Water pump stall determination method, apparatus, device, and computer readable storage medium

Abstract

The embodiment of the application discloses a water pump stall discrimination method, which comprises the following steps: after receiving a water pump fault signal sent by a water pump after the water pump stalls, reading a cylinder head outlet water temperature of an engine acted on by the water pump and a cylinder body outlet water temperature of the engine; and determining whether mechanical jamming occurs to the water pump based on the cylinder head outlet water temperature and the cylinder body outlet water temperature. The embodiment of the application also discloses a water pump stall discrimination device, equipment and a computer readable storage medium.

Description

Technical Field

[0001] This application relates to the field of communication technology, and in particular to a method, apparatus, device and computer-readable storage medium for determining pump stall. Background Technology

[0002] To ensure normal engine operation, a water pump-driven cooling system is generally required to dissipate heat from the engine. However, if impurities enter the cooling system, it may cause the water pump to stall, rendering the cooling system ineffective and leading to serious consequences. In related technologies, upon receiving a water pump stall signal, the engine torque limiting protection is directly activated, which can easily result in additional operations due to misjudgment. Summary of the Invention

[0003] To address the aforementioned technical problems, this application aims to provide a method, apparatus, device, and computer-readable storage medium for determining pump stall, thereby resolving the issue of additional operations caused by misjudgment in related technologies.

[0004] The technical solution of this application is implemented as follows:

[0005] A method for detecting pump stall, the method comprising:

[0006] After receiving a water pump failure signal after the water pump stalls, the cylinder head outlet water temperature and the cylinder block outlet water temperature of the engine affected by the water pump are read.

[0007] Based on the outlet water temperature of the cylinder head and the outlet water temperature of the cylinder block, determine whether the water pump is mechanically stuck.

[0008] In the above scheme, determining whether the water pump is mechanically stuck based on the cylinder head outlet temperature and the cylinder block outlet temperature includes:

[0009] If neither the cylinder head outlet temperature nor the cylinder block outlet temperature meets the first temperature threshold, determine the temperature difference between the cylinder head outlet temperature and the cylinder block outlet temperature.

[0010] Based on the temperature difference, it is determined whether the water pump is mechanically stuck.

[0011] In the above scheme, determining whether the water pump is mechanically stuck based on the temperature difference includes:

[0012] If the temperature difference meets the jamming condition, it is determined that the water pump is mechanically jammed;

[0013] If the temperature difference does not meet the jamming condition, it is determined that the water pump has not experienced mechanical jamming.

[0014] In the above scheme, the jamming condition includes at least one of the following:

[0015] The temperature difference satisfies the second temperature threshold.

[0016] The temperature difference between the temperature rise of the cylinder head outlet water and the temperature rise of the cylinder block outlet water within the target time period satisfies the third temperature threshold.

[0017] The above scheme, the method further includes:

[0018] In the event of mechanical jamming of the water pump, the torque limiting protection of the transmitter is activated, and the water pump is restarted.

[0019] The above scheme, the method further includes:

[0020] If the water pump does not experience mechanical jamming, the water pump is restarted based on a target frequency; the target frequency is lower than the frequency used by the water pump during restart.

[0021] The above scheme, the method further includes:

[0022] If at least one of the cylinder head outlet water temperature and the cylinder block outlet water temperature meets the first temperature threshold, the torque limiting protection of the transmitter is activated.

[0023] A pump stall detection device, the device comprising:

[0024] The reading unit is used to read the cylinder head outlet water temperature and the cylinder block outlet water temperature of the engine being acted upon by the water pump after receiving a water pump stall signal.

[0025] The processing unit is used to determine whether the water pump is mechanically stuck based on the outlet water temperature of the cylinder head and the outlet water temperature of the cylinder block.

[0026] A pump stall detection device, the device comprising: a processor, a memory, and a communication bus;

[0027] The communication bus is used to realize the communication connection between the processor and the memory;

[0028] The processor is used to execute the pump stall detection program in the memory to implement the steps of the pump stall detection method described above.

[0029] A computer-readable storage medium storing one or more programs that can be executed by one or more processors to implement the steps of the above-described pump stall detection method.

