System, method and apparatus for testing a hybrid electric drive unit of a vehicle

Abstract

The present application relates to the field of vehicle control, and provides a system, method and device for testing a hybrid electric drive unit of a vehicle.SOLUTION: The test system includes a test table, a first dynamometer connected to a generator of a hybrid electric drive unit, a second dynamometer and a third dynamometer connected to two ends of a real vehicle semi-shaft of the hybrid electric drive unit through an output shaft, a main controller respectively connected to a first power supply, a second power supply, the hybrid electric drive unit, the first dynamometer, the second dynamometer, and the third dynamometer, a first power supply connected to the first dynamometer, the second dynamometer, and the third dynamometer, a second power supply connected to the hybrid electric drive unit, a filter connected between the second power supply and the hybrid electric drive unit, and a test module for performing an electromagnetic compatibility test on the hybrid electric drive unit.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] This application relates to the field of vehicle control, and more particularly to systems, methods and apparatus for testing hybrid electric drive units of vehicles. [Background technology]

[0002] As hybrid electric drive unit technology matures, its market share is increasing significantly. However, its performance and reliability differ from conventional single-motor drive systems, necessitating the development of new testing methods and capabilities. Electromagnetic compatibility (EMC) testing is an important part of ensuring stable operation of hybrid electric drive systems in various operating environments. EMC testing primarily involves multidimensional testing and evaluation methods to assess system stability in electromagnetic fields, interference resistance, compatibility with other electronic devices, and electrical performance. At the same time, to more faithfully simulate the electromagnetic conditions of hybrid electric drive units in actual operating environments, a dedicated EMC anechoic chamber is required. An EMC anechoic chamber is a space with an electromagnetic shielding structure that isolates external electromagnetic fields and ensures a stable and reproducible test environment.

[0003] Currently, existing test racks are unable to realize hybrid electric drive systems. In other words, in electric drive systems that integrate a drive motor and a generator, it is impossible to realize multi-axis simultaneous load conditions, such as actual driving load conditions such as charging while driving and energy regeneration during deceleration.

[0004] SUMMARY OF THE INVENTION Accordingly, the present application provides a system, method and apparatus for testing a hybrid electric drive unit of a vehicle to solve at least one of the above-mentioned problems. Summary of the Invention [Problem to be solved by the invention]

[0005] The purpose of the present application is to provide a system, method and apparatus for testing a hybrid electric drive unit of a vehicle, which can solve at least one of the above problems. The specific technical solutions are as follows: [Means for solving the problem]

[0006] According to an embodiment of the present application, in a first aspect, the present application provides a testing system for a hybrid electric drive unit of a vehicle, comprising: a test table for placing a hybrid electric drive unit to be measured; a first dynamometer connected to a generator of the hybrid electric drive unit for simulating the power generation state of the generator; a second dynamometer and a third dynamometer connected by output shafts to both ends of half shafts of an actual vehicle of the hybrid electric drive unit; a main control device connected to a first power source, a second power source, the hybrid electric drive unit, the first dynamometer, the second dynamometer, and the third dynamometer, respectively, for controlling and monitoring the first power source, the second power source, the hybrid electric drive unit, the first dynamometer, the second dynamometer, and the third dynamometer that are connected; the first power supply connected to the first dynamometer, the second dynamometer, and the third dynamometer for supplying power to the first dynamometer, the second dynamometer, and the third dynamometer and for sending and receiving data to the main control device; the second power supply connected to the hybrid electric drive unit for simulating changes in battery voltage and battery current of the hybrid electric drive unit during operation of the vehicle; a filter connected between the second power supply and the hybrid electric drive unit for filtering an electrical signal input from the second power supply to the hybrid electric drive unit; and a test module for performing an electromagnetic compatibility test on the hybrid electric drive unit.

[0007] According to an embodiment of the present application, in a second aspect, the present application provides a method for testing a hybrid electric drive unit of a vehicle, comprising: controlling the main control device to perform an operating condition load on the hybrid electric drive unit, the operating condition load including the hybrid electric drive unit outputting a rotational speed, the second dynamometer and the third dynamometer respectively outputting a torque, the generator outputting a rotational speed, and the first dynamometer outputting a torque; and controlling the test module to perform an electromagnetic compatibility test on the hybrid electric drive unit in response to the hybrid electric drive unit completing the operating condition load.

