Fault diagnosis and fault avoidance method and device for electric vehicle circulating water pump

Abstract

The present invention provides a method and device for diagnosing and avoiding faults in a circulating water pump of an electric vehicle. The method comprises: obtaining a first control instruction for the circulating water pump; wherein the first control instruction is to control the circulating water pump to reach a first target speed; controlling the circulating water pump to execute the first control instruction; collecting feedback from the circulating water pump after executing the first control instruction; and determining whether an abnormality has occurred in the circulating water pump based on the first control instruction and the feedback. This allows for immediate identification of circulating water pump abnormalities, saving time and cost. Relevant processing / responses can also be promptly implemented to avoid impacting relevant functions of the circulating water pump in operational scenarios, thus meeting the user's requirement for quickly locating circulating water pump abnormalities during overall use.

Description

Technical Field

[0001] The present application relates to the field of vehicle design, and in particular to a method and device for diagnosing and avoiding faults of a circulating water pump of an electric vehicle. Background Art

[0002] Most existing automotive water pump fault diagnosis solutions are based on experience, relying on manual observation of abnormalities (e.g., leaks, impeller corrosion based on coolant color) to determine if the pump is malfunctioning. These methods are unable to immediately identify circulating water pump failures and fail to meet user requirements for quickly locating circulating water pump anomalies during overall operation.

[0003] Furthermore, in the current automotive water pump fault diagnosis scheme, due to the time delay in fault diagnosis, when an abnormality occurs in the water pump (whether the water pump is leaking, whether the water pump impeller is corroded based on the color of the coolant, etc.), relevant processing / response cannot be made in time, thereby affecting the relevant functions of the water pump in the usage scenario (failure / damage).

[0004] In view of this, the present application is proposed to at least partially solve the technical problems existing in the prior art. Summary of the Invention

[0005] Most automotive water pump fault diagnosis solutions are based on experience, manually observing abnormalities in the circulating water pump to determine whether the pump is malfunctioning. These methods are unable to immediately identify abnormalities in the circulating water pump, provide timely action or respond, and fail to meet the user's requirement for quickly locating abnormalities during the overall operation of the circulating water pump.

[0006] According to a first aspect of the present invention, a method for diagnosing and avoiding faults of a circulating water pump of an electric vehicle is provided, the method comprising:

[0007] Obtaining a first control instruction for the circulating water pump; wherein the first control instruction is to control the circulating water pump to reach a first target speed;

[0008] Controlling the circulating water pump to execute the first control instruction;

[0009] Collect feedback results after the circulating water pump executes the first control instruction;

[0010] Based on the first control instruction and the feedback result, it is determined whether an abnormality occurs in the circulating water pump.

[0011] Preferably, the feedback result is the actual rotation speed of the circulating water pump.

[0012] Preferably, based on the first control instruction and the feedback result, determining whether the circulating water pump is abnormal includes:

[0013] When the actual rotation speed reaches the first target rotation speed, it is determined that the circulating water pump has no abnormality; and when the actual rotation speed does not reach the first target rotation speed, it is determined that the circulating water pump has an abnormality.

[0014] Preferably, the actual speed failing to reach the first target speed includes:

[0015] The actual speed is lower than the first target speed by a first preset value, and the actual speed is higher than the first target speed by a second preset value.

[0016] Preferably, after determining whether the circulating water pump is abnormal based on the first control instruction and the feedback result, the method further includes:

[0017] When it is determined that the circulating water pump is abnormal, the control performs abnormal avoidance.

[0018] Preferably, when it is determined that the circulating water pump is abnormal, controlling the abnormality avoidance includes:

[0019] When the actual rotation speed is lower than the first target rotation speed, the cooling fan is controlled to run at the highest rotation speed to achieve the purpose of heat dissipation, and the information that the circulating water pump is abnormal is displayed to the user.

[0020] Preferably, when it is determined that the circulating water pump is abnormal, controlling the abnormality avoidance includes:

[0021] When the actual speed is higher than the first target speed, a second control instruction is sent to reduce the speed of the circulating water pump so that the circulating water pump reaches the second target speed; and information about the abnormality of the circulating water pump is displayed to the user.

