Self-adaptive control method for maintaining response rate of electronic water valve of vehicle, controller and vehicle

Abstract

The invention provides a self-adaptive control method for maintaining the response rate of an electronic water valve of a vehicle, a controller and the vehicle, which are used for adapting to the performance change of the electronic water valve and continuously maintaining the optimal response rate of the electronic water valve on the premise of not depending on hardware upgrading. The self-adaptive control method comprises the steps that in the operation process of the electronic water valve, the real-time PWM duty ratio of a driving motor for driving the electronic water valve to work and operation environment parameters and performance feedback parameters of the electronic water valve are obtained; determining a real-time performance attenuation coefficient of the electronic water valve in combination with the real-time PWM duty ratio, the operating environment parameters and the performance feedback parameters; and if the real-time performance attenuation coefficient is larger than a first preset threshold value but does not exceed a second preset threshold value, the PWM duty ratio of the driving motor is adjusted in a self-adaptive mode so as to compensate performance attenuation of the electronic water valve.

Description

Technical Field

[0001] This application relates to the field of automotive thermal management technology, specifically to an adaptive control method, controller, and vehicle for maintaining the response rate of a vehicle's electronic water valve. Background Technology

[0002] Electronic water valves are key actuators in modern automotive thermal management systems. Their response rate directly determines the speed of coolant flow regulation and the control precision and efficiency of the entire thermal management system. Response delays can lead to engine overheating or overcooling, affecting fuel economy and emissions; for new energy vehicles, they directly impact battery life and fast-charging performance.

[0003] Currently, the mainstream methods for improving the response rate of electronic water valves mainly focus on the hardware level, such as using motors with higher torque and optimizing the valve body structure and flow channels to reduce fluid resistance. However, these methods significantly increase manufacturing costs and design complexity. Furthermore, during long-term use, electronic water valves experience performance degradation due to wear, coolant impurity deposition, and component aging, resulting in a gradual decrease in response rate. This chronic performance decline cannot be resolved through hardware improvements.

[0004] Therefore, there is an urgent need for an intelligent control method that does not rely on hardware upgrades, can adapt to changes in water valve performance, and can continuously maintain its optimal response rate. Summary of the Invention

[0005] This application provides an adaptive control method, controller, and vehicle for maintaining the response rate of a vehicle's electronic water valve, which can adapt to performance changes of the electronic water valve and continuously maintain the optimal response rate of the electronic water valve without relying on hardware upgrades.

[0006] The technical solution of this invention is as follows:

[0007] In a first aspect, this application provides an adaptive control method for maintaining the response rate of a vehicle's electronic water valve, comprising:

[0008] During the operation of the electronic water valve, the real-time PWM duty cycle of the drive motor that drives the electronic water valve, the operating environment parameters of the electronic water valve, and the performance feedback parameters are acquired.

[0009] The real-time performance attenuation coefficient of the electronic water valve is determined by combining the real-time PWM duty cycle, operating environment parameters, and performance feedback parameters.

[0010] If the real-time performance degradation coefficient is greater than the first preset threshold but not greater than the second preset threshold, the PWM duty cycle of the drive motor is adaptively adjusted to compensate for the performance degradation of the electronic water valve.

[0011] Furthermore, the method also includes:

[0012] Based on the real-time performance attenuation coefficient and the real-time PWM duty cycle, the degree of failure of the electronic water valve is determined, and a corresponding level of fault warning is output based on the degree of failure of the electronic water valve.

[0013] Furthermore, the operating environment parameters include: coolant temperature, system pressure of the cooling system, and power supply voltage of the electronic water valve; the performance feedback parameters include: the sequence of the most recent operating mode switching completed by the electronic water valve, and the real-time response time required for the most recent operating mode switching; the step of determining the real-time performance degradation coefficient of the electronic water valve by combining the real-time PWM duty cycle, the operating environment parameters, and the performance feedback parameters includes:

[0014] Based on the most recent working mode switching sequence of the electronic water valve, determine the baseline response time required to complete the working mode switching sequence.

