Thermostat sticking diagnosis method and device, electronic equipment and vehicle

Abstract

The application provides a thermostat sticking diagnosis method and device, electronic equipment and vehicle. The method comprises the following steps: obtaining a first radiator outlet water temperature measurement value when the engine is cold started; obtaining a second radiator outlet water temperature measurement value and an engine outlet water temperature measurement value after the engine is cold started for a preset time length; and performing thermostat sticking diagnosis according to the first radiator outlet water temperature measurement value, the second radiator outlet water temperature measurement value and the engine outlet water temperature measurement value. According to the application, thermostat sticking diagnosis can be realized only according to temperature measurement values, without calibration temperature values, so that the false alarm problem of thermostat sticking failure caused by calibration temperature is avoided.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of vehicles, and in particular to a thermostat sticking diagnosis method and device, an electronic device, and a vehicle. BACKGROUND

[0002] A thermostat is a valve that controls the flow path of coolant and is an automatic temperature regulating device that usually contains a temperature sensing component. The thermostat can adjust the heat dissipation capacity of the engine cooling system to ensure that the engine operates within an appropriate temperature range. The thermostat must be in good condition, otherwise it will seriously affect the normal operation of the engine. For example, if the main valve of the thermostat opens too late, the engine will overheat, and if the main valve of the thermostat opens too early, the engine preheating time will be prolonged, and the engine temperature will be too low. In order to ensure the normal operation of the automobile engine, it is necessary to detect whether the thermostat has a sticking fault.

[0003] Currently, the diagnosis of thermostat sticking is usually determined according to the difference between the calibrated engine outlet water temperature and the actual engine outlet water temperature. This method requires that the calibrated engine outlet water temperature be accurate. However, there are many parameters to be considered in the calibration of the engine outlet water temperature, and the calibration process is complicated and prone to errors, resulting in false positives of thermostat sticking faults. SUMMARY

[0004] The embodiments of the present application provide a thermostat sticking diagnosis method, device, electronic device, and vehicle to solve the problem of false positives of thermostat sticking faults caused by using calibrated engine outlet water temperature for thermostat sticking diagnosis in the prior art.

[0005] In a first aspect, the embodiments of the present application provide a thermostat sticking diagnosis method, comprising:

[0006] obtaining a first radiator outlet water temperature measurement value at engine cold start;

[0007] obtaining a second radiator outlet water temperature measurement value and an engine outlet water temperature measurement value after a preset time length of engine cold start;

[0008] performing thermostat sticking diagnosis according to the first radiator outlet water temperature measurement value, the second radiator outlet water temperature measurement value, and the engine outlet water temperature measurement value.

[0009] In a possible implementation, performing thermostat sticking diagnosis according to the first radiator outlet water temperature measurement value, the second radiator outlet water temperature measurement value, and the engine outlet water temperature measurement value comprises:

[0010] determining a first temperature difference value according to the first radiator outlet water temperature measurement value and the second radiator outlet water temperature measurement value;

[0011] determine the second temperature difference value according to the first radiator outlet water temperature measurement value and the engine outlet water temperature measurement value;

[0012] perform the thermostat sticking diagnosis according to the first temperature difference value and the second temperature difference value.

[0013] In a possible implementation, performing the thermostat sticking diagnosis according to the first temperature difference value and the second temperature difference value comprises:

[0014] calculating a ratio of the first temperature difference value and the second temperature difference value;

[0015] if the ratio is greater than a preset ratio, determining that the thermostat has a sticking fault.

[0016] In a possible implementation, determining the first temperature difference value according to the first radiator outlet water temperature measurement value and the second radiator outlet water temperature measurement value comprises:

[0017] calculating an absolute value of a difference between the first radiator outlet water temperature measurement value and the second radiator outlet water temperature measurement value to obtain the first temperature difference value; or

[0018] subtracting one of the first radiator outlet water temperature measurement value and the second radiator outlet water temperature measurement value from the other one to obtain the first temperature difference value.

[0019] In a possible implementation, determining the second temperature difference value according to the first radiator outlet water temperature measurement value and the engine outlet water temperature measurement value comprises:

[0020] calculating an absolute value of a difference between the first radiator outlet water temperature measurement value and the engine outlet water temperature measurement value to obtain the second temperature difference value; or

[0021] subtracting one of the first radiator outlet water temperature measurement value and the engine outlet water temperature measurement value from the other one to obtain the second temperature difference value.