[0022] According to a second aspect of the present invention, there is provided a fault diagnosis and fault avoidance device for a circulating water pump of an electric vehicle, the device comprising:

[0023] An acquisition module is used to acquire a first control instruction for the circulating water pump; wherein the first control instruction is to control the circulating water pump to reach a first target speed;

[0024] An execution module, used for controlling the circulating water pump to execute a first control instruction;

[0025] An acquisition module is used to acquire feedback results after the circulating water pump executes the first control instruction;

[0026] The judgment module is used to judge whether an abnormality occurs in the circulating water pump based on the first control instruction and the feedback result.

[0027] Preferably, the feedback result is the actual rotation speed of the circulating water pump.

[0028] Preferably, the judgment module is used to:

[0029] When the actual rotation speed reaches the first target rotation speed, it is determined that the circulating water pump has no abnormality; and when the actual rotation speed does not reach the first target rotation speed, it is determined that the circulating water pump has an abnormality.

[0030] Preferably, the actual speed failing to reach the first target speed includes:

[0031] The actual speed is lower than the first target speed by a first preset value, and the actual speed is higher than the first target speed by a second preset value.

[0032] Preferably, the device further comprises:

[0033] The abnormality avoidance module is used to control the abnormality avoidance when it is determined that the circulating water pump has an abnormality.

[0034] Preferably, the abnormal avoidance module is used to:

[0035] When the actual rotation speed is lower than the first target rotation speed, the cooling fan is controlled to run at the highest rotation speed to achieve the purpose of heat dissipation, and the information that the circulating water pump is abnormal is displayed to the user.

[0036] Preferably, the abnormal avoidance module is used to:

[0037] When the actual speed is higher than the first target speed, a second control instruction is sent to reduce the speed of the circulating water pump so that the circulating water pump reaches the second target speed; and information about the abnormality of the circulating water pump is displayed to the user.

[0038] According to a third aspect of the present invention, there is provided an electronic device, the electronic device comprising: a processor and a memory storing computer program instructions;

[0039] When the processor executes the computer program instructions, any one of the above-mentioned fault diagnosis and fault avoidance methods for the electric vehicle circulating water pump is implemented.

[0040] According to a fourth aspect of the present invention, a computer-readable storage medium is provided, on which computer program instructions are stored. When the computer program instructions are executed by a processor, any of the above-mentioned fault diagnosis and fault avoidance methods for an electric vehicle circulating water pump is implemented.

[0041] In summary, the present invention provides a method for diagnosing and avoiding faults in a circulating water pump of an electric vehicle. The method comprises: obtaining a first control instruction for the circulating water pump; wherein the first control instruction is to control the circulating water pump to reach a first target speed; controlling the circulating water pump to execute the first control instruction; collecting feedback from the circulating water pump after executing the first control instruction; and determining whether an abnormality has occurred in the circulating water pump based on the first control instruction and the feedback. This allows for immediate identification of circulating water pump abnormalities, saving time and cost. Furthermore, the method allows for timely processing / response, avoiding impacts on relevant functions of the circulating water pump in its intended use scenario, thereby satisfying the user's requirement for quickly locating circulating water pump abnormalities during overall use. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] In order to more clearly illustrate the specific implementation methods of the present application or the technical solutions in the prior art, the following is a brief introduction to the drawings required for use in the specific implementation methods or the description of the prior art. Obviously, the drawings described below are some implementation methods of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0043] Figure 1 A flowchart of a method for diagnosing and avoiding faults of a circulating water pump of an electric vehicle provided in an embodiment of the present application;

[0044] Figure 2 A flowchart of a method for diagnosing and avoiding faults of a circulating water pump of an electric vehicle provided in an embodiment of the present application;

[0045] Figure 3 This is an architectural diagram of a method for fault diagnosis and fault avoidance of an electric vehicle circulating water pump provided in an embodiment of the present application;

[0046] Figure 4 is a schematic diagram of a first target speed and an actual speed according to an embodiment of the present application;

[0047] Figure 5 is a schematic diagram of a first target speed and an actual speed according to an embodiment of the present application;

[0048] Figure 6 A structural diagram of a fault diagnosis and fault avoidance device for an electric vehicle circulating water pump provided in an embodiment of the present application;

[0049] Figure 7 A structural diagram of a fault diagnosis and fault avoidance device for an electric vehicle circulating water pump provided in an embodiment of the present application;

[0050] Figure 8 A structural diagram of an electronic device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0051] In order to make the above and other features and advantages of the present application more clear, the present application is further described below with reference to the accompanying drawings. It should be understood that the specific embodiments given herein are for the purpose of explaining to those skilled in the art and are only exemplary and not restrictive.