[0015] The environmental compensation factor is determined based on the coolant temperature, the system pressure of the cooling system, and the power supply voltage of the electronic water valve.

[0016] The real-time performance degradation coefficient is determined based on the real-time response time, the baseline response time, and the environmental compensation factor.

[0017] Furthermore,

[0018] Based on the first correspondence table of pre-defined working mode switching sequence and baseline response time, the baseline response time required to complete the working mode switching sequence is determined by looking up the table.

[0019] Furthermore, based on the pre-calibrated second correspondence table between coolant temperature, cooling system pressure, and power supply voltage of electronic water valve and environmental compensation factor, the environmental compensation factor corresponding to the coolant temperature, cooling system pressure, and power supply voltage of electronic water valve is determined by referring to the table.

[0020] Furthermore, the step of adaptively adjusting the PWM duty cycle of the drive motor to compensate for the performance degradation of the electronic water valve includes:

[0021] The PWM duty cycle compensation value is determined based on the real-time performance attenuation coefficient.

[0022] Based on the PWM duty cycle compensation value, the PWM duty cycle of the drive motor is adaptively adjusted.

[0023] Furthermore, the steps of determining the fault degree of the electronic water valve based on the real-time performance degradation coefficient and the real-time PWM duty cycle, and outputting a corresponding level of fault warning based on the fault degree of the electronic water valve, include:

[0024] If the real-time performance degradation coefficient is greater than the first preset threshold but not the second preset threshold, and the real-time PWM duty cycle has reached its preset upper limit, then the electronic water valve is determined to have a minor fault, and a primary fault warning of minor performance degradation of the electronic water valve is reported.

[0025] If the real-time performance degradation coefficient exceeds the second preset threshold but the real-time PWM duty cycle does not reach its preset upper limit, then the electronic water valve is determined to have a moderate fault, and a medium-level fault warning of moderate performance degradation of the electronic water valve is reported.

[0026] If the real-time performance degradation coefficient exceeds the second preset threshold and the real-time PWM duty cycle has reached its preset upper limit, then the electronic water valve is determined to have a serious fault, and an advanced fault warning for the electronic water valve is reported.

[0027] Secondly, this application also provides a controller, including:

[0028] The parameter acquisition module is used to acquire the real-time PWM duty cycle of the drive motor that drives the electronic water valve, the operating environment parameters of the electronic water valve, and the performance feedback parameters during the operation of the electronic water valve.

[0029] The attenuation coefficient determination module is used to determine the real-time performance attenuation coefficient of the electronic water valve by combining the real-time PWM duty cycle, the operating environment parameters, and the performance feedback parameters.

[0030] An adaptive control module is used to adaptively adjust the PWM duty cycle of the drive motor to compensate for the performance degradation of the electronic water valve if the real-time performance degradation coefficient is greater than a first preset threshold but not greater than a second preset threshold.

[0031] Furthermore, the adaptive control device also includes:

[0032] The fault warning module is used to determine the fault degree of the electronic water valve based on the real-time performance attenuation coefficient and the real-time PWM duty cycle, and output a corresponding level of fault warning based on the fault degree of the electronic water valve.

[0033] Thirdly, this application also provides a vehicle including the aforementioned controller.

[0034] The beneficial effects of this invention are as follows:

[0035] By monitoring the operating status of the electronic water valve in real time, it can automatically maintain its optimal responsiveness even when its performance naturally degrades due to long-term use. The controller calculates a real-time performance degradation coefficient that accurately reflects the electronic water valve's performance status by comparing the real-time response time required for the electronic water valve to switch between different operating modes most recently with the baseline response time corrected for environmental compensation factors. This real-time performance degradation coefficient effectively eliminates the influence of external environmental fluctuations such as coolant temperature, system pressure, and power supply voltage, directly revealing the performance degradation caused by irreversible factors such as internal mechanical wear of the valve body and motor aging.

