A hybrid automatic transmission bench calibration test method, test system and device

Abstract

The application discloses a hybrid automatic transmission bench calibration test method, a test system and a device, and the method steps comprise: detecting whether an HCU control model is included in a bench master control machine system of a hybrid automatic transmission bench; according to the detection result of whether the HCU control model is included in the bench master control machine system, different calibration test methods are adopted, and the calibration test methods comprise a first calibration test method and a second calibration test method; and according to the first and second test methods, power distribution test and energy recovery test are carried out. The hybrid automatic transmission bench test method, the test system and the device provided by the application can realize the bench calibration test of the hybrid automatic transmission, save cost, improve efficiency, improve product quality and shorten the product development cycle.

Description

TECHNICAL FIELD

[0001] The application relates to a test method, a test system and a test device, in particular to a hybrid automatic transmission bench test method, a test system and a test device. BACKGROUND

[0002] With the rapid development of domestic new energy automobile technology, the market share is increasing. As a new star of new energy transmission, the hybrid automatic transmission gradually opens its own flash point. The hybrid automatic transmission combines the functions of the traditional transmission and the intelligence of the automatic transmission, adds a multi-power hybrid, and realizes the no-power interruption shifting function, providing a smoother driving experience. However, due to the coupling of multiple powers, the control strategy is more complex, not only the torque distribution of each power source needs to be calculated, but also the best working interval of the engine needs to be considered. However, the bench calibration technology of the hybrid automatic transmission is relatively scarce and cannot meet people's requirements, and needs to be improved. SUMMARY

[0003] The application aims to provide a hybrid automatic transmission bench test method, a test system and a device. The first technical problem to be solved is that the HCU control model can be input into the host computer to directly calibrate the bench. The second technical problem to be solved is that the functional test of each component and assembly of the hybrid automatic transmission can be performed in advance without the HCU control model. Finally, the cost and time of the hybrid transmission test process are saved, and the product development cycle is shortened.

[0004] The application provides the following scheme:

[0005] A hybrid automatic transmission bench calibration test method applied to a hybrid automatic transmission bench calibration test system, comprising:

[0006] Detecting whether the HCU control model is included in the bench host computer system of the hybrid automatic transmission bench, and according to the detection result of whether the HCU control model is included in the bench host computer system, different calibration test methods are adopted, wherein the calibration test methods include a first calibration test method and a second calibration test method;

[0007] If it is detected that the HCU control model is included in the bench host computer system of the hybrid automatic transmission, the first calibration test method is adopted, and the first calibration test method is configured to first detect a sensor, obtain a first detection result according to the feedback signal of the sensor, and perform a corresponding first test means;

[0008] If it is detected that the HCU control model is not included in the bench master system of the hybrid automatic transmission, the second calibration test method is adopted, and the second calibration test method is configured to first detect the communication interface of the bench master system, and according to the second detection result obtained by detecting the communication interface, a second test means is executed;

[0009] According to the first and second test means, power distribution test and energy recovery test are performed.

[0010] Further, the first calibration test method is configured to first detect sensors, in particular:

[0011] Detect whether the feedback signals of each sensor of the hybrid automatic transmission assembly are accurate, and if the sensor feedback signals are accurate, perform clutch calibration to determine the clutch engagement point, clutch displacement, and torque corresponding curve, and correct the clutch temperature variation parameter or curve;

[0012] After the clutch calibration is completed, shift calibration is performed, and the shift calibration is performed according to the shift time requirement, shift vibration, shift speed point correction table, shift air pressure or shift current, voltage correction, and HCU control model shift PID parameter calibration;

[0013] After completing the clutch calibration, power distribution is performed, and the engine and motor power output ratio is controlled according to the HCU control model and engine power characteristic table.

[0014] Further, the detection of the feedback signals of each sensor of the hybrid automatic transmission assembly is accurate, in particular: if the feedback signals of the sensor are detected to be inaccurate, enter the sensor problem judgment module;

[0015] The second calibration test method is configured to first detect the communication interface of the bench master system, and in particular: if it is detected that the communication interface is configured incorrectly, the communication interface is reconfigured and the test is re-performed.

[0016] Further, it also includes wire harness inspection, if it is detected that the wire harness has a fault, the wire harness is replaced and the test is restarted, or: if it is found that the wire harness has no fault, it is judged that the motor has a fault.

