Fault removal method, electronic equipment and vehicle

Abstract

The invention provides a fault removal method, electronic equipment and a vehicle, and the method comprises the steps: obtaining the operation information of an engine and the operation information of an electronic water pump, and determining whether the electronic water pump has a locked-rotor fault or not according to the operation information of the engine and / or the operation information of the electronic water pump. And in response to the locked-rotor fault, increasing the rotating speed of the electronic water pump to a preset rotating speed, and controlling the electronic water pump to operate at the preset rotating speed. After the current rotating speed of the electronic water pump is increased to the preset rotating speed, the flow of the electronic water pump is correspondingly increased. The electronic water pump can be automatically opened and recovered by increasing the flow of the electronic water pump, the locked-rotor problem occurring at a low rotating speed is eliminated, and the problem that the electronic water pump is ablated or the water temperature of an engine rises when the electronic water pump operates at a low speed is avoided. Meanwhile, the rotating speed of the electronic water pump is increased to achieve automatic flushing recovery of the electronic water pump, the alarm frequency of the electronic water pump can be reduced, the manual maintenance frequency is effectively reduced, and the user satisfaction is improved.

Description

Technical Field

[0001] The present application relates to the technical field of electronic water pumps, and in particular to a troubleshooting method, electronic equipment and a vehicle. Background Art

[0002] In the context of energy conservation, emission reduction and rapid development of new energy, the application of electronic water pumps in engines has become more and more extensive. The speed and power of the electronic water pump change dynamically according to the cooling needs of the engine. When the engine speed and heat dissipation requirements are relatively low, the speed of the electronic water pump is also relatively low. However, during the low-speed operation of the electronic water pump, the motor may be blocked. Since the driving torque of the electronic water pump is low during low-speed operation, it cannot be flushed and recovered by itself, resulting in problems such as electronic water pump ablation and increased engine water temperature. Summary of the invention

[0003] In view of this, the purpose of the present application is to provide a troubleshooting method, electronic equipment and vehicle to solve the problem that the electronic water pump is stuck and cannot be flushed and restored by itself when running at a low speed.

[0004] Based on the above purpose, the first aspect of the present application provides a troubleshooting method, comprising:

[0005] Obtain engine operation information and electronic water pump operation information;

[0006] Determining whether the electronic water pump has a stall fault according to the engine operation information and / or the electronic water pump operation information;

[0007] 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.

[0008] By increasing the flow rate of the electronic water pump, the electronic water pump can be automatically flushed and restored, eliminating the problem of stalling, and avoiding the problem of electronic water pump ablation or engine water temperature rise when the electronic water pump is running at a low speed. At the same time, the alarm frequency of the electronic water pump is reduced, thereby effectively reducing the number of manual maintenance times and improving user satisfaction.

[0009] Optionally, the engine operation information includes the engine water temperature, and the electronic water pump operation information includes the actual speed of the electronic water pump; and determining whether the electronic water pump has a stall fault according to the engine operation information and / or the electronic water pump operation information includes:

[0010] In response to determining that the actual speed of the electronic water pump meets a preset speed abnormality condition and the engine water temperature exceeds a preset water temperature upper limit threshold, it is determined that the electronic water pump has a stall fault.

[0011] In this embodiment, when the electronic water pump has an abnormal speed and the engine water temperature exceeds the preset water temperature upper limit threshold, it is determined that the electronic water pump has a stall fault. This can not only accurately determine the stall fault, but also avoid the problem of misjudgment of the stall fault.

[0012] In this embodiment, when the electronic water pump has an abnormal speed and the engine water temperature exceeds the preset water temperature upper limit threshold, it is determined that the electronic water pump has a stall fault. This can not only accurately determine the stall fault, but also avoid the problem of misjudgment of the stall fault.

[0013] Optionally, the electronic water pump operation information includes a target speed of the electronic water pump;

[0014] The determining that the actual speed of the electronic water pump meets a preset speed abnormality condition includes:

[0015] In response to the difference between the target 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 the preset speed abnormality condition; wherein, the target speed of the electronic water pump 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 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.

[0016] Through the method of this embodiment, a method for quickly determining the target speed is provided, and then whether the electronic water pump has an abnormal speed problem can be quickly determined based on the target speed and the actual speed of the electronic water pump, which is conducive to the timely discovery of electronic water pump abnormalities and the rapid elimination of subsequent stall faults.

[0017] Optionally, the method further includes:

[0018] During the preset time period when the electronic water pump operates at the preset speed, in response to the change rate of the engine water temperature being greater than a preset change rate threshold, the engine load is reduced.

[0019] By reducing the engine load, the problem of increased engine water temperature can be solved, the engine water temperature can be quickly reduced, and safety hazards caused by engine overheating can be avoided.

[0020] Optionally, reducing the engine load includes:

[0021] The target limit load percentage of the engine is determined based on the engine water temperature and a second preset relationship, and the engine is controlled to operate according to the target limit load percentage; in the second preset relationship, the engine water temperature is positively correlated with the target limit load percentage.

[0022] In this embodiment, the engine load is controlled to decrease according to the gradient according to the engine water temperature, thereby achieving dynamic adjustment of the engine load according to the engine water temperature to lower the engine water temperature, ensure that the engine maintains operation within a safe range, and avoid excessive reduction of the engine load that causes the vehicle to be unable to drive normally.