[0036] When performance degradation of the electronic water valve is detected, the controller does not change the original hardware. Instead, it dynamically adjusts the PWM duty cycle signal output to the drive motor based on the real-time performance degradation coefficient. This compensates for the increase in mechanical resistance by enhancing the electric drive force, thereby restoring the valve core's movement speed to the expected level. The entire process is managed based on preset performance thresholds, enabling proactive intervention in the early stages of performance degradation to extend service life, and providing timely warnings before severe failure, ensuring that the electronic water valve maintains stable and rapid response characteristics throughout its entire lifespan. Attached Figure Description

[0037] Figure 1 This is a structural block diagram of the vehicle in the embodiments of this application;

[0038] Figure 2 This is a flowchart illustrating the adaptive control method for maintaining the response rate of the vehicle's electronic water valve in an embodiment of this application. Detailed Implementation

[0039] Reference Figure 1 This application provides a vehicle 100, including an environmental perception system 11, a controller 12, and an actuator 13.

[0040] The environmental sensing system 11 includes a temperature sensor 111, a pressure sensor 112, and a power supply voltage monitoring circuit 113. The temperature sensor 111 is used to monitor the temperature of the coolant in the cooling circuit where the electronic water valve 131 is located in real time; the pressure sensor 112 is used to measure the coolant pressure difference (i.e., system pressure) between the inlet and outlet of the electronic water valve 131 in real time; and the power supply voltage monitoring circuit 113 is used to accurately acquire the operating voltage of the drive motor 132 supplied to the electronic water valve 131.

[0041] The core component of actuator 13 is electronic water valve 131 and its drive mechanism, specifically including electronic water valve 131 and its drive motor 132. Drive motor 132 receives PWM (Pulse Width Modulation) control signals from controller 12. Depending on the PWM signal, drive motor 132 outputs corresponding torque and speed, which drives the valve core of electronic water valve 131 to move to the target position (i.e., target angle) through mechanical transmission mechanisms (such as gears, screws, etc.).

[0042] For the corresponding controller 12, the actual opening degree of the valve core or the rotation position of the drive motor 132 is detected in real time by the position sensor, and this position signal is fed back to the controller 12.

[0043] Reference Figure 1 In this embodiment of the application, the controller 12 specifically includes:

[0044] The parameter acquisition module 121 is used to acquire the real-time PWM duty cycle of the drive motor 132 that drives the electronic water valve 131, the operating environment parameters of the electronic water valve 131, and the performance feedback parameters during the operation of the electronic water valve 131.

[0045] The attenuation coefficient determination module 122 is used to determine the real-time performance attenuation coefficient of the electronic water valve 131 by combining the real-time PWM duty cycle, the operating environment parameters, and the performance feedback parameters.

[0046] The adaptive control module 123 is used to adaptively adjust the PWM duty cycle of the drive motor 132 to compensate for the performance degradation of the electronic water valve 131 when the real-time performance degradation coefficient is greater than a first preset threshold but not greater than a second preset threshold, indicating that the response rate of the electronic water valve 131 has slowed down.

[0047] The fault warning module 124 is used to determine the fault degree of the electronic water valve 131 based on the real-time performance attenuation coefficient and the real-time PWM duty cycle, and output a corresponding level of fault warning based on the fault degree of the electronic water valve 131.

[0048] The parameter acquisition module 121 obtains the real-time PWM duty cycle by reading the PWM control command output from the adaptive control module 123 to the drive motor 132. Furthermore, the environmental sensing system 11 collects the operating environment parameters of the electronic water valve 131. In this embodiment, the operating environment parameters of the electronic water valve 131 include: coolant temperature, cooling system pressure, and power supply voltage of the electronic water valve 131. These parameters are obtained by detecting the cooling temperature, cooling system pressure, and power supply voltage of the electronic water valve 131 using the aforementioned temperature sensor 111, pressure sensor 112, and power supply voltage monitoring circuit 113.

[0049] In this embodiment, the performance response parameters of the electronic water valve 131 include the sequence of the most recent working mode switching completed by the electronic water valve 131, and the real-time response time required for the most recent working mode switching.

