Dual-motor hybrid transmission automatic test method and device

Abstract

The application discloses a kind of dual-motor hybrid transmission automated testing method and device, wherein the dual-motor hybrid transmission automated testing method includes the following steps: after initialization is completed, the demand test condition of input is obtained;According to the demand test condition, the test requirement parameter of dual-motor hybrid transmission is obtained;According to test requirement parameter, transmission control instruction and motor control instruction are generated;The motor control instruction is sent to motor controller, so that motor controller controls the motor of dual-motor hybrid transmission to execute corresponding action;Transmission control instruction is sent to transmission controller, so that transmission controller controls variable speed execution element to execute corresponding action;The first feedback parameter input by test bench and the second feedback parameter of variable speed execution element are obtained;According to first feedback parameter and / or second feedback parameter, the performance of dual-motor hybrid transmission is tested and qualified verification.

Description

Technical Field

[0001] This invention relates to the field of automotive motor and transmission testing, and more particularly to an automated testing method and apparatus for a dual-motor hybrid transmission. Background Technology

[0002] Hybrid transmissions are a type of hybrid drive system that essentially utilizes electric drive to achieve its functions. They offer numerous advantages, including compact structure, environmental friendliness, low fuel consumption, and high power. Compared to automatic transmissions, hybrid transmissions incorporate a complex electric motor and its controller, making offline performance verification of hybrid transmissions particularly crucial. Therefore, this patent provides a detailed overview of the company's automated testing software development strategy for test benches, drawing on the company's dual-motor hybrid transmission project.

[0003] Currently, many companies use manual testing methods for bench calibration of transmission assemblies. This requires on-site testing technicians to have an in-depth understanding of the transmission assembly. Many variables need to be monitored throughout the testing process, and errors in setting calibration values ​​are unacceptable, otherwise irreversible damage may be caused to the transmission assembly or the test bench. Furthermore, there is a possibility of subjective misjudgment when processing test data. Therefore, developing automated testing software is particularly important for the off-line calibration of transmission assemblies. Summary of the Invention

[0004] The main objective of this invention is to provide an automated testing method and apparatus for dual-motor hybrid transmissions, aiming to solve the problems of existing testing methods requiring manual testing and subjective misjudgment during test data processing.

[0005] To achieve the above objectives, the present invention provides an automated testing method for a dual-motor hybrid transmission, comprising the following steps:

[0006] After initialization, obtain the input test conditions.

[0007] The test requirements parameters for the dual-motor hybrid transmission are obtained based on the aforementioned test conditions.

[0008] Generate transmission control commands and motor control commands based on the test requirement parameters;

[0009] The motor control command is sent to the motor controller so that the motor controller controls the motor of the dual-motor hybrid transmission to perform the corresponding action;

[0010] The transmission control command is sent to the transmission controller, so that the transmission controller controls the transmission actuator to perform the corresponding action;

[0011] Acquire the first feedback parameters input from the test bench and the second feedback parameters of the variable speed actuator;

[0012] The performance of the dual-motor hybrid transmission is tested and verified based on the first feedback parameter and / or the second feedback parameter.

[0013] Optionally, after sending the transmission control command to the transmission controller so that the transmission controller controls the transmission actuator to perform the corresponding action, the method further includes:

[0014] Obtain the voltage and temperature values ​​of the motor input from the motor controller;

[0015] The test anomaly handling strategy is determined based on the voltage and temperature values ​​of the motor.

[0016] Optionally, determining the test anomaly handling strategy based on the voltage and temperature values ​​of the motor includes:

[0017] When the voltage value of the motor does not meet the first preset condition and / or the temperature value does not meet the second preset condition, the motor is controlled to stop rotating so as to immediately stop the test;

[0018] When the voltage value of the motor meets the first preset condition and the temperature value meets the second preset condition, the motor is controlled to continue rotating with the current control parameters to continue the test.

[0019] Optionally, the voltage value of the motor is U, and the temperature value of the motor is T;

[0020] The first preset condition includes: 340V≤U≤380V; and / or,

[0021] The second preset condition includes: T≤180℃.