[0052] In the following description, many specific details are set forth to provide a thorough understanding of the present application. However, it will be apparent to one of ordinary skill in the art that specific details are not required to practice the present application. In other cases, well-known steps or operations are not described in detail to avoid obscuring the present application.

[0053] Most automotive water pump fault diagnosis solutions are based on experience, relying on manual observation of abnormalities in the circulating water pump to determine whether the pump is abnormal. This makes it difficult to immediately identify abnormalities in the circulating water pump and provide timely processing or responses, failing to meet user requirements for quickly locating abnormalities in the overall operation of the circulating water pump.

[0054] refer to Figure 1 The present application provides a method for diagnosing and avoiding faults of a circulating water pump of an electric vehicle, the method comprising:

[0055] S110, obtaining a first control instruction for a circulating water pump; wherein the first control instruction is to control the circulating water pump to reach a first target speed.

[0056] S120, controlling the circulating water pump to execute a first control instruction.

[0057] The execution subject of this application is the vehicle control unit (VCU), which can be combined with the application of the water pump in actual scenarios to complete the diagnosis of abnormalities in the circulating water pump. Specifically, after the vehicle controller obtains the first control instruction for the circulating water pump, it can control the circulating water pump to execute the first control instruction so that the circulating water pump reaches the first target speed (required speed). The first control instruction is controlled by the PWM (Pulse Width Modulation Wave) wave of the vehicle controller.

[0058] S130, collecting feedback results after the circulating water pump executes the first control instruction.

[0059] Specifically, the vehicle controller may collect the feedback result after the circulating water pump executes the first control instruction through the hard-wired PIN pin, wherein the feedback result is the actual rotation speed of the circulating water pump.

[0060] S140: Based on the first control instruction and the feedback result, determine whether the circulating water pump has an abnormality.

[0061] Specifically, the vehicle controller can determine that the circulating water pump has no abnormality when the actual speed reaches the first target speed; and determine that the circulating water pump has an abnormality when the actual speed does not reach the first target speed.

[0062] The first target speed is determined based on the actual application scenario of the circulating water pump. The duration of the first target speed and the delay time after shutdown are determined according to the vehicle's control logic. The actual speed is related to parameters such as the sensor accuracy of the circulating water pump and the acquisition accuracy of the PIN pin. Therefore, the actual speed can be a value that fluctuates around the first target speed. Accordingly, the actual speed reaching the first target speed means that the actual speed is within this fluctuating range; the actual speed not reaching the first target speed means that the actual speed exceeds this fluctuation range.

[0063] Furthermore, for different vehicle models (different parameters such as the sensor accuracy of the circulating water pump and the acquisition accuracy of the PIN pin), the actual speed exceeding the allowable range means that the actual speed is lower than the first target speed and reaches the first preset value, and the actual speed is higher than the first target speed and reaches the second preset value. Among them, the first preset value and the second preset value are non-negative values, and the first preset value can be equal to the second preset value or not. Furthermore, the actual speed is lower than the first target speed and reaches the first preset value means that the actual speed is lower than the first target speed and the absolute value of the difference is greater than the first preset value; the actual speed is higher than the first target speed and reaches the second preset value means that the actual speed is higher than the first target speed and the absolute value of the difference is greater than the second preset value.

[0064] Therefore, the vehicle controller can determine whether an abnormality occurs in the circulating water pump based on the first control instruction and the feedback result.

[0065] In a further embodiment, Figure 2-Figure 3 As shown, the method further includes:

[0066] S150: When it is determined that the circulating water pump is abnormal, the control is to perform abnormal avoidance.