[0022] In a possible implementation, obtaining the second radiator outlet water temperature measurement value and the engine outlet water temperature measurement value after the engine is cold started for a preset time length comprises:

[0023] obtaining, by a first temperature sensor, the engine outlet water temperature measurement value after the engine is cold started for the preset time length; the first temperature sensor is installed at an outlet position of the engine;

[0024] obtaining, by a second temperature sensor, the second radiator outlet water temperature measurement value after the engine is cold started for the preset time length; the second temperature sensor is installed at an outlet position of the radiator.

[0025] In a possible implementation, after the thermostat sticking diagnosis is performed according to the first radiator outlet water temperature measurement value, the second radiator outlet water temperature measurement value and the engine outlet water temperature measurement value, the thermostat sticking diagnosis method further includes:

[0026] If it is determined that the thermostat has a sticking fault, the user is prompted that the thermostat has a sticking fault.

[0027] In a second aspect, the embodiments of the present application provide a thermostat sticking diagnosis device, which includes:

[0028] The first acquisition module is configured to acquire a first radiator outlet water temperature measurement value when the engine is cold started.

[0029] The second acquisition module is configured to acquire a second radiator outlet water temperature measurement value and an engine outlet water temperature measurement value after the engine is cold started for a preset time length.

[0030] The diagnosis module is configured to perform thermostat sticking diagnosis according to the first radiator outlet water temperature measurement value, the second radiator outlet water temperature measurement value and the engine outlet water temperature measurement value.

[0031] In a third aspect, the embodiments of the present application provide an electronic device, which includes a processor and a memory. The memory is configured to store a computer program, and the processor is configured to call and run the computer program stored in the memory to execute the thermostat sticking diagnosis method according to the first aspect or any possible implementation of the first aspect.

[0032] In a fourth aspect, the embodiments of the present application provide a vehicle, which includes the electronic device according to the third aspect.

[0033] In a fifth aspect, the embodiments of the present application provide a computer readable storage medium, which stores a computer program. When the computer program is executed by a processor, the steps of the thermostat sticking diagnosis method according to the first aspect or any possible implementation of the first aspect are implemented.

[0034] The embodiments of the present application provide a thermostat sticking diagnosis method and device, an electronic device and a vehicle. The method performs thermostat sticking diagnosis according to a first radiator outlet water temperature measurement value when the engine is cold started, a second radiator outlet water temperature measurement value after the engine is cold started for a preset time length and an engine outlet water temperature measurement value. The thermostat sticking diagnosis can be performed only according to the temperature measurement values without calibration temperature values, so that the false alarm problem of the thermostat sticking fault caused by the calibration temperature is avoided. BRIEF DESCRIPTION OF DRAWINGS

[0035] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments or prior art description will be briefly introduced. Obviously, the drawings in the following description only constitute some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor.

[0036] Figure 1 is a structural schematic diagram of an engine cooling system provided by an embodiment of the present application;

[0037] Figure 2 is an implementation flowchart of a thermostat sticking diagnosis method provided by an embodiment of the present application;

[0038] Figure 3 is a structural schematic diagram of a thermostat sticking diagnosis device provided by an embodiment of the present application;

[0039] Figure 4 is a schematic diagram of an electronic device provided by an embodiment of the present application. DETAILED DESCRIPTION

[0040] In the following description, specific details such as specific system structures, techniques, etc. are presented in order to thoroughly understand the embodiments of the present application. However, it should be clear for those skilled in the art that the present application can also be implemented in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, circuits and methods are omitted in order not to obscure the description of the present application with unnecessary details.

[0041] In order to make the objects, technical solutions and advantages of the present application more clear, the following will be described by specific embodiments in combination with the drawings.

[0042] The thermostat is a valve for controlling the flow path of the cooling liquid, and is an automatic temperature regulating device, usually containing a temperature sensing component, which opens and closes the flow of liquid by thermal expansion or contraction. Currently, a wax type thermostat is usually used. Referring to Figure 1 When the cooling liquid is below the specified value, the wax in the thermostat temperature sensing body is in a solid state, and the thermostat valve is closed under the action of the spring to close the passage between the engine and the radiator, and the cooling liquid does not pass through the radiator, but only passes through the water pump and the thermostat to return to the engine for small circulation in the engine. When the cooling liquid temperature reaches the specified value, the wax begins to melt and gradually changes to a liquid, the volume increases and presses the rubber tube to shrink, and at the same time the rubber tube exerts an upward pushing force on the push rod to open the valve. At this time, the cooling liquid flows back to the engine through the radiator for large circulation in the engine.

