A control method, device, equipment and storage medium for an electronic thermostat

Abstract

The present invention discloses a control method, device, equipment and storage medium for an electronic thermostat. The method includes: comparing the actual temperature of the coolant in the engine with a first preset temperature; when the actual temperature is less than the first preset temperature, determining the signal duty ratio based on a first control strategy; when the actual temperature is greater than or equal to the first preset temperature, determining the signal duty ratio based on a second control strategy; determining a control signal according to the signal duty ratio, and controlling the operation of the electronic thermostat based on the control signal. The determination strategy for determining the signal duty ratio according to the comparison result between the actual temperature of the coolant in the engine and the first preset temperature is the first control strategy or the second control strategy. After determining the signal duty ratio according to the first control strategy or the second control strategy, the electronic thermostat valve is controlled to open or close based on the control signal corresponding to the signal duty ratio, so as to realize intelligent control of the electronic thermostat on the premise of reducing hardware damage.

Description

Technical Field

[0001] The embodiments of the present invention relate to the technical field of engines, and in particular, to a control method, device, equipment and storage medium for an electronic thermostat. Background Art

[0002] Engine thermal management technology is an important technical means to improve the power density of engines and an important direction for the intelligent development of engine control. Advanced engine thermal management technology can enable the engine to operate within the optimal temperature range under different working conditions, thereby improving indicators such as engine fuel economy, power performance, vehicle ride comfort, and emissions. Engine thermal management technology can be achieved through the engine cooling system, which includes an electronic thermostat and an engine control unit. The electronic thermostat is installed in the engine coolant circulation path. The engine control unit can control the opening and closing of the electronic thermostat valve according to the actual temperature and target temperature of the coolant, so as to change the circulation range of the coolant, adjust the heat dissipation capacity of the engine cooling system, ensure that the engine operates within a suitable temperature range, and play a role in saving energy.

[0003] In the prior art, when the actual temperature of the coolant is greater than the target temperature, the engine control unit outputs a control signal with a certain duty cycle to the electronic thermostat, and the duty cycle of the control signal increases proportionally with the temperature difference between the actual temperature and the target temperature. After receiving the control signal, the heating rod inside the electronic thermostat generates heat, and the solid paraffin gradually melts. During the melting process of the paraffin, the volume also increases, which can open the valve of the electronic thermostat and allow the coolant to enter the radiator to achieve engine cooling.

[0004] However, when the actual temperature of the coolant is greater than the target temperature, the engine control unit continuously outputs a control signal with a certain duty cycle to the electronic thermostat. When the temperature difference between the actual temperature and the target temperature is large, the duty cycle increases accordingly, causing the heating rod inside the electronic thermostat to keep generating heat and the paraffin to expand continuously, resulting in the opening lift of the electronic thermostat becoming larger and larger. When it exceeds the maximum safe lift, the inner wall of the rubber ring contacts the heating area of the heating rod, which will cause the rubber ring to be damaged by heat. Summary of the Invention

[0005] The present invention provides a control method, device, equipment and storage medium for an electronic thermostat, which can achieve intelligent control of the electronic thermostat without damaging the hardware of the electronic thermostat.

[0006] In a first aspect, an embodiment of the present invention provides a control method for an electronic thermostat, including:

[0007] Comparing the actual temperature of the coolant in the engine with a first preset temperature;

[0008] When the actual temperature is less than the first preset temperature, determine the signal duty cycle based on the first control strategy;

[0009] When the actual temperature is greater than or equal to the first preset temperature, determine the signal duty cycle based on the second control strategy;

[0010] Determine the control signal according to the signal duty cycle, and control the operation of the electronic thermostat based on the control signal.

[0011] Further, determining the signal duty cycle based on the first control strategy includes:

[0012] Compare the actual temperature of the coolant with the target temperature; if the actual temperature is greater than the target temperature, determine the signal duty cycle according to the difference between the actual temperature and the target temperature; if the actual temperature is less than or equal to the target temperature, determine the signal duty cycle to be 0.

[0013] Further, determining the signal duty cycle based on the second control strategy includes:

[0014] If the actual temperature is equal to the first preset temperature, determine the signal duty cycle to be the intermediate duty cycle; otherwise; compare the actual temperature with the second preset temperature; when the actual temperature is less than the second preset temperature, determine the signal duty cycle according to the difference between the actual temperature and the first preset temperature; when the actual temperature is greater than or equal to the second preset temperature, determine the signal duty cycle to be 0.

[0015] Further, determining the control signal according to the signal duty cycle includes:

[0016] Determine the pulse width modulation PWM signal corresponding to the signal duty cycle as the control signal.

[0017] Further, the electronic thermostat includes: a heating rod, paraffin wax, and a valve.

[0018] Further, when the signal duty cycle is 0, controlling the operation of the electronic thermostat based on the control signal includes:

[0019] Based on the control signal, control the electronic thermostat to close the valve.

[0020] Further, when the signal duty cycle is not 0, controlling the operation of the electronic thermostat based on the control signal includes:

[0021] Based on the signal duty cycle of the control signal, determine the heating efficiency of the heating rod in the electronic thermostat, and based on the heating efficiency, control the heating rod to generate heat, melt the paraffin wax while increasing the volume of the paraffin wax, and open the valve based on the paraffin wax.

