Test System and Method for the Performance of Electronic Water Pump Controller

Abstract

This disclosure provides a testing system and method for the performance of an electronic water pump controller, belonging to the field of performance testing technology for electronic devices. The testing system includes a detection module, a flow regulation module, and a processing module. The flow regulation module is connected between the electronic water pump and the cooling system. The detection module is connected between the electronic water pump controller and the electronic water pump, and between the electronic water pump and the cooling system. The processing module is connected to the detection module and is used to obtain performance data based on multiple sets of detection values, and to determine whether the electronic water pump controller under test meets control requirements based on the performance data. The performance data includes at least one of the following: a flow-head curve, a flow-electronic water pump assembly efficiency curve, and a flow-electronic water pump controller efficiency curve. The testing system and method provided by this disclosure can improve the testing accuracy of electronic water pumps.

Description

Technical Field

[0001] This disclosure belongs to the field of performance testing technology for electronic devices, and specifically relates to a testing system and method for the performance of an electronic water pump controller. Background Technology

[0002] To achieve lower fuel consumption in automotive powertrains, mechanical water pumps are gradually being replaced by electric water pumps. Replacing mechanical water pumps with electric water pumps essentially changes the original method of using the engine's crankshaft to drive the impeller; instead, a drive motor directly controls the impeller's rotation, serving as the energy source for the cooling system.

[0003] In related technologies, electronic water pumps are controlled by electronic water pump controllers. During the development of electronic water pumps, the performance of the electronic water pump controller needs to be tested. The performance testing of the electronic water pump controller generally follows this process: the drive motor operates at the required speed, and the electronic water pump controller ensures that the output torque of the drive motor reaches the corresponding target value. Then, at the target value, the output power of the drive motor and the input electrical power of the electronic water pump controller are measured respectively, and the ratio of output power to input electrical power is calculated. The ratio corresponding to different torques reflects whether the performance of the electronic water pump controller meets the requirements.

[0004] However, since the output torque of the drive motor does not exceed 1 Nm, it is unavoidable to measure the output torque when the above method is used to bring the output torque of the drive motor to the target value. Because the output torque of the drive motor is too small, it cannot be measured accurately, which makes it impossible to guarantee that the output torque of the drive motor is at the target value (the current output torque cannot be accurately measured). This makes it impossible to reliably complete the performance test of the electronic water pump controller, thus affecting the test accuracy of the electronic water pump. Summary of the Invention

[0005] This disclosure provides a testing system and method for the performance of an electronic water pump controller, which can improve the testing accuracy of electronic water pumps. The technical solution is as follows: This disclosure provides a testing system and method for the performance of an electronic water pump controller. The electronic water pump controller is connected to the drive motor of the electronic water pump and controls the rotation of the drive motor. The drive motor drives an impeller to rotate, thereby driving the flow of coolant in a cooling system under test in an automobile. The testing system includes a detection module, a flow regulation module, and a processing module. The flow regulation module is connected between the electronic water pump and the cooling system and is used to regulate the output flow rate of the electronic water pump. The detection module is connected between the electronic water pump controller and the electronic water pump, and between the electronic water pump and the cooling system, and is used to obtain multiple sets of detection values ​​when the electronic water pump is at a target speed. Each set of detection values ​​includes the performance of the electronic water pump controller. The input electrical power, the output electrical power of the electronic water pump controller, the output flow rate of the electronic water pump, the water pressure at the inlet of the electronic water pump, and the water pressure at the outlet of the electronic water pump are all measured. The output flow rate varies in different sets of the measured values. The target speed is at least one of the speeds corresponding to the drive motor under normal operating conditions. The processing module is connected to the detection module and is used to obtain performance data based on the multiple sets of measured values, and to determine whether the electronic water pump controller under test meets the control requirements based on the performance data. The performance data includes at least one of the following relationship curves: flow rate-head curve, flow rate-electronic water pump assembly efficiency curve, and flow rate-electronic water pump controller efficiency curve.

[0006] In another implementation of this disclosure, the flow regulation module is connected between the electronic water pump and the cooling system, and the flow regulation module includes a control valve.