[0022] Optionally, the first feedback parameter of the motor includes at least one of the motor's speed signal, torque signal, control mode, and emergency stop signal; and / or,

[0023] The second feedback parameter of the variable speed actuator includes at least one of the pressure signal of the main oil circuit and the feedback speed signal of the electronic pump.

[0024] Optionally, the step of verifying the performance of the dual-motor hybrid transmission based on the first feedback parameter and / or the second feedback parameter includes:

[0025] When the first feedback parameter does not meet the third preset condition and / or the second feedback parameter does not meet the fourth preset condition, the verification result is determined to be unqualified.

[0026] When the first feedback parameter meets the third preset condition and the second feedback parameter meets the fourth preset condition, the verification result is determined to be qualified.

[0027] Optionally, after determining the verification result as qualified when the first feedback parameter meets the third preset condition and the second feedback parameter meets the fourth preset condition, the method further includes:

[0028] The test conditions, the first feedback parameter, the second feedback parameter, and the pass / fail verification information are associated, and a test report is generated.

[0029] Optionally, the required test conditions include one of the following: break-in test of solenoid valve, performance test of electronic pump, zero-position self-learning test of dual motors, drag torque test under different gears, torque loading performance test of dual motors, and PC test.

[0030] Furthermore, to achieve the above objectives, the present invention also proposes an automated testing device for a dual-motor hybrid transmission. The automated testing device for a dual-motor hybrid transmission includes a transmission controller, a motor controller, a test bench, a host computer, and an automated testing program for a dual-motor hybrid transmission that can run on the host computer. The automated testing program for a dual-motor hybrid transmission is configured to implement the automated testing method for a dual-motor hybrid transmission as described above.

[0031] Optionally, the test bench includes a power supply module, a data acquisition module, and a dynamometer. The power supply module is used to provide a stable voltage to drive the motor to rotate; the data acquisition module is used to collect the main oil circuit pressure signal during the development phase; and the dynamometer is used to measure the motor's speed signal, torque signal, control mode, and emergency stop signal.

[0032] This invention applies the automated testing method for a dual-motor hybrid transmission to automated testing equipment. The automated testing method includes: after initialization, acquiring the input required test conditions; acquiring test requirement parameters for the dual-motor hybrid transmission based on the required test conditions; generating transmission control commands and motor control commands based on the test requirement parameters; sending the motor control commands to the motor controller, so that the motor controller controls the motors of the dual-motor hybrid transmission to perform corresponding actions; sending the transmission control commands to the transmission controller, so that the transmission controller controls the transmission actuators to perform corresponding actions; acquiring first feedback parameters input from the test bench and second feedback parameters of the transmission actuators; and verifying the performance of the dual-motor hybrid transmission based on the first feedback parameters and / or the second feedback parameters. This solution only requires the user to click on the test conditions on the host computer's operating interface, allowing the host computer to acquire the required test conditions. The host computer then automatically performs the above steps to complete the automated testing of the dual-motor hybrid transmission and obtain the test verification results. The test can be completed simply by clicking the test button, which not only improves testing efficiency and accuracy but also saves labor costs. Attached Figure Description

[0033] Figure 1 This is a flowchart illustrating the first embodiment of the automated testing method for a dual-motor hybrid transmission of the present invention.

[0034] Figure 2 This is a flowchart illustrating the second embodiment of the automated testing method for a dual-motor hybrid transmission of the present invention.

[0035] Figure 3 This is a flowchart illustrating the third embodiment of the automated testing method for dual-motor hybrid transmissions of the present invention.

[0036] Figure 4 This is a flowchart illustrating the fourth embodiment of the automated testing method for dual-motor hybrid transmissions of the present invention.

[0037] Figure 5 This is a flowchart illustrating the fifth embodiment of the automated testing method for dual-motor hybrid transmissions of the present invention.

[0038] Figure 6 This is a schematic diagram of the user interface of the automated test program for the dual-motor hybrid transmission of the present invention.

[0039] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0040] It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the scope of the invention.

