A clutch fault detection method and device, electronic equipment and storage medium

Abstract

Embodiments of the present application disclose a clutch fault detection method and device, electronic equipment and storage medium. The method comprises: in the case where it is determined that the current vehicle state meets the clutch fault starting detection condition, slowly closing the backflow valve opening; in the process of slowly closing the backflow valve opening, acquiring the supercharger associated diagnosis pressure; wherein the supercharger associated diagnosis pressure comprises the supercharger rear pressure and the throttle valve rear pressure; in the case where it is determined that the supercharger associated diagnosis pressure meets the clutch disengagement fault detection condition, determining that the clutch of the current vehicle has a disengagement failure. The technical scheme of the embodiments of the present application can improve the accuracy of clutch fault detection, and thus improve the safety of the vehicle and the convenience of maintenance.

Description

Technical Field

[0001] Embodiments of the present invention relate to the technical field of vehicle fault detection, and in particular to a clutch fault detection method, device, electronic device, and storage medium. Background Art

[0002] With the development of the vehicle industry, more and more people are paying attention to the safety, reliability and power of vehicles. Therefore, regular testing of vehicle performance and timely and accurate diagnosis of vehicle faults have become an important part of vehicle fault detection technology.

[0003] Existing vehicle boost system detection technology is mainly aimed at exhaust gas turbocharging systems. Generally, the difference between the current duty cycle of the exhaust gas bypass valve control signal and the theoretical duty cycle is determined to determine whether there is a problem of insufficient boost or excessive boost pressure, or the turbocharger is judged to be faulty by continuously monitoring whether the overshoot of the exhaust gas turbocharger's boost pressure relative to the target pressure is greater than a preset diagnostic threshold. For mechanical supercharging systems, there are currently fault detection methods for related components such as the mechanical supercharger bypass valve and the mechanical supercharger variable speed drive.

[0004] In the process of realizing the present invention, the inventors discovered that the prior art had the following defects: the supercharger fault detection method adopted by the prior art generally obtains the fault monitoring result by comparing the actual measured value with the theoretical value, and there is no relevant detection technology for mechanical supercharger clutch failure. It ignores the problems of increased vehicle fuel consumption and reduced vehicle safety caused by excessive supercharger boost when the clutch fails, thereby reducing the safety factor during vehicle driving. Summary of the Invention

[0005] Embodiments of the present invention provide a clutch fault detection method, device, electronic device, and storage medium, which can improve the accuracy of clutch fault detection, thereby improving the safety of the entire vehicle and the convenience of maintenance.

[0006] In a first aspect, an embodiment of the present invention provides a clutch fault detection method, comprising:

[0007] When it is determined that the current vehicle state meets the clutch fault start detection conditions, the opening of the return valve is controlled to slowly decrease;

[0008] In the process of controlling the return valve opening to slowly decrease, obtaining the supercharger-related diagnostic pressure; wherein the supercharger-related diagnostic pressure includes the supercharger after-pressure and the throttle after-pressure;

[0009] When it is determined that the supercharger-associated diagnostic pressure satisfies the clutch disengagement fault detection condition, it is determined that the clutch of the current vehicle has an undisengagement fault.

[0010] In a second aspect, an embodiment of the present invention further provides a clutch fault detection device, comprising:

[0011] The return valve opening control module is used to control the return valve opening to slowly close when it is determined that the current vehicle state meets the clutch fault start detection conditions;

[0012] A supercharger-related diagnostic pressure acquisition module is used to acquire the supercharger-related diagnostic pressure during the process of slowly closing the return valve opening; wherein the supercharger-related diagnostic pressure includes the supercharger post-pressure and the throttle post-pressure;

[0013] The clutch fault detection module is used to determine that the clutch of the current vehicle has an undisengageable fault when it is determined that the supercharger-associated diagnostic pressure meets the clutch disengagement fault detection condition.

[0014] In a third aspect, an embodiment of the present invention further provides an electronic device, comprising:

[0015] at least one processor; and

[0016] a memory communicatively connected to the at least one processor; wherein,

[0017] The memory stores a computer program executable by the at least one processor. The computer program is executed by the at least one processor so that the at least one processor can perform the clutch fault detection method according to any embodiment of the present invention.

[0018] In a fourth aspect, an embodiment of the present invention further provides a computer-readable storage medium, wherein the computer-readable storage medium stores computer instructions, and the computer instructions are used to enable a processor to implement the clutch fault detection method described in any embodiment of the present invention when executed.

[0019] The embodiment of the present invention controls the return valve opening to slowly decrease upon determining that the current vehicle state satisfies the clutch fault initiation detection condition, and obtains supercharger-associated diagnostic pressures such as the supercharger rear pressure and the throttle rear pressure during the process of controlling the return valve opening to slowly decrease. Upon determining that the supercharger-associated diagnostic pressures satisfy the clutch disengagement fault detection condition, the embodiment of the present invention further determines that the clutch of the current vehicle has an undisengagement fault, thereby solving the problem in the prior art of ignoring the possible impact of clutch faults on vehicle safety, and can improve the accuracy of clutch fault detection, thereby improving the safety of the entire vehicle and the convenience of maintenance.

