Radiator service life early warning method and system

Abstract

The invention belongs to the technical field of engineering machinery radiator application, and provides a radiator service life early warning method and system based on actual working condition statistical data. The early warning method comprises the steps that when a thermostat of an engine is started every time, the starting temperature of the thermostat, the temperature of cooling liquid in a water feeding chamber of a radiator and the starting duration time of the thermostat are obtained; for each starting of the thermostat, according to the difference value between the starting temperature of the thermostat and the temperature of the cooling liquid in the water feeding chamber of the radiator and the starting duration of the thermostat, the service life loss value generated by single-time cold and hot impact is determined; the life loss values generated when the thermostat is started each time are accumulated in sequence to obtain a life loss accumulation value; and when the life loss accumulation value reaches a preset threshold value, triggering early warning.

Description

Technical Field

[0001] The present invention belongs to the technical field of engineering machinery radiator application, and proposes a radiator life warning method and system based on actual working condition statistical data. Background Art

[0002] At the beginning of the start-up of the construction machinery, the engine is at room temperature. At this time, the thermostat wax is solid and the valve is pressed on the valve seat. At this time, the valve closes the water path to the radiator, and the cooling water from the engine cylinder head outlet flows back to the cylinder water jacket through the water pump for a small cycle. When the engine water temperature rises, the paraffin gradually becomes liquid, the volume increases accordingly, and the thermostat valve opens. When the engine water temperature reaches above 80℃, the thermostat valve gradually opens, and the cooling water from the cylinder head outlet flows to the radiator for a large cycle.

[0003] After the engine thermostat is opened for the first time, the coolant enters the upper water chamber of the radiator. At this time, the coolant temperature in the upper water chamber is the same as the ambient temperature. The coolant temperature in the engine body is much higher than the temperature in the upper water chamber, causing hot and cold shocks. The radiator body has a corresponding limit on the number of hot and cold shocks. When the limit is exceeded, the connection between the upper water chamber and the core will crack due to hot and cold shocks. The cause of this failure is due to hot and cold cycle stress. At the same time, the low-temperature coolant in the radiator flows into the engine body. If the temperature of the low-temperature coolant is too low, it will cause the thermostat to close again, thus entering a small cycle. After the coolant temperature in the engine body reaches the thermostat opening temperature, the high-temperature coolant enters the upper water chamber of the radiator, causing hot and cold shocks again.

[0004] In addition, in cold regions or winter, the engine thermostat opens frequently, and the frequency of hot and cold shock is high. The low ambient temperature will aggravate the concentration and accumulation of hot and cold shock strains, and failures will occur frequently. There is no early warning measure in the prior art that can actively warn that different degrees of hot and cold shock times will cause loss of radiator life. Summary of the invention

[0005] The object of the present invention is to provide a radiator life warning method and system, the method counts the number of times the thermostat is opened, and each time the thermostat is opened, collects the thermostat opening temperature and the coolant temperature in the radiator upper water chamber, and determines the radiator life loss value caused by a single hot and cold shock in combination with the temperature difference between the two and the opening duration of the thermostat, accumulates the life loss values ​​of multiple thermostat openings to obtain a life loss accumulation value, and uses the life loss accumulation value as a triggering basis for life warning, thereby achieving the purpose of timely warning and replacement when the radiator life loss is serious to ensure safe use.

[0006] In order to achieve the above object, the present invention adopts the following technical solution to solve the problem: In a first aspect, the present invention provides a radiator life warning method, which comprises: Each time the engine thermostat is opened, the thermostat opening temperature, the coolant temperature in the radiator water supply chamber and the opening duration of the thermostat are obtained; For each opening of the thermostat, the life loss value caused by a single hot and cold shock is determined based on the difference between the thermostat opening temperature and the coolant temperature in the radiator upper water chamber and the opening duration of the thermostat; The life loss value generated each time the thermostat is opened is accumulated in sequence to obtain the life loss accumulation value; When the accumulated life loss value reaches a preset threshold, an early warning is triggered.

