A silicon oil fan clutch based on fuzzy logic control of the tilt angle of the cooling ribs

Abstract

This invention discloses a silicone oil fan clutch based on fuzzy logic control of the tilt angle of the heat dissipation ribs. The clutch includes a clutch housing, heat dissipation ribs, a track ring, a driven gear, a driving gear, a motor, a temperature sensor, a motor mounting plate, a drive shaft, a drive disc, a working chamber, a valve plate, and a positioning pin. The temperature sensor collects the silicone oil temperature in the working chamber in real time. After processing the collected temperature signal through a fuzzy logic control algorithm, it outputs target tilt angle parameters and control commands for adjusting the heat dissipation ribs. This drives the motor to adjust the tilt angle of the heat dissipation ribs relative to the clutch housing through the track ring gear transmission group. This invention adaptively and dynamically regulates the heat dissipation efficiency based on the real-time temperature of the silicone oil in the working chamber, offering advantages such as strong applicability, stable and reliable operation, and controllable heat dissipation efficiency.

Description

Technical Field

[0001] This invention relates to the field of silicone oil fan clutch technology, specifically to a silicone oil fan clutch based on fuzzy logic control of the tilt angle of the heat dissipation fins. Background Technology

[0002] With the development of agriculture in my country towards specialization and mechanization, agricultural machinery is undergoing iterative upgrades towards higher efficiency and larger scale. The engine power of agricultural machinery is constantly increasing. Simultaneously, because agricultural machinery often faces prolonged high-load operating conditions, the performance of the engine cooling system directly affects the operational stability of the machinery and the engine's lifespan. The silicone oil fan clutch, as a core functional component of the engine cooling system, works on the following principle: torque is transmitted through the viscous shearing action of silicone oil. The speed of the silicone oil fan can be coupled and adjusted according to the engine speed, providing dynamic adjustment of heat dissipation efficiency. This effectively reduces engine temperature and improves engine operating efficiency.

[0003] Existing silicone oil fan clutches have advantages such as simple and reliable structure and low manufacturing cost, but they also have the following technical defects: First, when the silicone oil temperature is too low, it is difficult to effectively insulate the silicone oil in the working chamber, which can easily lead to excessive heat dissipation of the silicone oil and unnecessary loss of engine power. Second, when the silicone oil temperature is too high, the viscosity of the silicone oil will decrease as the temperature rises, which will reduce the coupling efficiency of the silicone oil fan clutch and fail to meet the heat dissipation requirements under high load conditions. Finally, there is a lack of real-time monitoring of the silicone oil temperature in the working chamber and a dynamic feedback control mechanism based on temperature signals, which results in low heat dissipation efficiency, high energy consumption, and poor adaptability to different temperature conditions, making it difficult to meet the long-term high-load operation requirements of current high-efficiency and large-scale agricultural machinery.

[0004] Therefore, it is necessary to design a silicone oil fan clutch in agricultural machinery that can sense temperature changes in real time and adaptively adjust heat dissipation efficiency. This would improve the adaptability of the traditional silicone oil fan clutch to heat dissipation efficiency under different temperature conditions of silicone oil in the working chamber, thereby ensuring the efficient operation of the engine cooling system, enhancing engine stability, extending engine life, and improving the operational reliability of agricultural machinery. Summary of the Invention

[0005] To address the aforementioned technical shortcomings, the present invention aims to design a silicone oil fan clutch based on fuzzy logic control of the tilt angle of the heat dissipation ribs. Its core is to solve the problem that, under the existing technical approach, the silicone oil temperature cannot be maintained when it is too low, and it is difficult to switch the appropriate heat dissipation mode in a timely manner under different silicone oil temperature conditions, resulting in a mismatch between heat dissipation efficiency and temperature conditions.

[0006] To achieve the objectives outlined in the background section, the present invention employs the following technical solution:

[0007] This invention relates to a silicone oil fan clutch based on fuzzy logic control of the tilt angle of the heat dissipation ribs, comprising a clutch housing 1, heat dissipation ribs 2, track rings 3, driven gear 4, driving gear 5, motor 6, motor mounting plate 7, temperature sensor 8, drive shaft 9, drive disc 10, working chamber 11, and valve plate 12; the inner wall of the clutch housing 1 has a mounting hole, the temperature sensor 8 is fixedly mounted in the mounting hole, the temperature sensor probe extends into the silicone oil in the working chamber 11, the temperature sensor 8 collects the silicone oil temperature signal in real time, and transmits the collected temperature signal to the fuzzy logic control algorithm in real time; The heat dissipation rib 2 is located on the outside of the clutch housing 1, and its angle is adjustable. In the initial state, it is tightly attached to the outer wall of the clutch housing 1, and its bottom is hinged to the clutch housing 1 through the positioning pin 13. The track ring gear transmission group includes a driving gear 5, a driven gear 4, and a track ring 3. The driving gear 5 is coaxially fixed to the output shaft of the motor 6. The driven gear 4 meshes with the driving gear 5 and is also connected to the track ring 3. The heat dissipation rib 2 is linked with the track ring 3. The temperature signal collected by the temperature sensor 8 is used as an input variable. After being processed by the fuzzy logic control algorithm, the output is used to adjust the tilt angle parameter of the heat dissipation rib 2. The control command F drives motor 6 to run; motor 6 outputs tilt angle parameters. The power output from motor 6 is transmitted to track ring 3 via the meshing of drive gear 5 and driven gear 4. Under the guidance of the track constraints of track ring 3, the power drives the cooling rib 2 to change its tilt angle relative to clutch housing 1, thereby adjusting the tilt angle of the cooling rib. The target value of the tilt angle change is equal to the tilt angle parameter. The fanning action is controlled by the control command F. When F is 0, the fanning does not occur, and when F is 1, the fanning occurs, thereby achieving adaptive dynamic control of the heat dissipation efficiency of the silicone oil in the working chamber 11.

