CN116517677A - Control method and device of electronic thermostat, electronic equipment and vehicle - Google Patents
Control method and device of electronic thermostat, electronic equipment and vehicle Download PDFInfo
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- CN116517677A CN116517677A CN202310721436.9A CN202310721436A CN116517677A CN 116517677 A CN116517677 A CN 116517677A CN 202310721436 A CN202310721436 A CN 202310721436A CN 116517677 A CN116517677 A CN 116517677A
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- 238000000034 method Methods 0.000 title claims abstract description 53
- 239000007788 liquid Substances 0.000 claims abstract description 257
- 230000008859 change Effects 0.000 claims abstract description 85
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- 238000004590 computer program Methods 0.000 claims description 12
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- 230000004048 modification Effects 0.000 claims description 4
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 20
- 230000008569 process Effects 0.000 description 7
- 230000001276 controlling effect Effects 0.000 description 6
- 230000007613 environmental effect Effects 0.000 description 6
- 230000007423 decrease Effects 0.000 description 4
- 238000005265 energy consumption Methods 0.000 description 4
- 238000005070 sampling Methods 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 3
- 239000000498 cooling water Substances 0.000 description 3
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 230000017525 heat dissipation Effects 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 230000033228 biological regulation Effects 0.000 description 2
- 238000004364 calculation method Methods 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 239000000110 cooling liquid Substances 0.000 description 2
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- 238000013021 overheating Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000004781 supercooling Methods 0.000 description 1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P7/00—Controlling of coolant flow
- F01P7/14—Controlling of coolant flow the coolant being liquid
- F01P7/16—Controlling of coolant flow the coolant being liquid by thermostatic control
- F01P7/167—Controlling of coolant flow the coolant being liquid by thermostatic control by adjusting the pre-set temperature according to engine parameters, e.g. engine load, engine speed
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Abstract
The application provides a control method and device of an electronic thermostat, electronic equipment and a vehicle, wherein the method is applied to an engine control module and comprises the following steps: acquiring the environment temperature, the vehicle speed, the torque change rate, the engine output torque, the engine liquid medium temperature, the target liquid medium temperature and the power supply voltage of a power battery; determining a first duty cycle of the electronic thermostat based on the parameters; if the temperature of the liquid medium of the engine is greater than or equal to a preset temperature threshold value, determining a second duty ratio; determining a third duty cycle based on the supply voltage and the engine liquid medium temperature; determining a target duty cycle based on the first duty cycle, the second duty cycle, and the third duty cycle; based on the target duty ratio, the electronic thermostat is controlled to adjust the temperature of the liquid medium of the engine to the target liquid medium temperature, so that the response speed of the electronic thermostat is improved, the fluctuation of the temperature of the liquid medium of the engine is reduced, and the control precision of the electronic thermostat is improved.
Description
Technical Field
The application belongs to the technical field of vehicle control, and particularly relates to a notification method and device of an electronic thermostat, electronic equipment and a vehicle.
Background
The current control method of the electronic thermostat is to perform closed-loop regulation and control on the water temperature, namely, the target water temperature of an engine is set firstly, the basic duty ratio is determined according to the engine speed and the engine load, and then the electronic thermostat is controlled by the actual water temperature, the difference value between the actual water temperature and the target water temperature according to the proportion (P), the integral (I) and the differential (D) of the difference value. The control method has longer calibration time, and because the electronic thermostat has the physical characteristics of wax packets, the response speed following performance of the duty ratio and the actual water temperature determined by PID control is not high, and the rapid PID control can cause the water temperature to have fluctuation change.
The prior art has the problem that the response speed following performance of the duty ratio of the electronic thermostat determined by proportional-integral-derivative control is not high, so that the water temperature of the engine has fluctuation and change.
Disclosure of Invention
The embodiment of the application provides a control method and device of an electronic thermostat, electronic equipment and a vehicle, and can solve the problem that the response speed of the duty ratio of the electronic thermostat determined by proportional-integral-derivative control is low, so that the water temperature of an engine has fluctuation change.
In a first aspect, an embodiment of the present application provides a control method of an electronic thermostat, applied to an engine control module, including:
Acquiring the environment temperature, the vehicle speed, the torque change rate, the engine output torque, the engine liquid medium temperature, the target liquid medium temperature and the power supply voltage of a power battery;
determining a first duty cycle of an electronic thermostat based on the ambient temperature, the vehicle speed, the torque rate of change, the engine output torque, the engine liquid medium temperature, and the target liquid medium temperature;
if the temperature of the liquid medium of the engine is greater than or equal to a preset temperature threshold, determining a second duty ratio of the electronic thermostat;
determining a third duty cycle of the electronic thermostat based on the supply voltage and the engine liquid medium temperature;
determining a target duty cycle of the electronic thermostat based on the first duty cycle, the second duty cycle, and the third duty cycle;
and controlling the electronic thermostat to adjust the engine liquid medium temperature to the target liquid medium temperature based on the target duty cycle.
In one embodiment, the target liquid medium temperature comprises a first target liquid medium temperature, a second target liquid medium temperature, a third target liquid medium temperature, and a fourth target liquid medium temperature, the engine speeds comprise a first engine speed and a second engine speed, the engine loads comprise a first engine load and a second engine load;
Obtaining a target liquid medium temperature, comprising:
acquiring a first engine speed and a first engine load;
determining a first target liquid medium temperature based on the first engine speed and the first engine load;
determining a second target liquid medium temperature based on the ambient temperature and the first target liquid medium temperature;
acquiring a second engine speed and a second engine load;
determining a third target liquid medium temperature based on the second engine speed and the second engine load;
determining a fourth target liquid medium temperature based on the ambient temperature and the third target liquid medium temperature;
and if the fourth target liquid medium temperature is greater than or less than the second target liquid medium temperature, performing filtering processing based on the second target liquid medium temperature and the fourth target liquid medium temperature, and determining the filtered target liquid medium temperature.
