine is in a high-load steady-state condition, entering a fault detection state.

[0107] S203: In the fault detection state, obtaining the driving duty cycle of the electric pressure regulating valve, and determining the upper limit value of the driving duty cycle of the electric pressure regulating valve under the current working condition.

[0108] Among them, the control device adjusts the driving duty cycle of the electric pressure regulating valve in the following manner: the driving duty cycle of the electric pressure regulating valve is adjusted based on the actual pressure of the intake manifold of the engine and the target pressure, and when the actual pressure of the intake manifold is greater than the target pressure, the driving duty cycle of the electric pressure regulating valve is gradually increased.

[0109] S204: If the driving duty cycle of the electric pressure regulating valve is greater than the upper limit value under the current working condition, and the absolute value of the difference between the two is greater than the preset value or the driving duty cycle of the electric pressure regulating valve is 100%, it is determined that the electric pressure regulating valve has a stuck fault.

[0110] S205: After the engine is powered off, within a first period of time, the driving duty ratio of the electric pressure regulating valve is controlled to change back and forth between a first value and a second value, so that the valve core of the electric pressure regulating valve reciprocates in the valve seat.

[0111] After the engine is powered off, the valve core of the electric pressure regulating valve is controlled to reciprocate in the valve seat. The reciprocating motion of the valve core helps to shake off foreign matter that is stuck in the valve core.

[0112] When the electric pressure regulating valve has not stuck, the driving duty cycle of the electric pressure regulating valve determines the opening of the electric pressure regulating valve. Specifically, the driving duty cycle of the electric pressure regulating valve is positively correlated with its opening. That is, the greater the driving duty cycle of the electric pressure regulating valve, the greater the opening of the electric pressure regulating valve.

[0113] It can be understood that the greater the stroke of the valve core reciprocating motion, the greater the possibility that the foreign matter stuck in the valve core will be shaken off, and the faster the speed of the valve core reciprocating motion, the greater the possibility that the foreign matter stuck in the valve core will be shaken off. Based on this, the greater the difference between the first value and the second value, the greater the actual stroke of the valve core reciprocating motion, and accordingly, the greater the possibility that the foreign matter stuck in the valve core will be shaken off. In the first time period, the more times the driving duty cycle changes back and forth between the first value and the second value, the greater the possibility that the foreign matter stuck in the valve core will be shaken off.

[0114] Optionally, the lower limit of the value range of the first numerical value is 0 (including the endpoint value), the upper limit of the value range of the second numerical value is 100% (including the endpoint value), and the upper limit of the value range of the first numerical value is less than the lower limit of the value range of the second numerical value.

[0115] Optionally, the first numerical value ranges from 0 to 30% (including the endpoint value), and the second numerical value ranges from 70% to 100% (including the endpoint value).

[0116] Optionally, the first numerical value ranges from 0 to 20% (including the endpoint value), and the second numerical value ranges from 80% to 100% (including the endpoint value).

[0117] Optionally, the first numerical value ranges from 0 to 10% (including the endpoint value), and the second numerical value ranges from 90% to 100% (including the endpoint value).

[0118] Optionally, the first value is 0 and the second value is 100%.

[0119] For the specific implementation of steps S201 to S204, please refer to the description of steps S101 to S104 in the above text.

[0120] The method for handling a stuck fault disclosed in the present application is based on the finding that under the same high-load steady-state working condition, the driving duty ratio of the electric pressure regulating valve in the case of a stuck fault will be greater than the driving duty ratio of the electric pressure regulating valve in the case of a non-stuck fault. When the engine is in a high-load steady-state working condition, the method enters a fault detection state. In the fault detection state, the driving duty ratio of the electric pressure regulating valve is obtained, and the upper limit value of the driving duty ratio of the electric pressure regulating valve in the current working condition is obtained. If the driving duty ratio of the electric pressure regulating valve is greater than the upper limit value in the current working condition, and the difference between the two is If the absolute value of the value is greater than the preset value or the driving duty cycle of the electric pressure regulating valve is 100%, it is determined that the electric pressure regulating valve has a stuck fault, and whether the electric pressure regulating valve has a stuck fault can be detected without disassembling the engine; when it is determined that the electric pressure regulating valve has a stuck fault, after the engine is powered off, within a first time period, the driving duty cycle of the electric pressure regulating valve is controlled to reciprocate between a first value and a second value, so that the valve core of the electric pressure regulating valve reciprocates in the valve seat, and the foreign matter stuck in the valve core may be shaken off by the reciprocating motion of the valve core.