[0043] The thermostat can adjust the heat dissipation capacity of the engine cooling system to ensure that the engine works in a proper temperature range. The thermostat must be in good technical condition, otherwise it will seriously affect the normal work of the engine. For example, if the main valve of the thermostat opens too late, the engine will overheat, and if the main valve of the thermostat opens too early, the engine preheating time will be prolonged, and the engine temperature will be too low. In order to ensure the normal operation of the automobile engine, it is necessary to detect whether the thermostat has a stuck fault during the use of the thermostat.

[0044] At present, the diagnosis of the thermostat stuck is determined according to the difference between the calibrated engine outlet water temperature and the actual engine outlet water temperature. This method requires that the calibrated engine outlet water temperature must be accurate. However, many parameters need to be considered in the calibration of the engine outlet water temperature, such as the engine exhaust and heat loss, fuel thermal efficiency, engine transmission system output efficiency, temperature rise caused by heat entering the cooling system, temperature drop caused by environmental temperature and vehicle speed, etc. The calibration process is complicated and prone to errors, which may cause false positives of the thermostat stuck fault.

[0045] To solve the above problems, the embodiment of the present application provides a thermostat stuck diagnosis method.

[0046] Referring to Figure 2 It shows the implementation flowchart of the thermostat stuck diagnosis method provided by the embodiment of the present application, and the execution subject of the thermostat stuck diagnosis method can be an electronic device.

[0047] The thermostat stuck diagnosis method is described as follows:

[0048] In S201, a first radiator outlet water temperature measurement value when the engine is cold started is obtained.

[0049] In this embodiment, the radiator outlet water temperature measurement value when the engine is cold started is taken as the first radiator outlet water temperature measurement value, which can be understood as the temperature measurement value of the cooling liquid at the outlet position of the radiator when the engine is cold started, and can be measured by a corresponding sensor.

[0050] In S202, a second radiator outlet water temperature measurement value and an engine outlet water temperature measurement value after the engine is cold started for a preset time length are obtained.

[0051] The preset time length can be set according to actual requirements, which is not limited here. After the engine is cold started for a preset time length means that the timing starts when the engine is cold started, and the engine runs for a preset time length, that is, the engine runs for a preset time length.

[0052] The water outlet temperature measurement value of the radiator after the engine cold start for the preset time length is taken as the second radiator water outlet temperature measurement value, which can be understood as the temperature measurement value of the cooling liquid at the outlet position of the radiator after the engine cold start for the preset time length, and can be measured by a corresponding sensor.

[0053] The water outlet temperature measurement value of the engine after the engine cold start for the preset time length is taken as the engine water outlet temperature measurement value, which can be understood as the temperature measurement value of the cooling liquid at the outlet position of the engine after the engine cold start for the preset time length, and can be measured by a corresponding sensor.

[0054] In S203, the thermostat sticking diagnosis is performed according to the first radiator water outlet temperature measurement value, the second radiator water outlet temperature measurement value and the engine water outlet temperature measurement value.

[0055] After the engine cold start, if the thermostat has no sticking fault, the small circulation is performed in the engine cooling system, the cooling liquid returns to the engine without passing through the radiator, the temperature of the cooling liquid rises quickly, that is, the engine water outlet temperature rises quickly, and after the preset time length, the difference between the engine water outlet temperature measurement value and the first radiator water outlet temperature measurement value becomes larger. Since the cooling liquid does not pass through the radiator, the temperature change at the outlet of the radiator is very small, and the difference between the first radiator water outlet temperature measurement value and the second radiator water outlet temperature measurement value is small.

[0056] If the thermostat has a sticking fault, the large circulation is performed in the engine cooling system, the cooling liquid returns to the engine after passing through the radiator, the temperature of the cooling liquid rises slowly, after the preset time length, the difference between the engine water outlet temperature measurement value and the first radiator water outlet temperature measurement value is small, and the difference between the first radiator water outlet temperature measurement value and the second radiator water outlet temperature measurement value is small.

[0057] In summary, the thermostat sticking diagnosis can be performed according to the relationship among the first radiator water outlet temperature measurement value, the second radiator water outlet temperature measurement value and the engine water outlet temperature measurement value.

[0058] The implementation means of the thermostat sticking diagnosis according to the first radiator water outlet temperature measurement value, the second radiator water outlet temperature measurement value and the engine water outlet temperature measurement value is not limited in the embodiments of the present application, and any implementation means can be used.