In one embodiment, the determining the first duty cycle of the electronic thermostat based on the ambient temperature, the vehicle speed, the torque rate of change, the engine output torque, the engine liquid medium temperature, and the target liquid medium temperature includes:
Determining a liquid medium temperature difference of the engine liquid medium temperature and the target liquid medium temperature based on the engine liquid medium temperature and the target liquid medium temperature;
determining a first temperature differential duty cycle of the electronic thermostat based on the engine liquid medium temperature and the liquid medium temperature difference, the first temperature differential duty cycle characterizing a duty cycle corresponding to the engine liquid medium temperature and the liquid medium temperature difference;
determining a first modified duty cycle of the electronic thermostat based on the ambient temperature, the vehicle speed, and the first temperature differential duty cycle, the first modified duty cycle characterizing a modified duty cycle of the first temperature differential duty cycle as a function of the ambient temperature, the vehicle speed;
determining a first torque duty cycle of the electronic thermostat based on the torque rate of change, the engine output torque, and a first correction duty cycle, the first torque duty cycle being indicative of a torque duty cycle at which the first correction duty cycle is corrected in accordance with the torque rate of change, the engine output torque;
a first duty cycle is determined based on the first differential temperature duty cycle, the first modified duty cycle, and the first torque duty cycle.
In one embodiment, the determining a first modified duty cycle of the electronic thermostat based on the ambient temperature, the vehicle speed, and the first temperature differential duty cycle includes:
determining a first correction factor based on the ambient temperature and the vehicle speed, the first correction factor characterizing a correction factor corresponding to the ambient temperature, the vehicle speed;
a first modified duty cycle of the electronic thermostat is determined based on the first temperature difference duty cycle and the first modification coefficient.
In one embodiment, the determining a first torque duty cycle of the electronic thermostat based on the torque rate of change, the engine output torque, and a first modified duty cycle comprises:
acquiring the output torque of an engine and the change duration of a preset torque;
determining the torque change rate based on the engine output torque and the preset torque change duration;
determining a second correction factor based on the torque change rate and the engine output torque;
a first torque duty cycle of the electronic thermostat is determined based on the second correction coefficient and the first correction duty cycle.
In one embodiment, the determining the target duty cycle of the electronic thermostat based on the first duty cycle, the second duty cycle, and the third duty cycle includes:
Performing a large value operation based on the first duty cycle and the second duty cycle, and determining a large value duty cycle of the electronic thermostat;
and performing small value operation based on the third duty ratio and the large value duty ratio, and determining the target duty ratio of the electronic thermostat.
In one embodiment, the preset temperature threshold is greater than or equal to 108 ℃.
In a second aspect, an embodiment of the present application provides a control device for an electronic thermostat, including:
the acquisition module is used for acquiring the environment temperature, the vehicle speed, the torque change rate, the engine liquid medium temperature, the target liquid medium temperature and the power supply voltage;
a first determination module for determining a first duty cycle of an electronic thermostat based on the ambient temperature, the vehicle speed, the torque rate of change, the engine liquid medium temperature, and the target liquid medium temperature;
the second determining module is used for determining a second duty ratio of the electronic thermostat if the temperature of the liquid medium of the engine is greater than or equal to a preset temperature;
a third determination module for determining a third duty cycle of the electronic thermostat based on the supply voltage and the engine liquid medium temperature;
A fourth determining module configured to determine a target duty cycle of the electronic thermostat based on the first duty cycle, the second duty cycle, and the third duty cycle;
and the control module is used for controlling the electronic thermostat to adjust the temperature of the engine liquid medium to the target liquid medium temperature based on the target duty ratio.
In a third aspect, an embodiment of the present application provides an electronic device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, the processor implementing the method according to any one of the first aspect when the computer program is executed.
In a fourth aspect, embodiments of the present application provide a vehicle, which includes a control device of the electronic fan according to the second aspect, where the control device performs the method according to any one of the first aspect.
It will be appreciated that the advantages of the second to fourth aspects may be found in the relevant description of the first aspect and are not repeated here.
Compared with the prior art, the embodiment of the application has the beneficial effects that:
the method is applied to an engine control module, and is used for acquiring the ambient temperature, the vehicle speed, the torque change rate, the engine output torque, the engine liquid medium temperature, the target liquid medium temperature and the power supply voltage of a power battery; determining a first duty cycle of the electronic thermostat based on the ambient temperature, the vehicle speed, the torque rate of change, the engine output torque, the engine liquid medium temperature, and the target liquid medium temperature; if the temperature of the liquid medium of the engine is greater than or equal to a preset temperature threshold, determining a second duty ratio of the electronic thermostat; determining a third duty cycle of the electronic thermostat based on the supply voltage and the engine liquid medium temperature; determining a target duty cycle of the electronic thermostat based on the first duty cycle, the second duty cycle, and the third duty cycle; compared with the prior art adopting a proportional-integral-derivative control method, the electronic thermostat is controlled to adjust the temperature of the engine liquid medium to the target liquid medium temperature based on the target duty ratio, because the corrected first duty ratio is directly obtained according to each parameter, the second duty ratio of thermal protection is obtained, and the third duty ratio related to the power supply voltage of the power battery and the temperature of the engine liquid medium is obtained, the electronic thermostat is controlled to adjust the temperature of the engine liquid medium by adopting the target duty ratio determined in the three duty ratios, and a proportional-integral-derivative control method is not required, so that the calibration time is reduced, the response speed of the electronic thermostat is improved, the fluctuation of the temperature of the engine liquid medium is reduced, the control precision of the electronic thermostat is improved, and the thermal management efficiency of a vehicle is improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following description will briefly introduce the drawings that are needed in the embodiments or the description of the prior art, it is obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic flow chart of a control method of an electronic thermostat according to an embodiment of the present disclosure;
FIG. 2 is a schematic flow chart of a process for obtaining a target liquid medium temperature according to another embodiment of the present application;
FIG. 3 is a flow chart of determining a first duty cycle of an electronic thermostat based on an ambient temperature, a vehicle speed, a torque rate of change, an engine output torque, an engine liquid medium temperature, and a target liquid medium temperature, provided in another embodiment of the present application;
FIG. 4 is a flow chart of determining a first modified duty cycle of an electronic thermostat based on an ambient temperature, a vehicle speed, and a first temperature differential duty cycle provided in another embodiment of the present application;
FIG. 5 is a flow chart illustrating a method for determining a first torque duty cycle of an electronic thermostat based on a torque rate of change, an engine output torque, and a first modified duty cycle provided in another embodiment of the present application;
FIG. 6 is a schematic flow chart of determining a target duty cycle of an electronic thermostat based on a first duty cycle, a second duty cycle, and a third duty cycle provided in another embodiment of the present application;
fig. 7 is a schematic structural diagram of a control device of an electronic thermostat according to an embodiment of the present application.
