Parameter calibration method and device of electric control silicone oil fan and vehicle

Abstract

The application discloses a parameter calibration method and device of an electric control silicone oil fan and a vehicle, and relates to the technical field of electric control silicone oil fans, and aims to improve the accuracy of parameter calibration of the electric control silicone oil fan. The parameter calibration method comprises the following steps: when a first duty cycle of a stall control signal is greater than a preset duty cycle, a first duration during which the first duty cycle is greater than the preset duty cycle is obtained; it is judged whether the first duration is greater than a preset time; if yes, a first actual speed ratio of the electric control silicone oil fan at this time is obtained; the first actual speed ratio is decreased by a first preset step size until it is determined that the first duration does not exceed the preset time, and then the first actual speed ratio after the decrease is determined as a default speed ratio; the default speed ratio is determined as an initial calibration speed ratio; after it is determined that the default speed ratio is the initial calibration speed ratio, it is judged whether a second duty cycle of the stall control signal is greater than the preset duty cycle; if yes, a second duration during which the second duty cycle is greater than the preset duty cycle is obtained; it is judged whether the second duration is greater than the preset time; if yes, a difference between the initial calibration speed ratio and the first preset step size is determined as a final calibration speed ratio.

Description

Technical Field

[0001] This invention relates to the field of vehicle cooling technology, and more particularly to a parameter calibration method, device, and vehicle for an electronically controlled silicone oil fan. Background Technology

[0002] When a vehicle is in motion, the engine generates a lot of heat. If the heat is not dissipated in time, the engine cylinder head, cylinder block, valves, and pistons will expand and deform due to excessive temperature, which will lead to abnormal wear between the piston and the cylinder wall.

[0003] The electronically controlled silicone oil fan is bonded to the engine via silicone oil, and the engine drives the electronically controlled silicone oil fan to achieve the cooling effect.

[0004] If the electronically controlled silicone oil fan rotates at full speed under the drive of the engine, the time required to stop the electronically controlled silicone oil fan will be longer. This means that the process of reducing the amount of silicone oil adhering to the electronically controlled silicone oil fan and the engine will be longer, resulting in higher fuel consumption of the engine.

[0005] Furthermore, for different vehicle models, or even different vehicles, staff need to calibrate different parameters for the cooling system of each vehicle, which can be quite tedious and reduce staff efficiency. Summary of the Invention

[0006] This invention provides a parameter calibration method, device, and vehicle for an electronically controlled silicone oil fan, in order to reduce fuel consumption and the workload of staff.

[0007] According to one aspect of the present invention, a parameter calibration method for an electronically controlled silicone oil fan is provided, comprising:

[0008] The stop control signal of the electronically controlled silicone oil fan is acquired in real time;

[0009] Until the first duty cycle of the stop control signal is greater than the preset duty cycle, the first duration during which the first duty cycle is greater than the preset duty cycle is obtained;

[0010] Determine whether the first duration is greater than a preset time;

[0011] If so, then obtain the first actual speed ratio of the electronically controlled silicone oil fan at this time;

[0012] The first actual speed ratio is decreased by a first preset step size until it is determined that the first duration does not exceed the preset time, and then the first actual speed ratio after the decrease is determined to be the default speed ratio.

[0013] The default speed ratio is set as the initial calibration speed ratio;

[0014] After determining that the default speed ratio is the initial calibration speed ratio, the stop control signal of the electronically controlled silicone oil fan is acquired again;

[0015] Determine whether the second duty cycle of the stop control signal is greater than the preset duty cycle;

[0016] If so, then obtain a second duration during which the second duty cycle is greater than the preset duty cycle;

[0017] Determine whether the second duration is greater than the preset time;

[0018] If so, the difference between the initial calibrated speed ratio and the first preset step size is determined as the final calibrated speed ratio.

[0019] Optionally, before acquiring the stop control signal of the electrically controlled silicone oil fan in real time, the method further includes:

[0020] Obtain the maximum speed ratio of the electronically controlled silicone oil fan, and determine the maximum speed ratio as the default speed ratio.

[0021] Optionally, the parameter calibration method for the electrically controlled silicone oil fan further includes:

[0022] When it is determined that the second duration does not exceed the preset time, the initial calibration speed ratio is increased by the first preset step size until it is determined that the second duration is greater than the preset time. Then, the difference between the increased initial calibration speed ratio and the first preset step size is taken as the final calibration speed ratio.

[0023] Optionally, obtaining the first actual speed ratio of the electrically controlled silicone oil fan at this time includes:

[0024] Obtain the current actual speed of the electronically controlled silicone oil fan and the actual speed of the engine;

[0025] The first actual speed ratio of the electronically controlled silicone oil fan is determined based on the current actual speed of the electronically controlled silicone oil fan and the current actual speed of the engine.

[0026] Optionally, after determining the final speed ratio, the method further includes:

[0027] Continue to acquire the stop control signal of the electronically controlled silicone oil fan;

[0028] Until the third duty cycle of the stop control signal is greater than the preset duty cycle, the third duration of the third duty cycle being greater than the preset duty cycle is obtained;

[0029] Determine whether the third duration is greater than a preset time;

[0030] If so, then obtain the second actual speed ratio of the electronically controlled silicone oil fan at this time;

[0031] The first actual slip ratio is determined based on the final calibrated speed ratio and the second actual speed ratio;

[0032] The first actual slip rate is decreased by a second preset step size until the third duration is determined to be no more than the preset time. The decreased first actual slip rate is then determined as the default slip rate.

[0033] The default slip ratio is determined as the initial calibrated slip ratio;

[0034] After determining the default slip rate as the initial calibrated slip rate, the stop control signal of the electronically controlled silicone oil fan is acquired again;

[0035] Determine whether the fourth duty cycle of the stop control signal is greater than the preset duty cycle;

[0036] If so, then obtain the fourth duration when the fourth duty cycle is greater than the preset duty cycle;

[0037] Determine whether the fourth duration is greater than the preset time;

[0038] If so, the difference between the initial calibration slip rate and the second preset step size is taken as the final calibration slip rate.

[0039] Optionally, before continuing to acquire the stop control signal of the electrically controlled silicone oil fan, the method further includes:

[0040] Obtain the slip curve of the electronically controlled silicone oil fan, and determine the default slip rate based on the slip curve.

[0041] Optionally, the parameter calibration method for the electrically controlled silicone oil fan further includes:

[0042] When it is determined that the fourth duration does not exceed the preset time, the initial calibration slip rate is increased by a second preset step size until it is determined that the fourth duration is greater than the preset time. Then, the difference between the increased initial calibration slip rate and the second preset step size is taken as the final calibration slip rate.

