Vehicle four-way valve fault diagnosis method, device and equipment and storage medium

Abstract

The invention discloses a vehicle four-way valve fault diagnosis method, device and equipment and a storage medium, and the method comprises the steps: calculating the temperature difference between the front end and the rear end of a four-way valve according to a first water temperature at the front end of the vehicle four-way valve and a second water temperature at the rear end of the vehicle four-way valve, which are respectively obtained; and according to the running state change of the cooling fan and the first water temperature and the temperature difference, the working state of the vehicle four-way valve is comprehensively judged so that fault diagnosis can be conducted on a four-way valve body, and the working state at least comprises the normal working state and the closed clamping stagnation state. Whether the vehicle four-way valve body breaks down or not can be accurately diagnosed, the accuracy of fault diagnosis is improved, meanwhile, the risk that parts are damaged due to the fact that vehicle abnormity is not perceived in time is avoided, and driving safety is guaranteed.

Description

Technical Field

[0001] This invention relates to the field of vehicle testing technology, and in particular to a method, apparatus, equipment and storage medium for diagnosing faults in a vehicle four-way valve. Background Technology

[0002] With the rapid development of the new energy vehicle industry, the complexity and importance of the vehicle's thermal management system are becoming increasingly prominent. As one of the core actuators of the thermal management system, the four-way valve is responsible for switching the coolant circulation path under different operating conditions to achieve efficient heat dissipation or insulation of key components such as the motor, electronic control system, and battery. Its reliability directly affects the performance, safety, and service life of the entire vehicle.

[0003] Current technologies commonly employ offline disassembly and observation methods, and diagnostic tool testing methods. Observation methods are complex, requiring specialized tools and skills, and can easily damage vehicle components during disassembly, posing safety risks. Furthermore, they can only inspect the static appearance and basic functions of the four-way valve, failing to simulate actual operating temperatures and conditions, making it difficult to determine whether the four-way valve will malfunction by sticking shut at specific temperatures. Diagnostic tool testing methods can only detect circuit-related faults in the four-way valve. They cannot accurately locate and diagnose internal mechanical faults such as stuck valve cores or poor sealing, making it difficult for repair personnel to quickly and accurately determine the cause of the fault, increasing repair costs and time.

[0004] Therefore, how to accurately diagnose the working status of the four-way valve body without disassembling the components, so as to improve the efficiency of fault diagnosis, ensure the safety of vehicle operation and reduce maintenance costs, is a technical problem that urgently needs to be solved. Summary of the Invention

[0005] The main objective of this invention is to provide a method, device, equipment, and storage medium for diagnosing vehicle four-way valve faults. This method can accurately diagnose whether the four-way valve body is faulty, improving the accuracy of fault diagnosis and avoiding the risk of component damage due to failure to detect vehicle abnormalities in time, thus ensuring driving safety.

[0006] In a first aspect, this application provides a method for diagnosing a fault in a vehicle four-way valve, wherein the method includes the following steps: Calculate the temperature difference between the front and rear ends of the four-way valve based on the first water temperature at the front end of the four-way valve and the second water temperature at the rear end of the four-way valve. Based on the changes in the operating status of the cooling fan and the first water temperature and temperature difference, the working status of the vehicle's four-way valve is comprehensively judged in order to diagnose the fault of the four-way valve body. The working status includes at least: normal working status and closed stuck status.

[0007] In conjunction with the first aspect above, as an optional implementation, if the first water temperature reaches the target temperature when the four-way valve is opened, and the temperature difference is less than the first threshold, and the cooling fan is running at the first set speed when it is turned on, then it is determined that the vehicle's four-way valve is in normal working condition. If the first water temperature reaches the set temperature, and the temperature difference is greater than or equal to the second threshold, and the operating state of the cooling fan smoothly transitions from the first set speed to the second set speed when the fan is turned on, then it is determined that the vehicle's four-way valve is in a closed and stuck state.

[0008] In conjunction with the first aspect mentioned above, as an optional implementation method, the vehicle is kept in an ignition state, and the operating pattern of the cooling fan is detected; If the cooling fan is found to maintain its speed at the first set speed within a set time period, then the vehicle's four-way valve is determined to be in normal working condition. If the cooling fan's operating pattern is detected to be a smooth transition from high to low speed within a set time period, then it is determined that the four-way valve has a closure jamming fault.

