Troubleshooting method, electronic device, and vehicle

Abstract

The present application relates to the technical field of electronic water pumps, and provides a troubleshooting method, an electronic device, and a vehicle. The method comprises: acquiring engine operation information and electronic water pump operation information; on the basis of the engine operation information and / or the electronic water pump operation information, determining whether an electronic water pump has a stall fault; and in response to determining the existence of a stall fault, increasing a rotational speed of the electronic water pump to a preset rotational speed, and controlling the electronic water pump to operate at the preset rotational speed. After the current rotational speed of the electronic water pump is increased to the preset rotational speed, a flow rate of the electronic water pump correspondingly increases. By increasing the flow rate of the electronic water pump, the electronic water pump can achieve flushing-based self-recovery, thereby eliminating a stall problem occurring at low rotational speed, and avoiding issues such as burning of the electronic water pump or an increase in engine coolant temperature when the electronic water pump operates at low rotational speed. Meanwhile, increasing the rotational speed of the electronic water pump to achieve flushing-based self-recovery thereof can also reduce the frequency of electronic water pump alarms, thereby effectively reducing the number of manual maintenance operations and improving user satisfaction.

Description

Troubleshooting methods, electronic equipment and vehicles

[0001] This application claims priority to Chinese Patent Application No. 2025100708954, filed on January 16, 2025, entitled "Troubleshooting Method, Electronic Device and Vehicle", the entire contents of which are incorporated herein by reference. Technical Field

[0002] This application relates to the field of electronic water pump technology, and more particularly to a troubleshooting method, electronic equipment, and vehicle. Background Technology

[0003] In the context of energy conservation, emission reduction, and the rapid development of new energy sources, the application of electric water pumps in engines has become increasingly widespread. The speed and power of the electric water pump dynamically change according to the engine's cooling needs. When the engine speed and heat dissipation requirements are relatively low, the electric water pump speed is also relatively low. However, during low-speed operation, the electric water pump may stall. Because the driving torque of the electric water pump is low at low speeds, it cannot automatically disengage and recover, leading to problems such as electric water pump burnout and increased engine water temperature. Technical content

[0004] In view of this, the purpose of this application is to provide a troubleshooting method, electronic equipment and vehicle to solve the problem that the electronic water pump becomes stuck and cannot be automatically cleared when it is running at low speed.

[0005] To achieve the above objectives, the first aspect of this application provides a troubleshooting method, comprising:

[0006] Obtain engine operating information and electronic water pump operating information;

[0007] Determine whether the electronic water pump is stalled based on engine operating information and / or electronic water pump operating information.

[0008] In response to the confirmed presence of a stall fault, the speed of the electronic water pump is increased to the preset speed, and the electronic water pump is controlled to operate at the preset speed.

[0009] The preset speed is the minimum speed at which the electronic water pump can eliminate stall faults by increasing the flow rate of the electronic water pump.

[0010] Increasing the flow rate of the electric water pump allows it to automatically flush and recover, eliminating stalling issues and preventing problems such as water pump burnout or engine overheating when the pump is running at low speeds. Simultaneously, it reduces the frequency of water pump alarms, effectively decreasing the need for manual maintenance and improving user satisfaction.

[0011] Optionally, engine operating information includes engine coolant temperature, and electronic water pump operating information includes the actual speed of the electronic water pump; determining whether the electronic water pump has a stall fault based on the engine operating information and / or electronic water pump operating information includes:

[0012] In response to the determination that the actual speed of the electronic water pump meets the preset abnormal speed conditions and the engine water temperature exceeds the preset upper limit threshold, it is determined that the electronic water pump has a stall fault.

[0013] Among them, the abnormal speed condition is used to determine whether the actual speed of the electronic water pump is abnormal.

[0014] In this embodiment, when the electronic water pump exhibits abnormal speed and the engine coolant temperature exceeds the preset upper limit threshold, it is determined that the electronic water pump has a stall fault. This not only accurately identifies the stall fault but also avoids the problem of misjudging the stall fault.

[0015] Optionally, engine operating information includes engine coolant temperature. Based on the engine operating information and / or electric water pump operating information, it is determined whether the electric water pump has a stall fault, including:

[0016] In response to determining that the engine coolant temperature exceeds a preset upper limit threshold, a stall fault is identified in the electronic water pump. Optionally, the electronic water pump operating information includes the target speed of the electronic water pump;

[0017] Determine if the actual speed of the electric water pump meets the preset abnormal speed conditions, including:

[0018] In response to the difference between the target speed and the actual speed of the electronic water pump being greater than a first preset difference threshold, it is determined that the actual speed of the electronic water pump meets a preset speed abnormality condition; wherein, the target speed of the electronic water pump is determined based on the engine speed, engine load and a first preset relationship; in the first preset relationship, when the engine speed is constant, the target speed of the electronic water pump is positively correlated with the engine load; when the engine load is constant, the target speed of the electronic water pump is positively correlated with the engine speed; the target speed is the required speed of the electronic water pump under normal operating conditions.

[0019] The method described in this embodiment provides a rapid method for determining the target rotational speed. This allows for the rapid determination of whether the electronic water pump has an abnormal rotational speed based on the target rotational speed and the actual rotational speed of the pump. This facilitates the timely detection of pump malfunctions and the rapid elimination of subsequent stall faults.

[0020] Optionally, the electronic water pump operating information includes the target duty cycle of the electronic water pump; determining whether the actual speed of the electronic water pump meets the preset abnormal speed conditions, including:

[0021] In response to the difference between the product of the target duty cycle and the maximum speed of the electronic water pump and the actual speed of the electronic water pump being greater than a first preset difference threshold, it is determined that the actual speed of the electronic water pump meets a preset abnormal speed condition. The target duty cycle of the electronic water pump is determined based on the engine speed, engine load, and a first preset relationship. In the first preset relationship, when the engine speed is constant, the target duty cycle of the electronic water pump is positively correlated with the engine load; when the engine load is constant, the target duty cycle of the electronic water pump is positively correlated with the engine speed. The first preset difference threshold is a critical value used to determine whether the actual speed of the electronic water pump is abnormal.

[0022] Optionally, the engine load can be the relative charge volume rl in the engine cylinder. The relative charge volume rl is calculated as follows:

[0023] ,

[0024] in, Indicates the mass of gas inside the combustion chamber. This indicates the mass of gas inside the combustion chamber under standard conditions. This indicates the gas pressure inside the combustion chamber. This represents the gas pressure under standard conditions. , This represents the air temperature under standard conditions. , This indicates the air temperature before the combustion chamber.