[0041] This invention provides an automated testing method and apparatus for dual-motor hybrid transmissions, aiming to solve the problems of existing testing methods requiring manual testing and subjective misjudgment during test data processing.

[0042] The automated testing device for the dual-motor hybrid transmission may include: a transmission controller, a motor controller, a test bench, a host computer, and an automated testing program for the dual-motor hybrid transmission that can run on the host computer.

[0043] Those skilled in the art will understand that the above-described structure does not constitute a limitation on the automated testing device for the dual-motor hybrid transmission, and may include more or fewer components than described above, or combine certain components, or have different component arrangements.

[0044] Furthermore, the test bench includes a power supply module, a data acquisition module, and a dynamometer. The power supply module provides a stable voltage to drive the motor. The data acquisition module collects the main oil circuit pressure signal during the development phase. The dynamometer measures the motor's speed, torque, control mode, and emergency stop signal. In this embodiment, the test bench also includes a battery simulator, a low-voltage DC power supply, and a water chiller. The battery simulator provides high-voltage electricity to the transmission, with a maximum output of 500V and 120A. The low-voltage DC power supply powers the transmission controller, the motor controller, the electronic oil pump, and the data acquisition module. The water chiller cools the inverter and transmission body to prevent overheating, which could lead to malfunctions or abnormalities and affect parameter acquisition.

[0045] The automated testing method for the dual-motor hybrid transmission includes the following steps:

[0046] Step S10: After initialization, obtain the input requirements test conditions.

[0047] It should be noted that, as Figure 4 As shown, the first step of the test requires the user to click the initialization button on the operation interface to restore all devices to their initial state, so as to avoid the previous test affecting the results of this test. Then, the user clicks the corresponding test condition button according to the test conditions required for the test, and the host computer obtains the input of the required test conditions.

[0048] In a specific embodiment, the required test conditions include one of the following: solenoid valve break-in test, electronic pump performance test, dual motor zero-position self-learning test, drag torque test at different gears, dual motor torque loading performance test, and PC test.

[0049] Step S20: Obtain the test requirement parameters for the dual-motor hybrid transmission according to the aforementioned test conditions.

[0050] It should be noted that each test condition has preset test parameters for the dual-motor hybrid transmission. Users can retrieve the corresponding test parameters by clicking the test condition button. These test parameters include, but are not limited to, main oil circuit pressure, clutch engagement, electric pump speed, electronic parking brake, and motor speed and torque parameters.

[0051] Step S30: Generate gearbox control commands and motor control commands based on the test requirement parameters.

[0052] Step S40: Send the motor control command to the motor controller so that the motor controller controls the motor of the dual-motor hybrid transmission to perform the corresponding action.

[0053] Step S50: Send the transmission control command to the transmission controller so that the transmission controller controls the transmission actuator to perform the corresponding action.

[0054] It should be noted that in this embodiment, the gearbox controller and the motor controller need an ETK interface to communicate. Therefore, the ES592 with an ETK interface is selected as the bus module to communicate with the host computer, so as to realize the communication between the host computer and the gearbox controller and the motor controller.

[0055] Since communication with the host computer is established using ES592, INCA software is necessary. As a commonly used ECU calibration tool, INCA can interface with other test platforms and HIL systems, has comprehensive testing and calibration functions, supports protocols such as CCP or XCP, can manage calibration parameters, and can be used for data acquisition, calibration, ECU flash programming, and Prof integration. It is very powerful. However, INCA software itself does not support automated program development. Considering that Matlab can support interaction with the INCA software ETK module through the MIP plugin, it was decided to use Matlab to develop the host computer software. The INCA-MIP (INCA MATALB Integration Package) plugin is used as an application programming interface, which allows MATLAB to control the functions of INCA. MATLAB is the client and INCA is the server to control the gearbox controller and the motor controller.

[0056] Step S80: Obtain the first feedback parameter input from the test bench and the second feedback parameter of the speed-changing actuator.