[0007] In another implementation of this disclosure, the detection module includes a first pressure sensor, a second pressure sensor, a flow meter, a first power analyzer, and a second power analyzer. The first pressure sensor is connected to the inlet of the electronic water pump, the second pressure sensor is connected to the outlet of the electronic water pump, and the flow meter is connected to the outlet of the electronic water pump. The first power analyzer is connected to the input terminal of the electronic water pump controller under test, and the second power analyzer is connected to the output terminal of the electronic water pump controller under test. The input terminal of the electronic water pump controller is connected to a power supply, and the output terminal of the electronic water pump controller is connected to the electronic water pump.

[0008] In another implementation of this disclosure, the detection module further includes a first temperature sensor and a second temperature sensor, wherein the first temperature sensor is connected to the inlet of the electronic water pump and the second temperature sensor is connected to the outlet of the electronic water pump.

[0009] In another implementation of this disclosure, the processing module is used to determine the head of the electronic water pump using the following formula, so as to obtain the flow-head curve based on the head and the corresponding output flow rate: ; Where P is the water pressure at the inlet of the electronic water pump; P is the water pressure at the outlet of the electronic water pump. Let g be the density of the coolant and g be the acceleration due to gravity.

[0010] In another implementation of this disclosure, the processing module is used to determine the efficiency of the electronic water pump assembly using the following formula, so as to obtain the flow rate-electronic water pump assembly efficiency curve based on the efficiency of the electronic water pump assembly and the corresponding output flow rate. The electronic water pump assembly includes the electronic water pump and the electronic water pump controller. ; in, denoted as η, where η is the efficiency of the electronic water pump assembly; Q is the output flow rate of the electronic water pump; H is the head of the electronic water pump; and g is the acceleration due to gravity. P is the density of the coolant. 入 This refers to the electrical power input to the electronic water pump controller.

[0011] In another implementation of this disclosure, the processing module is used to calculate the efficiency of the electronic water pump controller using the following formula, so as to obtain the flow rate-electronic water pump controller efficiency curve based on the efficiency of the electronic water pump controller and the corresponding output flow rate: ; in, For the efficiency of electronic water pump control; P 出 P represents the electrical power output of the electronic water pump controller. 入 This refers to the electrical power input to the electronic water pump controller.

[0012] On the other hand, this disclosure also provides a method for testing the performance of an electronic water pump controller. The method includes: obtaining multiple sets of detection values ​​when the electronic water pump is at a target speed, each set of detection values ​​including the input power of the electronic water pump controller, the output power of the electronic water pump controller, the output flow rate of the electronic water pump, the water pressure at the inlet of the electronic water pump, and the water pressure at the outlet of the electronic water pump, wherein the output flow rate in different sets of detection values ​​is different, and the target speed is at least one of the speeds corresponding to the drive motor under normal operating conditions; obtaining performance data based on the multiple sets of detection values, the performance data including at least one of the relationship curves of flow rate-head curve, flow rate-electronic water pump assembly efficiency curve, and flow rate-electronic water pump controller efficiency curve; and determining whether the electronic water pump controller under test meets the control requirements based on the performance data.

[0013] In another implementation of this disclosure, obtaining multiple sets of detection values ​​when the electronic water pump is at the target speed includes: adjusting the opening of the control valve to make the electronic water pump have different output flow rates when the electronic water pump is at the target speed; and obtaining the input power of the electronic water pump controller, the output power of the electronic water pump controller, the water pressure at the inlet of the electronic water pump, and the water pressure at the outlet of the electronic water pump when the electronic water pump is at different output flow rates.

[0014] In another implementation of this disclosure, determining whether the electronic water pump controller under test meets the control requirements based on the performance data includes: determining whether the electronic water pump meets the operating condition requirements based on the flow-head curve in the performance data; if the electronic water pump meets the operating condition requirements, and the flow-electronic water pump assembly efficiency curve and the flow-electronic water pump controller efficiency curve in the performance data also meet the corresponding efficiency requirements, then the electronic water pump controller under test meets the control requirements.

