A new energy automobile electronic water valve control device
By introducing a control module, a sensor module, and PID closed-loop control into the electronic water valve of new energy vehicles, combined with self-calibration and mechanical limit judgment, the problem of high-precision control that cannot be achieved in the existing technology has been solved, and high-precision position control and constant speed operation of the electronic water valve have been realized.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- NINGBO TUOPU GROUP CO LTD
- Filing Date
- 2023-09-25
- Publication Date
- 2026-05-12
AI Technical Summary
现有新能源汽车电子水阀无法实现高精度控制，无法实时获取阀门角度信息。
By combining a control module, a drive module, a sensor module, an actuator module, and a communication module, and through a self-calibration control strategy and a PID closed-loop control algorithm, the valve body position is detected in real time and mechanical limit judgment is performed. Combined with PWM modulation wave to adjust the motor speed, high-precision position control of the electronic water valve is achieved.
It achieves high-precision position control of electronic water valves, ensuring accurate positioning and constant speed operation of the valve body at the target position, thereby improving heat utilization efficiency.
Smart Images
Figure CN117329340B_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of valve control technology, and in particular to an electronic water valve control device for new energy vehicles. Background Technology
[0002] Currently, with the improvement of people's living standards, private cars have become an indispensable means of transportation for most families. Since petroleum is a non-renewable energy source, new energy vehicles are gradually becoming the mainstream mode of transportation. However, the development of new energy vehicles has now entered a bottleneck period. Problems such as battery depletion, rapid battery drain, and low battery utilization in winter have become the primary challenges to overcome. Therefore, efficient heat utilization is key to solving these problems.
[0003] An electronic water valve is an electrically driven valve that controls the flow rate and direction of water. Through high-precision control of column valves / butterfly valves, it regulates the flow distribution in various pipelines, enabling efficient heat utilization. Existing electronic water valves employ an integrated control and actuator design, using CAN / LIN communication for real-time actuator control. The actuator, driven by a brushless motor and gear set, rotates the valve body, thereby changing its angle. Existing patent document CN114562591A describes a scheme for remote actuator control, but it cannot obtain valve angle information in real time, thus failing to achieve high-precision control. Summary of the Invention
[0004] The technical problem to be solved by the present invention is to provide an electronic water valve control device for new energy vehicles, which can improve the position control accuracy of the electronic water valve.
[0005] The technical solution adopted by this invention to solve its technical problem is as follows: A control device for an electronic water valve in a new energy vehicle is provided, comprising a control module, a drive module, a sensor module, an actuator module, and a communication module; the control module is connected to the drive module, the sensor module, and the communication module respectively, and the drive module is connected to the actuator module; the sensor module is used to collect and detect the angle signal of the valve body of the electronic water valve; the drive module is used to drive the actuator module; the actuator module is used to drive the valve body of the electronic water valve to rotate to change the valve body angle; the communication module is used to communicate with the vehicle; the control module is used to coordinate the communication module, the sensor module, and the drive module to complete the valve body position operation of the electronic water valve; the control module internally sets a self-calibration control strategy and a position operation control strategy, the self-calibration control strategy is used to determine the initial position of the valve body of the electronic water valve; the position operation control strategy is used to move the valve body of the electronic water valve to a target position.
[0006] When the control module executes the self-calibration control strategy, the controller sends a first control command to the drive module to make the actuator module run at full speed in the first direction. When the current of the actuator module exceeds the threshold, the sensor module obtains the current position of the electronic water valve body, and the control module determines the current position of the electronic water valve body as the first mechanical limit. The controller sends a stop command to the drive module, and after a preset time, sends a second control command to the drive module to make the actuator module run at full speed in the second direction. When the current of the actuator module exceeds the threshold, the sensor module obtains the current position of the electronic water valve body, and the control module determines the current position of the electronic water valve body as the second mechanical limit. The control module calculates the target angle to return to the initial position based on the first mechanical limit, the second mechanical limit, and the preset execution angle of the electronic water valve, and controls the actuator module to run the target angle in the first direction, so that the electronic water valve body is in the initial position.
[0007] The control module calculates the target angle for returning to the initial position based on the first mechanical limit, the second mechanical limit, and the preset execution angle of the electronic water valve. Specifically:
[0008] The full stroke angle is determined based on the first and second mechanical limits. ;
[0009] From the perspective of the entire journey and the preset execution angle of the electronic water valve Calculate the target angle from the second mechanical limit to the initial position. The calculation method is as follows: .
