Method, device, processor and vehicle for testing a vehicle transmission

Abstract

The application discloses a kind of vehicle gearbox test method, device, processor and vehicle.The method comprises: obtaining the working condition simulation signal of the gearbox to be measured, wherein the working condition simulation signal is used to simulate the operating event of the gearbox to be measured, and the operating event is used to test the function to be measured of the gearbox to be measured;The working condition simulation signal is sent to the gearbox to be measured;Obtain the feedback signal returned by the gearbox to be measured in response to the working condition simulation signal, wherein the feedback signal is used to indicate the operation executed by the gearbox to be measured after responding to the operating event;Based on the feedback signal, determine the test result of the function to be measured, wherein the test result is used to characterize whether the function to be measured is effective.The application solves the technical problem of low test case coverage for testing the function of vehicle gearbox.

Description

Technical Field

[0001] This invention relates to the field of vehicles, and more specifically, to a method, apparatus, processor, and vehicle for testing vehicle transmissions. Background Technology

[0002] In related technologies, vehicle transmissions are mainly tested through bench testing and real vehicle testing. However, this method can only test the mechanical structure and assembly structure of the vehicle transmission, and it is difficult to achieve complete testing of the vehicle transmission's functions. This results in the technical problem of low test case coverage for testing the functions of the vehicle transmission.

[0003] There is currently no effective solution to the technical problem of low test case coverage in testing the functions of vehicle transmissions. Summary of the Invention

[0004] This invention provides a testing method, apparatus, processor, and vehicle for vehicle transmissions, to at least address the technical problem of low test case coverage when testing the functions of vehicle transmissions.

[0005] According to one aspect of the present invention, a testing method for a vehicle transmission is provided. The testing method may include: acquiring a simulated operating condition signal of the transmission under test, wherein the simulated operating condition signal is used to simulate operating events of the transmission under test, and the operating events are used to test a function under test of the transmission under test; sending the simulated operating condition signal to the transmission under test; acquiring a feedback signal returned by the transmission under test in response to the simulated operating condition signal, wherein the feedback signal is used to indicate the operation performed by the transmission under test after responding to the operating event; and determining a test result for the function under test based on the feedback signal, wherein the test result is used to characterize whether the function under test is effective.

[0006] Optionally, the function to be tested may include at least: the button unlocking function of the transmission under test, the shifting function of the transmission under test, and the automatic return to parking gear function of the transmission under test.

[0007] Optionally, the test method for the vehicle transmission further includes: when the function under test is a button unlock function, or when the function under test is a shift function, the operating condition simulation signal is used to simulate the shift lever of the transmission under test being pushed from the first gear position to the second gear position; when the function under test is an automatic return to parking gear function, the operating condition simulation signal is used to simulate the power system of the vehicle being powered down and the power system of the vehicle being powered down, or to simulate the vehicle door being in an open state.

[0008] Optionally, based on the feedback signal, the test result of the function under test is determined, including: in response to no feedback signal being received within the first target duration threshold, or a prompt message being received from the transmission under test within the first target duration threshold, the button unlock function is determined to be effective, wherein the prompt message is used to prompt the user to press the unlock button of the transmission under test.

[0009] Optionally, the test result of the function under test is determined based on the feedback signal, including: in response to receiving a feedback signal within the second target duration threshold range, and the feedback signal being consistent with the first reference signal, the shifting function is determined to be effective, wherein the first reference signal is used to characterize the working condition corresponding to the second gear position of the transmission under test.

[0010] Optionally, based on the feedback signal, the test result of the function under test is determined, including: in response to receiving a feedback signal within the third target duration threshold range, and the feedback signal being consistent with the second reference signal, it is determined that the automatic return to parking gear function is effective, wherein the second reference signal is used to characterize the gear position of the transmission under test being adjusted from the original position to the parking gear position.

[0011] Optionally, the feedback signal returned by the transmission under test in response to the operating condition simulation signal includes: simulating the operation event of the control unit of the transmission under test in response to the operating condition simulation signal, and obtaining the feedback signal.

[0012] According to one aspect of the present invention, a testing apparatus for a vehicle transmission is provided. The testing apparatus may include: a first acquisition unit, configured to acquire a simulated operating condition signal of the transmission under test, wherein the simulated operating condition signal is used to simulate an operating event of the transmission under test, and the operating event is used to test a function under test of the transmission under test; a sending unit, configured to send the simulated operating condition signal to the transmission under test; a second acquisition unit, configured to acquire a feedback signal returned by the transmission under test in response to the simulated operating condition signal, wherein the feedback signal is used to indicate the operation performed by the transmission under test after responding to the operating event; and a determination unit, configured to determine a test result of the function under test based on the feedback signal, wherein the test result is used to characterize whether the function under test is effective.

[0013] According to another aspect of the present invention, a processor is also provided. The processor is used to run a program, wherein the program, when run by the processor, executes the vehicle transmission testing method of the present invention.

[0014] According to another aspect of the present invention, a vehicle is also provided, which is used to perform the test method for the vehicle transmission of the present invention.