[0059] The thermostat sticking diagnosis is performed according to the first radiator water outlet temperature measurement value when the engine cold start, the second radiator water outlet temperature measurement value after the engine cold start for the preset time length and the engine water outlet temperature measurement value, which can be realized only according to the temperature measurement value without the calibration temperature value, thereby avoiding the false alarm problem of the thermostat sticking fault caused by the calibration temperature.

[0060] In some embodiments, S203 can include:

[0061] determining a first temperature difference value according to the first radiator outlet water temperature measurement value and the second radiator outlet water temperature measurement value;

[0062] determining a second temperature difference value according to the first radiator outlet water temperature measurement value and the engine outlet water temperature measurement value;

[0063] performing a thermostat stuck diagnosis according to the first temperature difference value and the second temperature difference value.

[0064] According to the change of the first radiator outlet water temperature measurement value, the second radiator outlet water temperature measurement value and the engine outlet water temperature measurement value when the thermostat stuck fault occurs, in the embodiment, the first temperature difference value can be determined according to the first radiator outlet water temperature measurement value and the second radiator outlet water temperature measurement value, the second temperature difference value can be determined according to the first radiator outlet water temperature measurement value and the engine outlet water temperature measurement value, and the thermostat stuck diagnosis can be performed according to the first temperature difference value and the second temperature difference value.

[0065] The implementation means of performing the thermostat stuck diagnosis according to the first temperature difference value and the second temperature difference value in the embodiment is not limited specifically, and any implementation means can be used.

[0066] In some embodiments, performing the thermostat stuck diagnosis according to the first temperature difference value and the second temperature difference value can include:

[0067] calculating a ratio of the first temperature difference value and the second temperature difference value;

[0068] if the ratio is greater than a preset ratio, determining that the thermostat stuck fault occurs.

[0069] In the embodiment, the ratio of the first temperature difference value divided by the second temperature difference value is calculated, and it is determined whether the ratio is greater than the preset ratio, so as to determine whether the thermostat stuck fault occurs. When the ratio is greater than the preset ratio, it is determined that the thermostat stuck fault occurs, otherwise, it is determined that the thermostat stuck fault does not occur.

[0070] According to the change of the first radiator outlet water temperature measurement value, the second radiator outlet water temperature measurement value and the engine outlet water temperature measurement value when the thermostat is stuck, if the thermostat is not stuck, the difference between the engine outlet water temperature measurement value and the first radiator outlet water temperature measurement value is continuously large, and the difference between the first radiator outlet water temperature measurement value and the second radiator outlet water temperature measurement value is small, that is, when the thermostat is not stuck, the first temperature difference is small, and the second temperature difference is large, so the ratio obtained by calculation is small. If the thermostat is stuck, the difference between the engine outlet water temperature measurement value and the first radiator outlet water temperature measurement value is small, and the difference between the first radiator outlet water temperature measurement value and the second radiator outlet water temperature measurement value is small, that is, when the thermostat is stuck, the first temperature difference is small, and the second temperature difference is also small, so the ratio obtained by calculation is large.

[0071] It should be noted that the first temperature difference and the second temperature difference are both greater than 0.

[0072] The preset ratio can be set according to actual needs, which is not limited here. Since the ratio of the first temperature difference to the second temperature difference changes greatly when the thermostat is stuck or not, the preset ratio can be set to a value between the two ratios, and the threshold value does not need to consider too many factors, and the determination process is relatively simple.

[0073] The first temperature difference and the second temperature difference are used to diagnose the thermostat sticking in this embodiment, which is simple, fast, saves calibration time, and has high accuracy of the diagnosis result.

[0074] In some embodiments, the first temperature difference is determined according to the first radiator outlet water temperature measurement value and the second radiator outlet water temperature measurement value, including:

[0075] The absolute value of the difference between the first radiator outlet water temperature measurement value and the second radiator outlet water temperature measurement value is calculated to obtain the first temperature difference; or,

[0076] The larger one of the first radiator outlet water temperature measurement value and the second radiator outlet water temperature measurement value is subtracted by the other one to obtain the first temperature difference.