[0007] Optionally, the calculation formula of the life loss value is: △T=T 节 -T 散 S n =f (△T n , t n ) In the formula, △T represents the difference between the thermostat opening temperature and the coolant temperature in the radiator water chamber, T 节 Indicates the thermostat opening temperature, T 散 Indicates the coolant temperature in the radiator water chamber, n indicates the number of times the thermostat is opened, S n Indicates the life loss value caused by a single hot and cold shock when the thermostat is opened for the nth time, △T n It represents the difference between the thermostat opening temperature and the coolant temperature in the radiator upper water chamber when the thermostat is opened for the nth time, t n Indicates the duration of the nth thermostat opening to closing.

[0008] Optionally, the calculation formula for accumulating the life loss value generated each time the thermostat is opened to obtain the life loss accumulation value is: S m =S1+S2+S3+S4+……+S n In the formula, S m Indicates the accumulated value of life loss.

[0009] Optionally, the method further comprises: Get the coolant temperature at the engine thermostat; If the coolant temperature at the engine thermostat is equal to the coolant temperature in the radiator upper water chamber and the thermostat does not close for more than a preset time, the thermostat opening count is stopped and the accumulation of the life loss accumulation value is stopped.

[0010] Optionally, the method further comprises: Divide the difference between the thermostat opening temperature and the coolant temperature in the radiator upper water chamber into multiple intervals, and set a corresponding weight coefficient for each interval; For each opening of the thermostat, the weight coefficient of the life loss value caused by the thermal shock is determined according to the interval to which the difference between the thermostat opening temperature and the coolant temperature in the radiator upper water chamber belongs; The life loss value generated each time the thermostat is opened is weighted and accumulated in sequence to obtain the life loss accumulation value.

[0011] Optionally, the higher the interval to which the difference between the thermostat opening temperature and the coolant temperature in the upper water chamber of the radiator belongs, the greater the corresponding weight coefficient.

[0012] Optionally, the multiple intervals include (0,10], (10,20], (20,30], (30,40], (40,50], (50,60], (60,70], (70,80], (80,90], (90,100], and the unit of the boundary value of each interval is °C.

[0013] Optionally, the method further comprises: Divide the difference between the thermostat opening temperature and the coolant temperature in the radiator upper water chamber into a plurality of intervals, and set a corresponding second weight coefficient for each interval; Determining a second life loss accumulation value according to the number of times the difference between the thermostat opening temperature and the coolant temperature in the radiator upper water chamber belongs to each interval and a second weight coefficient of each interval; When the second life loss accumulation value reaches the corresponding preset threshold, an early warning is triggered.

[0014] Optionally, the calculation formula of the second life loss accumulation value is: Where S a Indicates the accumulated loss value of the second life, A i represents the second weight coefficient corresponding to the i-th interval, , N i Indicates the number of thermostat openings that the difference between the thermostat opening temperature and the coolant temperature in the radiator upper water chamber belongs to the i-th interval.

[0015] In a second aspect, the present invention provides a radiator life warning system, which comprises: An acquisition module, used for acquiring the thermostat opening temperature, the coolant temperature in the radiator water supply chamber and the opening duration of the thermostat each time the thermostat of the radiator is opened; A determination module, for determining the life loss value caused by a single hot / cold shock for each opening of the thermostat according to the difference between the thermostat opening temperature and the coolant temperature in the radiator upper water chamber and the opening duration of the thermostat; An accumulation module is used to accumulate the life loss value generated each time the thermostat is opened to obtain a life loss accumulation value; The early warning module is used to trigger an early warning when the accumulated life loss value reaches a preset threshold.