[0020] It should be understood that the content described in this section is not intended to identify the key or important features of the embodiments of the present invention, nor is it intended to limit the scope of the present invention. Other features of the present invention will become readily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0022] Figure 1 This is a flow chart of a clutch fault detection method provided by the first embodiment of the present invention;

[0023] Figure 2 This is a flow chart of a clutch fault detection method provided by the second embodiment of the present invention;

[0024] Figure 3 This is a schematic structural diagram of a mechanical supercharger drive applicable to the second embodiment of the present invention;

[0025] Figure 4 This is a schematic structural diagram of an air intake system for a mechanically supercharged engine applicable to the second embodiment of the present invention;

[0026] Figure 5 1 is a flow chart of a clutch fault detection method provided in a second embodiment of the present invention;

[0027] Figure 6 This is a schematic structural diagram of a clutch fault detection device provided by a third embodiment of the present invention;

[0028] Figure 7 This is a structural diagram of an electronic device provided in Example 4 of the present invention. DETAILED DESCRIPTION

[0029] In order to enable those skilled in the art to better understand the solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of the present invention.

[0030] It should be noted that the terms "first", "second", etc. in the description and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0031] Example 1

[0032] Figure 1 This is a flow chart of a clutch fault detection method provided by the first embodiment of the present invention. This embodiment is applicable to the case of comprehensive detection of clutch faults based on multi-dimensional influencing factors. The method can be executed by a clutch fault detection device. The clutch fault detection device can be implemented in the form of software and / or hardware and can generally be integrated into an electronic device. The electronic device can be a terminal device with a clutch fault detection function or a server device for simulating and testing vehicle functions. The embodiment of the present invention does not limit the specific device type of the electronic device. Accordingly, if Figure 1 As shown, the method includes:

[0033] S110: When it is determined that the current vehicle state satisfies the clutch fault start detection condition, the opening of the return valve is controlled to slowly decrease.

[0034] The clutch fault start detection condition may be understood as a condition that the clutch-related components in the current vehicle are in a normal working state.

[0035] In the embodiment of the present invention, clutch fault detection may be performed by a clutch fault detection unit. The clutch fault detection unit may be a device or electronic device for implementing a clutch fault detection method.

[0036] Accordingly, before initiating clutch fault detection, the clutch fault detection unit can determine whether the components associated with the clutch (such as the intake manifold pressure sensor, the post-throttle pressure sensor, and the supercharger return valve, etc.) are in normal working condition. If the components associated with the clutch are in normal working condition, the clutch fault detection can be initiated to prevent the failure of other clutch-related components from affecting the clutch fault detection process. During the detection process, the clutch fault detection unit can control the return valve opening to slowly close to continuously perform clutch fault detection. If the components associated with the clutch are not in normal working condition, it may be that one or more components associated with the clutch have failed. In this case, the clutch fault detection cannot be initiated. At this time, the clutch fault detection unit can choose to report the corresponding fault information to the system.

[0037] S120. While controlling the return valve opening to slowly decrease, obtain a supercharger-related diagnostic pressure; wherein the supercharger-related diagnostic pressure may include a supercharger post-pressure and a throttle post-pressure.

[0038] The supercharger-associated diagnostic pressure can be a pressure value associated with the supercharger and used to diagnose the supercharger's operating status. Examples include, but are not limited to, the supercharger inlet and outlet pressures. The post-supercharger pressure can be understood as the supercharger outlet pressure. The post-throttle pressure can be understood as the throttle outlet pressure, i.e., the supercharger inlet pressure.

[0039] It is understood that under normal circumstances, when the clutch fault detection unit controls the return valve opening to slowly decrease, if the clutch is disengaged, the pressure after the supercharger will slowly decrease as the return valve opening decreases. If the clutch is not disengaged, the pressure after the supercharger will slowly increase as the return valve opening decreases. Therefore, the clutch fault detection unit can obtain the supercharger pressure and the throttle pressure, etc., and perform the next step of fault detection based on the obtained supercharger pressure and throttle pressure values.

[0040] S130: When it is determined that the supercharger-associated diagnostic pressure satisfies the clutch disengagement fault detection condition, it is determined that the clutch of the current vehicle has an undisengagement fault.

[0041] The clutch disengagement fault detection condition may be a condition capable of determining that the clutch has a clutch disengagement fault.

[0042] Accordingly, the clutch fault detection unit can compare the acquired supercharger pressure value and the post-throttle pressure value to determine whether the vehicle's clutch is unable to disengage by determining the relative magnitude of the two. Generally, if the clutch is disengaged, the supercharger stops boosting, and the post-throttle pressure value is less than the post-throttle pressure value. If the clutch is not disengaged, the supercharger continues boosting, and the post-throttle pressure value is greater than or equal to the post-throttle pressure value.