[0077] If the first radiator outlet water temperature measurement value is the larger one of the first radiator outlet water temperature measurement value and the second radiator outlet water temperature measurement value, the other one of the first radiator outlet water temperature measurement value and the second radiator outlet water temperature measurement value is the second radiator outlet water temperature measurement value; if the second radiator outlet water temperature measurement value is the larger one of the first radiator outlet water temperature measurement value and the second radiator outlet water temperature measurement value, the other one of the first radiator outlet water temperature measurement value and the second radiator outlet water temperature measurement value is the first radiator outlet water temperature measurement value.

[0078] In some embodiments, the determining of the second temperature difference value according to the first radiator outlet water temperature measurement value and the engine outlet water temperature measurement value comprises:

[0079] calculating an absolute value of a difference between the first radiator outlet water temperature measurement value and the engine outlet water temperature measurement value to obtain the second temperature difference value; or

[0080] subtracting the other one of the first radiator outlet water temperature measurement value and the engine outlet water temperature measurement value from the larger one of the first radiator outlet water temperature measurement value and the engine outlet water temperature measurement value to obtain the second temperature difference value.

[0081] If the first radiator outlet water temperature measurement value is the larger one of the first radiator outlet water temperature measurement value and the engine outlet water temperature measurement value, the other one of the first radiator outlet water temperature measurement value and the engine outlet water temperature measurement value is the engine outlet water temperature measurement value; if the engine outlet water temperature measurement value is the larger one of the first radiator outlet water temperature measurement value and the engine outlet water temperature measurement value, the other one of the first radiator outlet water temperature measurement value and the engine outlet water temperature measurement value is the first radiator outlet water temperature measurement value.

[0082] In some embodiments, the S202 can comprise:

[0083] obtaining, by the first temperature sensor, the engine outlet water temperature measurement value after the engine is cold started for the preset time length; the first temperature sensor is installed at an outlet position of the engine;

[0084] obtaining, by the second temperature sensor, the second radiator outlet water temperature measurement value after the engine is cold started for the preset time length; the second temperature sensor is installed at an outlet position of the radiator.

[0085] The S201 can comprise:

[0086] obtaining, by the second temperature sensor, the first radiator outlet water temperature measurement value when the engine is cold started.

[0087] Referring to Figure 1The engine cooling system comprises an engine water jacket, a water pump, a thermostat, and a radiator, and the connection relationship of the components is shown in Figure 1 The thermostat selectively controls the coolant of the engine water jacket to flow into the radiator.

[0088] The first temperature sensor can be arranged between the water pump and the thermostat, and the second temperature sensor can be arranged at an outlet position of the radiator. Exemplarily, the first temperature sensor can also be arranged between the engine water jacket and the water pump.

[0089] In some embodiments, after S203, the thermostat sticking diagnosis method can further comprise:

[0090] If it is determined that the thermostat has a sticking fault, the user is prompted that the thermostat has a sticking fault.

[0091] In some possible implementations, if it is determined that the thermostat has a sticking fault, corresponding alarm can be performed to prompt the user that the thermostat has a sticking fault, so as to facilitate after-sales maintenance and improve the user driving experience. For example, the thermostat corresponding indicator light can be alarmed, or the thermostat sticking fault can be displayed on the display screen of the vehicle, or information can be sent to the terminal of the user, etc.

[0092] It should be understood that the sequence of the steps in the above embodiments does not mean the execution sequence, and the execution sequence of the processes should be determined according to the function and inherent logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0093] The following is a device embodiment of the present application. For details not described in detail, reference can be made to the corresponding method embodiments described above.

[0094] Figure 3 The structure schematic diagram of the thermostat sticking diagnosis device provided by the embodiments of the present application is shown. For the convenience of description, only the parts related to the embodiments of the present application are shown, and the details are as follows:

[0095] As shown in Figure 3 The thermostat sticking diagnosis device 30 comprises a first acquisition module 31, a second acquisition module 32, and a diagnosis module 33.

[0096] The first acquisition module 31 is configured to acquire a first radiator outlet water temperature measurement value when the engine is cold started.

[0097] The second acquisition module 32 is configured to acquire a second radiator outlet water temperature measurement value and an engine outlet water temperature measurement value after the engine is cold started for a preset time length.

[0098] The diagnostic module 33 is configured to perform the thermostat sticking diagnosis according to the first radiator outlet water temperature measurement value, the second radiator outlet water temperature measurement value and the engine outlet water temperature measurement value.

[0099] In a possible implementation, the diagnostic module 33 is specifically configured to:

[0100] determine a first temperature difference value according to the first radiator outlet water temperature measurement value and the second radiator outlet water temperature measurement value;

[0101] determine a second temperature difference value according to the first radiator outlet water temperature measurement value and the engine outlet water temperature measurement value;

[0102] perform the thermostat sticking diagnosis according to the first temperature difference value and the second temperature difference value.