[0043] Optionally, determining the first actual slip ratio based on the final calibrated speed ratio and the current actual speed ratio includes:

[0044] The difference between the final calibrated speed ratio and the second actual speed ratio is determined as the first actual slip ratio.

[0045] According to another aspect of the present invention, a parameter calibration device for an electrically controlled silicone oil fan is provided, comprising:

[0046] The first stop control signal acquisition module is used to acquire the stop control signal of the electronically controlled silicone oil fan in real time.

[0047] The first duration acquisition module is used to acquire the first duration when the first duty cycle of the stop control signal is greater than the preset duty cycle.

[0048] The first-time judgment module is used to determine whether the first duration is greater than a preset time;

[0049] The first actual speed ratio acquisition module is used to acquire the first actual speed ratio of the electronically controlled silicone oil fan when the first judgment module determines that the first duration is greater than the preset time.

[0050] The default speed ratio determination module is used to decrease the first actual speed ratio by a first preset step size until it is determined that the first duration does not exceed a preset time, and then determine the first actual speed ratio after the decrease as the default speed ratio.

[0051] The initial calibration speed ratio determination module is used to determine the default speed ratio as the initial calibration speed ratio;

[0052] The second stop control signal acquisition module is used to acquire the stop control signal of the electronically controlled silicone oil fan again after determining that the default speed ratio is the initial calibration speed ratio;

[0053] The first duty cycle determination module is used to determine whether the second duty cycle of the stop control signal is greater than the preset duty cycle;

[0054] The second duration acquisition module is used to acquire a second duration in which the second duty cycle is greater than the preset duty cycle when the second determination module determines that the second duty cycle of the stop control signal is greater than the preset duty cycle.

[0055] The second time determination module is used to determine whether the second duration is greater than the preset time;

[0056] The final calibration speed ratio determination module is used to determine the difference between the initial calibration speed ratio and the first preset step size as the final calibration speed ratio when the second time judgment module determines that the second duration is greater than the preset time.

[0057] According to another aspect of the present invention, a vehicle is provided, including an electronically controlled silicone oil fan, an engine, a silicone oil chamber, and a parameter calibration device for the electronically controlled silicone oil fan described above.

[0058] The parameter calibration method for an electrically controlled silicone oil fan provided in this embodiment of the invention determines whether the first duty cycle of a stop signal is greater than a preset duty cycle after the stop signal is acquired. If it is greater than the preset duty cycle, timing begins, and the first duration during which the first duty cycle is greater than the preset duty cycle is acquired. If the first duration is greater than a preset time, the first actual speed ratio is decreased by a first preset step size until it is determined that the first duration during which the first duty cycle is greater than the preset duty cycle does not exceed the preset time. The decreased first actual speed ratio is then determined as the default speed ratio, which is used as the initial calibration speed ratio. Subsequently, the stop control signal is acquired again, and timing begins again after the duty cycle of the stop control signal is greater than the preset duty cycle. The second duration during which the duty cycle of the stop control signal is greater than the preset duty cycle is acquired. If... If the second duration is still greater than the preset time, the difference between the initial calibrated speed ratio and the first preset step size is used as the final calibrated speed ratio. In this way, when controlling the amount of silicone oil between the bonding electronically controlled silicone oil fan and the engine based on the final calibrated speed ratio, the time it takes for the electronically controlled silicone oil fan to detach from the engine can match the preset time. That is, when it is necessary to control the electronically controlled silicone oil fan to stop, the time it takes for the silicone oil to flow back to the silicone oil chamber matches the preset time, and the difference between the two is small, which can reduce the fuel consumption of the engine. Furthermore, the parameter calibration method of this electronically controlled silicone oil fan is not limited to a certain vehicle and is applicable to all vehicle models with electronically controlled silicone oil fan devices. This makes it convenient for staff to calibrate the parameters of the electronically controlled silicone oil fans of different vehicles, which can effectively reduce the workload of staff and improve their work efficiency.

[0059] It should be understood that the description in this section is not intended to identify key or essential features of the embodiments of the present invention, nor is it intended to limit the scope of the invention. Other features of the invention will become readily apparent from the following description. Attached Figure Description

[0060] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0061] Figure 1 This is a flowchart of a parameter calibration method for an electrically controlled silicone oil fan provided in an embodiment of the present invention;

[0062] Figure 2 This is a flowchart of another parameter calibration method for an electronically controlled silicone oil fan provided in an embodiment of the present invention;

[0063] Figure 3 This is a flowchart of another parameter calibration method for an electrically controlled silicone oil fan provided in an embodiment of the present invention;

[0064] Figure 4 This is a flowchart of another parameter calibration method for an electrically controlled silicone oil fan provided in an embodiment of the present invention;

[0065] Figure 5 This is a schematic diagram of the structure of another parameter calibration device for an electrically controlled silicone oil fan provided in an embodiment of the present invention. Detailed Implementation

[0066] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0067] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0068] This invention provides a parameter calibration method for an electronically controlled silicone oil fan. This parameter calibration method is applicable to calibrating parameters such as speed ratio and slip rate of an electronically controlled silicone oil fan in a vehicle. This parameter calibration method can be executed by the parameter calibration device for an electronically controlled silicone oil fan provided in this invention, and the parameter calibration device can be implemented by software and / or hardware.

[0069] Figure 1 A flowchart illustrating a parameter calibration method for an electrically controlled silicone oil fan provided in an embodiment of the present invention is shown below. Figure 1 As shown, the method includes:

[0070] S111: Real-time acquisition of the stop control signal of the electronically controlled silicone oil fan.

[0071] Specifically, electronically controlled silicone oil fans are commonly used in vehicle cooling systems to dissipate heat from the engine. The fan is mechanically connected to the engine via the adhesive force of silicone oil, allowing the engine to drive its rotation. Silicone oil is stored in a silicone oil chamber. When the engine heat rises to a preset temperature, a PWM signal controls the opening of an electronically controlled valve in the chamber, allowing silicone oil to flow out and bond the fan to the engine. The greater the degree of valve opening and the longer it remains open, the more silicone oil flows out, resulting in a stronger bond between the engine and the fan. The duty cycle of the PWM signal is inversely proportional to the valve's opening time; a larger duty cycle results in a shorter valve opening time. Therefore, the PWM signal can be understood as the stop signal for the silicone oil fan. It can acquire the stop control signal of the electrically controlled silicone oil fan in real time. Specifically, it can acquire the stop control signal of the electrically controlled silicone oil fan in real time when the temperature reaches the preset temperature value, or it can acquire the speed of the electrically controlled silicone oil fan in real time and start acquiring the stop control signal of the electrically controlled silicone oil fan when the speed reaches a certain value.