[0022] The technical solution of the embodiment of the present invention provides a control method for an electronic thermostat, including: comparing the actual temperature of the coolant in the engine with a first preset temperature; when the actual temperature is less than the first preset temperature, determining the signal duty ratio based on a first control strategy; when the actual temperature is greater than or equal to the first preset temperature, determining the signal duty ratio based on a second control strategy; determining a control signal according to the signal duty ratio, and controlling the operation of the electronic thermostat based on the control signal. Through the comparison result obtained by comparing the actual temperature of the coolant with the first preset temperature, the determination strategy of the signal duty ratio can be determined. When the actual temperature is less than the first preset temperature, the signal duty ratio can be determined based on the first control strategy, that is, when the actual temperature is less than or equal to the target temperature, the signal duty ratio of the control signal is determined to be 0. When the actual temperature is greater than the target temperature, the signal duty ratio of the control signal is determined according to the difference between the actual temperature and the target temperature, and the greater the difference, the greater the signal duty ratio of the control signal. When the actual temperature is greater than or equal to the first preset temperature, the signal duty ratio is determined based on the second control strategy, that is, when the actual temperature is equal to the first preset temperature, the signal duty ratio of the control signal is determined to be a preset duty ratio. When the actual temperature is greater than the first preset temperature and less than the second preset temperature, the signal duty ratio of the control signal is determined according to the difference between the actual temperature and the first preset temperature, and the greater the difference, the smaller the signal duty ratio of the control signal. When the actual temperature is greater than the second preset temperature, the signal duty ratio of the control signal is determined to be 0. Furthermore, the control signal can be determined according to the signal duty ratio, and the opening or closing of the electronic thermostat valve can be controlled based on the control signal, realizing the intelligent control of the electronic thermostat.

[0023] In a second aspect, the embodiment of the present invention further provides a control device for an electronic thermostat, including:

[0024] A comparison module, configured to compare the actual temperature of the coolant in the engine with a first preset temperature;

[0025] A first determination module, configured to determine the signal duty ratio based on a first control strategy when the actual temperature is less than the first preset temperature;

[0026] A second determination module, configured to determine the signal duty ratio based on a second control strategy when the actual temperature is greater than or equal to the first preset temperature;

[0027] An execution module, configured to determine a control signal according to the signal duty ratio, and control the operation of the electronic thermostat based on the control signal.

[0028] In a third aspect, the embodiment of the present invention further provides an electronic device, including:

[0029] At least one processor; and a memory communicatively connected to the at least one processor;

[0030] Wherein, the memory stores a computer program executable by the at least one processor, and the computer program is executed by the at least one processor to enable the at least one processor to execute the control method of the electronic thermostat according to any one of the first aspect.

[0031] Fourthly, an embodiment of the present invention further provides a storage medium containing computer-executable instructions, and the computer-executable instructions are used to execute the control method of the electronic thermostat according to any one of the first aspect when executed by a computer processor.

[0032] Fifthly, the present application provides a computer program product, and the computer program product includes computer instructions, and when the computer instructions run on a computer, the computer is enabled to execute the control method of the electronic thermostat provided in the first aspect.

[0033] It should be noted that the above computer instructions may be stored in whole or in part on a computer-readable storage medium. Among them, the computer-readable storage medium may be packaged together with the processor of the control device of the electronic thermostat, or may be separately packaged from the processor of the control device of the electronic thermostat, and the present application does not make any limitation thereto.

[0034] The descriptions of the second aspect, the third aspect, the fourth aspect and the fifth aspect in the present application may refer to the detailed description of the first aspect; and the beneficial effects of the descriptions of the second aspect, the third aspect, the fourth aspect and the fifth aspect may refer to the analysis of the beneficial effects of the first aspect, and will not be elaborated herein.

[0035] In the present application, the names of the above control devices of the electronic thermostat do not constitute a limitation to the devices or functional modules themselves. In actual implementation, these devices or functional modules may appear under other names. As long as the functions of each device or functional module are similar to those of the present application and fall within the scope of the claims of the present application and their equivalent technologies.

[0036] These aspects or other aspects of the present application will be more clearly understood in the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0038] Figure 1It is a schematic structural diagram of an electronic thermostat;

[0039] Figure 2 It is a flowchart of a control method for an electronic thermostat provided by an embodiment of the present invention;

[0040] Figure 3 It is an implementation flowchart of a control method for an electronic thermostat provided by an embodiment of the present invention

[0041] Figure 4 It is a schematic structural diagram of a control device for an electronic thermostat provided by an embodiment of the present invention;

[0042] Figure 5 It is a schematic structural diagram of an electronic device provided by an embodiment of the present invention. Detailed implementation manners

[0043] The present invention will be further described in detail below with reference to the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present invention, rather than limiting the present invention. Additionally, it should be noted that for the convenience of description, only parts related to the present invention rather than all structures are shown in the drawings.

[0044] The term "and / or" in this article is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone.

[0045] The terms "first" and "second" in the description of this application and the drawings are used to distinguish different objects or different treatments of the same object, rather than to describe the specific order of the objects.

[0046] In addition, the terms "including" and "having" and any variations thereof mentioned in the description of this application are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but optionally further includes other steps or units not listed, or optionally further includes other steps or units inherent to these processes, methods, products or devices.

