Engine water pump monitoring method and device and storage medium

Abstract

The invention discloses an engine water pump monitoring method and device and a storage medium, and belongs to the technical field of measurement control. The method comprises the steps that in response to electrification of an ignition switch of the vehicle, storage battery voltage, the rotating speed of a water pump of an engine, feedback current of the water pump and water temperature of the water pump are obtained; determining a current diagnosis threshold based on the rotating speed of the water pump and the battery voltage; in response to the fact that the feedback current of the water pump is larger than the current diagnosis threshold value and lasts for a first duration, the target rotating speed of the water pump is adjusted to a first target rotating speed and lasts for a second duration; controlling the cumulative number of faults to increase once, wherein the initial value of the cumulative number of faults is 0; based on the water temperature of the water pump, an early-warning boundary threshold value of the fault accumulated number is determined; and in response to the fact that the accumulated number of faults does not reach the early warning boundary threshold value and is larger than 0, controlling a fault indicating lamp of the vehicle to be lightened. Therefore, the abnormal rotating speed of the water pump can be timely adjusted and early warned, the problem that the water temperature of an engine is over-high is avoided, and the safety of a vehicle is guaranteed.

Description

Technical Field

[0001] The embodiments of the present application relate to the field of vehicle control technology, and in particular to a monitoring method, device, and storage medium for an engine water pump. Background Art

[0002] With the increasing number of hybrid vehicles, some quality issues have emerged during the development process, such as engine water overheating, which can limit vehicle power and endanger driving safety. The engine water pump is a critical component for balancing the thermal management needs of the engine itself, and engine water overheating can be caused by issues with the engine water pump speed.

[0003] Therefore, how to monitor the water temperature of the water pump and promptly issue warnings and adjustments when the water pump speed is abnormal, so as to avoid the problem of overheating of the water temperature of the engine water pump, is very important for ensuring the safety of the vehicle and avoiding power limitation of the vehicle. Summary of the Invention

[0004] The present invention provides a method, device, and storage medium for monitoring an engine water pump, which can be used to prevent the engine water pump from overheating. The technical solution is as follows:

[0005] In one aspect, an embodiment of the present application provides a method for monitoring an engine water pump, the method comprising:

[0006] In response to the vehicle's ignition switch being powered on, obtaining a battery voltage, a rotational speed of a water pump of the engine, a feedback current of the water pump, and a water temperature of the water pump;

[0007] determining a current diagnosis threshold based on a rotational speed of the water pump and a voltage of the battery;

[0008] In response to a feedback current of the water pump being greater than the current diagnosis threshold and lasting for a first time period, adjusting the target speed of the water pump to a first target speed and lasting for a second time period, wherein the first time period is less than the second time period;

[0009] The control fault cumulative number increases by one, and the initial value of the fault cumulative number is 0;

[0010] Determining a warning threshold for the cumulative number of failures based on the water temperature of the water pump;

[0011] In response to the cumulative number of faults not reaching the warning demarcation threshold and being greater than 0, a fault indicator light of the vehicle is controlled to light up.

[0012] In another aspect, a monitoring device for an engine water pump is provided, the device comprising:

[0013] an acquisition module, configured to acquire, in response to the vehicle's ignition switch being powered on, a battery voltage, a rotational speed of an engine water pump, a feedback current of the water pump, and a water temperature of the water pump;

[0014] a first determining module, configured to determine a current diagnosis threshold based on a rotational speed of the water pump and a voltage of the battery;

[0015] an adjustment module, configured to adjust the target speed of the water pump to a first target speed for a second time period in response to a feedback current of the water pump being greater than the current diagnostic threshold and lasting for a first time period, wherein the first time period is less than the second time period;

[0016] A first control module is used to control the cumulative number of faults to increase by one, wherein the initial value of the cumulative number of faults is 0;

[0017] A second determining module is used for determining a warning threshold value of the cumulative number of faults based on the water temperature of the water pump;

[0018] The second control module is configured to control a fault indicator light of the vehicle to light up in response to the accumulated number of faults not reaching the warning threshold and being greater than 0.

[0019] On the other hand, a non-temporary computer-readable storage medium is also provided, characterized in that a computer program is stored in the computer-readable storage medium, and the computer program is loaded and executed by a processor to implement any of the above-mentioned engine water pump monitoring methods.

[0020] On the other hand, a computer program product is also provided, which includes computer instructions, and when the computer instructions are executed by a processor, the steps of any of the above-mentioned engine water pump monitoring methods are implemented.