[0017] Further, the second calibration test method is configured to first detect the communication interface of the bench master system, and in particular:

[0018] The communication interface is configured, and after the configuration is completed, the clutch test work is entered to determine the clutch engagement point, clutch displacement, and torque corresponding curve, and obtain the clutch torque variation curve with temperature;

[0019] The clutch test is completed, the shift test is entered, the shift action is performed through the signal control actuator, and whether the shift actuator works correctly is judged.

[0020] After the shift test is completed, the power distribution test is entered, the power distribution ratio is calculated according to the preset formula, and whether the torque is correctly output in the shift test process is judged according to the action of the engine or the motor.

[0021] Further, the preset formula includes:

[0022] The first formula:

[0023] The second formula:

[0024] The third formula:

[0025] The fourth formula:

[0026] The fifth formula:

[0027] Wherein: T 总 is the total input torque of the development target, T1 is the rated torque of the first motor, T2 is the rated torque of the second motor, T3 is the rated torque of the engine, X1 is the torque distribution ratio of the first motor, X2 is the torque distribution ratio of the second motor, X3 is the torque distribution ratio of the engine, n max is the maximum speed of the engine, i1 is the speed ratio of the engine and the first motor, i2 is the speed ratio of the engine and the second motor, P1 is the rated power of the first motor, P2 is the rated power of the second motor, and P3 is the rated power of the engine.

[0028] Further, whether the torque is correctly output in the shift test process is judged according to the action of the engine or the motor, specifically:

[0029] Whether the torque is correctly output in the shift test process is judged according to the action of the engine or the motor.

[0030] A hybrid automatic transmission bench calibration test system for realizing the hybrid automatic transmission bench calibration test method, comprising:

[0031] The HCU control model detection module detects whether the HCU control model is included in the bench master control system of the hybrid automatic transmission bench, and according to the detection result of whether the HCU control model is included in the bench master control system, different calibration test methods are adopted, and the calibration test method includes a first calibration test method and a second calibration test method;

[0032] ​​​​​The first / second calibration test method selection module adopts the first calibration test method if it is detected that the HCU control model is included in the bench master control system of the hybrid automatic transmission, and the first calibration test method is configured to first detect a sensor, obtain a first detection result according to a feedback signal of the sensor, and perform a corresponding first test means;

[0033] The second calibration test method is adopted if it is detected that the HCU control model is not included in the bench master control system of the hybrid automatic transmission, and the second calibration test method is configured to first detect a communication interface of the bench master control system, perform a second test means according to a second detection result obtained by detecting the communication interface;

[0034] The power distribution / energy recovery test module is configured to perform power distribution test and energy recovery test according to the first / second test means.

[0035] A hybrid automatic transmission bench calibration test device for implementing the hybrid automatic transmission bench calibration test method, comprising a bench input motor, an input speed and torque sensor, a clutch assembly, a hybrid automatic transmission assembly, an output speed and torque sensor, a bench output motor, a battery simulator, an oil temperature control unit, a water temperature control unit, and a bench master control machine, wherein:

[0036] The bench master control machine is configured to configure an HCU control model.

[0037] The bench input motor is configured to simulate the output power of an engine.

[0038] The bench output motor is configured to simulate the output power of the hybrid automatic transmission.

[0039] The input speed and torque sensor is configured to detect the input speed and torque of the hybrid automatic transmission.

[0040] The output speed and torque sensor is configured to detect the output speed and torque of the hybrid automatic transmission.

[0041] The bench master control machine is connected to the bench input motor, the input speed and torque sensor, the clutch assembly, the hybrid automatic transmission assembly, the output speed and torque sensor, and the bench output motor, respectively.

[0042] The input speed and torque sensor is connected between the bench input motor and the clutch assembly, and the output speed and torque sensor is connected between the hybrid automatic transmission assembly and the bench output motor.

[0043] Further, the battery simulator, the water temperature control unit, and the oil temperature control unit are connected to the hybrid automatic transmission assembly, respectively.

[0044] Compared with the prior art, the present application has the following advantages:

[0045] The hybrid automatic transmission bench test method, test system and device provided by the present application can realize the bench calibration test of the hybrid automatic transmission, save cost, improve efficiency, improve product quality and shorten the product development cycle.

[0046] The hybrid automatic transmission tested by the calibration test method of the present application will also be significantly improved in product quality. Through the calibration test using the hybrid automatic transmission bench, potential problems can be found early and solved in the product design stage. Through simulation of various conditions and load requirements under real road conditions, the bench can comprehensively evaluate the transmission performance to ensure that key indicators such as stability, durability and safety meet the expected target. BRIEF DESCRIPTION OF DRAWINGS

[0047] In order to more clearly illustrate the technical solutions in the specific embodiments or the prior art of the present application, the drawings needed in the specific embodiments or prior art description will be briefly introduced as follows. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0048] Figure 1 is a flowchart of the hybrid automatic transmission bench calibration test method.