Detailed Description
In the following description, for purposes of explanation and not limitation, specific details are set forth, such as particular system configurations, techniques, etc. in order to provide a thorough understanding of the embodiments of the present application. It will be apparent, however, to one skilled in the art that the present application may be practiced in other embodiments that depart from these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present application with unnecessary detail.
It should be understood that the terms "comprises" and/or "comprising," when used in this specification and the appended claims, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.
It should also be understood that the term "and/or" as used in this specification and the appended claims refers to any and all possible combinations of one or more of the associated listed items, and includes such combinations.
In addition, in the description of the present application and the appended claims, the terms "first," "second," "third," and the like are used merely to distinguish between descriptions and are not to be construed as indicating or implying relative importance.
Reference in the specification to "one embodiment" or "some embodiments" or the like means that a particular feature, structure, or characteristic described in connection with the embodiment is included in one or more embodiments of the application. Thus, appearances of the phrases "in one embodiment," "in some embodiments," "in other embodiments," and the like in the specification are not necessarily all referring to the same embodiment, but mean "one or more but not all embodiments" unless expressly specified otherwise. The terms "comprising," "including," "having," and variations thereof mean "including but not limited to," unless expressly specified otherwise.
The vehicle cooling system is used for ensuring the dynamic property, economical efficiency and service life of parts of the vehicle in various stages of starting, warming up, running and stopping the vehicle. The electronic thermostat is a valve for controlling the flow path of the cooling water, automatically adjusts the water quantity entering the radiator according to the temperature of the cooling water of the engine, changes the circulation range of the water, adjusts the heat dissipation capacity of the cooling water, and ensures that the engine works in a proper temperature range.
The thermostat is a key part for regulating the size circulation of the cooling liquid, and the function in a cooling system is very key. The traditional wax-type thermostat has the defects of low response speed, fixed starting temperature and the like, can not accurately control the temperature of cooling liquid, and is easy to cause the problems of supercooling, overheating or overlarge power consumption of an engine and the like; the ball valve type electronic thermostat can realize accurate control of different loops of the engine by controlling the opening of the ball valve through the motor, and can reduce the loss of engine power, but the cost is relatively high.
The electronic thermostat of this application embodiment has increased the electrical heating function for wax type thermostat, opens the thermostat in advance or closes electrical heating through electrical heating realization, cooperates the use of electronic water pump, electronic fan, makes actual temperature tend to target temperature to reach relatively better heat dissipation and energy consumption effect, moreover than ball valve type electronic thermostat with low costs.
The current control method of the electronic thermostat is to perform closed-loop regulation and control on water temperature, namely, firstly, set a target water temperature of an engine, determine a basic duty ratio according to the engine speed and the engine load, then determine a final duty ratio according to the difference value of the actual water temperature and the target water temperature by the proportion (P), the integral (I) and the derivative (D) of the difference value, and perform control on the electronic thermostat through the final duty ratio. The control method has longer calibration time, and because the electronic thermostat has the physical characteristics of wax packets, the response speed following performance of the duty ratio and the actual water temperature determined by PID control is not high, and the rapid PID control can cause the water temperature to have fluctuation change.
As shown in table 1, the duty ratio of the electronic thermostat is determined by the hub test based on the engine speed, the engine load, and the basic duty ratio of the pid control.
TABLE 1 Engine speed, engine load and corresponding base duty cycle
The prior art has the problem that the response speed following performance of the duty ratio of the electronic thermostat determined by proportional-integral-derivative control is not high, so that the water temperature of the engine has fluctuation and change.
The control method of the electronic thermostat is applied to an engine control module, and is used for obtaining the environment temperature, the vehicle speed, the torque change rate, the engine output torque, the engine liquid medium temperature, the target liquid medium temperature and the power supply voltage of a power battery; determining a first duty cycle of the electronic thermostat based on the ambient temperature, the vehicle speed, the torque rate of change, the engine output torque, the engine liquid medium temperature, and the target liquid medium temperature; if the temperature of the liquid medium of the engine is greater than or equal to a preset temperature threshold, determining a second duty ratio of the electronic thermostat; determining a third duty cycle of the electronic thermostat based on the supply voltage and the engine liquid medium temperature; determining a target duty cycle of the electronic thermostat based on the first duty cycle, the second duty cycle, and the third duty cycle; compared with the prior art adopting a proportional-integral-derivative control method, the electronic thermostat is controlled to adjust the temperature of the engine liquid medium to the target liquid medium temperature based on the target duty ratio, because the corrected first duty ratio is directly obtained according to each parameter, the second duty ratio of thermal protection is obtained, and the third duty ratio related to the power supply voltage of the power battery and the temperature of the engine liquid medium is obtained, the electronic thermostat is controlled to adjust the temperature of the engine liquid medium by adopting the target duty ratio determined in the three duty ratios, and a proportional-integral-derivative control method is not required, so that the calibration time is reduced, the response speed of the electronic thermostat is improved, the fluctuation of the temperature of the engine liquid medium is reduced, the control precision of the electronic thermostat is improved, and the thermal management efficiency of a vehicle is improved.
The technical scheme of the present application is described below by specific examples.
In a first aspect, as shown in fig. 1, the present embodiment provides a control method of an electronic thermostat, applied to an engine control module, including:
s100, acquiring the environment temperature, the vehicle speed, the torque change rate, the engine output torque, the engine liquid medium temperature, the target liquid medium temperature and the power supply voltage of the power battery.