[0015] The beneficial effects of the technical solutions provided in this disclosure are: When testing an electronic water pump controller using the testing system provided in this embodiment, the system includes a detection module and a flow regulation module. The flow regulation module is used to adjust the output flow of the electronic water pump, while the detection module is used to obtain multiple sets of detection values ​​when the electronic water pump is at a target speed. In this way, the electronic water pump controller can control the electronic water pump to each target speed, while the flow regulation module adjusts the output flow of the electronic water pump, and the detection module obtains each set of detection values ​​at each target speed.

[0016] Furthermore, the testing system also includes a processing module, which is used to obtain performance data based on multiple sets of detection values, and to judge the electronic water pump under test based on the performance data. In this way, performance data can be obtained based on the detection values ​​corresponding to different flow rates at each target speed. Finally, the electronic water pump controller is judged based on the performance data to confirm whether the electronic water pump controller can meet the control requirements of the electronic water pump.

[0017] As can be seen, the above testing system does not require testing the output torque of the motor. Instead, it directly judges the electronic water pump controller based on the corresponding performance data. This can greatly improve the testing accuracy and thus improve the reliability of the electronic water pump controller. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this disclosure, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of a test system for an electronic water pump controller provided in an embodiment of this disclosure; Figure 2 This is a schematic diagram showing the distribution of the detection modules provided in an embodiment of this disclosure; Figure 3 This is a schematic diagram of the performance data provided in the embodiments of this disclosure; Figure 4 This is a flowchart of a testing method for an electronic water pump controller provided in an embodiment of this disclosure.

[0020] The symbols in the diagram represent the following meanings: 1. Detection module; 111. First pressure sensor; 112. Second pressure sensor; 12. Flow meter; 131. First power analyzer; 132. Second power analyzer; 151. First temperature sensor; 152. Second temperature sensor; 2. Flow regulation module; 3. Processing module; 100. Electronic water pump controller; 200. Electronic water pump; 300. Voltage regulator; 400. Inlet and outlet water pipes; 500. Power supply. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of this disclosure clearer, the embodiments of this disclosure will be described in further detail below with reference to the accompanying drawings.

[0022] The electric water pump 200 includes a drive motor, an impeller, and a volute. The drive motor is connected to the impeller and drives the impeller to rotate. The impeller is mounted inside the volute. The volute is connected to the inlet and outlet water pipes 400 of the cooling system. The electric water pump 200 is used to drive the flow of coolant (e.g., water) within the cooling system to cool and lower the temperature of automotive components.

[0023] The electronic water pump controller 100 is connected inside the drive motor and is used to control the operating status of the drive motor.

[0024] To ensure stable water flow within the cooling system, a voltage regulator 300 is connected to the cooling system (see [reference]). Figure 2 Here, a pressure regulator refers to a pressure stabilizer that suppresses water pressure fluctuations.

[0025] This disclosure provides a testing system for the performance of an electronic water pump controller. The electronic water pump controller is connected to the drive motor of the electronic water pump and is used to control the rotation of the drive motor.

[0026] like Figure 1 As shown, the test system includes a detection module 1, a flow regulation module 2, and a processing module 3. The flow regulation module 2 is connected between the electronic water pump and the cooling system, and is used to regulate the output flow of the electronic water pump.

[0027] The detection module 1 is connected between the electronic water pump controller under test and the electronic water pump, as well as between the electronic water pump and the cooling system. It is used to obtain multiple sets of detection values ​​when the electronic water pump is at the target speed. Each set of detection values ​​includes the input power of the electronic water pump controller, the output power of the electronic water pump controller, the output flow rate of the electronic water pump, the water pressure at the inlet of the electronic water pump, and the water pressure at the outlet of the electronic water pump. The output flow rate is different in different sets of detection values. The target speed is at least one of the speeds corresponding to the drive motor when it is in normal operating condition.

[0028] Processing module 3 is connected to detection module 1 and is used to obtain performance data based on multiple sets of detection values, and to determine whether the electronic water pump controller under test meets the control requirements based on the performance data. The performance data includes at least one of the following relationship curves: flow-head curve, flow-electronic water pump assembly efficiency curve, and flow-electronic water pump controller efficiency curve.