[0047] Before discussing the exemplary embodiments in more detail, it should be noted that some exemplary embodiments are described as processes or methods depicted as flowcharts. Although the flowcharts depict operations (or steps) as sequential processes, many of the operations can be implemented in parallel, concurrently, or simultaneously. In addition, the order of the operations can be rearranged. The process can be terminated when its operations are completed, but there can also be additional steps not included in the drawings. The process can correspond to a method, function, procedure, subroutine, subprogram, etc. In addition, the embodiments in the present invention and the features in the embodiments can be combined with each other without conflict.

[0048] It should be noted that in the embodiments of the present application, words such as "exemplary" or "for example" are used to represent examples, illustrations, or explanations. Any embodiment or design solution described as "exemplary" or "for example" in the embodiments of the present application should not be construed as being more preferred or having more advantages than other embodiments or design solutions. Rather, the use of words such as "exemplary" or "for example" is intended to present the relevant concepts in a specific manner.

[0049] In the description of the present application, unless otherwise specified, "a plurality of" means two or more.

[0050] In the prior art, the control strategy of the engine cooling system is as follows: compare the actual temperature of the coolant with the target temperature. When the actual temperature is greater than the target temperature, determine the duty ratio of the control signal according to the difference between the actual temperature and the target temperature, determine the control signal according to the duty ratio, and send the control signal to the electronic thermostat so that the electronic thermostat controls the opening of the electronic thermostat valve based on the control signal and inputs the coolant into the cooling cycle. When the actual temperature is less than or equal to the target temperature, determine that the duty ratio of the control signal is 0 according to the difference between the actual temperature and the target temperature, determine the control signal with a duty ratio of 0, and send the control signal with a duty ratio of 0 to the electronic thermostat so that the electronic thermostat controls the closing of the electronic thermostat valve based on the control signal with a duty ratio of 0 and stops inputting the coolant into the cooling cycle. The target temperature here can be understood as a preset temperature related to the engine model. When the temperature of the coolant is the target temperature, the engine can achieve the best thermal efficiency and the best fuel economy.

[0051] Figure 1 is a schematic structural diagram of an electronic thermostat, as Figure 1 shown, after the electronic thermostat receives the control signal, the heating rod inside the electronic thermostat generates heat, the solid paraffin gradually melts into a liquid, the volume of the paraffin increases accordingly, generating a force to overcome the spring force to open the electronic thermostat valve, so that the coolant enters the radiator to achieve the purpose of cooling.

[0052] The actual temperature of the coolant is greater than the target temperature. The engine control unit continuously outputs a control signal with a certain duty cycle to the electronic thermostat. When the temperature difference between the actual temperature and the target temperature is large, the duty cycle increases accordingly, and can even increase to 100%. At this time, the control signal with a duty cycle of 100% will cause the heating rod inside the electronic thermostat to keep heating, the volume of the paraffin wax expands continuously, and the opening lift of the electronic thermostat becomes larger and larger. When it exceeds the maximum safe lift, the inner wall of the rubber ring contacts the heating area of the heating rod, which will cause the rubber ring to be damaged by heat.

[0053] Therefore, the present application proposes a control method for an electronic thermostat to achieve intelligent control of the electronic thermostat on the premise of avoiding hardware damage to the electronic thermostat.

[0054] Figure 2 As shown in the flowchart of a control method for an electronic thermostat provided by an embodiment of the present invention, this embodiment is applicable to situations where hardware damage to the electronic thermostat needs to be reduced. This method can be executed by a control device of the electronic thermostat, such as Figure 1 shown, and specifically includes the following steps:

[0055] Step 210: Compare the actual temperature of the coolant in the engine with a first preset temperature.

[0056] The actual temperature can be understood as the real-time temperature of the coolant in the engine. The first preset temperature can be understood as the temperature for determining the signal duty cycle of the control signal, that is, when the actual temperature is less than the first preset temperature, the signal duty cycle of the control signal is determined based on the first control strategy, and when the actual temperature is greater than the first preset temperature, the signal duty cycle of the control signal is determined based on the second control strategy.

[0057] When determining the signal duty cycle of the control signal based on the existing signal duty cycle determination strategy, the greater the difference between the actual temperature and the target temperature, the greater the signal duty cycle of the control signal. In order to avoid the signal duty cycle of the control signal being at a relatively high percentage for a long time, the actual temperature corresponding to when the signal duty cycle reaches a relatively high percentage when determining the signal duty cycle of the control signal based on the existing signal duty cycle determination strategy can be determined as the first preset temperature.

[0058] The relatively high percentage can be determined according to actual needs. In the present application, it can be determined that the actual temperature corresponding to when the signal duty cycle reaches a relatively high preset percentage when determining the signal duty cycle of the control signal based on the existing signal duty cycle determination strategy is 100°C. That is, the first preset temperature can be determined to be 100°C.

[0059] When the actual temperature is less than the first preset temperature, the duty cycle of the control signal can be determined based on the existing duty cycle determination strategy. When the actual temperature is greater than or equal to the first preset temperature, if the duty cycle of the control signal is still determined based on the existing duty cycle determination strategy, the determined duty cycle will always be at a relatively high percentage. Therefore, it is necessary to change the duty cycle determination strategy.