[0030] The water pump stall detection method, apparatus, device, and computer-readable storage medium provided in the embodiments of this application can, after receiving a water pump fault signal after water pump stall, read the cylinder head outlet temperature and the cylinder block outlet temperature of the engine on which the water pump operates; based on the cylinder head outlet temperature and the cylinder block outlet temperature, determine whether the water pump is mechanically stuck; thus, based on the cylinder head outlet temperature and the cylinder block outlet temperature, it is possible to determine whether the water pump has experienced actual mechanical stall, and then, in the case of actual mechanical stall, torque limiting protection is provided to the engine; in the case of no mechanical stall, torque limiting protection is not provided to the engine; thereby performing fault degradation, reducing engine torque limiting operations, and reducing the frequency of limp-out. Attached Figure Description

[0031] Figure 1 A flowchart illustrating a pump stall detection method provided in this application embodiment;

[0032] Figure 2 A flowchart illustrating another method for determining pump stall provided in this application embodiment;

[0033] Figure 3 A flowchart illustrating another method for determining pump stall provided in this application embodiment;

[0034] Figure 4 This is a schematic diagram of a pump stall detection device provided in an embodiment of this application;

[0035] Figure 5 This is a schematic diagram of a pump stall detection device provided in an embodiment of this application. Detailed Implementation

[0036] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings.

[0037] It should be understood that the phrases "embodiments of this application" or "foreign embodiments" throughout the specification mean that a specific feature, structure, or characteristic related to an embodiment is included in at least one embodiment of this application. Therefore, "embodiments of this application" or "in the foreign embodiments" appearing throughout the specification do not necessarily refer to the same embodiment. Furthermore, these specific features, structures, or characteristics can be combined in any suitable manner in one or more embodiments. In the various embodiments of this application, the sequence numbers of the above-described processes do not imply a sequential order of execution; the execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of this application. The sequence numbers of the above-described embodiments are merely descriptive and do not represent the superiority or inferiority of the embodiments.

[0038] Unless otherwise specified, any step in the embodiments of this application performed by the electronic device may be executed by the processor of the electronic device. It is also worth noting that the embodiments of this application do not limit the order in which the electronic device performs the following steps. Furthermore, the methods used to process data in different embodiments may be the same or different methods. It should also be noted that any step in the embodiments of this application can be executed independently by the electronic device; that is, when the electronic device performs any step in the following embodiments, it may not depend on the execution of other steps.

[0039] It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the scope of this application.

[0040] To better understand the pump stall detection method provided in the embodiments of this application, the background technology and related technical terms will be explained below.

[0041] Electric water pump stall detection: The speed of the electric water pump is obtained by converting the current, voltage and other signals in the chip of the electric water pump. When the speed of the electric water pump is lower or higher than a certain threshold, it is determined that the electric water pump has stalled.

[0042] Electric water pump stalling can occur in two ways: First, there is genuine mechanical jamming. In this case, the engine needs immediate torque limiting protection. Second, a fault in the signal transmission line causes abnormalities in current and voltage signals, resulting in an abnormal calculated water pump speed. However, in reality, the water pump speed is not significantly different from the target speed; that is, the water pump speed is not abnormal. In this case, torque limiting protection is not necessary.

[0043] To distinguish whether a water pump is experiencing genuine mechanical jamming, this application provides a method for determining water pump stall. This method can be applied to water pump stall detection equipment. Figure 1 As shown, the method includes the following steps:

[0044] Step 101: After receiving the water pump stall signal, read the cylinder head outlet water temperature and the cylinder block outlet water temperature of the engine affected by the water pump.

[0045] The water pump stall signal refers to the signal issued after it is determined that the water pump has stalled. The cylinder head outlet temperature refers to the temperature of the engine cylinder head when coolant is discharged. The cylinder block outlet temperature refers to the temperature of the engine block when coolant is discharged.

[0046] In one feasible implementation, the current and voltage values ​​in the transmitter's chip can be determined; these values ​​are then converted to obtain the calculated pump speed; if the calculated pump speed is less than a speed threshold, pump stall is detected, and a pump stall signal is issued; subsequently, upon receiving the pump stall signal, the pump stall device can read the cylinder block outlet temperature from the temperature sensor located on the transmitter's cylinder block outlet, and the cylinder head outlet temperature from the temperature sensor located on the transmitter's cylinder head outlet. The cylinder head outlet temperature and cylinder block outlet temperature can be read by the pump stall device's electronic control unit.