[0029] When testing an electronic water pump controller using the testing system provided in this embodiment, the system includes a detection module 1 and a flow regulation module 2. The flow regulation module 2 is used to regulate the output flow of the electronic water pump, while the detection module 1 is used to obtain multiple sets of detection values ​​when the electronic water pump is at a target speed. In this way, the electronic water pump controller can control the electronic water pump to each target speed, while the flow regulation module 2 regulates the output flow of the electronic water pump, and the detection module 1 obtains each set of detection values ​​at each target speed.

[0030] Furthermore, the testing system also includes a processing module 3, which is used to obtain performance data based on multiple sets of detection values, and to judge the electronic water pump under test based on the performance data. In this way, performance data can be obtained based on the detection values ​​corresponding to different flow rates at each target speed. Finally, the electronic water pump controller is judged based on the performance data to confirm whether the electronic water pump controller can meet the control requirements of the electronic water pump.

[0031] As can be seen, the above testing system does not require testing the output torque of the motor. Instead, it directly judges the electronic water pump controller based on the corresponding performance data. This can greatly improve the testing accuracy and thus improve the reliability of the electronic water pump controller.

[0032] Of course, in this embodiment, the test system also includes a power supply 500, which is electrically connected to the input terminal of the electronic water pump controller 100 to supply power to the electronic water pump controller 100. The output terminal of the electronic water pump controller 100 is connected to the drive motor of the electronic water pump 200 to control the operating state of the drive motor, such as speed, torque, etc.

[0033] Optionally, the flow regulation module 2 is connected between the electronic water pump and the cooling system, and the flow regulation module 2 is a control valve.

[0034] In the above implementation, the flow regulation module 2 includes a control valve, so that the output flow rate of the electronic water pump can be controlled by adjusting the opening degree of the control valve, thereby obtaining the detection value under different flow rates.

[0035] For example, the control valve can be a PID (Proportional, Integral, Derivative) valve.

[0036] The control principle of a PID valve is to use the output of a PID controller as the control signal for the valve. By changing the valve opening, the output flow rate of the electronic water pump is adjusted. The PID valve can automatically adjust its actual opening based on the difference between its actual opening and the target opening, gradually bringing the actual opening closer to the target opening, thus precisely controlling the output flow rate of the electronic water pump. In other words, the PID valve has high precision and can dynamically adjust the valve opening based on real-time feedback from the system, allowing the valve opening to quickly and accurately approach the set value, thereby improving the system's control accuracy.

[0037] See Figure 2 Optionally, the detection module 1 includes a first pressure sensor 111, a second pressure sensor 112, a flow meter 12, a first power analyzer 131, and a second power analyzer 132.

[0038] A first pressure sensor 111 is connected to the inlet of the electronic water pump 200. A second pressure sensor 112 is connected to the outlet of the electronic water pump 200 to detect the water pressure at the outlet. A flow meter 12 is connected to the outlet of the electronic water pump 200 to detect the output flow rate of the electronic water pump 200. A first power analyzer 131 is connected to the input terminal of the electronic water pump controller 100 under test to detect the input electrical power of the electronic water pump controller 100. A second power analyzer 132 is connected to the output terminal of the electronic water pump controller 100 under test to detect the output electrical power of the electronic water pump controller 100.

[0039] Optionally, the detection module 1 further includes a first temperature sensor 151 and a second temperature sensor 152. The first temperature sensor 151 is connected to the inlet of the electronic water pump 200 and is used to detect the temperature of the coolant at the inlet of the electronic water pump 200. The second temperature sensor 152 is connected to the outlet of the electronic water pump 200 and is used to detect the temperature of the coolant at the outlet of the electronic water pump 200.

[0040] The temperature of the inlet and outlet of the electronic water pump 200 can be detected by the first temperature sensor 151 and the second temperature sensor 152, thereby ensuring that the coolant in the electronic water pump 200 is at the same temperature condition each time a test is performed, avoiding the influence of different water temperatures on the test values, and thus improving the accuracy of the test values.

[0041] In this embodiment, the first temperature sensor 151 and the first pressure sensor 111 can be integrated together to form a temperature and pressure detection module. This facilitates arrangement and saves space.

[0042] Of course, the second temperature sensor 152 and the second pressure sensor 112 can also be integrated together to form another temperature and pressure detection module.