[0008] According to an embodiment of the present application, in a third aspect, the present application provides a testing apparatus for a hybrid electric drive unit of a vehicle, comprising: a control unit for controlling the main control device to perform an operating condition load on the hybrid electric drive unit, the operating condition load including the hybrid electric drive unit outputting a rotational speed, the second dynamometer and the third dynamometer respectively outputting a torque, the generator outputting a rotational speed, and the first dynamometer outputting a torque; and a judgment unit for judging whether the hybrid electric drive unit completes the operating condition load, wherein the control unit further controls the test module to perform an electromagnetic compatibility test on the hybrid electric drive unit in response to the hybrid electric drive unit completing the operating condition load.

[0009] The above-described configuration of the embodiment of the present application has at least the following advantages over the prior art. The test system provided by the present application has three dynamometers connected to a hybrid electric drive unit, of which the first dynamometer is connected to the generator of the hybrid electric drive unit, and the second and third dynamometers are connected to both ends of the half axles of the actual vehicle of the hybrid electric drive unit by the output shaft. Based on this, the test system can simultaneously realize the load when the drive motor of the hybrid electric drive unit is attached to the half axle of the original vehicle, and the entire device can meet the requirements of an electromagnetic compatibility anechoic chamber, and simulate the sample load state under actual road conditions by synchronously controlling the three-axle load condition of the hybrid electric drive unit.

[0010] In order to more clearly describe the specific embodiments of the present invention or the technical solutions of the prior art, the following briefly describes the drawings used in the description of the specific embodiments of the present invention or the prior art. The drawings in the following description are obviously some embodiments of the present invention, and other drawings can also be obtained from these drawings by those skilled in the art without any inventive efforts. [Brief explanation of the drawings]

[0011] [Figure 1] FIG. 1 is a block diagram illustrating a test system for a vehicle hybrid electric drive unit. [Figure 2] FIG. 1 is a schematic diagram showing the test system setup for an electromagnetic compatibility test chamber. [Figure 3] FIG. 1 is a detailed schematic diagram showing the test system setup for an electromagnetic compatibility test chamber. [Figure 4] 3 is a flowchart illustrating a method for testing a hybrid electric drive system for a vehicle according to an embodiment of the present invention. [Figure 5] 1 is a flow chart illustrating a method for providing driving condition loading to a hybrid electric drive unit of a vehicle according to a driving condition curve. [Figure 6] 1 is a flow chart illustrating a method for providing driving condition loading to a hybrid electric drive unit of a vehicle according to an operating mode. [Figure 7]1 is a block diagram showing a testing device for a hybrid electric drive unit of a vehicle according to an embodiment of the present invention; DETAILED DESCRIPTION OF THE INVENTION

[0012] In order to clarify the purpose, technical solution and advantages of the present application, the present application will be described in more detail below with reference to the drawings. However, it is clear that the described embodiments are only some of the embodiments of the present application, and do not represent all of the embodiments. Based on the embodiments of the present invention, all other embodiments that can be obtained by those skilled in the art without inventive work fall within the scope of protection of the present invention.

[0013] As hybrid electric drive unit technology matures, its market share is increasing significantly. However, its performance and reliability differ from conventional single-motor drive systems, necessitating the development of new testing methods and capabilities. Electromagnetic compatibility (EMC) testing is an important part of ensuring stable operation of hybrid electric drive systems in various operating environments. EMC testing primarily involves multidimensional testing and evaluation methods to assess system stability in electromagnetic fields, interference resistance, compatibility with other electronic devices, and electrical performance. At the same time, to more faithfully simulate the electromagnetic conditions of hybrid electric drive units in actual operating environments, a dedicated EMC anechoic chamber is required. An EMC anechoic chamber is a space with an electromagnetic shielding structure that isolates external electromagnetic fields and ensures a stable and reproducible test environment.

[0014] Currently, existing test racks are unable to realize hybrid electric drive systems. In other words, in electric drive systems that integrate a drive motor and a generator, it is impossible to realize multi-axis simultaneous load conditions, such as actual driving load conditions such as charging while driving and energy regeneration during deceleration.

[0015] Therefore, the present application aims to provide a test system for a vehicle hybrid electric drive unit to handle the loads of a hybrid electric drive system under actual road conditions in a dark room. At the same time, it is desirable that the test system be able to meet the load requirements of various types of electric drive systems, such as a single-axle load for a single-motor electric drive system, a dual-axle opposed load with half axles of an actual vehicle for a single-motor electric drive system, and a dual-axle load with half axles of an actual vehicle for a dual-motor electric drive system, thereby providing a more comprehensive test system for verifying the electromagnetic compatibility of electric drive systems.

[0016] Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

[0017] The present application provides an embodiment of a test system for a vehicle hybrid electric drive unit.

[0018] Hereinafter, an embodiment of the present invention will be described in detail with reference to FIG.