[0008] Furthermore, the fuzzy logic control algorithm takes silicone oil temperature T as its input variable and tilt angle parameter as its output variable. With control command F, the tilt angle parameter The basic output ranges from 10° to 80°. The control command F is a Boolean value, where 0 indicates no fanning and 1 indicates fanning. The fuzzy set of the input variable T is divided into four categories: Cold, Ideal, Hot, and Overhot. The fuzzy set Cold represents silicone oil temperature that is too low (below 60°C); the fuzzy set Ideal represents silicone oil temperature that is suitable (greater than or equal to 60°C and less than 80°C); the fuzzy set Hot represents silicone oil temperature that is relatively high (greater than or equal to 80°C and less than 90°C); and the fuzzy set Overhot represents silicone oil temperature that is too high (greater than or equal to 90°C). Trapezoidal membership functions are used to fuzzify the Cold and Overhot fuzzy sets, and triangular membership functions are used to fuzzify the Ideal and Hot fuzzy sets. The output variable... The fuzzy set is simplified by using single-point fuzzy sets; the fuzzy set of the control command F is divided into two categories: NoSwing and Swing, with NoSwing corresponding to F=0 and Swing corresponding to F=1; when Overhot membership degree When, it is determined to be Swing; when When combined with the temperature range, the following criteria are used to determine the appropriate range: the Cold range corresponds to NoSwing; the Ideal and Hot ranges correspond to Swing.

[0009] Furthermore, the temperature signal collected by temperature sensor 8 is used as an input variable, processed by a fuzzy logic control algorithm, and output as a target tilt angle parameter for adjusting the heat dissipation fin 2. The control command F drives motor 6 to run. The specific steps of the fuzzy logic control algorithm are as follows:

[0010] Step 1: Temperature Acquisition and Fuzzy Conversion. Temperature sensor 8 acquires the temperature T(t) of the silicone oil inside the cavity in real time. The membership degree of each fuzzy set is calculated by substituting the temperature into the membership function. The specific formula is as follows:

[0011] Cold trapezoidal membership function:

[0012] ,

[0013] Ideal triangle membership function:

[0014] ,

[0015] Hot triangle membership function:

[0016] ,

[0017] Overhot trapezoidal membership function:

[0018] ,

[0019] Step 2: Fuzzy rule reasoning. Based on the fuzzy membership degree of the input temperature, execute the preset fuzzy rule S1. Fuzzy rule S1 is as follows:

[0020] S11. If T belongs to Cold, then F belongs to Zero (10°), F belongs to NoSwing (0);

[0021] S12. If T belongs to Ideal, then F belongs to Small (30°), F belongs to Swing (1);

[0022] S13. If T belongs to Hot, then It belongs to Medium (60°), and F belongs to Swing (1);

[0023] S14. If T is an Overhot expression, then F belongs to Large (80°), F belongs to Swing (1);

[0024] Calculate the activation degree of each rule. ,in , , , ;

[0025] The aforementioned fuzzy rules and the membership determination logic of control instruction F work together: when Overhot membership... When, Swing(1) is executed first; when When the time comes, the F value is determined according to the aforementioned fuzzy rule S1;

[0026] Step 3: Defuzzification and fan-out judgment, using a weighted average method. The defuzzification is performed using the following formula:

[0027] ,

[0028] Among them, 10, 30, 60, and 80 are the single-point output values ​​corresponding to the Zero, Small, Medium, and Large fuzzy sets, respectively;

[0029] The fan control command F is defuzzified using a weighted average method, as shown in the following formula:

[0030] ,

[0031] ,

[0032] in, The activation level of each rule is calculated, and the result is rounded to 0 or 1.