[0010] When the control module executes the position operation control strategy, the communication module receives the vehicle's position angle adjustment command, the control module calculates the distance between the adjusted position and the initial position, and drives the actuator module through the drive module to move the electronic water valve to the adjusted position; the drive module uses PWM modulation wave to adjust the running speed of the actuator module; the control module uses PID closed-loop control algorithm, calculates the PWM duty cycle by reading the valve body angle signal of the electronic water valve fed back by the sensor module in real time, and sends it to the drive module so that the actuator module maintains a constant speed during the position operation.
[0011] The control module calculates the PWM duty cycle and sends it to the drive module by reading the angle signal of the electronic water valve body fed back by the sensor module in real time. Specifically, when the real-time angle increment fed back by the sensor is less than a set threshold within a unit time, the PWM duty cycle output is increased; when the real-time angle increment fed back by the sensor is greater than the set threshold within a unit time, the PWM duty cycle output is decreased.
[0012] When the control module executes the position operation control strategy, it adds a mechanical compensation constant to eliminate the deviation when it detects that the electronic water valve is switching between forward and reverse.
[0013] The mechanical compensation constant is obtained by controlling the electronic water valve to move in the first direction to reach the position. Record the current traffic data for each channel. The electronic water valve is controlled to continue moving in the first direction until it reaches the position. Then, the electronic water valve is controlled to move in the second direction with minimum control precision, while the flow data of each channel is monitored. When the flow data of each channel reaches... Record the current position. ,pass Calculate the mechanical compensation constant .
[0014] When the control module executes the position operation control strategy, it compensates for the previous angle deviation each time the valve body of the electronic water valve moves.
[0015] The method of compensating for the previous angle deviation each time the valve body of the electronic water valve moves is as follows: after the valve body of the electronic water valve stops moving, the deviation N is detected and recorded. If the direction of the valve body of the electronic water valve moving next time is the same as the direction of the previous movement, the target moving angle is reduced by the deviation N. If the direction of the valve body of the electronic water valve moving next time is opposite to the direction of the previous movement, the target moving angle is increased by the deviation N.
[0016] Beneficial effects
[0017] By employing the above-mentioned technical solutions, this invention has the following advantages and positive effects compared with existing technologies: This invention uses a full-speed motor operation mode, determines the left and right mechanical limits of the electronic water valve through a current threshold, and calculates and positions the initial position of the electronic water valve by detecting the left and right mechanical limits and collecting sensor angle signals between the limits, thereby achieving the self-calibration function of the electronic water valve. This invention uses PID closed-loop constant speed control, adjusts the PWM output duty cycle based on sensor signals to regulate the motor speed, ensuring constant speed operation of the electronic water valve. This invention also uses algorithms to compensate for mechanical deviations and control accuracy deviations, thereby ensuring the position control accuracy of the electronic water valve. Attached Figure Description
[0018] Figure 1 This is a block diagram of the electronic water valve control device for new energy vehicles according to an embodiment of the present invention;
[0019] Figure 2This is a schematic diagram of self-calibration control in an embodiment of the present invention;
[0020] Figure 3 This is a schematic diagram of PID closed-loop control during the position operation control strategy in an embodiment of the present invention. Detailed Implementation
[0021] The present invention will be further illustrated below with reference to specific embodiments. It should be understood that these embodiments are for illustrative purposes only and are not intended to limit the scope of the invention. Furthermore, it should be understood that after reading the teachings of this invention, those skilled in the art can make various alterations or modifications to the invention, and these equivalent forms also fall within the scope defined by the appended claims.
[0022] The embodiments of the present invention relate to an electronic water valve control device for new energy vehicles, such as... Figure 1 As shown, the system includes a control module, a drive module, a sensor module, an actuator module, and a communication module. The control module is connected to the drive module, sensor module, and communication module, respectively. The drive module is connected to the actuator module. The sensor module is used to collect and detect the angle signal of the electronic water valve body. The drive module is used to drive the actuator module. The actuator module is used to rotate the electronic water valve body to change the valve body angle. The communication module is used for communication with the vehicle. The control module coordinates the communication module, sensor module, and drive module to complete the valve body position operation of the electronic water valve. The actuator module can be a DC brushed motor, and the sensor module can be a non-contact Hall sensor.