[0015] In this embodiment of the invention, a working condition simulation signal of the transmission under test is acquired, wherein the working condition simulation signal is used to simulate the operation events of the transmission under test, and the operation events are used to test the function under test of the transmission under test; the working condition simulation signal is sent to the transmission under test; a feedback signal returned by the transmission under test in response to the working condition simulation signal is acquired, wherein the feedback signal is used to indicate the operation performed by the transmission under test after responding to the operation event; based on the feedback signal, the test result of the function under test is determined, wherein the test result is used to characterize whether the function under test is effective. In other words, this embodiment of the invention uses a method that simulates the operating events of the transmission under test (TUT) by employing a simulated operating condition signal to test the TUT's functions. First, the acquired simulated operating condition signal is sent to the TUT. Then, the feedback signal generated by the TUT in response to the simulated operating condition signal is obtained. Finally, the operation performed by the TUT after responding to the operating event is determined based on the feedback signal, thereby judging whether the TUT's functions are effective. This achieves the goal of verifying the responsiveness and reaction method of a vehicle transmission under normal operating conditions, thus solving the technical problem of low test case coverage for testing vehicle transmission functions and achieving the technical effect of improving test case coverage for testing vehicle transmission functions. Attached Figure Description

[0016] The accompanying drawings, which are included to provide a further understanding of the invention and form part of this application, illustrate exemplary embodiments of the invention and, together with their description, serve to explain the invention and do not constitute an undue limitation thereof. In the drawings:

[0017] Figure 1 This is a flowchart of a test method for a vehicle transmission according to an embodiment of the present invention;

[0018] Figure 2 This is a schematic diagram of a controller communication architecture according to an embodiment of the present invention;

[0019] Figure 3 This is a schematic diagram of a hardware-in-the-loop test system according to an embodiment of the present invention;

[0020] Figure 4 This is a schematic diagram of a test apparatus for a vehicle transmission according to an embodiment of the present invention. Detailed Implementation

[0021] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0022] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0023] Example 1

[0024] According to an embodiment of the present invention, a testing method for a vehicle transmission is provided. It should be noted that the steps shown in the flowchart in the accompanying drawings can be executed in a computer system such as a set of computer-executable instructions. Furthermore, although a logical order is shown in the flowchart, in some cases, the steps shown or described may be executed in a different order than that shown here.

[0025] Figure 1 This is a flowchart of a test method for a vehicle transmission according to an embodiment of the present invention, such as... Figure 1 As shown, the method may include the following steps:

[0026] Step S101: Obtain the operating condition simulation signal of the transmission under test, wherein the operating condition simulation signal is used to simulate the operation events of the transmission under test, and the operation events are used to test the function under test of the transmission under test.

[0027] In the technical solution provided by step S101 of the present invention, a working condition simulation signal of the transmission under test can be generated by hardware-in-the-loop tools and simulation testing software. The working condition simulation signal can be used to simulate the operation events of the function under test of the transmission under test. The working condition simulation signal may include: simulated torque signal, simulated vehicle speed signal, simulated gear signal, simulated power-on signal, simulated door signal, etc. The operation events may include: the position change operation of the gear lever of the transmission under test, for example, pushing it from the parking gear position to the drive gear position. The operation events may also include: the operation of powering down the whole vehicle, for example, powering down the vehicle's power system or the vehicle's power supply system. The operation events may also include: the operation of changing the state of the door, for example, the vehicle's door state is open, etc. These are only examples and are not specifically limited.

[0028] For example, when testing the button unlocking function of the transmission under test, the operating condition simulation signal can be used to simulate the vehicle pushing the gear lever from the parking position to the drive position without pressing the unlock button.

[0029] Step S102: Send the operating condition simulation signal to the gearbox under test.

[0030] In the technical solution provided by step S102 of the present invention, after generating the operating condition simulation signal through hardware-in-the-loop tools and simulation test software, the operating condition simulation signal can be sent to the gearbox under test, and then the gearbox under test can be waited for to respond to the received operating condition simulation signal.

[0031] Step S103: Obtain the feedback signal returned by the simulated response condition signal of the gearbox under test.

[0032] In the technical solution provided in step S103 of the present invention, after the operating condition simulation signal is sent to the gearbox under test, the gearbox under test can respond to the received operating condition simulation signal and generate a feedback signal. Then, the simulation test software can obtain the feedback signal returned by the gearbox under test in response to the operating condition simulation signal. Based on the obtained feedback signal, the simulation test software can further determine the specific operation performed by the gearbox under test after responding to the operation event used to test the function under test. The feedback signal can be used to indicate the operation performed by the gearbox under test after responding to the operation event.