[0033] When F=0, only the tilt angle parameter is output. When F=1, the output tilt angle parameter Based on this, a high-frequency oscillation control signal is superimposed to drive the heat dissipation fin 2 to fan at a frequency f and an amplitude A, wherein the frequency f and the amplitude A can be determined according to the tilt angle parameter. Adaptive adjustment, the formula is as follows:

[0034] ,

[0035] Among them, minimum amplitude =2°, maximum amplitude =8°, minimum angle =30°, maximum angle =80°;

[0036] The adaptive adjustment formula for frequency f is as follows:

[0037] ,

[0038] Among them, the minimum frequency =3Hz, maximum frequency =8Hz;

[0039] The formula for the oscillation angle is as follows:

[0040] ,

[0041] Where t is time, the sin function achieves periodic oscillation;

[0042] Step 4: Drive control, fuzzy logic algorithm to determine the tilt oscillation angle parameter The signal is transmitted to motor 6, which drives motor 6 to rotate at the corresponding angle. The operation adjusts the tilting and oscillation angle of the heat dissipation fin 2. The formula is as follows:

[0043] ,

[0044] in, For the motor rotation angle, This is the transmission ratio between the motor rotation angle and the tilt angle of the heat dissipation fins;

[0045] The tilt angle of heat dissipation rib 2 is based on the tilt angle parameters. Synchronous adjustment, the fanning state is adaptively switched according to the control command F, realizing dynamic control of the heat dissipation efficiency of silicone oil in the working chamber 11.

[0046] Furthermore, the probe end of the temperature sensor 8 extends into the working chamber 11 to collect the temperature signal of the silicone oil inside the chamber in real time, and transmits the temperature signal to the fuzzy logic control algorithm in real time. After receiving the temperature signal, the fuzzy logic control algorithm judges and outputs the corresponding drive control signal according to different temperature ranges, including the tilt angle parameter θ of the heat dissipation rib and the control command F. The heat dissipation rib 2 is driven to perform the adaptation action through the motor 6 and the track ring gear transmission group. The specific control logic is as follows:

[0047] When the temperature sensor 8 detects that the silicone oil temperature T < 60℃, the fuzzy logic control algorithm determines that the current silicone oil temperature is in the low temperature range and silicone oil insulation should be prioritized. After the algorithm calculates, it outputs a drive control signal: where the tilt angle parameter θ corresponds to the fuzzy subset Zero (the specific value is 10°), and the control command F corresponds to NoSwing (the command code is 0); under the drive of the motor 6 and the track ring gear transmission group, the heat dissipation rib 2 maintains a tilt angle of 10° relative to the clutch housing 1 and does not perform a fanning action to reduce the heat loss of silicone oil and achieve the insulation effect of silicone oil in the working chamber 11;

[0048] When temperature sensor 8 detects a silicone oil temperature of 60℃≤T<80℃, the fuzzy logic control algorithm determines that the current silicone oil temperature is within a suitable range and requires initial heat dissipation. After algorithm calculation, it outputs a drive control signal: where the tilt angle parameter θ corresponds to the fuzzy subset Small (specific value is 30°), and the control command F corresponds to Swing (command code is 1); under the drive of motor 6 and track ring gear transmission group, heat dissipation rib 2 is tilted at a 30° angle relative to clutch housing 1, according to the minimum amplitude and lowest frequency (amplitude). ,frequency The fanning action is performed to achieve low-intensity heat dissipation of the silicone oil in the working chamber 11 by increasing air circulation and active airflow disturbance.

[0049] When temperature sensor 8 detects a silicone oil temperature of 80℃≤T<90℃, the fuzzy logic control algorithm determines that the current silicone oil temperature is in the medium-high temperature range and that heat dissipation efficiency needs to be improved. After algorithm calculation, a drive control signal is output: where the tilt angle parameter θ corresponds to the fuzzy subset Medium (specific value is 60°), and the control command F corresponds to Swing (command code is 1); the heat dissipation rib 2, driven by motor 6 and track ring gear transmission group, tilts at a 60° angle relative to the clutch housing 1, and vibrates at a medium amplitude and medium frequency (amplitude... ,frequency The fan-like action further expands air circulation and active airflow disturbance, achieving medium-intensity heat dissipation of the silicone oil in the working chamber 11;

[0050] When temperature sensor 8 detects that the silicone oil temperature T > 90℃, the fuzzy logic control algorithm determines that the current silicone oil temperature is in the high-temperature overheating range and that heat dissipation efficiency needs to be maximized. After algorithm calculation, the drive control signal is output: where the tilt angle parameter θ corresponds to the fuzzy subset Large (specific value is 80°), and the control command F corresponds to Swing (command code is 1); under the drive of motor 6 and track ring gear transmission group, the heat dissipation rib 2 is tilted at an 80° angle relative to the clutch housing 1, and according to the maximum amplitude and highest frequency (amplitude) ,frequency The fan-like action is performed to achieve high-intensity heat dissipation of the silicone oil in the working chamber 11 by maximizing the synergistic effect of air circulation and active airflow disturbance.