[0050] In this embodiment of the application, the process performed by the attenuation coefficient determination module 122 includes:

[0051] Based on the most recent working mode switching sequence of the electronic water valve 131, determine the baseline response time required to complete the working mode switching sequence.

[0052] The environmental compensation factor is determined based on the coolant temperature, the system pressure of the cooling system, and the power supply voltage of the electronic water valve 131.

[0053] The real-time performance degradation coefficient is determined based on the real-time response time, the baseline response time, and the environmental compensation factor.

[0054] Based on the first correspondence table of pre-defined working mode switching sequence and baseline response time, the baseline response time required to complete the working mode switching sequence is determined by looking up the table.

[0055] The process of establishing the first correspondence table is as follows: During the factory calibration stage of the electronic water valve 131, parameters such as the reference PWM duty cycle, reference coolant temperature, reference system pressure, and reference power supply voltage of the drive motor 132 are given in a controlled experimental environment (e.g., PWM duty cycle: 50%, coolant temperature: 20°C; system pressure: 0.5 bar, power supply voltage of electronic water valve 131: 13.5V). The reference response time required for the electronic water valve 131 to switch between various working modes is measured, thereby establishing a mapping relationship database between the switching sequence of the working modes of the electronic water valve 131 and the reference response time under standard conditions.

[0056] In this embodiment, the environmental compensation factor corresponding to the coolant temperature, the system pressure of the cooling system, and the power supply voltage of the electronic water valve 131 and the environmental compensation factor is determined by looking up the table according to the second correspondence table of the pre-calibrated coolant temperature, the system pressure of the cooling system, and the power supply voltage of the electronic water valve 131.

[0057] The establishment process of the second correspondence table is as follows: Under various preset environmental parameters in a non-standard environment (e.g., coolant temperature: -40℃, -20℃, 0℃, 20°C, 80℃; system pressure: 0.3bar, 0.5bar, 0.7bar; power supply voltage of electronic water valve 131: 9V, 12V, 14V), the actual response time required for electronic water valve 131 to complete different working mode switching is measured, and it is compared with the benchmark response time required for the corresponding working mode switching in the first correspondence table. The environmental compensation factor for each operating point is calculated by interpolation or data fitting (e.g., least squares fitting). Finally, a multidimensional lookup table of coolant temperature, system pressure of the cooling system, power supply voltage of electronic water valve 131, and environmental compensation factor is constructed and stored in the controller. During actual operation, the corresponding environmental compensation factor can be obtained by querying this multidimensional lookup table based on the real-time monitored coolant temperature, system pressure, and power supply voltage.

[0058] In this embodiment of the application, the specific steps for determining the real-time performance degradation coefficient based on the real-time response time, the baseline response time, and the environmental compensation factor include: calculating the real-time performance degradation coefficient K using the formula K=T_actual / (T_base*F_correction), where T_actual represents the real-time response time, T_base is the baseline response time, and F_correction is the environmental compensation factor.

[0059] By introducing an environmental compensation factor F_correction, the response time changes caused by reversible environmental factors such as coolant temperature, system pressure and power supply voltage are offset in advance, so that the calculated real-time performance degradation coefficient K purely reflects the response sluggishness caused by the irreversible performance degradation of the electronic water valve 131 itself (such as motor aging, bearing lubrication failure, gear wear, etc.).

[0060] For the adaptive control module 123, when the real-time performance attenuation coefficient is greater than the first preset threshold but not greater than the second preset threshold, it indicates that the response rate of the electronic water valve 131 has slowed down. The PWM duty cycle of the drive motor 132 is adaptively adjusted to compensate for the performance attenuation of the electronic water valve 131.

[0061] In the embodiments of this application, the first preset threshold refers to a number slightly larger than 1.

[0062] The second preset threshold K_max is set based on the highest acceptable performance standard of the whole vehicle or cooling system; in this embodiment, a direct method of determination is:

[0063] K_max = T_max / T_base

[0064] Among them, T_max is the longest response time of the electronic water valve 131 that the system can tolerate, and T_base is the reference response time under the current working condition. It is assumed that the cooling system requires that the maximum operation time for the electronic water valve 131 to switch between two working modes shall not exceed T_max = 8s, and the ideal reference time T_base = 4s under the current environment. Due to environmental factors (such as low voltage), the compensation factor F_correction = 1.5 is obtained by looking up the table. If the real-time response time T_actual = 8s, the real-time performance decay coefficient K is calculated as follows: K = 8 / (4*1.5) ≈ 1.33.