[0043] The embodiment of the present invention controls the return valve opening to slowly decrease upon determining that the current vehicle state satisfies the clutch fault initiation detection condition, and obtains supercharger-associated diagnostic pressures such as the supercharger rear pressure and the throttle rear pressure during the process of controlling the return valve opening to slowly decrease. Upon determining that the supercharger-associated diagnostic pressures satisfy the clutch disengagement fault detection condition, the embodiment of the present invention further determines that the clutch of the current vehicle has an undisengagement fault, thereby solving the problem in the prior art of ignoring the possible impact of clutch faults on vehicle safety, and can improve the accuracy of clutch fault detection, thereby improving the safety of the entire vehicle and the convenience of maintenance.

[0044] Example 2

[0045] Figure 2 This is a flow chart of a clutch fault detection method provided by the second embodiment of the present invention. This embodiment further optimizes and expands upon the above embodiment and provides multiple specific optional implementations for determining whether the current vehicle state satisfies the clutch fault start detection condition, obtaining the supercharger-related diagnostic pressure, and determining whether the supercharger-related diagnostic pressure satisfies the clutch disengagement fault detection condition. Figure 2 As shown, the method of this embodiment may include:

[0046] S210: Acquire associated component fault detection data for the current vehicle, and determine the associated component fault status based on the associated component fault detection data. The associated component fault detection data may include at least one of the following: intake manifold pressure sensor fault detection data, post-throttle pressure sensor fault detection data, and supercharger return valve fault detection data.

[0047] The associated component fault detection data may be fault detection data of components associated with clutch fault detection. The associated component fault state may be understood as the associated components involved in clutch fault detection being in a fault state.

[0048] Correspondingly, the clutch fault detection unit can obtain the intake manifold pressure sensor fault detection data, the throttle valve rear pressure sensor fault detection data or the mechanical supercharging backflow valve fault detection data of the current vehicle and other associated device fault detection data before starting the clutch fault detection, so as to determine whether the associated device is in a fault state according to the obtained associated device fault detection data.

[0049] S220, determining whether the associated device fault state is a fault-free state. If yes, performing S230; if no, performing S240.

[0050] S230, determining that the current vehicle state meets the first clutch fault start detection condition, and controlling the backflow valve opening to slowly close.

[0051] The first clutch fault start detection condition can include but is not limited to the conditions that the intake manifold pressure sensor, the throttle valve rear pressure sensor and the mechanical supercharging backflow valve are in a normal working state.

[0052] Correspondingly, the clutch fault detection unit can determine that the current vehicle state meets the conditions that the intake manifold pressure sensor, the throttle valve rear pressure sensor and the mechanical supercharging backflow valve are in a normal working state when it is determined that the associated device fault state of the current vehicle is a fault-free state, and then can control the backflow valve opening to slowly close for the next step of clutch fault detection.

[0053] Optionally, after determining that the current vehicle state meets the first clutch fault start detection condition, the method can further include: obtaining clutch fault diagnosis associated data of the current vehicle; determining a current engine speed state according to the clutch fault diagnosis associated data; and determining that the current vehicle state meets a second clutch fault start detection condition when it is determined that the current engine speed state meets a preset speed change state.

[0054] The clutch fault diagnosis associated data can be relevant data for diagnosing clutch faults, which can include but is not limited to data for controlling the clutch to disengage and data for controlling the clutch not to disengage. The current speed state can be understood as the current running state of the engine, which can include but is not limited to the engine speed and the engine speed change gradient. The preset speed change state can be the preset speed value range and speed change gradient of the engine in a normal working state. The second clutch fault start detection condition can be understood as the condition that the engine is in a normal working state.

[0055] Correspondingly, after determining that the devices associated with clutch detection in the current vehicle are in normal working condition, the clutch fault detection unit can obtain the clutch fault diagnosis associated data of the current vehicle, and thus determine the current speed state of the engine based on the clutch fault diagnosis associated data. When it is determined that the current speed state of the engine meets the preset speed change state, it can be determined that the current vehicle state meets the condition that the engine is in normal working condition.

[0056] Optionally, determining that the current speed state of the engine satisfies a preset speed change state may include: determining that the current speed state of the engine satisfies a first preset speed change state when it is determined that the current speed of the engine is within a preset speed range; and determining that the current speed state of the engine satisfies a second preset speed change state when it is determined that the speed change gradient of the current speed of the engine is less than a preset gradient threshold.

[0057] The preset speed range can be understood as a preset engine speed variation range. The first preset speed variation state can be a speed variation range when the engine is in normal operating conditions. The preset gradient threshold can be understood as a preset critical value of the engine speed variation gradient. The second preset speed variation state can be understood as a variation range of the engine speed variation gradient.