[0047] Step 102: Based on the outlet water temperature of the cylinder head and the outlet water temperature of the cylinder block, determine whether the water pump is mechanically stuck.

[0048] In this embodiment, after receiving a water pump stall signal, it is possible to determine whether the water pump has actually experienced mechanical stall based on the cylinder head outlet temperature and the cylinder block outlet temperature. If the water pump has actually experienced mechanical stall, torque limiting protection is applied to the transmitter; if the water pump has not experienced mechanical stall, torque limiting protection is not applied to the transmitter. This results in fault degradation and reduces torque limiting operations on the transmitter.

[0049] In one feasible implementation, it can be determined whether the water pump is stuck based on the cylinder head outlet water temperature, the cylinder block outlet water temperature, and a preset temperature threshold.

[0050] In some embodiments, the water pump stall signal can be processed differently depending on the water pump jamming result. For example, if the jamming result indicates that the water pump has not mechanically stalled, the engine torque limiting protection is not applied, and the water pump is only restarted to perform fault degradation, reduce engine torque limiting operation, and reduce the frequency of limp-out. If the jamming result indicates that the water pump has mechanically stalled, the engine torque limiting protection is activated, and the water pump is restarted at the same time.

[0051] The pump stall detection method provided in this application can determine whether the pump is experiencing actual mechanical stall based on the cylinder head outlet temperature and the cylinder block outlet temperature. In the event of actual mechanical stall, torque limiting protection is applied to the transmitter; in the event that the pump is not experiencing mechanical stall, torque limiting protection is not applied to the transmitter. This results in fault degradation, reduces torque limiting operations on the transmitter, and reduces the frequency of limp-out.

[0052] Based on the foregoing embodiments, this application provides a method for determining pump stall, applied to a pump stall determination device, with reference to... Figure 2 As shown, the method includes the following steps:

[0053] Step 201: After receiving the water pump stall signal, read the cylinder head outlet water temperature and the cylinder block outlet water temperature of the engine affected by the water pump.

[0054] In some embodiments, after reading the engine cylinder head outlet temperature and the cylinder block outlet temperature, it can be determined whether at least one of the engine cylinder head outlet temperature and the cylinder block outlet temperature meets a first temperature threshold; if at least one of the engine cylinder head outlet temperature and the cylinder block outlet temperature meets the first temperature threshold, then step 204 is executed; if neither the engine cylinder head outlet temperature nor the cylinder block outlet temperature meets the first temperature threshold, then step 202 is executed.

[0055] The first temperature threshold is a safety protection temperature, serving as the engine's safety defense. At least one of the cylinder head outlet temperature and the cylinder block outlet temperature must meet the first temperature threshold, including: the cylinder head outlet temperature meets the first temperature threshold, the cylinder block outlet temperature meets the first temperature threshold, and both the cylinder head outlet temperature and the cylinder block outlet temperature meet the first temperature threshold.

[0056] In one feasible implementation, satisfying the third temperature threshold can mean being greater than or equal to the first temperature threshold. Thus, determining whether at least one of the engine cylinder head outlet temperature and cylinder block outlet temperature satisfies the first temperature threshold means determining whether the cylinder head outlet temperature is greater than or equal to the first temperature threshold, or whether the cylinder block outlet temperature is greater than or equal to the first temperature threshold, or whether both the cylinder head outlet temperature and cylinder block outlet temperature are greater than or equal to the first temperature threshold. In all three cases—when the cylinder head outlet temperature is greater than or equal to the first temperature threshold, or when the cylinder block outlet temperature is greater than or equal to the first temperature threshold, or when both the cylinder head outlet temperature and cylinder block outlet temperature are greater than or equal to the first temperature threshold—the first temperature threshold is considered to be satisfied. If both the cylinder head outlet temperature and cylinder block outlet temperature are less than the first temperature threshold, the first temperature threshold is considered not satisfied.