[0009] In conjunction with the first aspect mentioned above, as an optional implementation, if the first temperature continues to be higher than the set water temperature range and the cooling fan is at the first preset speed, and the detected water temperature does not show a decreasing trend, then it is determined that the internal seal of the four-way valve is damaged. If the cooling fan speed is detected to be abnormal, and it is confirmed that the four-way valve body is not stuck in the closing position, and the water temperature is detected to be below the set range or above the set upper limit, then it is determined that the pilot valve is faulty. If the temperature difference exhibits irregular and abnormal fluctuations, and the problems of stuck shut-off, pilot valve damage, and seal damage have been ruled out, then the four-way valve is determined to have a blockage caused by impurities.

[0010] In conjunction with the first aspect mentioned above, as an optional implementation method, corresponding graded voice prompts are triggered based on the determined working state of the four-way valve.

[0011] In conjunction with the first aspect mentioned above, as an optional implementation method, if the water temperature is detected to gradually rise and approach the set upper temperature limit during vehicle operation, a temperature rise alarm will be broadcast. If the real-time water temperature reaches or exceeds the set upper temperature limit, a high temperature alarm will be broadcast. If the water temperature gradually decreases and approaches the set lower limit in real time, a cooling alarm will be broadcast; If the real-time water temperature is detected to be lower than the set lower limit, a low temperature alarm will be broadcast.

[0012] In conjunction with the first aspect mentioned above, as an optional implementation, the first water temperature TT1 at the front end of the vehicle's four-way valve and the second water temperature TT1 at the rear end of the vehicle's four-way valve are obtained by using the ECT temperature sensor E1 of the cooling system at the front end of the four-way valve and the ECT temperature sensor E2 of the cooling system at the rear end of the four-way valve. Calculate the temperature difference between the front and rear ends of the four-way valve using the formula: △T=|TT1 - TT2|.

[0013] Secondly, this application provides a vehicle four-way valve fault diagnosis device, the device comprising: The processing module is used to calculate the temperature difference between the front and rear ends of the four-way valve based on the first water temperature at the front end of the four-way valve and the second water temperature at the rear end of the four-way valve. The diagnostic module is used to comprehensively determine the working status of the vehicle's four-way valve based on the changes in the operating status of the cooling fan and the first water temperature and temperature difference, so as to perform fault diagnosis on the four-way valve body. The working status includes at least: normal working status and closed stuck status.

[0014] Thirdly, this application also provides an electronic device, the electronic device comprising: a processor; and a memory storing computer-readable instructions, which, when executed by the processor, implement the method described in any one of the first aspects.

[0015] Fourthly, this application also provides a computer-readable storage medium storing computer program instructions that, when executed by a computer, cause the computer to perform the method described in any of the first aspects.

[0016] This application provides a method, apparatus, device, and storage medium for diagnosing faults in a vehicle four-way valve. The method includes the following steps: calculating the temperature difference between the front and rear ends of the four-way valve based on a first water temperature at the front end and a second water temperature at the rear end; and comprehensively judging the operating state of the four-way valve based on changes in the cooling fan's operating status, the first water temperature, and the temperature difference, to diagnose faults in the four-way valve body. The operating state includes at least two conditions: normal operation and a closed / stuck state. This application can accurately diagnose whether the vehicle's four-way valve body is faulty, improving the accuracy of fault diagnosis and avoiding the risk of component damage due to failure to detect vehicle abnormalities in a timely manner, thus ensuring driving safety.

[0017] It should be understood that the above general description and the following detailed description are merely exemplary and do not limit the invention. Attached Figure Description

[0018] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0019] Figure 1 This is a flowchart of a vehicle four-way valve fault diagnosis method provided in the embodiments of this application; Figure 2 This is a schematic diagram of a vehicle four-way valve fault diagnosis device provided in the embodiments of this application; Figure 3 This is a schematic diagram of an electronic device provided in an embodiment of this application; Figure 4 This is a schematic diagram of a computer-readable program medium provided in an embodiment of this application. Detailed Implementation

[0020] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Rather, they are merely examples of apparatuses and methods consistent with some aspects of the invention as detailed in the appended claims.

[0021] Furthermore, the accompanying drawings are merely illustrative of this disclosure and are not necessarily drawn to scale. Some of the block diagrams shown in the drawings represent functional entities and do not necessarily correspond to physically or logically independent entities.

[0022] The embodiments of this application will be further described in detail below with reference to the accompanying drawings.

[0023] Reference Figure 1 , Figure 1 The diagram shown is a flowchart of a vehicle four-way valve fault diagnosis method provided by the present invention. Figure 1 As shown, the method includes the following steps: Step S101: Calculate the temperature difference between the front and rear ends of the four-way valve based on the first water temperature at the front end of the four-way valve and the second water temperature at the rear end of the four-way valve.