[0103] In a possible implementation, in the diagnostic module 33, the thermostat sticking diagnosis is performed according to the first temperature difference value and the second temperature difference value, including:

[0104] calculating a ratio of the first temperature difference value and the second temperature difference value;

[0105] if the ratio is greater than a preset ratio, determining that the thermostat has a sticking fault.

[0106] In a possible implementation, in the diagnostic module 33, the first temperature difference value is determined according to the first radiator outlet water temperature measurement value and the second radiator outlet water temperature measurement value, including:

[0107] calculating an absolute value of a difference between the first radiator outlet water temperature measurement value and the second radiator outlet water temperature measurement value to obtain the first temperature difference value; or

[0108] subtracting one of the first radiator outlet water temperature measurement value and the second radiator outlet water temperature measurement value from the other one to obtain the first temperature difference value.

[0109] In a possible implementation, in the diagnostic module 33, the second temperature difference value is determined according to the first radiator outlet water temperature measurement value and the engine outlet water temperature measurement value, including:

[0110] calculating an absolute value of a difference between the first radiator outlet water temperature measurement value and the engine outlet water temperature measurement value to obtain the second temperature difference value; or

[0111] subtracting one of the first radiator outlet water temperature measurement value and the engine outlet water temperature measurement value from the other one to obtain the second temperature difference value.

[0112] In a possible implementation, the second obtaining module 32 is specifically configured to:

[0113] The first temperature sensor is installed at an outlet position of the engine.

[0114] The second temperature sensor is installed at an outlet position of the radiator.

[0115] In a possible implementation, the diagnosing module 33 is further configured to:

[0116] If it is determined that the thermostat has a stuck fault, the user is prompted that the thermostat has a stuck fault.

[0117] The embodiments of the present application further provide a computer program product having program codes, which perform the steps in any one of the thermostat stuck diagnosing method embodiments described above when running in a corresponding processor, controller, computing device or electronic device, for example Figure 2 S201 to S203. Those skilled in the art should understand that the method and the device proposed by the embodiments of the present application can be implemented in various forms of hardware, software, firmware, special-purpose processor or combination thereof. The special-purpose processor can include application-specific integrated circuit (ASIC), reduced instruction set computer (RISC) and / or field programmable gate array (FPGA). The proposed method and device are preferably implemented as a combination of hardware and software. The software is preferably installed as an application program on a program storage device. It is typically a machine based on a computer platform with hardware, such as one or more central processing units (CPUs), random access memories (RAMs) and one or more input / output (I / O) interfaces. An operating system is also typically installed on the computer platform. The various processes and functions described herein can be part of the application program, or part thereof can be executed by the operating system.

[0118] Figure 4 is a schematic diagram of an electronic device provided by the embodiments of the present application. As Figure 4 shown, the electronic device 4 of the embodiments includes a processor 40 and a memory 41. The memory 41 is configured to store a computer program 42, and the processor 40 is configured to invoke and run the computer program 42 stored in the memory 41 to perform the steps in each of the thermostat stuck diagnosing method embodiments described above, for example Figure 2 S201 to S203. Alternatively, the processor 40 is configured to invoke and run the computer program 42 stored in the memory 41 to implement the functions of each module / unit in each of the device embodiments described above, for example Figure 3Functions of the illustrated modules / units 31-33.

[0119] By way of example, the computer program 42 can be divided into one or more modules / units, which are stored in the memory 41 and executed by the processor 40 to complete / implement the solutions provided by the present application. The one or more modules / units can be a series of computer program instruction segments capable of completing a specific function, which are used to describe the execution process of the computer program 42 in the electronic device 4. For example, the computer program 42 can be divided into Figure 3 The illustrated modules / units 31-33.

[0120] The electronic device 4 can include, but is not limited to, the processor 40, the memory 41. Those skilled in the art can understand that the electronic device 4 can further include other components required for the electronic device 4 to perform the solutions provided by the present application. Figure 4 The electronic device 4 is only an example and does not constitute a limitation on the electronic device 4, and can include more or fewer components than those shown, or combine certain components, or different components, for example, the electronic device can further include an input / output device, a network access device, a bus, etc.