[0121] In another embodiment of the method for handling a stuck fault disclosed in the present application, the following steps are further provided:

[0122] After the first period, the engine is running, and the stuck fault detection is performed again to determine whether the stuck fault of the electric pressure regulating valve is eliminated;

[0123] When it is determined that the sticking fault of the electric pressure regulating valve has not been eliminated, after the engine is powered off, within a second time period, the driving duty cycle of the electric pressure regulating valve is controlled to vary back and forth between a first value and a second value, so that the valve core of the electric pressure regulating valve reciprocates in the valve seat, wherein the current value applied to the electric pressure regulating valve within the second time period is greater than the current value applied to the electric pressure regulating valve within the first time period.

[0124] The stuck fault detection is steps S201 to S204.

[0125] In the first period, the driving duty ratio of the electric pressure regulating valve is controlled to change back and forth between the first value and the second value, so that the valve core of the electric pressure regulating valve reciprocates in the valve seat (which can be regarded as the first solution to eliminate the stuck fault). The reciprocating motion of the valve core may shake off the foreign matter, or may not shake off the foreign matter. After the first period, when the engine is running, the stuck fault detection is performed again to determine whether the foreign matter stuck in the valve core is shaken off, that is, to determine whether the stuck fault of the electric pressure regulating valve is eliminated. If the stuck fault of the electric pressure regulating valve is not eliminated, the second solution to eliminate the stuck fault is adopted. Compared with the first solution to eliminate the stuck fault, the second solution to eliminate the stuck fault has the following difference: the current applied to the electric pressure regulating valve is larger. By increasing the current applied to the electric pressure regulating valve, the lifting force of the valve core is larger, which can further increase the possibility of the foreign matter being shaken off.

[0126] In the above-mentioned embodiment of the present application, when it is determined that the electric pressure regulating valve has a stuck fault, the first solution for eliminating the stuck fault is executed after the engine is powered off. After the engine is started, it is determined whether the stuck fault of the electric pressure regulating valve is eliminated. If not, the second solution for eliminating the stuck fault is executed after the engine is powered off, that is, the current value applied to the voltage pressure regulating valve is increased, so that the lifting force of the valve core is greater, which can further increase the possibility of foreign matter being shaken off.

[0127] In another embodiment of the method for handling a stuck fault disclosed in the present application, the following steps are further provided:

[0128] After the second period, the engine is running, and the stuck fault detection is performed again to determine whether the stuck fault of the electric pressure regulating valve is eliminated;

[0129] When it is determined that the sticking fault of the electric pressure regulating valve has not been eliminated, an alarm message is output.

[0130] In the above-mentioned embodiment of the present application, when it is determined that the electric pressure regulating valve has a stuck fault, after the engine is powered off, the first solution for eliminating the stuck fault is executed. After the engine is started, it is determined whether the stuck fault of the electric pressure regulating valve has been eliminated. If it has not been eliminated, after the engine is powered off, the second solution for eliminating the stuck fault is executed, that is, the current value applied to the voltage regulating valve is increased to make the lifting force of the valve core greater, which can further increase the possibility of foreign matter being shaken off. After the engine is started, it is determined whether the stuck fault of the electric pressure regulating valve has been eliminated. If the stuck fault has not been eliminated, an alarm message is output so that the user can handle the stuck fault of the electric pressure regulating valve in a timely manner.