In one embodiment, ambient temperature, vehicle speed, torque rate of change, engine output torque, engine liquid medium temperature, target liquid medium temperature, and power supply voltage of the power cell are obtained to facilitate correction and determination of the duty cycle of the electronic thermostat. Wherein the engine liquid medium comprises water. In this embodiment, the liquid medium of the engine and the corresponding electronic pump are not specifically limited, and are selected according to the requirements of different vehicle types.
In one embodiment, the target liquid medium temperature comprises a first target liquid medium temperature, a second target liquid medium temperature, a third target liquid medium temperature, and a fourth target liquid medium temperature, the engine speed comprises a first engine speed and a second engine speed, and the engine load comprises a first engine load and a second engine load.
In one embodiment, as shown in FIG. 2, obtaining a target liquid medium temperature includes:
s110, acquiring a first rotating speed and a first engine load of an engine.
S120, determining a first target liquid medium temperature based on the first engine speed and the first engine load.
In one embodiment, as shown in Table 2, as the engine speed increases from 650rpm to 6000rpm, the target liquid medium temperature decreases as the engine speed increases (except that the engine load is 15% of 0 steps) while the engine load is unchanged; when the engine load increases from 0 to 180% and the engine speed is constant, the target liquid medium temperature decreases as the engine load increases.
In one embodiment, as shown in table 2, a first target liquid medium temperature is determined based on a first engine speed and a first engine load; for example, the first engine load is 45%, the first engine speed is 1000rpm, and the corresponding first target liquid medium temperature is 95 ℃; alternatively, the first engine speed is 3000rpm, the first engine load is 145%, and the corresponding first target liquid medium temperature is 87 ℃.
TABLE 2 Engine speed, engine load and corresponding target liquid Medium temperature
S130, determining a second target liquid medium temperature based on the ambient temperature and the first target liquid medium temperature.
In one embodiment, the second target liquid medium temperature is determined based on the ambient temperature and the first target liquid medium temperature, and as the target liquid medium temperature is corrected according to the ambient temperature, the control precision of the electronic thermostat is improved, the mismatching between the target liquid medium temperature and the environment is avoided, and the energy consumption is reduced;
in one embodiment, as shown in table 3, an environmental correction factor for the target liquid medium is determined based on the environmental temperature, and a second target liquid medium temperature is determined based on a product of the environmental correction factor and the first target liquid medium temperature; for example, when the ambient temperature is-10, the corresponding ambient correction factor is 0.97, and when the first target liquid medium temperature is 90 ℃, the second target liquid medium temperature is 87.3 ℃.
TABLE 3 environmental temperature and environmental correction coefficient corresponding to the environmental temperature
S140, acquiring a second engine speed and a second engine load.
S150, determining a third target liquid medium temperature based on the second engine speed and the second engine load.
In one embodiment, as shown in Table 2, the second engine load is 45%, the second engine speed is 5500rpm, and the corresponding third target liquid medium temperature is 85 ℃, which is lower than the first target liquid medium temperature; alternatively, the second engine load is 25% at a second engine speed of 3000rpm, and the corresponding third target liquid medium temperature is 95 ℃ and higher than the first target liquid medium temperature.
S160 determining a fourth target liquid medium temperature based on the ambient temperature and the third target liquid medium temperature.
In one embodiment, a corresponding ambient correction factor is determined based on the ambient temperature, and a fourth target liquid medium temperature is determined based on the product of the ambient factor and the third target liquid medium temperature.
S170, if the fourth target liquid medium temperature is greater than or less than the second target liquid medium temperature, filtering processing is performed based on the second target liquid medium temperature and the fourth target liquid medium temperature, and the filtered target liquid medium temperature is determined.
In one embodiment, when the vehicle changes driving conditions (such as acceleration or deceleration of the vehicle), the engine speed and the engine load will change, and the target temperature will also change according to the control table in table 2, so as to avoid that the target liquid medium temperature fluctuates too much and too fast, and when the fourth target liquid medium temperature is greater than or less than the second target liquid medium temperature, filtering is performed based on the second target liquid medium temperature and the fourth target liquid medium temperature, and the filtered target liquid medium temperature is determined. For example, after the second target liquid medium temperature is 100 ℃ and the running condition is changed, the fourth target liquid medium temperature is 105 ℃ or 95 ℃, in the preset filtering time, the liquid medium temperature sensor of the electronic thermostat continuously samples at intervals of a preset duration, smooth filtering processing is performed on the sampling value in the preset filtering time, and then the filtered target liquid medium temperature is output.
In one embodiment, smoothing filtering is performed on sampling values within a preset filtering time to determine a target liquid medium temperature, including: and carrying out arithmetic average calculation on all sampling values or carrying out data processing on median values obtained by sampling values of a preset number at each interval, and determining the average value or the last median value output in the preset filtering time as the target liquid medium temperature.
In one embodiment, the preset duration is any value from 10ms to 20ms, and the preset filtering time includes a first preset filtering time and a second preset filtering time, where the first preset filtering time is a filtering time corresponding to a case that the fourth target liquid medium temperature is greater than the second target liquid medium temperature, and the second preset filtering time is a filtering time corresponding to a case that the fourth target liquid medium temperature is less than the second target liquid medium temperature. For example, the value range of the first preset filtering time is any one value of 0 s-10 s, the value range of the second preset filtering time is any one value of 0 s-20 s, and the corresponding preset filtering time is set for different running conditions, so that the fluctuation amplitude and the fluctuation speed of the temperature of the target liquid medium are reduced, the control precision of the temperature of the target liquid medium is improved, and the control precision of the electronic thermostat is also improved.
It should be noted that specific values of the preset duration and the preset filtering time are not limited, and are set according to the requirements of the vehicle.
S200, determining a first duty cycle of the electronic thermostat based on the ambient temperature, the vehicle speed, the torque change rate, the engine output torque, the engine liquid medium temperature, and the target liquid medium temperature.
In one embodiment, the first duty cycle of the electronic thermostat is determined based on the ambient temperature, the vehicle speed, the torque change rate, the engine output torque, the engine liquid medium temperature, and the target liquid medium temperature, so that the duty cycle is modified according to various parameters to improve the accuracy of controlling the electronic thermostat and reduce energy consumption.