[0065] Meanwhile, the second preset threshold is set as: K_max = 8 / 4 = 2.

[0066] Since K < K_max at this time, it indicates that although the response time of the electronic water valve 131 has reached the upper limit, it is mainly due to environmental factors, and the performance decay of the valve body itself is still within the acceptable range and has not reached the severe fault threshold.

[0067] When the real-time performance decay coefficient is greater than the first preset threshold but does not exceed the second preset threshold, it means that the electronic water valve 131 has shown a clear performance decay, and the response rate has indeed slowed down, but it is currently still in the early or medium stage, and its performance decay can be effectively compensated and corrected by increasing the PWM duty cycle.

[0068] In the embodiment of the present application, the process of adaptively adjusting the PWM duty cycle of the drive motor 132 includes determining a PWM duty cycle compensation value according to the real-time performance decay coefficient, and adaptively adjusting the PWM duty cycle of the drive motor 132 based on the PWM duty cycle compensation value.

[0069] Among them, a compensation signal is generated through the formula: △ = α*(K - 1), where α is a gain coefficient used to control the compensation intensity, α is an adjustable parameter, α is determined by experimental calibration, and the value range of α is generally between 0.5 and 2.0. The target PWM duty cycle D_target of the drive motor 132 is determined through the formula D_target = D_actual*(1 + △), and the PWM duty cycle of the drive motor 132 is processed according to the target PWM duty cycle D_target, where D_actual is the real-time PWM duty cycle.

[0070] By monitoring the operating status of the electronic water valve 131 in real time, it can automatically maintain its optimal responsiveness when its performance naturally degrades due to long-term use. The controller 12 calculates a real-time performance degradation coefficient that accurately reflects the electronic water valve 131's performance status by comparing the real-time response time of the most recent switch between different operating modes with the baseline response time corrected by an environmental compensation factor. This real-time performance degradation coefficient effectively eliminates the influence of external environmental fluctuations such as coolant temperature, system pressure, and power supply voltage, directly revealing the performance degradation caused by irreversible factors such as internal mechanical wear of the valve body and motor aging.

[0071] When performance degradation of the electronic water valve 131 is detected, the controller 12 does not change the original hardware. Instead, it dynamically adjusts the PWM duty cycle signal output to the drive motor 132 based on the real-time performance degradation coefficient. This compensates for the increase in mechanical resistance by enhancing the electric driving force, thereby restoring the valve core movement speed to the expected level. The entire process is managed based on preset performance thresholds, which can proactively intervene in the early stages of performance degradation to extend service life, and provide timely warnings before serious failure, ensuring that the electronic water valve 131 maintains stable and rapid response characteristics throughout its entire life cycle.

[0072] The controller 12 in this embodiment further includes:

[0073] The fault warning module 121 is used to determine the fault degree of the electronic water valve 131 based on the real-time performance attenuation coefficient and the real-time PWM duty cycle, and output a corresponding level of fault warning based on the fault degree of the electronic water valve 131.

[0074] Specifically, if the real-time performance degradation coefficient is greater than the first preset threshold (e.g., 1.05) but not exceeding the second preset threshold, and the real-time PWM duty cycle has reached its preset upper limit, it indicates that the mechanical parts (e.g., bearings, gears) of the electronic water valve 131 have experienced early wear or slight jamming, leading to increased operating resistance. Although the controller 12 identifies the problem and tries its best to compensate, it cannot completely correct it. However, the electronic water valve 131 has not completely lost its function and can still work basically. Therefore, it is determined that the electronic water valve 131 has a minor fault, and a primary fault warning of minor performance degradation of the electronic water valve 131 is reported. The purpose is to remind the system to pay attention early and perform predictive maintenance. For example, this water valve can be checked or replaced first during vehicle maintenance to prevent the problem from worsening in a future critical task.