[0033] Optionally, the feedback signal can be used to indicate the specific operation performed by the transmission under test after responding to the operation event. The specific operation performed by the transmission under test after responding to the operation event can include the following situations: Situation 1: After the gear lever of the transmission under test is pushed from the parking gear position to the drive gear position, a button prompt is received from the transmission under test within a certain period of time; Situation 2: After the gear lever of the transmission under test is pushed from the parking gear position to the drive gear position, no button prompt is received from the transmission under test within a certain period of time; Situation 3: After the shift conditions are set, the gear signal changes to the other gear to be shifted to within a certain period of time; Situation 4: After the shift conditions are set... Case 5: After the vehicle's power system and electrical system are powered down, the gear signal automatically changes to park within a certain time. Case 6: After the vehicle's power system and electrical system are powered down, the gear signal does not automatically change to park within a certain time. Case 7: After the vehicle's doors are not closed and neither the brake nor accelerator pedals are pressed, the gear signal automatically changes to park within a certain time. Case 8: After the vehicle's doors are not closed and neither the brake nor accelerator pedals are pressed, the gear signal does not automatically change to park within a certain time. These are just examples and are not specific limitations.

[0034] Step S104: Based on the feedback signal, determine the test result of the function under test, wherein the test result is used to characterize whether the function under test is effective.

[0035] In the technical solution provided by step S104 of the present invention, after the simulation test software obtains the feedback signal returned by the transmission under test, the feedback signal is subjected to redundancy processing. That is, the signal content indicating redundant information in the feedback signal is deleted, and only the valid signal content that can provide test results is retained. Then, based on the feedback signal that has undergone redundancy processing, it is determined whether the current function under test is valid, that is, the test result of the function under test is determined, thereby achieving the purpose of verifying whether the reaction capability and reaction mode of the vehicle transmission meet expectations under normal working conditions.

[0036] Optionally, by extracting information from the redundantly processed feedback signal, the specific operation performed by the transmission under test after responding to the operation event can be obtained. Then, based on the obtained specific operation, the validity of the current function under test can be determined, thereby determining the test result. For example: if the obtained specific operation is that after the gear lever of the transmission under test is pushed from the parking position to the drive position, a button reminder is received from the transmission under test within a certain time, then the button unlocking function can be determined to be valid, thus determining the test result; if the obtained specific operation is that after the gear lever of the transmission under test is pushed from the parking position to the drive position, no button reminder is received from the transmission under test within a certain time, then the button unlocking function can be determined to be invalid, thus determining the test result; if... After setting the shift conditions, if the gear signal changes to the desired gear within a certain time, the shift function is considered effective, and the test result is determined accordingly. If, after setting the shift conditions, the gear signal does not change to the desired gear within a certain time, the shift function is considered ineffective, and the test result is determined accordingly. If, after the vehicle's power system and electrical system are powered down, the gear signal automatically changes to the parking gear within a certain time, the automatic return to parking gear function is considered effective, and the test result is determined accordingly. If, after the vehicle doors are open and neither the brake nor accelerator pedals are pressed, the gear signal automatically changes to the parking gear within a certain time, the automatic return to parking gear function is considered ineffective, and the test result is determined accordingly. These are merely illustrative examples and are not specific limitations.

[0037] In steps S101 to S104 of this application, the following steps are performed: 1. Obtaining a simulated operating condition signal of the transmission under test (TUT), wherein the simulated operating condition signal is used to simulate operating events of the TUT, and the operating events are used to test the TUT's function under test; 2. Sending the simulated operating condition signal to the TUT; 3. Obtaining a feedback signal returned by the TUT in response to the simulated operating condition signal, wherein the feedback signal is used to indicate the operation performed by the TUT after responding to the operating event; 4. Determining the test result of the TUT's function based on the feedback signal, wherein the test result is used to characterize whether the TUT's function is effective. In other words, this embodiment of the invention uses a method that simulates the operating events of the transmission under test (TUT) by employing a simulated operating condition signal to test the TUT's functions. First, the acquired simulated operating condition signal is sent to the TUT. Then, the feedback signal generated by the TUT in response to the simulated operating condition signal is obtained. Finally, the operation performed by the TUT after responding to the operating event is determined based on the feedback signal, thereby judging whether the TUT's functions are effective. This achieves the goal of verifying the responsiveness and reaction method of a vehicle transmission under normal operating conditions, thus solving the technical problem of low test case coverage for testing vehicle transmission functions and achieving the technical effect of improving test case coverage for testing vehicle transmission functions.

[0038] The method described in this embodiment will be further described below.

[0039] As an optional embodiment, the function under test includes at least: the button unlocking function of the transmission under test, the shifting function of the transmission under test, and the automatic return to parking gear function of the transmission under test.

[0040] In this embodiment, the function under test may include: a button unlocking function for the transmission under test, an operation prompting function for the transmission under test, a shifting function for the transmission under test, and an automatic return to parking gear function for the transmission under test. The button unlocking function of the transmission under test allows the transmission to shift gears only when the unlocking button is pressed. The shifting function of the transmission under test allows the transmission to shift from the current gear to the corresponding gear to be shifted when the shifting conditions are set. The automatic return to parking gear function of the transmission under test allows the transmission to automatically return to parking gear when the vehicle door is not closed and the brake pedal and accelerator pedal are not pressed.