[0072] For example, the electronically controlled silicone oil fan can be set to different speeds depending on the heat dissipated by the engine, i.e., based on the temperature. Higher temperatures correspond to higher speeds and stronger cooling capacity. Since the fan speed is related to the amount of silicone oil and the engine speed, the silicone oil amount needs to be set by considering both temperature and engine speed, which in turn determines the opening time of the electronically controlled valve, or the duty cycle of the PWM signal. Conversely, the duty cycle of the PWM signal changes according to variations in temperature and engine speed.

[0073] S112. Until the first duty cycle of the stop control signal is greater than the preset duty cycle, obtain the first duration during which the first duty cycle is greater than the preset duty cycle.

[0074] Specifically, after acquiring the stop control signal, the duty cycle of the stop control signal (i.e., the first duty cycle) can be detected to determine whether the first duty cycle is greater than the preset duty cycle. Timing begins when the first duty cycle of the stop control signal exceeds the preset duty cycle, thus acquiring the first duration of the first duty cycle exceeding the preset duty cycle. The preset duty cycle is preferably 90%.

[0075] It should be noted that the first duty cycle is the current duty cycle of the stop control signal. The "first" and the "second" in subsequent steps are only used to distinguish the duty cycles of the stop control signal at different times or for different purposes in different steps.

[0076] S113. Determine whether the first duration is greater than the preset time; if so, proceed to step S114.

[0077] Specifically, during the timing process of the first duty cycle being greater than the preset duty cycle, i.e., during the acquisition of the first duration, it is possible to set the timing to stop when the first duty cycle does not exceed the preset duty cycle or the first duration exceeds the preset time, and then determine whether the timing duration (i.e. the first duration) is greater than the preset time.

[0078] It is understood that the longer the duty cycle of the PWM signal is greater than the preset duty cycle, the longer it takes for the electronically controlled silicone oil fan to detach from the engine. Therefore, the preset time can be understood as the expected time for the electronically controlled silicone oil fan to detach from the engine. The preset time can be set according to design requirements. For example, in this embodiment of the invention, it is preferably 10s.

[0079] S114. Obtain the first actual speed ratio of the electrically controlled silicone oil fan at this time.

[0080] Specifically, when the first duration is determined to be greater than the preset time, the electronically controlled silicone oil fan is determined to be running at full speed. Since the amount of silicone oil adhering to the engine and the fan is relatively large when the fan is running at full speed, it takes a considerable amount of time for the silicone oil to flow back into the silicone oil chamber before the fan can be detached from the engine. In other words, it takes a considerable amount of time for the fan to stop, and it cannot be stopped within the preset time. During the process of the engine driving the fan, the fan acts as a load on the engine, resulting in higher fuel consumption. Therefore, the calibrated speed ratio of the fan needs to be corrected to ensure that adjusting the PWM signal according to the calibrated speed ratio can maintain heat dissipation while minimizing the amount of silicone oil adhering to the engine and the fan. The calibrated speed ratio can be determined based on the actual speed ratio of the fan; therefore, the first actual speed ratio of the fan at this time can be obtained first.

[0081] For example, when obtaining the first actual speed ratio of the electronically controlled silicone oil fan, the current actual speed of the electronically controlled silicone oil fan and the current actual speed of the engine can be obtained first. Based on the current actual speed of the electronically controlled silicone oil fan and the current actual speed of the engine, the current actual speed ratio of the electronically controlled silicone oil fan (i.e., the first actual speed ratio) can be determined.

[0082] Specifically, the first actual speed ratio can be determined as the ratio of the current actual speed rf1 of the electronically controlled silicone oil fan to the current actual speed rn1 of the engine (i.e., rf1 / rn1).

[0083] S115. Decrease the first actual speed ratio by a first preset step size until it is determined that the first duration does not exceed the preset time, and then determine the first actual speed ratio after the decrease as the default speed ratio.

[0084] S116. Set the default speed ratio as the initial calibration speed ratio.

[0085] Specifically, after determining the current first actual speed ratio, the difference between the first actual speed ratio and the first preset step size h1 is determined as the current default speed ratio i0, i.e., i0 = rf1 / rn1 - h1. Then, the process returns to steps S111 to S113. That is, after determining the default speed ratio i0, the stop control signal is acquired again, and it is determined whether the duty cycle of the stop control signal is greater than the preset duty cycle. If it is greater than the preset duty cycle, timing begins. If the timing duration does not exceed the preset time, the default speed ratio at this time can be determined as the initial calibration speed ratio, i.e., the default speed ratio i0 is determined as the initial calibration speed ratio i1, i.e., i1 = i0. If the timing duration still exceeds the preset time, the process returns to steps S111 to S113 again. This cycle repeats until the timing duration does not exceed the preset time, at which point the loop stops, and the final initial calibration speed ratio is determined as the decremented first actual speed ratio. The first preset step size can be 0.01.

[0086] S117. After setting the default speed ratio as the initial calibration speed ratio, obtain the stop control signal of the electronically controlled silicone oil fan again.

[0087] Specifically, in order to make the final calibrated speed ratio more accurate, that is, to ensure that the time taken for the electronically controlled silicone oil fan to disconnect from the engine after the calibrated speed ratio matches the preset time, the speed ratio can be calibrated again based on the initial calibrated speed ratio after it is determined. At this time, the stop control signal of the electronically controlled silicone oil fan needs to be obtained again.

[0088] S118. Determine whether the second duty cycle of the stop control signal is greater than the preset duty cycle; if so, proceed to step S119.

[0089] S119. Obtain the second duration when the second duty cycle is greater than the preset duty cycle.

[0090] Specifically, after obtaining the stop control signal of the electronically controlled silicone oil fan, it is determined again whether the duty cycle of the stop control signal (i.e., the second duty cycle) is greater than the preset duty cycle, and the timing starts when the second duty cycle is greater than the preset duty cycle, that is, the second duration when the second duty cycle is greater than the preset duty cycle is obtained.

[0091] S120. Determine whether the second duration is greater than the preset time; if so, proceed to step S121.

[0092] S121. The difference between the initial calibrated speed ratio and the first preset step size is taken as the final calibrated speed ratio.