[0043] In this embodiment, when the processing module 3 obtains the performance data, it can first obtain the head of the electronic water pump according to the following formula.

[0044] ; (1) Where P1 is the water pressure at the inlet of the electronic water pump; P2 is the water pressure at the outlet of the electronic water pump. Let g be the density of the coolant and g be the acceleration due to gravity.

[0045] P1 is obtained by the first pressure sensor 111, and P2 is obtained by the second pressure sensor 112.

[0046] As can be seen, when the drive motor is at the same target speed, different output flow rates can be controlled to obtain different heads corresponding to different head of the electronic water pump. That is, when the drive motor is at the same target speed, one output flow rate corresponds to one head.

[0047] Next, the efficiency of the electronic water pump controller can also be obtained according to the following formula (2).

[0048] ; (2) in, For the efficiency of the electronic water pump controller; P 出 The electronic water pump controller outputs electrical power; P 入 Input electrical power to the electronic water pump controller.

[0049] P 出 The power was obtained by detection using a second power analyzer 132. 入 The power was obtained by detection using the first power analyzer 131.

[0050] Similarly, when the drive motor is at the same target speed, by controlling the different output flow rates, the output power and input power of the electronic water pump controller corresponding to different output flow rates can be detected, and thus the efficiency of the electronic water pump controller corresponding to different output flow rates can be obtained.

[0051] Next, the effective power of the electronic water pump can also be obtained according to the following formula (3).

[0052] ; (3) Where Pe is the effective power of the electronic water pump; Q is the output flow rate of the electronic water pump; H is the head of the electronic water pump; and g is the acceleration due to gravity. This refers to the density of the coolant.

[0053] Q is obtained by flow meter 12. H is calculated by formula (1).

[0054] Similarly, when the drive motor is at the same target speed, the effective power of the electronic water pump corresponding to different output flow rates can be detected by controlling the different output flow rates.

[0055] The efficiency of the electronic water pump assembly can also be obtained according to the following formula (4).

[0056] The electronic water pump assembly includes an electronic water pump and an electronic water pump controller.

[0057] ; (4) in, The efficiency of the electric water pump assembly is represented by Pe; the effective power of the electric water pump is represented by P. 入 This refers to the electrical power input to the electronic water pump controller.

[0058] The efficiency of the drive motor can also be obtained using the following formula (5).

[0059] ; (5) in, For the efficiency of the drive motor; P 出 P represents the electrical power output of the electronic water pump controller. 入 This refers to the electrical power input to the electronic water pump controller.

[0060] The above P 出 The power was obtained through a second power analyzer, 132. 入 Pe is obtained by detection using the first power analyzer 131. Pe is calculated using formula (3).

[0061] Similarly, when the drive motor is at the same target speed, by controlling the different output flow rates, the efficiency of the electronic water pump assembly and the efficiency of the drive motor corresponding to different output flow rates of the electronic water pump can be obtained.

[0062] As can be seen, by controlling the drive motor to the same target speed, adjusting the flow regulation module 2 can make the output flow of the electronic water pump different. The processing module 3 can then obtain the head, the efficiency of the electronic water pump control, the efficiency of the electronic water pump assembly, and the efficiency of the drive motor corresponding to different output flow rates.

[0063] Then, the processing module 3 can obtain the flow-head curve, flow-electronic pump assembly efficiency curve, flow-drive motor efficiency curve, and flow-electronic pump controller efficiency curve of the electronic water pump based on the head, efficiency of the electronic water pump control, efficiency of the electronic water pump assembly, and efficiency of the drive motor corresponding to different output flow rates.

[0064] Of course, the above performance data can also include other characteristic curves that reflect the electric water pump, such as the flow rate-electric water pump input power curve, etc.

[0065] Then, the processing module 3 can use the above performance data to confirm whether the electronic water pump control under test meets the requirements.

[0066] When making a judgment, first compare the flow-head curve with the actual operating requirements of the electronic water pump. If the flow-head curve can meet the operating requirements of the electronic water pump, it means that the electronic water pump can work normally.