[0023] In this embodiment, the control module is equipped with a self-calibration control strategy and a position operation control strategy. The self-calibration control strategy is used to determine the initial position of the electronic water valve body. Since the non-contact sensor is a relative position sensor, the water valve needs to perform self-calibration control before the initial position can be determined to clarify the initial reference position of the water valve displacement. The position operation control strategy is used to move the electronic water valve body to the target position. Different water valve angles can make different circuits of the whole vehicle achieve the cooling effect.
[0024] When the control module executes the self-calibration control strategy, the controller sends a first control command to the drive module to make the DC brushed motor run at full speed in the clockwise direction. When the current of the DC brushed motor exceeds the threshold, the sensor module obtains the current position of the electronic water valve body, and the control module determines the current position of the electronic water valve body as the left mechanical limit. The controller sends a stop command to the drive module, and after a preset time, sends a second control command to the drive module to make the DC brushed motor run at full speed in the counterclockwise direction. When the current of the DC brushed motor exceeds the threshold, the sensor module obtains the current position of the electronic water valve body, and the control module determines the current position of the electronic water valve body as the second mechanical limit. The control module calculates the target angle to return to the initial position based on the first mechanical limit, the second mechanical limit, and the preset execution angle of the electronic water valve, and controls the actuator module to run the target angle in the first direction, so that the electronic water valve body is in the initial position.
[0025] like Figure 2 As shown, the target angle at the initial position is calculated in the following way:
[0026] The full stroke angle is determined based on the first and second mechanical limits. ;
[0027] From the perspective of the entire journey and the preset execution angle of the electronic water valve Calculate the target angle from the second mechanical limit to the initial position. The calculation method is as follows: .
[0028] When the control module executes the position operation control strategy, the communication module receives the vehicle's position angle adjustment command, the control module calculates the distance between the adjusted position and the initial position, and drives the actuator module through the drive module to move the electronic water valve to the adjusted position; the drive module uses PWM modulation wave to adjust the running speed of the actuator module; the control module uses a PID closed-loop control algorithm (see...). Figure 3 The actuator module calculates the PWM duty cycle by reading the angle signal of the electronic water valve body fed back by the sensor module in real time and sends it to the drive module, so that the actuator module maintains a constant speed during the position operation.
[0029] The control module calculates the PWM duty cycle and sends it to the drive module by reading the angle signal of the electronic water valve body fed back by the sensor module in real time. Specifically, when the real-time angle increment fed back by the sensor is less than a set threshold within a unit time, the PWM duty cycle output is increased; when the real-time angle increment fed back by the sensor is greater than the set threshold within a unit time, the PWM duty cycle output is decreased.
[0030] When the control module executes the position operation control strategy, it adds a mechanical compensation constant to eliminate the deviation when it detects that the electronic water valve is switching between forward and reverse directions. The mechanical compensation constant is obtained by controlling the electronic water valve to move in the first direction to reach the position. Record the current traffic data for each channel. The electronic water valve is controlled to continue moving in the first direction until it reaches the position. Then, the electronic water valve is controlled to move in the second direction with minimum control precision, while the flow data of each channel is monitored. When the flow data of each channel reaches... Record the current position. ,pass Calculate the mechanical compensation constant .
[0031] When the control module executes the position operation control strategy, it compensates for the previous angle deviation each time the valve body of the electronic water valve moves, ensuring the accuracy of the water valve position control. Specifically, this compensation for the previous angle deviation each time the valve body moves is performed: after each stop of the electronic water valve's position movement, the deviation N is detected and recorded. If the next movement direction of the electronic water valve's position is the same as the previous movement direction, the target movement angle is reduced by the deviation N; if the next movement direction is opposite to the previous movement direction, the target movement angle is increased by the deviation N.
[0032] It is easy to see that this invention employs a full-speed motor operation mode, using a current threshold to determine the left and right mechanical limits of the electronic water valve. By detecting the left and right mechanical limits of the electronic water valve and collecting sensor angle signals between the limits, the initial position of the electronic water valve is calculated and positioned, thereby achieving the self-calibration function of the electronic water valve. This invention uses PID closed-loop constant speed control, collecting sensor signals and adjusting the PWM output duty cycle based on the sensor signals to regulate the motor speed, ensuring constant speed operation of the electronic water valve. This invention also uses algorithms to compensate for mechanical deviations and control precision deviations, thereby ensuring the position control accuracy of the electronic water valve.
