Vehicle engine coolant temperature sensor signal stick detection method

Abstract

The application provides a vehicle engine coolant temperature sensor signal sticking detection method, electronic equipment, readable storage medium and vehicle, and the method comprises the following steps: obtaining a first maximum engine coolant temperature change amplitude after the vehicle starts; if the first engine coolant temperature change amplitude is less than a preset temperature threshold; if yes, judging whether the current working condition of the vehicle meets a first preset condition; if yes, the vehicle performs a temperature rising / temperature dropping operation, and a second maximum engine coolant temperature change amplitude is obtained; if the second engine coolant temperature change amplitude is less than the preset temperature threshold, the vehicle performs a temperature dropping / temperature rising operation, and a second maximum engine coolant temperature change amplitude is obtained; if the third maximum engine coolant temperature change amplitude is less than the preset temperature threshold, it is determined that a signal sticking fault exists. The application can accurately detect and determine whether a vehicle engine coolant temperature sensor has a sticking fault.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of vehicles, in particular to a vehicle engine coolant temperature sensor signal sticking detection method, electronic equipment, readable storage medium and vehicle. BACKGROUND

[0002] The operating principle of the engine cooling circulation system of the vehicle is that the temperature of the engine coolant is monitored by the engine coolant temperature sensor, and the thermostat is switched to different cooling circulation loops according to the monitored temperature value. When the temperature is lower than the opening temperature of the thermostat, the coolant enters the first cooling circulation loop without a radiator; when the temperature is higher than the opening temperature of the thermostat, the thermostat is opened to make the coolant enter the second cooling circulation loop with a radiator. In this process, the vehicle engine coolant temperature sensor plays an important role, and it is necessary to determine whether the vehicle engine coolant temperature sensor has a sticking fault.

[0003] The existing vehicle engine coolant temperature sensor sticking fault detection scheme has the following deficiencies:

[0004] 1. Some engine thermal management systems, after the engine is fully warmed up and started, the warm-up start temperature is high, such as 105℃, at this time, the vehicle enters the acceleration working condition, and then enters the fuel cut-off coasting working condition. Due to the very precise thermal management control, the vehicle engine temperature will be controlled at 105℃ for a long time, resulting in false reporting of the water temperature signal sticking fault.

[0005] 2. The existing technology needs to enter high-temperature and low-temperature working conditions multiple times during vehicle operation, and the fault reporting time is long, it is difficult to enter the engine protection mode, and it may cause the engine coolant to be high or even boiling before the fault is reported.

[0006] The above problems have no effective solution. SUMMARY

[0007] The purpose of the present application is to provide a vehicle engine coolant temperature sensor signal sticking detection method, electronic equipment, readable storage medium and vehicle. By actively changing the coolant temperature environment, the vehicle engine coolant temperature sensor sticking fault can be quickly and accurately detected.

[0008] To solve the above technical problems, the present application provides a vehicle engine coolant temperature sensor signal sticking detection method, comprising the following steps: step A, after the vehicle starts, the maximum engine coolant temperature and the minimum engine coolant temperature detected by the engine coolant temperature sensor of the vehicle are used to obtain the engine coolant temperature change amplitude of the vehicle in real time; step B, when the engine coolant temperature change amplitude no longer changes, the engine coolant temperature change amplitude is taken as the first maximum engine coolant temperature change amplitude; step C, it is judged whether the first maximum engine coolant temperature change amplitude is less than a preset temperature threshold; if yes, step D is executed to judge whether the current working condition of the vehicle meets the first preset condition; if yes, step E is executed to perform a temperature rising / temperature lowering operation on the vehicle within a first preset time period, so that the vehicle enters a high temperature working condition / low temperature working condition, and the second maximum engine coolant temperature change amplitude is obtained according to the maximum engine coolant temperature and the minimum engine coolant temperature detected by the engine coolant temperature sensor since the vehicle starts; step F, it is judged whether the second maximum engine coolant temperature change amplitude is less than the preset temperature threshold; if yes, step G is executed to perform a temperature lowering / temperature rising operation on the vehicle within a second preset time period, so that the vehicle enters a low temperature working condition / high temperature working condition, and the third maximum engine coolant temperature change amplitude is obtained according to the maximum engine coolant temperature and the minimum engine coolant temperature detected by the engine coolant temperature sensor since the vehicle starts; step H, it is judged whether the third maximum engine coolant temperature change amplitude is less than the preset temperature threshold; if no, it is determined that the engine coolant temperature sensor does not have a signal sticking fault; if yes, it is determined that the engine coolant temperature sensor has a signal sticking fault.