[0131] In this solution, the duration of the first period and the duration of the second period can be set by oneself, the number of times the duty ratio of the electric pressure regulating valve changes back and forth between the first value and the second value in the first period can be set by oneself, and the number of times the duty ratio of the electric pressure regulating valve changes back and forth between the first value and the second value in the second period can be set by oneself. If a large current is applied to the electric pressure regulating valve for a long time, the electric pressure regulating valve may be damaged. Therefore, the second period is set to a shorter duration to protect the electric pressure regulating valve from being damaged.

[0132] The present application discloses a stuck fault detection method, and accordingly, the present application also discloses a stuck fault detection device to implement the stuck fault detection method.

[0133] See also Figure 3 , Figure 3 This is a schematic diagram of the structure of a stuck fault detection device disclosed in the present application. The stuck fault detection device includes:

[0134] An operating parameter acquisition module 10 is used to obtain operating parameters of the engine;

[0135] The state decision module 20 is used to enter the fault detection state when the operating parameters of the engine indicate that the engine is in a high-load steady-state condition;

[0136] The upper limit value determination module 30 is used to obtain the driving duty ratio of the electric pressure regulating valve in the fault detection state, and determine the upper limit value of the driving duty ratio of the electric pressure regulating valve in the current working condition, wherein the driving duty ratio of the electric pressure regulating valve is adjusted based on the actual pressure of the intake manifold of the engine and the target pressure, and when the actual pressure of the intake manifold is greater than the target pressure, the driving duty ratio of the electric pressure regulating valve is gradually increased;

[0137] The stuck fault determination module 40 is used to determine that the electric pressure regulating valve has a stuck fault when the driving duty cycle of the electric pressure regulating valve is greater than the upper limit value under the current working condition and the absolute value of the difference between the two is greater than a preset value or the driving duty cycle of the electric pressure regulating valve is 100%.

[0138] The stuck fault detection device disclosed in the present application is based on the finding that under the same high-load steady-state operating condition, the driving duty cycle of the electric pressure regulating valve when a stuck fault occurs will be greater than the driving duty cycle of the electric pressure regulating valve when no stuck fault occurs. When the engine is in a high-load steady-state operating condition, the device enters a fault detection state. In the fault detection state, the driving duty cycle of the electric pressure regulating valve is obtained, and the upper limit value of the driving duty cycle of the electric pressure regulating valve under the current operating condition is obtained. If the driving duty cycle of the electric pressure regulating valve is greater than the upper limit value under the current operating condition, and the absolute value of the difference between the two is greater than a preset value or the driving duty cycle of the electric pressure regulating valve is 100%, it is determined that the electric pressure regulating valve has a stuck fault. The device can detect whether the electric pressure regulating valve has a stuck fault without disassembling the engine.

[0139] In a possible implementation, the operating parameter acquisition module 10 obtains the actual speed of the engine. Accordingly, the state decision module 20 determines that the engine is in a high-load steady-state condition when the operating parameters of the engine meet the following conditions: the actual speed of the engine is greater than the first speed threshold, and the actual speed change rate of the engine is less than the first change rate threshold.

[0140] In a possible implementation, the operating parameter acquisition module 10 obtains the actual speed and actual fuel injection amount of the engine. Accordingly, the state decision module 20 determines that the engine is in a high-load steady-state condition when the operating parameters of the engine meet the following conditions: the actual speed of the engine is greater than the first speed threshold, the actual fuel injection amount of the engine is greater than the first fuel injection amount threshold, the actual speed change rate of the engine is less than the first change rate threshold, and the actual fuel injection amount change rate of the engine is less than the second change rate threshold.

[0141] In one possible implementation, the upper limit value determination module 30 determines the upper limit value of the driving duty cycle of the electric pressure regulating valve under the current operating conditions, including: based on a pre-constructed correspondence between the engine operating parameters and the upper limit value of the driving duty cycle, obtaining the upper limit value of the driving duty cycle corresponding to the current operating parameters of the engine.