[0024] Specifically, the first water temperature TT1 at the front end of the vehicle's four-way valve and the second water temperature TT1 at the rear end of the vehicle's four-way valve are obtained by using the ECT temperature sensor E1 of the cooling system at the front end of the four-way valve and the ECT temperature sensor E2 of the cooling system at the rear end of the four-way valve. Calculate the temperature difference between the front and rear ends of the four-way valve using the formula: △T=|TT1 - TT2|.

[0025] Specifically, the fan on the vehicle needs to be calibrated to two states: low speed and high speed. And the vehicle cooling system should be equipped with at least two ECT sensors, namely the ECT sensor E1 at the front end of the four-way valve cooling system and the ECT sensor E2 at the rear end of the cooling system. The vehicle also needs to be equipped with a voice prompt module, which is connected to the VCU and receives instructions from the VCU to make voice announcements.

[0026] Definition of temperature difference: Define the temperature difference △T = |TT1 - TT2|, where TT1 is the temperature (coolant temperature) detected by the ECT sensor E1 at the front end of the four-way valve cooling system, and TT2 is the temperature detected by the ECT sensor E2 at the rear end of the four-way valve cooling system.

[0027] Step S102: Based on the change in the operating state of the cooling fan and the first water temperature and the temperature difference, comprehensively judge the working state of the vehicle four-way valve to conduct a fault diagnosis on the four-way valve body. The working state at least includes: normal working state and closed and stuck state.

[0028] Specifically, if it is detected that the first water temperature reaches the target temperature when the four-way valve opens, and the temperature difference is less than the first threshold, and the operating state when the cooling fan is turned on is the first set speed, then it is determined that the vehicle four-way valve is in the normal working state; If it is detected that the first water temperature reaches the set temperature, and the temperature difference is greater than or equal to the second threshold, and the operating state when the cooling fan is turned on smoothly transitions from the first set speed to the second set speed, then it is determined that the vehicle four-way valve is in the closed and stuck state.

[0029] For easy understanding, an example is given to illustrate the normal working determination strategy: When the water temperature TT1 reaches the target temperature when the four-way valve opens (for example, 90°C, which can be adjusted according to the actual vehicle model and the characteristics of the four-way valve), and △T < t0 (the value range of t0 is [0, x], x is, for example, 4°C, which can be floatingly calibrated according to the target temperature when the specific four-way valve opens), at this time, it is detected that the fan is running at high speed, then it is determined that the four-way valve is in the normal working state. At the same time, if the water temperature is within the normal range (for example, the set normal water temperature range is 70°C - 95°C), the voice prompt module does not give water temperature-related prompts. It can be understood that after judging that the water temperature and temperature difference meet the conditions, the cooling fan is turned on to detect whether the fan speed is in the high-speed state (high speed means greater than the set speed). If so, it is determined that the four-way valve is normal.

[0030] The strategy for determining if the cooling system is stuck is as follows: When the water temperature TT1 reaches a certain temperature (e.g., 90℃), and △T≥t1 (t1 ranges from (x,+∞), where x can be calibrated based on the target temperature at which the four-way valve opens), the system detects a smooth transition between the high-speed and low-speed fan. The transition time can be calibrated according to the actual strategy. At this point, the voice prompt module issues a voice prompt: "An abnormality has been detected in the vehicle's cooling system. The four-way valve is stuck. Please stop the vehicle as soon as possible and check for any changes in water temperature." This means that after the water temperature and temperature difference conditions are met, the fan is turned on to check if the fan smoothly transitions from high to low speed. If so, the system is determined to be stuck.

[0031] Optionally, the vehicle is kept in ignition mode, and the operation of the cooling fan is monitored. If the cooling fan speed remains at the set speed within a set time period, the four-way valve is considered to be operating normally. If the cooling fan speed smoothly transitions from high to low within the set time period, the four-way valve is considered to have a closing jamming fault. This can be understood as follows: after the vehicle is in control mode, the hood is opened to observe the fan's operation. If the fan runs at high speed for an extended period, it indicates that the four-way valve is operating normally; if the fan speed smoothly transitions from high to low, it indicates that the four-way valve has a closing jamming fault.

[0032] In one embodiment, temperature and time calibration: After the vehicle has traveled a certain distance, the water temperature will continue to rise and reach near the calibrated temperature (e.g., 90°C). Without damaging the motor, electronic control system, and battery, the duration t of the entire heating process can be calibrated based on the time it takes for the engine to heat up from its initial temperature to the opening of the four-way valve.