[0067] Specifically, if the actual speed is lower than the first target speed, the cooling fan is controlled to operate at the maximum speed to achieve heat dissipation, and a message indicating a circulating water pump abnormality is displayed to the user. If the actual speed is higher than the first target speed, a second control instruction is sent to reduce the speed of the circulating water pump so that the circulating water pump reaches the second target speed; and a message indicating a circulating water pump abnormality is displayed to the user. The second target speed is lower than the first target speed.

[0068] In some embodiments, as Figure 4As shown in the figure, the VCU issues a PWM command for the required speed of the water pump based on the actual application scenario requirements. The VCU also collects the actual working status of the water pump (actual water pump speed). The VCU comprehensively judges the working status and abnormal status of the water pump based on the PWM command for the required speed of the water pump and the feedback speed of the water pump. The judgment is as follows:

[0069] Pump stall: When the VCU sends a high speed demand and the actual feedback speed is lower than a certain value and lasts for a certain period of time, the VCU considers that the pump is stalled.

[0070] When the VCU determines that the water pump is blocked: the water pump is blocked, the actual speed cannot reach the required speed, and the water pump cannot meet the cooling requirements, the VCU can control the cooling fan to run at the highest speed to achieve the purpose of heat dissipation and prompt the user that the water pump is abnormal;

[0071] In other embodiments, Figure 5 As shown in the figure, the VCU issues a PWM command for the required speed of the water pump based on the actual application scenario requirements. The VCU also collects the actual working status of the water pump (actual water pump speed). The VCU comprehensively judges the working status and abnormal status of the water pump based on the PWM command for the required speed of the water pump and the feedback speed of the water pump. The judgment is as follows:

[0072] Water pump idling: When the vehicle controller sends a low speed demand, and the actual feedback speed is higher than a certain value and lasts for a certain period of time, the vehicle controller considers that the water pump has an idling fault.

[0073] When the VCU determines that the water pump is idling, the actual speed exceeds the required speed, and the VCU can appropriately reduce the required speed PWM instruction and prompt the user that the water pump is abnormal.

[0074] like Figure 6 As shown, the present invention provides a fault diagnosis and fault avoidance device for a circulating water pump of an electric vehicle, the device comprising:

[0075] The acquisition module 601 is configured to acquire a first control instruction for the circulating water pump; wherein the first control instruction is to control the circulating water pump to reach a first target speed.

[0076] The execution module 602 is used to control the circulating water pump to execute the first control instruction.

[0077] The execution subject of this application is the vehicle control unit (VCU), which can be combined with the application of the water pump in actual scenarios to complete the diagnosis of abnormalities in the circulating water pump. Specifically, after the vehicle controller obtains the first control instruction for the circulating water pump, it can control the circulating water pump to execute the first control instruction so that the circulating water pump reaches a first target speed. The first control instruction is controlled by the PWM (Pulse Width Modulation Wave) wave of the vehicle controller.

[0078] The collection module 603 is used to collect the feedback result after the circulating water pump executes the first control instruction.

[0079] Specifically, the vehicle controller may collect the feedback result after the circulating water pump executes the first control instruction through the hard-wired PIN pin, wherein the feedback result is the actual rotation speed of the circulating water pump.

[0080] The judgment module 604 is used to judge whether an abnormality occurs in the circulating water pump based on the first control instruction and the feedback result.

[0081] Specifically, the vehicle controller can determine that the circulating water pump has no abnormality when the actual speed reaches the first target speed; and determine that the circulating water pump has an abnormality when the actual speed does not reach the first target speed.

[0082] The first target speed is determined based on the actual application scenario of the circulating water pump. The duration of the first target speed and the delay time after shutdown are determined according to the vehicle's control logic. The actual speed is related to parameters such as the sensor accuracy of the circulating water pump and the acquisition accuracy of the PIN pin. Therefore, the actual speed can be a value that fluctuates around the first target speed. Accordingly, the actual speed reaching the first target speed means that the actual speed is within this fluctuating range; the actual speed not reaching the first target speed means that the actual speed exceeds this fluctuation range.