[0058] Accordingly, the clutch fault detection unit can determine whether the current engine speed is within a preset speed range. If the current engine speed is within the preset speed range, it can be determined that the current engine speed state satisfies the first preset speed change state. If the current engine speed is not within the preset speed range, the current engine speed state does not satisfy the first preset speed change state, and the next step of clutch fault detection is suspended. After determining that the current engine speed state satisfies the first preset speed change state, the relationship between the speed change gradient of the current engine speed and the preset gradient threshold can also be determined. If the speed change gradient of the current engine speed is less than the preset gradient threshold, it can be determined that the current engine speed state satisfies the second preset speed change state. If the speed change gradient of the current engine speed is greater than or equal to the preset gradient threshold, the next step of clutch fault detection is suspended.

[0059] S240: Pause clutch fault detection.

[0060] Correspondingly, if it is determined that one or more associated components are in a fault state, the clutch fault detection unit cannot continue to perform clutch fault detection and may report the fault state of the corresponding associated component.

[0061] S250: While controlling the opening of the return valve to slowly decrease, obtain intake manifold pressure and intercooler pressure loss values.

[0062] Accordingly, when the clutch fault detection unit determines that the related components of the current vehicle are in a fault-free state and the engine is in normal working condition, it can obtain the intake manifold pressure and intercooler pressure loss values ​​connected to the supercharger while controlling the return valve opening to slowly close.

[0063] Optionally, obtaining the intake manifold pressure and intercooler pressure loss values ​​may include: determining the intake manifold pressure based on pressure data collected by a manifold pressure sensor; determining the gas flow rate based on flow data collected by an air flow meter; and querying preset pressure loss calibration mapping relationship data based on the gas flow rate and the current speed of the engine to obtain the intercooler pressure loss value.

[0064] The preset pressure loss calibration mapping relationship data may be understood as mapping relationship data between the gas flow rate, the engine speed, and the pressure loss value determined in advance based on historical experimental data.

[0065] Correspondingly, the clutch fault detection unit can determine the intake manifold pressure based on the pressure data collected by the manifold pressure sensor, and can determine the gas flow rate based on the flow data collected by the air flow meter, and further query the preset pressure loss calibration mapping relationship data based on the gas flow rate and the current speed of the engine to obtain the intercooler pressure loss value.

[0066] S260: The sum of the intake manifold pressure and the intercooler pressure loss value is used as the post-supercharger pressure.

[0067] Correspondingly, the gas may experience pressure loss after passing through the intercooler. Therefore, when calculating the pressure after the supercharger, the sum of the intake manifold pressure and the intercooler pressure loss value can be used as the pressure after the supercharger.

[0068] S270 : Determine the post-throttle pressure according to pressure data collected by the post-throttle pressure sensor.

[0069] Accordingly, during the clutch fault detection process, the post-throttle pressure may be determined based on the pressure data collected by the post-throttle pressure sensor.

[0070] S280: Determine whether the supercharger-related diagnostic pressure meets the clutch disengagement fault detection condition. If so, execute S290; if not, execute S2100.

[0071] Optionally, determining whether the supercharger-associated diagnostic pressure meets the clutch disengagement fault detection condition may include: calculating the relationship between the supercharger post-pressure and the throttle post-pressure before closing the return valve opening to a preset opening threshold; when it is determined that the supercharger post-pressure is greater than or equal to the throttle post-pressure, calculating the duration of time that the supercharger post-pressure is greater than or equal to the throttle post-pressure; when it is determined that the duration is greater than or equal to the preset duration, determining that the supercharger-associated diagnostic pressure meets the clutch disengagement fault detection condition.

[0072] The preset opening threshold may be a preset critical value of the opening of the return valve.

[0073] Specifically, during clutch fault detection, before closing the return valve opening to a preset opening threshold, the clutch disengagement can be determined by calculating the relationship between the supercharger outlet pressure and the throttle outlet pressure. When the supercharger outlet pressure is greater than or equal to the throttle outlet pressure, it can be indicated that the supercharger is still in operation. If the calculated duration of the supercharger outlet pressure being greater than or equal to the throttle outlet pressure at this time indicates that the supercharger has been in operation for longer than the preset duration, it can be determined that the supercharger is still in operation after the engine-controlled clutch is disengaged, thereby determining that the supercharger-associated diagnostic pressure meets the clutch disengagement fault detection conditions.

[0074] S290: Determine that the clutch of the current vehicle has a clutch failure that prevents it from disengaging.

[0075] Accordingly, after the engine controls the clutch to disengage, if the clutch fails to disengage within a preset duration, that is, the supercharger fails to stop working as required, it can be determined that the clutch of the current vehicle has a failure to disengage.

[0076] S2100: Determine whether the clutch of the current vehicle does not have a clutch disengagement failure.

[0077] Accordingly, after the engine controls the clutch to disengage, if the clutch can execute the disengagement action within the preset duration, causing the supercharger to stop working, it can be determined that the clutch of the current vehicle does not have an undisengagement fault.

[0078] For example, Figure 3 This is a schematic diagram of a mechanical supercharger drive structure applicable to the second embodiment of the present invention. Figure 3 As shown, the mechanical supercharger drive mainly includes a supercharger, a clutch, an engine and an engine crankshaft, wherein the supercharger is driven by the engine crankshaft, and the supercharger and the engine crankshaft are connected via a clutch, and the clutch can be engaged or disengaged according to the engine's boost demand.