[0016] Compared with the prior art, the present invention has the following beneficial effects: The present invention counts the number of times the thermostat is opened, and each time the thermostat is opened, the life loss value caused by a single hot or cold shock is estimated by the difference between the thermostat opening temperature and the coolant temperature in the radiator upper water chamber and the opening duration of the thermostat, and the quantified life loss accumulation value is accumulated as a basis for judging the life loss warning, so that an early warning can be issued in time when the life loss is serious and the radiator can be reserved in advance for replacement, thereby ensuring the safe operation of the radiator. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a flow chart of a radiator life warning method in Example 1.

[0018] Figure 2 This is a schematic diagram of the principle of an engineering machinery to which a radiator life warning method in Example 1 is applied. DETAILED DESCRIPTION

[0019] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and the like are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", and the like may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more. In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0020] In the prior art known to the inventor of the present application, the thermostat is frequently opened in the early stage of equipment startup in severe cold regions, and the frequency of thermal shock is high. Therefore, the lower the ambient temperature, the more severe the impact of a single thermal shock. As the thermal strain concentrates and accumulates, the occurrence of radiator cracking failure is accelerated, and the failure position is usually located near the engine water outlet pipe in the radiator upper water chamber.

[0021] The present invention will be further described below in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and cannot be used to limit the protection scope of the present invention.

[0022] Example 1 Combination Figure 1 The present embodiment provides a radiator life warning method, which includes: step S1, obtaining the thermostat opening temperature, the coolant temperature in the radiator water chamber and the opening duration of the thermostat each time the engine thermostat is opened.

[0023] Specifically describing the application scenario of the early warning method of this embodiment, the early warning method of this embodiment is applied to a construction machinery, which includes an upper water chamber water temperature sensor, an engine water temperature sensor, a vehicle controller, a remote service platform and a spare parts purchasing platform, for realizing the early warning function. Among them, the thermostat opening temperature and the coolant temperature in the upper water chamber of the radiator are both detected and collected by the sensor. As for the coolant, the purpose of the coolant (antifreeze) is that heat is generated when the engine is running, and the coolant can take away the heat by flowing through the engine water jacket; the thermostat is installed in the cooling water circulation passage (generally installed at the water outlet of the cylinder head), and automatically changes the water circulation flow route (small and large circulation switching) according to the temperature of the engine coolant, so as to adjust the cooling intensity of the cooling system; the radiator can cool the engine coolant through the engine large circulation; at the same time, the water pump can ensure that the coolant circulates in the cooling system; specifically, the small circulation means that the coolant in the engine water jacket flows back to the cylinder water jacket through the water pump for a small circulation, which is actually a cooling circulation inside the engine; the large circulation means that the thermostat is opened, and the engine coolant flows to the radiator through the thermostat, and then returns to the engine water jacket for a large circulation. The thermostat opening and closing counter can collect the number of times the thermostat is closed and opened, so as to count the number of times the radiator thermostat is opened. When T 发 < T 节 When T is low, the thermostat is closed and the engine coolant only circulates in a small cycle. At this time, the radiator is not subjected to thermal shock. The coolant in the small cycle does not pass through the radiator, while the coolant in the large cycle does. 发 ≥ T 节When the thermostat opens, the engine coolant enters the large circulation, and the high-temperature coolant enters the radiator. At this time, the radiator is subjected to a cold and hot shock. The low-temperature coolant in the radiator enters the engine, causing the coolant temperature in the engine to be lower than the thermostat opening temperature T 节 , the thermostat closes, and the engine coolant circulates again. When the engine coolant temperature is higher than the thermostat opening temperature T 节 , the coolant enters the large circulation again, and the radiator is subjected to hot and cold shocks. This cycle repeats until the opening temperature of the engine thermostat is equivalent to the coolant temperature in the radiator, after which the thermostat is in a normally open state. The early warning method of this embodiment is mainly aimed at the life loss caused by the hot and cold shocks when the thermostat is opened in the large cycle. The number of times the radiator is subjected to hot and cold shocks can be characterized by counting the number of times the thermostat is opened. The early warning method in this embodiment is based on the vehicle controller: the vehicle controller collects the number of times the thermostat is opened and the corresponding coolant temperature in the upper water chamber of the radiator, and will evaluate the remaining life warning of the radiator's resistance to hot and cold shocks according to the preset logic calculation, and send the early warning information to the remote intelligent platform. The specific logic calculation method is as follows.