[0049] Figure 2 is an architecture diagram of the hybrid automatic transmission bench calibration test system.

[0050] Figure 3 is a flowchart of the first and second calibration test methods.

[0051] Figure 4 is a flowchart of the first and second calibration test methods (with motor fault detection).

[0052] Figure 5 is a structure diagram of the hybrid automatic transmission bench calibration test device. DETAILED DESCRIPTION

[0053] The technical solutions of the present application will be described in detail below with reference to the drawings. Obviously, the described embodiments are part of the embodiments of the present application, not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0054] As Figure 1The hybrid automatic transmission bench calibration test method shown is applied to a hybrid automatic transmission bench calibration test system, and comprises:

[0055] Step S1, detecting whether the HCU control model is included in the bench master control system of the hybrid automatic transmission bench, and according to the detection result of whether the HCU control model is included in the bench master control system, different calibration test methods are adopted, which include a first calibration test method and a second calibration test method;

[0056] Step S2, if it is detected that the HCU control model is included in the bench master control system of the hybrid automatic transmission, the first calibration test method is adopted, which is configured to first detect the sensor, obtain the first detection result according to the feedback signal of the sensor, and perform the corresponding first test means;

[0057] Step S3, if it is detected that the HCU control model is not included in the bench master control system of the hybrid automatic transmission, the second calibration test method is adopted, which is configured to first detect the communication interface of the bench master control system, and according to the second detection result obtained by detecting the communication interface, the second test means is executed.

[0058] Step S4, according to the first and second test means, power distribution test and energy recovery test are performed.

[0059] Steps S1 to S4 describe the calibration test method for hybrid automatic transmission bench test, and the core of the technical solution provided by steps S1 to S4 is to select different test strategies according to whether the HCU (Hybrid Control Unit) control model is included in the bench master control system to ensure the accuracy and efficiency of the test.

[0060] Through steps S1 to S4, it can be detected whether the HCU control model is included in the bench master control system to determine which calibration test method to use, that is, to execute specific test means through sensor detection and feedback signal or to detect the communication interface of the bench master control system, and to execute corresponding test means according to the detection result.

[0061] Steps S1 to S4 improve the pertinence and accuracy of the test by distinguishing whether the HCU control model is included. The first calibration test method focuses on sensor detection, ensuring the accuracy of sensor feedback and providing reliable data for subsequent power distribution and energy recovery tests. The second calibration test method focuses on the detection of the communication interface, ensuring the stability and reliability of data transmission, and also providing support for power distribution and energy recovery tests.

[0062] The first and second calibration test methods can comprehensively evaluate the power distribution efficiency and energy recovery capability of the hybrid automatic transmission, thereby optimizing the transmission performance and improving the energy utilization efficiency.

[0063] Preferably, in step S2, the first calibration test method is configured to first detect sensors, in particular:

[0064] whether the feedback signals of the sensors of the hybrid automatic transmission assembly are accurate, and if the feedback signals of the sensors are accurate, to calibrate the clutch to determine the clutch engagement point, clutch displacement, and torque corresponding curve, and to correct the clutch temperature variation parameter or curve;

[0065] After the clutch calibration is completed, shift calibration is performed, and the shift time requirement, shift vibration, shift speed point correction table (sound feedback to shift speed point correction table correction), shift air pressure or shift current, voltage correction, and HCU control model shift PID parameter are calibrated;

[0066] After the clutch calibration is completed, power distribution is performed, and the HCU control model and engine power characteristic table are used to control the power output ratio of the engine and the motor. The output of the motor cannot exceed the upper limit of the power, speed, and torque of the motor. After the power distribution calibration is completed, the energy recovery logic block is entered, the engine is simulated by the bench input motor, the motor is focused, and the power recovery efficiency is measured.

[0067] For example, the detection of whether the feedback signals of the sensors of the hybrid automatic transmission assembly are accurate is specifically: if the feedback signals of the sensors are detected to be inaccurate, the sensor problem determination module is entered;

[0068] The second calibration test method is configured to first detect the communication interface of the bench host computer system, and specifically: if the communication interface is detected to be incorrectly configured, the communication interface is reconfigured and the test is reperformed.

[0069] In the optimization technical solution of step S2, the application scenario is that the HCU control model is included in the bench host computer. In this scenario, the first calibration test method is performed, and the optimization technical solution of step S2 can ensure that the performance of the clutch and the shift system is optimal, and the power distribution and energy recovery efficiency are optimized.