[0142] In one possible implementation, the upper limit value determination module 30 determines the upper limit value of the driving duty cycle of the electric pressure regulating valve under the current operating conditions, including: obtaining the current operating condition parameters, the operating condition parameters include environmental parameters and engine operating parameters; based on the pre-constructed correspondence between the operating condition parameters and the upper limit value of the driving duty cycle, obtaining the upper limit value of the driving duty cycle corresponding to the current operating condition parameters.

[0143] Optionally, the environmental parameter includes at least one of an environmental pressure and an environmental temperature. Optionally, the operating parameter of the engine includes a rotation speed of the engine and may also include a fuel injection amount of the engine.

[0144] The present application discloses a method for handling a stuck fault, and accordingly, the present application also discloses a device for handling a stuck fault to implement the method for handling a stuck fault.

[0145] See also Figure 4 , Figure 4 This is a schematic diagram of the structure of a stuck fault processing device disclosed in the present application. The stuck fault processing device includes:

[0146] An operating parameter acquisition module 10 is used to obtain operating parameters of the engine;

[0147] The state decision module 20 is used to enter the fault detection state when the operating parameters of the engine indicate that the engine is in a high-load steady-state condition;

[0148] The upper limit value determination module 30 is used to obtain the driving duty ratio of the electric pressure regulating valve in the fault detection state, and determine the upper limit value of the driving duty ratio of the electric pressure regulating valve in the current working condition, wherein the driving duty ratio of the electric pressure regulating valve is adjusted based on the actual pressure of the intake manifold of the engine and the target pressure, and when the actual pressure of the intake manifold is greater than the target pressure, the driving duty ratio of the electric pressure regulating valve is gradually increased;

[0149] A stuck fault determination module 40 is used to determine that the electric pressure regulating valve has a stuck fault when the driving duty cycle of the electric pressure regulating valve is greater than the upper limit value under the current working condition and the absolute value of the difference between the two is greater than a preset value or the driving duty cycle of the electric pressure regulating valve is 100%;

[0150] The first fault processing module 50 is used to control the driving duty ratio of the electric pressure regulating valve to change back and forth between a first value and a second value within a first time period after the engine is powered off, so that the valve core of the electric pressure regulating valve reciprocates in the valve seat.

[0151] The stuck fault handling device disclosed in the present application can detect whether an electric pressure regulating valve has a stuck fault without disassembling the engine; in addition, when it is determined that the electric pressure regulating valve has a stuck fault, after the engine is powered off, within a first time period, the driving duty ratio of the electric pressure regulating valve is controlled to vary back and forth between a first value and a second value, so that the valve core of the electric pressure regulating valve reciprocates in the valve seat, and the foreign matter stuck in the valve core may be shaken off by the reciprocating motion of the valve core.

[0152] Optional, in Figure 4 On the basis of the stuck fault processing device shown, a second fault processing module is further provided.

[0153] The second fault handling module is used to: after the first time period, when the engine is running, trigger the operating parameter acquisition module 10, the state decision module 20, the upper limit value determination module 30 and the stuck fault determination module 40 to perform the stuck fault detection again to determine whether the stuck fault of the electric pressure regulating valve is eliminated; when it is determined that the stuck fault of the electric pressure regulating valve has not been eliminated, after the engine is powered off, within the second time period, control the driving duty cycle of the electric pressure regulating valve to reciprocate between the first value and the second value, so that the valve core of the electric pressure regulating valve reciprocates in the valve seat, wherein the current value applied to the electric pressure regulating valve within the second time period is greater than the current value applied to the electric pressure regulating valve within the first time period.

[0154] Optionally, based on the above-mentioned stuck fault processing device, a fault alarm module is further provided.

[0155] The fault alarm module is used to: after the second period, when the engine is running, trigger the operating parameter acquisition module 10, the state decision module 20, the upper limit value determination module 30 and the stuck fault determination module 40 to perform the stuck fault detection again to determine whether the stuck fault of the electric pressure regulating valve is eliminated; if it is determined that the stuck fault of the electric pressure regulating valve has not been eliminated, output an alarm message.