[0075] If the real-time performance degradation coefficient exceeds the second preset threshold but the real-time PWM duty cycle does not reach its preset upper limit, it indicates that there is a serious mechanical problem inside the electronic water valve 131, such as severe gear damage, severe valve core jamming, or internal short circuit in the motor. The performance degradation of the electronic water valve 131 is not linear, but rather a precipitous drop. At this time, the controller still attempts to increase the PWM output to try to maintain the normal operation of the water valve. Therefore, it is determined that the electronic water valve 131 has serious performance degradation but still has the possibility of recovery. A medium-level fault warning of serious performance degradation of the electronic water valve 131 is reported, reminding the user to arrange maintenance immediately.

[0076] If the real-time performance degradation coefficient exceeds the second preset threshold, and the real-time PWM duty cycle has reached its preset upper limit, it means that the electronic water valve 131 has severe performance degradation that cannot be recovered, and its operation is very slow or even may freeze. At this time, the controller 12 loses its effective control over the electronic water valve 131, and no matter how large the command is, the electronic water valve 131 cannot respond correctly. Therefore, it is determined that the electronic water valve 131 has a serious fault, and an advanced fault warning for the electronic water valve 131 is reported.

[0077] Reference Figure 2 In this embodiment of the application, an adaptive control method for maintaining the response rate of the vehicle's electronic water valve 131 is also provided, including:

[0078] S101, during the operation of the electronic water valve 131, acquire the real-time PWM duty cycle of the drive motor 132 that drives the electronic water valve 131, the operating environment parameters of the electronic water valve 131, and the performance feedback parameters.

[0079] S102, combining the real-time PWM duty cycle, operating environment parameters and performance feedback parameters, determine the real-time performance attenuation coefficient of the electronic water valve 131;

[0080] S103, when the real-time performance attenuation coefficient is greater than the first preset threshold but not greater than the second preset threshold, it indicates that the response rate of the electronic water valve 131 has slowed down, and the PWM duty cycle of the drive motor 132 is adaptively adjusted to compensate for the performance attenuation of the electronic water valve 131.

[0081] In some embodiments, the method further includes:

[0082] S103, based on the real-time performance attenuation coefficient and the real-time PWM duty cycle, determine the fault level of the electronic water valve 131, and output a corresponding level of fault warning based on the fault level of the electronic water valve 131.

[0083] In this embodiment, the operating environment parameters include: coolant temperature, system pressure of the cooling system, and power supply voltage of the electronic water valve 131; the performance feedback parameters include: the most recent completed operating mode switching sequence of the electronic water valve 131, and the real-time response time required for the most recent completed operating mode switching; the step S102 of determining the real-time performance attenuation coefficient of the electronic water valve 131 by combining the real-time PWM duty cycle, the operating environment parameters, and the performance feedback parameters includes:

[0084] Based on the most recent working mode switching sequence of the electronic water valve, determine the baseline response time required to complete the working mode switching sequence.

[0085] The environmental compensation factor is determined based on the coolant temperature, the system pressure of the cooling system, and the power supply voltage of the electronic water valve 131.

[0086] The real-time performance degradation coefficient is determined based on the real-time response time, the baseline response time, and the environmental compensation factor.

[0087] In this embodiment of the application, the reference response time required to complete the working mode switching sequence is determined by looking up a pre-defined first correspondence table between the working mode switching sequence and the reference response time.

[0088] In this embodiment of the application, the environmental compensation factor corresponding to the coolant temperature, the system pressure of the cooling system, the power supply voltage of the electronic water valve 131, and the environmental compensation factor is determined by looking up the table according to the second correspondence table of the pre-calibrated coolant temperature, the system pressure of the cooling system, and the power supply voltage of the electronic water valve 131.

[0089] In this embodiment of the application, the step S103 of adaptively adjusting the PWM duty cycle of the drive motor 132 to compensate for the performance degradation of the electronic water valve 131 includes:

[0090] The PWM duty cycle compensation value is determined based on the real-time performance attenuation coefficient.