[0070] By performing sensor detection, the accuracy of the sensor feedback signals of the hybrid automatic transmission assembly is ensured, providing basic data for subsequent calibration. By calibrating the clutch, the corresponding curves of the clutch engagement point, displacement and torque are determined, and the parameter changes caused by temperature changes are corrected. Based on the shift calibration according to the shift performance requirements, the shift time, vibration, speed point, air pressure or current, voltage and shift PID parameters in the HCU are calibrated. According to the HCU control model and the engine characteristics, the power distribution is performed to control the power output ratio of the engine and the motor, ensuring that the upper limit of the power, speed and torque of the motor is not exceeded. The power recovery efficiency is measured by simulating the engine to test the motor.

[0071] The optimization technical solution of step S2 improves the accuracy of sensor data, provides reliable input for the calibration of the clutch and shift system, optimizes the performance of the clutch to ensure its stability and reliability under different temperature conditions, improves the smoothness and response speed of the shift through shift calibration, and reduces vibration and noise during the shift process. The power distribution calibration ensures the cooperative work of the engine and the motor, improves the power output efficiency, and avoids overloading of the motor. The energy recovery test improves the energy utilization efficiency of the hybrid system, which helps to reduce energy consumption and improve the performance of the whole vehicle.

[0072] Additionally, it also includes wire harness inspection. If a fault is detected in the wire harness, the wire harness is replaced and the test is restarted, or if no fault is found in the wire harness, it is determined that the motor is faulty.

[0073] Preferably, in step S3, the second calibration test method is configured to first detect the communication interface of the test bench host system, specifically:

[0074] The communication interface is configured, and after the configuration is completed, the clutch test is performed to determine the clutch engagement point, clutch displacement and torque corresponding curve, and obtain the clutch torque transmission curve with temperature change;

[0075] After the clutch test is completed, the shift test is performed, the shift actuator is controlled by the signal to perform the shift action, and it is determined whether the shift actuator works correctly;

[0076] After the shift test is completed, the power test is performed, the power distribution ratio is calculated according to the preset formula, and it is determined whether the torque is output correctly during the shift test according to the action of the engine or the motor.

[0077] Illustratively, the preset formula includes:

[0078] The first formula is: ;

[0079] The second formula is: ;

[0080] Third formula: ;

[0081] Fourth formula: ;

[0082] Fifth formula: ;

[0083] Where: T 总 is the total input torque of the development target, T1 is the rated torque of the first motor, T2 is the rated torque of the second motor, T3 is the rated torque of the engine, X1 is the torque distribution ratio of the first motor, X2 is the torque distribution ratio of the second motor, X3 is the torque distribution ratio of the engine, n max is the maximum speed of the engine, i1 is the speed ratio of the engine to the first motor, i2 is the speed ratio of the engine to the second motor, P1 is the rated power of the first motor, P2 is the rated power of the second motor, and P3 is the rated power of the engine.

[0084] For example, according to the action of the engine or motor, it is judged whether the torque is correctly output during the shift test process, specifically: according to the action of the engine or motor, the engine (test bench input motor) or motor is controlled through a signal to determine whether the torque is correctly output during the shift test process according to the preset torque.

[0085] The optimization technical solution of step S3 describes a second calibration test method when the HCU control model is not included in the test bench host computer system. The second calibration test method focuses on the detection of the communication interface and the test of the clutch, shift and power distribution to ensure that the hybrid automatic transmission can still achieve accurate control and performance in the absence of the HCU control model.

[0086] The optimization technical solution of step S3 first configures and detects the communication interface of the test bench host computer system to ensure the accuracy and stability of data transmission. After the communication interface configuration is completed, the clutch test is performed to determine the clutch engagement point, displacement and torque corresponding curve, and obtain the clutch torque transmission curve with temperature change. Then, the shift actuator is controlled through a signal to determine whether the shift actuator works correctly to ensure the accuracy of the shift process. Finally, the power distribution ratio is calculated according to the preset formula, and the correctness of the torque output during the shift test process is verified according to the action of the engine or motor.

[0087] The optimization technical solution of step S3 improves the communication stability, improves the stability of data transmission through the detection and configuration of the communication interface, provides a reliable communication foundation for subsequent testing, and further optimizes the performance of the clutch. Through the clutch test, the performance of the clutch can be optimized to ensure its stability and reliability under different temperature conditions.