In one embodiment, as shown in fig. 3, determining a first duty cycle of the electronic thermostat based on an ambient temperature, a vehicle speed, a torque rate of change, an engine output torque, an engine liquid medium temperature, and a target liquid medium temperature, includes:
s210, determining a liquid medium temperature difference between the engine liquid medium temperature and the target liquid medium temperature based on the engine liquid medium temperature and the target liquid medium temperature.
In one embodiment, the liquid medium temperature difference between the engine liquid medium temperature and the target liquid medium temperature is determined based on the engine liquid medium temperature and the target liquid medium temperature, so that the temperature difference duty ratio of the electronic thermostat is determined according to the liquid medium temperature difference, and the electronic thermostat is better controlled.
S220, determining a first temperature difference duty cycle of the electronic thermostat based on the engine liquid medium temperature and the liquid medium temperature difference, wherein the first temperature difference duty cycle represents a duty cycle corresponding to the engine liquid medium temperature and the liquid medium temperature difference.
In one embodiment, as shown in table 4, a first temperature differential duty cycle of an electronic thermostat is determined based on an engine liquid medium temperature and a liquid medium temperature difference; when the liquid medium temperature difference is unchanged, the first temperature difference duty ratio gradually rises as the temperature of the liquid medium of the engine rises from 84 ℃ to 108 ℃; when the temperature of the liquid medium of the engine is unchanged, the first temperature difference duty ratio is gradually increased along with the increase of the temperature difference value of the liquid medium from-10 ℃ to 20 ℃; for example, when the difference in liquid medium temperature is 3 ℃, the first temperature difference duty cycle corresponding to the engine liquid medium temperature of 88 ℃ is 10%, and the first temperature difference duty cycle corresponding to the engine liquid medium temperature of 102 ℃ is 50%; when the temperature of the liquid medium of the engine is 98 ℃, the first temperature difference duty ratio corresponding to the temperature difference of the liquid medium is-7 ℃ and is 5%, and the first temperature difference duty ratio corresponding to the temperature difference of the liquid medium is 6 ℃ and is 30%.
TABLE 4 Engine liquid Medium temperature, liquid Medium temperature differential and corresponding first temperature differential Duty cycle
S230, determining a first correction duty cycle of the electronic thermostat based on the ambient temperature, the vehicle speed and the first temperature difference duty cycle, wherein the first correction duty cycle represents the correction duty cycle of the first temperature difference duty cycle according to the ambient temperature and the vehicle speed.
In one embodiment, the first correction duty cycle of the electronic thermostat is determined based on the ambient temperature, the vehicle speed and the first temperature difference duty cycle, which is beneficial to the electronic thermostat to correct the first temperature difference duty cycle according to the ambient temperature and the vehicle speed, and improves the control precision of the electronic thermostat.
In one embodiment, as shown in FIG. 4, determining a first modified duty cycle of the electronic thermostat based on the ambient temperature, the vehicle speed, and the first temperature differential duty cycle includes:
s231, determining a first correction coefficient based on the ambient temperature and the vehicle speed, wherein the first correction coefficient represents a correction coefficient corresponding to the ambient temperature and the vehicle speed;
s232, determining a first correction duty cycle of the electronic thermostat based on the first temperature difference duty cycle and the first correction coefficient.
In one embodiment, as shown in Table 5, a first correction factor is determined based on ambient temperature and vehicle speed; when the vehicle speed is unchanged, the first correction coefficient is gradually increased along with the rise of the ambient temperature from-40 ℃ to 50 ℃; when the ambient temperature is unchanged, the first correction coefficient gradually decreases as the vehicle speed increases from 0 to 200 km/h; for example, when the vehicle speed is 30km/h, the first correction coefficient corresponding to the ambient temperature of-40 ℃ is 0.9, and the first correction coefficient corresponding to the ambient temperature of 40 ℃ is 1.2; when the ambient temperature is-10 ℃, the first correction coefficient corresponding to the vehicle speed of 30km/h is 0.97, and the first correction coefficient corresponding to the vehicle speed of 120km/h is 0.9.
In one embodiment, the first modified duty cycle of the electronic thermostat is determined based on a product of the first temperature difference duty cycle and the first modification coefficient, thereby improving control accuracy of the electronic thermostat.
TABLE 5 ambient temperature, vehicle speed and corresponding first correction factors
S240, determining a first torque duty cycle of the electronic thermostat based on the torque change rate, the engine output torque and the first correction duty cycle, wherein the first torque duty cycle represents a torque duty cycle for correcting the first correction duty cycle according to the torque change rate and the engine output torque.
In one embodiment, the first torque duty ratio of the electronic thermostat is determined based on the torque change rate, the engine output torque and the first correction duty ratio, so that the first correction duty ratio is convenient to carry out second correction according to the output torque and the torque change rate of the engine, the change of the engine heat can be responded in time, and the control precision of the electronic thermostat is further improved.
In one embodiment, as shown in FIG. 5, determining a first torque duty cycle of the electronic thermostat based on the torque rate of change, the engine output torque, and the first modified duty cycle includes:
s241, obtaining the output torque of the engine and the preset torque change duration.
In one embodiment, engine output torque and a preset torque change duration are obtained, facilitating the obtaining of a torque change rate.
S242, a torque change rate is determined based on the engine output torque and a preset torque change period.
In one embodiment, the torque change rate is determined by a torque change rate calculation based on the engine output torque and a preset torque change period. The torque change rate is calculated as follows:
f=Δt/Δt, where F is a torque change rate, Δt is a first preset torque change duration, Δt is a change value of the engine output torque within a second preset torque change duration, and the first preset torque change duration is equal to the second preset torque change duration, or the first preset torque change duration is unequal to the second preset torque change duration.
In one embodiment, the first preset torque change period is 2s, the second preset torque change period is 1s, and the change value of the engine output torque within the second preset torque change period 1s is 40n.m, then the torque change rate is 20. In this embodiment, the specific value of the first preset torque change duration or the second preset torque change duration is not limited, and the specific duration is set according to the vehicle requirement.