[0009] Optionally, the first preset condition comprises that the engine coolant temperature sensor does not have a circuit fault.

[0010] Optionally, after the vehicle starts, experiences a preset number of high temperature working conditions in the running process, and experiences a preset number of low temperature working conditions in the running process, if the first engine coolant temperature change amplitude is less than the first threshold, steps E to H are executed.

[0011] Optionally, the temperature rising operation comprises: under the condition that a second preset condition is met, the cooling fan and / or the thermostat in the cooling cycle system of the vehicle are turned off.

[0012] Optionally, the second preset condition comprises that the rising amount of the radiator coolant temperature detected by the radiator coolant temperature sensor of the vehicle reaches a first preset value after the temperature rising operation starts.

[0013] Optionally, the second preset condition further comprises: the theoretical coolant temperature of the vehicle under the current working condition is greater than or equal to a second preset value.

[0014] Optionally, the temperature reduction operation comprises: controlling a cooling fan in a cooling circulation system of the vehicle to operate at a maximum duty cycle; and / or controlling a thermostat in the cooling circulation system of the vehicle to operate at a maximum flow effect state; and / or controlling an electronic water pump in the cooling circulation system of the vehicle to operate at a maximum duty cycle.

[0015] Optionally, when the speed of the tested vehicle at a moment in the testing step deviates from the speed of the simulated vehicle at a corresponding moment in the simulated acquisition step by more than a second preset percentage, the hub control mode is exited.

[0016] The application further provides an electronic device comprising a processor and a memory, wherein the memory stores a computer program, and the computer program is executed by the processor to implement the vehicle engine coolant temperature sensor signal sticking detection method.

[0017] The application further provides a readable storage medium storing a computer program, and the computer program is executed by a processor to implement the vehicle engine coolant temperature sensor signal sticking detection method.

[0018] The application further provides a vehicle comprising the electronic device.

[0019] The vehicle engine coolant temperature sensor signal sticking detection method, the electronic device, the readable storage medium and the vehicle provided by the application have the following beneficial effects:

[0020] The vehicle engine coolant temperature sensor signal sticking detection method provided by the application can actively change the temperature environment of the engine coolant, actively and quickly establish high-temperature working conditions and low-temperature working conditions, and thus can quickly and accurately detect whether the engine coolant temperature sensor has a signal sticking fault, avoiding false positives of the thermal management system and the problem that it takes a long time to detect or even cannot detect that the engine coolant temperature sensor has a signal sticking fault for a long time.

[0021] Since the electronic device provided by the application is used to implement the vehicle engine coolant temperature sensor signal sticking detection method, the electronic device can quickly and accurately detect whether the engine coolant temperature sensor has a signal sticking fault, avoiding false positives of the thermal management system and the problem that it takes a long time to detect or even cannot detect that the engine coolant temperature sensor has a signal sticking fault for a long time.

[0022] The readable storage medium provided by the present application can quickly and accurately detect whether the engine coolant temperature sensor has a signal sticking fault, avoids false alarms of the thermal management system, and solves the problems of long time to detect or even long time to be unable to detect that the engine coolant temperature sensor has a signal sticking fault.