[0057] Step 202: If neither the cylinder head outlet temperature nor the cylinder block outlet temperature meets the first temperature threshold, determine the temperature difference between the cylinder head outlet temperature and the cylinder block outlet temperature.

[0058] The fact that neither the cylinder head outlet temperature nor the cylinder block outlet temperature meets the first temperature threshold indicates that both the cylinder head outlet temperature and the cylinder block outlet temperature are below the first temperature threshold.

[0059] Generally, the cooling circuit of the cooling system enters through the inlet and flows through the pistons, cylinders and other components of the engine, to the cylinder head outlet, and then to the cylinder block outlet. Therefore, the temperature at the cylinder head outlet is generally higher than the temperature at the cylinder block outlet.

[0060] In one feasible implementation, the temperature difference can be obtained by subtracting the cylinder head outlet temperature from the cylinder block outlet temperature.

[0061] Step 203 determines whether the water pump is mechanically stuck based on the temperature difference.

[0062] In this embodiment, based on the temperature difference between the cylinder head outlet water temperature and the cylinder block outlet water temperature, it can be determined whether the water pump stall is due to a real mechanical jam or a false abnormality caused by an abnormality in the wiring terminals. A false abnormality caused by an abnormality in the wiring terminals means that the water pump has not actually experienced mechanical jamming, and in this case, there is no need to perform torque limiting protection on the engine.

[0063] Step 203 can be achieved through the following steps 203a to 203b:

[0064] Step 203a: If the temperature difference meets the jamming condition, determine that the water pump is mechanically jammed.

[0065] The jamming condition includes at least one of the following:

[0066] The temperature difference satisfies the second temperature threshold.

[0067] The temperature difference between the temperature rise of the cylinder head outlet water and the temperature rise of the cylinder block outlet water within the target time period satisfies the third temperature threshold.

[0068] In this embodiment, the second temperature threshold is a temperature threshold set for the temperature difference between the cylinder head outlet temperature and the cylinder block outlet temperature to determine whether the water pump has mechanically jammed. The second temperature threshold can be preset and can be set to 20 degrees Celsius. The target time period refers to the time period for determining whether the water pump has mechanically jammed; the target time period can be preset and can be set to 5 seconds. The third temperature threshold is a temperature threshold set for the temperature difference between the temperature rise of the cylinder head outlet temperature and the temperature rise of the cylinder block outlet temperature within the target time period to determine whether the water pump has mechanically jammed. It should be noted that the target time period, the second temperature threshold, and the third temperature threshold can all be set according to the actual business scenario, and this embodiment does not limit them.

[0069] In some embodiments, the jamming condition may be that the temperature difference between the cylinder head outlet water temperature and the cylinder block outlet water temperature is greater than or equal to a second temperature threshold; the jamming condition may also be that the temperature difference between the temperature rise of the cylinder head outlet water temperature and the temperature rise of the cylinder block outlet water temperature within a target time period is greater than or equal to a third temperature threshold.

[0070] If the jamming condition is that the temperature difference between the cylinder head outlet temperature and the cylinder block outlet temperature is greater than or equal to the second temperature threshold, then the temperature difference satisfies the jamming condition, that is, the temperature difference between the cylinder head outlet temperature and the cylinder block outlet temperature is greater than or equal to the second temperature threshold; in this case, it is determined that the water pump has experienced actual mechanical jamming.

[0071] If the jamming condition is that the temperature difference between the temperature rise of the cylinder head outlet water and the temperature rise of the cylinder block outlet water within the target time period is greater than or equal to the third temperature threshold, then the temperature difference satisfies the jamming condition, that is, the temperature difference between the temperature rise of the cylinder head outlet water and the temperature rise of the cylinder block outlet water within the target time period is greater than or equal to the third temperature threshold; in this case, it is determined that the water pump has experienced real mechanical jamming.

[0072] Step 203b: If the temperature difference does not meet the jamming condition, determine that the water pump has not jammed.

[0073] If the jamming condition is that the temperature difference between the cylinder head outlet temperature and the cylinder block outlet temperature is greater than or equal to the second temperature threshold, then the temperature difference does not meet the jamming condition. That is, the temperature difference between the cylinder head outlet temperature and the cylinder block outlet temperature is less than the second temperature threshold. In this case, it is determined that the water pump has not experienced actual mechanical jamming. The water pump blockage may be caused by abnormal wiring terminals.