[0083] Furthermore, for different vehicle models (different parameters such as the sensor accuracy of the circulating water pump and the acquisition accuracy of the PIN pin), the actual speed exceeding the allowable range means that the actual speed is lower than the first target speed and reaches the first preset value, and the actual speed is higher than the first target speed and reaches the second preset value. Among them, the first preset value and the second preset value are non-negative values, and the first preset value can be equal to the second preset value or not. Furthermore, the actual speed is lower than the first target speed and reaches the first preset value means that the actual speed is lower than the first target speed and the absolute value of the difference is greater than the first preset value; the actual speed is higher than the first target speed and reaches the second preset value means that the actual speed is higher than the first target speed and the absolute value of the difference is greater than the second preset value.

[0084] Therefore, the vehicle controller can determine whether an abnormality occurs in the circulating water pump based on the first control instruction and the feedback result.

[0085] In a further embodiment, Figure 7 As shown, the device also includes:

[0086] The abnormality avoidance module 605 is used to control the abnormality avoidance when it is determined that the circulating water pump has an abnormality.

[0087] Specifically, if the actual speed is lower than the first target speed, the cooling fan is controlled to operate at the maximum speed to achieve heat dissipation, and a message indicating a circulating water pump abnormality is displayed to the user. If the actual speed is higher than the first target speed, a second control instruction is sent to reduce the speed of the circulating water pump so that the circulating water pump reaches the second target speed; and a message indicating a circulating water pump abnormality is displayed to the user. The second target speed is lower than the first target speed.

[0088] like Figure 8 As shown, the present invention provides an electronic device, the electronic device comprising: a processor 801 and a memory 802 storing computer program instructions;

[0089] When the processor 801 executes the computer program instructions, it implements any of the above-mentioned fault diagnosis and fault avoidance methods for the circulating water pump of the electric vehicle.

[0090] The present invention provides a computer-readable storage medium having computer program instructions stored thereon. When the computer program instructions are executed by a processor, any one of the above-mentioned fault diagnosis and fault avoidance methods for a circulating water pump of an electric vehicle is implemented.

[0091] It should be understood that the specific features, operations, and details described hereinabove with respect to the method of the present application may also be similarly applied to the apparatus and system of the present application, or vice versa. In addition, each step of the method of the present application described above may be performed by a corresponding component or unit of the apparatus or system of the present application.

[0092] It should be understood that the various modules / units of the apparatus of the present application may be implemented in whole or in part via software, hardware, firmware, or a combination thereof. Each module / unit may be embedded in a computer device's processor in hardware or firmware form or independent of the processor, or may be stored in a computer device's memory in software form for the processor to call to execute the operations of each module / unit. Each module / unit may be implemented as an independent component or module, or two or more modules / units may be implemented as a single component or module. In one embodiment, a computer device is provided, comprising a memory and a processor, the memory storing computer instructions executable by the processor, which, when executed by the processor, instructs the processor to perform the various steps of the method of the embodiments of the present application. The computer device may broadly be a server, a terminal, or any other electronic device with the necessary computing and / or processing capabilities. In one embodiment, the computer device may include a processor, memory, a network interface, a communication interface, etc., connected via a system bus. The processor of the computer device may be used to provide the necessary computing, processing, and / or control capabilities. The memory of the computer device may include a non-volatile storage medium and internal memory. The non-volatile storage medium may store an operating system, a computer program, etc. The internal memory can provide an environment for the operation of the operating system and computer program in the non-volatile storage medium. The network interface and communication interface of the computer device can be used to connect to and communicate with external devices via a network. When the computer program is executed by the processor, the steps of the method of the present application are performed.

[0093] The present application can be implemented as a computer-readable storage medium having a computer program stored thereon, which causes the steps of the method of the embodiment of the present application to be executed when executed by a processor. In one embodiment, the computer program is distributed on a plurality of computer devices or processors coupled to a network so that the computer program is stored, accessed, and executed in a distributed manner by one or more computer devices or processors. A single method step / operation, or two or more method steps / operations, can be performed by a single computer device or processor or by two or more computer devices or processors. One or more method steps / operations can be performed by one or more computer devices or processors, and one or more other method steps / operations can be performed by one or more other computer devices or processors. One or more computer devices or processors can perform a single method step / operation, or perform two or more method steps / operations.