[0033] In one embodiment, the failure state of the four-way valve is determined, and the failure state includes: damage to the internal seal of the four-way valve, pilot valve failure, and blockage by impurities, which includes: If the first temperature continues to be higher than the set water temperature range, and the cooling fan is at the first preset speed, and the detected water temperature does not show a decreasing trend, then it is determined that the internal seal of the four-way valve is damaged. If the cooling fan speed is detected to be abnormal, and it is confirmed that the four-way valve body is not stuck in the closing position, and the water temperature is detected to be below the set range or above the set upper limit, then it is determined that the pilot valve is faulty. If the temperature difference exhibits irregular and abnormal fluctuations, and the problems of stuck shut-off, pilot valve damage, and seal damage have been ruled out, then the four-way valve is determined to have a blockage caused by impurities.

[0034] For ease of understanding and illustration, the following are additional reasons for failure: Besides jamming during closure, the four-way valve may also fail due to the following reasons: Internal seal damage: Over long-term use, the internal seals of the four-way valve are affected by high temperature, high pressure, and chemical corrosion from the coolant, leading to aging and wear. This results in decreased sealing performance and refrigerant or coolant leakage, affecting the normal operation of the cooling system. If the system temperature cannot be effectively reduced even when the fan is running at high speed, and other heat dissipation component malfunctions have been ruled out, this cause should be considered. In this case, if the water temperature exceeds the upper limit of the normal range (e.g., 95℃), the voice prompt module will indicate: "Vehicle water temperature is too high; the internal seals of the four-way valve may be damaged. Please drive cautiously and have it repaired as soon as possible." Pilot valve malfunction: The pilot valve controls the movement of the main spool valve. If the pilot valve solenoid coil is short-circuited, open-circuited, or the valve core is stuck, the pilot valve will not function properly, preventing the main spool valve from switching. For example, if the solenoid coil is short-circuited, the pilot valve will not operate normally, the main spool valve will be in a fixed position, affecting the four-way valve function. If the fan is operating abnormally and the four-way valve body does not have a problem with closing or jamming, the pilot valve needs to be checked. When a pilot valve malfunction causes abnormal water temperature (e.g., water temperature below the lower limit of the normal range of 70℃ or above the upper limit of 95℃), the voice prompt module will indicate: "Vehicle cooling system malfunction, suspected four-way valve pilot valve malfunction, please pay attention to water temperature and have it repaired promptly." Impurities causing blockage: Metal shavings, scale, and other impurities in the cooling system may enter the four-way valve, clogging the passage or affecting valve core movement. These impurities may originate from component wear or coolant deterioration. If the temperature fluctuations are large and irregular, after ruling out other common faults, consider the possibility of impurities causing the abnormal water temperature. When it is determined that impurities causing the abnormal water temperature is a possibility, the voice prompt module will indicate: "There may be an impurity blockage in the vehicle's cooling system, resulting in abnormal water temperature. Please monitor the water temperature and address the issue as soon as possible." In one embodiment, the working status of the vehicle's four-way valve is comprehensively determined based on the changes in the operating status of the cooling fan and the first water temperature and temperature difference. After diagnosing the fault of the four-way valve body, the process includes: triggering corresponding graded voice prompt information based on the determined working status of the four-way valve.

[0035] Optionally, during vehicle operation, if the real-time detected water temperature gradually rises and approaches the set upper temperature limit, a temperature rise alarm will be broadcast; if the real-time detected water temperature reaches or exceeds the set upper temperature limit, a high temperature alarm will be broadcast; if the real-time detected water temperature gradually decreases and approaches the set lower temperature limit, a temperature drop alarm will be broadcast; if the real-time detected water temperature is below the set lower temperature limit, a low temperature alarm will be broadcast.

[0036] To illustrate the logic of the coolant temperature change warning, the voice prompt module will provide alerts based on the temperature changes during vehicle operation, regardless of whether the four-way valve is malfunctioning. When the coolant temperature gradually rises and approaches the upper limit of 95℃, it will prompt, "Coolant temperature is rising, approaching high temperature warning, please pay attention to vehicle condition"; when the coolant temperature reaches or exceeds 95℃, it will prompt, "Coolant temperature is too high, posing a safety risk, please stop immediately and check"; when the coolant temperature gradually decreases and approaches the lower limit of 70℃, it will prompt, "Coolant temperature is decreasing, approaching low temperature range, please pay attention to vehicle condition"; when the coolant temperature is below 70℃, it will prompt, "Coolant temperature is too low, which may affect vehicle performance, please warm up the engine appropriately."