S243, determining a second correction factor based on the torque change rate and the engine output torque.
In one embodiment, a second correction factor is determined based on the rate of change of torque and the engine output torque, as described in Table 6; when the output torque of the engine is unchanged, the second correction coefficient is gradually increased as the torque change rate is changed from-40 to 140; the second correction coefficient is gradually reduced as the engine output torque is from 0 to 200n.m while the torque change rate is unchanged; for example, when the engine output torque is 60n.m, the second correction coefficient corresponding to the torque change rate-40 is 0.88, and the second correction coefficient corresponding to the torque change rate 110 is 1.15; when the torque change rate is 10, the second correction coefficient corresponding to the engine output torque 30n.m is 1, and the second correction coefficient corresponding to the engine output torque 120n.m is 0.97.
TABLE 6 torque change Rate, engine output Torque and corresponding second correction factors
S244, determining a first torque duty cycle of the electronic thermostat based on the second correction coefficient and the first correction duty cycle.
In one embodiment, a first torque duty cycle of the electronic thermostat is determined based on a product of the second correction coefficient and the first correction duty cycle.
S250, determining a first duty cycle based on the first temperature difference duty cycle, the first correction duty cycle and the first torque duty cycle.
In one embodiment, the first temperature difference duty cycle is corrected according to the first correction coefficient to obtain a first correction duty cycle, and the first correction duty cycle is corrected according to the second correction coefficient to obtain a first torque duty cycle, so that the first torque duty cycle is the first duty cycle after 2 times of correction, and the control precision of the electronic thermostat is improved.
S300, if the temperature of the liquid medium of the engine is greater than or equal to a preset temperature threshold, determining a second duty ratio of the electronic thermostat.
In one embodiment, if the temperature of the liquid medium of the engine is greater than or equal to a preset temperature threshold, a second duty cycle of the electronic thermostat is determined, and the electronic thermostat is thermally protected from over-high temperature of the liquid medium to accelerate heat dissipation.
In one embodiment, the preset temperature threshold is greater than or equal to 108 ℃, the maximum value of the second duty cycle of the electronic thermostat is determined to be 100%, and the specific value of the second duty cycle is set according to the requirements of the vehicle.
S400, determining a third duty ratio of the electronic thermostat based on the supply voltage and the engine liquid medium temperature.
In one embodiment, the wax-type electronic thermostat with an electric heating function is provided, and the third duty ratio of the electronic thermostat is determined based on the power supply voltage and the temperature of the liquid medium of the engine, wherein the third duty ratio represents the maximum duty ratio corresponding to the power supply voltage and the temperature of the liquid medium of the engine, so that the situation that the electronic thermostat is influenced due to the fact that the wax bag is damaged due to the fact that the temperature of the liquid medium is too high, and the electronic thermostat is prevented from being damaged by the power supply voltage of the power battery can be prevented.
In one embodiment, as shown in table 7, a third duty cycle of the electronic thermostat is determined based on the supply voltage and the engine liquid medium temperature; the third duty cycle gradually decreases as the engine liquid medium temperature increases from 85 ℃ to 109 ℃ while the supply voltage remains unchanged; the third duty cycle is also gradually reduced as the supply voltage increases from 8V to 16V while the engine liquid medium temperature remains unchanged; for example, when the power supply voltage is 10V, the third duty ratio corresponding to the engine liquid medium temperature of 85 ℃ is 90%, and the third duty ratio corresponding to the engine liquid medium temperature of 103 ℃ is 35%; when the temperature of the liquid medium of the engine is 97 ℃, the third duty ratio corresponding to the power supply voltage 8V is 97%, and the third duty ratio corresponding to the power supply voltage 16V is 35%.
TABLE 7 Engine liquid Medium temperature, supply Voltage and corresponding third duty cycle
S500, determining a target duty cycle of the electronic thermostat based on the first duty cycle, the second duty cycle and the third duty cycle.
In one embodiment, the target duty cycle of the electronic thermostat is determined based on the first duty cycle, the second duty cycle, and the third duty cycle, thereby further improving control accuracy of the electronic thermostat and reducing energy consumption of the vehicle.
In one embodiment, as shown in fig. 6, determining the target duty cycle of the electronic thermostat based on the first duty cycle, the second duty cycle, and the third duty cycle includes:
s510, performing a large value operation based on the first duty ratio and the second duty ratio, and determining the large value duty ratio of the electronic thermostat.
In one embodiment, the first duty cycle is a duty cycle after 2 times of correction, and the second duty cycle is a duty cycle for performing thermal protection on the electronic thermostat, so that a large value operation is performed based on the first duty cycle and the second duty cycle, and under the condition of ensuring the safety of the electronic thermostat, the large duty cycle in the first duty cycle and the second duty cycle is selected, and the large value duty cycle of the electronic thermostat is determined.
S520, performing small value operation based on the third duty ratio and the large value duty ratio, and determining the target duty ratio of the electronic thermostat.
In one embodiment, the third duty ratio is the maximum duty ratio for avoiding the failure of the wax-type electronic thermostat, and the large duty ratio is the maximum duty ratio for thermally protecting the electronic thermostat, so that the small value operation is performed based on the third duty ratio and the large duty ratio, the small duty ratio is selected under the condition that the safety of the electronic thermostat is ensured, the target duty ratio of the electronic thermostat is determined, the fluctuation of the temperature of the liquid medium of the engine is reduced, and the control precision of the electronic thermostat is further improved.
S600, based on the target duty ratio, controlling the electronic thermostat to adjust the temperature of the engine liquid medium to the target liquid medium temperature.
In one embodiment, based on the target duty ratio, the electronic thermostat is controlled to adjust the temperature of the engine liquid medium to the target liquid medium temperature, and compared with a method adopting proportional-integral-differential control in the prior art, the electronic thermostat is controlled to adjust the temperature of the engine liquid medium by adopting the corrected and screened target duty ratio, and a proportional-integral-differential control method is not required, so that the calibration time is shortened, the response speed of the electronic thermostat is improved, the fluctuation of the temperature of the engine liquid medium is reduced, the control precision of the electronic thermostat is improved, and the thermal management efficiency of a vehicle is improved.