[0021] The technical solution provided by this application brings at least the following beneficial effects:

[0022] The present application obtains the battery voltage and the speed of the engine's water pump when the vehicle's ignition switch is powered on, and determines a current diagnostic threshold based on the water pump's speed and the battery voltage; if the water pump's feedback current is greater than the current diagnostic threshold and lasts for a first period of time, the water pump's speed is adjusted to a first target speed and lasts for a second period of time, and the cumulative number of faults is controlled to increase once; then the warning demarcation threshold of the cumulative number of faults is determined based on the water temperature of the water pump; if the cumulative number of faults does not reach the warning demarcation threshold and is greater than 0, the vehicle's fault indicator light is controlled to light up, thereby achieving timely adjustment and warning of abnormal water pump speed, avoiding the problem of engine water temperature overheating, and thus ensuring the safety of the vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present application, 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 application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0024] Figure 1 This is a schematic diagram of an implementation environment provided by an embodiment of the present application;

[0025] Figure 2 This is a flow chart of a method for monitoring an engine water pump provided in an embodiment of the present application;

[0026] Figure 3 This is a current diagnosis MAP (pulse spectrum) diagram provided in an embodiment of the present application;

[0027] Figure 4 This is a monitoring logic block diagram of an engine water pump provided by an embodiment of the present application;

[0028] Figure 5 It is a structural schematic diagram of an engine water pump monitoring device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0029] In order to make the objectives, technical solutions and advantages of this application clearer, the implementation methods of this application will be further described in detail below with reference to the accompanying drawings.

[0030] This application embodiment provides a method for monitoring an engine water pump. Figure 1 , which shows a schematic diagram of the implementation environment of the method provided in the embodiment of the present application. The implementation environment may include: EMS (Engine Management System) 11, KL15 (Key Line 15, ignition switch line 15) 12, ADC (Analog-to-Digital Converter) 13, Hall sensor 14, temperature sensor 15, intake manifold absolute pressure sensor 16, MIL (Malfunction Indicator Lamp) 17, and HCU (Hybrid Control Unit) 18.

[0031] Optionally, KL1512 is directly connected to EMS11 to obtain the power status of the ignition switch and upload it to EMS11; ADC13 is used to obtain the battery voltage and upload it to EMS11; the Hall sensor 14 is installed in the engine's water pump to output the frequency of the square wave pulse signal and upload it to EMS11, wherein the frequency of the square wave pulse signal is used to calculate the speed of the water pump; the temperature sensor 15 is integrated inside the water pump to directly obtain the water temperature of the water pump and upload it to EMS11; the intake manifold absolute pressure sensor 16 is used to obtain the intake manifold pressure and upload it to EMS11, wherein the intake manifold pressure is used for engine load.

[0032] In one possible implementation, MIL 17 is located on the vehicle dashboard and is used to indicate vehicle faults. HCU 18 is used to send a shutdown command to EMS 11 upon receiving a signal request to disable engine start. EMS 11, KL 1512, ADC 13, Hall sensor 14, temperature sensor 15, intake manifold absolute pressure sensor 16, MIL 17, and HCU 18 establish a communication connection via a wired or wireless network.

[0033] Based on the above Figure 1 In the implementation environment shown, the present application embodiment provides a method for monitoring an engine water pump. Figure 2 As shown, in the case where the method is applied to EMS, the method includes steps 201 to 206.

[0034] In step 201 , in response to the vehicle's ignition switch being powered on, the EMS obtains the battery voltage, the engine's water pump speed, the water pump's feedback current, and the water temperature of the water pump.

[0035] In one possible implementation, the EMS can directly obtain the power-on and power-off status of the ignition switch through KL15. The EMS is directly connected to KL15, and when it detects a voltage jump on KL15, it determines that the vehicle's ignition switch is powered on.

[0036] For example, when the ignition switch of the vehicle is powered on, the EMS obtains the battery voltage, the speed of the engine's water pump, the feedback current of the water pump and the water temperature of the water pump in ways including but not limited to: the EMS can obtain the battery voltage through the ADC; the EMS can collect the frequency of the square wave pulse signal output by the Hall sensor built into the engine's water pump, and then calculate the speed of the water pump based on the frequency of the square wave pulse signal; the EMS can connect a shunt resistor in series with the circuit where the water pump is located, differentially amplify the voltage drop across the shunt resistor through a current sensing amplifier, sample the amplified voltage signal, and then calculate the feedback current of the water pump based on the sampled voltage signal; the EMS can directly obtain the water temperature of the water pump through the temperature sensor integrated inside the water pump.