[0079] Figure 4This is a schematic structural diagram of an intake system of a mechanical supercharged engine applicable to the second embodiment of the present invention. In order to more clearly illustrate the technical solution provided by the embodiment of the present invention, in a specific example, Figure 4 The intake system of a V-type 8-cylinder supercharged engine is shown as an example. It primarily includes components such as an air filter, air flow meter, electronic throttle, post-throttle pressure sensor, supercharger, return valve, intercooler, manifold pressure sensor, and intake manifold. The intake process involves air passing through the air filter and air flow meter before entering the electronic throttle. After being supercharged by the supercharger, some of the air entering the electronic throttle passes through the intercooler and enters the cylinders, while the remaining air flows back through the return valve to the front of the supercharger. The engine can control the supercharger's boost pressure by controlling the opening of the return valve. Specifically, when the engine's boost pressure demand is high, the return valve opening can be reduced; when the engine's boost pressure demand is low, the return valve opening can be increased. When the supercharged engine's intake system no longer requires boost, boost can be stopped by disengaging the clutch. This deactivates the supercharger, reducing engine mechanical losses and improving fuel economy. When the clutch of the intake system of a mechanically supercharged engine fails and cannot be disengaged, the supercharger will remain in operation. On the one hand, this will cause the engine boost pressure to be too high, affecting power output; on the other hand, it will also cause increased vehicle fuel consumption.

[0080] It should be noted that the embodiments of the present invention do not limit the specific type of engine (arrangement and number of cylinders, etc.), and those skilled in the art can apply the above method to various types of engines according to the requirements of clutch fault detection.

[0081] Figure 5 is a flow chart of a clutch fault detection method provided by the second embodiment of the present invention. In an optional embodiment, as Figure 5 As shown, the clutch fault detection method may include the following three judgment steps:

[0082] Determination step 1: Determine whether a prohibiting condition exists. For example, prohibiting conditions may include an intake manifold pressure sensor failure, a post-throttle pressure sensor failure, or a supercharger return valve failure. If a prohibiting condition exists, clutch fault detection is not performed, and supercharger clutch fault diagnosis ends. If no prohibiting condition exists, clutch fault detection can continue.

[0083] Determine step 2: Determine whether the diagnostic conditions are met. During the clutch fault detection process, after the engine controls the clutch to disengage, if the engine speed is within a preset range (e.g., 550-3000 rpm) and the engine speed change gradient is less than a preset value (e.g., 4000 rpm), it can be determined that the clutch meets the diagnostic conditions. When the above diagnostic conditions are met, clutch fault detection can be performed. The detection process can include three steps: step a: slowly close the return valve opening; step b: determine the post-throttle pressure based on the pressure data collected by the post-throttle pressure sensor as the pressure before the supercharger. Step c: determine the intake manifold pressure based on the pressure data collected by the post-manifold pressure sensor, determine the gas flow rate based on the flow data collected by the air flow meter, and further query the preset pressure loss calibration mapping relationship data based on the gas flow rate and the current engine speed to obtain the intercooler pressure loss value, thereby calculating the sum of the intake manifold pressure and the intercooler pressure loss value as the pressure after the supercharger.

[0084] Judgment step three: Determine the relationship between the supercharger pressure and the throttle pressure. During the process of slowly closing the return valve, if the supercharger pressure is less than the throttle pressure and persists for a preset time (e.g., 1 second), the supercharged engine intake system can be considered to be operating normally and without faults. If the return valve opening is closed to a minimum threshold (e.g., 50% opening), and the supercharger pressure remains greater than the throttle pressure and persists for a preset time (e.g., 1 second), it can be considered that the supercharger is still providing boost, the clutch is not disengaging as required by the engine control, and a clutch failure exists.

[0085] It should be noted that any arrangement and combination of the technical features in the above embodiments also falls within the protection scope of the present invention.

[0086] The technical solution of this embodiment improves the accuracy of clutch fault detection by considering the impact of detection conditions such as the current fault status of the vehicle's associated components and the engine speed on clutch fault detection, thereby improving the safety factor of the vehicle.

[0087] Example 3

[0088] Figure 6 : is a schematic structural diagram of a clutch fault detection device provided by embodiment 3 of the present invention, such as Figure 6 As shown, the clutch fault detection device includes: a return valve opening control module 310 , a supercharger associated diagnostic pressure acquisition module 320 and a clutch fault detection module 330 .

[0089] Among them, the return valve opening control module 310 is used to control the return valve opening to slowly close when it is determined that the current vehicle state meets the clutch fault start-up detection conditions; the supercharger associated diagnostic pressure acquisition module 320 is used to obtain the supercharger associated diagnostic pressure in the process of controlling the return valve opening to slowly close; wherein, the supercharger associated diagnostic pressure includes the supercharger after-pressure and the throttle after-pressure; the clutch fault detection module 330 is used to determine that the clutch of the current vehicle has an undisengagement fault when it is determined that the supercharger associated diagnostic pressure meets the clutch disengagement fault detection conditions.