[0023] The vehicle provided by the present application can quickly and accurately detect whether the engine coolant temperature sensor has a signal sticking fault, avoids false alarms of the thermal management system, and solves the problems of long time to detect or even long time to be unable to detect that the engine coolant temperature sensor has a signal sticking fault. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 A schematic diagram of a cooling circulation system of a prior art vehicle;

[0025] Figure 2 A curve diagram of the engine coolant temperature, the radiator coolant temperature and the theoretical engine coolant temperature changing with time after the vehicle is started in a normal state of the engine coolant temperature sensor;

[0026] Figure 3 A curve diagram of the engine coolant temperature and the theoretical engine coolant temperature changing with time after the vehicle is started in a sticking fault state of the engine coolant temperature sensor;

[0027] Figure 4 A flowchart of a vehicle engine coolant temperature control method provided by an embodiment of the present application;

[0028] Figure 5 A block structure diagram of an electronic device provided by an embodiment of the present application;

[0029] The reference signs are as follows:

[0030] 1-engine; 11-thermostat; 12-water pump;

[0031] 2-radiator; 21-cooling fan;

[0032] 31-first cooling circulation loop; 32-second cooling circulation loop;

[0033] 41-curve of the engine coolant temperature changing with time after the vehicle is started in a normal state of the engine coolant temperature sensor;

[0034] 42-curve of the theoretical engine coolant temperature changing with time after the vehicle is started;

[0035] 43 - plot of radiator coolant temperature as a function of time after vehicle start;

[0036] 51 - plot of engine coolant temperature as a function of time after vehicle start in the event of a stuck fault condition of the engine coolant temperature sensor;

[0037] 52 - plot of vehicle speed as a function of time after vehicle start;

[0038] 101 - processor; 102 - communication interface; 103 - memory; 104 - signal transmission line. DETAILED DESCRIPTION

[0039] In order that the objects, advantages, and features of the present application can be more clearly understood, the following detailed description together with the appended drawings will be read. It should be noted that all the drawings are in a very simplified form and not drawn to scale, and are merely intended to facilitate, clarify and further set forth the present embodiments. In addition, the structures shown in the drawings are often a portion of the actual structures. In particular, the emphasis of each drawing is different, and sometimes the proportions are different.

[0040] It will be understood that when an element or layer is referred to as being "on" or "connected to" another element or layer, it can be directly on or connected to the other element or layer or intervening elements or layers can be present. In contrast, when an element is referred to as being "directly on" or "directly connected to" another element or layer, there are no intervening elements or layers present. Although the terms first, second, third, etc. can be used herein to describe various elements, components, regions, layers and / or sections, these terms are not intended to denote a particular order or hierarchy. These terms are used only to distinguish one element, component, region, layer or section from another element, component, region, layer or section. Thus, a first element, component, region, layer or section discussed below could be termed a second element, component, region, layer or section without departing from the teachings of the present application. Spatially relative terms such as "beneath", "below", "lower", "above", "upper", and the like can be used herein for ease of description to describe one element or feature's relationship to another element(s) or feature(s) as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "below" or "beneath" other elements or features would then be oriented "above" or "over" the other elements or features. The device can be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly. The terms of degree such as "about" and "substantially" as used herein mean approximately or nearly, for example, within 10% of the stated value. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of this application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and / or "comprising", when used in this specification, specify the presence of stated features, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and / or groups thereof. As used herein the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0041] For the purpose of understanding, the principle of the cooling cycle of the vehicle engine is described first.

[0042] Referring to Figure 1 , Figure 1 The prior art vehicle cooling cycle system is shown in Fig. 1. Figure 1As shown, when the coolant temperature is lower than the opening temperature of the thermostat 11, the coolant only flows through the first cooling circulation circuit 31, and the first cooling circulation circuit does not have a radiator, so the heat dissipation effect is small. After the vehicle starts, the coolant will gradually heat up, and when the coolant temperature reaches the opening temperature of the thermostat 11, the thermostat 11 opens and allows the coolant to enter the second cooling circulation circuit 32. In the second cooling circulation circuit 32, the coolant flows through the radiator 2 to dissipate heat, the temperature drops, and then flows through the engine 1 to absorb heat from the engine 1. This process is repeated to achieve a cooling cycle. It should be understood that the engine coolant refers to the coolant flowing through the engine 1, and the radiator coolant refers to the coolant flowing through the radiator 2.