[0019] As shown in FIG. 1 , the hybrid electric drive unit testing system includes a test table 101, a first dynamometer 102, a second dynamometer 103, a third dynamometer 104, a main control unit 105, a first power supply 106, a second power supply 107, a filter 108, and a test module 109, and the hybrid electric drive unit to be measured is considered as a sample (Device Under Test, DUT) and is represented by 110.

[0020] The test table 101 is for installing the hybrid electric drive unit 110 to be measured, and for installing test equipment such as high and low voltage harnesses, high and low voltage artificial power supply networks, photoelectric conversion devices, storage batteries, etc., which are arranged according to the corresponding test standards.

[0021] In this application, the first dynamometer 102 refers to a generator dynamometer.

[0022] The first dynamometer 102 is connected to the generator of the hybrid electric drive unit 110 to be measured, and is used to simulate the power generation state of the generator, and can satisfy the maximum operating conditions of, for example, 6000 rpm and 500 N·m.

[0023] In this application, the second dynamometer 103 and the third dynamometer 104 represent dual axis dynamometers of the hybrid electric drive unit 110 under test.

[0024] To ensure the authenticity and reliability of the test results, the second dynamometer 103 and the third dynamometer 104 are connected to both ends of the half-axles of the hybrid electric drive unit 110 under test via output shafts to simulate the power output and torque characteristics of the drive motor of the hybrid electric drive unit 110 under test under actual road conditions. These components can simulate the driving conditions of a vehicle on an actual road, including acceleration / deceleration, constant speed, and power recovery processes. Testing with the dual-axis dynamometer can accurately evaluate the electromagnetic compatibility performance of the electric drive unit under actual road driving conditions, providing powerful support for the development and debugging of electric drive systems. At the same time, this pair of dynamometers can also meet the single-axis load tests of the drive motor and the single-axis load tests of a dual-drive motor electric drive system.

[0025] The main control device 105 is connected to the first power source 106, the second power source 107, the hybrid electric drive unit 110 to be measured, the first dynamometer 102, the second dynamometer 103, and the third dynamometer 104, respectively, and controls and monitors the first power source 106, the second power source 107, the hybrid electric drive unit 110 to be measured, the first dynamometer 102, the second dynamometer 103, and the third dynamometer 104 connected thereto.

[0026] By way of example, the control functions of the master controller 105 include voltage and current control, rotational speed and torque control of the dynamometer and the electric drive unit being measured. The monitoring functions include test system and sample temperature, coolant flow rate, voltage, current, rotational speed, torque, etc.

[0027] In this application, the first power supply 106 refers to a dynamometer power supply.

[0028] The first power supply 106 is connected to the first dynamometer 102, the second dynamometer 103, and the third dynamometer 104, and is used to supply power to the first dynamometer 102, the second dynamometer 103, and the third dynamometer 104 and to transmit and receive data to the main control device 105.

[0029] In this application, the second power supply 107 refers to a sample power supply.

[0030] The second power supply 107 is connected to the hybrid electric drive unit 110 under test and simulates the changes in battery voltage and battery current of the hybrid electric drive unit 110 under test when the vehicle is in operation, ensuring that the power supply environment under various operating conditions of the electric drive unit during measurement is consistent with the actual usage situation, thereby ensuring the authenticity and reliability of the test results.

[0031] In this application, the second power supply 107 can be configured according to the actual situation, simulating different operating conditions such as various voltages, currents, and frequencies to meet various test requirements. The use of this component allows accurate evaluation of the electromagnetic compatibility performance of the electric drive unit under different operating conditions, providing strong support for the development and debugging of electric drive systems.

[0032] As an example, the test system 100 may further include a flexible connection device for connecting the output shafts of the first dynamometer 102 and the first power supply 106, and the length and height of the connection may be adjustable to accommodate test samples of different specifications.

[0033] The filter 108 is connected between the second power supply 107 and the hybrid electric drive unit 110 under test, and filters the electrical signal input from the second power supply 107 to the hybrid electric drive unit 110 under test.

[0034] Test module 109 performs electromagnetic compatibility testing on hybrid electric drive unit 110 under test.

[0035] The test system of the present application can simultaneously realize a load when the drive motor of the hybrid electric drive unit 110 under test is attached to half axles of the original vehicle. The flexible loading method allows the generator dynamometer to adapt to the axle distances of various electric drive units, thereby realizing a belt-loaded power generation state of the generator. The entire system can meet the relevant requirements of an electromagnetic compatibility anechoic chamber, and by synchronously controlling the three-axle load conditions of the hybrid electric drive unit 110 under test, it can simulate a sample load state under actual road conditions.