[0023] Optionally, after controlling the electronic water pump to operate at the preset speed, the method further includes:

[0024] In response to the engine water temperature acquired in real time being less than a preset water temperature lower limit threshold, the electronic water pump is controlled to operate at the electronic water pump target speed.

[0025] Through the method of this embodiment, after determining that the engine water temperature has dropped to the preset water temperature lower limit threshold, the operation of the electronic water pump returns to normal, and the speed of the electronic water pump is adjusted to the target speed, which can reduce the power consumption of the electronic water pump and prevent the engine water temperature from being too low.

[0026] Optionally, the engine operation information includes engine water temperature; the method further includes:

[0027] In response to the engine water temperature being within a preset water temperature range, determining a stall impact frequency corresponding to the preset water temperature range;

[0028] The electronic water pump is controlled to operate at the preset speed according to the stall impact frequency.

[0029] 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 has abnormal speed, effectively reducing the probability of subsequent abnormal speed of the electronic water pump, thereby improving user satisfaction.

[0030] Optionally, the electronic water pump operation information includes a target speed of the electronic water pump and an actual current of the electronic water pump;

[0031] The determining whether the electronic water pump has a stall fault according to the engine operation information and / or the electronic water pump operation information includes:

[0032] determining a target current of the electronic water pump according to the target speed of the electronic water pump and a third preset relationship;

[0033] In response to a difference between the actual current of the electronic water pump and the target current of the electronic water pump being greater than a second preset difference threshold, it is determined that a stall fault exists in the electronic water pump.

[0034] This embodiment provides a method for determining whether an electronic water pump has a stall fault based on the electronic water pump current, which provides an additional judgment method for determining a stall fault and enriches the basis for judging a stall fault. In addition, when judging whether an electronic water pump has a stall fault, different judgment methods can be used to verify each other to further reduce the probability of misjudgment.

[0035] Based on the same inventive concept, the second aspect of the present 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 described in the first aspect when executing the computer program.

[0036] Based on the same inventive concept, the third aspect of the present application also provides a vehicle, which includes the electronic device as described in the second aspect.

[0037] As can be seen from the above, the present application provides a troubleshooting method, electronic equipment and vehicle, the method includes obtaining engine operation information and electronic water pump operation information, and determining whether the electronic water pump has a stall fault according to the engine operation information and / or the electronic water pump operation information. If the electronic water pump has a stall fault, it means that the electronic water pump is operating abnormally, then the operating state of the electronic water pump and the operating state of the engine will change, therefore, according to the electronic water pump operation information and the engine operation information, it can be accurately determined whether the electronic water pump has a stall fault. In response to determining that there is 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. After the current speed of the electronic water pump is increased to the preset speed, the flow rate of the electronic water pump increases accordingly. If the stall fault is caused by the initial part tolerance of the electronic water pump or the reduction of the cleanliness of the water channel, the electronic water pump can be automatically flushed and restored by increasing the flow rate of the electronic water pump, eliminating the stall problem at low speed, and avoiding the problem of electronic water pump ablation or engine water temperature rise when the electronic water pump is running at low speed. At the same time, increasing the speed of the electronic water pump to achieve self-flushing and recovery of the electronic water pump can also reduce the frequency of electronic water pump alarms, thereby effectively reducing the number of manual maintenance times and improving user satisfaction. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the technical solutions in the present application or related technologies, the drawings required for use in the embodiments or related technical descriptions are briefly introduced below. Obviously, the drawings described below are only embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0039] Figure 1 A flowchart of a troubleshooting method according to an embodiment of the present application;

[0040] Figure 2 A schematic diagram of the structure of a troubleshooting device according to an embodiment of the present application;

[0041] Figure 3 This is a schematic diagram of the hardware structure of an electronic device according to an embodiment of the present application. DETAILED DESCRIPTION

[0042] In order to make the objectives, technical solutions and advantages of the present application more clearly understood, the present application is further described in detail below in combination with specific embodiments and with reference to the accompanying drawings.

[0043] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the embodiments of the present application should be the usual meanings understood by people with ordinary skills in the field to which the present application belongs. The "first", "second" and similar words used in the embodiments of the present application do not represent any order, quantity or importance, but are only used to distinguish different components. "Including" or "comprising" and similar words mean that the elements or objects appearing in front of the word cover the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like 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.

[0044] In the related art, the power for the rotation of the mechanical water pump comes from the front belt or chain. Even if the mechanical water pump is slightly blocked, the belt or chain will increase the torque to pull the water pump to rotate to overcome the blocking problem. The speed of the mechanical water pump is affected by the engine speed and cannot be adjusted according to the cooling demand. The power for the rotation of the electronic water pump comes from electromagnetic force, which is controlled by the excitation current. The electronic water pump can achieve precise control of the coolant flow and temperature. When the engine speed and heat dissipation requirements are relatively low, in order to quickly warm up and reduce the heat loss of the engine, the speed of the electronic water pump is low. Due to the initial part tolerance and water channel cleanliness, the electronic water pump will occasionally have a blocking problem. However, due to the low speed of the electronic water pump and the low driving torque of the electronic water pump, the electronic water pump cannot be flushed and recovered by itself after the blocking occurs, resulting in the electronic water pump having problems such as 0 speed, ablation, fault code reporting or increased engine water temperature, affecting the normal driving of the vehicle.