[0051] Furthermore, in the silicone oil fan clutch of the present invention based on fuzzy logic control of the tilt angle of the heat dissipation rib, the fuzzy logic control algorithm is not set independently, but integrated into the electronic control unit (ECU). This simplifies the overall structure, reduces the installation space occupied, and improves the control response speed. The detection end of the temperature sensor 8 extends into the working chamber to collect the silicone oil temperature in real time and convert it into an electrical signal. This temperature signal is transmitted to the fuzzy logic control algorithm in the ECU through a signal line. The fuzzy logic control algorithm has a built-in preset fuzzy control rule table. Taking the temperature signal as the input variable, after fuzzification, rule reasoning, and defuzzification, it synchronously outputs two core signals: one is used to define the tilt angle parameter θ of the heat dissipation rib 2, and the other is used to drive the heat dissipation rib to achieve the fanning action. The ECU sends the tilt angle parameter θ and the control command F to the motor 6. After receiving them, the motor 6 outputs the corresponding speed and direction of power according to the requirement of the target tilt angle parameter θ, and drives the heat dissipation rib to achieve the target tilt angle through the track ring gear transmission group. At the same time, it switches the fanning state according to the control command F (fanning action is performed when F=1, and no fanning when F=0).

[0052] Furthermore, in the silicone oil fan clutch of the present invention, which controls the tilt angle of the heat dissipation ribs based on fuzzy logic, the power output by the motor 6 is transmitted through the meshing of the driving gear 5 and the driven gear 4, driving the track ring 3 to rotate coaxially relative to the clutch housing 1. The track ring 3 forms circumferential constraints and guides on the sliders of each heat dissipation rib 2 through the annular groove, driving all heat dissipation ribs 2 to rotate synchronously around their respective positioning pins 13 axes, thereby achieving precise switching of the tilt angle of the heat dissipation ribs 2 relative to the clutch housing 1. The heat dissipation ribs 2 have four dynamically switchable working states: a. 10° tilt with no fanning and low heat dissipation; b. 30° tilt with minimum amplitude and lowest frequency fanning and low-intensity heat dissipation; c. 60° tilt with medium amplitude and medium frequency fanning and medium-intensity heat dissipation; d. 80° tilt with maximum amplitude and highest frequency fanning and high-intensity heat dissipation. Based on different temperature conditions, the heat dissipation ribs 2 can adaptively switch between the four states a to d, precisely adapting to the real-time heat dissipation requirements of the silicone oil in the working chamber 11.

[0053] The beneficial effects of this invention are as follows: By collecting the temperature signal of the silicone oil in the working chamber in real time through a temperature sensor, and processing the temperature signal using a fuzzy logic control algorithm, the tilt angle of the heat dissipation fins relative to the clutch housing and the dynamic fanning state are adaptively adjusted to achieve precise dynamic adaptation of heat dissipation efficiency to the current temperature conditions. This allows for precise control of the silicone oil temperature in the working chamber. This dynamic control method can effectively avoid engine power loss caused by excessive heat dissipation of silicone oil under low-temperature conditions, and solve the problem of reduced coupling torque of the silicone oil fan clutch caused by insufficient heat dissipation of silicone oil under high-temperature conditions. This significantly enhances the operational stability of the silicone oil fan clutch and improves the operational reliability of the engine cooling system. It not only meets the long-term high-load operation requirements of agricultural machinery, but also extends the service life of the engine by improving the stability of the cooling system. Attached Figure Description

[0054] Figure 1 This is an assembly diagram of a silicone oil fan clutch based on fuzzy logic control of the tilt angle of the heat dissipation ribs according to the present invention.

[0055] Figure 2 This is an assembly diagram of the trajectory ring gear transmission assembly of a silicone oil fan clutch based on fuzzy logic control of the tilt angle of the heat dissipation ribs according to the present invention.

[0056] Figure 3 This is a cross-sectional view of a silicone oil fan clutch based on fuzzy logic control of the tilt angle of the heat dissipation ribs according to the present invention.

[0057] Figure 4 This is a schematic diagram of the trajectory loop of a silicone oil fan clutch based on fuzzy logic control of the tilt angle of the heat dissipation ribs according to the present invention.

[0058] Figure 5This is a schematic diagram of the motor gear of a silicone oil fan clutch based on fuzzy logic control of the tilt angle of the heat dissipation ribs according to the present invention.

[0059] In the diagram: 1-clutch housing, 2-angle adjustable heat dissipation rib, 3-track ring, 4-driven gear, 5-drive gear, 6-motor, 7-motor mounting plate, 8-temperature sensor, 9-drive shaft, 10-drive disc, 11-working chamber, 12-valve plate, 13-positioning pin. Detailed Implementation

[0060] The technical solutions of the present invention will be described in detail below with reference to the accompanying drawings of the embodiments. It should be particularly noted that the embodiments are only some examples of the present invention and do not cover all situations. Within the scope of the present invention, those skilled in the art can design other implementations based on the technical content of the present invention without creative effort, and these also fall within the protection scope of the present invention.