[0093] Specifically, after determining the initial calibration speed ratio i1, it is determined whether the second duration of the duty cycle of the stop control signal being greater than the preset duty cycle is still greater than the preset time. If so, the difference between the initial calibration speed ratio i1 and the first preset step size h1 is taken as the final calibration speed ratio i2, i.e., i2 = i1 - h1. In this way, when controlling the amount of silicone oil in the bonding electronic silicone oil fan and the engine according to the final calibration speed ratio, the time taken for the electronic silicone oil fan to disconnect from the engine matches the preset time. That is, when it is necessary to control the electronic silicone oil fan to stop, the time taken for the silicone oil to flow back to the silicone oil chamber matches the preset time, and the difference between the two is small, which can reduce the engine's fuel consumption.

[0094] The parameter calibration method for an electrically controlled silicone oil fan provided in this embodiment of the invention determines whether the first duty cycle of a stop signal is greater than a preset duty cycle after the stop signal is acquired. If it is greater than the preset duty cycle, timing begins, and the first duration during which the first duty cycle is greater than the preset duty cycle is acquired. If the first duration is greater than a preset time, the first actual speed ratio is decreased by a first preset step size until it is determined that the first duration during which the first duty cycle is greater than the preset duty cycle does not exceed the preset time. The decreased first actual speed ratio is then determined as the default speed ratio, which is used as the initial calibration speed ratio. Subsequently, the stop control signal is acquired again, and timing begins again after the duty cycle of the stop control signal is greater than the preset duty cycle. The second duration during which the duty cycle of the stop control signal is greater than the preset duty cycle is acquired. If... If the second duration is still greater than the preset time, the difference between the initial calibrated speed ratio and the first preset step size is used as the final calibrated speed ratio. In this way, when controlling the amount of silicone oil between the bonding electronically controlled silicone oil fan and the engine based on the final calibrated speed ratio, the time it takes for the electronically controlled silicone oil fan to detach from the engine can match the preset time. That is, when it is necessary to control the electronically controlled silicone oil fan to stop, the time it takes for the silicone oil to flow back to the silicone oil chamber matches the preset time, and the difference between the two is small, which can reduce the fuel consumption of the engine. Furthermore, the parameter calibration method of this electronically controlled silicone oil fan is not limited to a certain vehicle and is applicable to all vehicle models with electronically controlled silicone oil fan devices. This makes it convenient for staff to calibrate the parameters of the electronically controlled silicone oil fans of different vehicles, which can effectively reduce the workload of staff and improve their work efficiency.

[0095] Figure 2 A flowchart of another parameter calibration method for an electrically controlled silicone oil fan provided in an embodiment of the present invention is shown below. Figure 2 As shown, the method includes:

[0096] S211. Obtain the maximum speed ratio of the electronically controlled silicone oil fan and determine the maximum speed ratio as the default speed ratio.

[0097] Specifically, before calibrating the speed ratio of the electrically controlled silicone oil fan, the maximum speed ratio of the electrically controlled silicone oil fan can be temporarily set as the default speed ratio.

[0098] S212. Real-time acquisition of the stop control signal of the electrically controlled silicone oil fan.

[0099] S213. Determine whether the first duty cycle of the stop control signal is greater than the preset duty cycle; if yes, proceed to step S214; if no, proceed to step S212.

[0100] S214. Obtain the first duration when the first duty cycle is greater than the preset duty cycle.

[0101] S215. Determine whether the first duration is greater than the preset time. If yes, proceed to step S218; otherwise, proceed to step S216.

[0102] S216. Set the default speed ratio as the initial calibration speed ratio.

[0103] S217. Obtain the first actual speed ratio of the electronically controlled silicone oil fan at this time.

[0104] S218. Determine the difference between the first actual speed ratio and the preset step size as the default speed ratio; and return to the execution step S212.

[0105] S219. Obtain the stop control signal for the electronically controlled silicone oil fan again.

[0106] S220. Determine whether the second duty cycle of the stop control signal is greater than the preset duty cycle; if yes, proceed to step S221; if no, proceed to S219.

[0107] S221. Obtain the second duration when the second duty cycle is greater than the preset duty cycle.

[0108] S222. Determine whether the second duration is greater than the preset time; if yes, execute S223; if no, execute S224.

[0109] S223. The difference between the initial calibrated speed ratio and the first preset step size is determined as the final calibrated speed ratio.

[0110] S224. Increment the initial calibrated speed ratio by the first preset step size; and return to step S219.

[0111] Specifically, if after calibrating the speed ratio to the initial calibrated speed ratio i1, the second duration of the duty cycle of the stop control signal being greater than the preset duty cycle is not greater than the preset time, then the sum of the initial calibrated speed ratio i1 and the first preset step size h1 is determined as the new initial calibrated speed ratio i1, i.e., i1 = i1 + h1. Then, steps S219 to S222 are executed again until the second duration is greater than the preset time. The difference between the increased initial calibrated speed ratio i1 and the first preset step size h1 is determined as the final calibrated speed ratio i2, i.e., i2 = i1 - h1. In this way, the determined final calibrated speed ratio is more consistent with the preset time. This ensures that when controlling the amount of silicone oil in the bonding electronic silicone oil fan and the engine based on the final calibrated speed ratio, the time it takes for the electronic silicone oil fan to detach from the engine is consistent with the preset time. That is, when it is necessary to control the electronic silicone oil fan to stop, the time it takes for the silicone oil to flow back to the silicone oil chamber is consistent with the preset time, with a small difference between the two, which can reduce the engine's fuel consumption.

[0112] Optional, Figure 3 This is a flowchart of another parameter calibration method for an electrically controlled silicone oil fan provided in an embodiment of the present invention, as shown below. Figure 3 As shown, the parameter calibration method for this electrically controlled silicone oil fan includes:

[0113] S311. Obtain the maximum speed ratio of the electronically controlled silicone oil fan and determine the maximum speed ratio as the default speed ratio.

[0114] Specifically, before calibrating the speed ratio of the electrically controlled silicone oil fan, the maximum speed ratio of the electrically controlled silicone oil fan can be temporarily set as the default speed ratio.

[0115] S312: Real-time acquisition of the stop control signal of the electrically controlled silicone oil fan.

[0116] S313. Determine whether the first duty cycle of the stop control signal is greater than the preset duty cycle; if yes, proceed to step S314; if no, proceed to step S312.

[0117] S314. Obtain the first duration when the first duty cycle is greater than the preset duty cycle.

[0118] S315. Determine whether the first duration is greater than the preset time. If yes, proceed to step S318; otherwise, proceed to step S316.