[0025] Optionally, the method also includes:

[0026] Within a preset time period when the electric water pump operates at a preset speed, the engine load is reduced in response to the rate of change of engine water temperature exceeding a preset rate of change threshold.

[0027] The preset duration refers to the fixed time after the electronic water pump reaches the preset speed, which is used to assess the trend of engine water temperature change.

[0028] By reducing the engine load, the problem of rising engine coolant temperature can be solved, achieving a rapid drop in engine coolant temperature and avoiding safety hazards caused by engine overheating.

[0029] Optional measures to reduce engine load include:

[0030] The engine's target load percentage is determined based on the engine coolant temperature and a second preset relationship, and the engine is controlled to operate according to the target load percentage; in the second preset relationship, the engine coolant temperature is positively correlated with the target load percentage.

[0031] In this embodiment, the engine load is controlled to decrease in a gradient according to the engine coolant temperature, thereby achieving the purpose of dynamically adjusting the engine load based on the engine coolant temperature to reduce the engine coolant temperature. This ensures that the engine continues to operate within a safe range and avoids excessive reduction of the engine load, which could cause the vehicle to be unable to drive normally.

[0032] Optionally, after controlling the electronic water pump to operate at a preset speed, the method further includes:

[0033] In response to the real-time acquisition of engine coolant temperature being lower than the preset lower limit threshold, the electronic water pump is controlled to operate at the target speed of the electronic water pump.

[0034] Using the method of this embodiment, after determining that the engine coolant temperature has dropped to the preset lower limit threshold, the electronic water pump resumes normal operation. Adjusting the speed of the electronic water pump to the target speed can reduce the power consumption of the electronic water pump and prevent the engine coolant temperature from being too low.

[0035] Optionally, engine operating information includes engine coolant temperature; the method also includes:

[0036] In response to the engine coolant temperature being within a preset coolant temperature range, the stall impact frequency corresponding to the preset coolant temperature range is determined;

[0037] The electronic water pump is controlled to operate at a preset speed according to the stall impact frequency;

[0038] The preset water temperature range is the engine water temperature range within which the electronic water pump needs to prevent stall impact at the stall impact frequency.

[0039] This embodiment provides a method for preventing or reducing abnormal speed of an electronic water pump. A stall impact strategy can be adopted before the electronic water pump experiences abnormal speed, effectively reducing the probability of subsequent abnormal speed of the electronic water pump, thereby improving user satisfaction.

[0040] Optionally, the preset water temperature range is positively correlated with the stall impact frequency.

[0041] Optionally, the electronic water pump operating information includes the actual speed of the electronic water pump; the method further includes: in response to the actual speed of the electronic water pump being within a preset speed range, determining the stall impact frequency corresponding to the actual speed of the electronic water pump; and controlling the electronic water pump to operate at the preset speed according to the stall impact frequency;

[0042] The preset speed range is the actual speed range of the electronic water pump that the pump needs to perform stall impact at the corresponding stall impact frequency.

[0043] Optionally, the actual rotational speed of the electric water pump is negatively correlated with the stall impact frequency.

[0044] Optionally, the electronic water pump operating information includes the target speed and actual current of the electronic water pump;

[0045] Determine whether the electric water pump has a stall fault based on engine operating information and / or electric water pump operating information, including:

[0046] The target current of the electronic water pump is determined based on the target speed of the electronic water pump and the third preset relationship.

[0047] If the difference between the actual current of the electronic water pump and the target current of the electronic water pump is greater than the second preset difference threshold, it is determined that the electronic water pump has a stall fault.

[0048] This embodiment provides a method for determining whether an electronic water pump has a stall fault based on the pump's current, offering an additional method for identifying stall faults and enriching the criteria for judgment. Furthermore, when determining whether an electronic water pump has a stall fault, different judgment methods can be used for cross-verification to further reduce the probability of misjudgment.

[0049] Based on the same technical concept, a second aspect of this application also provides an electronic device, including a memory, a processor, and a computer program stored in the memory and executable by the processor, wherein the processor implements the method of the first aspect when executing the computer program.

[0050] Based on the same technical concept, a third aspect of this application also provides a vehicle, which includes electronic equipment as described in the second aspect.

[0051] As described above, the troubleshooting method, electronic device, and vehicle provided in this application include acquiring engine operating information and electronic water pump operating information, and determining whether the electronic water pump has a stall fault based on the engine operating information and / or the electronic water pump operating information. If the electronic water pump has a stall fault, it indicates that the electronic water pump is operating abnormally, and both the operating state of the electronic water pump and the operating state of the engine will change. Therefore, based on the electronic water pump operating information and the engine operating information, it is possible to accurately determine whether the electronic water pump has a stall fault. In response to determining that a stall fault exists, the speed of the electronic water pump is increased to a preset speed, and the electronic water pump is controlled to operate at the preset speed. After increasing the current speed of the electronic water pump to the preset speed, the flow rate of the electronic water pump increases accordingly. If the stall fault is caused by the initial component tolerance of the electronic water pump or a decrease in the cleanliness of the water circuit, increasing the flow rate of the electronic water pump can enable the electronic water pump to automatically flush and recover, eliminating the stall problem that occurs at low speeds, and avoiding problems such as electronic water pump burnout or engine water temperature rise when the electronic water pump is operating at low speeds. At the same time, increasing the speed of the electronic water pump enables it to automatically restart and recover, which can also reduce the frequency of electronic water pump alarms, thereby effectively reducing the number of manual maintenance operations and improving user satisfaction. Attached Figure Description

[0052] To more clearly illustrate the technical solutions in this application or related technologies, the drawings used in the description of the embodiments or related technologies will be briefly introduced below. Obviously, the drawings described below are only embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0053] Figure 1 is a flowchart illustrating the troubleshooting method according to an embodiment of this application;

[0054] Figure 2 is a schematic diagram of the fault troubleshooting device according to an embodiment of this application;

[0055] Figure 3 is a schematic diagram of the hardware structure of the electronic device according to an embodiment of this application. Detailed Implementation

[0056] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with specific embodiments and the accompanying drawings.