[0036] This test table method can be applied to the EMC testing of electric drive systems with incrementing dual motor loads, and can evaluate the EMC performance of electric drive systems in electrically interfering environments, helping manufacturers meet relevant EMC standards and regulatory requirements.

[0037] In today's electric vehicle field, electromagnetic compatibility testing is crucial to ensuring the stability and safety of vehicle systems. This application aims to address the challenges of the ongoing development of hybrid electric drive unit 110 technology under test, particularly the need for electromagnetic compatibility performance, electromagnetic safety, and electrical performance testing. As hybrid electric drive technology becomes increasingly mature and its market share increases, traditional testing methods may not adequately meet its specific and diverse testing requirements. Therefore, the purpose of this application is to provide an innovative electromagnetic compatibility testing method to ensure stable operation of hybrid electric drive systems in various operating environments.

[0038] Furthermore, this application seeks to address some of the limitations of existing electromagnetic compatibility anechoic chambers, enabling them to accommodate the multi-axial loading conditions of hybrid electric drive systems. By designing a construction method that accommodates triaxial loading, this application aims to provide a more flexible and comprehensive testing solution to meet the testing requirements of different types of electric drive systems. This not only enhances the feasibility of hybrid electric drive system construction, but also contributes to technological innovation in the development of the entire electric vehicle industry.

[0039] Conventional electromagnetic compatibility anechoic chambers have a purely sealed structure to ensure signal shielding performance outside the space, and are therefore unable to meet the various test conditions required when testing the hybrid electric drive unit 110 under test.

[0040] Therefore, the present application provides a suitable darkroom setup for the electromagnetic compatibility configuration of the hybrid electric drive unit 110 under test.

[0041] In this application, the test module 109 includes a receiver, a probe, an antenna, a signal source, and a power amplifier. For example, in an anechoic chamber for performing electromagnetic compatibility testing, the hybrid electric drive unit 110 under test, the test table 101, the probe, and the antenna are located inside the anechoic chamber, and the first dynamometer 102, the second dynamometer 103, the third dynamometer 104, the main control unit 105, the first power supply 106, the second power supply 107, the filter 108, the receiver, the power amplifier, and the signal source are located outside the anechoic chamber.

[0042] FIG. 2 is a schematic diagram showing the test system setup for the anechoic electromagnetic compatibility test chamber.

[0043] As shown in FIG. 2, a voltage is input from the sample power supply, filtered through filter 108, and then sent to the high-voltage line impedance stabilization network (HV LISN) to provide a high-voltage electrical signal to the sample. At the same time, a voltage is input from a low-voltage power supply (e.g., BAT) to the low-voltage line impedance stabilization network (LV LISN), which provides a low-voltage electrical signal to the sample. The system's main controller 105 and the receiver of the test module 109 are located in the control room outside the darkroom, and the signal source is located in the power amplifier room outside the darkroom, i.e., the area where the power amplifiers are located. Based on this, the system's main controller 105 controls each power supply and dynamometer to complete the loading of the operating conditions on the sample. Furthermore, the sub-modules of the test module 109 cooperate with each other inside and outside the darkroom to complete the electromagnetic compatibility test on the sample.

[0044] As an example, the hybrid electric drive unit 110 under test can be equipped with an insulating tool, and the hybrid electric drive unit 110 under test is connected to the test table 101, the second dynamometer 103, and the third dynamometer 104 based on the insulating tool. This installation can further reduce electromagnetic interference and improve the accuracy of the electromagnetic compatibility test.

[0045] As an example, a first capacitor and a first resistor may be disposed between the test table 101 and the ground. Here, the capacitance value of the first capacitor is set based on the capacitance value between the white vehicle body and the ground, and the resistance value of the first resistor is set based on the resistance value between the white vehicle body and the ground.

[0046] As an example, a second capacitor and a second resistor may be disposed between the test table 101 and the hybrid electric drive unit 110 under test. Here, the capacitance value of the second capacitor is set based on the capacitance value between the white vehicle body and the hybrid electric drive unit 110 under test, and the resistance value of the second resistor is set based on the resistance value between the white vehicle body and the hybrid electric drive unit 110 under test.

[0047] In this application, capacitors and resistors that are used in a real vehicle scene are installed between the test table 101 and the hybrid electric drive unit 110 under test, and between the test table 101 and the ground, thereby simulating the capacitance and resistance environment of a real vehicle and ensuring that the electromagnetic compatibility test results are closer to the actual values.

[0048] FIG. 3 is a detailed schematic diagram showing the test system setup for the anechoic electromagnetic compatibility test chamber.

[0049] For example, Figure 3 shows the detailed setup of each component in Figure 2. The component names are listed in Table 1 according to their numbers.