[0119] S316. Set the default speed ratio as the initial calibration speed ratio.

[0120] S317. Obtain the first actual speed ratio of the electrically controlled silicone oil fan at this time.

[0121] S318. Determine the difference between the first actual speed ratio and the preset step size as the default speed ratio; and return to execute step S312.

[0122] S319. Obtain the stop control signal of the electronically controlled silicone oil fan again.

[0123] S320. Determine whether the second duty cycle of the stop control signal is greater than the preset duty cycle; if yes, proceed to step S321; if no, proceed to S319.

[0124] S321. Obtain the second duration when the second duty cycle is greater than the preset duty cycle.

[0125] S322. Determine whether the second duration is greater than the preset time; if yes, execute S323; if no, execute S324.

[0126] S323. The difference between the initial calibrated speed ratio and the first preset step size is determined as the final calibrated speed ratio.

[0127] S324. Increment the initial calibrated speed ratio by the first preset step size; and return to step S319.

[0128] S325, Continue to acquire the stop control signal of the electronically controlled silicone oil fan.

[0129] S326. Until the third duty cycle of the stop control signal is greater than the preset duty cycle, obtain the third duration when the third duty cycle is greater than the preset duty cycle.

[0130] S327. Determine whether the third duration is greater than the preset time; if so, proceed to step S328.

[0131] S328, Obtain the second actual speed ratio of the electrically controlled silicone oil fan at this time.

[0132] Specifically, slip can be understood as the difference between the input speed (set speed) and the output speed of the electronically controlled silicone oil fan, and the slip ratio is the ratio of slip to the input speed. After determining the final calibrated speed ratio, the first actual slip ratio can be determined based on the final calibrated speed ratio and the second actual speed ratio of the electronically controlled silicone oil fan at this time. Similarly, timing starts when the duty cycle of the stop control signal is greater than the preset duty cycle, and stops when the duty cycle does not exceed the preset duty cycle, or when the duration of the duty cycle being greater than the preset duty cycle is greater than the preset time. That is, the third duration of the third duty cycle being greater than the preset duty cycle is obtained. When the third duration is greater than the preset time, the second actual speed ratio of the electronically controlled silicone oil fan at this time is obtained.

[0133] For example, when obtaining the second actual speed ratio of the electronically controlled silicone oil fan, the current actual speed of the electronically controlled silicone oil fan and the current actual speed of the engine can be obtained first. Based on the current actual speed of the electronically controlled silicone oil fan and the current actual speed of the engine, the current actual speed ratio of the electronically controlled silicone oil fan (i.e., the second actual speed ratio) can be determined.

[0134] Specifically, the second actual speed ratio can be determined as the ratio of the current actual speed rf2 of the electronically controlled silicone oil fan to the current actual speed rn2 of the engine (i.e., rf2 / rn2).

[0135] S329. Determine the first actual slip ratio based on the final calibrated speed ratio and the second actual speed ratio.

[0136] Specifically, the difference between the final calibrated speed ratio and the second actual speed ratio can be determined as the first actual slip ratio, that is, the first actual slip ratio is i2-rf2 / rn2.

[0137] S330. Decrease the first actual slip rate by a second preset step size until the third duration is determined to be no more than a preset time, and then determine the reduced first actual slip rate as the default slip rate.

[0138] S331. Set the default slip rate as the initial calibration slip rate.

[0139] Specifically, after determining the current first actual slip ratio, the difference between the first actual slip ratio and the second preset step size h2 is determined as the current default slip ratio k0, i.e., k0 = (i2 - rf2 / rn2) - h2. Then, the process returns to steps S325 to S327. That is, after determining the default slip ratio k0, the stop control signal is acquired again, and it is determined whether the duty cycle of the stop control signal is greater than the preset duty cycle. If it is greater than the preset duty cycle, timing begins. If the timing duration does not exceed the preset time, the default slip ratio k0 is determined to be the initial calibration slip ratio k1, i.e., k1 = k0. If the timing duration still exceeds the preset time, the process returns to steps S325 to S327 again. This cycle repeats until the timing duration does not exceed the preset time, at which point the loop stops, and the final initial calibration slip ratio is determined to be the decremented first actual slip ratio. The second preset step size can be 0.01.

[0140] S332. After setting the default slip rate as the initial calibrated slip rate, obtain the stop control signal of the electronically controlled silicone oil fan again.

[0141] Specifically, in order to make the final calibrated speed ratio more accurate, that is, to make the time for the electronically controlled silicone oil fan to disconnect from the engine after calibrating the slip ratio match the preset time, after determining the initial calibrated slip ratio, the slip ratio can be calibrated again based on the initial calibrated speed ratio. At this time, the stop control signal of the electronically controlled silicone oil fan needs to be obtained again.

[0142] S333. Determine whether the fourth duty cycle of the stop control signal is greater than the preset duty cycle; if so, proceed to step S334.

[0143] S334. Obtain the fourth duration when the fourth duty cycle is greater than the preset duty cycle.

[0144] Specifically, after obtaining the stop control signal of the electronically controlled silicone oil fan, it is determined again whether the duty cycle of the stop control signal (i.e., the fourth duty cycle) is greater than the preset duty cycle, and the timing starts when the fourth duty cycle is greater than the preset duty cycle, that is, the fourth duration when the fourth duty cycle is greater than the preset duty cycle is obtained.

[0145] S335. Determine whether the fourth duration is greater than the preset time; if so, proceed to step S336.

[0146] S336. The difference between the initial calibration slip rate and the second preset step size is taken as the final calibration slip rate.

[0147] Specifically, after determining the default slip ratio as the initial calibrated slip ratio k1, it is determined whether the fourth duration of the duty cycle of the stop control signal being greater than the preset duty cycle is still greater than the preset time. If so, the difference between the initial calibrated slip ratio k1 and the second preset step size h2 is taken as the final calibrated slip ratio k2, i.e., k2 = k1 - h2. In this way, when controlling the amount of silicone oil in the bonding electronically controlled silicone oil fan and the engine based on the final calibrated slip ratio k2 and the final calibrated speed ratio i2, the time taken for the electronically controlled silicone oil fan to detach from the engine matches the preset time. That is, when it is necessary to control the electronically controlled silicone oil fan to stop, the time taken for the silicone oil to flow back to the silicone oil chamber matches the preset time, and the difference between the two is small, which can reduce the engine's fuel consumption.