[0057] In specific implementations, the first feedback parameter includes at least one of the motor speed signal, torque signal, control mode, and emergency stop signal; and / or, the second feedback parameter of the transmission actuator includes at least one of the main oil circuit pressure signal and the feedback speed signal of the electronic pump. The first and second feedback parameters are not limited to the above parameters, and other acquisition parameters can be added according to actual needs.

[0058] In this embodiment, the pressure signal of the main oil circuit is acquired by the data acquisition module of the test bench. The data acquisition module of the test bench is MSE-E301X, which can acquire 16 channels of analog signals. The voltage signal is transmitted to the host computer via Ethernet. Then, the voltage signal is read using the UDP protocol in C# in Visual Studio, and then the signal is parsed and converted into a pressure signal. The pressure signal is then converted into a CAN signal and sent to the CAN port of ES592 via a CAN bus analyzer and recorder, so that the host computer can directly read the pressure signal acquired by the data acquisition module.

[0059] The data acquisition module may experience fluctuations when collecting main oil circuit pressure signals. There are generally two solutions. The first is to address the grounding issue. While data acquisition equipment and sensors are typically matched one-to-one, during project implementation, a mismatch may occur between the power supply voltage from the data acquisition module to the sensor and the sensor's operating voltage. For example, the data acquisition module might provide 24V, but the sensor requires 12V. In this case, a separate external power supply is needed for the sensor. If this happens, it is crucial to connect the ground wire of the external power supply to the ground wire of the data acquisition equipment. This significantly reduces power supply interference. The second solution is to solder a matching capacitor to the sensor's signal lines, based on the data acquisition equipment's sampling period and the sensor's accuracy, to absorb external interference.

[0060] Step S90: Perform a performance test and verification of the dual-motor hybrid transmission based on the first feedback parameter and / or the second feedback parameter.

[0061] In practice, the first feedback parameter and the second feedback parameter are compared with preset conditions to verify whether the performance of the dual-motor hybrid transmission is qualified, and different processing strategies are adopted for the verification results.

[0062] This invention applies the automated testing method for a dual-motor hybrid transmission to automated testing equipment. The automated testing method includes: after initialization, acquiring the input required test conditions; acquiring test requirement parameters for the dual-motor hybrid transmission based on the required test conditions; generating transmission control commands and motor control commands based on the test requirement parameters; sending the motor control commands to the motor controller, so that the motor controller controls the motors of the dual-motor hybrid transmission to perform corresponding actions; sending the transmission control commands to the transmission controller, so that the transmission controller controls the transmission actuators to perform corresponding actions; acquiring first feedback parameters input from the test bench and second feedback parameters of the transmission actuators; and verifying the performance of the dual-motor hybrid transmission based on the first feedback parameters and / or the second feedback parameters. This solution only requires the user to click on the test conditions on the host computer's operating interface, allowing the host computer to acquire the required test conditions. The host computer then automatically performs the above steps to complete the automated testing of the dual-motor hybrid transmission and obtain the test verification results. The test can be completed simply by clicking the test button, which not only improves testing efficiency and accuracy but also saves labor costs.

[0063] refer to Figure 2 , Figure 2 This is a flowchart illustrating the second embodiment of the automated testing method for dual-motor hybrid transmissions of the present invention.

[0064] Based on the first embodiment described above, the automated testing method for the dual-motor hybrid transmission in this embodiment further includes, after step S50:

[0065] Step S60: Obtain the voltage and temperature values ​​of the motor input by the motor controller.

[0066] It should be noted that the motor controller has a built-in sensor that can collect the voltage and temperature values ​​of the motor in real time and input them to the host computer via ES592.

[0067] In this embodiment, the order of steps S60 and S80 is not limited, and the two steps can be performed simultaneously.

[0068] Step S70: Determine the test anomaly handling strategy based on the voltage and temperature values ​​of the motor.

[0069] It should be noted that by comparing the collected voltage and temperature values ​​of the motor with preset conditions, it can be used to determine whether the test is abnormal. In this embodiment, the temperature values ​​of the electronic oil pump and the gearbox can also be used to determine abnormal parameters.

[0070] refer to Figure 3 , Figure 3 This is a flowchart illustrating the third embodiment of the automated testing method for dual-motor hybrid transmissions of the present invention.