[0041] As an optional embodiment, the testing method for the vehicle transmission further includes: when the function under test is a button unlocking function, or when the function under test is a shifting function, the operating condition simulation signal is used to simulate the shift lever of the transmission under test being pushed from the first gear position to the second gear position; when the function under test is an automatic return to parking gear function, the operating condition simulation signal is used to simulate the power system of the vehicle being powered down and the power system of the vehicle being powered down, or to simulate the vehicle door being in an open state.

[0042] In this embodiment, different operating condition simulation signals can be used to perform corresponding simulation operations to test different functions under test. When the function under test is a button unlocking function or a gear shifting function, hardware-in-the-loop tools and simulation testing software can be used to obtain the corresponding operating condition simulation signals of the transmission under test, thereby simulating the operation events used to test the button unlocking function or the gear shifting function. That is, simulating the gear lever of the transmission under test being pushed from the first gear position to the second gear position, thereby performing button unlocking function testing or gear shifting function testing to determine whether the button unlocking function or the gear shifting function is effective. When the function under test is an automatic return to parking gear function, hardware-in-the-loop tools and simulation testing software can be used to obtain the corresponding operating condition simulation signals of the transmission under test, thereby simulating the operation events used to test the automatic return to parking gear function. That is, simulating the power system and the power supply system of the vehicle being powered down, or simulating the vehicle door being in an open state, thereby performing automatic return to parking gear function testing to determine whether the automatic return to parking gear function is effective.

[0043] Optionally, the first gear position can be the original gear position before the corresponding simulation operation, and the second gear position can be another gear position to be changed to after the corresponding simulation operation.

[0044] As an optional embodiment, step S104, based on the feedback signal, determines the test result of the function under test, including: in response to not receiving a feedback signal within the first target duration threshold range, or receiving a prompt message from the transmission under test within the first target duration threshold range, the button unlock function is determined to be valid.

[0045] In this embodiment, when the function to be tested is the button unlock function, after performing the corresponding simulation operation, if no feedback signal is received within the first target duration threshold range, or if a prompt message is received from the transmission under test within the first target duration threshold range, it can be determined that the button unlock function is effective. The prompt message can be used to prompt the user to press the unlock button of the transmission under test.

[0046] Optionally, the first target duration threshold range can be the delay time set at the factory for the button unlock function. This delay time can be 100ms. That is, starting from the moment the gear lever is pushed, pressing the unlock button within the 100ms delay time will complete the gear shift. If the gear lever is not pushed when shifting gears and no feedback signal is received within the 100ms delay time, the button unlock function is considered valid. If the unlock button is not pressed after pushing the gear lever and a reminder to press the unlock button is received from the transmission under test within the 100ms delay time, the button unlock function is considered valid. This achieves the purpose of testing whether the vehicle's transmission response capability and response method meet expectations under normal operating conditions.

[0047] As an optional embodiment, step S104, based on the feedback signal, determines the test result of the function under test, including: in response to receiving a feedback signal within the second target duration threshold range, and the feedback signal being consistent with the first reference signal, it is determined that the shifting function is effective.

[0048] In this embodiment, when the function under test is a gear shifting function, after performing the corresponding simulated gear shifting operation, if the gearbox under test changes from its original operating condition to the operating condition corresponding to the second gear position, that is, if a feedback signal is received within the second target duration threshold range and the feedback signal is consistent with the first reference signal, it can be determined that the gear shifting function is effective, thereby determining the test result of the gear shifting function. The first reference signal can be used to characterize the operating condition of the gearbox under test in the second gear position.

[0049] Optionally, the second target duration threshold range can be the delay time set at the factory for the shift function, which can be 60ms. For example, when it is necessary to shift the gear from reverse to park, a corresponding simulated shift operation is performed. If the gear shifts from reverse to park within 60ms of the delay time, that is, the gearbox under test changes from its original operating condition to the operating condition corresponding to the second gear position, and the feedback signal is consistent with the first reference signal, then the shift function is determined to be effective. If the gear shifts from reverse to park within 60ms of the delay time, that is, the gearbox under test does not change from its original operating condition to the operating condition corresponding to the second gear position, and the feedback signal is not consistent with the first reference signal, then the shift function is determined to be ineffective. This achieves the purpose of verifying whether the vehicle's gearbox responsiveness and response mode meet expectations under normal operating conditions.

[0050] As an optional embodiment, step S104, based on the feedback signal, determines the test result of the function under test, including: in response to receiving a feedback signal within the third target duration threshold range, and the feedback signal being consistent with the second reference signal, it is determined that the automatic return to parking gear function is effective.

[0051] In this embodiment, when the function under test is the automatic return to parking gear function, after performing the corresponding simulation operation, if the gear position of the transmission under test is adjusted from the original position to the parking gear position, that is, if a feedback signal is received within the third target duration threshold range and the feedback signal is consistent with the second reference signal, then the above situation is responded to, that is, the automatic return to parking gear function is determined to be effective, thereby determining the test result of the automatic return to parking gear function. The second reference signal can be used to characterize the gear position of the transmission under test being adjusted from the original position to the parking gear position.