[0057] It should be noted that, unless otherwise defined, the technical or scientific terms used in the embodiments of this application should have the ordinary meaning understood by one of ordinary skill in the art to which this application pertains. The terms "first," "second," and similar terms used in the embodiments of this application do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed after the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are only used to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0058] In related technologies, the mechanical water pump is powered by a front-end belt or chain. Even if the mechanical water pump experiences slight stalling, the belt or chain will increase torque to pull the pump to rotate, overcoming the stalling problem. The mechanical water pump's speed is affected by the engine speed and cannot be adjusted according to cooling needs. The electronic water pump, on the other hand, is powered by electromagnetic force and controlled by excitation current. The electronic water pump can achieve precise control of coolant flow and temperature. When engine speed and heat dissipation requirements are low, the electronic water pump operates at a lower speed to quickly warm up the engine and reduce heat loss. Due to initial component tolerances and the cleanliness of the water system, the electronic water pump may occasionally stall. However, because of the low speed and low drive torque, the electronic water pump cannot automatically disengage and recover after stalling, leading to problems such as zero speed, burn-out, fault codes, or increased engine coolant temperature, affecting normal vehicle operation.

[0059] In view of this, this application proposes a troubleshooting method. When it is determined that the electronic water pump is stalled based on engine operating information and / or electronic water pump operating information, the electronic water pump speed is increased to a preset speed, and the electronic water pump is controlled to operate at the preset speed. This increases the flow rate of the electronic water pump, enhances the ability of the electronic water pump to self-open and recover, and avoids the problem of electronic water pump failure or engine water temperature rise caused by stalling when the electronic water pump is running at low speed.

[0060] The embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0061] This application proposes a troubleshooting method for an electronic water pump controller, referring to Figure 1, which includes the following steps:

[0062] Step 102: Obtain engine operating information and electronic water pump operating information.

[0063] Specifically, engine operating information refers to data generated by the engine during operation. This information can include engine coolant temperature, engine speed, and engine load. Similarly, electric water pump operating information refers to data generated by the electric water pump during operation. This information can include electric water pump speed, voltage, current, temperature, and water level. Electric water pumps are typically equipped with level or pressure sensors to detect the water source's condition. The sensors transmit the detected signals to the controller. The controller determines the electric water pump's current operating status based on the sensor signals, such as whether the water level has reached a preset value or whether the pressure is too high. Based on the determination, the controller sends corresponding control signals to the electric water pump, including turning it on or off, adjusting its flow rate, pressure, or speed.

[0064] Step 104: Determine whether the electronic water pump has a stall fault based on the engine operating information and / or electronic water pump operating information.

[0065] Specifically, if the electric water pump malfunctions and stalls, the operating status of both the electric water pump and the engine will change. The electric water pump may experience zero speed or a decrease in speed; in severe cases of stalling, it may even burn out. Because of the abnormal operating status of the electric water pump, the engine's cooling efficiency will directly decrease, leading to an increase in engine coolant temperature. Therefore, real-time engine operating information and electric water pump operating information can accurately reflect whether the electric water pump is experiencing a stalling fault.

[0066] Step 106: In response to the determination of a stall fault, increase the speed of the electronic water pump to the preset speed and control the electronic water pump to operate at the preset speed.

[0067] Specifically, a stalled operation refers to a situation where the electric water pump, operating at low speeds, experiences resistance, preventing it from reaching its target speed and leading to overheating of the engine due to poor heat dissipation. Once a stalled operation is confirmed, it needs to be repaired to prevent further disruption to the pump's normal operation. If the pump's speed is currently low, its speed can be increased to a preset speed to improve its self-clearing and recovery capabilities. The preset speed is the minimum speed at which the pump can self-clear and recover from stalling caused by initial component tolerances or water system cleanliness. For example, the preset speed can be the pump's maximum speed. When the pump operates at the preset speed, its drive torque and flow rate increase accordingly, enhancing its ability to overcome stalling and effectively eliminating the stalling problem without manual maintenance. This also reduces the probability of a pump malfunction alarm.

[0068] Based on steps 102 to 106 above, this embodiment provides a troubleshooting method, including acquiring engine operating information and electronic water pump operating information, and determining whether the electronic water pump has a stall fault based on the engine operating information and / or electronic water pump operating information. If the electronic water pump has a stall fault, it indicates that the electronic water pump is operating abnormally, and both the operating state of the electronic water pump and the operating state of the engine will change. Therefore, based on the electronic water pump operating information and engine operating information, it is possible to accurately determine whether the electronic water pump has a stall fault. In response to determining that a stall fault exists, the speed of the electronic water pump is increased to a preset speed, and the electronic water pump is controlled to operate at the preset speed. After increasing the current speed of the electronic water pump to the preset speed, the flow rate of the electronic water pump increases accordingly. If the stall fault is caused by reasons such as the initial component tolerance of the electronic water pump or the reduced cleanliness of the water circuit, increasing the flow rate of the electronic water pump can enable the electronic water pump to automatically flush and recover, eliminating the stall problem that occurs at low speeds, and avoiding problems such as electronic water pump burnout or engine water temperature rise when the electronic water pump is operating at low speeds. At the same time, increasing the speed of the electronic water pump enables it to automatically restart and recover, which can also reduce the frequency of electronic water pump alarms, thereby effectively reducing the number of manual maintenance operations and improving user satisfaction.

[0069] The following describes a method for determining whether an electronic water pump has a stall fault through specific embodiments.

[0070] In some embodiments, engine operating information includes engine coolant temperature, and electronic water pump operating information includes the actual rotational speed of the electronic water pump; determining whether the electronic water pump has a stall fault based on the engine operating information and / or the electronic water pump operating information includes:

[0071] In response to the determination that the actual speed of the electronic water pump meets the preset abnormal speed conditions and the engine water temperature exceeds the preset upper limit threshold, it is determined that the electronic water pump has a stall fault.

[0072] Specifically, if the electric water pump experiences a stall, its rotational speed will become abnormal. To avoid misjudgments of abnormal speed caused by fluctuations in the detection signal, this embodiment pre-sets abnormal speed conditions. These conditions accurately determine whether the electric water pump's speed is abnormal. If an abnormal speed is detected, and simultaneously the engine coolant temperature rises above the upper temperature threshold, it indicates that the electric water pump malfunction is causing reduced engine cooling efficiency, thus confirming a stall in the electric water pump. The upper temperature threshold is slightly lower than the engine's maximum equilibrium coolant temperature. For example, if the engine's maximum equilibrium coolant temperature is 115°C, the upper temperature threshold could be 102°C. A reasonable upper temperature threshold allows for troubleshooting measures to be taken before the engine coolant temperature reaches its maximum equilibrium temperature, clearing the stalled electric water pump, restoring its cooling capacity, and preventing damage to both the pump and the engine. In this embodiment, a stall is confirmed when the electric water pump's rotational speed is abnormal and the engine coolant temperature exceeds the preset upper temperature threshold. This not only accurately identifies the stall but also avoids misjudgments of the stall.