[0071] Based on the second embodiment described above, the automated testing method for the dual-motor hybrid transmission in this embodiment includes the following in step S70:

[0072] Step S71: When the voltage value of the motor does not meet the first preset condition and / or the temperature value does not meet the second preset condition, control the motor to stop rotating so as to immediately stop the test.

[0073] In this embodiment, the voltage value of the motor is U, and the temperature value of the motor is T; the first preset condition includes: 340V≤U≤380V; and / or, the second preset condition includes: T≤180℃.

[0074] Step S72: When the voltage value of the motor meets the first preset condition and the temperature value meets the second preset condition, control the motor to continue rotating with the current control parameters to continue the test.

[0075] It should be noted that when the voltage value of the motor meets the first preset condition and the temperature value meets the second preset condition, the test process is normal. Therefore, the host computer controls the motor to continue rotating with the current control parameters to continue the test.

[0076] refer to Figure 4 , Figure 4 This is a flowchart illustrating the fourth embodiment of the automated testing method for dual-motor hybrid transmissions of the present invention.

[0077] Based on the first embodiment described above, the automated testing method for the dual-motor hybrid transmission in this embodiment includes the following in step S90:

[0078] Step S91: When the first feedback parameter does not meet the third preset condition and / or the second feedback parameter does not meet the fourth preset condition, the verification result is determined to be unqualified.

[0079] It should be noted that after the host computer completes the test for each working condition, it will automatically save the first feedback parameter and the second feedback parameter, and then automatically extract the value of the collection parameter to be evaluated from the first feedback parameter and the second feedback parameter. Then, the host computer will specify preset conditions. The third preset conditions and the fourth preset conditions will change accordingly according to different test working conditions. The specific conditions shall be based on actual needs.

[0080] In this embodiment, when the verification result is determined to be unqualified, the host computer will automatically generate an error report, which indicates which feedback parameters are unqualified, so as to facilitate troubleshooting, and then the test condition will be re-performed.

[0081] Step S92: When the first feedback parameter meets the third preset condition and the second feedback parameter meets the fourth preset condition, the verification result is determined to be qualified.

[0082] In this embodiment, when the verification result is qualified, it means that the test condition has been successfully completed. After that, the user can click the button for the next test condition to perform the test for the next test condition.

[0083] refer to Figure 5 , Figure 5 This is a flowchart illustrating the fifth embodiment of the automated testing method for dual-motor hybrid transmissions of the present invention.

[0084] Based on the fourth embodiment described above, the automated testing method for the dual-motor hybrid transmission in this embodiment further includes, after step S92:

[0085] Step S93: Associate the required test conditions, the first feedback parameter, the second feedback parameter, and the pass / fail verification information, and generate a test report.

[0086] In practice, after all test conditions are completed, the corresponding first feedback parameter, second feedback parameter, and pass / fail verification information are automatically filled in according to the required test conditions and required parameters in the test report template to generate the final test report.

[0087] It should be understood that the above are merely illustrative examples and do not constitute any limitation on the technical solutions of the present invention. In specific applications, those skilled in the art can make settings as needed, and the present invention does not impose any restrictions on this.

[0088] It should be noted that the workflow described above is merely illustrative and does not limit the scope of protection of this invention. In practical applications, those skilled in the art can select some or all of the workflow to achieve the purpose of this embodiment according to actual needs, and no restrictions are imposed here.

[0089] Furthermore, it should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or system that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or system. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or system that includes that element.

[0090] The sequence numbers of the above embodiments of the present invention are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments.

[0091] Through the above description of the embodiments, those skilled in the art can clearly understand that the methods of the above embodiments can be implemented by means of software plus necessary general-purpose hardware platforms. Of course, they can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product is stored in a storage medium (such as read-only memory (ROM) / RAM, magnetic disk, optical disk) and includes several instructions to cause a terminal device (which may be a mobile phone, computer, server, or network device, etc.) to execute the methods described in the various embodiments of the present invention.