[0043] Please refer to Figure 2 , Figure 2 The engine coolant temperature, the radiator coolant temperature, and the theoretical engine coolant temperature under the normal state of the engine coolant temperature sensor are shown in the graph of the change over time after the vehicle starts. The engine coolant temperature is obtained by monitoring the engine coolant temperature sensor, the radiator coolant temperature is obtained by the radiator coolant temperature sensor, and the theoretical engine coolant temperature can be obtained by pre-experimenting and recording and analyzing the corresponding vehicle model. As shown in Figure 2 According to the engine coolant temperature curve 41 under the normal state of the engine coolant temperature sensor, the theoretical engine coolant temperature curve 42, and the radiator coolant temperature curve 43, it can be seen that under the normal state of the engine coolant temperature sensor, the engine coolant temperature detected by the engine coolant temperature sensor of the vehicle is close to the theoretical engine coolant temperature under the corresponding working condition obtained in advance, but the radiator coolant temperature detected by the radiator coolant temperature sensor of the vehicle shows a curve characteristic of first being flat and then rising. This is because during the initial period after the vehicle starts, the coolant temperature has not risen to the opening temperature of the thermostat 11, and the heated coolant has not entered the second cooling circulation circuit 32, so the radiator coolant temperature is low at this time. After a certain period of time after the vehicle starts, the engine coolant temperature flowing through the engine gradually rises to the opening temperature of the thermostat 11, the thermostat 11 opens, and the heated coolant enters the second cooling circulation circuit 32 and flows through the radiator 2, so the radiator coolant temperature, i.e., the radiator coolant temperature detected by the radiator coolant temperature sensor, gradually rises.

[0044] Please refer to Figure 3 , Figure 3A graph of the engine coolant temperature and the theoretical engine coolant temperature over time after the vehicle is started in the stuck fault state of the engine coolant temperature sensor. As shown in FIG. Figure 3 According to the theoretical engine coolant temperature curve 42, the radiator coolant temperature curve 43, the engine coolant temperature curve 51 in the stuck fault state of the engine coolant temperature sensor, and the vehicle speed curve 52 over time after the vehicle is started, it can be seen that when the engine coolant temperature sensor is in the stuck fault state, its temperature monitoring function has basically been lost, and the engine coolant temperature cannot be effectively reflected, so the engine coolant temperature will continue to be at an abnormally low value, but the theoretical engine coolant temperature is stored through pre-experiment recording and is retrieved only in this scenario, so its value can still correspond to the display of different working conditions after the vehicle is started. The radiator coolant temperature will gradually increase as the vehicle is started. If this state continues, since the theoretical engine coolant temperature is displayed according to the pre-experiment and can only be used as a reference and cannot completely cover all engine coolant temperatures, in an extreme working condition, the real engine coolant temperature can exceed the alarm threshold, causing damage to the engine.

[0045] The purpose of the present application is to provide a vehicle engine coolant temperature sensor signal sticking detection method, electronic equipment, readable storage medium, and vehicle. By actively changing the coolant temperature environment, it is quickly determined whether the vehicle engine coolant temperature sensor has a sticking fault.

[0046] To achieve the above purpose, the present application provides a vehicle engine coolant temperature sensor signal sticking detection method, please refer to Figure 4 , which schematically shows a flowchart of the vehicle engine coolant temperature control method provided by an embodiment of the present application. As shown in FIG. Figure 4 The vehicle engine coolant temperature control method provided by the present application comprises the following steps:

[0047] Step A, after the vehicle is started, the maximum engine coolant temperature and the minimum engine coolant temperature detected by the engine coolant temperature sensor of the vehicle are used to obtain the engine coolant temperature change amplitude of the vehicle in real time;

[0048] Step B, when the engine coolant temperature change amplitude no longer changes, the engine coolant temperature change amplitude is taken as the first maximum engine coolant temperature change amplitude;

[0049] Step C, it is judged whether the first maximum engine coolant temperature change amplitude is less than a preset temperature threshold;

[0050] If no, it is determined that the engine coolant temperature sensor does not have a signal sticking fault;

[0051] If yes, step D is performed to determine whether the current working condition of the vehicle meets a first preset condition;