[0073] It should be noted that if the electric water pump is not equipped with a speed sensor and its actual speed cannot be detected, the engine coolant temperature alone can be used to determine if the electric water pump is stalled. Specifically, if the engine coolant temperature exceeds a preset upper limit threshold, the electric water pump is confirmed to be stalled. However, since many factors can cause engine coolant temperature to rise, determining the presence of a stalled electric water pump solely based on engine coolant temperature may not be accurate. Therefore, when the actual speed of the electric water pump can be detected, it is preferable to combine the actual speed of the electric water pump with the engine coolant temperature to determine if a stalled electric water pump is present. This effectively avoids the problem of misdiagnosing engine stall.

[0074] Based on the foregoing embodiments, the following specific embodiments describe a method for determining whether the actual speed of an electronic water pump meets the preset abnormal speed conditions.

[0075] In some embodiments, the electronic water pump operating information includes the target speed of the electronic water pump;

[0076] Determine if the actual speed of the electric water pump meets the preset abnormal speed conditions, including:

[0077] In response to the difference between the target speed and the actual speed of the electronic water pump being greater than a first preset difference threshold, it is determined that the actual speed of the electronic water pump meets a preset speed abnormality condition; wherein, the target speed of the electronic water pump is determined based on the engine speed, engine load and a first preset relationship; in the first preset relationship, when the engine speed is constant, the target speed of the electronic water pump is positively correlated with the engine load; when the engine load is constant, the target speed of the electronic water pump is positively correlated with the engine speed.

[0078] Specifically, the engine controller sends the target speed to the electronic water pump controller, which then controls the electronic water pump to operate at the target speed. However, due to external factors, the actual speed of the electronic water pump may not equal the target speed, resulting in fluctuations. Within the normal fluctuation range of speed, the difference between the target speed and the actual speed of the electronic water pump is small, and the electronic water pump can be considered to be operating normally. However, when the difference between the target speed and the actual speed of the electronic water pump exceeds a first preset difference threshold, it indicates that the difference between the actual speed and the target speed is large and does not fall within the normal speed fluctuation range. In this case, the actual speed of the electronic water pump is determined to meet a preset speed anomaly condition. For example, the actual speed of the electronic water pump is denoted as n2, and the target speed is denoted as n1. If n1 - n2 > 10 rpm, then the actual speed of the electronic water pump is determined to meet the preset speed anomaly condition, where the first preset difference threshold is 10 rpm.

[0079] Because the speed of the electric water pump dynamically changes according to the engine's cooling requirements, its target speed also changes dynamically. The engine controller determines the target speed based on the engine speed, engine load, and a first preset relationship, and then sends the target speed to the electric water pump controller. In practice, the first preset relationship defines the correspondence between engine speed, engine load, and the target speed of the electric water pump. Once the engine speed and engine load are determined, a unique target speed can be matched within the first preset relationship. The target speed is the required speed of the electric water pump under normal operating conditions.

[0080] When the engine speed is constant, the target speed is positively correlated with the engine load; that is, the higher the engine load, the higher the target speed. A higher engine load also means a greater demand for engine cooling, thus leading to a higher target speed.

[0081] Furthermore, the first preset relationship can also define the correspondence between engine speed, engine load, and the target duty cycle of the electric water pump. Once the engine speed and engine load are determined, a unique target duty cycle can be matched within the first preset relationship. The target duty cycle is the duty cycle of the electric water pump under normal operating conditions. When the engine speed is constant, the target duty cycle is positively correlated with the engine load; that is, the higher the engine load, the larger the target duty cycle. A higher engine load means a greater demand for engine cooling; therefore, a larger target duty cycle results in a faster electric water pump speed. After finding the target duty cycle, the product of the electric water pump's maximum speed and the target duty cycle is the target speed of the electric water pump.

[0082] For example, the engine load can be the relative volume of air (rl) in the engine cylinder, and the relative volume of air (rl) is calculated as follows:

[0083] ,

[0084] in, Indicates the mass of gas inside the combustion chamber. This indicates the mass of gas inside the combustion chamber under standard conditions. This indicates the gas pressure inside the combustion chamber. This represents the gas pressure under standard conditions. , This represents the air temperature under standard conditions. , This indicates the air temperature before the combustion chamber.

[0085] The method described in this embodiment provides a rapid method for determining the target rotational speed. This allows for the rapid determination of whether the electronic water pump has an abnormal rotational speed based on the target rotational speed and the actual rotational speed of the pump. This facilitates the timely detection of pump malfunctions and the rapid elimination of subsequent stall faults.

[0086] In addition to determining whether the electronic water pump is stalled by measuring the actual speed of the electronic water pump and the engine temperature, the electronic water pump current can also be used to determine whether the electronic water pump is stalled. This will be explained in detail below with specific examples.

[0087] In some embodiments, the electronic water pump operating information includes the target speed of the electronic water pump and the actual current of the electronic water pump;

[0088] Determine whether the electric water pump has a stall fault based on engine operating information and / or electric water pump operating information, including:

[0089] The target current of the electronic water pump is determined based on the target speed of the electronic water pump and the third preset relationship.

[0090] If the difference between the actual current of the electronic water pump and the target current of the electronic water pump is greater than the second preset difference threshold, it is determined that the electronic water pump has a stall fault.

[0091] Specifically, an electric water pump generates a corresponding current when operating at a certain speed. An abnormal current in the electric water pump can, to some extent, reflect an abnormal pump speed. When the electric water pump stalls, the current will increase. To facilitate querying the target current corresponding to the target speed, the correspondence between the target speed and the target current of the electric water pump can be pre-defined in the third preset relationship. Generally speaking, when the load on the electric water pump is constant, the target current increases with the increase of the target speed.

[0092] The target speed and actual current of the electric water pump are determined. Based on the target speed, the target current is determined by querying a third preset relationship. The actual current of the electric water pump is compared with the target current. If the difference between the actual current and the target current is greater than a second preset difference threshold, it indicates a large gap between the actual current and the target current, and the electric water pump current shows an abnormally increasing trend, confirming that the electric water pump has a stall fault. The second preset difference threshold can be determined based on the rated power of the electric water pump and actual needs; no specific limitation is imposed in this embodiment. This embodiment provides a method for determining whether an electric water pump has a stall fault based on the electric water pump current. Compared with the previous embodiment that determined the stall fault based on the actual speed of the electric water pump and the engine coolant temperature, this embodiment provides an additional judgment method for determining the stall fault, enriching the judgment criteria for stall faults. In addition, when judging whether an electric water pump has a stall fault, different judgment methods can be used for cross-verification to further reduce the probability of misjudgment.