[0092] The above are merely preferred embodiments of the present invention and do not limit the scope of the patent. Any equivalent structural or procedural transformations made based on the description and drawings of the present invention, or direct or indirect applications in other related technical fields, are similarly included within the scope of patent protection of the present invention.

Claims

1. An automated testing method for a dual-motor hybrid transmission, characterized in that, Includes the following steps: After initialization, obtain the input test conditions. The test requirements parameters for the dual-motor hybrid transmission are obtained based on the aforementioned test conditions. Generate transmission control commands and motor control commands based on the test requirement parameters; The motor control command is sent to the motor controller so that the motor controller controls the motor of the dual-motor hybrid transmission to perform the corresponding action; The transmission control command is sent to the transmission controller, so that the transmission controller controls the transmission actuator to perform the corresponding action; Acquire the first feedback parameters input from the test bench and the second feedback parameters of the variable speed actuator; The performance of the dual-motor hybrid transmission is tested and verified based on the first feedback parameter and / or the second feedback parameter. The first feedback parameter includes at least one of the motor speed signal, torque signal, control mode, and emergency stop signal; the second feedback parameter of the transmission actuator includes at least one of the main oil circuit pressure signal and the feedback speed signal of the electronic pump. The test and verification of the performance of the dual-motor hybrid transmission based on the first feedback parameter and / or the second feedback parameter includes: when the first feedback parameter does not meet the third preset condition and / or the second feedback parameter does not meet the fourth preset condition, the verification result is determined to be unqualified. When the first feedback parameter meets the third preset condition and the second feedback parameter meets the fourth preset condition, the verification result is determined to be qualified.

2. The automated testing method for a dual-motor hybrid transmission as described in claim 1, characterized in that, After sending the transmission control command to the transmission controller so that the transmission controller controls the transmission actuator to perform the corresponding action, the method further includes: Obtain the voltage and temperature values ​​of the motor input from the motor controller; The test anomaly handling strategy is determined based on the voltage and temperature values ​​of the motor.

3. The automated testing method for a dual-motor hybrid transmission as described in claim 2, characterized in that, The step of determining the test anomaly handling strategy based on the voltage and temperature values ​​of the motor includes: When the voltage value of the motor does not meet the first preset condition and / or the temperature value does not meet the second preset condition, the motor is controlled to stop rotating so as to immediately stop the test; When the voltage value of the motor meets the first preset condition and the temperature value meets the second preset condition, the motor is controlled to continue rotating with the current control parameters to continue the test.

4. The automated testing method for a dual-motor hybrid transmission as described in claim 3, characterized in that, The voltage value of the motor is U, and the temperature value of the motor is T; The first preset condition includes: 340V≤U≤380V; and / or, The second preset condition includes: T≤180℃.

5. The automated testing method for a dual-motor hybrid transmission as described in claim 1, characterized in that, After determining that the verification result is qualified when the first feedback parameter meets the third preset condition and the second feedback parameter meets the fourth preset condition, the method further includes: The test conditions, the first feedback parameter, the second feedback parameter, and the pass / fail verification information are associated, and a test report is generated.

6. The automated testing method for a dual-motor hybrid transmission as described in claim 1, characterized in that, The required test conditions include one of the following: solenoid valve break-in test, electronic pump performance test, dual motor zero-position self-learning test, drag torque test at different gears, dual motor torque loading performance test, and PC test.

7. An automated testing device for a dual-motor hybrid transmission, characterized in that, include: The system includes a transmission controller, a motor controller, a test bench, a host computer, and an automated test program for a dual-motor hybrid transmission that can run on the host computer, the automated test program for the dual-motor hybrid transmission being configured to implement the automated test method for a dual-motor hybrid transmission as described in any one of claims 1 to 6.

8. The automated testing device for a dual-motor hybrid transmission as described in claim 7, characterized in that, The test bench includes: The power supply module provides a stable voltage to drive the motor to rotate; The data acquisition module is used to collect the main oil circuit pressure signal during the development phase; A dynamometer is used to measure the motor's speed signal, torque signal, control mode, and emergency stop signal.

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