[0148] Optional, Figure 4 This is a flowchart of another parameter calibration method for an electrically controlled silicone oil fan provided in an embodiment of the present invention, as shown below. Figure 4 As shown, the parameter calibration method for this electrically controlled silicone oil fan includes:

[0149] S411. Obtain the maximum speed ratio of the electronically controlled silicone oil fan and determine the maximum speed ratio as the default speed ratio.

[0150] S412: Real-time acquisition of the stop control signal for the electrically controlled silicone oil fan.

[0151] S413. Determine whether the first duty cycle of the stop control signal is greater than the preset duty cycle; if yes, proceed to step S414; if no, proceed to step S412.

[0152] S414. Obtain the first duration when the first duty cycle is greater than the preset duty cycle.

[0153] S415. Determine whether the first duration is greater than the preset time. If yes, proceed to step S418; otherwise, proceed to step S416.

[0154] S416. Set the default speed ratio as the initial calibration speed ratio.

[0155] S417, Obtain the first actual speed ratio of the electronically controlled silicone oil fan at this time.

[0156] S418. Determine the difference between the first actual speed ratio and the preset step size as the default speed ratio; and return to execute step S412.

[0157] S419. Obtain the stop control signal for the electronically controlled silicone oil fan again.

[0158] S420. Determine whether the second duty cycle of the stop control signal is greater than the preset duty cycle; if yes, proceed to step S421; if no, proceed to S419.

[0159] S421. Obtain the second duration when the second duty cycle is greater than the preset duty cycle.

[0160] S422. Determine whether the second duration is greater than the preset time; if yes, execute S423; if no, execute S424.

[0161] S423. The difference between the initial calibrated speed ratio and the first preset step size is determined as the final calibrated speed ratio.

[0162] S424. Increment the initial calibrated speed ratio by the first preset step size; and return to step S419.

[0163] S425. Obtain the slip curve of the electronically controlled silicone oil fan, and determine the default slip rate based on the slip curve.

[0164] Specifically, the slope of the slip curve can be determined as the default slip rate of the electronically controlled silicone oil fan.

[0165] S426, Continue to acquire the stop control signal of the electronically controlled silicone oil fan.

[0166] S427. Determine whether the third duty cycle of the stop control signal is greater than the preset duty cycle; if yes, proceed to step S428; if no, proceed to step S426.

[0167] S428. Obtain the third duration when the third duty cycle is greater than the preset duty cycle.

[0168] S429. Determine whether the third duration is greater than the preset time; if yes, proceed to step S431; if no, proceed to step S430.

[0169] S430, Set the default slip rate as the initial calibration slip rate.

[0170] S431, Obtain the second actual speed ratio of the electronically controlled silicone oil fan at this time.

[0171] S432. Determine the first actual slip ratio based on the final calibrated speed ratio and the second actual speed ratio.

[0172] S433, Set the first actual slip ratio and the second preset step size as the default slip ratio; return to execute S426.

[0173] S434. Obtain the stop control signal for the electronically controlled silicone oil fan again.

[0174] S435. Determine whether the fourth duty cycle of the stop control signal is greater than the preset duty cycle; if yes, proceed to step S436; if no, proceed to step S434.

[0175] S436. Obtain the fourth duration when the fourth duty cycle is greater than the preset duty cycle.

[0176] S437. Determine whether the fourth duration is greater than the preset time; if yes, proceed to step S438; if no, proceed to step S439.

[0177] Specifically, if the default slip ratio is determined as the initial calibration slip ratio k1, and the fourth duration of the duty cycle of the stop control signal being greater than the preset duty cycle is not greater than the preset time, then the sum of the initial calibration slip ratio k1 and the second preset step size h2 is determined as the new initial calibration slip ratio k1, i.e., k1 = k1 + h2. Then, steps S434 to S437 are executed again until the fourth duration is greater than the preset time. Finally, the difference between the incremented initial calibration slip ratio k1 and the second preset step size h2 is determined as the final calibration slip ratio k2, i.e., k2 = k1 - h2. In this way, the determined final calibration slip ratio k2 and final calibration speed ratio i2 can be more consistent with the preset time. Even when controlling the amount of silicone oil in the bonding electronic silicone oil fan and the engine based on the final calibration slip ratio and the final calibration speed ratio, the time for the electronic silicone oil fan to disconnect from the engine can be consistent with the preset time. That is, when it is necessary to control the electronic silicone oil fan to stop, the time for the silicone oil to flow back to the silicone oil chamber is consistent with the preset time, and the difference between the two is small, which can reduce the fuel consumption of the engine.

[0178] Based on the same inventive concept, embodiments of the present invention also provide a parameter calibration device for an electrically controlled silicone oil fan. This parameter calibration device includes the parameter calibration method for an electrically controlled silicone oil fan provided in any embodiment of the present invention. Therefore, the parameter calibration device for an electrically controlled silicone oil fan provided in embodiments of the present invention includes the technical features of the parameter calibration method for an electrically controlled silicone oil fan provided in any embodiment of the present invention, and can achieve the beneficial effects of the parameter calibration method for an electrically controlled silicone oil fan provided in any embodiment of the present invention. Similarities can be referred to the above description of the parameter calibration method for an electrically controlled silicone oil fan provided in embodiments of the present invention, and will not be repeated here.

[0179] Optional, Figure 5 This is a schematic diagram of the structure of a parameter calibration device for an electrically controlled silicone oil fan provided in an embodiment of the present invention, as shown below. Figure 5 As shown, the parameter calibration device for the electrically controlled silicone oil fan includes a first stop control signal acquisition module 10, used to acquire the stop control signal of the electrically controlled silicone oil fan in real time; a first duration acquisition module 20, used to acquire a first duration when the first duty cycle of the stop control signal is greater than the preset duty cycle; a first time judgment module 30, used to judge whether the first duration is greater than the preset time; a first actual speed ratio acquisition module 40, used to acquire the first actual speed ratio of the electrically controlled silicone oil fan at this time when the first judgment module determines that the first duration is greater than the preset time; a first default speed ratio determination module 50, used to decrease the first actual speed ratio by a first preset step size until it is determined that the first duration does not exceed the preset time, and then determine the decreased first actual speed ratio as the default speed ratio; and an initial calibration speed ratio determination module. Module 60 is used to determine the default speed ratio as the initial calibration speed ratio; the second stop control signal acquisition module 70 is used to acquire the stop control signal of the electronically controlled silicone oil fan again after determining the default speed ratio as the initial calibration speed ratio; the first duty cycle judgment module 80 is used to determine whether the second duty cycle of the stop control signal is greater than the preset duty cycle; the second duration acquisition module 90 is used to acquire the second duration when the second duty cycle of the stop control signal is greater than the preset duty cycle when the second judgment module determines that the second duty cycle of the stop control signal is greater than the preset duty cycle; the second time judgment module 100 is used to determine whether the second duration is greater than the preset time; the first final calibration speed ratio determination module 110 is used to determine the difference between the initial calibration speed ratio and the first preset step size as the final calibration speed ratio when the second time judgment module determines that the second duration is greater than the preset time.