[0061] In this embodiment, refer to Figures 1 to 5 A silicone oil fan clutch based on fuzzy logic control of the tilt angle of the heat dissipation ribs includes a clutch housing 1, heat dissipation ribs 2, a track ring 3, a driven gear 4, a driving gear 5, a motor 6, a motor mounting plate 7, a temperature sensor 8, a drive shaft 9, a drive disc 10, a working chamber 11, and a valve plate 12. The inner wall of the clutch housing 1 has mounting holes, and the temperature sensor 8 is fixedly mounted in the mounting holes. The temperature sensor probe extends into the silicone oil in the working chamber 11. The temperature sensor 8 collects the silicone oil temperature signal in real time and transmits the collected temperature signal to the fuzzy logic control algorithm in real time. Rib 2 is located on the outside of clutch housing 1, with an adjustable angle. In its initial state, it is tightly attached to the outer wall of clutch housing 1, and its bottom is hinged to clutch housing 1 via positioning pin 13. The track ring gear transmission assembly includes a driving gear 5, a driven gear 4, and a track ring 3. The driving gear 5 is coaxially fixed to the output shaft of motor 6. The driven gear 4 meshes with the driving gear 5 and is also connected to the track ring 3. The heat dissipation rib 2 is linked with the track ring 3. The temperature signal collected by temperature sensor 8 is used as an input variable, processed by a fuzzy logic control algorithm, and outputs a parameter for adjusting the tilt angle of heat dissipation rib 2. The control command F drives motor 6 to run; motor 6 outputs tilt angle parameters. The power output from motor 6 is transmitted to track ring 3 via the meshing of drive gear 5 and driven gear 4. Under the guidance of the track constraints of track ring 3, the power drives the cooling rib 2 to change its tilt angle relative to clutch housing 1, thereby adjusting the tilt angle of the cooling rib. The target value of the tilt angle change is equal to the tilt angle parameter. The fanning action is controlled by the control command F (no fanning when F=0, fanning when F=1), thereby realizing adaptive dynamic control of the heat dissipation efficiency of the silicone oil in the working chamber 11.

[0062] Furthermore, the fuzzy logic control algorithm takes silicone oil temperature T as its input variable and tilt angle parameter as its output variable. (Basic output, value range 10° to 80°) and control command F (Boolean value, 0 indicates no fanning, 1 indicates fanning); the fuzzy set of input variable T is divided into four categories: Cold (T<60℃), Ideal (60℃≤T<80℃), Hot (80℃≤T<90℃), and Overhot (T≥90℃). Trapezoidal membership functions are used to fuzzify the Cold (T<60℃) and Overhot (T≥90℃) fuzzy sets, and triangular membership functions are used to fuzzify the Ideal (60℃≤T<80℃) and Hot (80℃≤T<90℃) fuzzy sets. Output variable... The fuzzy set is simplified by using a single-point fuzzy set; the fuzzy set of the control command F is divided into two categories: NoSwing(0) and Swing(1): when the membership degree of overheating is... When, it is determined to be Swing(1); when When the temperature range is determined (Cold range is NoSwing(0), Ideal and Hot ranges are Swing(1)).

[0063] Furthermore, the temperature signal collected by temperature sensor 8 is used as an input variable, processed by a fuzzy logic control algorithm, and output as a target tilt angle parameter for adjusting the heat dissipation fin 2. The control command F drives motor 6 to run. The specific steps of the fuzzy logic control algorithm are as follows:

[0064] Step 1: Temperature Acquisition and Fuzzy Conversion. Temperature sensor 8 acquires the temperature T(t) of the silicone oil inside the cavity in real time. The membership degree of each fuzzy set is calculated by substituting the temperature into the membership function. The specific formula is as follows:

[0065] Trapezoidal membership function for cold (T<60℃):

[0066] ,

[0067] Ideal (60℃≤T<80℃) Triangle Membership Function:

[0068] ,

[0069] Hot (80℃≤T<90℃) triangle membership function:

[0070] ,

[0071] Overhot (T≥90℃) trapezoidal membership function:

[0072] ,

[0073] Step 2: Fuzzy rule reasoning. Based on the fuzzy membership degree of the input temperature, execute the preset fuzzy rule S1, which is as follows:

[0074] S11. If T belongs to Cold, then F belongs to Zero (10°), F belongs to NoSwing (0);

[0075] S12. If T belongs to Ideal, then F belongs to Small (30°), F belongs to Swing (1);

[0076] S13. If T belongs to Hot, then It belongs to Medium (60°), and F belongs to Swing (1);

[0077] S14. If T is an Overhot expression, then F belongs to Large (80°), F belongs to Swing (1);

[0078] Calculate the activation degree of each rule. ,in , , , ;

[0079] The aforementioned fuzzy rules and the membership determination logic of control instruction F work together: when Overhot membership... When, Swing(1) is executed first; when When the time comes, determine the F value according to rule S1 above;

[0080] Step 3: Defuzzification and fan-out judgment, using a weighted average method. The defuzzification is performed using the following formula:

[0081] ,

[0082] Among them, 10, 30, 60, and 80 are the single-point output values ​​corresponding to the Zero, Small, Medium, and Large fuzzy sets, respectively;

[0083] The fan control command F is defuzzified using a weighted average method, as shown in the following formula:

[0084] ,

[0085] ,

[0086] in, The activation level of each rule is calculated, and the result is rounded to 0 or 1.