[0091] Based on the PWM duty cycle compensation value, the PWM duty cycle of the drive motor 132 is adaptively adjusted.

[0092] In this embodiment of the application, the step S104 of determining the fault degree of the electronic water valve 131 based on the real-time performance attenuation coefficient and the real-time PWM duty cycle, and outputting a corresponding level of fault warning based on the fault degree of the electronic water valve 131, includes:

[0093] If the real-time performance degradation coefficient is greater than the first preset threshold but not the second preset threshold, and the real-time PWM duty cycle has reached its preset upper limit, then the electronic water valve 131 is determined to have a minor fault, and a primary fault warning of minor performance degradation of the electronic water valve 131 is reported.

[0094] If the real-time performance degradation coefficient exceeds the second preset threshold but the real-time PWM duty cycle does not reach its preset upper limit, then the electronic water valve 131 is determined to have a moderate fault, and a medium-level fault warning of severe performance degradation of the electronic water valve 131 is reported.

[0095] If the real-time performance degradation coefficient exceeds the second preset threshold and the real-time PWM duty cycle has reached its preset upper limit, then the electronic water valve 131 is determined to have a serious fault, and an advanced fault warning of serious fault in the electronic water valve 131 is reported.

[0096] It should be understood that the application of this application is not limited to the examples above. Those skilled in the art can make improvements or modifications based on the above description, and all such improvements and modifications should fall within the protection scope of the appended claims. Those skilled in the art can understand that implementing all or part of the processes of the above embodiments and making equivalent changes according to the claims of this application still fall within the scope of this application.

Claims

1. An adaptive control method for maintaining the response rate of an electronic water valve of a vehicle, characterized by, The method comprises: During operation of the electronic water valve, real-time PWM duty cycles of a driving motor driving the electronic water valve, operating environment parameters of the electronic water valve, and performance feedback parameters are acquired; Based on the real-time PWM duty cycles, the operating environment parameters, and the performance feedback parameters, a real-time performance attenuation coefficient of the electronic water valve is determined; If the real-time performance attenuation coefficient is greater than a first preset threshold but does not exceed a second preset threshold, the PWM duty cycles of the driving motor are adaptively adjusted to compensate for performance attenuation of the electronic water valve.

2. The adaptive control method of maintaining the response rate of a vehicle electronic water valve according to claim 1, wherein, The method further comprises: Based on the real-time performance attenuation coefficient and the real-time PWM duty cycles, a fault degree of the electronic water valve is determined, and a corresponding level of fault warning is output based on the fault degree of the electronic water valve.

3. The adaptive control method of maintaining the response rate of a vehicle electronic water valve according to claim 1, wherein, The operating environment parameters include cooling liquid temperature, system pressure of a cooling system, and power supply voltage of the electronic water valve, and the performance feedback parameters include a working mode switching sequence completed by the electronic water valve last time and a real-time response time required for completing the working mode switching last time; the step of determining the real-time performance attenuation coefficient of the electronic water valve based on the real-time PWM duty cycles, the operating environment parameters, and the performance feedback parameters comprises: Based on the working mode switching sequence completed by the electronic water valve last time, a reference response time required for completing the working mode switching sequence is determined; Based on the cooling liquid temperature, the system pressure of the cooling system, and the power supply voltage of the electronic water valve, an environment compensation factor is determined; Based on the real-time response time, the reference response time, and the environment compensation factor, the real-time performance attenuation coefficient is determined.

4. The adaptive control method of maintaining the response rate of a vehicle electronic water valve according to claim 3, wherein, Based on a first correspondence table of working mode switching sequences and reference response times pre-calibrated, the reference response time required for completing the working mode switching sequence is determined by table lookup.

5. The adaptive control method of maintaining the response rate of a vehicle electronic water valve according to claim 3, wherein, Based on a second correspondence table of cooling liquid temperature, system pressure of a cooling system, and power supply voltage of the electronic water valve and environment compensation factors pre-calibrated, the environment compensation factor corresponding to the cooling liquid temperature, the system pressure of the cooling system, and the power supply voltage of the electronic water valve is determined by table lookup.