[0037] Furthermore, regarding fan speed control, in addition to setting low and high speeds, multi-speed adjustment can be considered. Based on real-time data of water temperature changes and temperature differences, the fan can be precisely controlled to switch between different speed levels. This allows for more precise adjustment of the cooling system's heat dissipation capacity, further improving the accuracy of fault diagnosis and system stability. For example, when the water temperature is close to the target opening temperature of the four-way valve and the temperature difference is small, the fan operates at a lower, intermediate speed; as the water temperature continues to rise or the temperature difference increases, the fan gradually switches to a higher speed level. This finer control of fan speed provides more comprehensive data support for four-way valve fault diagnosis.

[0038] Regarding voice prompts, in addition to using fixed voice prompts, an intelligent voice interaction system can be developed. This system can generate personalized voice prompts based on factors such as the specific vehicle malfunction, the driver's operating habits, and real-time traffic conditions, providing more accurate and user-friendly services. For example, when a vehicle is driving on a highway and the coolant temperature is approaching a high-temperature warning, the voice prompt will include information suggesting the driver stop at the nearest service area for inspection.

[0039] For the sensors, fans, voice prompt modules, and related control modules involved in this invention, manufacturing processes can be optimized to improve product quality and reliability. For example, in sensor manufacturing, more advanced microelectromechanical processing (MEMS) techniques can be employed to improve the sensor's temperature measurement accuracy and response speed. For fans, improved motor manufacturing processes reduce noise and energy consumption during operation, while enhancing stability under different operating conditions. In voice prompt module manufacturing, high-fidelity audio chips and optimized speech synthesis algorithms are selected to ensure clear and accurate voice prompts. In control module manufacturing, surface mount technology (SMT) and multilayer circuit board design are used to improve circuit board integration and anti-interference capabilities, ensuring accurate execution of control logic. Furthermore, in the product assembly stage, automated assembly lines can be introduced to improve production efficiency and assembly accuracy, ensuring consistent product quality.

[0040] Understandably, this application, based on the precise logical control relationship between water temperature, temperature difference, and fan speed, comprehensively considers various possible failure causes of the four-way valve and their judgment methods, and integrates vehicle voice prompt function and water temperature change prompt logic. By reasonably setting the temperature difference threshold between the front and rear ends of the four-way valve, the fan speed switching strategy, the voice prompt triggering conditions, and the correlation with water temperature, accurate judgment of the four-way valve's working status and timely reminders to the driver are achieved. In other words, this application installs two temperature sensors in the vehicle's cooling system, one before and one after the four-way valve. By comparing the temperature difference between these two locations, combined with the change in the car's radiator fan speed, it is possible to determine whether the four-way valve is working properly. If the four-way valve is stuck and not working, the temperature difference between these two locations will increase, and the fan's operating mode will also change. Repair personnel do not need to disassemble the parts; they only need to observe the fan's operation to diagnose the fault. At the same time, when the water temperature is abnormal, the vehicle will remind the driver to pay attention to the water temperature change via voice, avoiding vehicle damage due to failure to detect water temperature problems in time. The entire method can achieve accurate and safe fault diagnosis without modifying the original structure of the vehicle.

[0041] In summary, the beneficial effects of this application include: Precise fault diagnosis: By precisely setting the logical relationship between water temperature, temperature difference and fan speed, it can accurately determine whether the four-way valve is in a closed and stuck state when the OBD system cannot report the correct code. At the same time, it can also find other potential causes of failure, which greatly improves the accuracy of fault diagnosis and reduces the occurrence of misdiagnosis and missed diagnosis.

[0042] Simple and safe to operate: No need to disassemble the four-way valve, fault diagnosis can be made simply by observing the fan's operating status, avoiding complicated disassembly operations, reducing the operational difficulty and safety risks for maintenance personnel, and reducing the potential damage to vehicle parts caused by disassembly.

[0043] Enhanced driving safety: The vehicle's voice prompt function enables drivers to be aware of changes in water temperature in a timely manner, and to take timely measures when the four-way valve malfunctions or the water temperature is abnormal, so as to avoid damage to vehicle parts due to failure to detect the problem in time and ensure driving safety.

[0044] High compatibility: It does not change the existing cooling system and the overall layout of the vehicle, and can be directly applied to existing new energy vehicle models, reducing the cost of technology upgrades and modifications, and has good market promotion value.

[0045] Improved maintenance efficiency: Quickly and accurately pinpointing the cause of a malfunction shortens vehicle repair time, reduces repair costs, and improves vehicle utilization and customer satisfaction.