[0052] Optionally, the third target duration threshold range can be the delay time set at the factory for the automatic return to parking function. This delay time can be 120ms. For example, when the vehicle needs to perform automatic parking, a corresponding simulation operation is performed. If the vehicle starts to perform automatic parking within the 120ms delay time, that is, the gear of the transmission under test is adjusted from the original position to the parking gear, and the feedback signal is consistent with the second reference signal, then the automatic return to parking function is determined to be effective. If the vehicle does not start to perform automatic parking within the 120ms delay time, that is, the gear of the transmission under test is not adjusted from the original position to the parking gear, and the feedback signal is not consistent with the second reference signal, then the automatic return to parking function is determined to be ineffective. This achieves the purpose of testing whether the vehicle transmission's responsiveness and response mode meet expectations under normal operating conditions.

[0053] As an optional embodiment, step S103, obtaining the feedback signal returned by the transmission under test in response to the operating condition simulation signal, includes: simulating the control unit operation event of the transmission under test in response to the operating condition simulation signal, and obtaining the feedback signal.

[0054] In this embodiment, different operating condition simulation signals can be obtained through hardware-in-the-loop tools and simulation testing software. Then, based on the different operating condition simulation signals, the control unit of the transmission under test can be simulated to operate corresponding types of operation events. The transmission under test receives the operating condition simulation signal and responds to it, that is, it responds to the operation events simulated by the operating condition simulation signal. As a result, the transmission under test generates and returns a feedback signal, so that the simulation testing software can obtain the feedback signal returned by the transmission under test in response to the operating condition simulation signal.

[0055] In this embodiment of the invention, different operating condition simulation signals can be used to perform corresponding simulation operations for different functions under test. Then, the feedback signal returned in response to the operating condition simulation signal is obtained, and it is judged whether the feedback signal is consistent with the corresponding reference signal. This determines whether the function under test is effective, thereby solving the technical problem of low test case coverage for testing the functions of vehicle transmissions and achieving the technical effect of improving the test case coverage for testing the functions of vehicle transmissions.

[0056] Example 2

[0057] The technical solutions of the embodiments of the present invention will be illustrated below with reference to preferred embodiments.

[0058] With economic development and the continuous improvement of people's living standards, vehicles are no longer just a daily means of transportation, but also increasingly diversified to meet the changing needs of users. However, with the updating and iteration of the electronic and electrical functions of vehicle transmissions, the difficulties and challenges faced in functional testing of vehicle transmissions are also increasing. Common testing schemes mainly focus on testing the mechanical and assembly structures of vehicle transmissions, but there is a lack of complete test analysis and sufficient test cases for functional testing of vehicle transmissions, thus failing to improve the test case coverage for functional testing of vehicle transmissions.

[0059] Therefore, to overcome the above problems, a related technology discloses a transmission testing method and test bench. This method uses an engine matched to the transmission under test to simulate the vehicle environment, providing a power source for the transmission. A retarder absorbs the kinetic energy of the transmission, and the engine, transmission, and retarder are connected to a single test platform via communication. However, this transmission testing method only reduces equipment costs for manufacturers by connecting the engine, transmission, and retarder to a single test platform; it does not test the electronic and electrical functions of the vehicle transmission.

[0060] In another related technology, a testing method for an automatic transmission (AT) is disclosed. This method includes: detecting the no-load power loss of the AT transmission under test; performing practical performance tests on a bench for each gear under hydraulic conditions; performing tests on each gear under mechanical conditions; detecting the normality of the "speed-flow-pressure" relationship of the hydraulic pump at different speeds; and checking the normality of the oil circuits of all control components. However, this testing method only performs fault tests under hydraulic and mechanical conditions and does not test the electronic and electrical functions of the vehicle's transmission.

[0061] However, this invention proposes a testing method for vehicle transmissions. This testing method can perform a complete test and analysis of the electronic and electrical functions of the vehicle transmission through simulation, thereby verifying whether the responsiveness and response mode of the vehicle transmission meet expectations under normal operating conditions. This solves the technical problem of low test case coverage for testing the functions of vehicle transmissions, thus improving the test case coverage for testing the functions of vehicle transmissions.

[0062] Figure 2 This is a schematic diagram of a controller communication architecture according to an embodiment of the present invention, such as... Figure 2 As shown, the controller communication architecture may include: engine control unit 201, transmission control unit 202, automatic transmission 203, gateway 204, adventure vehicle model 205, and vehicle electronic stability control unit 206.

[0063] Optionally, the engine control unit 201 can be used to communicate with the transmission control unit 202 and the gateway 204; the gateway 204 can be used to communicate with the adventure vehicle 205 and the vehicle electronic stability control unit 206.

[0064] Figure 3 This is a schematic diagram of a hardware-in-the-loop test system according to an embodiment of the present invention, such as... Figure 3 As shown, the hardware-in-the-loop test system may include: an experimental management system 301, test software 302, a fault injection board 303, a real-time simulation model 304, an input / output wiring layer 305, a bus 306, a signal conditioning unit 307, a load simulation unit 308, a connector 309, and a controller 310.