[0156] The present application also provides an electronic device.

[0157] See also Figure 5 , Figure 5 The hardware structure of the electronic device is shown. The electronic device includes: a processor 501 , a memory 502 , a communication interface 503 , and a communication bus 504 .

[0158] In the embodiment of the present application, the number of the processor 501, the memory 502, the communication interface 503, and the communication bus 504 is at least one, and the processor 501, the memory 502, and the communication interface 503 communicate with each other through the communication bus 504. The communication bus 504 can be an ISA (Industry Standard Architecture) bus, a PCI (Peripheral Component Interconnect) bus, or an EISA (Extended Industry Standard Architecture) bus, etc. The bus can be divided into an address bus, a data bus, a control bus, etc.

[0159] It should be noted that those skilled in the art can understand that Figure 5 The structure of the electronic device shown in the figure does not constitute a limitation on the electronic device, and the electronic device may include Figure 5More or fewer components may be shown, or certain components may be combined, or the components may be arranged differently.

[0160] Combine the following Figure 5 Provide a detailed introduction to the various components of electronic equipment.

[0161] The processor 501 is the control center of the electronic device. It uses various interfaces and lines to connect various parts of the entire electronic device. It executes various functions of the electronic device and processes data by running or executing software programs and / or modules stored in the memory 502 and calling data stored in the memory 502, thereby monitoring the electronic device as a whole.

[0162] The processor 501 may be a central processing unit (CPU), or an application specific integrated circuit (ASIC), or one or more integrated circuits configured to implement the embodiments of the present invention, etc.;

[0163] The memory 502 may include a memory, such as a high-speed random-access memory (RAM) and a read-only memory (ROM), and may also include a large-capacity storage device, such as at least one disk storage.

[0164] Among them, the memory 502 stores a program, and the processor 501 can call the program stored in the memory, and the program is used to implement any one of the stuck fault detection methods provided in the embodiments of the present application, or implement any one of the stuck fault processing methods provided in the embodiments of the present application.

[0165] An embodiment of the present application also provides a computer storage medium, which carries one or more computer programs. When the one or more computer programs are executed by an electronic device, the electronic device can implement any one of the stuck fault detection methods provided in the embodiments of the present application, or implement any one of the stuck fault processing methods provided in the embodiments of the present application.

[0166] An embodiment of the present application also provides a computer program product, including computer-readable instructions. When the computer-readable instructions are executed on an electronic device, the electronic device implements any one of the stuck fault detection methods provided in the embodiments of the present application, or implements any one of the stuck fault processing methods provided in the embodiments of the present application.

[0167] It should be noted that the technical features recorded in the various embodiments in the specification can be replaced or combined with each other, and each embodiment focuses on the differences from other embodiments, and the same or similar parts between the various embodiments can be referred to each other. The steps in the methods of the various embodiments of the present application can be adjusted in sequence, merged and deleted according to actual needs. The modules and sub-modules in the devices and equipment of the various embodiments of the present application can be merged, divided and deleted according to actual needs.

[0168] In the several embodiments provided in the present application, it should be understood that the disclosed devices, apparatuses and methods can be implemented in other ways. For example, the device embodiments described above are merely schematic, for example, the division of modules or sub-modules is only a logical function division, and there may be other division methods in actual implementation, for example, multiple sub-modules or modules can be combined or integrated into another module, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be an indirect coupling or communication connection through some interfaces, devices or modules, which can be electrical, mechanical or other forms.

[0169] The modules or submodules described as separate components may or may not be physically separated, and the components of the modules or submodules may or may not be physical modules or submodules, that is, they may be located in one place, or they may be distributed on multiple network modules or submodules. Some or all of the modules or submodules may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0170] In addition, each functional module or submodule in each embodiment of the present application may be integrated into one processing module, or each module or submodule may exist physically separately, or two or more modules or submodules may be integrated into one module. The above-mentioned integrated modules or submodules may be implemented in the form of hardware or in the form of software functional modules or submodules.