[0180] The parameter calibration device for the electronically controlled silicone oil fan provided in this embodiment of the invention, when controlling the amount of silicone oil bonded between the electronically controlled silicone oil fan and the engine according to the final calibration speed ratio, can ensure that the time for the electronically controlled silicone oil fan to detach from the engine matches the preset time. That is, when it is necessary to control the electronically controlled silicone oil fan to stop, the time for the silicone oil to flow back to the silicone oil chamber matches the preset time, with a small difference between the two, which can reduce the engine's fuel consumption. Furthermore, the parameter calibration method for the electronically controlled silicone oil fan is not limited to a certain vehicle and is applicable to all vehicle models equipped with electronically controlled silicone oil fan devices, making it convenient for staff to calibrate the parameters of the electronically controlled silicone oil fans of different vehicles, effectively reducing the workload of staff and improving their work efficiency.

[0181] Optionally, the parameter calibration device for the electrically controlled silicone oil fan also includes a maximum speed ratio acquisition module, used to acquire the maximum speed ratio of the electrically controlled silicone oil fan before the first stop control signal acquisition module 10 acquires the stop control signal of the electrically controlled silicone oil fan in real time; and a second default speed ratio determination module, used to determine the maximum speed ratio as the default speed ratio.

[0182] Optionally, the parameter calibration device for the electrically controlled silicone oil fan also includes a second final calibration speed ratio determination module, which is used to increase the initial calibration speed ratio by a first preset step size when it is determined that the second duration does not exceed a preset time, until it is determined that the second duration is greater than the preset time, and then take the difference between the increased initial calibration speed ratio and the first preset step size as the final calibration speed ratio.

[0183] Optionally, the first actual speed ratio acquisition module includes an actual speed acquisition unit for acquiring the current actual speed of the electronically controlled silicone oil fan and the current actual speed of the engine; and a first actual speed ratio determination unit for determining the first actual speed ratio of the electronically controlled silicone oil fan at this time based on the current actual speed of the electronically controlled silicone oil fan and the current actual speed of the engine.

[0184] Optionally, the parameter calibration device for the electrically controlled silicone oil fan further includes a third stop control signal acquisition module, which continues to acquire the stop control signal of the electrically controlled silicone oil fan; a third duration acquisition module, used to acquire a third duration when the third duty cycle of the stop control signal is greater than the preset duty cycle; a third time judgment module, used to judge whether the third duration is greater than the preset time; a second actual speed ratio acquisition module, used to acquire the second actual speed ratio of the electrically controlled silicone oil fan when the third time judgment module determines that the third duration is greater than the preset time; a first actual slip ratio determination module, used to determine the first actual slip ratio based on the final calibrated speed ratio and the second actual speed ratio; a first default slip ratio determination module, used to decrease the first actual slip ratio by a second preset step size until it is determined that the third duration does not exceed the preset time, and then determine the decreased first actual slip ratio as the default slip ratio; and an initial calibration slip ratio determination module, used to determine the default slip ratio as the initial calibration slip ratio.

[0185] The fourth duration acquisition module is used to acquire the stop control signal of the electronically controlled silicone oil fan again after the default slip rate is determined as the initial calibration slip rate; the second duty cycle judgment module is used to determine whether the fourth duty cycle of the stop control signal is greater than the preset duty cycle; the fourth duration acquisition module is used to acquire the fourth duration when the fourth duty cycle of the stop control signal is greater than the preset duty cycle when the second duty cycle judgment module determines that the fourth duty cycle of the stop control signal is greater than the preset duty cycle; the fourth time judgment module is used to determine whether the fourth duration is greater than the preset time; the first final calibration slip rate determination module is used to take the difference between the initial calibration slip rate and the second preset step size as the final calibration slip rate when the fourth time judgment module determines whether the fourth duration is greater than the preset time.

[0186] Optionally, the parameter calibration device for the electrically controlled silicone oil fan also includes a slip rate curve acquisition module for acquiring the slip rate curve of the electrically controlled silicone oil fan, and a second default slip rate determination module for determining the default slip rate based on the slip rate curve.

[0187] Optionally, the parameter calibration device for the electrically controlled silicone oil fan also includes a second final calibration slip rate determination module, which is used to increase the initial calibration slip rate by a second preset step size when it is determined that the fourth duration does not exceed a preset time, until it is determined that the fourth duration is greater than a preset time, and then take the difference between the increased initial calibration slip rate and the second preset step size as the final calibration slip rate.

[0188] Optionally, the first actual slip ratio determination module includes a first actual slip ratio determination unit, used to determine the difference between the final calibrated speed ratio and the second actual speed ratio as the first actual slip ratio.

[0189] Based on the same inventive concept, this embodiment of the invention also provides a vehicle. The parameter calibration device for the electronically controlled silicone oil fan includes an electronically controlled silicone oil fan, an engine, a silicone oil chamber, and the parameter calibration device for the electronically controlled silicone oil fan provided in any embodiment of the invention. Therefore, the vehicle provided in this embodiment of the invention includes the technical features of the parameter calibration device for the electronically controlled silicone oil fan provided in any embodiment of the invention, and can achieve the beneficial effects of the parameter calibration device for the electronically controlled silicone oil fan provided in any embodiment of the invention. The similarities can be referred to the above description of the parameter calibration device for the electronically controlled silicone oil fan provided in this embodiment of the invention, and will not be repeated here.

[0190] It should be understood that the various forms of processes shown above can be used, with steps reordered, added, or deleted. For example, the steps described in this invention can be executed in parallel, sequentially, or in different orders, as long as the desired result of the technical solution of this invention can be achieved, and this is not limited herein.

[0191] The specific embodiments described above do not constitute a limitation on the scope of protection of this invention. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this invention should be included within the scope of protection of this invention.