It should be understood that the sequence number of each step in the foregoing embodiment does not mean that the execution sequence of each process should be determined by the function and the internal logic of each process, and should not limit the implementation process of the embodiment of the present application in any way.
Compared with the prior art, the embodiment of the application has the beneficial effects that:
the method is applied to an engine control module, and is used for acquiring the ambient temperature, the vehicle speed, the torque change rate, the engine output torque, the engine liquid medium temperature, the target liquid medium temperature and the power supply voltage of a power battery; determining a first duty cycle of the electronic thermostat based on the ambient temperature, the vehicle speed, the torque rate of change, the engine output torque, the engine liquid medium temperature, and the target liquid medium temperature; if the temperature of the liquid medium of the engine is greater than or equal to a preset temperature threshold, determining a second duty ratio of the electronic thermostat; determining a third duty cycle of the electronic thermostat based on the supply voltage and the engine liquid medium temperature; determining a target duty cycle of the electronic thermostat based on the first duty cycle, the second duty cycle, and the third duty cycle; compared with the prior art adopting a proportional-integral-derivative control method, the electronic thermostat is controlled to adjust the temperature of the engine liquid medium to the target liquid medium temperature based on the target duty ratio, because the corrected first duty ratio is directly obtained according to each parameter, the second duty ratio of thermal protection is obtained, and the third duty ratio related to the power supply voltage of the power battery and the temperature of the engine liquid medium is obtained, the electronic thermostat is controlled to adjust the temperature of the engine liquid medium by adopting the target duty ratio determined in the three duty ratios, and a proportional-integral-derivative control method is not required, so that the calibration time is reduced, the response speed of the electronic thermostat is improved, the fluctuation of the temperature of the engine liquid medium is reduced, the control precision of the electronic thermostat is improved, and the thermal management efficiency of a vehicle is improved.
In a second aspect, as shown in fig. 7, the present embodiment provides a control device for an electronic thermostat, including:
an acquisition module 100 for acquiring an ambient temperature, a vehicle speed, a torque change rate, an engine liquid medium temperature, a target liquid medium temperature, and a power supply voltage;
a first determination module 200 for determining a first duty cycle of the electronic thermostat based on the ambient temperature, the vehicle speed, the torque change rate, the engine liquid medium temperature, and the target liquid medium temperature;
a second determining module 300 configured to determine a second duty cycle of the electronic thermostat if the temperature of the engine liquid medium is greater than or equal to a preset temperature;
a third determination module 400 for determining a third duty cycle of the electronic thermostat based on the supply voltage and the engine liquid medium temperature;
a fourth determining module 500 configured to determine a target duty cycle of the electronic thermostat based on the first duty cycle, the second duty cycle, and the third duty cycle;
the control module 600 is configured to control the electronic thermostat to adjust the engine liquid medium temperature to a target liquid medium temperature based on a target duty cycle.
It should be noted that, because the content of information interaction and execution process between the above devices/modules is based on the same concept as the method embodiment of the present application, specific functions and technical effects thereof may be referred to in the method embodiment section, and will not be described herein again.
It will be apparent to those skilled in the art that, for convenience and brevity of description, only the above-described division of the functional units and modules is illustrated, and in practical application, the above-described functional distribution may be performed by different functional units and modules according to needs, i.e. the internal structure of the apparatus is divided into different functional units or modules to perform all or part of the above-described functions. The functional units and modules in the embodiment may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit, where the integrated units may be implemented in a form of hardware or a form of a software functional unit. In addition, specific names of the functional units and modules are only for convenience of distinguishing from each other, and are not used for limiting the protection scope of the present application. The specific working process of the units and modules in the above system may refer to the corresponding process in the foregoing method embodiment, which is not described herein again.
In a third aspect, an embodiment of the present application provides an electronic device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, the processor implementing the method according to any one of the first aspect when the computer program is executed.
In a fourth aspect, embodiments of the present application provide a vehicle, which includes a control device of the electronic fan according to the second aspect, where the control device performs the method according to any one of the first aspect.
It will be appreciated that the advantages of the second to fourth aspects may be found in the relevant description of the first aspect and are not repeated here.
The integrated units, if implemented in the form of software functional units and sold or used as stand-alone products, may be stored in a computer readable storage medium. Based on such understanding, the present application implements all or part of the flow of the method of the above embodiments, and may be implemented by a computer program to instruct related hardware, where the computer program may be stored in a computer readable storage medium, where the computer program, when executed by a processor, may implement the steps of each of the method embodiments described above. Wherein the computer program comprises computer program code which may be in source code form, object code form, executable file or some intermediate form etc.
The computer readable medium may include at least: any entity or device capable of carrying computer program code to a photographing device/terminal apparatus, recording medium, computer Memory, read-Only Memory (ROM), random access Memory (RAM, random Access Memory), electrical carrier signals, telecommunications signals, and software distribution media. Such as a U-disk, removable hard disk, magnetic or optical disk, etc. In some jurisdictions, computer readable media may not be electrical carrier signals and telecommunications signals in accordance with legislation and patent practice.
In the foregoing embodiments, the descriptions of the embodiments are emphasized, and in part, not described or illustrated in any particular embodiment, reference is made to the related descriptions of other embodiments.
Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.
In the embodiments provided in the present application, it should be understood that the disclosed apparatus/network device and method may be implemented in other manners. For example, the apparatus/network device embodiments described above are merely illustrative, e.g., the division of the modules or units is merely a logical functional division, and there may be additional divisions in actual implementation, e.g., multiple units or components may be combined or integrated into another system, or some features may be omitted, or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection via interfaces, devices or units, which may be in electrical, mechanical or other forms.
The units described as separate units may or may not be physically separate, and units shown as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.
The above embodiments are only for illustrating the technical solution of the present application, and are not limiting; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present application, and are intended to be included in the scope of the present application.