[0060] Specifically, the actual temperature of the coolant in the engine can be obtained based on a temperature sensor arranged in the coolant circulation. The first preset temperature can be determined according to the existing duty cycle determination strategy, and then the actual temperature and the first preset temperature can be compared.

[0061] In the embodiments of the present invention, the comparison result obtained by comparing the actual temperature of the coolant with the first preset temperature can be used to determine the duty cycle determination strategy.

[0062] Step 220: When the actual temperature is less than the first preset temperature, determine the duty cycle based on the first control strategy.

[0063] In one implementation, step 220 may specifically include:

[0064] When the actual temperature is less than the first preset temperature, compare the actual temperature of the coolant with the target temperature; if the actual temperature is greater than the target temperature, determine the duty cycle according to the difference between the actual temperature and the target temperature; if the actual temperature is less than or equal to the target temperature, determine the duty cycle to be 0.

[0065] Specifically, the first control strategy can be understood as the existing duty cycle determination strategy, that is, when the actual temperature is less than or equal to the target temperature, the duty cycle of the control signal is determined to be 0; when the actual temperature is greater than the target temperature, the duty cycle of the control signal is determined according to the difference between the actual temperature and the target temperature, and the greater the difference, the greater the duty cycle of the control signal.

[0066] In the embodiments of the present invention, when it is determined that the actual temperature of the coolant is less than the first preset temperature, the duty cycle of the control signal can be determined based on the first control strategy.

[0067] Step 230: When the actual temperature is greater than or equal to the first preset temperature, determine the duty cycle based on the second control strategy.

[0068] Since the larger the difference between the actual temperature and the target temperature, the larger the signal duty cycle of the control signal. If the signal duty cycle of the control signal continues to be determined according to the first control strategy, it may cause the signal duty cycle of the control signal to be too large, which may lead to the heating rod inside the electronic thermostat heating for too long, and the rubber ring will be damaged by heat. In order to prevent the signal duty cycle of the control signal from remaining at a high percentage for a long time, when the actual temperature is less than the first preset temperature, the signal duty cycle of the control signal can be determined according to the first control strategy. When the actual temperature is greater than or equal to the first preset temperature, the determination strategy of the signal duty cycle of the control signal is changed.

[0069] Therefore, when the actual temperature is greater than or equal to the first preset temperature, the determination strategy of the signal duty cycle can be re-determined, and the signal duty cycle of the control signal can be determined based on the second control strategy.

[0070] In one implementation, step 230 may specifically include:

[0071] When the actual temperature is greater than or equal to the first preset temperature, if the actual temperature is equal to the first preset temperature, the signal duty cycle is determined to be the intermediate duty cycle; otherwise, the actual temperature is compared with the second preset temperature; when the actual temperature is less than the second preset temperature, the signal duty cycle is determined according to the difference between the actual temperature and the first preset temperature; when the actual temperature is greater than or equal to the second preset temperature, the signal duty cycle is determined to be 0.

[0072] Specifically, when the actual temperature is equal to the first preset temperature, the signal duty cycle of the control signal is determined to be the preset duty cycle; when the actual temperature is greater than the first preset temperature and less than the second preset temperature, the signal duty cycle of the control signal is determined according to the difference between the actual temperature and the first preset temperature, and the larger the difference, the smaller the signal duty cycle of the control signal; when the actual temperature is greater than the second preset temperature, the signal duty cycle of the control signal is determined to be 0.

[0073] The preset duty cycle can be preset. For example, the preset duty cycle can be preset to 30%.

[0074] It should be noted that the first preset temperature is greater than the target temperature, and the second preset temperature is greater than the first preset temperature.

[0075] In the embodiment of the present invention, when it is determined that the actual temperature of the coolant is greater than or equal to the first preset temperature, the signal duty cycle of the control signal can be determined based on the second control strategy.

[0076] Step 240, determine the control signal according to the signal duty cycle, and control the operation of the electronic thermostat based on the control signal.

[0077] Among them, the electronic thermostat includes: a heating rod, paraffin, and a valve.

[0078] In one implementation, step 240 may specifically include:

[0079] Determine the pulse width modulation (PWM) signal corresponding to the signal duty cycle as the control signal; control the electronic thermostat to open or close the valve based on the control signal.

[0080] Optionally, when the signal duty cycle is 0, control the electronic thermostat to close the valve based on the control signal; when the signal duty cycle is not 0, determine the heating efficiency of the heating rod in the electronic thermostat based on the signal duty cycle of the control signal, and control the heating rod to generate heat based on the heating efficiency, melting the paraffin while increasing the volume of the paraffin, and opening the valve based on the paraffin.

[0081] Specifically, the pulse width modulation (PWM) signal corresponding to the signal duty cycle can be determined as the control signal, and then the operation of the electronic thermostat can be controlled based on the control signal. When the signal duty cycle of the control signal is 0, the valve of the electronic thermostat can be controlled to close based on the control signal. When the signal duty cycle of the control signal is not 0, the valve of the electronic thermostat can be controlled to open based on the control signal. Specifically, the heating efficiency of the heating rod can be determined according to the signal duty cycle of the control signal, and the heating efficiency of the heating rod is proportional to the signal duty cycle of the control signal. That is, the larger the signal duty cycle of the control signal, the higher the heating efficiency of the heating rod. Control the heating rod in the electronic thermostat to generate heat based on the heating efficiency, melting the paraffin while increasing the volume of the paraffin, and the increased volume of the paraffin generates a force to overcome the spring, thereby opening the valve of the electronic thermostat.