[0087] When F=0, only the tilt angle parameter is output. When F=1, the output tilt angle parameter Based on this, a high-frequency oscillation control signal is superimposed to drive the heat dissipation fin 2 to fan at a frequency f and an amplitude A, wherein the frequency f and the amplitude A can be determined according to the tilt angle parameter. Adaptive adjustment, the formula is as follows:

[0088] ,

[0089] Among them, minimum amplitude =2°, maximum amplitude =8°, minimum angle =30°, maximum angle =80°;

[0090] The adaptive adjustment formula for frequency f is as follows:

[0091] ,

[0092] Among them, the minimum frequency =3Hz, maximum frequency =8Hz;

[0093] The formula for the oscillation angle is as follows:

[0094] ,

[0095] Where t is time, the sin function achieves periodic oscillation;

[0096] Step 4: Drive control, fuzzy logic algorithm to determine the tilt oscillation angle parameter The signal is transmitted to motor 6, which drives motor 6 to rotate at the corresponding angle. The operation adjusts the tilting and oscillation angle of the heat dissipation fin 2. The formula is as follows:

[0097] ,

[0098] in, For the motor rotation angle, This is the transmission ratio between the motor rotation angle and the tilt angle of the heat dissipation fins;

[0099] The tilt angle of heat dissipation rib 2 is based on the tilt angle parameters. Synchronous adjustment, the fanning state is adaptively switched according to the control command F, realizing dynamic control of the heat dissipation efficiency of silicone oil in the working chamber 11.

[0100] Furthermore, the probe end of the temperature sensor 8 extends into the working chamber 11 to collect the temperature signal of the silicone oil inside the chamber in real time, and transmits the temperature signal to the fuzzy logic control algorithm in real time. After receiving the temperature signal, the fuzzy logic control algorithm determines the appropriate drive control signal (including the tilt angle parameter θ of the heat sink rib and the control command F) according to different temperature ranges. The heat sink rib 2 is then driven to perform the adaptation action through the motor 6 and the track ring gear transmission group. The specific control logic is as follows:

[0101] When the temperature sensor 8 detects that the silicone oil temperature T < 60℃, the fuzzy logic control algorithm determines that the current silicone oil temperature is in the low temperature range and silicone oil insulation should be prioritized. After the algorithm calculates, it outputs a drive control signal: where the tilt angle parameter θ corresponds to the fuzzy subset Zero (the specific value is 10°), and the control command F corresponds to NoSwing (the command code is 0); under the drive of the motor 6 and the track ring gear transmission group, the heat dissipation rib 2 maintains a tilt angle of 10° relative to the clutch housing 1 and does not perform a fanning action to reduce the heat loss of silicone oil and achieve the insulation effect of silicone oil in the working chamber 11;

[0102] When temperature sensor 8 detects a silicone oil temperature of 60℃≤T<80℃, the fuzzy logic control algorithm determines that the current silicone oil temperature is within a suitable range and requires initial heat dissipation. After algorithm calculation, it outputs a drive control signal: where the tilt angle parameter θ corresponds to the fuzzy subset Small (specific value is 30°), and the control command F corresponds to Swing (command code is 1); under the drive of motor 6 and track ring gear transmission group, the heat dissipation rib 2 is tilted at a 30° angle relative to the clutch housing 1, and according to the minimum amplitude Lowest frequency Performing a fanning action, low-intensity heat dissipation of the silicone oil in the working chamber 11 is achieved by increasing air circulation and active airflow disturbance;

[0103] When temperature sensor 8 detects a silicone oil temperature of 80℃≤T<90℃, the fuzzy logic control algorithm determines that the current silicone oil temperature is in the medium-high temperature range and that heat dissipation efficiency needs to be improved. After algorithm calculation, a drive control signal is output: where the tilt angle parameter θ corresponds to the fuzzy subset Medium (specific value is 60°), and the control command F corresponds to Swing (command code is 1); under the drive of motor 6 and track ring gear transmission group, the heat dissipation rib 2 is tilted at a 60° angle relative to the clutch housing 1, and according to the amplitude ,frequency Performing a fanning action further expands air circulation and active airflow disturbance, achieving medium-intensity heat dissipation of the silicone oil in the working chamber 11;

[0104] When temperature sensor 8 detects that the silicone oil temperature T ≥ 90℃, the fuzzy logic control algorithm determines that the current silicone oil temperature is in the high-temperature overheating range and that heat dissipation efficiency needs to be maximized. After algorithm calculation, the drive control signal is output: where the tilt angle parameter θ corresponds to the fuzzy subset Large (specific value is 80°), and the control command F corresponds to Swing (command code is 1); under the drive of motor 6 and track ring gear transmission group, the heat dissipation rib 2 is tilted at an 80° angle relative to the clutch housing 1, and according to the maximum amplitude highest frequency By performing a fanning action, high-intensity heat dissipation of the silicone oil in the working chamber 11 is achieved through the synergistic effect of maximizing airflow and active airflow disturbance.