[0090] The embodiment of the present invention controls the return valve opening to slowly decrease upon determining that the current vehicle state satisfies the clutch fault initiation detection condition, and obtains supercharger-associated diagnostic pressures such as the supercharger rear pressure and the throttle rear pressure during the process of controlling the return valve opening to slowly decrease. Upon determining that the supercharger-associated diagnostic pressures satisfy the clutch disengagement fault detection condition, the embodiment of the present invention further determines that the clutch of the current vehicle has an undisengagement fault, thereby solving the problem in the prior art of ignoring the possible impact of clutch faults on vehicle safety, and can improve the accuracy of clutch fault detection, thereby improving the safety of the entire vehicle and the convenience of maintenance.

[0091] Optionally, the return valve opening control module 310 is specifically used to: obtain the associated component fault detection data of the current vehicle; determine the associated component fault status based on the associated component fault detection data; when it is determined that the associated component fault status is a non-fault state, determine that the current vehicle state meets the first clutch fault start detection condition; wherein the associated component fault detection data includes at least one of the following: intake manifold pressure sensor fault detection data, post-throttle pressure sensor fault detection data and mechanical supercharger return valve fault detection data.

[0092] Optionally, the return valve opening control module 310 is specifically used to: obtain the clutch fault diagnosis related data of the current vehicle; determine the current speed state of the engine based on the clutch fault diagnosis related data; and when it is determined that the current speed state of the engine meets the preset speed change state, determine that the current vehicle state meets the second clutch fault start-up detection condition.

[0093] Optionally, the return valve opening control module 310 is specifically used to: when it is determined that the current speed of the engine is within a preset speed range, determine that the current speed state of the engine satisfies a first preset speed change state; when it is determined that the speed change gradient of the current speed of the engine is less than a preset gradient threshold, determine that the current speed state of the engine satisfies a second preset speed change state.

[0094] Optionally, the supercharger associated diagnosis pressure acquisition module 320 is specifically configured to: acquire the intake manifold pressure and the intercooler pressure loss value; take the sum of the intake manifold pressure and the intercooler pressure loss value as the supercharger rear pressure; and determine the throttle rear pressure according to the pressure data collected by the throttle rear pressure sensor.

[0095] Optionally, the supercharger associated diagnosis pressure acquisition module 320 is specifically configured to: determine the intake manifold pressure according to the pressure data collected by the manifold pressure sensor; determine the gas flow according to the flow data collected by the air flow meter; and obtain the intercooler pressure loss value by querying the preset pressure loss calibration mapping relationship data according to the gas flow and the current rotating speed of the engine.

[0096] Optionally, the clutch fault detection module 330 is specifically configured to: calculate the size relationship between the supercharger rear pressure and the throttle rear pressure before the return valve opening degree is closed to the preset opening degree threshold value; calculate the duration that the supercharger rear pressure is greater than or equal to the throttle rear pressure in the case that the supercharger rear pressure is greater than or equal to the throttle rear pressure; and determine that the supercharger associated diagnosis pressure meets the clutch disengagement fault detection condition in the case that the duration is greater than or equal to the preset duration.

[0097] The clutch fault detection device provided in the embodiments of the present application can execute the clutch fault detection method provided in any of the embodiments of the present application, and has the corresponding function modules and beneficial effects of the execution method.

[0098] Embodiment four

[0099] Figure 7 A structural schematic diagram of an electronic device 10 that can be used to implement embodiments of the present application is shown. The electronic device is intended to represent various forms of digital computers, such as laptops, desktops, tablets, personal digital assistants, servers, blade servers, mainframes, and other appropriate computers. The electronic device can also represent various forms of mobile devices, such as personal digital processors, cellular telephones, smart phones, wearable devices (e.g., headsets, glasses, watches, etc.), and other similar computing devices. The components shown herein, their connections and relationships, and their functions, are meant to be examples only, and are not intended to limit the implementations of the present application described and / or claimed in this document.

[0100] As Figure 7As shown, the electronic device 10 includes at least one processor 11, and a memory, such as a read-only memory (ROM) 12, a random access memory (RAM) 13, etc., connected in communication with the at least one processor 11, wherein the memory stores a computer program executable by the at least one processor. The processor 11 can perform various appropriate actions and processes according to the computer program stored in the read-only memory (ROM) 12 or loaded from the storage unit 18 into the random access memory (RAM) 13. In the RAM 13, various programs and data required for the operation of the electronic device 10 can also be stored. The processor 11, the ROM 12, and the RAM 13 are connected to each other through a bus 14. An input / output (I / O) interface 15 is also connected to the bus 14.