[0093] After controlling the electronic water pump to operate at a preset speed, it is necessary to continue monitoring whether the engine's heat dissipation effect has improved. If it has not improved, further cooling measures need to be taken to ensure that the engine is not damaged. The following is an explanation through specific embodiments.

[0094] In some embodiments, the method further includes:

[0095] Within a preset time period when the electronic water pump operates at a preset speed, the engine load is reduced in response to the rate of change of engine water temperature exceeding a preset rate of change threshold.

[0096] Specifically, the preset duration refers to a fixed period set for the electronic water pump to observe and evaluate the engine coolant temperature change trend after it reaches a preset speed. After increasing the electronic water pump speed from the current speed to the preset speed, the pump operates for the preset duration. Within this preset duration, if the engine coolant temperature change rate is greater than a preset change rate threshold, it indicates that the engine coolant temperature is gradually rising. The preset change rate threshold is a value greater than zero, such as 0.5. The preset duration could be 5 seconds. If the engine coolant temperature gradually rises, it means that the electronic water pump's heat dissipation effect has not improved, and simply increasing the pump speed cannot solve the engine overheating problem. In this case, to protect the engine, it is necessary to further reduce the engine load to address the rising engine coolant temperature, achieving a rapid decrease in engine coolant temperature and preventing overheating and potential safety hazards.

[0097] Furthermore, reducing engine load includes:

[0098] The engine's target load percentage is determined based on the engine coolant temperature and a second preset relationship, and the engine is controlled to operate according to the target load percentage; in the second preset relationship, the engine coolant temperature is positively correlated with the target load percentage.

[0099] Specifically, when reducing engine load, the engine load is adjusted based on the real-time engine coolant temperature. The second preset relationship defines the correspondence between engine coolant temperature and the target load limit percentage. The target load limit percentage characterizes the engine load limitation. For example, if the target load limit percentage is 20%, it means the engine load is limited to 20% of the maximum load, and the upper limit of the engine load is adjusted to 80% of the maximum load, which also means the upper limit of the engine's output torque is 80% of the maximum output torque. The higher the engine coolant temperature, the greater the engine's cooling demand, and therefore the higher the target load limit percentage. Table 1 below shows the calibration values ​​in the second preset relationship. When the engine coolant temperature is 114°C, the target load limit percentage is 0%. As the engine coolant temperature gradually increases, the target load limit percentage gradually increases. When the engine coolant temperature reaches 120°C, the target load limit percentage increases to 70%. In this embodiment, based on the engine coolant temperature, the upper limit of the engine load is controlled to decrease in a gradient, achieving dynamic adjustment of the upper limit of the engine load according to the engine coolant temperature to reduce the engine coolant temperature, maintaining engine operation within a safe range, and avoiding excessive reduction of the engine load upper limit that could cause the vehicle to malfunction.

[0100] Table 1 Second Preset Relationship

[0101]

[0102] It should be noted that when adjusting the target limit load percentage, the instrument panel malfunction indicator light can also be illuminated to alert the user that the electronic water pump is malfunctioning and requires timely maintenance to avoid causing vehicle safety issues.

[0103] If the engine coolant temperature drops after the electric water pump has been running at a preset speed, the electric water pump can be restored to its normal operating speed. This will be explained in detail below with specific examples.

[0104] In some embodiments, after controlling the electronic water pump to operate at a preset speed, the method further includes: in response to the real-time acquired engine water temperature being lower than a preset lower water temperature threshold, controlling the electronic water pump to operate at a target speed.

[0105] Specifically, if the engine coolant temperature drops below the preset lower limit after the electric water pump operates at the preset speed, it indicates that the electric water pump's heat dissipation effect has improved, effectively eliminating the stall fault. To keep the engine coolant temperature within a reasonable range and avoid excessively low engine temperature, the electric water pump speed needs to be adjusted from the preset speed to the target speed.

[0106] The target speed is the required speed of the electric water pump under normal operating conditions. The target speed is determined by the engine controller based on engine speed, engine load, and a first preset relationship. This first preset relationship defines the correspondence between engine speed, engine load, and the target speed of the electric water pump. In this first preset relationship, when the engine speed is constant, the target speed of the electric water pump is positively correlated with the engine load. When the engine load is constant, the target speed of the electric water pump is positively correlated with the engine speed.

[0107] Using the method of this embodiment, after determining that the engine coolant temperature has dropped to the preset lower limit threshold, the electronic water pump resumes normal operation. Adjusting the speed of the electronic water pump to the target speed can reduce the power consumption of the electronic water pump and prevent the engine coolant temperature from being too low.

[0108] The aforementioned embodiments are all corresponding measures taken when the speed of the electronic water pump is determined to be abnormal. This application also proposes a method to take a stall impact strategy in advance when the speed of the electronic water pump is not abnormal, so as to avoid or reduce the probability of the electronic water pump experiencing abnormal speed. The following is a description through specific embodiments.

[0109] In some embodiments, engine operating information includes engine coolant temperature; the method further includes:

[0110] In response to the engine coolant temperature being within a preset coolant temperature range, the stall impact frequency corresponding to the preset coolant temperature range is determined;

[0111] The electronic water pump is controlled to operate at a preset speed according to the stall impact frequency.

[0112] Specifically, to prevent abnormal engine speed of the electric water pump due to initial component tolerances or decreased circuit cleanliness, the engine coolant temperature can be monitored in real time. If the engine coolant temperature is within a preset range, the electric water pump can be controlled to operate at a preset speed with a certain stall impact frequency to reduce the probability of the engine coolant temperature gradually rising. The preset coolant temperature range is the range of engine coolant temperatures within which the electric water pump needs to prevent stall impact at the stall impact frequency. In practice, the correspondence between the coolant temperature range and the stall impact frequency can be pre-defined. For example, when the coolant temperature range is 100℃~102℃, the corresponding stall impact frequency is 1 time / 30min, and the stall impact duration can be 60s. That is, when the engine coolant temperature is detected to be between 100℃ and 102℃, the electric water pump speed is increased to the preset speed every 30 minutes and maintained for 60 seconds to eliminate the potential for electric water pump stall. Afterward, the electric water pump speed is adjusted to the target speed. As the water temperature range increases, the corresponding stall impact frequency gradually increases. For example, when the water temperature range is 105℃~107℃, the corresponding stall impact frequency is adjusted to 1 time / 20min.