[0171] It should also be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0172] In this specification, each embodiment is described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same and similar parts between the embodiments can be referred to each other. The technical features in each embodiment can be arranged and combined to form a new embodiment. For the stuck fault detection device, stuck fault processing device, electronic device, computer storage medium and computer program product disclosed in the embodiment, since they correspond to the stuck fault detection method and stuck fault processing method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the method part description.

[0173] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A method for detecting a stuck fault, wherein an air inlet of an electric pressure regulating valve is connected to an air source, and an air outlet of the electric pressure regulating valve is connected to a control port of an air bleed valve of a turbocharger, characterized in that: The stuck fault detection method comprises: Obtaining engine operating parameters; Entering a fault detection state when the operating parameters of the engine indicate that the engine is in a high-load steady-state operating condition; In the fault detection state, the driving duty ratio of the electric pressure regulating valve is obtained, and the upper limit value of the driving duty ratio of the electric pressure regulating valve in the current working condition is determined, wherein the driving duty ratio of the electric pressure regulating valve is adjusted based on the actual pressure of the intake manifold of the engine and the target pressure, and when the actual pressure of the intake manifold is greater than the target pressure, the driving duty ratio of the electric pressure regulating valve is gradually increased; If the driving duty cycle of the electric pressure regulating valve is greater than the upper limit value under the current working condition, and the absolute value of the difference between the two is greater than a preset value or the driving duty cycle of the electric pressure regulating valve is 100%, it is determined that the electric pressure regulating valve has a stuck fault.

2. The method for detecting a stuck fault according to claim 1, characterized in that: When the operating parameters of the engine meet the following conditions, it is determined that the engine is in a high-load steady-state operating condition: The actual speed of the engine is greater than the first speed threshold, the actual fuel injection amount of the engine is greater than the first fuel injection amount threshold, the actual speed change rate of the engine is less than the first change rate threshold, and the actual fuel injection amount change rate of the engine is less than the second change rate threshold.

3. The method for detecting a stuck fault according to claim 1, characterized in that: Determining the upper limit value of the driving duty cycle of the electric pressure regulating valve under the current working condition includes: Obtaining current operating parameters, wherein the operating parameters include environmental parameters and operating parameters of the engine; Based on the pre-established correspondence between the operating condition parameter and the upper limit value of the driving duty cycle, the upper limit value of the driving duty cycle corresponding to the current operating condition parameter is obtained.

4. A method for handling a stuck fault, wherein the air inlet of the electric pressure regulating valve is connected to the air source, and the air outlet of the electric pressure regulating valve is connected to the control port of the exhaust valve of the turbocharger, characterized in that: The stuck fault processing method comprises: Obtaining engine operating parameters; Entering a fault detection state when the operating parameters of the engine indicate that the engine is in a high-load steady-state operating condition; In the fault detection state, the driving duty ratio of the electric pressure regulating valve is obtained, and the upper limit value of the driving duty ratio of the electric pressure regulating valve in the current working condition is determined, wherein the driving duty ratio of the electric pressure regulating valve is adjusted based on the actual pressure of the intake manifold of the engine and the target pressure, and when the actual pressure of the intake manifold is greater than the target pressure, the driving duty ratio of the electric pressure regulating valve is gradually increased; If the driving duty cycle of the electric pressure regulating valve is greater than the upper limit value under the current working condition, and the absolute value of the difference between the two is greater than a preset value or the driving duty cycle of the electric pressure regulating valve is 100%, it is determined that the electric pressure regulating valve has a stuck fault; After the engine is powered off, within a first period of time, the driving duty ratio of the electric pressure regulating valve is controlled to change back and forth between a first value and a second value, so that the valve core of the electric pressure regulating valve reciprocates in the valve seat.