[0065] Optionally, the real-time simulation model 304 can be used to communicate with the experimental management system 301 and the test software 302; the fault injection board 303 can be used to create electrical faults such as open circuits and short circuits for hard-wired signals, and to send the fault response signal to the input / output wiring layer 305 through the load simulation unit 308; the input / output wiring layer 305 can be used to send the analog signal output by the real-time simulation model 304 to the fault injection board 303 through the signal conditioning unit 307; the bus 306 can be used to send the analog signal output by the real-time simulation model 304 to the fault injection board 303; and the connector 309 can be used to communicate with the fault injection board 303 and the controller 310.

[0066] Optionally, the hardware-in-the-loop test system described above can be used to test the following functions: test the shift logic function, test the function of automatically returning the gear to the parking gear, and test the shift function in fully automatic parking mode.

[0067] The function of testing the shift logic can include: testing the effectiveness of the unlock button during shifting, testing the effectiveness of the parking gear button, testing the logic during the shifting operation, and testing the correctness of the shifting operation prompts.

[0068] The effectiveness of the unlock button during gear shifting can be tested as follows: Modify the gear lever position signal through the test interface software. Through communication between the host computer and the hardware-in-the-loop test system, the board simulates the gear lever position signal and sends it to the automatic transmission controller, causing the gear lever to be pushed from the parking position to the drive position. At the same time, an unlock command is sent 100ms. Observe the prompt signal sent by the automatic transmission controller to the instrument panel. If the prompt signal is "Please press the unlock button to shift gears", the delay time is less than 100ms. If the shift is successful, the delay time is greater than 100ms. Repeated testing can determine the delay time of the unlock button.

[0069] The effectiveness of the parking gear button can be tested as follows: First, set the gear to forward or reverse, set the parking gear button press time to 60ms, and observe whether the gear remains in the original gear or shifts into parking. If the gear shifts into parking, the parking gear button is effective and the test is passed. If the gear remains in the original gear, the parking gear button is ineffective.

[0070] The logic of the gear shifting operation can be tested as follows: Modify the operating condition simulation signal to meet the shifting conditions from parking gear to reverse gear. The shifting conditions can be: press the unlock button + depress the brake + push the gear shift lever forward to the reverse gear position + do not press the accelerator. Observe whether the gear shifts to reverse gear. If it shifts to reverse gear, the shifting logic is correct and the test passes. If it does not shift to reverse gear and there are other prompts, the shifting logic is incorrect. Similarly, other shifting logics can be tested in the same way to determine whether the corresponding shifting logic is correct.

[0071] The correctness of the gear shift operation prompts can be tested as follows: By modifying the operating condition simulation signal, set the current vehicle driving condition as follows: Unlock button not pressed + brake applied + shift lever pushed forward to reverse position + accelerator not pressed. If the instrument display receives a prompt message "Press unlock button to shift gears," the gear shift operation prompt is correct and the test passes. If the instrument display does not receive a prompt message "Press unlock button to shift gears," the gear shift operation prompt is incorrect. Similarly, the required accelerator, brake, and vehicle speed conditions can all be tested using the above method to check the correctness of the corresponding prompts. Ultimately, the priority of the gear shift operation prompts can be obtained, which is: Unlock button > Prompt to apply brake > Prompt to stop > Prompt to reduce speed > Prompt to release accelerator.

[0072] Testing the automatic gear shift back to parking gear function can include: testing the automatic shift back to parking gear after the vehicle is turned off, testing the automatic shift back to parking gear after the driver leaves, and testing the function of maintaining the original gear if the conditions for automatic shift back to parking gear are not met.

[0073] The function of automatically returning to park after the vehicle is turned off can be tested as follows: First, modify the ignition signal sent to the automatic transmission controller, then power off the vehicle. Observe whether the gear automatically shifts to park. If the gear automatically shifts to park, the function of automatically returning to park after the vehicle is turned off is effective. If the gear does not automatically shift to park, the function of automatically returning to park after the vehicle is turned off is ineffective.

[0074] The automatic return to park function after the driver leaves can be tested as follows: Modify the door and seatbelt signals to be "on" and the accelerator and brake signals to be "not pressed". Observe whether the gear automatically returns to park. If the gear automatically changes to park, the automatic return to park function is effective. If the gear does not automatically change to park, the automatic return to park function is ineffective.

[0075] The test to maintain the original gear position when the automatic return to parking gear condition is not met can be performed as follows: Set the door signal, seat belt signal, accelerator / brake signal, and vehicle speed signal to indicate that the automatic return to parking gear condition is not met, and observe whether the gear position remains unchanged. If the gear position remains unchanged, the automatic return to parking gear position maintenance function is effective; if the gear position does not remain unchanged, the automatic return to parking gear position maintenance function is ineffective.