[0037] In step 202 , the EMS determines a current diagnostic threshold based on the speed of the water pump and the battery voltage.

[0038] Optionally, after obtaining the water pump speed and battery voltage, the EMS determines the current diagnostic threshold based on the water pump speed and battery voltage, including: using the feedback current value corresponding to the water pump speed and battery voltage in the current diagnostic MAP diagram as the current diagnostic threshold, and the current diagnostic MAP diagram includes the correspondence between the water pump speed and battery voltage and the feedback current of the water pump.

[0039] In a possible implementation, the current diagnosis MAP diagram can be determined in advance based on experiments, such as Figure 3 As shown, X is the speed of the water pump, Y is the battery voltage, and the intersection area of ​​the table is the feedback current of the water pump. The unit of the speed of the water pump can be RPM (Revolutions Per Minute), and the battery voltage can be mV (millivolt).

[0040] In step 203 , in response to the feedback current of the water pump being greater than the current diagnosis threshold and lasting for a first time period, the EMS adjusts the speed of the water pump to a first target speed and lasting for a second time period, where the first time period is less than the second time period.

[0041] For example, after obtaining the water pump feedback current and the current diagnostic threshold, the water pump feedback current is compared with the current diagnostic threshold. If the water pump feedback current is greater than the current diagnostic threshold, the duration for which the water pump feedback current is greater than the current diagnostic threshold is counted. If the water pump feedback current is greater than the current diagnostic threshold for a first duration, the EMS adjusts the water pump target speed to the first target speed for a second duration, where the first duration is less than the second duration.

[0042] In one possible implementation, the first target speed, the first duration, and the second duration can be set based on experience, and the first duration must be less than the second duration. For example, the first target speed can be set to 0, the first duration can be set to 500 milliseconds, and the second duration can be set to 3 seconds.

[0043] Optionally, after the second time period, the EMS obtains engine load and controls the rotation of the water pump based on the engine load and the water temperature of the water pump. Exemplarily, the EMS obtains engine load by, but is not limited to, obtaining intake manifold pressure via an intake manifold absolute pressure sensor and then determining the engine load based on the intake manifold pressure.

[0044] Exemplarily, after determining the engine load, controlling the water pump rotation based on the engine load and the water pump water temperature includes: calculating a second target speed of the water pump based on the engine load and the water pump water temperature; and controlling the water pump rotation at the second target speed. In one possible implementation, calculating the second target speed of the water pump based on the engine load and the water pump water temperature includes: using the rated speed corresponding to the engine load and the water pump water temperature in a rated speed map as the second target speed of the water pump. After determining the second target speed of the water pump, the EMS controls the water pump to resume rotation and uses the second target speed as the target speed of the water pump.

[0045] In step 204 , the EMS control fault cumulative number is increased by one, and the initial value of the fault cumulative number is 0.

[0046] In one possible implementation, after the feedback current of the water pump is greater than the current diagnostic threshold and lasts for a first period of time, the EMS controls the cumulative number of faults to increase once, where the initial value of the cumulative number of faults is 0, which is used to count the number of feedback current abnormalities, thereby facilitating the subsequent passing of the number of feedback current abnormalities.

[0047] In step 205 , the EMS determines a warning threshold for the cumulative number of failures based on the water temperature of the water pump.

[0048] Exemplarily, after starting to count the cumulative number of faults, the EMS determines the warning demarcation threshold of the cumulative number of faults based on the water temperature of the water pump, including: in response to the water temperature of the water pump being less than or equal to the temperature threshold, determining the warning demarcation threshold to be the first number; in response to the water temperature of the water pump being greater than the temperature threshold, determining the warning demarcation threshold to be the second number, and the second number is less than the first number.

[0049] Optionally, after starting to count the cumulative number of faults, the EMS compares the water temperature of the water pump with a temperature threshold. If the water temperature of the water pump is less than or equal to the temperature threshold, the EMS determines the warning threshold as the first number. If the water temperature of the water pump is greater than the temperature threshold, the EMS determines the warning threshold as the second number. The second number is less than the first number.

[0050] In one possible implementation, the temperature threshold, the first number, and the second number can be set based on experience, and the second number must be smaller than the first number. For example, the temperature threshold can be set to 80 degrees, the first number can be set to four, and the second number can be set to two.

[0051] In step 206 , in response to the fact that the cumulative number of faults does not reach the warning threshold and is greater than 0, the EMS controls the vehicle's fault indicator light to light up.