[0105] Furthermore, in the silicone oil fan clutch of the present invention based on fuzzy logic control of the tilt angle of the heat dissipation rib, the fuzzy logic control algorithm is not set independently, but integrated into the electronic control unit (ECU). This simplifies the overall structure, reduces the installation space occupied, and improves the control response speed. The detection end of the temperature sensor 8 extends into the working chamber to collect the silicone oil temperature in real time and convert it into an electrical signal. This temperature signal is transmitted to the fuzzy logic control algorithm in the ECU through a signal line. The fuzzy logic control algorithm has a built-in preset fuzzy control rule table. Taking the temperature signal as the input variable, after fuzzification, rule reasoning, and defuzzification, it synchronously outputs two core signals: one is the tilt angle parameter θ for defining the heat dissipation rib 2, and the other is the control command F for driving the heat dissipation rib to achieve the fanning action. The ECU sends the tilt angle parameter θ and the control command F to the motor 6. After receiving the motor 6, it outputs the corresponding speed and direction of power according to the requirement of the target tilt angle parameter θ, drives the heat dissipation rib to achieve the target tilt angle through the track ring gear transmission group, and switches the fanning state according to the control command F (fanning action is performed when F=1, and no fanning when F=0).

[0106] In summary, in the silicone oil fan clutch of the present invention, which controls the tilt angle of the heat dissipation ribs based on fuzzy logic, the power output by the motor 6 is transmitted through the meshing of the driving gear 5 and the driven gear 4, driving the track ring 3 to rotate coaxially relative to the clutch housing 1. The track ring 3 forms circumferential constraints and guides on the sliders of each heat dissipation rib 2 through the annular groove, driving all heat dissipation ribs 2 to rotate synchronously around their respective positioning pins 13 axes, thereby achieving precise switching of the tilt angle of the heat dissipation ribs 2 relative to the clutch housing 1. The working states of the heat dissipation ribs 2 are divided into four categories: the first category is a low-heat dissipation state with no fanning at a tilt of 10°; the second category is a low-intensity heat dissipation state with fanning at the minimum amplitude and lowest frequency at a tilt of 30°; the third category is a medium-intensity heat dissipation state with fanning at the medium amplitude and medium frequency at a tilt of 60°; and the fourth category is a high-intensity heat dissipation state with fanning at the maximum amplitude and highest frequency at a tilt of 80°. Based on different temperature conditions, the heat dissipation ribs 2 can achieve dynamic adaptive adjustment between the above four states to adapt to the real-time heat dissipation requirements of the silicone oil in the working chamber 11.

[0107] This invention is not limited to the specific details of the exemplary embodiments described above. Other forms may be used to implement this invention without departing from its core ideas or essential characteristics. Therefore, these embodiments are merely examples and not intended to limit the scope of the invention. The scope of this invention is defined by the appended claims and covers all modifications falling within the equivalent scope of the claims.

[0108] Furthermore, although this specification describes embodiments, not every embodiment corresponds to only one independent technical solution. This descriptive method is merely for clarity, and those skilled in the art should consider the specification as a whole, combining it with the technical solutions in each embodiment to form other understandable implementation methods.

Claims

1. A silicone oil fan clutch based on fuzzy logic to control the tilt angle of the heat dissipation fins, characterized in that, The system includes a clutch housing (1), a heat dissipation rib (2), a track ring (3), a driven gear (4), a driving gear (5), a motor (6), a motor mounting plate (7), a temperature sensor (8), a drive shaft (9), a drive disc (10), a working chamber (11), and a valve plate (12). The inner wall of the clutch housing (1) has mounting holes, and the temperature sensor (8) is fixedly mounted in these holes. The temperature sensor probe extends into the silicone oil within the working chamber (11). The temperature sensor (8) collects the silicone oil temperature signal in real time and transmits the collected temperature signal to the fuzzy logic control algorithm in real time. The heat dissipation rib (2) is located on the clutch housing (1). On the outside, the angle is adjustable. In the initial state, it is tightly attached to the outer wall of the clutch housing (1). Its bottom is hinged to the clutch housing (1) by a positioning pin (13). The track ring gear transmission group includes a driving gear (5), a driven gear (4), and a track ring (3). The driving gear (5) is coaxially fixed to the output shaft of the motor (6). The driven gear (4) meshes with the driving gear (5) and is connected to the track ring (3). The heat dissipation rib (2) is linked with the track ring (3). The temperature signal collected by the temperature sensor (8) is used as an input variable. After being processed by the fuzzy logic control algorithm, the output is used to adjust the tilt angle parameter of the heat dissipation rib (2). The control command F drives the motor (6) to run; the output of the motor (6) is related to the tilt angle parameter. The power output of the motor (6) is transmitted to the track ring (3) through the meshing transmission of the driving gear (5) and the driven gear (4), and under the guidance of the track ring (3), the heat dissipation rib (2) is driven to produce a change in tilt angle relative to the clutch housing (1), thereby adjusting the tilt angle of the heat dissipation rib; the target value of the tilt angle change is equal to the tilt angle parameter. The fanning action is controlled by the control command F. When F is 0, the fanning does not occur; when F is 1, the fanning occurs, thereby realizing the adaptive dynamic control of the heat dissipation efficiency of the silicone oil in the working cavity (11).