[0088] The optimization technical solution of step S3 improves the gear shifting accuracy, ensures the correct operation of the gear shifting actuator, improves the gear shifting accuracy and response speed, and improves the power distribution accuracy, and through the preset formula and actual action verification, the accuracy of the power output is ensured, and the overall performance of the hybrid automatic transmission is improved.

[0089] The optimization technical solution of step S3 solves the problem of how to ensure the accuracy and reliability of the clutch, gear shifting and power distribution system of the hybrid automatic transmission without the support of the HCU control model through a series of meticulous test steps, thereby achieving the technical effects of improving the system performance and stability.

[0090] For the method steps disclosed in the above embodiments, the method steps are described as a series of action combinations for the purpose of simple description, but those skilled in the art should know that the embodiments of the present application are not limited by the described action sequence, because according to the embodiments of the present application, certain steps can be performed in other order or simultaneously. Secondly, those skilled in the art should know that the embodiments described in the specification all belong to preferred embodiments, and the actions involved are not necessarily necessary for the embodiments of the present application.

[0091] Any process or method described in a flowchart or otherwise described can be understood as a representation of code, a module, a segment or a portion of code comprising executable instructions for implementing specific logic functions or steps, and the scope of the preferred embodiments of the present application includes additional implementations in which the order of the steps shown or discussed can not be followed, including performing functions according to the functions involved in a substantially simultaneous manner or in reverse order, or executing computer instructions and implementing corresponding functions according to loop, branch, etc. Program structure, which is naturally understood by those skilled in the art when implementing the embodiments of the present application.

[0092] As shown in the hybrid automatic transmission bench calibration test system, Figure 2 for implementing the hybrid automatic transmission bench calibration test method, comprising:

[0093] The HCU control model detection module detects whether the HCU control model is included in the bench master control system of the hybrid automatic transmission bench, and according to the detection result of whether the HCU control model is included in the bench master control system, different calibration test methods are adopted, and the calibration test methods include the first calibration test method and the second calibration test method;

[0094] The first / second calibration test method selection module detects that the HCU control model is included in the test bench main control system of the hybrid automatic transmission. The first calibration test method is configured to first detect the sensor, obtain the first detection result based on the sensor feedback signal, and execute the corresponding first test method.

[0095] If the test system of the hybrid automatic transmission does not include the HCU control model, the second calibration test method is adopted. The second calibration test method is configured to first detect the communication interface of the test system, and then execute the second test method based on the second detection result obtained from the detection of the communication interface.

[0096] The power distribution / energy recovery test module is used to perform power distribution tests and energy recovery tests according to the first and second test methods.

[0097] The implementation methods of the system described above are merely illustrative. For example, the various functional modules, units, or subsystems within the system may or may not be physically separate, or they may or may not be physical units; that is, they may be located in the same place or distributed across multiple different systems and their subsystems or modules. Those skilled in the art can select some or all of the functional modules, units, or subsystems to achieve the objectives of the embodiments of the present invention according to actual needs. Those skilled in the art can understand and implement the above-described situations without any creative effort.

[0098] like Figure 3 and Figure 4 As shown, before performing the first and second calibration test methods, the hybrid transmission assembly is first installed on the test bench. The input end of the transmission assembly is connected to the input motor via the flywheel, clutch assembly, input speed and torque sensor, and output motor. The output end of the transmission assembly is connected to the output motor via the drive shaft and output speed and torque sensor. It is connected to the battery simulator via a high-voltage wiring harness according to the interface provided on the product, and to the water / oil temperature control unit via oil or water pipes. The wiring harness is connected according to the electrical schematic. The test bench communicates directly with the transmission assembly based on communication protocols such as XCP, directly requesting control of various components or assemblies of the transmission assembly. The test bench receives and sends commands to the battery simulator voltage and current signals, and the liquid flow and temperature signals from the water / oil temperature control unit, based on the J1939 protocol or Ethernet. The test begins by determining whether an HCU control model is present. If a control model is present, the first calibration test method is performed; otherwise, the second calibration test method is performed.

[0099] In the first calibration test method, the processing flow first enters the sensor detection logic block, which needs to detect whether the feedback signals of the sensors of the hybrid automatic transmission assembly are accurate. If the signals are accurate, the clutch calibration logic block is entered, and if the signals are not accurate, the sensor problem judgment module is entered. After the clutch calibration is completed, the shift calibration logic block is entered to calibrate the shift. According to the shift time requirement and the shift vibration and sound feedback, the shift speed point correction table is corrected, the shift air pressure or shift current and voltage are corrected, and the shift PID parameters in the control model are calibrated to ensure that the shift performance meets the requirements. After the shift calibration is completed, the power distribution logic block is entered. According to the control model and the engine power characteristic table, the engine is controlled to be in the best economic mode interval (the highest efficiency interval) to control the power output ratio of the engine, the first motor and the second motor. The output of the motor cannot exceed the upper limit of the power, speed and torque of the motor. After the power distribution calibration is completed, the energy recovery logic block is entered. The engine is simulated by the bench input motor to focus on the motor and measure the power recovery efficiency.