Claims
1. A new energy vehicle electronic water valve control device, characterized in that, The system includes a control module, a drive module, a sensor module, an actuator module, and a communication module. The control module is connected to the drive module, sensor module, and communication module, respectively, and the drive module is connected to the actuator module. The sensor module is used to collect and detect the angle signal of the electronic water valve body. The drive module is used to drive the actuator module. The actuator module is used to rotate the electronic water valve body to change the valve body angle. The communication module is used to communicate with the vehicle. The control module is used to coordinate the communication module, sensor module, and drive module to complete the valve body position operation of the electronic water valve. The control module internally sets a self-calibration control strategy and a position operation control strategy. The self-calibration control strategy is used to determine the initial position of the electronic water valve body. The position operation control strategy is used to move the electronic water valve body to the target position. When the control module executes the self-calibration control strategy, it sends a first control command to the drive module to make the actuator module run at full speed in the first direction. When the current of the actuator module exceeds the threshold, the sensor module obtains the current position of the electronic water valve body, and the control module determines the current position of the electronic water valve body as the first mechanical limit. The control module sends a stop command to the drive module, and after a preset time, sends a second control command to the drive module to make the actuator module run at full speed in the second direction. When the current of the actuator module exceeds the threshold, the sensor module obtains the current position of the electronic water valve body, and the control module determines the current position of the electronic water valve body as the second mechanical limit. The control module calculates the target angle to return to the initial position based on the first mechanical limit, the second mechanical limit, and the preset execution angle of the electronic water valve, and controls the actuator module to run the target angle in the first direction, so that the electronic water valve body is in the initial position. The control module calculates the target angle for returning to the initial position based on the first mechanical limit, the second mechanical limit, and the preset execution angle of the electronic water valve. Specifically: The full stroke angle is determined based on the first and second mechanical limits. ; From the perspective of the entire journey and the preset execution angle of the electronic water valve Calculate the target angle from the second mechanical limit to the initial position. The calculation method is as follows: .
2. The electronic water valve control device for new energy vehicles according to claim 1, characterized in that, When the control module executes the position operation control strategy, the communication module receives the vehicle's position angle adjustment command, the control module calculates the distance between the adjusted position and the initial position, and drives the actuator module through the drive module to move the electronic water valve to the adjusted position; the drive module uses PWM modulation wave to adjust the running speed of the actuator module; the control module uses PID closed-loop control algorithm, calculates the PWM duty cycle by reading the valve body angle signal of the electronic water valve fed back by the sensor module in real time, and sends it to the drive module so that the actuator module maintains a constant speed during the position operation.
3. The electronic water valve control device for new energy vehicles according to claim 2, characterized in that, The control module calculates the PWM duty cycle and sends it to the drive module by reading the angle signal of the electronic water valve body fed back by the sensor module in real time. Specifically, when the real-time angle increment fed back by the sensor is less than a set threshold within a unit time, the PWM duty cycle output is increased; when the real-time angle increment fed back by the sensor is greater than the set threshold within a unit time, the PWM duty cycle output is decreased.
4. The electronic water valve control device for new energy vehicles according to claim 1, characterized in that, When the control module executes the position operation control strategy, it adds a mechanical compensation constant to eliminate the deviation when it detects that the electronic water valve is switching between forward and reverse.
5. The electronic water valve control device for new energy vehicles according to claim 4, characterized in that, The mechanical compensation constant is obtained by controlling the electronic water valve to move in the first direction to reach the position. Record the current traffic data for each channel. The electronic water valve is controlled to continue moving in the first direction until it reaches the position. Then, the electronic water valve is controlled to move in the second direction with minimum control precision, while the flow data of each channel is monitored. When the flow data of each channel reaches... Record the current position. ,pass Calculate the mechanical compensation constant .
6. The electronic water valve control device for new energy vehicles according to claim 1, characterized in that, When the control module executes the position operation control strategy, it compensates for the previous angle deviation each time the valve body of the electronic water valve moves.
7. The electronic water valve control device for new energy vehicles according to claim 6, characterized in that, The method of compensating for the previous angle deviation each time the valve body of the electronic water valve moves is as follows: after the valve body of the electronic water valve stops moving, the deviation N is detected and recorded. If the direction of the valve body of the electronic water valve moving next time is the same as the direction of the previous movement, the target moving angle is reduced by the deviation N. If the direction of the valve body of the electronic water valve moving next time is opposite to the direction of the previous movement, the target moving angle is increased by the deviation N.