[0045] In view of this, the present application proposes a troubleshooting method. When it is determined that the electronic water pump has a jam fault based on the engine operation information and / or the electronic water pump operation information, 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, thereby increasing the flow rate of the electronic water pump and improving the ability of the electronic water pump to flush and recover by itself, thereby avoiding the problem of electronic water pump failure or increased engine water temperature caused by jamming of the electronic water pump when running at a low speed.

[0046] The embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0047] This application proposes a troubleshooting method for an electronic water pump controller, referring to Figure 1 , including the following steps:

[0048] Step 102: Obtain engine operation information and electronic water pump operation information.

[0049] Specifically, the engine operation information is the data generated by the engine when it is in operation. The engine operation information may include the engine water temperature, the engine speed, and the engine load. The electronic water pump operation information is the data generated by the electronic water pump when it is in operation. The electronic water pump operation information may include the electronic water pump speed, the electronic water pump voltage, the electronic water pump current, the electronic water pump temperature, and the electronic water pump water level. The electronic water pump is usually equipped with a water level or pressure sensor to detect the state of the water source. The sensor transmits the detected signal to the controller. The controller determines the current working state of the electronic water pump based on the signal sent back by the sensor, such as whether the water level reaches the preset value, whether the pressure is too high, etc. The controller sends a corresponding control signal to the electronic water pump based on the judgment result, including turning on or off the electronic water pump, adjusting the flow, pressure or speed of the electronic water pump, etc.

[0050] Step 104: Determine whether the electronic water pump has a stall fault according to the engine operation information and / or the electronic water pump operation information.

[0051] Specifically, if the electronic water pump is blocked, the operating state of the electronic water pump or the engine will change. The electronic water pump may have a zero speed or a reduced speed. If the blockage is serious, it may also cause the electronic water pump to burn out. The abnormal operation of the electronic water pump will directly lead to a decrease in the engine's heat dissipation effect and an increase in the engine's water temperature. Therefore, the real-time acquisition of engine operation information and electronic water pump operation information can accurately reflect whether the electronic water pump has a blocked rotor failure.

[0052] Step 106 : In response to determining that a stall fault exists, increasing the speed of the electronic water pump to a preset speed, and controlling the electronic water pump to operate at the preset speed.

[0053] Specifically, when it is determined that there is a stall fault, the stall fault needs to be repaired to avoid affecting the normal operation of the subsequent electronic water pump. If the speed of the electronic water pump is low at this time, in order to improve the water pump's own ability to flush and recover, the speed of the electronic water pump can be increased to a preset speed accordingly. The preset speed is the minimum speed at which the electronic water pump can be flushed and recovered by itself by increasing the flow rate of the electronic water pump when the electronic water pump is stalled due to the influence of initial parts tolerance or waterway cleanliness. Exemplarily, the preset speed can be the maximum speed of the electronic water pump. When the electronic water pump is running at the preset speed, the driving torque and flow rate of the electronic water pump increase accordingly, and the ability of the electronic water pump to impact the stall by itself is improved, which can effectively eliminate the stall fault without manual maintenance, and also reduces the probability of electronic water pump fault alarm.

[0054] Based on the above steps 102 to 106, this embodiment provides a troubleshooting method, including obtaining engine operation information and electronic water pump operation information, and determining whether the electronic water pump has a stall fault according to the engine operation information and / or the electronic water pump operation information. If the electronic water pump has a stall fault, it means that the electronic water pump is operating abnormally, and the operating state of the electronic water pump and the operating state of the engine will change. Therefore, it can be accurately determined whether the electronic water pump has a stall fault according to the electronic water pump operation information and the engine operation information. In response to determining that there is 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. After the current speed of the electronic water pump is increased to the preset speed, the flow rate of the electronic water pump increases accordingly. If the stall fault is caused by the initial part tolerance of the electronic water pump or the reduction of the cleanliness of the water channel, the electronic water pump can be automatically flushed and restored by increasing the flow rate of the electronic water pump, eliminating the stall problem at low speed, and avoiding the problem of electronic water pump ablation or engine water temperature rise when the electronic water pump is running at a low speed. At the same time, increasing the speed of the electronic water pump to achieve self-flushing and recovery of the electronic water pump can also reduce the frequency of electronic water pump alarms, thereby effectively reducing the number of manual maintenance times and improving user satisfaction.

[0055] The following describes a method for determining whether an electronic water pump has a stall fault through a specific embodiment.

[0056] In some embodiments, the engine operation information includes the engine water temperature, and the electronic water pump operation information includes the actual speed of the electronic water pump; and determining whether the electronic water pump has a stall fault according to the engine operation information and / or the electronic water pump operation information includes:

[0057] In response to determining that the actual speed of the electronic water pump meets a preset speed abnormality condition and the engine water temperature exceeds a preset water temperature upper limit threshold, it is determined that the electronic water pump has a stall fault.