[0046] Reference Figure 2 , Figure 2 The diagram shown is a schematic of a vehicle four-way valve fault diagnosis device provided by the present invention. Figure 2 As shown, the device includes: Processing module 201: It is used to calculate the temperature difference between the front and rear ends of the four-way valve based on the first water temperature at the front end of the vehicle four-way valve and the second water temperature at the rear end of the vehicle four-way valve.

[0047] Diagnostic module 202: It is used to comprehensively judge the working status of the vehicle four-way valve based on the changes in the operating status of the cooling fan and the first water temperature and temperature difference, so as to perform fault diagnosis on the four-way valve body. The working status includes at least: normal working status and closed stuck status.

[0048] Furthermore, in one possible implementation, the diagnostic module is also used to determine that the vehicle's four-way valve is in normal working condition if the detected first water temperature reaches the target temperature when the four-way valve is opened, and the temperature difference is less than a first threshold, and the operating state of the cooling fan when it is turned on is a first set speed. If the first water temperature reaches the set temperature, and the temperature difference is greater than or equal to the second threshold, and the operating state of the cooling fan smoothly transitions from the first set speed to the second set speed when the fan is turned on, then it is determined that the vehicle's four-way valve is in a closed and stuck state.

[0049] Furthermore, in one possible implementation, the diagnostic module is also used to control the vehicle to be in an ignition state and to detect the operating pattern of the cooling fan; If the cooling fan is found to maintain its speed at the first set speed within a set time period, then the vehicle's four-way valve is determined to be in normal working condition. If the cooling fan's operating pattern is detected to be a smooth transition from high to low speed within a set time period, then it is determined that the four-way valve has a closure jamming fault.

[0050] Furthermore, in one possible implementation, the diagnostic module is also used to determine that the internal seal of the four-way valve is damaged if the first temperature continues to be higher than the set water temperature range and the cooling fan is at the first preset speed and the water temperature does not show a decreasing trend. If the cooling fan speed is detected to be abnormal, and it is confirmed that the four-way valve body is not stuck in the closing position, and the water temperature is detected to be below the set range or above the set upper limit, then it is determined that the pilot valve is faulty. If the temperature difference exhibits irregular and abnormal fluctuations, and the problems of stuck shut-off, pilot valve damage, and seal damage have been ruled out, then the four-way valve is determined to have a blockage caused by impurities.

[0051] Furthermore, in one possible implementation, the diagnostic module is also used to trigger corresponding graded voice prompts based on the determined working status of the four-way valve.

[0052] Furthermore, in one possible implementation, the diagnostic module is also used to issue a temperature rise alarm if the water temperature gradually rises and approaches the set upper temperature limit during vehicle operation. If the real-time water temperature reaches or exceeds the set upper temperature limit, a high temperature alarm will be broadcast. If the water temperature gradually decreases and approaches the set lower limit in real time, a cooling alarm will be broadcast; If the real-time water temperature is detected to be lower than the set lower limit, a low temperature alarm will be broadcast.

[0053] Furthermore, in one possible implementation, the processing module is also used to acquire the first water temperature TT1 at the front end of the vehicle four-way valve and the second water temperature TT1 at the rear end of the vehicle four-way valve using the ECT temperature sensor E1 of the cooling system at the front end of the four-way valve and the ECT temperature sensor E2 of the cooling system at the rear end of the four-way valve, respectively. Calculate the temperature difference between the front and rear ends of the four-way valve using the formula: △T=|TT1 - TT2|.

[0054] The following reference Figure 3 To describe an electronic device 300 according to this embodiment of the present invention. Figure 3 The electronic device 300 shown is merely an example and should not impose any limitations on the functionality and scope of use of the embodiments of the present invention.

[0055] like Figure 3 As shown, the electronic device 300 is presented in the form of a general-purpose computing device. The components of the electronic device 300 may include, but are not limited to: at least one processing unit 310, at least one storage unit 320, and a bus 330 connecting different system components (including storage unit 320 and processing unit 310).

[0056] The storage unit stores program code that can be executed by the processing unit 310, causing the processing unit 310 to perform the steps described in the "Embodiment Methods" section of this specification according to various exemplary embodiments of the present invention.

[0057] Storage unit 320 may include readable media in the form of volatile storage units, such as random access memory (RAM) 321 and / or cache memory 322, and may further include read-only memory (ROM) 323.

[0058] Storage unit 320 may also include a program / utility 324 having a set (at least one) of program modules 325, such program modules 325 including but not limited to: an operating system, one or more application programs, other program modules and program data, each of these examples or some combination thereof may include an implementation of a network environment.