[0113] In another specific embodiment, considering that the electric water pump is prone to stalling at low speeds, the stall impact frequency can be determined based on the pump's rotational speed. In response to the electric water pump's actual rotational speed falling within a preset speed range, the stall impact frequency corresponding to this preset speed range is determined, and the electric water pump is controlled to operate at the preset speed according to this stall impact frequency to reduce the probability of a gradual increase in engine coolant temperature. The preset speed range is the actual rotational speed interval of the electric water pump within which it needs to perform stall impacts at the corresponding stall impact frequency.

[0114] In practical implementation, the correspondence between the speed range and the stall impact frequency can be pre-defined. For example, when the speed range is 500 rpm to 1000 rpm, the corresponding stall impact frequency is once every 20 minutes, and the stall impact duration can be 60 seconds. That is, when the electric water pump speed is monitored to be between 500 rpm and 1000 rpm, the electric water pump speed is increased to the preset speed every 20 minutes and maintained for 60 seconds to eliminate the potential for stalling. Afterward, the electric water pump speed is restored to the target speed. As the electric water pump speed increases, the corresponding stall impact frequency gradually decreases. For example, when the speed range is 1001 rpm to 1500 rpm, the corresponding stall impact frequency is adjusted to once every 30 minutes. That is, when the electric water pump speed is monitored to be between 1001 rpm and 1500 rpm, the electric water pump speed is increased to the preset speed every 30 minutes and maintained for 60 seconds to eliminate the potential for stalling. Afterward, the electric water pump speed is restored to the target speed.

[0115] This embodiment provides a method for preventing or reducing abnormal speed of an electronic water pump. A stall impact strategy can be adopted before the electronic water pump experiences abnormal speed, effectively reducing the probability of subsequent abnormal speed of the electronic water pump, thereby improving user satisfaction.

[0116] It should be noted that the method in this embodiment can be executed by a single device, such as a computer or server. The method can also be applied in a distributed scenario, where multiple devices cooperate to complete the task. In such a distributed scenario, one of these devices may execute only one or more steps of the method in this embodiment, and the multiple devices will interact with each other to complete the described method.

[0117] It should be noted that the above description describes some embodiments of this application. Other embodiments are within the scope of the appended claims. In some cases, the actions or steps recorded in the claims can be performed in a different order than that shown in the above embodiments and still achieve the desired result. Furthermore, the processes depicted in the drawings do not necessarily require a specific or sequential order to achieve the desired result. In some embodiments, multitasking and parallel processing are also possible or may be advantageous.

[0118] Based on the same technical concept, corresponding to any of the above embodiments, this application also provides a troubleshooting device.

[0119] Referring to Figure 2, the troubleshooting device includes a processor, wherein the processor is configured to execute the following program modules stored in a memory:

[0120] The acquisition module 202 is configured to acquire engine operating information and electronic water pump operating information;

[0121] Module 204 is configured to determine whether there is a stall fault in the electronic water pump based on engine operating information and / or electronic water pump operating information.

[0122] The control module 206 is configured to, in response to determining that a stall fault exists, increase the speed of the electric water pump to a preset speed and control the electric water pump to operate at the preset speed;

[0123] The preset speed is the minimum speed at which the electronic water pump can eliminate stall faults by increasing the flow rate of the electronic water pump.

[0124] In some embodiments, engine operating information includes engine coolant temperature, and electronic water pump operating information includes actual electronic water pump speed; the determining module 204 is configured to determine that the electronic water pump has a stall fault in response to determining that the actual speed of the electronic water pump meets a preset abnormal speed condition and the engine coolant temperature exceeds a preset upper limit threshold; wherein, the abnormal speed condition is a condition used to determine whether the actual speed of the electronic water pump is abnormal.

[0125] In some embodiments, the determining module 204 is configured to determine whether the electric water pump has a stall fault based on engine operating information including engine coolant temperature and / or electric water pump operating information, including:

[0126] In response to the determination that the engine coolant temperature exceeds the preset upper limit threshold, it is determined that the electronic water pump has a stall fault.

[0127] In some embodiments, the electronic water pump operating information includes the electronic water pump target speed; the determining module 204 is configured to determine that the electronic water pump actual speed meets a preset speed abnormality condition in response to the difference between the electronic water pump target speed and the electronic water pump actual speed being greater than a first preset difference threshold; wherein, the electronic water pump target speed is determined based on the engine speed, engine load, and a first preset relationship; in the first preset relationship, when the engine speed is constant, the electronic water pump target speed is positively correlated with the engine load; when the engine load is constant, the electronic water pump target speed is positively correlated with the engine speed; the target speed is the required speed of the electronic water pump under normal operating conditions.

[0128] In some embodiments, the electric water pump operating information includes the electric water pump target duty cycle; the determining module 204 is configured to determine that the actual speed of the electric water pump meets a preset speed abnormality condition in response to the difference between the product of the electric water pump target duty cycle and the maximum speed of the electric water pump and the actual speed of the electric water pump being greater than a first preset difference threshold; wherein, the electric water pump target duty cycle is determined based on the engine speed, the engine load and a first preset relationship; in the first preset relationship, when the engine speed is constant, the electric water pump target duty cycle is positively correlated with the engine load; when the engine load is constant, the electric water pump target duty cycle is positively correlated with the engine speed; the first preset difference threshold is a critical value used to determine whether the actual speed of the electric water pump is abnormal.

[0129] In some embodiments, the engine load can be the relative charge volume rl in the engine cylinder, and the relative charge volume rl is calculated as follows:

[0130]

[0131] in, Indicates the mass of gas inside the combustion chamber. This indicates the mass of gas inside the combustion chamber under standard conditions. This indicates the gas pressure inside the combustion chamber. This represents the gas pressure under standard conditions. , This represents the air temperature under standard conditions. , This indicates the air temperature before the combustion chamber.

[0132] In some embodiments, the control module 206 is further configured to reduce the engine load in response to the engine coolant temperature change rate being greater than a preset change rate threshold within a preset time period during which the electronic water pump operates at a preset speed; wherein the preset time period refers to a fixed time period set for evaluating the engine coolant temperature change trend after the electronic water pump is increased to a preset speed.

[0133] In some embodiments, the control module 206 is further configured to determine the target limit load percentage of the engine based on the engine coolant temperature and a second preset relationship, and control the engine to operate according to the target limit load percentage; in the second preset relationship, the engine coolant temperature is positively correlated with the target limit load percentage.