[0076] The gear shifting function in fully automatic parking mode can be tested as follows: First, ensure the test state is fault-free or has no historical faults. Modify the enable signal for the response request via the host computer. After receiving this enable signal, the automatic transmission controller can respond to the request. Then, the gear shifting command will be fully controlled by the electronic stability control unit. By modifying the gear shifting request signal of the electronic stability control unit, observe whether the current gear shifts to park, drive, or reverse according to the gear shifting request signal. If the current gear shifts to park, drive, or reverse according to the gear shifting request signal, the gear shifting function in fully automatic parking mode is effective. If the current gear does not shift to park, drive, or reverse according to the gear shifting request signal, the gear shifting function in fully automatic parking mode is ineffective. Similarly, the automatic return to park function in fully automatic parking mode can be tested using the above method.

[0077] In this embodiment, a real-time simulation model is used to simulate the operational events of the function under test (DUT) for testing the transmission. This allows for the acquisition of a simulated operating condition signal, which is then sent to the transmission. The controller then directs the transmission to execute the operation corresponding to the simulated operating condition signal. After completing the operation, the real-time simulation model receives a feedback signal from the transmission in response. Finally, based on this feedback signal, the validity of the DUT is determined. This solves the technical problem of low test case coverage for testing the functions of vehicle transmissions, achieving the technical effect of improving the test case coverage for testing the functions of vehicle transmissions.

[0078] Example 3

[0079] According to an embodiment of the present invention, a testing apparatus for a vehicle transmission is also provided. It should be noted that this testing apparatus for a vehicle transmission can be used to perform a testing method for a vehicle transmission as described in Embodiment 1.

[0080] Figure 4 This is a schematic diagram of a testing apparatus for a vehicle transmission according to an embodiment of the present invention. Figure 4 As shown, a vehicle transmission testing device 400 may include: a first acquisition unit 401, a sending unit 402, a second acquisition unit 403, and a determination unit 404.

[0081] The first acquisition unit 401 is used to acquire the operating condition simulation signal of the transmission under test, wherein the operating condition simulation signal is used to simulate the operation events of the transmission under test, and the operation events are used to test the function under test of the transmission under test.

[0082] The transmitting unit 402 is used to send the operating condition simulation signal to the gearbox under test.

[0083] The second acquisition unit 403 is used to acquire the feedback signal returned by the simulated signal of the transmission under test response condition, wherein the feedback signal is used to indicate the operation performed by the transmission under test after responding to the operation event.

[0084] The determining unit 404 is used to determine the test result of the function under test based on the feedback signal, wherein the test result is used to characterize whether the function under test is effective.

[0085] Optionally, the function to be tested may include at least: the button unlocking function of the transmission under test, the shifting function of the transmission under test, and the automatic return to parking gear function of the transmission under test.

[0086] Optionally, the vehicle transmission testing device 400 may further include: a first simulation unit, used to simulate the shift lever of the transmission under test being pushed from the first gear position to the second gear position when the function under test is a button unlock function or a shift function; and a second simulation unit, used to simulate the power system and power system of the vehicle being powered down when the function under test is an automatic return to parking gear function, or to simulate the vehicle door being in an open state.

[0087] Optionally, the determining unit 404 may include: a first response module, configured to determine that the button unlocking function is valid in response to no feedback signal being received within the first target duration threshold range, or to receive a prompt message from the transmission under test within the first target duration threshold range, wherein the prompt message is used to prompt the user to press the unlock button of the transmission under test.

[0088] Optionally, the determining unit 404 may include: a second response module, configured to determine that the shift function is valid in response to receiving a feedback signal within the second target duration threshold range and the feedback signal being consistent with the first reference signal, wherein the first reference signal is used to characterize the working condition corresponding to the second gear position of the transmission under test.

[0089] Optionally, the determining unit 404 may include: a third response module, which determines that the automatic return to parking gear function is effective in response to receiving a feedback signal within the third target duration threshold range and the feedback signal being consistent with the second reference signal, wherein the second reference signal is used to characterize that the gear position of the transmission under test is adjusted from the original position to the parking gear position.

[0090] Optionally, the second acquisition unit 403 may include: an acquisition module, used to acquire feedback signals in response to the operating condition simulation signal simulating the control unit operation event of the transmission under test.

[0091] In this embodiment, a first acquisition unit is used to acquire a working condition simulation signal of the transmission under test, wherein the working condition simulation signal is used to simulate the operation events of the transmission under test, and the operation events are used to test the function under test of the transmission under test; a sending unit is used to send the working condition simulation signal to the transmission under test; a second acquisition unit is used to acquire a feedback signal returned by the transmission under test in response to the working condition simulation signal, wherein the feedback signal is used to indicate the operation performed by the transmission under test after responding to the operation event; and a determination unit is used to determine the test result of the function under test based on the feedback signal, wherein the test result is used to characterize whether the function under test is effective. This solves the technical problem of low test case coverage for testing the functions of vehicle transmissions and achieves the technical effect of improving the test case coverage for testing the functions of vehicle transmissions.

[0092] Example 4

[0093] According to an embodiment of the present invention, a processor is also provided for running a program, wherein the program is executed by the processor to perform the vehicle transmission test method of Embodiment 1.