[0052] If yes, step E is performed to perform a temperature rising / temperature lowering operation on the vehicle within a first preset time period, so that the vehicle enters a high-temperature working condition / low-temperature working condition, and a second maximum engine coolant temperature change range is obtained according to the maximum engine coolant temperature and the minimum engine coolant temperature detected by the engine coolant temperature sensor after the vehicle is started;

[0053] Step F is to determine whether the second maximum engine coolant temperature change range is less than the preset temperature threshold;

[0054] If no, it is determined that the engine coolant temperature sensor does not have a signal sticking fault;

[0055] If yes, step G is performed to perform a temperature lowering / temperature rising operation on the vehicle within a second preset time period, so that the vehicle enters a low-temperature working condition / high-temperature working condition, and a third maximum engine coolant temperature change range is obtained according to the maximum engine coolant temperature and the minimum engine coolant temperature detected by the engine coolant temperature sensor after the vehicle is started;

[0056] Step H is to determine whether the third maximum engine coolant temperature change range is less than the preset temperature threshold;

[0057] If no, it is determined that the engine coolant temperature sensor does not have a signal sticking fault;

[0058] If yes, it is determined that the engine coolant temperature sensor has a signal sticking fault.

[0059] The present application actively changes the temperature environment of the engine coolant, actively and quickly establishes a high-temperature working condition and a low-temperature working condition, so that it can quickly and accurately detect whether the engine coolant temperature sensor has a signal sticking fault, avoids false positives of the thermal management system, and solves the problem that it takes a long time to detect or even cannot detect that the engine coolant temperature sensor has a signal sticking fault for a long time. It should be noted that the temperature rising operation can be performed first and then the temperature lowering operation, or the temperature lowering operation can be performed first and then the temperature rising operation, and the sequence of the temperature rising operation and the temperature lowering operation is not limited. In an exemplary embodiment, the preset temperature threshold is 0.5 degrees Celsius, but it is not limited thereto.

[0060] Preferably, to prevent the method from being executed in the case of non-stuck signal fault, a first preset condition can be determined before the temperature rising\falling operation to exclude other conditions that can cause the engine coolant temperature change amplitude to be less than the preset temperature threshold, including but not limited to the absence of circuit fault of the engine coolant temperature sensor. The operator can also set other preset conditions as needed to make the vehicle engine coolant temperature sensor signal sticking detection method more reliable.

[0061] In an exemplary embodiment, when the vehicle is started, experiences a preset number of high-temperature working conditions during operation, and experiences a preset number of low-temperature working conditions during operation, if the first maximum engine coolant temperature change amplitude is less than the preset temperature threshold, steps E to H are directly executed.

[0062] In an exemplary embodiment, the temperature rising operation includes:

[0063] In the case of meeting the second preset condition, the cooling fan 21 and / or the thermostat 11 in the cooling circulation system of the vehicle are turned off. When the cooling fan 21 and the thermostat 11 are turned off, the coolant cannot be effectively cooled or even cannot enter the radiator 2, thereby increasing the temperature of the coolant.

[0064] Further, the second preset condition includes that the increase of the radiator coolant temperature detected by the radiator coolant temperature sensor of the vehicle reaches a first preset value after the temperature rising operation starts. By setting the second preset condition in this way, the essence is that in the temperature rising operation, the coolant temperature gradually rises to the opening temperature of the thermostat 11, and after the thermostat 11 is opened, the coolant enters the second cooling circulation loop 32. Therefore, when the increase of the radiator coolant temperature detected by the radiator coolant temperature sensor of the vehicle reaches the first preset value, it indicates that the thermostat 11 and the cooling fan 21 have participated in the cooling work, and on this basis, turning off the cooling fan 21 and / or the thermostat 11 in the cooling circulation system of the vehicle can effectively increase the temperature of the coolant.