Claims (10)
1. A control method of an electronic thermostat, characterized by being applied to an engine control module, comprising:
acquiring the environment temperature, the vehicle speed, the torque change rate, the engine output torque, the engine liquid medium temperature, the target liquid medium temperature and the power supply voltage of a power battery;
Determining a first duty cycle of an electronic thermostat based on the ambient temperature, the vehicle speed, the torque rate of change, the engine output torque, the engine liquid medium temperature, and the target liquid medium temperature;
if the temperature of the liquid medium of the engine is greater than or equal to a preset temperature threshold, determining a second duty ratio of the electronic thermostat;
determining a third duty cycle of the electronic thermostat based on the supply voltage and the engine liquid medium temperature;
determining a target duty cycle of the electronic thermostat based on the first duty cycle, the second duty cycle, and the third duty cycle;
and controlling the electronic thermostat to adjust the engine liquid medium temperature to the target liquid medium temperature based on the target duty cycle.
2. The method of claim 1, wherein the target liquid medium temperature comprises a first target liquid medium temperature, a second target liquid medium temperature, a third target liquid medium temperature, and a fourth target liquid medium temperature, the engine speeds comprising a first engine speed and a second engine speed, the engine loads comprising a first engine load and a second engine load;
Obtaining a target liquid medium temperature, comprising:
acquiring a first engine speed and a first engine load;
determining a first target liquid medium temperature based on the first engine speed and the first engine load;
determining a second target liquid medium temperature based on the ambient temperature and the first target liquid medium temperature;
acquiring a second engine speed and a second engine load;
determining a third target liquid medium temperature based on the second engine speed and the second engine load;
determining a fourth target liquid medium temperature based on the ambient temperature and the third target liquid medium temperature;
and if the fourth target liquid medium temperature is greater than or less than the second target liquid medium temperature, performing smoothing filter processing based on the second target liquid medium temperature and the fourth target liquid medium temperature, and determining the target liquid medium temperature after smoothing filter processing.
3. The method of claim 1, wherein the determining a first duty cycle of an electronic thermostat based on the ambient temperature, the vehicle speed, the torque rate of change, the engine output torque, the engine liquid medium temperature, and the target liquid medium temperature comprises:
Determining a liquid medium temperature difference of the engine liquid medium temperature and the target liquid medium temperature based on the engine liquid medium temperature and the target liquid medium temperature;
determining a first temperature differential duty cycle of the electronic thermostat based on the engine liquid medium temperature and the liquid medium temperature difference, the first temperature differential duty cycle characterizing a duty cycle corresponding to the engine liquid medium temperature and the liquid medium temperature difference;
determining a first modified duty cycle of the electronic thermostat based on the ambient temperature, the vehicle speed, and the first temperature differential duty cycle, the first modified duty cycle characterizing a modified duty cycle of the first temperature differential duty cycle as a function of the ambient temperature, the vehicle speed;
determining a first torque duty cycle of the electronic thermostat based on the torque rate of change, the engine output torque, and a first correction duty cycle, the first torque duty cycle being indicative of a torque duty cycle at which the first correction duty cycle is corrected in accordance with the torque rate of change, the engine output torque;
a first duty cycle is determined based on the first differential temperature duty cycle, the first modified duty cycle, and the first torque duty cycle.
4. The method of claim 3, wherein,
the determining a first modified duty cycle of the electronic thermostat based on the ambient temperature, the vehicle speed, and the first temperature difference duty cycle includes:
determining a first correction factor based on the ambient temperature and the vehicle speed, the first correction factor characterizing a correction factor corresponding to the ambient temperature, the vehicle speed;
a first modified duty cycle of the electronic thermostat is determined based on the first temperature difference duty cycle and the first modification coefficient.
5. The method of claim 3, wherein,
the determining a first torque duty cycle of the electronic thermostat based on the torque rate of change, the engine output torque, and a first modified duty cycle, comprising:
acquiring the output torque of an engine and the change duration of a preset torque;
determining the torque change rate based on the engine output torque and the preset torque change duration;
determining a second correction factor based on the torque change rate and the engine output torque;
a first torque duty cycle of the electronic thermostat is determined based on the second correction coefficient and the first correction duty cycle.
6. The method of claim 1, wherein,
the determining a target duty cycle of the electronic thermostat based on the first duty cycle, the second duty cycle, and the third duty cycle includes:
performing a large value operation based on the first duty cycle and the second duty cycle, and determining a large value duty cycle of the electronic thermostat;
and performing small value operation based on the third duty ratio and the large value duty ratio, and determining the target duty ratio of the electronic thermostat.
7. The method of claim 1, wherein,
the preset temperature threshold is greater than or equal to 108 ℃.
8. A control device of an electronic thermostat, characterized by comprising:
the acquisition module is used for acquiring the environment temperature, the vehicle speed, the torque change rate, the engine liquid medium temperature, the target liquid medium temperature and the power supply voltage;
a first determination module for determining a first duty cycle of an electronic thermostat based on the ambient temperature, the vehicle speed, the torque rate of change, the engine liquid medium temperature, and the target liquid medium temperature;
the second determining module is used for determining a second duty ratio of the electronic thermostat if the temperature of the liquid medium of the engine is greater than or equal to a preset temperature;
A third determination module for determining a third duty cycle of the electronic thermostat based on the supply voltage and the engine liquid medium temperature;
a fourth determining module configured to determine a target duty cycle of the electronic thermostat based on the first duty cycle, the second duty cycle, and the third duty cycle;
and the control module is used for controlling the electronic thermostat to adjust the temperature of the engine liquid medium to the target liquid medium temperature based on the target duty ratio.
9. An electronic device comprising a memory, a processor and a computer program stored in the memory and executable on the processor, wherein the processor implements the method of any one of claims 1 to 7 when the computer program is executed.
10. A vehicle comprising a control device of an electronic fan according to claim 8, the control device performing the method according to any one of claims 1 to 7.
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| CN202310721436.9A CN116517677A (en) | 2023-06-16 | 2023-06-16 | Control method and device of electronic thermostat, electronic equipment and vehicle |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202310721436.9A CN116517677A (en) | 2023-06-16 | 2023-06-16 | Control method and device of electronic thermostat, electronic equipment and vehicle |
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