[0101] A plurality of components in the electronic device 10 are connected to the I / O interface 15, including: an input unit 16, such as a keyboard, a mouse, etc.; an output unit 17, such as various types of displays, a loudspeaker, etc.; a storage unit 18, such as a magnetic disk, an optical disk, etc.; and a communication unit 19, such as a network card, a modem, a wireless communication transceiver, etc. The communication unit 19 allows the electronic device 10 to exchange information / data with other devices through a computer network, such as the Internet, and / or various telecommunication networks.

[0102] The processor 11 can be various general-purpose and / or special-purpose processing components with processing and computing capabilities. Some examples of the processor 11 include, but are not limited to, a central processing unit (CPU), a graphics processing unit (GPU), various special-purpose artificial intelligence (AI) computing chips, various processors running machine learning model algorithms, a digital signal processor (DSP), and any appropriate processor, controller, microcontroller, etc. The processor 11 performs various methods and processes described above, such as the clutch failure detection method described in embodiments of the present application.

[0103] That is, in a case where it is determined that the current vehicle state satisfies the clutch failure start detection condition, the return flow valve opening degree is slowly closed; in the process of slowly closing the return flow valve opening degree, a supercharger related diagnosis pressure is obtained; wherein the supercharger related diagnosis pressure includes a supercharger rear pressure and a throttle valve rear pressure; in a case where it is determined that the supercharger related diagnosis pressure satisfies the clutch disengagement failure detection condition, it is determined that the clutch of the current vehicle has a failure of being unable to disengage.

[0104] In some embodiments, the clutch fault detection method can be implemented as a computer program tangibly embodied in a computer-readable storage medium, such as storage unit 18. In some embodiments, part or all of the computer program can be loaded and / or installed on electronic device 10 via ROM 12 and / or communication unit 19. When the computer program is loaded into RAM 13 and executed by processor 11, one or more steps of the clutch fault detection method described above can be performed. Alternatively, in other embodiments, processor 11 can be configured to execute the clutch fault detection method described in various embodiments of the present invention in any other suitable manner (e.g., via firmware).

[0105] Various embodiments of the systems and techniques described herein can be implemented in digital electronic circuit systems, integrated circuit systems, field programmable gate arrays (FPGAs), application specific integrated circuits (ASICs), application specific standard products (ASSPs), system-on-chip systems (SOCs), programmable logic devices (CPLDs), computer hardware, firmware, software, and / or combinations thereof. These various embodiments can include being implemented in one or more computer programs that are executable and / or interpreted on a programmable system that includes at least one programmable processor, which can be a special purpose or general purpose programmable processor that can receive data and instructions from a storage system, at least one input device, and at least one output device, and transmit data and instructions to the storage system, the at least one input device, and the at least one output device.

[0106] Computer programs for implementing the methods of the present invention may be written in any combination of one or more programming languages. These computer programs may be provided to a processor of a general-purpose computer, a special-purpose computer, or other programmable data processing device, such that when the computer program is executed by the processor, the functions / operations specified in the flowcharts and / or block diagrams are implemented. The computer program may be executed entirely on the machine, partially on the machine, as a stand-alone software package, partially on the machine and partially on a remote machine, or entirely on a remote machine or server.

[0107] In the context of the present invention, computer-readable storage media can be tangible media that can contain or store a computer program for use with an instruction execution system, device or equipment or used in combination with an instruction execution system, device or equipment. Computer-readable storage media can include but are not limited to electronic, magnetic, optical, electromagnetic, infrared or semiconductor systems, devices or equipment, or any suitable combination of the foregoing. Alternatively, computer-readable storage media can be machine-readable signal media. More specific examples of machine-readable storage media can include electrical connections based on one or more lines, portable computer disks, hard disks, random access memories (RAM), read-only memories (ROM), erasable programmable read-only memories (EPROM or flash memory), optical fibers, portable compact disk read-only memories (CD-ROM), optical storage devices, magnetic storage devices, or any suitable combination of the foregoing.

[0108] To provide interaction with a user, the systems and techniques described herein can be implemented on an electronic device having: a display device (e.g., a CRT (cathode ray tube) or LCD (liquid crystal display) monitor) for displaying information to the user; and a keyboard and pointing device (e.g., a mouse or trackball) through which the user can provide input to the electronic device. Other types of devices can also be used to provide interaction with the user; for example, the feedback provided to the user can be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and the input from the user can be received in any form (including acoustic input, voice input, or tactile input).

[0109] The systems and techniques described herein can be implemented in a computing system that includes back-end components (e.g., as a data server), or a computing system that includes middleware components (e.g., an application server), or a computing system that includes front-end components (e.g., a user computer with a graphical user interface or web browser through which a user can interact with implementations of the systems and techniques described herein), or a computing system that includes any combination of such back-end components, middleware components, or front-end components. The components of the system can be interconnected by any form or medium of digital data communication (e.g., a communication network). Examples of communication networks include: a local area network (LAN), a wide area network (WAN), a blockchain network, and the Internet.

[0110] A computing system may include clients and servers. The clients and servers are typically remote from each other and typically interact via a communication network. This client-server relationship arises through computer programs running on the respective computers, creating a client-server relationship. The server may be a cloud server, also known as a cloud computing server or cloud host. This server is a hosting product within the cloud computing service ecosystem that addresses the management difficulties and limited scalability of traditional physical hosting and VPS services.