[0059] Bus 330 can represent one or more of several types of bus structures, including a memory cell bus or memory cell controller, a peripheral bus, a graphics acceleration port, a processing unit, or a local bus using any of the various bus structures.

[0060] Electronic device 300 can also communicate with one or more external devices (e.g., keyboard, pointing device, Bluetooth device, etc.), one or more devices that enable a user to interact with electronic device 300, and / or any device that enables electronic device 300 to communicate with one or more other computing devices (e.g., router, modem, etc.). This communication can be performed via input / output (I / O) interface 350. Furthermore, electronic device 300 can also communicate with one or more networks (e.g., local area network (LAN), wide area network (WAN), and / or public networks, such as the Internet) via network adapter 360. As shown, network adapter 360 communicates with other modules of electronic device 300 via bus 330. It should be understood that, although not shown in the figures, other hardware and / or software modules can be used in conjunction with electronic device 300, including but not limited to: microcode, device drivers, redundant processing units, external disk drive arrays, RAID systems, tape drives, and data backup storage systems.

[0061] From the above description of the embodiments, those skilled in the art will readily understand that the exemplary embodiments described herein can be implemented by software or by combining software with necessary hardware. Therefore, the technical solutions according to the embodiments of this disclosure can be embodied in the form of a software product, which can be stored in a non-volatile storage medium (such as a CD-ROM, USB flash drive, external hard drive, etc.) or on a network, including several instructions to cause a computing device (such as a personal computer, server, terminal device, or network device, etc.) to execute the methods according to the embodiments of this disclosure.

[0062] According to the present disclosure, a computer-readable storage medium is also provided, on which a program product capable of implementing the methods described above is stored. In some possible embodiments, various aspects of the present invention can also be implemented as a program product comprising program code that, when the program product is run on a terminal device, causes the terminal device to perform the steps of the various exemplary embodiments of the present invention described in the "Exemplary Methods" section above.

[0063] refer to Figure 4 As shown, a program product 400 for implementing the above-described method according to an embodiment of the present invention is described. This product may employ a portable compact disc read-only memory (CD-ROM) and include program code, and may run on a terminal device, such as a personal computer. However, the program product of the present invention is not limited thereto. In this document, the readable storage medium may be any tangible medium containing or storing a program that may be used by or in conjunction with an instruction execution system, apparatus, or device.

[0064] The program product may employ any combination of one or more readable media. A readable medium may be a readable signal medium or a readable storage medium. A readable storage medium may be, for example, but not limited to, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination thereof. More specific examples of readable storage media (a non-exhaustive list) include: an electrical connection having one or more wires, a portable disk, a hard disk, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fiber, portable compact disk read-only memory (CD-ROM), optical storage devices, magnetic storage devices, or any suitable combination thereof.

[0065] Computer-readable signal media may include data signals propagated in baseband or as part of a carrier wave, carrying readable program code. Such propagated data signals may take various forms, including but not limited to electromagnetic signals, optical signals, or any suitable combination thereof. A readable signal medium may also be any readable medium other than a readable storage medium, capable of sending, propagating, or transmitting programs for use by or in conjunction with an instruction execution system, apparatus, or device.

[0066] The program code contained on the readable medium may be transmitted using any suitable medium, including but not limited to wireless, wired, optical fiber, RF, etc., or any suitable combination thereof.

[0067] Program code for performing the operations of this invention can be written in any combination of one or more programming languages, including object-oriented programming languages ​​such as Java and C++, and conventional procedural programming languages ​​such as C or similar languages. The program code can execute entirely on the user's computing device, partially on the user's device, as a standalone software package, partially on the user's computing device and partially on a remote computing device, or entirely on a remote computing device or server. In cases involving remote computing devices, the remote computing device can be connected to the user's computing device via any type of network, including a local area network (LAN) or a wide area network (WAN), or it can be connected to an external computing device (e.g., via the Internet using an Internet service provider).

[0068] Furthermore, the above figures are merely illustrative of the processes included in the method according to exemplary embodiments of the present invention, and are not intended to be limiting. It is readily understood that the processes shown in the above figures do not indicate or limit the temporal order of these processes. Additionally, it is readily understood that these processes may be executed synchronously or asynchronously, for example, in multiple modules.