[0050] [Table 1]

[0051] Here, for each box in Table 1, the number is shown on the left and the name of the component is shown on the right.

[0052] For example, the correspondence or subordination between each component in FIG. 3 and each component in FIG. 2 is shown in Table 2 according to their numbers.

[0053] [Table 2]

[0054] Here, for each square in Table 2, the left side shows the number in Figure 3, and the right side shows the name of the component in Figure 2 to which the component with that number corresponds or belongs. Taking the corresponding relationship as an example, number 23 indicates the test antenna in Figure 2. Taking the subordinate relationship as an example, number 3 indicates that the low-dielectric-constant material support is subordinate to the test table in Figure 2. Note that numbers 5, 6, and 27 do not belong to any of the components shown in Figure 2, and numbers 5 and 6 indicate connecting lines, and number 27 indicates a connecting axis.

[0055] This application provides a system for testing the electromagnetic compatibility of three-axle loads of a vehicle's hybrid electric drive unit. The system includes components such as a system main controller, power supply, dynamometer, flexible connection, and test table. In the implementation process, the spatial setup within the darkroom is first considered based on the existing space to achieve optimal testing effectiveness and ease of operation, and a basic setup is completed, including the darkroom, dynamometer, control room, power amplifier room, and power cabinet. Next, the test system is completed, including the flexible connection, the system main controller, darkroom filtering, and anti-jam equipment, and installation and debugging are then completed. Based on this, the hybrid electric drive unit under test is placed on the test table, the drive motor output shaft is connected to the dynamometer, the generator shaft is connected to the generator dynamometer via a flexible connection, the high- and low-voltage power lines are connected to a power supply device via an artificial power network, and the communication line is connected to the system main controller outside the darkroom via a photoelectric conversion device. The sample power supply and the dynamometer power supply are used to simulate the power supply situation on an actual road. Furthermore, connect the test antenna and equipment required for the test, and finally use the system's main control unit to control the sample power supply to provide the rated voltage to the sample under test, and according to the operating state in the test plan, the drive motor dynamometer provides the rotation speed, the drive motor of the sample under test provides the torque, the generator dynamometer provides the rotation speed, the generator of the sample under test provides the torque, and discharge to the load by the DCDC to realize the test operating condition load. After completion, the sample under test is monitored, and the electromagnetic compatibility test is carried out according to the relevant test plan.

[0056] The present application also provides a method embodiment having a corresponding relationship with the above embodiment to explain the implementation method of the test system of the above embodiment, and has the same effects as the above embodiment based on the same names and meanings as the above embodiment, so the description is omitted here.

[0057] This application provides an example of a method for testing a vehicle hybrid electric drive unit.

[0058] Hereinafter, the embodiment of the present invention will be described in detail with reference to FIG. FIG. 4 is a flowchart showing a method for testing a hybrid electric drive system for a vehicle according to an embodiment of the present invention. As shown in FIG. 4, the method includes the following steps S401 and S402.

[0059] In step S401, the main control device is controlled to apply a driving condition load to the hybrid electric drive unit.

[0060] The driving condition load includes: the hybrid electric drive unit outputs a rotation speed; the second dynamometer and the third dynamometer respectively output a torque; the generator outputs a rotation speed; and the first dynamometer outputs a torque.

[0061] In step S402, in response to the hybrid electric drive unit completing the driving condition load, the test module is controlled to perform an electromagnetic compatibility test on the hybrid electric drive unit.

[0062] The method provided herein is applied to the test system described in any of the above embodiments, and the main control unit of the system operates each dynamometer and generator to cooperate with each other to realize the driving condition load of the hybrid electric drive unit under actual road conditions.

[0063] In one possible embodiment, the hybrid electric drive unit may perform dynamic driving condition loading according to a driving condition curve, for example, the driving condition curve may be a CLTC (China Light-duty Vehicle Test Cycle) curve.

[0064] 5 shows a flowchart of a method for determining the driving condition load of a hybrid electric drive unit of a vehicle according to a driving condition curve, as shown in FIG. 5, the method includes steps S501 and S502.

[0065] In step S501, the main control device is controlled based on the light vehicle driving state CLTC curve to load the hybrid electric drive unit with dynamic driving conditions.

[0066] The CLTC curve includes each operating state of the hybrid electric drive unit.

[0067] In step S502, in response to the hybrid electric drive unit completing the driving condition load, the test module is controlled to perform an electromagnetic compatibility test on the hybrid electric drive unit.

[0068] In the embodiment of the present application, the dynamic state loading method can provide a continuously changing dynamic test environment for the electromagnetic compatibility test, thereby improving the convenience and applicability of the electromagnetic compatibility test.