[0067] The actual operating condition requirements of an electronic water pump are used to describe the performance data of the electronic water pump at a set speed and a set flow rate. The performance data of the electronic water pump includes the lower limit of the head.

[0068] For example, the actual operating requirements of an electronic water pump are: when the drive motor speed is N1 and the output flow rate is Q1, the corresponding head should not be less than H1. In this case, the flow-head curve of the electronic water pump obtained in processing module 3 can be compared with the above conditions. The flow-head curve corresponding to the drive motor speed of N1 can be found, and then compared with the flow-head curve at that speed to see if the head corresponding to the output flow rate of Q1 is greater than H1. If the head is greater than H1, it means the operating requirements of the electronic water pump are met; if the head is less than H1, it means the operating requirements of the electronic water pump are not met. Similar procedures apply to other speeds, and will not be elaborated here.

[0069] Then, based on the premise that the electronic water pump meets the design requirements, further judgment is made through the flow rate-efficiency curve of the electronic water pump assembly, the flow rate-efficiency curve of the drive motor, and the flow rate-efficiency curve of the electronic water pump controller.

[0070] When further evaluating the electronic water pump controller by using the flow rate-electronic water pump assembly efficiency curve, the flow rate-drive motor efficiency curve, and the flow rate-electronic water pump controller efficiency curve, the process of determining whether the electronic water pump controller meets the control requirements is similar to that described above and will not be repeated here.

[0071] The control requirements for the electronic water pump controller describe the performance data of the electronic water pump controller under set speed and flow rate conditions. The performance data includes the lower limit of the drive motor efficiency, the lower limit of the electronic water pump assembly efficiency, and the lower limit of the electronic water pump controller efficiency.

[0072] In other words, if the electronic water pump meets the operating conditions, and the flow-electronic water pump assembly efficiency curve and the flow-electronic water pump controller efficiency curve in the performance data also meet the corresponding efficiency requirements (meet the corresponding lower efficiency limit), then the electronic water pump controller under test meets the control requirements.

[0073] Performance data charts can be found here. Figure 3 As shown. Figure 3 In the diagram, curve A represents the flow rate-head curve when the drive motor speed is N1. Curve B represents the flow rate-electronic pump controller efficiency curve when the drive motor speed is N1. Curve C represents the flow rate-electronic pump assembly efficiency curve when the drive motor speed is N1. Curve D represents the flow rate-drive motor efficiency curve when the drive motor speed is N1.

[0074] First, we use curve A to determine whether the electronic water pump meets the operating requirements. Then, we compare the flow rate and head corresponding to curve A with the flow rate and head in the operating requirements of the electronic water pump.

[0075] If the electric water pump already meets the requirements, then further judgment is made using curves B, C, and D.

[0076] For electronic water pump controllers that meet all the above requirements, when screening, priority should be given to selecting the one with the highest efficiency at a fixed flow rate.

[0077] On the other hand, this disclosure also provides a method for testing the performance of an electronic water pump controller, such as... Figure 4 As shown, the test methods include: S401: Obtain multiple sets of detection values ​​when the electric water pump is at the target speed.

[0078] Each set of test values ​​includes the input power of the electronic water pump controller, the output power of the electronic water pump controller, the output flow rate of the electronic water pump, the water pressure at the inlet of the electronic water pump, and the water pressure at the outlet of the electronic water pump. The output flow rate varies in different sets of test values.

[0079] The target speed is at least one of the speeds corresponding to the drive motor under normal operating conditions.

[0080] In this embodiment, by adjusting the opening degree of the control valve, the electronic water pump can have different output flow rates.

[0081] In other words, by adjusting the opening degree of the control valve (changing the flow area), the electric water pump can have different output flow rates.

[0082] During testing, at a target speed, the control valve opening can be adjusted to 100% fully open to obtain the corresponding test value under the fully open state.

[0083] Then, the opening of the control valve is gradually reduced, for example, to 90%, 80%, 70%, 60%, etc., until the control valve is fully closed. The detection module in the aforementioned test system then obtains multiple sets of detection values ​​for different output flow rates.

[0084] S402: Obtain performance data based on multiple sets of test values.

