Transmission oil pump noise test and evaluation method and device, vehicle and storage medium

Abstract

The invention relates to the technical field of transmission oil pump noise testing, in particular to a transmission oil pump noise testing and evaluating method and device, a vehicle and a storage medium. Controlling the test vehicle to run in the target mode, and obtaining the speed changer oil pump rotating speed in the running process of the test vehicle and the noise sound pressure collected by the sound sensor; generating a noise difference curve of the total noise in the vehicle and the main order noise of the oil pump noise according to the transmission oil pump rotating speed and the noise sound pressure, and generating an oil pump noise evaluation result of the transmission according to the noise difference curve, the noise difference curve is a corresponding relation curve of the transmission oil pump rotating speed and the noise difference between the total noise in the vehicle and the main order noise of the oil pump noise. Therefore, the problems of limited transmission oil pump noise test conditions and the like in the prior art are solved.

Description

Technical Field

[0001] This application relates to the field of transmission oil pump noise testing technology, and in particular to a method, apparatus, vehicle, and storage medium for testing and evaluating transmission oil pump noise. Background Technology

[0002] Current transmission oil pump noise testing primarily relies on individual bench testing. However, this testing requires specialized equipment such as anechoic chambers and oil pressure, temperature, and speed control systems. This results in limitations on the testing conditions for transmission oil pump noise, causing a disconnect between the test conditions and real-world user scenarios. The measured noise data cannot reflect the true performance of the oil pump in a fully integrated vehicle configuration. Furthermore, the testing is costly and inefficient, failing to meet the rapid verification needs of practical applications. Summary of the Invention This application provides a method, apparatus, vehicle, storage medium, and product for testing and evaluating transmission oil pump noise, in order to solve the problems of limited testing conditions for transmission oil pump noise in related technologies, which cause the test conditions to be out of touch with the user's actual usage scenarios, and the measured noise data cannot reflect the true performance of the oil pump in the integrated state of the whole vehicle. In addition, the test cost is high and the efficiency is low, making it difficult to meet the rapid verification needs in practical applications.

[0003] The first aspect of this application provides a method for testing and evaluating transmission oil pump noise, comprising the following steps: controlling the transmission of a test vehicle to be placed in a target mode; controlling the test vehicle to run in the target mode, acquiring the transmission oil pump speed and the noise sound pressure collected by the sound sensor during the operation of the test vehicle; generating a noise difference curve between the total noise inside the vehicle and the main order noise of the oil pump based on the transmission oil pump speed and the noise sound pressure; and generating an evaluation result of the transmission oil pump noise based on the noise difference curve, wherein the noise difference curve is a curve showing the correspondence between the transmission oil pump speed and the noise difference between the total noise inside the vehicle and the main order noise of the oil pump.

[0004] Based on the aforementioned technical means, this application embodiment uses the whole vehicle as the core testing carrier. By precisely controlling the transmission to be in the target mode to lock the oil pump test scenario, key data such as transmission oil pump speed and noise sound pressure captured by the sound sensor are collected simultaneously. Then, the difference curve between the total noise in the vehicle and the main order noise of the oil pump is generated with the oil pump speed as the correlation dimension. Finally, it is directly converted into the transmission oil pump noise evaluation result. This constructs a complete technical closed loop of locking the target working condition mode, collecting core parameter data, analyzing noise difference information, and outputting accurate evaluation conclusions. It effectively overcomes the problem of limited testing conditions for transmission oil pump noise in related technologies, and at the same time makes the test results more consistent with the actual working scenario of the oil pump, improving the accuracy and practicality of the evaluation.

[0005] Optionally, the target mode can be the target gear in manual mode.

[0006] Based on the above technical means, in the manual mode of this application embodiment, the target gear can directly fix the load and speed range of the oil pump, replacing the parameter adjustment function of the special equipment in the bench test in the related technology. Therefore, without the need for complex conditions such as anechoic chambers and special control equipment, other noise interference can be isolated in the whole vehicle scenario and the oil pump noise itself can be focused, thus overcoming the problem of limited test conditions for transmission oil pump noise in the related technology.

[0007] Optionally, the test vehicle is controlled to operate in target mode to obtain the transmission oil pump speed and noise pressure collected by the sound sensor during the operation of the test vehicle, including: controlling the engine of the test vehicle to operate within the target speed range; controlling the engine speed of the test vehicle to increase after detecting that the driver has pressed the accelerator pedal; and obtaining the transmission oil pump speed and noise pressure collected by the sound sensor during the operation of the test vehicle until the engine is operating within the target speed range after detecting that the driver has released the accelerator pedal.

[0008] Based on the aforementioned technical means, this embodiment of the application first limits the engine speed of the test vehicle to a target range, and then, in conjunction with the driver's operation of pressing and releasing the accelerator pedal, controls the engine speed to complete the process of rising and falling back to the target range. Transmission oil pump speed and noise sound pressure data are collected only when the engine returns to the target speed range. By linking the vehicle's own engine speed control with throttle operation, the function of dedicated speed control equipment in bench testing in related technologies is replaced. This ensures that the oil pump is under stable and uniform testing conditions during data collection, and eliminates the need for complex dedicated equipment. Combined with the subsequent analysis logic of the noise difference curve, other noise interference can be accurately isolated. Ultimately, effective testing and evaluation of oil pump noise can be achieved in a vehicle scenario without an anechoic chamber or dedicated control equipment, overcoming the limitations of transmission oil pump noise testing conditions in related technologies.