Claims

1. A parameter calibration method for an electronically controlled silicone oil fan, characterized in that, include: Obtain the maximum speed ratio of the electronically controlled silicone oil fan and set the maximum speed ratio as the default speed ratio; The stop control signal of the electronically controlled silicone oil fan is acquired in real time; Until the first duty cycle of the stop control signal is greater than the preset duty cycle, the first duration during which the first duty cycle is greater than the preset duty cycle is obtained; Determine whether the first duration is greater than a preset time; If so, then obtain the first actual speed ratio of the electronically controlled silicone oil fan at this time; The first actual speed ratio is decreased by a first preset step size, and the step of obtaining the stop control signal of the electronically controlled silicone oil fan in real time is returned; until it is determined that the first duration does not exceed the preset time, the first actual speed ratio after the decrease is determined to be the default speed ratio; The default speed ratio is set as the initial calibration speed ratio; After determining that the default speed ratio is the initial calibration speed ratio, the stop control signal of the electronically controlled silicone oil fan is acquired again; Determine whether the second duty cycle of the stop control signal is greater than the preset duty cycle; If so, then obtain a second duration during which the second duty cycle is greater than the preset duty cycle; If not, return to the step of obtaining the stop control signal of the electronically controlled silicone oil fan again; Determine whether the second duration is greater than the preset time; If so, the difference between the initial calibrated speed ratio and the first preset step size is determined as the final calibrated speed ratio.

2. The parameter calibration method for an electronically controlled silicone oil fan according to claim 1, characterized in that, Also includes: When it is determined that the second duration does not exceed the preset time, the initial calibration speed ratio is increased by the first preset step size, and the process returns to the step of obtaining the stop control signal of the electronically controlled silicone oil fan again; until it is determined that the second duration is greater than the preset time, the difference between the increased initial calibration speed ratio and the first preset step size is taken as the final calibration speed ratio.

3. The parameter calibration method for an electronically controlled silicone oil fan according to claim 1, characterized in that, Obtaining the first actual speed ratio of the electrically controlled silicone oil fan at this time includes: Obtain the current actual speed of the electronically controlled silicone oil fan and the actual speed of the engine; The first actual speed ratio of the electronically controlled silicone oil fan is determined based on the current actual speed of the electronically controlled silicone oil fan and the current actual speed of the engine.

4. The parameter calibration method for an electronically controlled silicone oil fan according to claim 1 or 2, characterized in that, After determining the final calibrated speed ratio, the following steps are also included: Obtain the slip curve of the electronically controlled silicone oil fan, and determine the default slip rate based on the slip curve; Continue to acquire the stop control signal of the electronically controlled silicone oil fan; Until the third duty cycle of the stop control signal is greater than the preset duty cycle, the third duration of the third duty cycle being greater than the preset duty cycle is obtained; Determine whether the third duration is greater than a preset time; if not, determine the default slip rate as the initial calibration slip rate. If so, then obtain the second actual speed ratio of the electronically controlled silicone oil fan at this time; The first actual slip ratio is determined based on the final calibrated speed ratio and the second actual speed ratio; The first actual slip rate is decreased by a second preset step size, and the process returns to continue acquiring the stop control signal of the electronically controlled silicone oil fan; until the third duration is determined to be no more than the preset time, the decreased first actual slip rate is determined as the default slip rate; The default slip ratio is determined as the initial calibrated slip ratio; After determining the default slip rate as the initial calibrated slip rate, the stop control signal of the electronically controlled silicone oil fan is acquired again; Determine whether the fourth duty cycle of the stop control signal is greater than the preset duty cycle; If so, then obtain the fourth duration when the fourth duty cycle is greater than the preset duty cycle; Determine whether the fourth duration is greater than the preset time; If so, the difference between the initial calibration slip rate and the second preset step size is taken as the final calibration slip rate.

5. The parameter calibration method for an electronically controlled silicone oil fan according to claim 4, characterized in that, Also includes: When it is determined that the fourth duration does not exceed the preset time, the initial calibration slip rate is incremented by the second preset step size, and the process returns to the step of obtaining the stop control signal of the electronically controlled silicone oil fan again after determining the default slip rate as the initial calibration slip rate; until it is determined that the fourth duration is greater than the preset time, the difference between the incremented initial calibration slip rate and the second preset step size is taken as the final calibration slip rate.

6. The parameter calibration method for an electronically controlled silicone oil fan according to claim 4, characterized in that, Determining the first actual slip ratio based on the final calibrated speed ratio and the second actual speed ratio includes: The difference between the final calibrated speed ratio and the second actual speed ratio is determined as the first actual slip ratio.

7. A parameter calibration device for an electrically controlled silicone oil fan, characterized in that, include: The maximum speed ratio acquisition module is used to acquire the maximum speed ratio of the electronically controlled silicone oil fan before the first stop control signal acquisition module acquires the stop control signal of the electronically controlled silicone oil fan in real time. The second default speed ratio determination module is used to determine the maximum speed ratio as the default speed ratio; The first stop control signal acquisition module is used to acquire the stop control signal of the electronically controlled silicone oil fan in real time. The first duration acquisition module is used to acquire the first duration when the first duty cycle of the stop control signal is greater than the preset duty cycle. The first-time judgment module is used to determine whether the first duration is greater than a preset time; The first actual speed ratio acquisition module is used to acquire the first actual speed ratio of the electronically controlled silicone oil fan when the first judgment module determines that the first duration is greater than the preset time. The first default speed ratio determination module is used to decrease the first actual speed ratio by a first preset step size and return to the step of real-time acquisition of the stop control signal of the electronically controlled silicone oil fan; until it is determined that the first duration does not exceed the preset time, the first actual speed ratio after the decrease is determined to be the default speed ratio; The initial calibration speed ratio determination module is used to determine the default speed ratio as the initial calibration speed ratio; The second stop control signal acquisition module is used to acquire the stop control signal of the electronically controlled silicone oil fan again after determining that the default speed ratio is the initial calibration speed ratio; The first duty cycle determination module is used to determine whether the second duty cycle of the stop control signal is greater than the preset duty cycle; The second duration acquisition module is used to acquire a second duration in which the second duty cycle is greater than the preset duty cycle when the second determination module determines that the second duty cycle of the stop control signal is greater than the preset duty cycle. And when the second judgment module determines that the second duty cycle of the stop control signal is less than or equal to the preset duty cycle, it returns to the step of obtaining the stop control signal of the electronically controlled silicone oil fan again; The second time determination module is used to determine whether the second duration is greater than the preset time; The final calibration speed ratio determination module is used to determine the difference between the initial calibration speed ratio and the first preset step size as the final calibration speed ratio when the second time judgment module determines that the second duration is greater than the preset time.

8. A vehicle, characterized in that, It includes an electronically controlled silicone oil fan, an engine, a silicone oil chamber, and a parameter calibration device for the electronically controlled silicone oil fan as described in claim 7.

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