[0100] In the second calibration test method, the communication interface configuration logic block is first entered to configure the required measurement signals to ensure accurate, safe and reliable measurement in the subsequent measurement. After the communication interface configuration is completed, the clutch test is entered to determine the clutch engagement point and the torque corresponding curve of the clutch displacement and torque. The clutch torque variation curve with temperature is obtained. After the clutch test is completed, the shift test is entered. The shift actuator is controlled by the signal to perform the shift action to determine whether the shift actuator acts correctly. After the shift test is completed, the power distribution test is entered. The power distribution ratio is calculated according to formulas a, b, c and d. The engine (bench input motor) or motor is controlled by the signal to determine whether it outputs the torque correctly according to the torque. The five formulas are as follows:

[0101] (a)

[0102] (b)

[0103] (c)

[0104] (d)

[0105] In the above formulas, T 总 is the target total input torque, T1 is the rated torque of the first motor, T2 is the rated torque of the second motor, T3 is the rated torque of the engine, X1 is the torque distribution ratio of the first motor, X2 is the torque distribution ratio of the second motor, X3 is the torque distribution ratio of the engine, n maxFor the highest engine speed, i1 is the engine and the first motor speed ratio, i2 is the engine and the second motor speed ratio, P1 is the first motor rated power, P2 is the second motor rated power, P3 is the engine rated power.

[0106] As Figure 5 The structure diagram of the hybrid automatic transmission bench calibration test device for realizing the hybrid automatic transmission bench calibration test method described in the embodiments of the application, including in the patent: bench input motor 1, input speed torque sensor 2, clutch assembly 4, hybrid automatic transmission assembly 3, output speed torque sensor 4, bench output motor 5, battery simulator 6, oil temperature control unit 7, water temperature control unit 8, bench master control machine 9, wherein:

[0107] Bench master control machine 9 is used for configuring HCU control model;

[0108] Bench input motor 1 is used for simulating the output power of the engine;

[0109] Bench output motor 5 is used for simulating the output power of the hybrid automatic transmission;

[0110] Input speed torque sensor 2 is used for detecting the input speed and torque of the hybrid automatic transmission;

[0111] Output speed torque sensor 4 is used for detecting the output speed and torque of the hybrid automatic transmission;

[0112] Bench master control machine 9 is connected with bench input motor 1, input speed torque sensor 2, clutch assembly 4, hybrid automatic transmission assembly 3, output speed torque sensor 4 and bench output motor 5 respectively, input speed torque sensor 4 is connected between bench input motor 1 and clutch assembly 4, output speed torque sensor 4 is connected between hybrid automatic transmission assembly 3 and bench output motor 5, battery simulator 6, water temperature control unit 8 and oil temperature control unit 9 are connected with hybrid automatic transmission assembly 3 respectively.

[0113] The hybrid automatic transmission bench calibration test device realizes comprehensive testing of the performance of the hybrid automatic transmission through reasonable layout of the bench system, based on different connection relationships between various components, through various devices and their connection relationships. Through optimization of the system and optimization of the sensor position, and integration of the environmental control unit, the connection mode between the bench host computer and the input motor, sensor, clutch assembly, transmission assembly, output motor and other control units is clear, ensuring accurate data collection and effective execution of control instructions during testing, and the layout of the input speed and torque sensor and the output speed and torque sensor ensures accurate monitoring of the performance of the input and output ends of the transmission. By connecting the battery simulator, water temperature control unit and oil temperature control unit with the transmission assembly, the battery performance and temperature environment under actual working conditions can be simulated, improving the realism and accuracy of the test.

[0114] The hybrid automatic transmission bench calibration test device can more accurately measure and record key performance parameters such as the speed and torque of the transmission through precise device layout and sensor installation position, improving test accuracy, and based on the integrated environmental control unit, the battery performance and temperature changes under actual driving conditions can be simulated, making the test results more close to actual application scenarios, enhancing the realism of the test environment simulation, and the reasonable system layout and component connection mode simplifies the test process, reduces test preparation time, improves test efficiency, and improves test results. The test can realize comprehensive testing of various aspects of the transmission, including power transmission, clutch performance, shift logic, etc.