[0121] The processor 40 can be a central processing unit (CPU), and can also be other general-purpose processors, digital signal processors (DSP), application specific integrated circuits (ASIC), field programmable gate arrays (FPGA) or other programmable logic devices, discrete gates or transistor logic components, discrete hardware components, etc. The general-purpose processor can be a microprocessor or the processor can also be any conventional processor.

[0122] The memory 41 can be an internal storage unit of the electronic device 4, such as a hard disk or a memory of the electronic device 4. The memory 41 can also be an external storage device of the electronic device 4, such as a plug-in hard disk, a smart media card (SMC), a secure digital (SD) card, a flash card, etc. Further, the memory 41 can include both the internal storage unit and the external storage device of the electronic device 4. The memory 41 is used to store the computer program and other programs and data required by the electronic device. The memory 41 can also be used to temporarily store data that has been output or will be output.

[0123] Corresponding to the electronic device described above, the embodiment of the present application also provides a vehicle comprising the electronic device.

[0124] Those skilled in the art can clearly understand that, for the convenience and brevity of description, only the above-mentioned division of each functional unit and module is exemplified, and in actual application, the above-mentioned functions can be completed by different functional units and modules according to needs, that is, the internal structure of the device is divided into different functional units or modules to complete all or part of the functions described above. Each functional unit and module in the embodiment can be integrated in one processing unit, or each unit can exist physically, or two or more units can be integrated in one unit. The integrated unit can be realized in the form of hardware or in the form of software functional unit. In addition, the specific names of each functional unit and module are only for the convenience of mutual distinction, and do not limit the protection scope of the present application. The specific working process of the unit and module in the above system can refer to the corresponding process in the foregoing method embodiment, which will not be repeated here.

[0125] In the above embodiments, the description of each embodiment has its own emphasis, and the parts not described or recorded in a certain embodiment can be referred to the related description of other embodiments.

[0126] Those of ordinary skill in the art can realize that the units and algorithm steps of each example described in combination with the embodiments disclosed herein can be realized in electronic hardware or in combination of computer software and electronic hardware. Whether the functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. A person skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of the present application.

[0127] In the embodiments provided in the present application, it should be understood that the disclosed devices / equipment and methods can be implemented in other ways. For example, the device / equipment embodiments described above are only schematic, for example, the division of the modules or units is only a logical function division, and actual implementation can have another division manner, for example, a plurality of units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the coupling or direct coupling or communication connection between the displayed or discussed each other can be indirect coupling or communication connection through some interfaces, devices or units, and can be electrical, mechanical or other forms.

[0128] The units described as separate components may or may not be physically separate, and the components displayed as units may or may not be physical units, i.e. may be located in one place, or may be distributed on multiple network units. Part or all of the units can be selected according to actual needs to achieve the purpose of the embodiment scheme.

[0129] In addition, each functional unit in each embodiment of the present application can be integrated in one processing unit, or each unit can be physically present alone, or two or more units can be integrated in one unit. The integrated unit can be realized in the form of hardware or in the form of a software functional unit.

[0130] The integrated module / unit, if realized in the form of a software functional unit and sold or used as an independent product, can be stored in a computer-readable storage medium. Based on this understanding, all or part of the processes in the above-mentioned embodiment methods can also be completed by a computer program instructing related hardware, and the computer program can be stored in a computer-readable storage medium. When the processor executes the computer program, the steps of each thermostat hysteresis diagnosis method embodiment described above can be implemented. The computer program includes computer program code, which can be in the form of source code, object code, executable files or some intermediate forms, etc. The computer-readable medium can include any entity or device capable of carrying the computer program code, recording medium, U disk, mobile hard disk, magnetic disk, optical disk, computer memory, read-only memory (Read-Only Memory, ROM), random access memory (Random Access Memory, RAM), electrical carrier signal, telecommunication signal and software distribution medium, etc. It should be noted that the contents included in the computer-readable medium can be appropriately increased or decreased according to the requirements of legislation and patent practice in the jurisdiction, for example, in some jurisdictions, according to legislation and patent practice, the computer-readable medium does not include electrical carrier signals and telecommunication signals.

[0131] In addition, the features of the embodiments shown in the drawings of the present application or mentioned in the specification of the present application do not have to be understood as independent embodiments from each other. Rather, each feature described in one example of an embodiment can be combined with one or more other desired features from other embodiments, thereby generating other embodiments which are not described in words or with reference to the drawings.

[0132] The above-described embodiments are only used to illustrate the technical solutions of the present application, but not limit them; although the present application is described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement to part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application, and should be included in the protection scope of the present application.