[0058] Specifically, if the electronic water pump has a stall fault, the speed of the electronic water pump will be abnormal. In order to avoid misjudgment of abnormal speed caused by fluctuations in the detection signal, the abnormal speed condition is pre-set in this embodiment, and the abnormal speed condition can accurately determine whether the speed of the electronic water pump has an abnormal situation. If it is determined that the speed is abnormal, and at the same time the engine water temperature rises and exceeds the upper limit threshold of the water temperature, it means that the abnormality of the electronic water pump has caused the engine heat dissipation efficiency to deteriorate, and it can be determined that the electronic water pump has a stall fault. The upper limit threshold of the water temperature is slightly lower than the highest balanced water temperature of the engine. For example, the highest balanced water temperature of the engine is 115°C, and the upper limit threshold of the water temperature can be 102°C. The reasonable setting of the upper limit threshold of the water temperature can take troubleshooting measures before the engine water temperature reaches the highest balanced water temperature to flush the electronic water pump stall, restore the electronic water pump's heat dissipation capacity for the engine, and avoid damage to the electronic water pump and the engine. In this embodiment, when the electronic water pump has an abnormal speed and the engine water temperature exceeds the preset upper limit threshold of the water temperature, it is determined that the electronic water pump has a stall fault, which can not only accurately determine the stall fault, but also avoid the problem of misjudgment of the stall fault.

[0059] It should be noted that if the electronic water pump is not equipped with a speed sensor and the actual speed of the electronic water pump cannot be detected, it is possible to determine whether the electronic water pump has a stall fault based only on the engine water temperature. The specific judgment method is: if the engine water temperature exceeds the preset water temperature upper limit threshold, it is determined that the electronic water pump has a stall fault. However, since there are many factors that cause the engine water temperature to rise, it may not be accurate to determine whether the electronic water pump has a stall fault based only on the engine water temperature. Therefore, when the actual speed of the electronic water pump can be detected, it is preferred to combine the actual speed of the electronic water pump and the engine water temperature to jointly determine whether the electronic water pump has a stall fault. The problem of misjudgment of engine stall faults can be effectively avoided.

[0060] Based on the above-mentioned embodiments, a method for determining whether the actual speed of the electronic water pump meets the preset speed abnormality condition is described through the following specific embodiments.

[0061] In some embodiments, the electronic water pump operation information includes a target speed of the electronic water pump;

[0062] The determining that the actual speed of the electronic water pump meets a preset speed abnormality condition includes:

[0063] In response to the difference between the target 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 the preset speed abnormality condition; wherein, the target speed of the electronic water pump 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 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.

[0064] Specifically, the engine controller sends the target speed to the electronic water pump controller, and the electronic water pump controller controls the electronic water pump to operate at the target speed. However, due to some external factors, the actual speed of the electronic water pump is not equal to the target speed, but some fluctuations occur. Within the normal fluctuation range of the 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 regarded as operating normally. However, when the difference between the target speed and the actual speed of the electronic water pump is greater than the first preset difference threshold, it means that the difference between the actual speed of the electronic water pump and the target speed is large, which does not belong to the normal speed fluctuation range, and the operation of the electronic water pump is abnormal. At this time, it is determined that the actual speed of the electronic water pump meets the preset speed abnormality condition. Exemplarily, the actual speed of the electronic water pump is recorded as n2, and the target speed is recorded as n1. If n1-n2>10rpm, it is determined that the actual speed of the electronic water pump meets the preset speed abnormality condition, wherein the first preset difference threshold is 10rpm.

[0065] Since the speed of the electronic water pump changes dynamically according to the heat dissipation requirements of the engine, the target speed of the electronic water pump also changes dynamically. The engine controller determines the target speed based on the engine speed, engine load and the first preset relationship, and then sends the target speed to the controller of the electronic water pump. In specific implementation, in the first preset relationship, the corresponding relationship between the engine speed, engine load and the target speed of the electronic water pump is calibrated. After the engine speed and engine load are determined, a unique target speed can be matched in the first preset relationship. The target speed is the required speed of the electronic water pump under normal operation.

[0066] When the engine speed is constant, the target speed is positively correlated with the engine load, that is, the greater the engine load, the greater the target speed. The greater the engine load, the greater the engine heat dissipation demand, so the target speed is greater. When the engine load is constant, the target speed is positively correlated with the engine speed, that is, the greater the engine speed, the greater the target speed. The greater the engine speed, the greater the engine heat dissipation demand, so the target speed is greater.

[0067] In addition, in the first preset relationship, the corresponding relationship between the engine speed, the engine load and the target duty cycle of the electronic water pump can also be calibrated. After the engine speed and the engine load are determined, a unique target duty cycle can be matched in the first preset relationship. The target duty cycle is the duty cycle of the electronic water pump under normal operation. When the engine speed is constant, the target duty cycle is positively correlated with the engine load, that is, the greater the engine load, the greater the target duty cycle. The greater the engine load, the greater the heat dissipation demand of the engine, therefore, the greater the target duty cycle, the faster the speed of the electronic water pump. When the engine load is constant, the target duty cycle is positively correlated with the engine speed, that is, the greater the engine speed, the greater the target duty cycle. The greater the engine speed, the greater the heat dissipation demand of the engine, therefore, the greater the target duty cycle, the faster the speed of the electronic water pump. After the target duty cycle is queried, the product of the maximum speed of the electronic water pump and the target duty cycle is the target speed of the electronic water pump.

[0068] For example, the engine load may be a relative charge volume rl in the engine cylinder, and the relative charge volume rl is calculated as follows:

[0069]

[0070] Wherein, m_luft_br represents the gas mass in the combustion chamber, m_norm represents the gas mass in the combustion chamber under standard conditions, p_luft_dr represents the gas pressure in the combustion chamber, P0 represents the gas pressure under standard conditions, P0 = 1013 hPa, T0 represents the air temperature under standard conditions, T0 = 273 K, T br Indicates the air temperature before the combustion chamber.