[0065] Further, the second preset condition further comprises: the theoretical coolant temperature of the vehicle under the current working condition is greater than or equal to a second preset value. The theoretical coolant temperature of the vehicle is obtained by a large number of experimental records and analysis of the same vehicle model vehicle, which can be used as a corresponding reference for different working conditions of the vehicle. When the theoretical coolant temperature of the vehicle is greater than or equal to the second preset value, it can be determined that the vehicle has entered a high-temperature working condition. In combination with the condition that the rising amount of the radiator coolant temperature detected by the radiator coolant temperature sensor of the vehicle reaches the first preset value, it can be more clearly confirmed that the thermostat 11 and the cooling fan 21 have participated in the cooling work. On this basis, turning off the cooling fan 21 and / or the thermostat 11 in the cooling circulation system of the vehicle can effectively increase the temperature of the coolant. In an exemplary embodiment, the first preset value can be 20 degrees Celsius, and the second preset value can be 90 degrees Celsius, but it is not limited thereto.

[0066] In an exemplary embodiment, the cooling operation comprises:

[0067] controlling the cooling fan 21 in the cooling circulation system of the vehicle to operate at a maximum duty ratio, using the strong wind of the cooling fan to accelerate heat dissipation; and / or

[0068] controlling the thermostat 11 in the cooling circulation system of the vehicle to operate at a maximum flow effect state, so that the coolant fully enters the second cooling circulation circuit 32; and / or

[0069] controlling the electronic water pump 12 in the cooling circulation system of the vehicle to operate at a maximum duty ratio, so that the coolant circulation is accelerated to accelerate heat dissipation.

[0070] The above-mentioned methods can all achieve cooling of the coolant, thereby realizing the low-temperature working condition. After the above steps are completed, it is effectively detected and determined whether the engine coolant temperature sensor has a signal sticking fault.

[0071] To achieve the above-mentioned purposes, the present application further provides an electronic device, please refer to Figure 5 which schematically shows a block structure schematic diagram of an electronic device provided by an embodiment of the present application. As Figure 5As shown in the figure, the electronic device comprises a processor 101 and a memory 103, and the memory 103 stores a computer program, and the computer program is executed by the processor 101 to realize the vehicle engine coolant temperature sensor signal sticking detection method described above. Since the electronic device provided by the present application belongs to the same inventive concept as the vehicle engine coolant temperature sensor signal sticking detection method described above, the electronic device provided by the present application has all the advantages of the vehicle engine coolant temperature sensor signal sticking detection method described above, so the beneficial effects of the electronic device provided by the present application will not be described one by one here.

[0072] As shown in the figure, Figure 5 As shown in the figure, the electronic device further comprises a communication interface 102 and a communication bus 104, wherein the processor 101, the communication interface 102 and the memory 103 complete mutual communication through the communication bus 104. The communication bus 104 can be a peripheral component interconnect (PCI) bus or an extended industry standard architecture (EISA) bus, etc. The communication bus 104 can be divided into an address bus, a data bus, a control bus, etc. For the convenience of representation, only one thick line is shown in the figure, but it does not mean that there is only one bus or only one type of bus. The communication interface 102 is used for communication between the electronic device and other devices.

[0073] The processor 101 in the present application 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 gate or transistor logic devices, discrete hardware components, etc. The general-purpose processor can be a microprocessor or the processor can also be any conventional processor, etc. The processor 101 is the control center of the electronic device, and connects each part of the entire electronic device through various interfaces and lines.

[0074] The memory 103 can be used to store the computer program, and the processor 101 realizes various functions of the electronic device by running or executing the computer program stored in the memory 103 and calling the data stored in the memory 103.

[0075] The memory 103 can include non-volatile and / or volatile memory. Non-volatile memory can include read only memory (ROM), programmable ROM (PROM), electrically programmable ROM (EPROM), electrically erasable programmable ROM (EEPROM), or flash memory. Volatile memory can include random access memory (RAM), or external cache memory. By way of illustration, and not limitation, RAM is available in many forms such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDR SDRAM), enhanced SDRAM (ESDRAM), Synchlink DRAM (SLDRAM), Rambus DRAM (RDRAM), direct Rambus dynamic RAM (DRDRAM), and Rambus dynamic RAM (RDRAM) etc.

[0076] To achieve the above object, the present application further provides a vehicle, which comprises the electronic device described above. Since the vehicle provided by the present application belongs to the same inventive concept as the electronic device described above, the vehicle provided by the present application has all the advantages of the electronic device described above, and thus the beneficial effects of the vehicle provided by the present application will not be repeated here.