[0069] As one possible example, a vehicle's hybrid electric drive unit may perform driving condition loading based on the operating mode of the support.

[0070] 6 is a flowchart showing a method for performing driving condition loading of a hybrid electric drive unit of a vehicle according to an operating mode. As shown in FIG. 6, the method includes the following steps S501 and S502:

[0071] In step S601, the main control device is controlled to apply operating conditions to the hybrid electric drive unit according to the operating mode supported by the hybrid electric drive unit.

[0072] The operating modes include a pure electric mode, a series mode, a parallel mode, or an energy recovery mode.

[0073] In step S602, in response to completion of the driving condition loading of the hybrid electric drive unit, the test module is controlled to perform an electromagnetic compatibility test on the hybrid electric drive unit.

[0074] In the embodiment of the present application, it is possible to realize the operating condition load for a specific operation mode, so that the test requirements of the electromagnetic compatibility test for the specific operation mode can be met, and the convenience of the test is improved.

[0075] Here, the pure electric mode is an operating mode in which the electric drive is directly driven.

[0076] The series mode is an operating mode in which the generator outputs to the battery pack, and the battery pack then outputs to the drive motor.

[0077] The parallel mode is an operating mode in which, when the engine directly drives the vehicle, if there is power to spare, the battery can generate electricity, and if there is a power shortage, the motor drives the vehicle together with the engine.

[0078] The energy recovery mode is an operating mode in which the drive motor and generator output power to the battery pack.

[0079] In the test method provided herein, a sample is placed on a test table, the half axles of a real vehicle electric drive system are respectively connected to the output axles of two dynamometers, and the sample generator is connected to the generator dynamometer via a flexible connection device. The high-voltage input and output of the sample are connected to an artificial power network inside the darkroom and to a power source and load outside the darkroom via a filter outside the darkroom. The low-voltage input of the sample is connected to a battery inside the darkroom via an artificial power network inside the darkroom. The dynamometer, generator dynamometer, and test sample communication lines are connected to the system's main control unit outside the darkroom. The test sample is connected to the test table and dynamometer via an insulating tool, and a capacitor and resistor are added between the test table and the darkroom ground and between the test table and the test sample, respectively. The test table is the capacitor relative to the darkroom ground, and the resistance parameters are referenced to the entire vehicle's white body relative to the ground, and the capacitor and resistance parameters of the test table relative to the test sample are referenced to the entire vehicle's white body. The test system was configured based on the test items. The representative diagram of the hybrid electric drive system's electric field radiated emissions and immunity test setup, as well as the antenna and harness locations, refer to GB / T 18655. The system's main control unit was used to load the test specimen under dynamic operating conditions. The motor of the test specimen outputted the RPM, the dynamometers at both ends of the motor outputted the torque, the generator of the test specimen outputted the RPM, and the generator dynamometer outputted the torque. The operating condition curve CLTC was referenced, and the operating condition curve should cover all operating conditions of the hybrid electric drive system. In addition to dynamic operating conditions, the test rack was also capable of loading the hybrid electric drive system in various modes, including pure electric mode (direct drive of the electric drive), series (the generator outputs to the battery pack, and the battery pack outputs to the traction motor), parallel (the engine directly drives the vehicle, and if power is available, the battery can generate electricity, and if power is insufficient, the motor cooperates with the engine to drive the vehicle), and energy recovery (the traction motor and generator output to the battery pack). Electromagnetic compatibility tests were conducted according to the test plan.For steady-state operating conditions (pure power mode, series mode, parallel mode), reference is made to GB / T18655 and GB / T33014 radiated emission and radiated immunity test methods. For dynamic operating conditions such as energy recovery mode, a receiver Maxhold with FFT is adopted, and the system's main controller simultaneously controls the drive motor output, generator output, and receiver, synchronizing the operating condition cycle with the receiver sweep. The electromagnetic compatibility test method for the three-axle load of a hybrid electric drive unit in this patent basically covers relevant tests of electromagnetic compatibility under various road load conditions for various types of electric drive systems for passenger cars. The anechoic chamber meets the requirement that the bottom noise be lower than the limit value of 6dB under no-load operating conditions, and the anechoic chamber equipment can operate normally at the standardized immunity field strength, complying with the design specifications for the electromagnetic compatibility anechoic chamber.

[0080] The present application also provides an apparatus embodiment having a corresponding relationship with the above-mentioned embodiment for performing the method steps of the above-mentioned embodiment, and based on the same names and meanings as the above-mentioned embodiment, has the same effects as the above-mentioned embodiment, and the description thereof will be omitted here.