[0071] Through the method of this embodiment, a method for quickly determining the target speed is provided, and then whether the electronic water pump has an abnormal speed problem can be quickly determined based on the target speed and the actual speed of the electronic water pump, which is conducive to the timely discovery of electronic water pump abnormalities and the rapid elimination of subsequent stall faults.

[0072] In addition to determining whether the electronic water pump has a stall fault by using the actual speed of the electronic water pump and the engine temperature, it is also possible to determine whether the electronic water pump has a stall fault by using the electronic water pump current, which is described below through a specific embodiment.

[0073] In some embodiments, the electronic water pump operation information includes the electronic water pump target speed and the electronic water pump actual current;

[0074] The determining whether the electronic water pump has a stall fault according to the engine operation information and / or the electronic water pump operation information includes:

[0075] determining a target current of the electronic water pump according to the target speed of the electronic water pump and a third preset relationship;

[0076] In response to a difference between the actual current of the electronic water pump and the target current of the electronic water pump being greater than a second preset difference threshold, it is determined that a stall fault exists in the electronic water pump.

[0077] Specifically, when the electronic water pump runs at a certain speed, a corresponding current will be generated. If the current of the electronic water pump is abnormal, it can reflect the abnormal speed of the electronic water pump to a certain extent. When the electronic water pump is blocked, the current will rise to a certain extent. In order to facilitate the query of the target current corresponding to the target speed, the corresponding relationship between the target speed of the electronic water pump and the target current of the electronic water pump can be pre-calibrated in the third preset relationship. Generally speaking, when the load of the electronic water pump is constant, the target current increases with the increase of the target speed.

[0078] Determine the target speed of the electronic water pump and the actual current of the electronic water pump, query in the third preset relationship based on the target speed, and determine the target current. Compare the actual current of the electronic water pump with the target current. If the difference between the actual current of the electronic water pump and the target current is greater than the second preset difference threshold, it means that the gap between the actual current of the electronic water pump and the target current is large, and the current of the electronic water pump shows an abnormal upward trend, and it is determined that the electronic water pump has a stall fault. The second preset difference threshold can be determined according to the rated power and actual demand of the electronic water pump, and no specific restrictions are made in this embodiment. This embodiment provides a method for determining whether the electronic water pump has a stall fault based on the current of the electronic water pump. Compared with the method of determining the stall fault based on the actual speed of the electronic water pump and the engine water temperature in the aforementioned embodiment, this embodiment provides an additional judgment method for determining the stall fault, enriching the judgment basis of the stall fault. In addition, when judging whether the electronic water pump has a stall fault, different judgment methods can also be used to verify each other to further reduce the probability of misjudgment.

[0079] After controlling the electronic water pump to run at a preset speed, it is necessary to continue to monitor whether the heat dissipation effect of the engine is improved. If not, further cooling measures need to be taken to ensure that no damage is caused to the engine. The following is an explanation through a specific embodiment.

[0080] In some embodiments, the method further comprises:

[0081] During the preset time period when the electronic water pump operates at the preset speed, in response to the change rate of the engine water temperature being greater than a preset change rate threshold, the engine load is reduced.

[0082] Specifically, after the speed of the electronic water pump is increased from the current speed to the preset speed, the electronic water pump operates for a preset time. Within the preset time, if the engine water temperature change rate is greater than the preset change rate threshold, it indicates that the engine water temperature is in a gradually rising state. Among them, the preset change rate threshold is a value greater than zero, such as the preset change rate threshold is 0.5. The preset time can be 5s. If the engine water temperature gradually rises, it means that the heat dissipation effect of the electronic water pump has not been improved, and the problem of engine water temperature overheating cannot be improved by simply increasing the speed of the electronic water pump. At this time, in order to protect the engine, it is necessary to further reduce the engine load, so as to solve the problem of rising engine water temperature, achieve a rapid drop in engine water temperature, and avoid safety hazards caused by engine overheating.

[0083] Further, reduce engine load, including:

[0084] The target limit load percentage of the engine is determined based on the engine water temperature and a second preset relationship, and the engine is controlled to operate according to the target limit load percentage; in the second preset relationship, the engine water temperature is positively correlated with the target limit load percentage.

[0085] Specifically, when reducing the engine load, the engine load is adjusted according to the real-time water temperature of the engine. In the second preset relationship, the corresponding relationship between the engine water temperature and the target limit load percentage is calibrated. The target limit load percentage characterizes the limitation of the engine load. For example, if the target limit load percentage is 20%, it means that 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, that is, the upper limit of the engine output torque is 80% of the maximum output torque. The higher the engine water temperature, the greater the engine heat dissipation demand, and the higher the target limit load percentage. Table 1 below shows the calibration values ​​in the second preset relationship. When the engine water temperature is 114°C, the target limit load percentage is 0%, and as the engine water temperature gradually increases, the target limit load percentage gradually increases. When the engine water temperature reaches 120°C, the target limit load percentage increases to 70%. In this embodiment, according to the engine water temperature, the engine load upper limit is controlled to decrease according to the gradient, so as to achieve the purpose of dynamically adjusting the engine load upper limit according to the engine water temperature to reduce the engine water temperature, maintain the engine operation within a safe range, and avoid excessively reducing the engine load upper limit to cause the vehicle to be unable to drive normally.