[0115] The technical features of the above embodiments can be combined in any way. To make the description concise, not all possible combinations of the technical features in the above embodiments are described, but as long as the combination of the technical features does not exist contradictory, it should be considered within the scope of the present application.

[0116] In addition, those skilled in the art can understand that although some embodiments described herein include certain features included in other embodiments rather than other features, the combination of features of different embodiments means that it is within the scope of the present application and forms different embodiments. For example: any one of the embodiments claimed in the claims can be used in any combination of the embodiments of the present application.

[0117] In the description of the specification, the description of the terms "one embodiment", "an example", "a specific example" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in one or more embodiments or examples.

[0118] In addition, the technical solutions among various embodiments of the present application can be combined with each other, but it must be based on the fact that a person skilled in the art can realize it, and when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist and is not within the protection scope required by the present application.

[0119] All features disclosed in the specification, or the steps in all methods or processes disclosed, can be combined in any manner, except for mutually exclusive features and / or steps. Any feature disclosed in the specification can be replaced by other equivalent or similar features having the same purpose, unless specifically stated otherwise. That is, each feature is only an example of a series of equivalent or similar features, unless specifically stated. Throughout the specification, the same reference signs indicate the same elements.

[0120] Those skilled in the art can understand that the modules in the device in the embodiments can be adaptively changed and arranged in one or more devices different from the embodiments. The modules or units or components in the embodiments can be combined into one module or unit or component, and furthermore can be divided into multiple sub-modules or sub-units or sub-components. All features disclosed in the specification (including the corresponding claims, abstract and drawings) and all processes or units of any method or device disclosed can be combined in any combination, except that at least some of such features and / or processes or units are mutually exclusive. Unless explicitly stated otherwise, each feature disclosed in the specification (including the corresponding claims, abstract and drawings) can be replaced by an alternative feature providing the same, equivalent or similar purpose.

[0121] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A method for test calibration of a hybrid automatic transmission bench, applied to a hybrid automatic transmission bench calibration test system, characterized in that, include: The test bench main control system of the hybrid automatic transmission test bench is used to check whether the HCU control model is included. Based on the test results of whether the HCU control model is included in the test bench main control system, different calibration test methods are adopted. The calibration test methods include a first calibration test method and a second calibration test method. If the test bench main control system of the hybrid automatic transmission is found to include an HCU control model, the first calibration test method is adopted. The first calibration test method is configured to first detect the sensor, obtain the first detection result based on the sensor feedback signal, and execute the corresponding first test method. The first calibration test method is configured to first detect the sensors, specifically: detect whether the feedback signals of each sensor in the hybrid automatic transmission assembly are accurate; if the sensor feedback signals are accurate, then perform clutch calibration; if the sensor feedback signals are detected to be inaccurate, then proceed to sensor problem determination. If the test bench main control system of the hybrid automatic transmission does not include the HCU control model, the second calibration test method is adopted. The second calibration test method is configured to enter the clutch test when the sensor signal feedback is correct; when the sensor signal feedback is incorrect, the communication interface of the test bench main control system is first detected, and the second test method is executed based on the second detection result obtained by detecting the communication interface. Based on the first and second testing methods, power distribution tests and energy recovery tests were conducted.

2. The hybrid automatic transmission bench calibration test method according to claim 1, characterized in that, The system checks whether the feedback signals from each sensor in the hybrid automatic transmission assembly are accurate. If the sensor feedback signals are accurate, the system performs clutch calibration to determine the clutch engagement point, clutch displacement, and torque curve, and corrects the clutch parameters or curves that change with temperature. After the clutch calibration is completed, the shift calibration is performed. The calibration is based on the shift time requirements, shift vibration, shift speed point correction table, shift air pressure or shift current, voltage correction, and shift PID parameters in the HCU control model. After completing the clutch calibration, power distribution is performed, and the power output ratio of the engine and motor is controlled according to the HCU control model and engine power characteristic table.

3. The hybrid automatic transmission bench calibration test method according to claim 2, characterized in that, The method for detecting whether the feedback signals of each sensor in the hybrid automatic transmission assembly are accurate is as follows: if the feedback signal of the sensor is detected to be inaccurate, the process proceeds to the sensor problem determination module. The first step is to test the communication interface of the bench main control system. Specifically, if a communication interface configuration error is detected, the communication interface is reconfigured and the test is repeated.

4. The hybrid automatic transmission bench calibration test method according to claim 3, characterized in that, It also includes wiring harness inspection. If a fault is detected in the wiring harness, the wiring harness is replaced and the test is restarted. Alternatively, if no fault is found in the wiring harness, the motor is considered to be faulty.