[0077] To achieve the above object, the present application further provides a readable storage medium, which stores a computer program, and when the computer program is executed by a processor, the vehicle engine coolant temperature sensor signal sticking detection method described above is realized. Since the readable storage medium provided by the present application belongs to the same inventive concept as the vehicle engine coolant temperature sensor signal sticking detection method described above, the readable storage medium provided by the present application has all the advantages of the vehicle engine coolant temperature sensor signal sticking detection method described above, and thus the beneficial effects of the readable storage medium provided by the present application will not be repeated here.

[0078] The readable storage medium of the embodiment of the present application can adopt any combination of one or more computer readable media. The readable medium can be a computer readable signal medium or a computer readable storage medium. The computer readable storage medium may, for example, but is not limited to, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, device or apparatus, or any combination thereof. More specific examples (non-exhaustive list) of the computer readable storage medium include an electrical connection having one or more wires, a portable computer diskette, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the above. In this context, a computer readable storage medium can be any tangible medium that contains or stores a program for use by or in connection with an instruction execution system, apparatus or device.

[0079] The computer readable signal medium can include a data signal propagated in baseband or propagated as a carrier wave in a propagated data signal, in which computer readable program code is embodied. Such propagated data signal can take a variety of forms, including but not limited to electro-magnetic, optical or any suitable combination thereof. The computer readable signal medium can also be any computer readable medium that is not a computer readable storage medium and that can communicate, propagate or transport program for use by or in connection with an instruction execution system, apparatus, or device. Program code embodied on a computer readable medium can be transmitted using any appropriate medium, including but not limited to wireless, wire line, optical fiber cable, RF, etc., or any suitable combination of the above.

[0080] It should be noted that the various embodiments described in the specification are progressive, and each embodiment focuses on the differences from other embodiments. The same or similar parts of each embodiment can be referred to each other. For the system disclosed by the embodiments, since it corresponds to the method disclosed by the embodiments, the description is relatively simple, and the relevant parts can be referred to the method part.

[0081] It should be noted that although the present application has been disclosed as above with the preferred embodiments, the above embodiments are not intended to limit the present application. For any skilled person in the art, many possible changes and modifications of the technical solutions of the present application can be made by using the disclosed technical content, or modified as equivalent embodiments of equivalent changes. Therefore, any simple modification, equivalent change and modification of the above embodiments made according to the technical essence of the present application without departing from the content of the technical solutions of the present application, all still belong to the protection scope of the technical solutions of the present application.

[0082] It should also be understood that the terms "first", "second", "third" and the like, used in the description and in the claims, are used to describe various elements, steps, steps, etc. and do not imply a logical or chronological order of one to the other, unless otherwise specified or indicated by the context.

[0083] In addition, it is to be appreciated that the terms "comprise", "comprising", "include", "including", "contain", "containing", "have", "having", "carry", "carrying", "comprised of", "comprising of", "including of", "consist of", "consisting of", "consists of", "have of", "having of", "carry of", "carrying of", "consist of", "consisting of", "consists of", "have of", "having of", "carry of", "carrying of", "consist of", "consisting of", "consists of", "have of", "having of", "carry of", "carrying of", "consist of", "consisting of", "consists of", "have of", "having of", "carry of", "carrying of", "consist of", "consisting of", "consists of", "have of", "having of", "carry of", "carrying of", "consist of", "consisting of", "consists of", "have of", "having of", "carry of", "carrying of", "consist of", "consisting of", "consists of", "have of", "having of", "carry of", "carrying of", "consist of", "consisting of", "consists of", "have of", "having of", "carry of", "carrying of", "consist of", "consisting of", "consists of", "have of", "having of", "carry of", "carrying of", "consist of", "consisting of", "consists of", "have of", "having of", "carry of", "carrying of", "consist of", "consisting of", "consists of", "have of", "having of", "carry of", "carrying of", "consist of", "consisting of", "consists of", "have of", "having of", "carry of", "carrying of", "consist of", "consisting of", "consists of", "have of", "having of", "carry of", "carrying of", "consist of", "consisting of", "consists of", "have of", "having of", "carry of