[0024] Step S2, for each opening of the thermostat, according to the difference between the thermostat opening temperature and the coolant temperature in the radiator upper water chamber and the opening duration of the thermostat, determine the life loss value caused by a single hot and cold shock; In a specific embodiment, the calculation formula of the life loss value is: △T=T 节 -T 散 S n =f (△T n , t n ) In the formula, △T represents the difference between the thermostat opening temperature and the coolant temperature in the radiator water chamber, T 节 Indicates the thermostat opening temperature, T 散 Indicates the coolant temperature in the radiator water chamber, n indicates the number of times the thermostat is opened, S n Indicates the life loss value caused by the thermal shock when the thermostat is opened for the nth time, △T n It represents the difference between the thermostat opening temperature and the coolant temperature in the radiator upper water chamber when the thermostat is opened for the nth time, t n Indicates the duration of the nth thermostat opening to closing, in seconds or minutes.

[0025] The life loss value in this embodiment is obtained based on model calculation, and the pre-built single hot and cold shock life loss analysis model is trained based on historical working condition data to obtain the life loss value S caused by a single hot and cold shock. n With △T n ,tn The relationship function, that is, S n =f(△T n ,t n ). For example, S1=f(△T1,t1) represents the life loss of the first thermal shock. After the model training is completed, the life loss value S generated by each single thermal shock can be calculated based on the current working condition data (the difference between the thermostat opening temperature and the coolant temperature in the radiator upper water chamber and the time from the thermostat opening to closing). n , the unit is h (hour). Among them, n represents the nth hot and cold shock, that is, n is equal to the number of times the thermostat is opened, and the value range of n is 1, 2, 3...

[0026] And, when T 散 =T 发 If the thermostat does not close for more than the preset time t0 minutes, it means that the equipment has basically entered a thermal equilibrium state, the radiator is no longer subjected to hot and cold shocks, the counting of the number of times the radiator thermostat is opened stops, and the accumulation of the accumulated life loss value also stops.

[0027] Step S3, the life loss value generated each time the thermostat is opened is accumulated to obtain the life loss accumulation value; the calculation formula of the life loss accumulation value is: S m =S1+S2+S3+S4+……+S n； In the formula, S m Represents the accumulated life loss value, S n It indicates the life loss value caused by the thermal shock when the thermostat is opened for the nth time; In another specific embodiment, the difference between the thermostat opening temperature and the coolant temperature in the upper water chamber of the radiator is divided into multiple intervals, and the multiple intervals include (0, 10], (10, 20], (20, 30], (30, 40], (40, 50], (50, 60], (60, 70], (70, 80], (80, 90], (90, 100], and the unit of the boundary value of each interval is ° C. A corresponding weight coefficient is set for each interval; for each opening of the thermostat, the weight coefficient of the life loss value is determined according to the interval to which the difference between the thermostat opening temperature and the coolant temperature in the upper water chamber of the radiator belongs; the life loss value generated by each opening of the thermostat is weighted and summed to obtain the life loss accumulation value. Among them, the higher the interval to which the difference between the thermostat opening temperature and the coolant temperature in the upper water chamber of the radiator belongs, the larger the corresponding weight coefficient. That is, in the calculation formula of the life loss accumulation value, S1, S2, S3..., S nThe weight coefficients are all multiplied by corresponding weight coefficients for summation calculation, and the weight coefficients are determined according to the interval to which the difference between the thermostat opening temperature and the coolant temperature in the upper water chamber of the radiator belongs. This embodiment uses weighted summation to make the calculation result of the life loss accumulation value more realistic to reflect the real situation.