[0081] As shown in FIG. 7, the present application provides a testing device 700 for a hybrid electric drive unit of a vehicle, which includes a control unit 701 and a judgment unit 702.

[0082] The control unit 701 controls the main control device to load the hybrid electric drive unit under operating conditions. The load conditions include the hybrid electric drive unit outputting a rotation speed, the second dynamometer and the third dynamometer outputting a torque, the generator outputting a rotation speed, and the first dynamometer outputting a torque. The judgment unit 702 is for judging whether the hybrid electric drive unit has completed the load conditions. The control unit 701 is also for controlling the test module to perform an electromagnetic compatibility test on the hybrid electric drive unit in response to the hybrid electric drive unit completing the load conditions.

[0083] In one embodiment, the control unit 701 controls the main controller to apply driving condition loads to the hybrid electric drive unit in the following manner: based on the CLTC curve of the light vehicle's driving operation state, the main controller applies driving condition loads to the hybrid electric drive unit. The CLTC curve includes each operating state of the hybrid electric drive unit.

[0084] In one embodiment, the control unit 701 controls the main controller to load the hybrid electric drive unit with the following operation mode: control the main controller to load the hybrid electric drive unit with the operation mode supported by the hybrid electric drive unit, where the operation mode includes pure electric mode, series mode, parallel mode, or energy recovery mode.

[0085] In the apparatus of the above-mentioned embodiment, the specific method by which each module performs the operation has been described in detail in the embodiment of the method, so it will not be described in detail here.

[0086] Although operations are described in the figures in a particular order, it should not be understood that these operations need to be performed in the particular order or sequential order shown, or that all of the operations shown need to be performed to achieve desired results. In certain environments, multitasking and parallel processing may be advantageous.

[0087] The methods and apparatus of the present application can be achieved using standard programming techniques, rule-based logic, or other logic to implement the various method steps. Also, it should be noted that the terms "apparatus" and "module," as used in this specification and claims, are intended to include those employing one or more lines of software code and / or hardware and / or devices for receiving input.

[0088] Any step, operation, or program described herein may be performed or implemented using one or more hardware or software modules, alone or in combination with other devices. In one embodiment, the software modules are implemented using a computer program product that includes a computer-readable medium containing computer program code, which can cause a computer processor to execute any or all of the described steps, operations, or programs.

[0089] The foregoing description of the embodiments of the present application has been presented for purposes of illustration and description. It is not intended to be exhaustive or to limit the present application to the precise form disclosed, as various modifications and variations may be possible in light of the above teachings or from practice of the present application. These embodiments have been chosen and described in order to explain the principles and practical applications of the present application so that others skilled in the art may utilize the present application in various embodiments and various modifications in particular applications suited to the concepts.

[0090] In the apparatus of the above embodiment, the specific method by which each module performs the operation has been described in detail in the embodiment of the method, so it will not be described in detail here.

[0091] The above examples are for illustrating the technical solutions of the present application and are not intended to limit the present application. Although the present application has been described in detail with reference to the above examples, those skilled in the art will understand that the technical features described in the above examples may be modified or partly changed in a similar manner, and these modifications or changes will not deviate from the essence of the corresponding technical solutions and the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. 1. A system for testing a hybrid electric drive unit of a vehicle, comprising: a test table for placing the hybrid electric drive unit under test; a first dynamometer connected to a generator of the hybrid electric drive unit for simulating a power generation state of the generator; a second dynamometer and a third dynamometer connected by output shafts to opposite ends of half shafts of the hybrid electric drive unit; a master controller connected to a first power source, a second power source, the hybrid electric drive unit, the first dynamometer, the second dynamometer, and the third dynamometer, respectively, for controlling and monitoring the first power source, the second power source, the hybrid electric drive unit, the first dynamometer, the second dynamometer, and the third dynamometer connected thereto; a first power supply connected to the first dynamometer, the second dynamometer, and the third dynamometer for providing power to the first dynamometer, the second dynamometer, and the third dynamometer and for transmitting and receiving data to the master controller; a second power supply connected to the hybrid electric drive unit for simulating changes in battery voltage and current of the hybrid electric drive unit during operation of the vehicle; a filter connected between the second power source and the hybrid electric drive unit for filtering an electric signal input from the second power source to the hybrid electric drive unit; a test module for performing electromagnetic compatibility testing on the hybrid electric drive unit.

1. A testing system for a hybrid electric drive unit of a vehicle, comprising:

2. 2. A vehicle hybrid electric drive unit testing system according to claim 1, comprising: The hybrid electric drive unit is provided with an insulating tool, and the hybrid electric drive unit is connected to the test table, the second dynamometer, and the third dynamometer based on the insulating tool.