[0094] It will be understood by those skilled in the art that the method steps of the present application can be performed by instructing relevant hardware such as a computer device or a processor through a computer program, and the computer program can be stored in a non-transitory computer-readable storage medium, which causes the steps of the present application to be performed when the computer program is executed. Depending on the circumstances, any reference to memory, storage, database or other media herein may include non-volatile and / or volatile memory. Examples of non-volatile memory include read-only memory (ROM), programmable ROM (PROM), electrically programmable ROM (EPROM), electrically erasable programmable ROM (EEPROM), flash memory, magnetic tape, floppy disk, magneto-optical data storage device, optical data storage device, hard disk, solid-state disk, etc. Examples of volatile memory include random access memory (RAM), external cache memory, etc.

[0095] The various technical features described above can be combined arbitrarily. Although not all possible combinations of these technical features are described, any combination of these technical features should be considered to be covered by this specification as long as such combination does not conflict.

[0096] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A method for fault diagnosis and fault avoidance of an electric vehicle circulating water pump, characterized in that: The method comprises: Obtaining a first control instruction for a circulating water pump; wherein the first control instruction is to control the circulating water pump to reach a first target speed; controlling the circulating water pump to execute the first control instruction; collecting feedback results after the circulating water pump executes the first control instruction; Based on the first control instruction and the feedback result, determining whether the circulating water pump has an abnormality; the feedback result is the actual speed of the circulating water pump; When it is determined that the circulating water pump is abnormal, controlling the abnormality avoidance; When it is determined that the circulating water pump is abnormal, controlling the abnormality avoidance includes: When the actual rotation speed is lower than the first target rotation speed, the cooling fan is controlled to run at the highest rotation speed to achieve the purpose of heat dissipation, and the information that the circulating water pump is abnormal is displayed to the user.

2. The fault diagnosis and fault avoidance method for the electric vehicle circulating water pump according to claim 1, characterized in that: The determining whether the circulating water pump is abnormal based on the first control instruction and the feedback result includes: When the actual speed reaches the first target speed, determining that there is no abnormality in the circulating water pump; Furthermore, when the actual rotation speed does not reach the first target rotation speed, it is determined that an abnormality occurs in the circulating water pump.

3. The fault diagnosis and fault avoidance method for the electric vehicle circulating water pump according to claim 2, characterized in that: The actual speed not reaching the first target speed includes: The actual speed is lower than the first target speed by a first preset value, and the actual speed is higher than the first target speed by a second preset value.

4. The method for fault diagnosis and avoidance of a circulating water pump of an electric vehicle according to claim 3, characterized in that: When it is determined that the circulating water pump is abnormal, controlling the abnormality avoidance includes: When the actual speed is higher than the first target speed, a second control instruction is sent to reduce the speed of the circulating water pump so that the circulating water pump reaches the second target speed; and information about the abnormality of the circulating water pump is displayed to the user.

5. A fault diagnosis and fault avoidance device for an electric vehicle circulating water pump, characterized in that: The device comprises: an acquisition module, configured to acquire a first control instruction for a circulating water pump; wherein the first control instruction is to control the circulating water pump to reach a first target speed; an execution module, configured to control the circulating water pump to execute the first control instruction; an acquisition module, configured to acquire a feedback result after the circulating water pump executes the first control instruction; the feedback result is an actual speed of the circulating water pump; a judgment module, configured to judge whether an abnormality occurs in the circulating water pump based on the first control instruction and the feedback result; The abnormality avoidance module is used to control the abnormality avoidance when it is determined that the circulating water pump has an abnormality; when the actual speed is lower than the first target speed, the cooling fan is controlled to run at the highest speed to achieve the purpose of heat dissipation, and the information about the abnormality of the circulating water pump is displayed to the user.

6. An electronic device, characterized in that: The electronic device includes: a processor and a memory storing computer program instructions; When the processor executes the computer program instructions, the fault diagnosis and fault avoidance method of the electric vehicle circulating water pump as described in any one of claims 1 to 4 is implemented.

7. A computer-readable storage medium, characterized in that The computer-readable storage medium stores computer program instructions, and when the computer program instructions are executed by the processor, the fault diagnosis and fault avoidance method of the electric vehicle circulating water pump according to any one of claims 1 to 4 is implemented.

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