[0086] Table 1 Second preset relationship

[0087]

[0088] It should be noted that when adjusting the target limit load percentage, the instrument fault light can also be turned on to remind the user that the electronic water pump is operating abnormally and needs to be maintained in time to avoid causing vehicle driving safety problems.

[0089] After the electronic water pump runs at a preset speed, if the engine water temperature drops, the speed of the electronic water pump can be restored to a normal state, which is explained below through a specific embodiment.

[0090] In some embodiments, after controlling the electronic water pump to operate at the preset speed, the method further includes: in response to the engine water temperature acquired in real time being less than a preset water temperature lower limit threshold, controlling the electronic water pump to operate at the electronic water pump target speed.

[0091] Specifically, after the electronic water pump runs at a preset speed, if the engine water temperature drops and drops below the preset water temperature lower limit threshold, it means that the heat dissipation effect of the electronic water pump is improved and the stall fault is effectively eliminated. In order to control the engine water temperature within a reasonable range and avoid the phenomenon of the engine water temperature being too low, the speed of the electronic water pump needs to be adjusted from the preset speed to the target speed.

[0092] The target speed is the required speed of the electronic water pump under normal operation. The target speed is determined by the engine controller according to the engine speed, the engine load and the first preset relationship. In the first preset relationship, the corresponding relationship between the engine speed, the engine load and the target speed of the electronic water pump is calibrated. 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.

[0093] Through the method of this embodiment, after determining that the engine water temperature has dropped to the preset water temperature lower limit threshold, the operation of the electronic water pump returns to normal, and the speed of the electronic water pump is adjusted to the target speed, which can reduce the power consumption of the electronic water pump and prevent the engine water temperature from being too low.

[0094] The aforementioned embodiments are all corresponding measures taken when it is determined that the speed of the electronic water pump is abnormal. The present application also proposes a method to pre-adopt a stall impact strategy when the speed of the electronic water pump is not abnormal, so as to avoid or reduce the probability of abnormal speed of the electronic water pump, which is explained below through specific embodiments.

[0095] In some embodiments, the engine operation information includes engine water temperature; the method further includes:

[0096] In response to the engine water temperature being within a preset water temperature range, determining a stall impact frequency corresponding to the preset water temperature range;

[0097] The electronic water pump is controlled to operate at the preset speed according to the stall impact frequency.

[0098] Specifically, in order to prevent the electronic water pump from causing abnormal speed due to the initial component tolerance or circuit cleanliness, the engine water temperature can be monitored in real time. If the engine water temperature is within the preset water temperature range, the electronic water pump can be controlled to operate at a preset speed according to a certain stall impact frequency to reduce the probability of the engine water temperature gradually rising. In specific implementation, the corresponding relationship between the water temperature range and the stall impact frequency can be calibrated in advance. For example, when the water temperature range is 100℃~102℃, the corresponding stall impact frequency is 1 time / 30min, and the stall impact duration can be 60s. That is to say, when the engine water temperature is monitored to be between 100℃~102℃, the speed of the electronic water pump is increased to the preset speed every 30min, and the operation is maintained for 60s to eliminate the hidden danger of the electronic water pump stalling. After that, the speed of the electronic water pump 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 between 105℃~107℃, the corresponding stall impact frequency is adjusted to 1 time / 20min.

[0099] In another specific embodiment, in view of the fact that the electronic water pump is prone to stalling when running at a low speed, a stall impact frequency can also be determined according to the speed of the electronic water pump. In response to the actual speed of the electronic water pump being within a preset speed range, a stall impact frequency corresponding to the preset speed range is determined, and the electronic water pump is controlled to run at the preset speed according to the stall impact frequency, so as to reduce the probability of the engine water temperature gradually rising.

[0100] In specific implementation, the corresponding relationship between the speed range and the stall impact frequency can be calibrated in advance. For example, when the speed range is 500rpm~1000rpm, the corresponding stall impact frequency is 1 time / 20min, and the stall impact duration can be 60s. That is to say, when the speed of the electronic water pump is monitored to be between 500rpm~1000rpm, the speed of the electronic water pump is increased to the preset speed every 20min, and the operation is maintained for 60s to eliminate the hidden danger of the electronic water pump stalling. Afterwards, the speed of the electronic water pump is restored to the target speed. As the speed of the electronic water pump increases, the corresponding stall impact frequency gradually decreases. For example, when the speed range is 1001rpm~1500rpm, the corresponding stall impact frequency is adjusted to 1 time / 30min. That is to say, when the speed of the electronic water pump is monitored to be between 1001rpm~1500rpm, the speed of the electronic water pump is increased to the preset speed every 30min, and the operation is maintained for 60s to eliminate the hidden danger of the electronic water pump stalling. Afterwards, the speed of the electronic water pump is restored to the target speed.

[0101] 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 has abnormal speed, effectively reducing the probability of subsequent abnormal speed of the electronic water pump, thereby improving user satisfaction.

[0102] It should be noted that the method of the embodiment of the present application can be performed by a single device, such as a computer or server. The method of this embodiment can also be applied to a distributed scenario and completed by multiple devices cooperating with each other. In the case of such a distributed scenario, one of the multiple devices can only perform one or more steps in the method of the embodiment of the present application, and the multiple devices will interact with each other to complete the described method.