[0134] In some embodiments, after controlling the electronic water pump to operate at a preset speed, the control module 206 is further configured to control the electronic water pump to operate at the target speed of the electronic water pump in response to the real-time acquisition of an engine water temperature that is lower than a preset lower water temperature threshold.

[0135] In some embodiments, engine operating information includes engine coolant temperature; the control module 206 is further configured to, in response to the engine coolant temperature being within a preset coolant temperature range, determine the stall impact frequency corresponding to the preset coolant temperature range; and control the electronic water pump to operate at a preset speed according to the stall impact frequency; wherein, the preset coolant temperature range is the engine coolant temperature range within which the electronic water pump needs to prevent stall impact at the stall impact frequency.

[0136] In some embodiments, the preset water temperature range is positively correlated with the stall impact frequency.

[0137] In some embodiments, the electronic water pump operating information includes the actual speed of the electronic water pump; the control module 206 is further configured to determine the stall impact frequency corresponding to the actual speed of the electronic water pump in response to the actual speed of the electronic water pump being within a preset speed range; and to control the electronic water pump to operate at a preset speed according to the stall impact frequency; wherein, the preset speed range is the range of the actual speed of the electronic water pump in which the electronic water pump needs to perform stall impact at the corresponding stall impact frequency.

[0138] In some embodiments, the actual rotational speed of the electric water pump is negatively correlated with the stall impact frequency.

[0139] In some embodiments, the electric water pump operating information includes the electric water pump target speed and the electric water pump actual current; the determining module 204 is further configured to determine the electric water pump target current based on the electric water pump target speed and a third preset relationship; and in response to the difference between the electric water pump actual current and the electric water pump target current being greater than a second preset difference threshold, it is determined that the electric water pump has a stall fault.

[0140] For ease of description, the above devices are described in terms of function, divided into various modules. Of course, in implementing this application, the functions of each module can be implemented in one or more software and / or hardware.

[0141] The apparatus of the above embodiments is used to implement the corresponding troubleshooting method in any of the foregoing embodiments, and has the beneficial effects of the corresponding method embodiments, which will not be repeated here.

[0142] Based on the same technical concept, corresponding to any of the above embodiments, this application also provides an electronic device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the program to implement the troubleshooting method of any of the above embodiments.

[0143] Figure 3 shows a more specific hardware structure diagram of an electronic device provided in this embodiment. The device may include: a processor 1010, a memory 1020, an input / output interface 1030, a communication interface 1040, and a bus 1050. The processor 1010, memory 1020, input / output interface 1030, and communication interface 1040 are interconnected internally via the bus 1050.

[0144] The processor 1010 can be implemented using a general-purpose CPU (Central Processing Unit), microprocessor, application-specific integrated circuit (ASIC), or one or more integrated circuits, and is used to execute relevant programs to implement the technical solutions provided in the embodiments of this specification.

[0145] The memory 1020 can be implemented in the form of ROM (Read Only Memory), RAM (Random Access Memory), static storage device, dynamic storage device, etc. The memory 1020 can store the operating system and other applications. When the technical solutions provided in the embodiments of this specification are implemented by software or firmware, the relevant program code is stored in the memory 1020 and is called and executed by the processor 1010.

[0146] The input / output interface 1030 is used to connect input / output modules to realize information input and output. Input / output modules can be configured as components within the device (not shown in the figure) or externally connected to the device to provide corresponding functions. Input devices may include keyboards, mice, touchscreens, microphones, various sensors, etc., while output devices may include displays, speakers, vibrators, indicator lights, etc.

[0147] The communication interface 1040 is used to connect a communication module (not shown in the figure) to enable communication between this device and other devices. The communication module can communicate via wired means (such as USB, Ethernet cable, etc.) or wireless means (such as mobile network, WIFI, Bluetooth, etc.).

[0148] Bus 1050 includes a pathway for transmitting information between various components of the device, such as processor 1010, memory 1020, input / output interface 1030, and communication interface 1040.

[0149] It should be noted that although the above-described device only shows the processor 1010, memory 1020, input / output interface 1030, communication interface 1040, and bus 1050, in specific implementations, the device may also include other components necessary for normal operation. Furthermore, those skilled in the art will understand that the above-described device may only include the components necessary for implementing the embodiments of this specification, and not necessarily all the components shown in the figures.

[0150] The electronic devices described above are used to implement the corresponding troubleshooting methods in any of the foregoing embodiments and have the beneficial effects of the corresponding method embodiments, which will not be repeated here.

[0151] Based on the same technical concept, corresponding to the methods of any of the above embodiments, this application also provides a non-transitory computer-readable storage medium that stores computer instructions for causing a computer to execute the troubleshooting method of any of the above embodiments.

[0152] The computer-readable medium of this embodiment includes permanent and non-permanent, removable and non-removable media, and information storage can be implemented by any method or technology. Information can be computer-readable instructions, data structures, program modules, or other data. Examples of computer storage media include, but are not limited to, phase-change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technologies, CD-ROM, digital versatile optical disc (DVD) or other optical storage, magnetic tape, magnetic magnetic disk storage or other magnetic storage devices, or any other non-transfer medium that can be used to store information accessible by a computing device.

[0153] The computer instructions stored in the storage medium of the above embodiments are used to cause the computer to execute the troubleshooting method of any of the above embodiments, and have the beneficial effects of the corresponding method embodiments, which will not be repeated here.

[0154] Based on the same concept, corresponding to any of the above embodiments, this application also provides a computer program product, including computer program instructions. When the computer program instructions are run on a computer, they cause the computer to perform the method as described in any of the above embodiments, and have the beneficial effects of the corresponding method embodiments, which will not be repeated here.

[0155] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of this application is limited to these examples; under the concept of this application, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of different aspects of the embodiments of this application as described above, which are not provided in detail for the sake of brevity.

[0156] Additionally, to simplify the description and discussion, and to avoid obscuring the embodiments of this application, the well-known power / ground connections to integrated circuit (IC) chips and other components may or may not be shown in the provided drawings. Furthermore, the apparatus may be shown in block diagram form to avoid obscuring the embodiments of this application, and this also takes into account the fact that the details of the implementation of these block diagram apparatuses are highly dependent on the platform on which the embodiments of this application will be implemented (i.e., these details should be fully understood by those skilled in the art). While specific details (e.g., circuits) have been set forth to describe exemplary embodiments of this application, it will be apparent to those skilled in the art that the embodiments of this application can be implemented without these specific details or with variations thereof. Therefore, these descriptions should be considered illustrative rather than restrictive.