Claims

1. A thermostat sticking diagnosis method characterized by comprising: The method comprises the following steps: obtaining a first radiator outlet water temperature measurement value when the engine is cold started; obtaining a second radiator outlet water temperature measurement value and an engine outlet water temperature measurement value after the engine is cold started for a preset time length; performing thermostat sticking diagnosis according to the first radiator outlet water temperature measurement value, the second radiator outlet water temperature measurement value and the engine outlet water temperature measurement value; the thermostat sticking diagnosis according to the first radiator outlet water temperature measurement value, the second radiator outlet water temperature measurement value and the engine outlet water temperature measurement value comprises: determining a first temperature difference value according to the first radiator outlet water temperature measurement value and the second radiator outlet water temperature measurement value; determining a second temperature difference value according to the first radiator outlet water temperature measurement value and the engine outlet water temperature measurement value; and performing thermostat sticking diagnosis according to the first temperature difference value and the second temperature difference value.

2. The thermostat stickering diagnosis method according to claim 1, characterized by, the thermostat sticking diagnosis according to the first temperature difference value and the second temperature difference value comprises: calculating a ratio of the first temperature difference value and the second temperature difference value; if the ratio is greater than a preset ratio, it is determined that the thermostat has a sticking fault.

3. The thermostat stickering diagnosis method according to claim 1, characterized by, the determination of the first temperature difference value according to the first radiator outlet water temperature measurement value and the second radiator outlet water temperature measurement value comprises: calculating an absolute value of a difference between the first radiator outlet water temperature measurement value and the second radiator outlet water temperature measurement value to obtain the first temperature difference value; or subtracting one of the first radiator outlet water temperature measurement value and the second radiator outlet water temperature measurement value from the other one to obtain the first temperature difference value.

4. The thermostat stickering diagnosis method of claim 1, wherein the determination of the second temperature difference value according to the first radiator outlet water temperature measurement value and the engine outlet water temperature measurement value comprises: calculating an absolute value of a difference between the first radiator outlet water temperature measurement value and the engine outlet water temperature measurement value to obtain the second temperature difference value; or subtracting one of the first radiator outlet water temperature measurement value and the engine outlet water temperature measurement value from the other one to obtain the second temperature difference value.

5. The thermostat sticking diagnosis method according to any one of claims 1 to 4, characterized by, the obtaining of the second radiator outlet water temperature measurement value and the engine outlet water temperature measurement value after the engine is cold started for a preset time length comprises: obtaining the engine outlet water temperature measurement value after the engine is cold started for a preset time length through a first temperature sensor; the first temperature sensor is installed at an outlet position of the engine; obtaining the second radiator outlet water temperature measurement value after the engine is cold started for a preset time length through a second temperature sensor; the second temperature sensor is installed at an outlet position of the radiator.

6. The thermostat stickering diagnosis method according to any one of claims 1 to 4, characterized in that, after the thermostat sticking diagnosis according to the first radiator outlet water temperature measurement value, the second radiator outlet water temperature measurement value and the engine outlet water temperature measurement value, the thermostat sticking diagnosis method further comprises: if it is determined that the thermostat has a sticking fault, prompting the user that the thermostat has a sticking fault.

7. A thermostat sticking diagnosis apparatus characterized by comprising: ​ The first acquisition module is configured to acquire a first radiator outlet water temperature measurement value when the engine is cold started. The second acquisition module is configured to acquire a second radiator outlet water temperature measurement value and an engine outlet water temperature measurement value after the engine is cold started for a preset time length. The diagnosis module is configured to perform thermostat sticking diagnosis according to the first radiator outlet water temperature measurement value, the second radiator outlet water temperature measurement value, and the engine outlet water temperature measurement value. The diagnosis module is configured to determine a first temperature difference value according to the first radiator outlet water temperature measurement value and the second radiator outlet water temperature measurement value. The diagnosis module is configured to determine a second temperature difference value according to the first radiator outlet water temperature measurement value and the engine outlet water temperature measurement value.

8. An electronic device, comprising: The diagnosis module is configured to perform thermostat sticking diagnosis according to the first temperature difference value and the second temperature difference value.

9. A vehicle characterized by comprising: The electronic device includes a memory and a processor, the memory is configured to store a computer program, and the processor is configured to call and run the computer program stored in the memory to execute the thermostat sticking diagnosis method according to any one of claims 1 to 6. The electronic device includes the electronic device according to claim 8.

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