[0103] It should be noted that the above describes some embodiments of the present 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 an order different from that in the above embodiments and still achieve the desired results. In addition, the processes depicted in the accompanying drawings do not necessarily require the specific order or continuous order shown to achieve the desired results. In some embodiments, multitasking and parallel processing are also possible or may be advantageous.

[0104] Based on the same inventive concept, corresponding to any of the above-mentioned embodiment methods, the present application also provides a troubleshooting device.

[0105] refer to Figure 2 , the troubleshooting device comprises:

[0106] An acquisition module 202 is configured to acquire engine operation information and electronic water pump operation information;

[0107] A determination module 204 is configured to determine whether the electronic water pump has a stall fault according to the engine operation information and / or the electronic water pump operation information;

[0108] The control module 206 is configured to, in response to determining that a stall fault exists, increase the speed of the electronic water pump to a preset speed, and control the electronic water pump to operate at the preset speed.

[0109] In some embodiments, the engine operation information includes the engine water temperature, and the electronic water pump operation information includes the actual speed of the electronic water pump; the determination 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 speed abnormality condition and the engine water temperature exceeds a preset water temperature upper limit threshold.

[0110] In some embodiments, the electronic water pump operation information includes a target speed of the electronic water pump; a determination module 204 is configured to determine that the actual speed of the electronic water pump meets a preset speed abnormality condition in response to a difference between the target speed of the electronic water pump and the actual speed of the electronic water pump being greater than a first preset difference threshold; wherein the target speed of the electronic water pump 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 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.

[0111] In some embodiments, the control module 206 is further configured to reduce the engine load in response to a change rate of the engine water temperature being greater than a preset change rate threshold within a preset time period when the electronic water pump operates at the preset speed.

[0112] In some embodiments, the control module 206 is further configured to determine a target limit load percentage of the engine based on the engine water 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 water temperature is positively correlated with the target limit load percentage.

[0113] In some embodiments, after controlling the electronic water pump to operate at the preset speed, the control module 206 is further configured to control the electronic water pump to operate at the electronic water pump target speed in response to the real-time engine water temperature being less than a preset water temperature lower limit threshold.

[0114] In some embodiments, the engine operation information includes the engine water temperature; the control module 206 is also configured to determine a stall impact frequency corresponding to the preset water temperature range in response to the engine water temperature being within the preset water temperature range; and control the electronic water pump to operate at the preset speed according to the stall impact frequency.

[0115] In some embodiments, the electronic water pump operation information includes the electronic water pump target speed and the electronic water pump actual current; the determination module 204 is also configured to determine the electronic water pump target current based on the electronic water pump target speed and a third preset relationship; in response to the difference between the electronic water pump actual current and the electronic water pump target current being greater than a second preset difference threshold, it is determined that the electronic water pump has a stall fault.

[0116] For the convenience of description, the above device is described in terms of functions divided into various modules. Of course, when implementing the present application, the functions of each module can be implemented in the same or multiple software and / or hardware.

[0117] The device of the above embodiment is used to implement the corresponding troubleshooting method in any of the above embodiments, and has the beneficial effects of the corresponding method embodiment, which will not be repeated here.

[0118] Based on the same inventive concept, corresponding to any of the above-mentioned embodiments, the present 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 when the processor executes the program, the troubleshooting method described in any of the above embodiments is implemented.

[0119] Figure 3 A more specific schematic diagram of the hardware structure of an electronic device provided in this embodiment is shown, and 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, the memory 1020, the input / output interface 1030, and the communication interface 1040 are connected to each other through the bus 1050 in the device.

[0120] The processor 1010 can be implemented by a general-purpose CPU (Central Processing Unit), a microprocessor, an 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.

[0121] The memory 1020 may be implemented in the form of ROM (Read Only Memory), RAM (Random Access Memory), static storage device, dynamic storage device, etc. The memory 1020 may store an operating system and other application programs. When the technical solutions provided in the embodiments of this specification are implemented by software or firmware, the relevant program codes are stored in the memory 1020 and are called and executed by the processor 1010.

[0122] The input / output interface 1030 is used to connect the input / output module to realize information input and output. The input / output module can be configured in the device as a component (not shown in the figure), or it can be externally connected to the device to provide corresponding functions. The input device may include a keyboard, a mouse, a touch screen, a microphone, various sensors, etc., and the output device may include a display, a speaker, a vibrator, an indicator light, etc.

[0123] The communication interface 1040 is used to connect a communication module (not shown) to realize communication interaction between the device and other devices. The communication module can realize communication through a wired mode (such as USB, network cable, etc.) or a wireless mode (such as mobile network, WIFI, Bluetooth, etc.).

[0124] The bus 1050 includes a path that transmits information between the various components of the device (eg, the processor 1010, the memory 1020, the input / output interface 1030, and the communication interface 1040).

[0125] It should be noted that, although the above device only shows the processor 1010, the memory 1020, the input / output interface 1030, the communication interface 1040 and the bus 1050, in the specific implementation process, the device may also include other components necessary for normal operation. In addition, it can be understood by those skilled in the art that the above device may also only include the components necessary for implementing the embodiments of the present specification, and does not necessarily include all the components shown in the figure.

[0126] The electronic device of the above-mentioned embodiment is used to implement the corresponding troubleshooting method in any of the above-mentioned embodiments, and has the beneficial effects of the corresponding method embodiment, which will not be described in detail here.