[0009] Optionally, the sound sensor can be placed in the driver's inner ear.

[0010] Based on the aforementioned technical means, this embodiment places the sound sensor in the driver's inner ear, directly capturing the noise sound pressure in the actual driving scenario, ensuring that the collected noise data closely matches the subjective auditory perception of the human body. By collecting data close to the core auditory area of ​​the driver and passengers, the actual impact of fuel pump noise on the driving experience can be accurately captured without relying on an anechoic chamber to isolate environmental interference and correct data deviations. Combined with subsequent steps such as engine speed control, target gear locking, and noise difference curve analysis, the main order noise of the fuel pump can be accurately isolated in the natural test scenario of the whole vehicle, eliminating the need for complex environmental control and data correction steps, effectively improving the pertinence of noise testing and the practical value of the evaluation results.

[0011] Optionally, a noise difference curve between the total in-vehicle noise and the main order noise of the oil pump is generated based on the transmission oil pump speed and noise sound pressure. This includes: generating a first working curve for the amplitude of multiple main order noises of the oil pump based on the transmission oil pump speed and noise sound pressure; using the transmission oil pump speed as the horizontal axis and the envelope curve of the first working curve as the second working curve; obtaining the amplitude of the total in-vehicle noise of the test vehicle; and generating a third working curve for the amplitude of the total in-vehicle noise with the transmission oil pump speed as the horizontal axis and the total in-vehicle noise amplitude as the vertical axis; and generating a noise difference curve based on the second and third working curves.

[0012] Based on the aforementioned technical means, this embodiment first generates a first working curve based on the transmission oil pump speed and noise sound pressure to obtain multiple primary-order noise amplitude values ​​of the oil pump. Then, a second working curve is obtained by taking the envelope to focus on the core noise contribution of the oil pump. Simultaneously, a third working curve is generated with speed as the horizontal axis and total noise amplitude as the vertical axis. Finally, a noise difference curve is generated by calculating the correlation between the second and third working curves. Through the technical logic of multi-curve construction and difference analysis, the interference of other noise sources in the vehicle on the oil pump noise is isolated from the data, replacing the need for physical noise reduction using an anechoic chamber in related tests. Combined with the locking of operating conditions and precise data acquisition in the whole vehicle scenario, complex environmental control and specialized equipment are not required, simplifying the testing process and significantly improving the accuracy of oil pump noise separation and the reliability of evaluation results.

[0013] Optionally, generating a transmission oil pump noise evaluation result based on the noise difference curve includes: obtaining a noise evaluation threshold for the noise difference curve; identifying at least one of acceptable oil pump noise and unacceptable noise from the noise difference curve based on the noise evaluation threshold; and generating a transmission oil pump noise evaluation result based on at least one of the acceptable oil pump noise and unacceptable noise.

[0014] Based on the aforementioned technical means, this application embodiment first obtains the noise evaluation threshold corresponding to the noise difference curve, and then accurately identifies at least one of acceptable and unacceptable oil pump noise from the noise difference curve based on this threshold, ultimately generating a transmission oil pump noise evaluation result. Through the quantitative evaluation logic of threshold setting and curve matching, it replaces the evaluation method that relies on dedicated calibration equipment or subjective experience judgment in related tests, achieving clear classification of oil pump noise without additional complex auxiliary equipment. Combined with precise data acquisition and noise separation technology in the whole vehicle scenario, it simplifies the evaluation process, lowers the operational threshold, and significantly improves the objectivity of the oil pump noise evaluation results.

[0015] A second aspect of this application provides a transmission oil pump noise testing and evaluation device, comprising: a control module for controlling the transmission of a test vehicle to be placed in a target mode; an acquisition module for controlling the test vehicle to operate in the target mode and acquiring the transmission oil pump speed and noise sound pressure collected by a sound sensor during the operation of the test vehicle; and a generation module for generating a noise difference curve between the total in-vehicle noise and the main order noise of the oil pump based on the transmission oil pump speed and the noise sound pressure, and generating a transmission oil pump noise evaluation result based on the noise difference curve, wherein the noise difference curve is a correspondence curve between the transmission oil pump speed and the noise difference between the total in-vehicle noise and the main order noise of the oil pump.

[0016] Optionally, the target mode can be the target gear in manual mode.

[0017] Optionally, the acquisition module is further used to control the engine of the test vehicle to operate within the target speed range; after detecting that the driver has pressed the accelerator pedal, it controls the engine speed of the test vehicle to increase; after detecting that the driver has released the accelerator pedal, until the engine is operating within the target speed range, it acquires the transmission oil pump speed and the noise pressure collected by the sound sensor during the operation of the test vehicle.

[0018] Optionally, the sound sensor can be placed in the driver's inner ear.