[0028] Step S4: When the accumulated life loss value reaches a preset threshold, an early warning is triggered. The specific value of the preset threshold can be set according to the actual situation. Usually, the early warning will be sent to the remote service platform. After receiving the early warning, the remote service platform will issue a purchase instruction to the spare parts purchasing platform to reserve radiators.

[0029] In another specific embodiment, a second life loss accumulation value is also calculated for auxiliary warning. When either of the life loss accumulation value and the second life loss accumulation value reaches the corresponding preset threshold, the warning is triggered. The cooperation of the two calculation methods can ensure that the warning is triggered in time when the life loss of the radiator is serious. The calculation method of the second life loss accumulation value includes: dividing the difference between the thermostat opening temperature and the coolant temperature in the upper water chamber of the radiator into multiple intervals, and setting a corresponding second weight coefficient for each interval; determining the second life loss accumulation value according to the number of times the difference between the thermostat opening temperature and the coolant temperature in the upper water chamber of the radiator belongs to each interval and the second weight coefficient of each interval; since the difference between the thermostat opening temperature and the coolant temperature in the upper water chamber of the radiator has a greater impact on the cold and hot shock, the greater the temperature difference, the greater the life loss of a single cold and hot shock. This calculation method takes the temperature difference as the core consideration, and determines the second life loss accumulation value according to the number of times the temperature difference belongs to each interval. In this embodiment, the calculation formula of the second life loss accumulation value is: Where S a Indicates the accumulated loss value of the second life, A i represents the second weight coefficient corresponding to the i-th interval, , N i Indicates the number of thermostat openings in the ith interval when the difference between the thermostat opening temperature and the coolant temperature in the radiator upper water chamber belongs to.

[0030] This embodiment characterizes the life loss degree of the radiator through two calculation methods, so as to ensure that when the life loss of the radiator reaches a dangerous level, an early warning is triggered in time and the radiator is replaced in time to ensure the safe use of the radiator. Example 2

[0031] Based on the same inventive concept as in Example 1, this embodiment provides a radiator life warning system, which includes: An acquisition module, used for acquiring the thermostat opening temperature, the coolant temperature in the radiator water supply chamber and the opening duration of the thermostat each time the thermostat of the radiator is opened; A determination module, for determining the life loss value caused by a single hot / cold shock for each opening of the thermostat according to the difference between the thermostat opening temperature and the coolant temperature in the radiator upper water chamber and the opening duration of the thermostat; An accumulation module is used to accumulate the life loss value generated each time the thermostat is opened to obtain a life loss accumulation value; The early warning module is used to trigger an early warning when the accumulated life loss value reaches a preset threshold.

[0032] It will be appreciated by those skilled in the art that embodiments of the present invention may be provided as methods, systems, or computer program products. Therefore, the present invention may take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Furthermore, the present invention may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0033] The present invention is described with reference to flowcharts and / or block diagrams of methods, devices (systems), and computer program products according to embodiments of the present invention. It should be understood that each process and / or block in the flowchart and / or block diagram, as well as the combination of processes and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0034] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0035] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 A step that specifies a function in one or more boxes.

[0036] The embodiments of the present invention are described above in conjunction with the accompanying drawings, but the present invention is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the enlightenment of the present invention, ordinary technicians in this field can also make many forms without departing from the scope of protection of the purpose of the present invention and the claims, which all fall within the protection of the present invention.

Claims

1. A radiator life warning method, characterized in that: include: Each time the engine thermostat is opened, the thermostat opening temperature, the coolant temperature in the radiator water chamber and the opening duration of the thermostat are obtained; For each opening of the thermostat, the life loss value caused by a single hot and cold shock is determined based on the difference between the thermostat opening temperature and the coolant temperature in the radiator upper water chamber and the opening duration of the thermostat; The life loss value generated each time the thermostat is opened is accumulated in sequence to obtain the life loss accumulation value; When the accumulated life loss value reaches a preset threshold, an early warning is triggered.