[0127] Based on the same inventive concept, corresponding to any of the above-mentioned embodiment methods, the present application also provides a non-transitory computer-readable storage medium, wherein the non-transitory computer-readable storage medium stores computer instructions, and the computer instructions are used to enable the computer to execute the troubleshooting method described in any of the above embodiments.

[0128] 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, modules of programs, 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 technology, read-only compact disk read-only memory (CD-ROM), digital versatile disk (DVD) or other optical storage, magnetic cassettes, magnetic tape magnetic disk storage or other magnetic storage devices or any other non-transmission media that can be used to store information that can be accessed by a computing device.

[0129] The computer instructions stored in the storage medium of the above embodiments are used to enable the computer to execute the troubleshooting method described in any of the above embodiments, and have the beneficial effects of the corresponding method embodiments, which will not be repeated here.

[0130] Based on the same concept, corresponding to any of the above-mentioned embodiment methods, the present application also provides a computer program product, including computer program instructions. When the computer program instructions are run on a computer, the computer executes the method described in any of the above embodiments, which has the beneficial effects of the corresponding method embodiments and will not be repeated here.

[0131] A person skilled in the art should understand that the discussion of any of the above embodiments is merely illustrative and is not intended to imply that the scope of the present application is limited to these examples. In line with the concept of the present application, the technical features in the above embodiments or different embodiments may be combined, the steps may be implemented in any order, and there are many other variations of the different aspects of the embodiments of the present application as described above, which are not provided in detail for the sake of simplicity.

[0132] In addition, to simplify the description and discussion, and in order not to make the embodiments of the present application difficult to understand, the known power supply / ground connection with the integrated circuit (IC) chip and other components may or may not be shown in the provided drawings. In addition, the device can be shown in the form of a block diagram to avoid making the embodiments of the present application difficult to understand, and this also takes into account the fact that the details of the implementation of these block diagram devices are highly dependent on the platform to be implemented in the embodiments of the present application (that is, these details should be fully within the scope of understanding of those skilled in the art). In the case of elaborating specific details (e.g., circuits) to describe exemplary embodiments of the present application, it is obvious to those skilled in the art that the embodiments of the present application can be implemented without these specific details or when these specific details are changed. Therefore, these descriptions should be considered to be illustrative rather than restrictive.

[0133] Although the present application has been described in conjunction with specific embodiments of the present application, many replacements, 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 use the embodiments discussed.

[0134] The embodiments of the present application are intended to cover all such substitutions, modifications and variations that fall within the broad scope of the present application. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the embodiments of the present application should be included in the protection scope of the present application.

Claims

1. A troubleshooting method, characterized in that: include: Obtain engine operation information and electronic water pump operation information; Determining whether the electronic water pump has a stall fault according to the engine operation information and / or the electronic water pump operation information; 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.

2. The method according to claim 1, characterized in that The engine operation information includes the engine water temperature, and the electronic water pump operation information includes the actual speed of the electronic water pump; and determining whether the electronic water pump has a stall fault according to the engine operation information and / or the electronic water pump operation information includes: In response to determining that the actual speed of the electronic water pump meets a preset speed abnormality condition and the engine water temperature exceeds a preset water temperature upper limit threshold, it is determined that the electronic water pump has a stall fault.

3. The method according to claim 2, characterized in that The electronic water pump operation information includes the electronic water pump target speed; The determining that the actual speed of the electronic water pump meets a preset speed abnormality condition includes: In response to the difference between the target 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 the preset speed abnormality condition; wherein, the target speed of the electronic water pump 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 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.

4. The method according to claim 2, characterized in that: The method further comprises: During the preset time period when the electronic water pump operates at the preset speed, in response to the change rate of the engine water temperature being greater than a preset change rate threshold, the engine load is reduced.

5. The method according to claim 4, characterized in that The reducing the engine load comprises: The target limit load percentage of the engine is determined based on the engine water temperature and a second preset relationship, and the engine is controlled to operate according to the target limit load percentage; in the second preset relationship, the engine water temperature is positively correlated with the target limit load percentage.

6. The method according to claim 3, characterized in that After controlling the electronic water pump to operate at the preset speed, the method further includes: In response to the engine water temperature acquired in real time being less than a preset water temperature lower limit threshold, the electronic water pump is controlled to operate at the electronic water pump target speed.

7. The method according to claim 1, characterized in that The engine operation information includes engine water temperature; the method further includes: In response to the engine water temperature being within a preset water temperature range, determining a stall impact frequency corresponding to the preset water temperature range; The electronic water pump is controlled to operate at the preset speed according to the stall impact frequency.

8. The method according to claim 1, characterized in that The electronic water pump operation information includes the electronic water pump target speed and the electronic water pump actual current; The determining whether the electronic water pump has a stall fault according to the engine operation information and / or the electronic water pump operation information includes: determining a target current of the electronic water pump according to the target speed of the electronic water pump and a third preset relationship; In response to a difference between the actual current of the electronic water pump and the target current of the electronic water pump being greater than a second preset difference threshold, it is determined that a stall fault exists in the electronic water pump.

9. An electronic device comprising a memory, a processor, and a computer program stored in the memory and running on the processor, characterized in that: When the processor executes the program, the method according to any one of claims 1 to 8 is implemented.

10. A vehicle, characterized in that: The vehicle comprises the electronic device as claimed in claim 9.

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