[0052] For example, after determining the warning threshold, the EMS compares the cumulative number of faults with the warning threshold. If the cumulative number of faults does not reach the warning threshold and is greater than 0, the EMS controls the vehicle's malfunction indicator light to illuminate. Alternatively, the malfunction indicator light can be the MIL on the vehicle's instrument panel, which is used to indicate vehicle malfunctions.

[0053] In one possible implementation, after the fault indicator light is illuminated, the accumulated fault count continues to be counted. In response to the accumulated fault count reaching a warning threshold, the EMS controls the engine to shut down and prohibit starting. For example, if the accumulated fault count reaches the warning threshold, the EMS controls the engine to shut down and prohibit starting, including: the EMS sends an engine start prohibition signal to the HCU, and upon receiving the engine start prohibition signal request, the HCU sends a shutdown command to the EMS, controlling the engine speed to drop to 0.

[0054] Optionally, in response to the engine speed dropping to 0 and lasting for a third period of time, the accumulated number of EMS control faults is restored to the initial value, so that the water temperature status of the engine water pump can be continued to be monitored after the engine is restarted and an early warning of abnormal conditions can be issued.

[0055] For example, the third time period can be set based on experience, for example, 8 seconds. By controlling the fault accumulation count to return to the initial value only after the engine speed drops to 0 for the third time period, a new round of water pump fault statistics is performed only after the engine is completely shut down and the temperature of the engine water pump is completely reduced, thereby avoiding statistical errors.

[0056] In summary, a monitoring logic block diagram of an engine water pump provided in an embodiment of the present application is used as an example for illustration. Among them, the execution subject may be an EMS. Step 401, the ignition switch of the vehicle is powered on. Step 402, the current diagnostic threshold is determined based on the rotational speed of the water pump and the battery voltage. Step 403, determine whether the feedback current of the water pump is greater than the current diagnostic threshold and lasts for a first time period. If the feedback current of the water pump is greater than the current diagnostic threshold and lasts for a first time period, execute step 404; if the feedback current of the water pump is not greater than the current diagnostic threshold or the feedback current of the water pump is greater than the current diagnostic threshold but does not last for the first time period, execute step 402.

[0057] In one possible implementation, in step 404, the EMS adjusts the speed of the water pump to the first target speed and maintains it for a second period of time. In step 405, after the second period of time, the second target speed of the water pump is controlled based on the engine load and the water temperature of the water pump. In step 406, the cumulative number of faults is controlled to increase by one. In step 407, the warning demarcation threshold of the cumulative number of faults is determined based on the water temperature of the water pump. In step 408, it is determined whether the cumulative number of faults has reached the warning demarcation threshold and is less than 0. If the cumulative number of faults has not reached the warning demarcation threshold and is greater than 0, execute step 409; if the cumulative number of faults reaches the warning demarcation threshold, execute step 410. In step 409, the vehicle's fault indicator light is controlled to light up. In step 410, the engine is controlled to stop and the engine is prohibited from starting.

[0058] The embodiment of the present application obtains the battery voltage and the speed of the engine's water pump when the vehicle's ignition switch is powered on, and determines a current diagnostic threshold value based on the water pump's speed and the battery voltage; if the feedback current of the water pump is greater than the current diagnostic threshold value and lasts for a first period of time, the water pump's speed is adjusted to a first target speed and lasts for a second period of time, and the cumulative number of faults is controlled to increase once; then, a warning demarcation threshold value for the cumulative number of faults is determined based on the water temperature of the water pump; if the cumulative number of faults does not reach the warning demarcation threshold value and is greater than 0, the vehicle's fault indicator light is controlled to light up, thereby achieving timely adjustment and warning of abnormal water pump speed, avoiding the problem of engine water temperature overheating, and thus ensuring the safety of the vehicle.

[0059] See also Figure 5 , an embodiment of the present application provides a monitoring device for an engine water pump, the device comprising:

[0060] an acquisition module 501 for acquiring, in response to the vehicle's ignition switch being powered on, a battery voltage, a rotational speed of an engine water pump, a feedback current of the water pump, and a water temperature of the water pump;

[0061] A first determining module 502 is configured to determine a current diagnostic threshold based on a water pump speed and a battery voltage;

[0062] an adjusting module 503 for adjusting a target speed of the water pump to a first target speed for a second time period in response to a feedback current of the water pump being greater than a current diagnostic threshold and lasting for a first time period, wherein the first time period is less than the second time period;

[0063] The first control module 504 is used to control the fault accumulation number to increase by one, and the initial value of the fault accumulation number is 0;

[0064] The second determining module 505 is used for determining the warning threshold value of the cumulative number of faults based on the water temperature of the water pump;

[0065] The second control module 506 is configured to control a fault indicator light of the vehicle to light up in response to the cumulative number of faults not reaching the warning threshold and being greater than 0.