[0069] The above description is merely a specific embodiment of this application, enabling those skilled in the art to understand or implement this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

[0070] This invention is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. 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 illustrations and / or block diagrams. Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

Claims

1. A method for diagnosing faults in a vehicle four-way valve, characterized in that, include: Calculate the temperature difference between the front and rear ends of the four-way valve based on the first water temperature at the front end of the four-way valve and the second water temperature at the rear end of the four-way valve. Based on the changes in the operating status of the cooling fan and the first water temperature and temperature difference, the working status of the vehicle's four-way valve is comprehensively judged in order to diagnose the fault of the four-way valve body. The working status includes at least: normal working status and closed stuck status.

2. The method according to claim 1, characterized in that, The step of comprehensively judging the working status of the vehicle's four-way valve based on changes in the operating status of the cooling fan and the first water temperature and temperature difference includes: If the first water temperature reaches the target temperature when the four-way valve is opened, and the temperature difference is less than the first threshold, and the cooling fan is running at the first set speed when it is turned on, then it is determined that the vehicle's four-way valve is in normal working condition. If the first water temperature reaches the set temperature, and the temperature difference is greater than or equal to the second threshold, and the operating state of the cooling fan smoothly transitions from the first set speed to the second set speed when the fan is turned on, then it is determined that the vehicle's four-way valve is in a closed and stuck state.

3. The method according to claim 2, characterized in that, Also includes: Control the vehicle to be in ignition state and monitor the operation of the cooling fan; If the cooling fan is found to maintain its speed at the first set speed within a set time period, then the vehicle's four-way valve is determined to be in normal working condition. If the cooling fan's operating pattern is detected to be a smooth transition from high to low speed within a set time period, then it is determined that the four-way valve has a closure jamming fault.

4. The method according to claim 1, characterized in that, It also includes the determination of the failure status of the four-way valve, which includes: damage to the internal seals of the four-way valve, pilot valve failure, and blockage by impurities, among which: If the first temperature continues to be higher than the set water temperature range, and the cooling fan is at the first preset speed, and the detected water temperature does not show a decreasing trend, then it is determined that the internal seal of the four-way valve is damaged. If the cooling fan speed is detected to be abnormal, and it is confirmed that the four-way valve body is not stuck in the closing position, and the water temperature is detected to be below the set range or above the set upper limit, then it is determined that the pilot valve is faulty. If the temperature difference exhibits irregular and abnormal fluctuations, and the problems of stuck shut-off, pilot valve damage, and seal damage have been ruled out, then the four-way valve is determined to have a blockage caused by impurities.

5. The method according to claim 1, characterized in that, The step of comprehensively judging the working status of the vehicle's four-way valve based on changes in the operating status of the cooling fan and the first water temperature and temperature difference, and then diagnosing the fault of the four-way valve body, includes: Based on the determined working status of the four-way valve, the corresponding graded voice prompt information is triggered.

6. The method according to claim 5, characterized in that, Also includes: If the water temperature gradually rises and approaches the set upper limit while the vehicle is in motion, a temperature rise alarm will be broadcast. If the real-time water temperature reaches or exceeds the set upper temperature limit, a high temperature alarm will be broadcast. If the water temperature gradually decreases and approaches the set lower limit in real time, a cooling alarm will be broadcast; If the real-time water temperature is detected to be lower than the set lower limit, a low temperature alarm will be broadcast.

7. The method according to claim 1, characterized in that, The step of calculating the temperature difference between the two ends of the four-way valve based on the first water temperature at the front end of the four-way valve and the second water temperature at the rear end of the four-way valve includes: The first water temperature TT1 at the front end of the vehicle's four-way valve and the second water temperature TT1 at the rear end of the vehicle's four-way valve are obtained by using the ECT temperature sensor E1 of the cooling system at the front end of the four-way valve and the ECT temperature sensor E2 of the cooling system at the rear end of the four-way valve, respectively. Calculate the temperature difference between the front and rear ends of the four-way valve using the formula: △T=|TT1 - TT2|.

8. A vehicle four-way valve fault diagnosis device, characterized in that, include: The processing module is used to calculate the temperature difference between the front and rear ends of the four-way valve based on the first water temperature at the front end of the four-way valve and the second water temperature at the rear end of the four-way valve. The diagnostic module is used to comprehensively determine the working status of the vehicle's four-way valve based on the changes in the operating status of the cooling fan and the first water temperature and temperature difference, so as to perform fault diagnosis on the four-way valve body. The working status includes at least: normal working status and closed stuck status.

9. An electronic device, characterized in that, The electronic device includes: processor; A memory storing computer-readable instructions that, when executed by the processor, implement the method as described in any one of claims 1 to 7.

10. A computer-readable storage medium, characterized in that, It stores computer program instructions that, when executed by a computer, cause the computer to perform the method according to any one of claims 1 to 7.

Images