[0082] Therefore, this application avoids the signal duty cycle of the control signal being at a relatively high percentage for a long time, avoids the heating efficiency of the heating rod being at a relatively high value for a long time, and further avoids damage to the hardware of the electronic thermostat during the control process of the electronic thermostat.

[0083] In the embodiment of the present invention, after determining the signal duty cycle of the control signal according to the actual temperature of the coolant, the control signal can be determined according to the signal duty cycle, and the control signal can be used to control the opening or closing of the valve of the electronic thermostat.

[0084] The control method of the electronic thermostat provided by the embodiment of the present invention includes: comparing the actual temperature of the coolant in the engine with a first preset temperature; when the actual temperature is less than the first preset temperature, determining the signal duty ratio based on a first control strategy; when the actual temperature is greater than or equal to the first preset temperature, determining the signal duty ratio based on a second control strategy; determining a control signal according to the signal duty ratio, and controlling the operation of the electronic thermostat based on the control signal. In the above technical solution, the determination strategy of the signal duty ratio can be determined according to the comparison result obtained by comparing the actual temperature of the coolant with the first preset temperature. When the actual temperature is less than the first preset temperature, the signal duty ratio can be determined based on the first control strategy, that is, when the actual temperature is less than or equal to the target temperature, the signal duty ratio of the control signal is determined to be 0. When the actual temperature is greater than the target temperature, the signal duty ratio of the control signal is determined according to the difference between the actual temperature and the target temperature, and the greater the difference, the greater the signal duty ratio of the control signal. When the actual temperature is greater than or equal to the first preset temperature, the signal duty ratio is determined based on the second control strategy, that is, when the actual temperature is equal to the first preset temperature, the signal duty ratio of the control signal is determined to be a preset duty ratio. When the actual temperature is greater than the first preset temperature and less than the second preset temperature, the signal duty ratio of the control signal is determined according to the difference between the actual temperature and the first preset temperature, and the greater the difference, the smaller the signal duty ratio of the control signal. When the actual temperature is greater than the second preset temperature, the signal duty ratio of the control signal is determined to be 0. Furthermore, the control signal can be determined according to the signal duty ratio, and the opening or closing of the electronic thermostat valve can be controlled based on the control signal, realizing the intelligent control of the electronic thermostat.

[0085] In addition, when the signal duty ratio of the control signal is not 0, the heating efficiency of the heating rod can be determined according to the signal duty ratio of the control signal, and the heating rod in the electronic thermostat can be controlled to generate heat based on the heating efficiency, melting the paraffin and increasing the volume of the paraffin at the same time, and opening the electronic thermostat valve based on the paraffin. Moreover, the signal duty ratio of the control signal will not be too high, avoiding the overlong heating time of the heating rod inside the electronic thermostat, and thus the heat damage of the rubber ring. The intelligent control of the electronic thermostat is realized on the premise of reducing the hardware damage of the electronic thermostat.

[0086] Figure 3 It is a flowchart of the implementation of a control method for an electronic thermostat provided by an embodiment of the present invention, and one implementation manner is exemplarily given. As Figure 3 shown, it includes:

[0087] Step 310: Determine the actual temperature of the coolant in the engine, and determine the first preset temperature according to the existing determination strategy of the signal duty ratio of the control signal.

[0088] Step 320: Determine whether the actual temperature is less than the first preset temperature.

[0089] If the actual temperature is less than the first preset temperature, step 330 is executed; otherwise, step 340 is executed.

[0090] Step 330: Determine the signal duty cycle based on the first control strategy.

[0091] After step 330, step 350 is executed.

[0092] Step 340: Determine the signal duty cycle based on the second control strategy.

[0093] Step 350: Determine the PWM signal corresponding to the signal duty cycle as the control signal.

[0094] Step 360: Determine whether the signal duty cycle of the control signal is 0.

[0095] If the signal duty cycle of the control signal is 0, step 370 is executed; otherwise, step 380 is executed.

[0096] Step 370: Control the electronic thermostat to close the electronic thermostat valve based on the control signal.

[0097] Step 380: Determine the heating efficiency of the heating rod in the electronic thermostat based on the signal duty cycle of the control signal, and control the heating rod to generate heat based on the heating efficiency, melt the paraffin while increasing the volume of the paraffin, and open the electronic thermostat valve based on the force generated by the increase in the paraffin volume to overcome the spring.

[0098] The implementation manner of the control method of the electronic thermostat provided by the embodiment of the present invention has the corresponding beneficial effects of executing the foregoing control method of the electronic thermostat.

[0099] Figure 4 It is a schematic structural diagram of a control device of an electronic thermostat provided by an embodiment of the present invention. This device can be applied to situations where hardware damage of the electronic thermostat needs to be reduced. This device can be implemented by software and / or hardware and is generally integrated in an electronic device.