[0111] It should be understood that the various forms of the processes shown above can be used to reorder, add, or delete steps. For example, the steps described in the present invention can be performed in parallel, sequentially, or in a different order, as long as the desired results of the technical solution of the present invention can be achieved. This is not limited herein.

[0112] The above specific embodiments do not limit the scope of protection of the present invention. Those skilled in the art will appreciate that various modifications, combinations, sub-combinations, and substitutions may be made based on design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention are intended to be included within the scope of protection of the present invention.

Claims

1. A clutch fault detection method, characterized in that: include: When it is determined that the current vehicle state meets the clutch fault start detection conditions, the opening of the return valve is controlled to slowly decrease; In the process of controlling the return valve opening to slowly decrease, obtaining the supercharger-related diagnostic pressure; wherein the supercharger-related diagnostic pressure includes the supercharger after-pressure and the throttle after-pressure; When it is determined that the supercharger-associated diagnostic pressure satisfies the clutch disengagement fault detection condition, it is determined that the clutch of the current vehicle has an undisengagement fault.

2. The method according to claim 1, characterized in that Determining that the current vehicle state satisfies the clutch fault start detection condition includes: Acquiring fault detection data of associated components of the current vehicle; determining a fault state of an associated device according to the associated device fault detection data; In the case where it is determined that the fault state of the associated component is a non-fault state, determining that the current vehicle state meets the first clutch fault start detection condition; The associated component fault detection data includes at least one of the following: intake manifold pressure sensor fault detection data, post-throttle pressure sensor fault detection data, and supercharger return valve fault detection data.

3. The method according to claim 2, characterized in that After determining that the current vehicle state meets the first clutch fault start detection condition, the method further includes: Acquiring clutch fault diagnosis related data of the current vehicle; determining a current engine speed state according to the clutch fault diagnosis associated data; In the case where it is determined that the current speed state of the engine meets the preset speed change state, it is determined that the current vehicle state meets the second clutch fault start detection condition.

4. The method according to claim 3, characterized in that The determining whether the current speed state of the engine satisfies a preset speed change state includes: When it is determined that the current speed of the engine is within the preset speed range, determining that the current speed state of the engine satisfies a first preset speed change state; When it is determined that the speed change gradient of the current speed of the engine is less than a preset gradient threshold, it is determined that the current speed state of the engine meets a second preset speed change state.

5. The method according to claim 1, wherein The obtaining of the supercharger-related diagnostic pressure includes: Get the intake manifold pressure and intercooler pressure loss values; The sum of the intake manifold pressure and the intercooler pressure loss value is used as the supercharger post-pressure; The post-throttle pressure is determined according to pressure data collected by a post-throttle pressure sensor.

6. The method according to claim 5, characterized in that The obtaining of the intake manifold pressure and the intercooler pressure loss value includes: determining the intake manifold pressure according to pressure data collected by a manifold pressure sensor; Determine the gas flow rate based on the flow data collected by the air flow meter; The preset pressure loss calibration mapping relationship data is queried according to the gas flow rate and the current speed of the engine to obtain the intercooler pressure loss value.

7. The method according to claim 1, characterized in that Determining that the supercharger-associated diagnostic pressure satisfies a clutch disengagement fault detection condition includes: Before closing the return valve opening to a preset opening threshold, calculating the magnitude relationship between the supercharger post-pressure and the throttle post-pressure; When it is determined that the pressure after the supercharger is greater than or equal to the pressure after the throttle valve, calculating a duration during which the pressure after the supercharger is greater than or equal to the pressure after the throttle valve; When it is determined that the duration is greater than or equal to the preset duration, it is determined that the supercharger-associated diagnostic pressure meets the clutch disengagement fault detection condition.

8. A clutch fault detection device, characterized in that: include: The return valve opening control module is used to control the return valve opening to slowly close when it is determined that the current vehicle state meets the clutch fault start detection conditions; A supercharger-related diagnostic pressure acquisition module is used to acquire the supercharger-related diagnostic pressure during the process of slowly closing the return valve opening; wherein the supercharger-related diagnostic pressure includes the supercharger post-pressure and the throttle post-pressure; The clutch fault detection module is used to determine that the clutch of the current vehicle has an undisengageable fault when it is determined that the supercharger-associated diagnostic pressure meets the clutch disengagement fault detection condition.

9. An electronic device, characterized in that: The electronic device comprises: at least one processor; and a memory communicatively connected to the at least one processor; wherein, The memory stores a computer program executable by the at least one processor. The computer program is executed by the at least one processor so that the at least one processor can perform the clutch fault detection method according to any one of claims 1 to 7.

10. A computer-readable storage medium, characterized in that The computer-readable storage medium stores computer instructions, and the computer instructions are used to enable a processor to implement the clutch fault detection method according to any one of claims 1 to 7 when executed.

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