[0094] Example 5

[0095] According to an embodiment of the present invention, a vehicle is also provided for performing any of the vehicle transmission test methods in Embodiment 1.

[0096] The sequence numbers of the above embodiments of the present invention are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments.

[0097] In the above embodiments of the present invention, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0098] In the several embodiments provided in this application, it should be understood that the disclosed technical content can be implemented in other ways. The device embodiments described above are merely illustrative; for example, the division of units can be a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the displayed or discussed mutual couplings, direct couplings, or communication connections may be through some interfaces; indirect couplings or communication connections between units or modules may be electrical or other forms.

[0099] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0100] Furthermore, the functional units in the various embodiments of the present invention can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit.

[0101] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this invention, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods of the various embodiments of this invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, read-only memory (ROM), random access memory (RAM), portable hard drives, magnetic disks, or optical disks.

[0102] The above are merely preferred embodiments of the present invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A test method for a vehicle transmission, characterized in that, include: Acquire operating condition simulation signals of the transmission under test, wherein the operating condition simulation signals are used to simulate operating events of the transmission under test, and the operating events are used to test the function under test of the transmission under test; The operating condition simulation signal is sent to the gearbox under test; Obtain the feedback signal returned by the transmission under test in response to the operating condition simulation signal, wherein the feedback signal is used to indicate the operation performed by the transmission under test after responding to the operation event; Based on the feedback signal, the test result of the function under test is determined, wherein the test result is used to characterize whether the function under test is effective; The functions to be tested include: the button unlocking function of the transmission under test and the shifting function of the transmission under test; The method further includes: when the function under test is the button unlocking function, or when the function under test is the gear shifting function, the operating condition simulation signal is used to simulate the gear lever of the transmission under test being pushed from the first gear position to the second gear position; Based on the feedback signal, the test result of the function under test is determined, including: in response to the fact that no feedback signal is received within a first target duration threshold range, or a prompt message is received from the transmission under test within the first target duration threshold range, the button unlocking function is determined to be valid, wherein the prompt message is used to prompt the user to press the unlock button of the transmission under test; in response to the fact that the feedback signal is received within a second target duration threshold range, and the feedback signal is consistent with a first reference signal, the shifting function is determined to be valid, wherein the first reference signal is used to characterize the operating condition of the transmission under test in the second gear position.

2. The method according to claim 1, characterized in that, The function to be tested also includes: The automatic return to parking gear function of the transmission under test.

3. The method according to claim 2, characterized in that, The method further includes: When the function to be tested is the automatic return to parking position function, the operating condition simulation signal is used to simulate the power system of the vehicle being powered down and the power supply system of the vehicle being powered down, or to simulate the vehicle door being in an open state.

4. The method according to claim 3, characterized in that, Based on the feedback signal, the test result of the function under test is determined, including: In response to receiving the feedback signal within the third target duration threshold range, and the feedback signal being consistent with the second reference signal, it is determined that the automatic return to parking gear function is effective, wherein the second reference signal is used to characterize that the gear position of the transmission under test has been adjusted from the original position to the parking gear position.

5. The method according to claim 1, characterized in that, Acquiring the feedback signal returned by the transmission under test in response to the simulated operating condition signal, including: The control unit of the transmission under test is simulated to operate the operation event in response to the operating condition simulation signal, and the feedback signal is obtained.

6. A testing device for a vehicle transmission, characterized in that, include: The first acquisition unit is used to acquire the operating condition simulation signal of the transmission under test, wherein the operating condition simulation signal is used to simulate the operation events of the transmission under test, and the operation events are used to test the function under test of the transmission under test. A transmitting unit is used to transmit the operating condition simulation signal to the gearbox under test; The second acquisition unit is used to acquire the feedback signal returned by the transmission under test in response to the operating condition simulation signal, wherein the feedback signal is used to indicate the operation performed by the transmission under test after responding to the operation event; A determining unit is configured to determine the test result of the function under test based on the feedback signal, wherein the test result is used to characterize whether the function under test is effective; The functions to be tested include: the button unlocking function of the transmission under test and the shifting function of the transmission under test; The device is also used to perform the following steps: when the function under test is the button unlocking function, or when the function under test is the shifting function, the operating condition simulation signal is used to simulate the gear lever of the transmission under test being pushed from the first gear position to the second gear position. The determining unit is further configured to perform the following steps: in response to not receiving the feedback signal within a first target duration threshold range, or receiving a prompt message from the transmission under test within the first target duration threshold range, the button unlocking function is determined to be valid, wherein the prompt message is used to prompt the user to press the unlock button of the transmission under test; in response to receiving the feedback signal within a second target duration threshold range, and the feedback signal being consistent with the first reference signal, the shifting function is determined to be valid, wherein the first reference signal is used to characterize the operating condition of the transmission under test being in the second gear position.

7. A processor, characterized in that, The processor is used to run a program, wherein the program is executed by the processor to perform the method according to any one of claims 1 to 5.

8. A vehicle, characterized in that, The vehicle is used to perform the test method for the vehicle transmission as described in any one of claims 1 to 5.

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