5. The method for handling a stuck fault according to claim 4, characterized in that: Also includes: After the first period, the engine is in a running state, performing a stuck fault detection again to determine whether the stuck fault of the electric pressure regulating valve is eliminated; When it is determined that the sticking fault of the electric pressure regulating valve has not been eliminated, after the engine is powered off, within a second time period, the driving duty cycle of the electric pressure regulating valve is controlled to vary back and forth between the first value and the second value, so that the valve core of the electric pressure regulating valve reciprocates in the valve seat, wherein the current value applied to the electric pressure regulating valve within the second time period is greater than the current value applied to the electric pressure regulating valve within the first time period.

6. The method for handling a stuck fault according to claim 5, characterized in that: Also includes: After the second period, the engine is running, performing a stuck fault detection again to determine whether the stuck fault of the electric pressure regulating valve is eliminated; When it is determined that the sticking fault of the electric pressure regulating valve has not been eliminated, an alarm message is output.

7. A stuck fault detection device, wherein the air inlet of the electric pressure regulating valve is connected to the air source, and the air outlet of the electric pressure regulating valve is connected to the control port of the exhaust valve of the turbocharger, characterized in that: The stuck fault detection device comprises: An operating parameter acquisition module is used to obtain the operating parameters of the engine; A state decision module, configured to enter a fault detection state when the operating parameters of the engine indicate that the engine is in a high-load steady-state operating condition; an upper limit value determination module, configured to obtain the driving duty ratio of the electric pressure regulating valve in the fault detection state, and determine the upper limit value of the driving duty ratio of the electric pressure regulating valve in the current working condition, wherein the driving duty ratio of the electric pressure regulating valve is adjusted based on the actual pressure of the intake manifold of the engine and the target pressure, and when the actual pressure of the intake manifold is greater than the target pressure, the driving duty ratio of the electric pressure regulating valve is gradually increased; A stuck fault determination module is used to determine that the electric pressure regulating valve has a stuck fault when the driving duty cycle of the electric pressure regulating valve is greater than the upper limit value under the current working conditions and the absolute value of the difference between the two is greater than a preset value or the driving duty cycle of the electric pressure regulating valve is 100%.

8. A device for handling a stuck fault, wherein the air inlet of the electric pressure regulating valve is connected to the air source, and the air outlet of the electric pressure regulating valve is connected to the control port of the exhaust valve of the turbocharger, characterized in that: The stuck fault processing device comprises: An operating parameter acquisition module is used to obtain the operating parameters of the engine; A state decision module, configured to enter a fault detection state when the operating parameters of the engine indicate that the engine is in a high-load steady-state operating condition; an upper limit value determination module, configured to obtain the driving duty ratio of the electric pressure regulating valve in the fault detection state, and determine the upper limit value of the driving duty ratio of the electric pressure regulating valve in the current working condition, wherein the driving duty ratio of the electric pressure regulating valve is adjusted based on the actual pressure of the intake manifold of the engine and the target pressure, and when the actual pressure of the intake manifold is greater than the target pressure, the driving duty ratio of the electric pressure regulating valve is gradually increased; a stuck fault determination module, configured to determine that the electric pressure regulating valve has a stuck fault when the driving duty cycle of the electric pressure regulating valve is greater than the upper limit value under the current working condition and the absolute value of the difference between the two is greater than a preset value or the driving duty cycle of the electric pressure regulating valve is 100%; The first fault processing module is used to control the driving duty ratio of the electric pressure regulating valve to change back and forth between a first value and a second value within a first time period after the engine is powered off, so that the valve core of the electric pressure regulating valve reciprocates in the valve seat.

9. An electronic device, characterized in that: The method comprises at least one processor and a memory connected to the processor, wherein: The memory is used to store computer programs; The processor is used to execute the computer program so that the electronic device can implement the stuck fault detection method as described in any one of claims 1 to 3, or the stuck fault processing method as described in any one of claims 4 to 6.

10. A computer storage medium, characterized in that: The computer storage medium carries one or more computer programs, which, when executed by an electronic device, enable the electronic device to implement the stuck fault detection method as described in any one of claims 1 to 3, or the stuck fault processing method as described in any one of claims 4 to 6.

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