[0074] If the jamming condition is that the temperature difference between the temperature rise of the cylinder head outlet water and the temperature rise of the cylinder block outlet water within the target time period is greater than or equal to the third temperature threshold, then the temperature difference does not meet the jamming condition. That is, the temperature difference between the temperature rise of the cylinder head outlet water and the temperature rise of the cylinder block outlet water within the target time period is less than the third temperature threshold. In this case, it is determined that the water pump has not experienced actual mechanical jamming.

[0075] Step 204: If at least one of the cylinder head outlet water temperature and the cylinder block outlet water temperature meets the first temperature threshold, activate the torque limiting protection of the transmitter.

[0076] If at least one of the cylinder head outlet temperature and the cylinder block outlet temperature meets the first temperature threshold, it means that the current engine temperature is too high and there is a high probability of an abnormality. At this time, safety measures need to be activated immediately to protect the engine.

[0077] In one feasible implementation, the torque limiting protection of the generator can be activated immediately when the cylinder head outlet water temperature is greater than or equal to the first temperature threshold, or when the cylinder block outlet water temperature is greater than or equal to the first temperature threshold, or when both the cylinder head outlet water temperature and the cylinder block outlet water temperature are greater than or equal to the first temperature threshold.

[0078] Based on the foregoing embodiments, in other embodiments of this application, such as Figure 3 As shown, the method for detecting pump stall may further include the following steps:

[0079] Step 205: In the event of mechanical jamming of the water pump, activate the torque limiting protection of the transmitter and restart the water pump.

[0080] In one feasible implementation, in the event of actual mechanical jamming of the water pump, the torque limiting protection of the transmitter is activated, and the water pump is restarted simultaneously.

[0081] The torque limiting protection of the generator can be achieved by reducing the generator's maximum torque from a first preset torque to a second preset torque, thereby preventing the generator from performing high-power work. For example, fuel injection and air intake can be controlled via the control terminal to prevent the generator from generating excessive torque output.

[0082] Furthermore, a condition for stopping the generator can be preset. This condition can be: the temperature difference between the cylinder head outlet temperature and the cylinder block outlet temperature is greater than a fourth temperature threshold, and the third temperature threshold is higher than the first temperature threshold. In this case, the generator will stop operating directly when the temperature difference between the cylinder head outlet temperature and the cylinder block outlet temperature is greater than the fourth temperature threshold.

[0083] Restarting the water pump serves two purposes: firstly, it allows the pump to save itself; secondly, it uses mechanical stretching to quickly extend the pump from 0 RPM to its maximum RPM (500 RPM), thereby flushing away any blockages.

[0084] Step 206: If the water pump does not experience mechanical jamming, restart the water pump based on a target frequency; the target frequency is lower than the frequency used by the water pump during restart.

[0085] The target frequency can be preset, and the specific setting can be determined according to actual business needs. Frequency and speed are interchangeable, so the target frequency can be set to the frequency corresponding to 2500 RPM.

[0086] In one feasible implementation, if the water pump does not experience actual mechanical jamming, it indicates that the coolant can flow normally. Therefore, there is no need to limit the torque of the engine, reduce the pause during restart, and the frequency of restarting can be appropriately reduced to restart the water pump at a lower frequency.

[0087] The water pump stall detection method provided in this application can be applied to scenarios employing water pump technology, such as the automotive and energy storage fields. This application is primarily used to protect water pumps; specifically, upon receiving a water pump stall signal triggered by abnormal water pump speed, it determines whether the water pump stall is a genuine mechanical jam or a false abnormality caused by a wiring terminal malfunction based on the cylinder head outlet temperature and cylinder block outlet temperature of the engine on which the water pump operates. Furthermore, in the case of genuine mechanical jamming, the transmitter's torque limiting protection is activated, and the water pump is restarted simultaneously; in the case of no genuine mechanical jamming, the water pump is restarted at a lower frequency.

[0088] It should be noted that the descriptions of the same steps and contents as in other embodiments in this embodiment can be found in the descriptions in other embodiments, and will not be repeated here.