[0100] As Figure 4 shown, this device includes:

[0101] A comparison module 410, configured to compare the actual temperature of the coolant in the engine with the first preset temperature;

[0102] A first determination module 420, configured to determine the signal duty cycle based on the first control strategy when the actual temperature is less than the first preset temperature;

[0103] A second determination module 430, configured to determine the signal duty cycle based on the second control strategy when the actual temperature is greater than or equal to the first preset temperature;

[0104] An execution module 440 is configured to determine a control signal according to the signal duty ratio and control the operation of an electronic thermostat based on the control signal.

[0105] For the control device of the electronic thermostat provided in this embodiment, the actual temperature of the coolant in the engine is compared with a first preset temperature; when the actual temperature is less than the first preset temperature, the signal duty ratio is determined based on a first control strategy; when the actual temperature is greater than or equal to the first preset temperature, the signal duty ratio is determined based on a second control strategy; a control signal is determined according to the signal duty ratio, and the operation of the electronic thermostat is controlled based on the control signal. According to the above technical solution, the determination strategy of the signal duty ratio can be determined through the comparison result obtained by comparing the actual temperature of the coolant with the first preset temperature. When the actual temperature is less than the first preset temperature, the signal duty ratio can be determined based on the first control strategy, that is, when the actual temperature is less than or equal to the target temperature, the signal duty ratio of the control signal is determined to be 0. When the actual temperature is greater than the target temperature, the signal duty ratio of the control signal is determined according to the difference between the actual temperature and the target temperature, and the greater the difference, the greater the signal duty ratio of the control signal. When the actual temperature is greater than or equal to the first preset temperature, the signal duty ratio is determined based on the second control strategy, that is, when the actual temperature is equal to the first preset temperature, the signal duty ratio of the control signal is determined to be the preset duty ratio. When the actual temperature is greater than the first preset temperature and less than the second preset temperature, the signal duty ratio of the control signal is determined according to the difference between the actual temperature and the first preset temperature, and the greater the difference, the smaller the signal duty ratio of the control signal. When the actual temperature is greater than the second preset temperature, the signal duty ratio of the control signal is determined to be 0. Furthermore, the control signal can be determined according to the signal duty ratio, and the opening or closing of the electronic thermostat valve can be controlled based on the control signal to achieve intelligent control of the electronic thermostat.

[0106] Based on the above embodiment, the first determination module 420 is specifically configured to:

[0107] When the actual temperature is less than the preset temperature, compare the actual temperature of the coolant with the target temperature; if the actual temperature is greater than the target temperature, determine the signal duty ratio according to the difference between the actual temperature and the target temperature; if the actual temperature is less than or equal to the target temperature, determine the signal duty ratio to be 0.

[0108] Based on the above embodiment, the second determination module 430 is specifically configured to:

[0109] If the actual temperature is equal to the first preset temperature, determine that the signal duty cycle is the intermediate duty cycle; otherwise, compare the actual temperature with the second preset temperature; when the actual temperature is less than the second preset temperature, determine the signal duty cycle according to the difference between the actual temperature and the first preset temperature; when the actual temperature is greater than or equal to the second preset temperature, determine that the signal duty cycle is 0.

[0110] Based on the above embodiments, the electronic thermostat includes: a heating rod, paraffin wax, and a valve. Correspondingly, the execution module 440 is specifically configured to:

[0111] Determine the pulse width modulation (PWM) signal corresponding to the signal duty cycle as the control signal; when the signal duty cycle is 0, control the electronic thermostat to close the valve based on the control signal; when the signal duty cycle is not 0, determine the heat generation efficiency of the heating rod in the electronic thermostat based on the signal duty cycle of the control signal, and control the heating rod to generate heat based on the heat generation efficiency, melt the paraffin wax while increasing the volume of the paraffin wax, and open the valve based on the paraffin wax.

[0112] The control device of the electronic thermostat provided by the embodiments of the present invention can execute the control method of the electronic thermostat provided by any embodiment of the present invention, and has the corresponding functional modules and beneficial effects for executing the control method of the electronic thermostat.

[0113] It should be noted that in the embodiments of the control device of the above electronic thermostat, the various units and modules included are only divided according to functional logic, but are not limited to the above division, as long as the corresponding functions can be realized; in addition, the specific names of the functional units are only for the convenience of mutual distinction and do not limit the protection scope of the present invention.

[0114] Figure 5 It is a schematic structural diagram of an electronic device provided by an embodiment of the present invention. Figure 5 It shows a block diagram of an exemplary electronic device 5 suitable for implementing the embodiments of the present invention. Figure 5 The displayed electronic device 5 is only an example and should not bring any limitation to the functions and usage scope of the embodiments of the present invention.

[0115] As Figure 5 shown, the electronic device 5 is presented in the form of a general-purpose computing electronic device. The components of the electronic device 5 may include, but are not limited to: one or more processors or processing units 16, a system memory 28, and a bus 18 connecting different system components (including the system memory 28 and the processing unit 16).

[0116] Bus 18 represents one or more of several types of bus architectures, including a memory bus or memory controller, a peripheral bus, an Accelerated Graphics Port, a processor bus, or a local bus using any of the several bus architectures. By way of example, and not limitation, these architectures include Industry Standard Architecture (ISA) buses, Micro Channel Architecture (MAC) buses, Enhanced ISA buses, Video Electronics Standards Association (VESA) local buses, and Peripheral Component Interconnect (PCI) buses.