6. The adaptive control method of maintaining a response rate of a vehicle electronic water valve according to claim 1, wherein, The step of adaptively adjusting the PWM duty cycles of the driving motor to compensate for performance attenuation of the electronic water valve comprises: A PWM duty cycle compensation value is determined based on the real-time performance attenuation coefficient; Based on the PWM duty cycle compensation value, the PWM duty cycles of the driving motor are adaptively adjusted.

7. The adaptive control method of maintaining the response rate of a vehicle electronic water valve according to claim 2, wherein, The step of determining the fault degree of the electronic water valve based on the real-time performance attenuation coefficient and the real-time PWM duty cycles, and outputting a corresponding level of fault warning based on the fault degree of the electronic water valve comprises: If the real-time performance attenuation coefficient is greater than a first preset threshold but does not exceed a second preset threshold, and the real-time PWM duty cycles have reached a preset upper limit, it is determined that the electronic water valve has a mild fault, and a primary fault warning that the electronic water valve has mild performance attenuation is reported; If the real-time performance attenuation coefficient exceeds the second preset threshold but the real-time PWM duty cycles do not reach the preset upper limit, it is determined that the electronic water valve has a moderate fault, and a middle-level fault warning that the electronic water valve has moderate performance attenuation is reported; If the real-time performance attenuation coefficient exceeds the second preset threshold, and the real-time PWM duty cycle has reached its preset upper limit, it is determined that the electronic water valve has a serious fault, and a high-level fault warning that the electronic water valve has a serious fault is reported.

8. A controller characterized by comprising: The application relates to an adaptive control device for an electronic water valve. The application relates to an adaptive control device for an electronic water valve. The application relates to an adaptive control device for an electronic water valve. The application relates to an adaptive control device for an electronic water valve.

9. The controller of claim 8, wherein, The application relates to an adaptive control device for an electronic water valve. The application relates to an adaptive control device for an electronic water valve.

10. A vehicle characterized by comprising: The application relates to an adaptive control device for an electronic water valve. The application relates to an adaptive control device for an electronic water valve. The application relates to an adaptive control device for an electronic water valve. The application relates to an adaptive control device for an electronic water valve. The application relates to an adaptive control device for an electronic water valve. The application relates to an adaptive control device for an electronic water valve. The application relates to an adaptive control device for an electronic water valve. The application relates to an adaptive control device for an electronic water valve. The application relates to an adaptive control device for an electronic water valve. The application relates to an adaptive control device for an electronic water valve. The application relates to an adaptive control device for an electronic water valve. The application relates to an adaptive control device for an electronic water valve. The application relates to an adaptive control device for an electronic water valve. The application relates to an adaptive control device for an electronic water valve. The application relates to an adaptive control device for an electronic water valve. The application relates to an adaptive control device for an electronic water valve. The application relates to an adaptive control device for an electronic water valve. The application relates to an adaptive control device for an electronic water valve. The application relates to an adaptive control device for an electronic water valve. The application relates to an adaptive control device for an electronic water valve. The application relates to an adaptive control device for an electronic water valve. The application relates to an adaptive control device for an electronic water valve. The application relates to an adaptive control device for an electronic water valve. The application relates to an adaptive control device for an electronic water valve. The application relates to an adaptive control device for an electronic water valve. The application relates to an adaptive control device for an electronic water valve. The application relates to an adaptive control device for an electronic water valve. The application relates to an adaptive control device for an electronic water valve. The application relates to an adaptive control device for an electronic water valve. The application relates to an adaptive control device for an electronic water valve. The application relates to an adaptive control device for an electronic water valve. The application relates to an adaptive control device for an electronic water valve. The application relates to an adaptive control device for an electronic water valve. The application relates to an adaptive control device for an electronic water valve. The application relates to an adaptive control device for an electronic water valve. The application relates to an adaptive control device for an electronic water valve. The application relates to an adaptive control device for an

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