[0089] The pump stall detection method provided in this application can determine whether the pump is experiencing actual mechanical stall based on the cylinder head outlet temperature and the cylinder block outlet temperature. In the event of actual mechanical stall, torque limiting protection is applied to the transmitter; in the event that the pump is not experiencing mechanical stall, torque limiting protection is not applied to the transmitter. This results in fault degradation, reduces torque limiting operations on the transmitter, and reduces the frequency of limp-out.

[0090] The following describes the application of the pump stall detection method provided in this application in the electric vehicle scenario.

[0091] The cooling system of an electric vehicle can consist of multiple components such as coolant, electric water pump, radiator, fan, and sensors. When diagnosing the electric water pump, the cylinder head outlet temperature and the engine block outlet temperature can be used as criteria. When the electric water pump stalls, it sends a stall fault signal to the ECU (Electronic Control Unit). Upon receiving the signal, the ECU reads the water temperature from the temperature sensors located at the engine block outlet and the cylinder head outlet. Theoretically, the cylinder head outlet temperature should be higher than the cylinder block outlet temperature. If, within T seconds (e.g., 5 seconds), the cylinder head outlet temperature is significantly higher than the cylinder block outlet temperature (e.g., a temperature difference exceeding 20°C), it is determined that the electric water pump is stuck, the engine speed is too low, the engine enters torque limiting protection, and the electric water pump enters de-stalling mode (i.e., electric water pump). If the coolant temperatures at the cylinder head and cylinder block outlets are found to be roughly the same, it is determined that the electric water pump is not mechanically stuck, the coolant is flowing normally, and the engine does not require torque limiting protection to reduce restart pauses. However, there may be abnormalities such as short circuits or poor contact at this time. Therefore, the electric water pump will still enter the unblocking operation. In this case, the abnormality is not so urgent, and the frequency of the unblocking operation can be appropriately reduced, and the cycle can be lengthened, i.e., the extension interval can be longer. When either the engine cylinder head outlet temperature or the engine block outlet temperature exceeds the safe protection temperature T0, the engine torque limiting protection is activated.

[0092] The water pump blockage detection method provided in this application has at least the following beneficial effects: it determines whether there is actual mechanical jamming in the water pump by the temperature difference between the cylinder head and the cylinder block; if actual jamming occurs, torque limiting and high-frequency water pump de-jamming are required immediately; if no mechanical jamming occurs, torque limiting is not required, and the water pump performs low-frequency de-jamming; thus reducing the frequency of torque limiting in actual vehicles and improving customer experience.

[0093] Based on the foregoing embodiments, this application provides a pump stall detection device, which can be applied to... Figures 1 to 3 In the corresponding embodiment of the pump stall detection method, refer to Figure 4 As shown, the pump stall detection device 4 may include:

[0094] The reading unit 41 is used to read the cylinder head outlet water temperature and the cylinder block outlet water temperature of the engine that the water pump is acting on after receiving the water pump stall signal.

[0095] Processing unit 42 is used to determine whether the water pump is mechanically stuck based on the outlet water temperature of the cylinder head and the outlet water temperature of the cylinder block.

[0096] In other embodiments of this application, the processing unit 42 is further configured to determine the temperature difference between the cylinder head outlet temperature and the cylinder block outlet temperature when neither the cylinder head outlet temperature nor the cylinder block outlet temperature meets the first temperature threshold; and to determine whether the water pump is mechanically stuck based on the temperature difference.

[0097] In other embodiments of this application, the processing unit 42 is further configured to determine that the water pump is mechanically stuck when the temperature difference meets the sticking condition; and to determine that the water pump is not mechanically stuck when the temperature difference does not meet the sticking condition.

[0098] In other embodiments of this application, the jamming condition includes at least one of the following:

[0099] The temperature difference satisfies the second temperature threshold.

[0100] The temperature difference between the temperature rise of the cylinder head outlet water and the temperature rise of the cylinder block outlet water within the target time period satisfies the third temperature threshold.

[0101] In other embodiments of this application, the processing unit 42 is further configured to activate the torque limiting protection of the transmitter when at least one of the cylinder head outlet water temperature and the cylinder block outlet water temperature meets the first temperature threshold.