[0085] Performance data includes at least one of the following: flow-head curve, flow-electronic pump assembly efficiency curve, and flow-electronic pump controller efficiency curve.

[0086] During the calculations, the head, effective power of the electronic water pump, efficiency of the electronic water pump controller, efficiency of the electronic water pump assembly, and efficiency of the drive motor corresponding to different output flow rates are obtained according to formulas (1-5) mentioned above. Based on the above calculations, the corresponding performance data can be obtained, namely the flow rate-head curve, the flow rate-electronic pump assembly efficiency curve, the flow rate-drive motor efficiency curve, and the flow rate-electronic pump controller efficiency curve of the electronic water pump.

[0087] S403: Based on the performance data, determine whether the electronic water pump controller under test meets the control requirements.

[0088] In this embodiment, S403 is implemented in the following manner: 4031: Determine whether the electric water pump meets the operating requirements based on the flow-head curve in the performance data.

[0089] 4032: If the electronic water pump meets the operating conditions, and the flow rate-electronic water pump assembly efficiency curve and the flow rate-electronic water pump controller efficiency curve in the performance data also meet the corresponding efficiency requirements, then the electronic water pump controller under test meets the control requirements.

[0090] When making a judgment, first compare the flow-head curve with the operating requirements of the electronic water pump. If the flow-head curve can meet the operating requirements of the electronic water pump, it means that the electronic water pump can work normally.

[0091] Then, based on the premise that the electronic water pump meets the design requirements, further judgment is made through the flow rate-efficiency curve of the electronic water pump assembly, the flow rate-efficiency curve of the drive motor, and the flow rate-efficiency curve of the electronic water pump controller.

[0092] In other words, if the electronic water pump meets the operating conditions, and the flow-electronic water pump assembly efficiency curve and the flow-electronic water pump controller efficiency curve in the performance data also meet the corresponding efficiency requirements, then the electronic water pump controller under test meets the control requirements.

[0093] Of course, in order to further ensure that the electronic water pump controller meets the testing requirements, the target speed can be different speeds corresponding to the operating conditions, and the number of different speeds can generally be no less than 3.

[0094] In other words, by controlling the drive motor to operate at different target speeds and repeatedly conducting tests, performance data at different speeds can be obtained. This performance data can then be used to test the performance of the electronic water pump controlled by the electronic water pump controller.

[0095] The above description is merely an optional embodiment of this disclosure and is not intended to limit this disclosure. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this disclosure should be included within the protection scope of this disclosure.

Claims

1. A testing system for the performance of an electronic water pump controller, characterized in that, The electronic water pump controller is used to control the rotation of the drive motor of the electronic water pump. The drive motor is used to drive the impeller to rotate, so as to drive the flow of coolant in the cooling system of the car. The testing system includes a detection module (1), a flow regulation module (2), and a processing module (3). The flow regulation module (2) is connected between the electronic water pump and the cooling system and is used to regulate the output flow of the electronic water pump. The detection module (1) is connected between the electronic water pump controller and the electronic water pump, and between the electronic water pump and the cooling system. It is used to obtain multiple sets of detection values ​​when the electronic water pump is at the target speed. Each set of detection values ​​includes the input power of the electronic water pump controller, the output power of the electronic water pump controller, the output flow rate of the electronic water pump, the water pressure at the inlet of the electronic water pump, and the water pressure at the outlet of the electronic water pump. The output flow rates in different sets of detection values ​​are different. The target speed is at least one of the speeds corresponding to the drive motor when it is in normal working condition. The processing module (3) is connected to the detection module (1) and is used to obtain performance data based on the multiple sets of detection values, and to determine whether the electronic water pump controller meets the control requirements based on the performance data. The performance data includes at least one of the flow-head curve, the flow-electronic water pump assembly efficiency curve and the flow-electronic water pump controller efficiency curve.

2. The testing system according to claim 1, characterized in that, The flow regulation module (2) includes a control valve.