Claims

1. A vehicle engine coolant temperature sensor signal stick detection method, characterized by, The method comprises the following steps: Step A, after the vehicle is started, obtaining a maximum engine coolant temperature variation amplitude of the vehicle in real time according to a maximum engine coolant temperature and a minimum engine coolant temperature detected by an engine coolant temperature sensor of the vehicle; Step B, when the engine coolant temperature variation amplitude is no longer changed, taking the engine coolant temperature variation amplitude as a first maximum engine coolant temperature variation amplitude; Step C, judging whether the first maximum engine coolant temperature variation amplitude is less than a preset temperature threshold value; If not, it is determined that the engine coolant temperature sensor does not have a signal sticking fault; If yes, Step D is performed, that is, judging whether a current working condition of the vehicle meets a first preset condition; If yes, Step E is performed, that is, performing a temperature rising operation / temperature lowering operation on the vehicle within a first preset time period, so that the vehicle enters a high-temperature working condition / low-temperature working condition, and obtaining a second maximum engine coolant temperature variation amplitude according to a maximum engine coolant temperature and a minimum engine coolant temperature detected by the engine coolant temperature sensor since the vehicle is started; Step F, judging whether the second maximum engine coolant temperature variation amplitude is less than the preset temperature threshold value; If not, it is determined that the engine coolant temperature sensor does not have a signal sticking fault; If yes, Step G is performed, that is, performing a temperature lowering operation / temperature rising operation on the vehicle within a second preset time period, so that the vehicle enters a low-temperature working condition / high-temperature working condition, and obtaining a third maximum engine coolant temperature variation amplitude according to a maximum engine coolant temperature and a minimum engine coolant temperature detected by the engine coolant temperature sensor since the vehicle is started; Step H, judging whether the third maximum engine coolant temperature variation amplitude is less than the preset temperature threshold value; If not, it is determined that the engine coolant temperature sensor does not have a signal sticking fault; If yes, it is determined that the engine coolant temperature sensor has a signal sticking fault.

2. The vehicle engine coolant temperature sensor signal stick detection method of claim 1 wherein, The first preset condition comprises: The engine coolant temperature sensor does not have a circuit fault.

3. The vehicle engine coolant temperature sensor signal stick- slip detection method of claim 1 wherein, After the vehicle is started, if the first maximum engine coolant temperature variation amplitude is less than the preset temperature threshold value after the vehicle experiences a preset number of high-temperature working conditions in a running process and a preset number of low-temperature working conditions in a running process, Steps E to H are performed.

4. The vehicle engine coolant temperature sensor signal stick- slip detection method of claim 1 wherein, The temperature rising operation comprises: In a case where a second preset condition is met, turning off a cooling fan and / or a thermostat in a cooling circulation system of the vehicle.

5. The vehicle engine coolant temperature sensor signal stick- slip detection method of claim 4 wherein, The second preset condition comprises: After the temperature rising operation is started, an increase amount of a radiator coolant temperature detected by a radiator coolant temperature sensor of the vehicle reaches a first preset value.

6. The vehicle engine coolant temperature sensor signal stick- slip detection method of claim 5 wherein, The second preset condition further comprises: A theoretical coolant temperature of the vehicle in the current working condition is greater than or equal to a second preset value.

7. The vehicle engine coolant temperature sensor signal stick- slip detection method of claim 1 wherein, The temperature lowering operation comprises: Controlling the cooling fan in the cooling circulation system of the vehicle to run at a maximum duty cycle; and / or Controlling the thermostat in the cooling circulation system of the vehicle to run at a maximum flow effect state; and / or controlling an electronic water pump in a cooling circulation system of the vehicle to operate at a maximum duty cycle.

8. An electronic device, comprising: The vehicle engine coolant temperature sensor signal stick detection method of any one of claims 1 to 7 is implemented by a computer program stored on a storage medium and executed by a processor.

9. A readable storage medium, characterized by, The vehicle engine coolant temperature sensor signal stick detection method of any one of claims 1 to 7 is implemented by a computer program stored on a storage medium and executed by a processor.

10. A vehicle characterized by comprising: The electronic device of claim 8.

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