[0102] In other embodiments of this application, the processing unit 42 is further configured to activate the torque limiting protection of the transmitter and restart the water pump in the event of mechanical jamming of the water pump.

[0103] In other embodiments of this application, the processing unit 42 is further configured to restart the water pump based on a target frequency if the water pump does not experience mechanical jamming; the target frequency is lower than the frequency used by the water pump during restart.

[0104] It should be noted that a detailed explanation of the steps performed by each unit can be found in [reference needed]. Figures 1 to 3 The implementation process of the pump stall detection method provided in the corresponding embodiment will not be described in detail here.

[0105] The pump stall detection device provided in this application embodiment can determine whether the pump has experienced actual mechanical stall based on the cylinder head outlet temperature and the cylinder block outlet temperature. In the event of actual mechanical stall, the device provides torque limiting protection for the transmitter; in the event that the pump has not experienced mechanical stall, the device does not provide torque limiting protection for the transmitter. This results in fault degradation, reduces torque limiting operations on the transmitter, and reduces the frequency of limp-out.

[0106] Based on the foregoing embodiments, embodiments of this application provide a pump stall detection device, which can be applied to... Figures 1 to 3 In the corresponding embodiment of the pump stall detection method, refer to Figure 5 As shown, the pump stall detection device 5 may include: a processor 51, a memory 52, and a communication bus 53, wherein:

[0107] Communication bus 53 is used to realize the communication connection between processor 51 and memory 52;

[0108] The processor 51 is used to execute the pump stall detection program in the memory 52 to perform the following steps:

[0109] After receiving a water pump failure signal after the water pump stalls, the cylinder head outlet water temperature and the cylinder block outlet water temperature of the engine affected by the water pump are read.

[0110] Based on the outlet water temperature of the cylinder head and the outlet water temperature of the cylinder block, determine whether the water pump is mechanically stuck.

[0111] In other embodiments of this application, the processor 51 is used to execute the water pump stall detection program in the memory 52 to determine whether the water pump is mechanically stuck based on the cylinder head outlet temperature and the cylinder block outlet temperature, in order to achieve the following steps:

[0112] If neither the cylinder head outlet temperature nor the cylinder block outlet temperature meets the first temperature threshold, determine the temperature difference between the cylinder head outlet temperature and the cylinder block outlet temperature.

[0113] Based on the temperature difference, it is determined whether the water pump is mechanically stuck.

[0114] In other embodiments of this application, the processor 51 is used to execute the pump stall detection program in the memory 52 to determine whether the water pump is mechanically stuck based on the temperature difference, in order to achieve the following steps:

[0115] If the temperature difference meets the jamming condition, it is determined that the water pump is mechanically jammed;

[0116] If the temperature difference does not meet the jamming condition, it is determined that the water pump has not experienced mechanical jamming.

[0117] In other embodiments of this application, the jamming condition includes at least one of the following: the temperature difference satisfies a second temperature threshold; the temperature difference between the temperature rise of the cylinder head outlet water temperature and the temperature rise of the cylinder block outlet water temperature during a target time period satisfies a third temperature threshold.

[0118] In other embodiments of this application, the processor 51 is used to execute the pump stall detection program in the memory 52, and can also implement the following steps:

[0119] If at least one of the cylinder head outlet water temperature and the cylinder block outlet water temperature meets the first temperature threshold, the torque limiting protection of the transmitter is activated.

[0120] In other embodiments of this application, the processor 51 is used to execute the pump stall detection program in the memory 52 to perform the following steps:

[0121] In the event of mechanical jamming of the water pump, the torque limiting protection of the transmitter is activated, and the water pump is restarted.

[0122] In other embodiments of this application, the processor 51 is used to execute the pump stall detection program in the memory 52 to perform the following steps:

[0123] If the water pump does not experience mechanical jamming, the water pump is restarted based on a target frequency; the target frequency is lower than the frequency used by the water pump during restart.

[0124] It should be noted that the specific implementation method of the steps executed by the processor can be found in [reference needed]. Figures 1 to 3 The description of the pump stall detection method provided in the corresponding embodiment will not be repeated here.