[0066] In a possible implementation, the second control module 506 is further configured to control the engine to shut down and prohibit starting in response to the cumulative number of faults reaching a warning threshold.

[0067] In a possible implementation, the adjustment module 503 is further configured to obtain the engine load after the second period of time; and control the rotation of the water pump based on the engine load and the water temperature of the water pump.

[0068] In a possible implementation, the adjustment module 503 is configured to calculate a second target speed of the water pump based on the engine load and the water temperature of the water pump; and control the rotation of the water pump at the second target speed.

[0069] In one possible implementation, the second determination module 505 is used to determine the warning demarcation threshold as the first number in response to the water temperature of the water pump being less than or equal to the temperature threshold; and to determine the warning demarcation threshold as the second number in response to the water temperature of the water pump being greater than the temperature threshold, and the second number is less than the first number.

[0070] In one possible implementation, the first determination module 502 is used to use the feedback current value corresponding to the water pump speed and the battery voltage in the current diagnosis MAP diagram as the current diagnosis threshold. The current diagnosis MAP diagram includes the correspondence between the water pump speed and the battery voltage and the feedback current of the water pump.

[0071] In a possible implementation, the second control module 506 is further configured to, in response to the engine speed dropping to 0 and lasting for a third period of time, control the accumulated number of faults to return to an initial value.

[0072] This device obtains the battery voltage and the speed of the engine's water pump when the vehicle's ignition switch is powered on, and determines a current diagnosis threshold value based on the water pump's speed and the battery voltage; if the feedback current of the water pump is greater than the current diagnosis threshold value and lasts for a first period of time, the water pump's speed is adjusted to a first target speed and lasts for a second period of time, and the cumulative number of faults is controlled to increase once; then, a warning demarcation threshold value for the cumulative number of faults is determined based on the water temperature of the water pump; if the cumulative number of faults does not reach the warning demarcation threshold value and is greater than 0, the vehicle's fault indicator light is controlled to light up, thereby achieving timely adjustment and warning of abnormal water pump speed, avoiding the problem of overheating of the engine water temperature, and thus ensuring the safety of the vehicle.

[0073] It should be noted that the apparatus provided in the above embodiments is merely illustrated by the division of the above functional modules when implementing its functions. In actual applications, the above functions can be assigned to different functional modules as needed, that is, the internal structure of the device can be divided into different functional modules to complete all or part of the functions described above. In addition, the apparatus and method embodiments provided in the above embodiments are based on the same concept. The specific implementation process is detailed in the method embodiment and will not be repeated here.

[0074] In an exemplary embodiment, a computer-readable storage medium is also provided, in which at least one computer program is stored. The at least one computer program is loaded and executed by a processor of a computer device to enable the computer to implement any of the above-mentioned engine water pump monitoring methods.

[0075] In one possible implementation, the computer-readable storage medium may be a read-only memory (ROM), a random access memory (RAM), a compact disc (CD-ROM), a magnetic tape, a floppy disk, an optical data storage device, and the like.

[0076] In an exemplary embodiment, a computer program product or computer program is also provided. The computer program product or computer program includes computer instructions stored in a computer-readable storage medium. A processor of a computer device reads the computer instructions from the computer-readable storage medium and executes the computer instructions, causing the computer device to perform any of the above-described engine water pump monitoring methods.

[0077] It should be noted that the information (including but not limited to user device information, user personal information, etc.), data (including but not limited to data used for analysis, stored data, displayed data, etc.) and signals involved in this application are all authorized by the user or fully authorized by all parties, and the collection, use and processing of relevant data must comply with the relevant laws, regulations and standards of the relevant countries and regions. For example, the battery voltage, engine water pump speed, water pump feedback current, water pump water temperature, current diagnosis threshold, cumulative number of faults, engine load, first target speed and second target speed involved in this application are all obtained with full authorization.

[0078] It should be understood that the term "plurality" used herein refers to two or more. "And / or" describes a relationship between associated objects, indicating that three possible relationships exist. For example, "A and / or B" can mean: A exists alone, A and B exist simultaneously, or B exists alone. The character " / " generally indicates an "or" relationship between the associated objects.