2. A silicone oil fan clutch based on fuzzy logic control of the tilt angle of the heat dissipation fins according to claim 1, characterized in that, The fuzzy logic control algorithm takes silicone oil temperature T as its input variable and outputs tilt angle parameters as its output variables. With control command F, the tilt angle parameter The basic output ranges from 10° to 80°. The control command F is a Boolean value, where 0 indicates no fanning and 1 indicates fanning. The fuzzy set of the input variable T is divided into four categories: Cold, Ideal, Hot, and Overhot. The fuzzy set Cold represents silicone oil temperature that is too low (below 60°C); the fuzzy set Ideal represents silicone oil temperature that is suitable (greater than or equal to 60°C and less than 80°C); the fuzzy set Hot represents silicone oil temperature that is relatively high (greater than or equal to 80°C and less than 90°C); and the fuzzy set Overhot represents silicone oil temperature that is too high (greater than or equal to 90°C). Trapezoidal membership functions are used to fuzzify the Cold and Overhot fuzzy sets, and triangular membership functions are used to fuzzify the Ideal and Hot fuzzy sets. The output variable... The fuzzy set is simplified by using single-point fuzzy sets; the fuzzy set of the control command F is divided into two categories: NoSwing and Swing, with NoSwing corresponding to F=0 and Swing corresponding to F=1; when Overhot membership degree When, it is determined to be Swing; when When combined with the temperature range, the following criteria are used to determine the appropriate range: the Cold range corresponds to NoSwing; the Ideal and Hot ranges correspond to Swing.

3. The silicone oil fan clutch based on fuzzy logic control of the tilt angle of the heat dissipation fins according to claim 1, characterized in that: The temperature signal collected by the temperature sensor (8) is used as an input variable. After being processed by a fuzzy logic control algorithm, the output is a target tilt angle parameter used to adjust the heat dissipation rib (2). The control command F drives the motor (6) to run. The specific steps of the fuzzy logic control algorithm are as follows: Step 1: Temperature acquisition and fuzzification. The temperature sensor (8) acquires the temperature T(t) of the silicone oil in the cavity in real time, and substitutes it into the membership function to calculate the membership degree of each fuzzy set. The specific formula is as follows: Cold trapezoidal membership function: ， Ideal triangle membership function: ， Hot triangle membership function: ， Overhot trapezoidal membership function: ， Step 2: Fuzzy rule reasoning. Based on the fuzzy membership degree of the input temperature, execute the preset fuzzy rule S1, which is as follows: S11. If T belongs to Cold, then It belongs to Zero, corresponding to 10°; F belongs to NoSwing, corresponding to 0. S12. If T belongs to Ideal, then It belongs to Small, corresponding to 30°; F belongs to Swing, corresponding to 1. S13. If T belongs to Hot, then It belongs to Medium, corresponding to 60°; F belongs to Swing, corresponding to 1. S14. If T is an Overhot expression, then F belongs to Large, corresponding to 80°; F belongs to Swing, corresponding to 1. Calculate the activation degree of each rule. ,in , , , The aforementioned fuzzy rule S1 works in conjunction with the membership determination logic of the control instruction F; Step 3: Defuzzification and fan-out judgment, using a weighted average method. The defuzzification is performed using the following formula: ， Among them, 10, 30, 60, and 80 are the single-point output values ​​corresponding to the Zero, Small, Medium, and Large fuzzy sets, respectively; The fan control command F is defuzzified using a weighted average method, as shown in the following formula: ， ， in, The activation level of each rule is calculated, and the result is rounded to 0 or 1. When F=0, only the tilt angle parameter is output. When F=1, the output tilt angle parameter Based on this, a high-frequency oscillation control signal is superimposed to drive the heat dissipation fins (2) to fan at a frequency f and an amplitude A, wherein the frequency f and the amplitude A can be determined according to the tilt angle parameter. Adaptive adjustment, the formula is as follows: ， Among them, minimum amplitude =2°, maximum amplitude =8°, minimum angle =30°, maximum angle =80°; The adaptive adjustment formula for frequency f is as follows: ， Among them, the minimum frequency =3Hz, maximum frequency =8Hz; The formula for the oscillation angle is as follows: ， Where t is time, the sin function achieves periodic oscillation; Step 4: Drive control, fuzzy logic algorithm to determine the tilt oscillation angle parameter The signal is transmitted to the motor (6), which drives the motor (6) at the corresponding rotation angle. Operation, adjusting the tilting oscillation angle of the heat dissipation fins (2) The formula is as follows: ， in, For the motor rotation angle, This is the transmission ratio between the motor rotation angle and the tilt angle of the heat dissipation fins; The tilt angle of the heat dissipation rib (2) is according to the tilt angle parameter. Synchronous adjustment, the fanning state is adaptively switched according to the control command F, so as to realize the dynamic control of the heat dissipation efficiency of the silicone oil in the working chamber (11).

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