[0157] Although this application has been described in conjunction with specific embodiments thereof, many substitutions, modifications, and variations of these embodiments will be apparent to those skilled in the art from the foregoing description. For example, other memory architectures (e.g., dynamic RAM (DRAM)) may be used with the embodiments discussed.

[0158] The embodiments of this application are intended to cover all such substitutions, modifications, and variations that fall within the broad scope of this application. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the embodiments of this application should be included within the protection scope of this application.

Claims

1. A troubleshooting method, wherein, include: Obtain engine operating information and electronic water pump operating information; Determine whether the electronic water pump has a stall fault based on the engine operating information and / or the electronic water pump operating information; In response to the determination of a stall fault, the speed of the electronic water pump is increased to a preset speed, and the electronic water pump is controlled to operate at the preset speed; The preset speed is the minimum speed at which the electronic water pump can eliminate stall faults by increasing the flow rate of the electronic water pump.

2. The method according to claim 1, wherein, The engine operating information includes the engine coolant temperature, and the electronic water pump operating information includes the actual speed of the electronic water pump. The step of determining whether the electronic water pump has a stall fault based on the engine operating information and / or the electronic water pump operating information includes: In response to determining that the actual speed of the electronic water pump meets the preset abnormal speed conditions and the engine water temperature exceeds the preset upper limit threshold, it is determined that the electronic water pump has a stall fault. Among them, the abnormal speed condition is used to determine whether the actual speed of the electronic water pump is abnormal.

3. The method according to claim 1, wherein, The engine operating information includes engine coolant temperature. Determining whether the electronic water pump has a stall fault based on the engine operating information and / or the electronic water pump operating information includes: In response to the determination that the engine coolant temperature exceeds the preset upper limit threshold, it is determined that the electronic water pump has a stall fault.

4. The method according to claim 2, wherein, The electronic water pump operating information includes the target speed of the electronic water pump; The determination that the actual speed of the electronic water pump meets the preset abnormal speed conditions includes: In response to the difference between the target speed and the actual speed of the electronic water pump being greater than a first preset difference threshold, it is determined that the actual speed of the electronic water pump meets a preset speed anomaly condition; wherein, the target speed of the electronic water pump is determined based on the engine speed, engine load, and a first preset relationship; in the first preset relationship, when the engine speed is constant, the target speed of the electronic water pump is positively correlated with the engine load; when the engine load is constant, the target speed of the electronic water pump is positively correlated with the engine speed; the target speed is the required speed of the electronic water pump under normal operating conditions.

5. The method according to claim 2, wherein, The electronic water pump operating information includes the target duty cycle of the electronic water pump; The determination that the actual speed of the electronic water pump meets the preset abnormal speed conditions includes: In response to a situation where the difference between the product of the target duty cycle and the maximum speed of the electronic water pump and the actual speed of the electronic water pump is greater than a first preset difference threshold, it is determined that the actual speed of the electronic water pump meets a preset speed anomaly condition. The target duty cycle of the electronic water pump is determined based on engine speed, engine load, and a first preset relationship. In the first preset relationship, when the engine speed is constant, the target duty cycle of the electronic water pump is positively correlated with the engine load; when the engine load is constant, the target duty cycle of the electronic water pump is positively correlated with the engine speed. The first preset difference threshold is a critical value used to determine whether the actual speed of the electronic water pump is abnormal.

6. The method according to claim 4 or 5, wherein, Engine load can be represented by the relative volume of air (rl) in the engine cylinders. The relative volume of air (rl) is calculated as follows: ， in, Indicates the mass of gas inside the combustion chamber. This indicates the mass of gas inside the combustion chamber under standard conditions. This indicates the gas pressure inside the combustion chamber. This represents the gas pressure under standard conditions. ， This represents the air temperature under standard conditions. ， This indicates the air temperature before the combustion chamber.

7. The method according to claim 2, wherein, The method further includes: Within a preset time period during which the electronic water pump operates at the preset speed, the engine load is reduced in response to the rate of change of the engine water temperature being greater than a preset rate of change threshold. The preset duration refers to the fixed time after the electronic water pump reaches the preset speed, which is used to assess the trend of engine water temperature change.

8. The method according to claim 7, wherein, The reduction of engine load includes: The engine's target load percentage is determined based on the engine coolant temperature and a second preset relationship, and the engine is controlled to operate according to the target load percentage; in the second preset relationship, the engine coolant temperature is positively correlated with the target load percentage.

9. The method according to claim 4, wherein, After controlling the electronic water pump to operate at the preset speed, the method further includes: In response to the real-time acquisition of engine coolant temperature being lower than a preset lower limit threshold, the electronic water pump is controlled to operate at the target speed of the electronic water pump.

10. The method according to claim 1, wherein, The engine operating information includes engine coolant temperature; the method further includes: In response to the engine coolant temperature being within a preset coolant temperature range, the stall impact frequency corresponding to the preset coolant temperature range is determined; The electronic water pump is controlled to operate at the preset speed according to the stall impact frequency; The preset water temperature range is the engine water temperature range at which the electronic water pump needs to prevent stall impact at the stall impact frequency, and the preset water temperature range is positively correlated with the stall impact frequency.

11. The method according to claim 1, wherein, The electronic water pump operating information includes the actual rotational speed of the electronic water pump; the method further includes: In response to the fact that the actual speed of the electronic water pump is within a preset speed range, the stall impact frequency corresponding to the actual speed of the electronic water pump is determined. The electronic water pump is controlled to operate at the preset speed according to the stall impact frequency; The preset speed range is the actual speed range of the electronic water pump that the pump needs to perform stall impact at the corresponding stall impact frequency.

12. The method according to claim 11, wherein, The actual rotational speed of the electronic water pump is negatively correlated with the stall impact frequency.

13. The method according to claim 1, wherein, The electronic water pump operating information includes the target speed and actual current of the electronic water pump. The step of determining whether the electronic water pump has a stall fault based on the engine operating information and / or the electronic water pump operating information includes: The target current of the electronic water pump is determined based on the target speed of the electronic water pump and the third preset relationship; If the difference between the actual current of the electronic water pump and the target current of the electronic water pump is greater than a second preset difference threshold, it is determined that the electronic water pump has a stall fault.

14. An electronic device comprising a memory, a processor, and a computer program stored in the memory and running on the processor, wherein, When the processor executes the program, it implements the method as described in any one of claims 1 to 13.

15. A vehicle, wherein, The vehicle includes the electronic equipment as described in claim 14.

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