[0117] Electronic device 5 typically includes a variety of computer system readable media. These media can be any available media that can be accessed by electronic device 5, including both volatile and nonvolatile media, removable and non-removable media.

[0118] System memory 28 can include computer system readable media in the form of volatile memory, such as random access memory (RAM) 30 and / or cache memory 32. Electronic device 5 can further include other removable / non-removable, volatile / nonvolatile computer system storage media. By way of example only, storage system 34 can be used for reading from and writing to non-removable, nonvolatile magnetic media ( Figure 5 not shown and typically called a "hard disk drive"). Although Figure 5 not shown in the figures, a disk drive for reading from and writing to a removable, nonvolatile magnetic disk (e.g., a "floppy disk"), and an optical disk drive for reading from and writing to a removable, nonvolatile optical disk (e.g., a CD-ROM, a DVD-ROM, or other optical media) can be provided. In these instances, each drive can be connected to bus 18 by one or more data media interfaces. System memory 28 can include at least one program product having a set (e.g., at least one) of program modules that are configured to carry out the functions of embodiments of the present invention.

[0119] A program / utility 40 having a set (at least one) of program modules 42 can be stored, for example, in system memory 28, such program modules 42 including, but not limited to, an operating system, one or more application programs, other program modules, and program data, each of which examples or some combination thereof may include an implementation of a networking environment. The program modules 42 generally carry out the functions and / or methods of the embodiments described herein.

[0120] The electronic device 5 can also communicate with one or more external devices 14 (such as a keyboard, a pointing device, a display 24, etc.), and can also communicate with one or more devices that enable a user to interact with the electronic device 5, and / or communicate with any device that enables the electronic device 5 to communicate with one or more other computing devices (such as a network card, a modem, etc.). Such communication can be carried out through an input / output (I / O) interface 22. Moreover, the electronic device 5 can also communicate with one or more networks (such as a local area network (LAN), a wide area network (WAN), and / or a public network, such as the Internet) through a network adapter 20. As Figure 5 shown, the network adapter 20 communicates with other modules of the electronic device 5 through a bus 18. It should be understood that although Figure 5 not shown in the figure, other hardware and / or software modules can be used in combination with the electronic device 5, including but not limited to: microcode, device drivers, redundant processing units, external disk drive arrays, RAID systems, tape drives, and data backup storage systems, etc.

[0121] The processing unit 16 executes various functional applications and page displays by running programs stored in the system memory 28. For example, it implements the control method of the electronic thermostat provided by the present embodiment of the invention. The method includes:

[0122] Comparing the actual temperature of the coolant in the engine with a first preset temperature;

[0123] When the actual temperature is less than the first preset temperature, determining a signal duty cycle based on a first control strategy;

[0124] When the actual temperature is greater than or equal to the first preset temperature, determining the signal duty cycle based on a second control strategy;

[0125] Determining a control signal according to the signal duty cycle, and controlling the operation of the electronic thermostat based on the control signal.

[0126] Of course, those skilled in the art can understand that the processor can also implement the technical solutions of the control method of the electronic thermostat provided by any embodiment of the present invention.

[0127] The embodiment of the present invention provides a computer-readable storage medium, on which a computer program is stored. When the program is executed by a processor, it implements, for example, the control method of the electronic thermostat provided by the present embodiment of the invention. The method includes:

[0128] Comparing the actual temperature of the coolant in the engine with a first preset temperature;

[0129] When the actual temperature is less than the first preset temperature, determining a signal duty cycle based on a first control strategy;

[0130] When the actual temperature is greater than or equal to the first preset temperature, determine the signal duty cycle based on the second control strategy;

[0131] Determine a control signal according to the signal duty cycle, and control the operation of the electronic thermostat based on the control signal.

[0132] The computer storage medium of the embodiments of the present invention can adopt any combination of one or more computer-readable media. The computer-readable medium can be a computer-readable signal medium or a computer-readable storage medium. The computer-readable storage medium can be, for example, but not limited to: an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination of the above. More specific examples (non-exhaustive list) of the computer-readable storage medium include: an electrical connection with one or more wires, a portable computer disk, 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 disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the above. In this document, the computer-readable storage medium can be any tangible medium that contains or stores a program, and this program can be used by or in combination with an instruction execution system, apparatus, or device.

[0133] The computer-readable signal medium can include a data signal propagated in a baseband or as part of a carrier wave, in which the computer-readable program code is carried. Such a propagated data signal can take various forms, including but not limited to electromagnetic signals, optical signals, or any suitable combination of the above. The computer-readable signal medium can also be any computer-readable medium other than the computer-readable storage medium, and this computer-readable medium can send, propagate, or transmit a program for use by or in combination with an instruction execution system, apparatus, or device.

[0134] The program code contained on the computer-readable medium can be transmitted by any suitable medium, including but not limited to: wireless, wire, optical cable, RF, etc., or any suitable combination of the above.

[0135] Computer program code for performing the operations of the present invention may be written in one or more programming languages or combinations thereof. The programming languages include object-oriented programming languages such as Java, Smalltalk, C++, and also include conventional procedural programming languages such as the "C" language or similar programming languages. The program code may be executed entirely on the user's computer, partially on the user's computer, executed as a stand-alone software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In the case of a remote computer, the remote computer may be connected to the user's computer through any type of network, including a local area network (LAN) or a wide area network (WAN), or may be connected to an external computer (e.g., connected through the Internet using an Internet service provider).