[0125] The pump stall detection device provided in this application embodiment can determine whether the pump has experienced actual mechanical stall based on the cylinder head outlet temperature and the cylinder block outlet temperature. In the event of actual mechanical stall, the device provides torque limiting protection for the transmitter; in the event that the pump has not experienced mechanical stall, the device does not provide torque limiting protection for the transmitter. This results in fault degradation, reduces torque limiting operations on the transmitter, and reduces the frequency of limp-out.

[0126] Based on the foregoing embodiments, embodiments of this application provide a computer-readable storage medium storing one or more programs, which can be executed by one or more processors to implement... Figures 1 to 3 The steps of the pump stall detection method provided in the corresponding embodiment.

[0127] Those skilled in the art will understand that embodiments of this application can be provided as methods, systems, or computer program products. Therefore, this application can take the form of hardware embodiments, software embodiments, or embodiments combining software and hardware aspects. Furthermore, this application can take the form of a computer program product implemented on one or more computer-usable storage media (including, but not limited to, disk storage and optical storage) containing computer-usable program code.

[0128] This application is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of this application. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart... Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0129] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0130] These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable apparatus for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0131] The above description is merely a preferred embodiment of this application and is not intended to limit the scope of protection of this application.

Claims

1. A method for detecting pump stall, characterized in that, The method includes: After receiving a water pump failure signal after the water pump stalls, the cylinder head outlet water temperature and the cylinder block outlet water temperature of the engine affected by the water pump are read. When both the cylinder head outlet water temperature and the cylinder block outlet water temperature are less than a first temperature threshold, the temperature difference between the cylinder head outlet water temperature and the cylinder block outlet water temperature is determined. Based on the temperature difference, determine whether the water pump is mechanically stuck; The step of determining whether the water pump is mechanically stuck based on the temperature difference includes: If the temperature difference meets the jamming condition, it is determined that the water pump is mechanically jammed; If the temperature difference does not meet the jamming condition, it is determined that the water pump has not mechanically jammed; the jamming condition includes at least one of the following: the temperature difference is greater than or equal to a second temperature threshold, and the temperature difference between the temperature rise of the cylinder head outlet water temperature and the temperature rise of the cylinder block outlet water temperature within the target time period is greater than or equal to a third temperature threshold.

2. The method according to claim 1, characterized in that, The method further includes: If at least one of the cylinder head outlet water temperature and the cylinder block outlet water temperature is greater than or equal to the first temperature threshold, the engine torque limiting protection is activated.

3. The method according to claim 1 or 2, characterized in that, The method further includes: In the event of mechanical jamming of the water pump, the torque limiting protection of the engine is activated, and the water pump is restarted.

4. The method according to claim 3, characterized in that, The method further includes: If the water pump does not experience mechanical jamming, the water pump is restarted based on a target frequency; the target frequency is lower than the frequency used by the water pump during restart.

5. A pump stall detection device, characterized in that, The device includes: The reading unit is used to read the cylinder head outlet water temperature and the cylinder block outlet water temperature of the engine being acted upon by the water pump after receiving a water pump stall signal. The processing unit is configured to determine the temperature difference between the cylinder head outlet temperature and the cylinder block outlet temperature when both the cylinder head outlet temperature and the cylinder block outlet temperature are less than a first temperature threshold; and based on the temperature difference, determine whether the water pump is mechanically stuck. The processing unit is further configured to determine that the water pump is mechanically jammed when the temperature difference meets the jamming condition; and to determine that the water pump is not mechanically jammed when the temperature difference does not meet the jamming condition; the jamming condition includes at least one of the following: the temperature difference is greater than or equal to a second temperature threshold, and the temperature difference between the temperature rise of the cylinder head outlet water temperature and the temperature rise of the cylinder block outlet water temperature within the target time period is greater than or equal to a third temperature threshold.

6. A pump stall detection device, characterized in that, The device includes: a processor, a memory, and a communication bus; The communication bus is used to realize the communication connection between the processor and the memory; The processor is used to execute the pump stall detection program in the memory to implement the steps of the pump stall detection method as described in any one of claims 1 to 4.

7. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores one or more programs, which can be executed by one or more processors to implement the steps of the pump stall detection method as described in any one of claims 1 to 4.

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