5. The hybrid automatic transmission bench calibration test method according to claim 1, characterized in that, The first step is to test the communication interface of the bench main control system, specifically: Configure the communication interface. After configuration, proceed with clutch testing to determine the clutch engagement point, clutch displacement, torque curves, and obtain the clutch torque transmission curve as a function of temperature. After the clutch test is completed, the shift test begins. The shift actuator is controlled by a signal to perform the shift action, and it is determined whether the shift actuator is working correctly. After the gear shift test is completed, the full power test begins. The power distribution ratio is calculated according to the preset formula, and the torque is correctly output during the gear shift test is determined based on the action of the engine or motor.

6. The hybrid automatic transmission bench calibration test method according to claim 5, characterized in that, The preset formula includes: First formula: ; Second formula: ; Third formula: ; Fourth formula: ; Fifth Formula: ; Wherein: T 总 The target input torque is defined as follows: T1 is the rated torque of the first motor, T2 is the rated torque of the second motor, T3 is the rated torque of the engine, X1 is the torque distribution ratio of the first motor, X2 is the torque distribution ratio of the second motor, X3 is the torque distribution ratio of the engine, and n. max i1 is the engine's maximum speed, i2 is the speed ratio between the engine and the first motor, i3 is the speed ratio between the engine and the second motor, P1 is the rated power of the first motor, P2 is the rated power of the second motor, and P3 is the rated power of the engine.

7. The hybrid automatic transmission bench calibration test method according to claim 5, characterized in that, The determination of whether the torque is correctly output during the gear shift test based on the operation of the engine or motor is as follows: Based on the operation of the engine or motor, determine whether the torque is output correctly during the gear shift test.

8. A hybrid automatic transmission bench calibration test system, used to implement the hybrid automatic transmission bench calibration test method according to any one of claims 1 to 7, characterized in that, include: The HCU control model detection module detects whether the main control system of the hybrid automatic transmission test bench includes an HCU control model. Based on the detection result of whether the main control system of the test bench includes an HCU control model, different calibration test methods are adopted. The calibration test methods include a first calibration test method and a second calibration test method. The first / second calibration test method selection module detects that the HCU control model is included in the test bench main control system of the hybrid automatic transmission. The first calibration test method is configured to first detect the sensor, obtain the first detection result based on the sensor feedback signal, and execute the corresponding first test method. The first calibration test method is configured to first detect the sensors, specifically: detect whether the feedback signals of each sensor in the hybrid automatic transmission assembly are accurate; if the sensor feedback signals are accurate, then perform clutch calibration; if the sensor feedback signals are detected to be inaccurate, then proceed to sensor problem determination. If the test bench main control system of the hybrid automatic transmission does not include the HCU control model, the second calibration test method is adopted. The second calibration test method is configured to enter the clutch test when the sensor signal feedback is correct; when the sensor signal feedback is incorrect, the communication interface of the test bench main control system is first detected, and the second test method is executed based on the second detection result obtained by detecting the communication interface. The power distribution / energy recovery test module is used to perform power distribution tests and energy recovery tests according to the first and second test methods.

9. A hybrid automatic transmission bench calibration test apparatus, used to implement the hybrid automatic transmission bench calibration test method according to any one of claims 1 to 7, characterized in that, include: The test bench includes an input motor, an input speed and torque sensor, a clutch assembly, a hybrid automatic transmission assembly, an output speed and torque sensor, a test bench output motor, a battery simulator, an oil temperature control unit, a water temperature control unit, and a test bench main controller. Among these components: The benchtop main control unit is used to configure the HCU control model. A bench input motor is used to simulate the output power of an engine; The bench output motor is used to simulate the output power of a hybrid automatic transmission; Input speed and torque sensors are used to detect the speed and torque input to the hybrid automatic transmission; Output speed and torque sensor, used to detect the speed and torque output by the hybrid automatic transmission; The main control unit of the test bench is connected to the test bench input motor, input speed and torque sensor, clutch assembly, hybrid automatic transmission assembly, output speed and torque sensor, and test bench output motor. The input speed and torque sensor is connected between the bench input motor and the clutch assembly, and the output speed and torque sensor is connected between the hybrid automatic transmission assembly and the bench output motor.

10. The hybrid automatic transmission bench calibration test apparatus according to claim 9, characterized in that, The battery simulator, water temperature control unit, and oil temperature control unit are respectively connected to the hybrid automatic transmission assembly.

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