[0136] Those of ordinary skill in the art should understand that the above-mentioned modules or steps of the present invention can be implemented with a general-purpose computing device. They can be concentrated on a single computing device or distributed over a network composed of multiple computing devices. Optionally, they can be implemented with program code executable by a computer device, so that they can be stored in a storage device and executed by the computing device, or they can be made into individual integrated circuit modules respectively, or multiple modules or steps among them can be made into a single integrated circuit module to implement. Thus, the present invention is not limited to any specific combination of hardware and software.

[0137] In addition, the acquisition, storage, use, processing, etc. of data in the technical solution of the present invention all comply with the relevant provisions of national laws and regulations.

[0138] Note that the above is only the preferred embodiment of the present invention and the technical principles applied. Those skilled in the art will understand that the present invention is not limited to the specific embodiments here. Various obvious changes, re-adjustments, and substitutions can be made by those skilled in the art without departing from the protection scope of the present invention. Therefore, although the present invention has been described in more detail through the above embodiments, the present invention is not limited to the above embodiments. Without departing from the concept of the present invention, more other equivalent embodiments can be included, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A control method for an electronic thermostat, characterized in that, Including: Comparing the actual temperature of the coolant in the engine with a first preset temperature; When the actual temperature is less than the first preset temperature, determining the signal duty ratio based on a first control strategy; When the actual temperature is greater than or equal to the first preset temperature, determining the signal duty ratio based on a second control strategy; Determining a control signal according to the signal duty ratio, and controlling the operation of the electronic thermostat based on the control signal; The determining the signal duty ratio based on the second control strategy includes: If the actual temperature is equal to the first preset temperature, determining the signal duty ratio as an intermediate duty ratio; Otherwise; comparing the actual temperature with a second preset temperature; When the actual temperature is less than the second preset temperature, determining the signal duty ratio according to the difference between the actual temperature and the first preset temperature, and the greater the difference, the smaller the signal duty ratio of the control signal; When the actual temperature is greater than or equal to the second preset temperature, determining the signal duty ratio as 0; The determining the signal duty ratio based on the first control strategy includes: Comparing the actual temperature of the coolant with a target temperature; If the actual temperature is greater than the target temperature, determining the signal duty ratio according to the difference between the actual temperature and the target temperature, and the greater the difference, the greater the signal duty ratio of the control signal; If the actual temperature is less than or equal to the target temperature, determining the signal duty ratio as 0.

2. The control method of the electronic thermostat according to claim 1, characterized in that, Determining a control signal according to the signal duty ratio includes: Determining the pulse width modulation (PWM) signal corresponding to the signal duty ratio as the control signal.

3. The control method of the electronic thermostat according to claim 1, characterized in that, The electronic thermostat includes: a heating rod, paraffin, and a valve.

4. The control method of the electronic thermostat according to claim 3, characterized in that, When the signal duty ratio is 0, controlling the operation of the electronic thermostat based on the control signal includes: Controlling the electronic thermostat to close the valve based on the control signal.

5. The control method of the electronic thermostat according to claim 3, characterized in that, When the signal duty ratio is not 0, controlling the operation of the electronic thermostat based on the control signal includes: Determining the heating efficiency of the heating rod in the electronic thermostat according to the signal duty ratio of the control signal, and controlling the heating rod to generate heat based on the heating efficiency, melting the paraffin and increasing the volume of the paraffin at the same time, and opening the valve based on the paraffin.

6. A control device for an electronic thermostat, characterized in that, Including: A comparison module for comparing the actual temperature of the coolant in the engine with a first preset temperature; A first determination module for determining the signal duty ratio based on a first control strategy when the actual temperature is less than the first preset temperature; A second determination module for determining the signal duty ratio based on a second control strategy when the actual temperature is greater than or equal to the first preset temperature; An execution module for determining a control signal according to the signal duty ratio and controlling the operation of the electronic thermostat based on the control signal; The second determination module is specifically used for: If the actual temperature is equal to the first preset temperature, determining the signal duty ratio as an intermediate duty ratio; Otherwise; comparing the actual temperature with a second preset temperature; When the actual temperature is less than the second preset temperature, determining the signal duty ratio according to the difference between the actual temperature and the first preset temperature, and the greater the difference, the smaller the signal duty ratio of the control signal; When the actual temperature is greater than or equal to the second preset temperature, determine that the signal duty cycle is 0; The first determination module is specifically configured to: Compare the actual temperature of the coolant with the target temperature; If the actual temperature is greater than the target temperature, determine the signal duty cycle according to the difference between the actual temperature and the target temperature, and the greater the difference, the greater the signal duty cycle of the control signal; If the actual temperature is less than or equal to the target temperature, determine that the signal duty cycle is 0.

7. An electronic device, characterized in that, It includes: At least one processor; And a memory communicatively connected to the at least one processor; Wherein, the memory stores a computer program executable by the at least one processor, and the computer program is executed by the at least one processor so that the at least one processor can execute the control method of the electronic thermostat according to any one of claims 1-5.

8. A storage medium containing computer-executable instructions, the computer-executable instructions being used to execute the control method of the electronic thermostat according to any one of claims 1-5 when executed by a computer processor.

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