[0079] It should be noted that the terms "first," "second," etc. (if any) in the specification and claims of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequential order. It should be understood that the numbers used in this way are interchangeable where appropriate so that the embodiments of the application described herein can be implemented in an order other than those illustrated or described herein. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. Instead, they are merely examples of devices and methods consistent with some aspects of the application as detailed in the appended claims.

[0080] The above description is merely an exemplary embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent replacements, improvements, etc. made within the principles of the present application shall be included in the scope of protection of the present application.

Claims

1. A method for monitoring an engine water pump, characterized in that: The method comprises: In response to the vehicle's ignition switch being powered on, obtaining a battery voltage, a rotational speed of a water pump of the engine, a feedback current of the water pump, and a water temperature of the water pump; determining a current diagnosis threshold based on a rotational speed of the water pump and a voltage of the battery; In response to a feedback current of the water pump being greater than the current diagnosis threshold and lasting for a first time period, adjusting the target speed of the water pump to a first target speed and lasting for a second time period, wherein the first time period is less than the second time period; The control fault cumulative number increases by one, and the initial value of the fault cumulative number is 0; Determining a warning threshold for the cumulative number of failures based on the water temperature of the water pump; In response to the accumulated number of faults not reaching the warning threshold and being greater than 0, a fault indicator light of the vehicle is controlled to light up.

2. The method according to claim 1, characterized in that After controlling the vehicle's fault indicator light to light up, the method further includes: In response to the accumulated number of failures reaching the warning boundary threshold, the engine is controlled to be stopped and is prohibited from being started.

3. The method according to claim 1, characterized in that After the target speed of the water pump is adjusted to the first target speed for a second period of time, the method further includes: After the second time period, obtaining the engine load; The water pump is controlled to rotate based on the engine load and a water temperature of the water pump.

4. The method according to claim 3, characterized in that The controlling the rotation of the water pump based on the engine load and the water temperature of the water pump includes: calculating a second target speed of the water pump based on the engine load and the water temperature of the water pump; The water pump is controlled to rotate at the second target speed.

5. The method according to claim 1, wherein The method of determining the warning threshold value of the cumulative number of failures based on the water temperature of the water pump includes: In response to the water temperature of the water pump being less than or equal to a temperature threshold, determining the warning demarcation threshold to be the first number; In response to the water temperature of the water pump being greater than a temperature threshold, the warning demarcation threshold is determined to be the second number of times, and the second number of times is less than the first number of times.

6. The method according to claim 1, characterized in that The determining of the current diagnosis threshold based on the rotational speed of the water pump and the battery voltage includes: The feedback current value corresponding to the water pump speed and the battery voltage in the current diagnosis pulse spectrum MAP diagram is used as the current diagnosis threshold. The current diagnosis MAP diagram includes the correspondence between the water pump speed and the battery voltage and the feedback current of the water pump.

7. The method according to claim 2, characterized in that After controlling the engine to stop and prohibit starting, the method further includes: In response to the engine speed dropping to 0 and lasting for a third period of time, the accumulated number of faults is controlled to be restored to the initial value.

8. A monitoring device for an engine water pump, characterized in that: The device comprises: an acquisition module, configured to acquire, in response to the vehicle's ignition switch being powered on, a battery voltage, a rotational speed of an engine water pump, a feedback current of the water pump, and a water temperature of the water pump; a first determining module, configured to determine a current diagnosis threshold based on a rotational speed of the water pump and a voltage of the battery; an adjustment module, configured to adjust the target speed of the water pump to a first target speed for a second time period in response to a feedback current of the water pump being greater than the current diagnostic threshold and lasting for a first time period, wherein the first time period is less than the second time period; A first control module is used to control the cumulative number of faults to increase by one, wherein the initial value of the cumulative number of faults is 0; A second determining module is used for determining a warning threshold value of the cumulative number of faults based on the water temperature of the water pump; The second control module is configured to control a fault indicator light of the vehicle to light up in response to the accumulated number of faults not reaching the warning threshold and being greater than 0.

9. A computer program product, comprising computer instructions, wherein when the computer instructions are executed by a processor, the steps of the engine water pump monitoring method according to any one of claims 1 to 7 are implemented.

10. A non-transitory computer-readable storage medium, characterized in that The computer-readable storage medium stores a computer program, which is loaded and executed by a processor to implement the engine water pump monitoring method according to any one of claims 1 to 7.

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