1. A testing system for a hybrid electric drive unit of a vehicle, comprising:

3. 2. A vehicle hybrid electric drive unit testing system according to claim 1, comprising: a first capacitor and a first resistor are disposed between the test table and the ground, the capacitance value of the first capacitor is set based on the capacitance value between the white vehicle body and the ground, and the resistance value of the first resistor is set based on the resistance value between the white vehicle body and the ground; A second capacitor and a second resistor are disposed between the test table and the hybrid electric drive unit, the capacitance value of the second capacitor is set based on the capacitance value between the white vehicle body and the hybrid electric drive unit, and the resistance value of the second resistor is set based on the resistance value between the white vehicle body and the hybrid electric drive unit.

1. A testing system for a hybrid electric drive unit of a vehicle, comprising:

4. 2. A vehicle hybrid electric drive unit testing system according to claim 1, comprising: the test module includes a receiver, a probe, an antenna, a signal source, and a power amplifier, and the hybrid electric drive unit, the test table, the probe, the antenna, and the power amplifier are disposed on the interior side of a test chamber; The first dynamometer, the second dynamometer, the third dynamometer, the main control unit, the first power supply, the second power supply, the filter, the receiver, the power amplifier, and the signal source are disposed outside the test darkroom.

1. A testing system for a hybrid electric drive unit of a vehicle, comprising:

5. 1. A method for testing a hybrid electric drive unit of a vehicle, comprising: The invention is applied to a test system for a hybrid electric drive unit of a vehicle according to any one of claims 1 to 4, controlling the main control device to perform an operating condition load on the hybrid electric drive unit, the operating condition load including the hybrid electric drive unit outputting a rotational speed, the second dynamometer and the third dynamometer outputting a torque, the generator outputting a rotational speed, and the first dynamometer outputting a torque; and controlling the test module to perform an electromagnetic compatibility test on the hybrid electric drive unit in response to the hybrid electric drive unit completing a driving condition load.

1. A method for testing a hybrid electric drive unit of a vehicle, comprising:

6. 6. A method for testing a hybrid electric drive unit for a vehicle according to claim 5, comprising: Controlling the main control device to apply operating condition loads to the hybrid electric drive unit includes: and controlling the main control device to dynamically load the hybrid electric drive unit under driving conditions based on a CLTC curve of the light vehicle; The CLTC curve includes each operating state of the hybrid electric drive unit.

1. A method for testing a hybrid electric drive unit of a vehicle, comprising:

7. 6. A method for testing a hybrid electric drive unit for a vehicle according to claim 5, comprising: Controlling the main control device to apply operating condition loads to the hybrid electric drive unit includes: controlling the main controller to apply operating condition loads to the hybrid electric drive unit in response to an operating mode supported by the hybrid electric drive unit; The operating modes include a pure electric mode, a series mode, a parallel mode, or an energy recovery mode.

1. A method for testing a hybrid electric drive unit of a vehicle, comprising:

8. 1. A test device for a vehicle hybrid electric drive unit, comprising: The invention is applied to a test system for a hybrid electric drive unit of a vehicle according to any one of claims 1 to 4, a control unit for controlling the main control device to load operating conditions on the hybrid electric drive unit, the operating conditions including the hybrid electric drive unit outputting a rotational speed, the second dynamometer and the third dynamometer outputting a torque, the generator outputting a rotational speed, and the first dynamometer outputting a torque, a determining unit for determining whether the hybrid electric drive unit completes a load driving condition; The control unit is further configured to control the test module to perform an electromagnetic compatibility test on the hybrid electric drive unit in response to the hybrid electric drive unit completing a driving condition load.

1. A testing device for a hybrid electric drive unit of a vehicle, comprising:

9. 9. A testing device for a hybrid electric drive unit of a vehicle according to claim 8, comprising: the control unit controls the main control device based on a CLTC curve of a driving state of a light vehicle to dynamically load a driving condition on the hybrid electric drive unit, and controls the main control device to load a driving condition on the hybrid electric drive unit; The CLTC curve includes each operating state of the hybrid electric drive unit.

1. A testing device for a hybrid electric drive unit of a vehicle, comprising:

10. 9. A testing device for a hybrid electric drive unit of a vehicle according to claim 8, comprising: the control unit controls the main control device in accordance with an operation mode supported by the hybrid electric drive unit to load an operating condition on the hybrid electric drive unit, and controls the main control device to load an operating condition on the hybrid electric drive unit; The operating modes include a pure electric mode, a series mode, a parallel mode, or an energy recovery mode.

1. A testing device for a hybrid electric drive unit of a vehicle, comprising:

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