2. The radiator life warning method according to claim 1, characterized in that: The calculation formula of the life loss value is: △T=T 节 - T 散 S n =f (△T n ,t n ) In the formula, △T represents the difference between the thermostat opening temperature and the coolant temperature in the radiator water chamber, T 节 Indicates the thermostat opening temperature, T 散 Indicates the coolant temperature in the radiator water chamber, n indicates the number of times the thermostat is opened, S n Indicates the life loss value caused by a single hot and cold shock when the thermostat is opened for the nth time, △T n It represents the difference between the thermostat opening temperature and the coolant temperature in the radiator upper water chamber when the thermostat is opened for the nth time, t n Indicates the duration of the nth thermostat opening to closing.

3. The radiator life warning method according to claim 2, characterized in that: The calculation formula for accumulating the life loss value generated by each opening of the thermostat to obtain the life loss accumulation value is: S m =S1+S2+S3+S4+……+S n In the formula, S m Indicates the accumulated value of life loss.

4. The radiator life warning method according to claim 1, characterized in that: The method further comprises: Get the coolant temperature at the engine thermostat; If the coolant temperature at the engine thermostat is equal to the coolant temperature in the radiator upper water chamber and the thermostat does not close for more than a preset time, the thermostat opening count is stopped and the accumulation of the life loss accumulation value is stopped.

5. The radiator life warning method according to claim 1, characterized in that: The method further comprises: Divide the difference between the thermostat opening temperature and the coolant temperature in the radiator upper water chamber into multiple intervals, and set a corresponding weight coefficient for each interval; For each opening of the thermostat, the weight coefficient of the life loss value caused by the thermal shock is determined according to the interval to which the difference between the thermostat opening temperature and the coolant temperature in the radiator upper water chamber belongs; The life loss value generated each time the thermostat is opened is weighted and accumulated in sequence to obtain the life loss accumulation value.

6. The radiator life warning method according to claim 5, characterized in that: The higher the interval to which the difference between the thermostat opening temperature and the coolant temperature in the radiator upper water chamber belongs, the greater the corresponding weight coefficient.

7. The radiator life warning method according to claim 5, characterized in that: The multiple intervals include (0,10], (10,20], (20,30], (30,40], (40,50], (50,60], (60,70], (70,80], (80,90], (90,100], and the unit of the boundary value of each interval is °C.

8. The radiator life warning method according to claim 1, characterized in that: The method further comprises: Divide the difference between the thermostat opening temperature and the coolant temperature in the radiator upper water chamber into a plurality of intervals, and set a corresponding second weight coefficient for each interval; Determining a second life loss accumulation value according to the number of times the difference between the thermostat opening temperature and the coolant temperature in the radiator upper water chamber belongs to each interval and a second weight coefficient of each interval; When the second life loss accumulation value reaches the corresponding preset threshold, an early warning is triggered.

9. The radiator life warning method according to claim 8, characterized in that: The calculation formula of the second life loss accumulation value is: Where S a Indicates the accumulated loss value of the second life, A i represents the second weight coefficient corresponding to the i-th interval, , N i Indicates the number of thermostat openings that the difference between the thermostat opening temperature and the coolant temperature in the radiator upper water chamber belongs to the i-th interval.

10. A radiator life warning system, characterized in that: include: An acquisition module, used for acquiring the thermostat opening temperature, the coolant temperature in the radiator water supply chamber and the opening duration of the thermostat each time the thermostat of the radiator is opened; A determination module, for determining the life loss value caused by a single hot / cold shock for each opening of the thermostat according to the difference between the thermostat opening temperature and the coolant temperature in the radiator upper water chamber and the opening duration of the thermostat; An accumulation module is used to accumulate the life loss value generated each time the thermostat is opened to obtain a life loss accumulation value; The early warning module is used to trigger an early warning when the accumulated life loss value reaches a preset threshold.

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