3. The testing system according to claim 1, characterized in that, The detection module (1) includes a first pressure sensor (111), a second pressure sensor (112), a flow meter (12), a first power analyzer (131), and a second power analyzer (132). The first pressure sensor (111) is connected to the inlet of the electronic water pump, the second pressure sensor (112) is connected to the outlet of the electronic water pump, and the flow meter (12) is connected to the outlet of the electronic water pump. The first power analyzer (131) is connected to the input terminal of the electronic water pump controller, and the second power analyzer (132) is connected to the output terminal of the electronic water pump controller. The input terminal of the electronic water pump controller is connected to the power supply, and the output terminal of the electronic water pump controller is connected to the electronic water pump.

4. The testing system according to claim 3, characterized in that, The detection module (1) further includes a first temperature sensor (151) and a second temperature sensor (152). The first temperature sensor (151) is connected to the inlet of the electronic water pump, and the second temperature sensor (152) is connected to the outlet of the electronic water pump.

5. The testing system according to any one of claims 1-4, characterized in that, The processing module (3) is used to determine the head of the electronic water pump using the following formula, so as to obtain the flow-head curve based on the head and the corresponding output flow rate: ； Where P1 is the water pressure at the inlet of the electronic water pump; P2 is the water pressure at the outlet of the electronic water pump. ρ is the density of the coolant; g is the acceleration due to gravity.

6. The testing system according to claim 5, characterized in that, The processing module (3) is used to determine the efficiency of the electronic water pump assembly using the following formula, so as to obtain the flow rate-electronic water pump assembly efficiency curve based on the efficiency of the electronic water pump assembly and the corresponding output flow rate. The electronic water pump assembly includes the electronic water pump and the electronic water pump controller: ； in, denoted as η, where η is the efficiency of the electronic water pump assembly; Q is the output flow rate of the electronic water pump; H is the head of the electronic water pump; and g is the acceleration due to gravity. P is the density of the coolant. 入 This refers to the electrical power input to the electronic water pump controller.

7. The testing system according to any one of claims 1-4, characterized in that, The processing module (3) is used to calculate the efficiency of the electronic water pump controller using the following formula, so as to obtain the flow rate-electronic water pump controller efficiency curve based on the efficiency of the electronic water pump controller and the corresponding output flow rate: ； in, For the efficiency of electronic water pump control; P 出 P represents the electrical power output of the electronic water pump controller. 入 This refers to the electrical power input to the electronic water pump controller.

8. A method for testing the performance of an electronic water pump controller, characterized in that, The electronic water pump controller is used to control the rotation of the drive motor of the electronic water pump. The drive motor drives the impeller to rotate, thereby driving the flow of coolant in the cooling system of the vehicle. The test method includes: Multiple sets of detection values ​​are obtained when the electronic water pump is at the target speed. Each set of detection values ​​includes the input power of the electronic water pump controller, the output power of the electronic water pump controller, the output flow rate of the electronic water pump, the water pressure at the inlet of the electronic water pump, and the water pressure at the outlet of the electronic water pump. The output flow rate is different in different sets of detection values. The target speed is at least one of the speeds corresponding to the drive motor when it is in normal working condition. Based on the multiple sets of detection values, performance data is obtained, including at least one of the flow-head curve, the flow-electronic pump assembly efficiency curve, and the flow-electronic pump controller efficiency curve. Based on the performance data, determine whether the electronic water pump controller meets the control requirements.

9. The test method according to claim 8, characterized in that, The process involves obtaining multiple sets of detection values ​​when the electronic water pump is at the target speed, including: When the electronic water pump is at the target speed, the opening of the control valve connected between the electronic water pump and the cooling system can be adjusted to make the electronic water pump have different output flow rates. When the electronic water pump is at different output flow rates, the input power of the electronic water pump controller, the output power of the electronic water pump controller, the water pressure at the inlet of the electronic water pump, and the water pressure at the outlet of the electronic water pump are obtained respectively.

10. The test method according to claim 8, characterized in that, The step of determining whether the electronic water pump controller meets the control requirements based on the performance data includes: Based on the flow-head curve in the performance data, determine whether the electronic water pump meets the operating requirements; If the electronic water pump meets the operating conditions, and the flow rate-electronic water pump assembly efficiency curve and the flow rate-electronic water pump controller efficiency curve in the performance data also meet the corresponding efficiency requirements, then the electronic water pump controller meets the control requirements.

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