[0019] Optionally, the generation module is further configured to generate a first working curve of multiple primary order noise amplitudes of the oil pump based on the transmission oil pump speed and noise sound pressure; take the transmission oil pump speed as the horizontal axis and the envelope curve of the first working curve as the second working curve; obtain the total in-vehicle noise amplitude of the test vehicle; take the transmission oil pump speed as the horizontal axis and the total in-vehicle noise amplitude as the vertical axis to generate a third working curve of the total in-vehicle noise amplitude; and generate a noise difference curve based on the second working curve and the third working curve.

[0020] Optionally, the generation module is further used to obtain a noise evaluation threshold for the noise difference curve; identify at least one of acceptable oil pump noise and unacceptable noise from the noise difference curve based on the noise evaluation threshold; and generate an oil pump noise evaluation result for the transmission based on at least one of the acceptable oil pump noise and unacceptable noise.

[0021] The third aspect of this application provides a vehicle in which the transmission oil pump noise is tested and evaluated using the transmission oil pump noise testing and evaluation method described above.

[0022] A fourth aspect of this application provides a computer-readable storage medium having a computer program stored thereon, which is executed by a processor to implement the transmission oil pump noise testing and evaluation method as described in the above embodiments.

[0023] A fifth aspect of this application provides a computer program that, when executed, is used to implement the transmission oil pump noise testing and evaluation method as described in the above embodiments.

[0024] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0025] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the following description of the embodiments taken in conjunction with the accompanying drawings, wherein: Figure 1 This is a flowchart of a method for testing and evaluating transmission oil pump noise according to an embodiment of this application; Figure 2 This is a flowchart of a method for testing and evaluating transmission oil pump noise according to another embodiment of this application; Figure 3 This is a block diagram illustrating a transmission oil pump noise testing and evaluation device according to an embodiment of this application. Detailed Implementation

[0026] The embodiments of this application are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application.

[0027] As a crucial component of automobiles, the noise performance of transmissions is receiving increasing attention. The transmission oil pump, as the power source for establishing oil pressure within the transmission, directly impacts the overall noise performance of the transmission. However, noise testing and evaluation methods related to oil pump design are difficult to master, making the need for such methods increasingly urgent. Currently, transmission oil pump noise testing and evaluation primarily rely on individual pump bench testing. This testing is limited by stringent conditions, requiring an anechoic chamber and specialized equipment for controlling oil pressure, temperature, and speed; otherwise, it cannot be conducted. Current conditions often lack the necessary support for transmission oil pump development and the experimental conditions required for individual pump noise testing and evaluation, making it difficult to conduct such tests and evaluations, and resulting in a lack of corresponding noise testing and evaluation methods.

[0028] The following description, with reference to the accompanying drawings, outlines a method, apparatus, vehicle, storage medium, and product for testing and evaluating transmission oil pump noise according to embodiments of this application. Addressing the limitations of transmission oil pump noise testing conditions mentioned in the background section, this application provides a method for testing and evaluating transmission oil pump noise in a complete vehicle configuration. This method significantly reduces external dependence when testing and evaluating transmission oil pump noise, enabling engineers to independently conduct the testing and evaluation. Furthermore, the evaluation results more closely reflect user operating conditions and accurately represent the true noise level of the transmission oil pump in a complete vehicle configuration.

[0029] Specifically, Figure 1 This is a flowchart illustrating a method for testing and evaluating transmission oil pump noise, as provided in an embodiment of this application.

[0030] like Figure 1 As shown, the method for testing and evaluating transmission oil pump noise includes the following steps: In step S101, the transmission of the test vehicle is controlled to be placed in the target mode.

[0031] It is understood that the embodiments of this application control the transmission of the test vehicle to be placed in the target mode in order to accurately lock the stable operating conditions of the transmission oil pump, ensuring that the test process focuses on the operating state of the oil pump, such as specific loads and speed ranges. Without relying on dedicated operating condition control equipment, interference from non-target operating conditions can be eliminated in a whole-vehicle scenario. This provides a unified and reliable test premise for the subsequent accurate acquisition of oil pump speed, noise sound pressure data, and subsequent noise difference analysis and evaluation result output, ensuring the relevance and accuracy of the test and evaluation from the source.

[0032] It should be noted that the target mode refers to the test operation mode that can lock the transmission oil pump into a stable operating condition. Specifically, it can be a fixed gear in manual mode. The purpose is to keep the oil pump in a stable load and speed range through specific gear settings.

[0033] In this embodiment of the application, the target mode can be the target gear in manual mode.

[0034] It is understood that in the manual mode of this application embodiment, the target gear can directly fix the load and speed range of the oil pump, replacing the parameter adjustment function of the special equipment in the bench test in the related technology. Therefore, without the need for complex conditions such as anechoic chambers and special control equipment, other noise interference can be isolated in the whole vehicle scenario and the oil pump noise itself can be focused, thus overcoming the problem of limited test conditions for transmission oil pump noise in the related technology.

[0035] It should be noted that the target gear refers to a preset fixed gear, such as second gear. This gear is maintained throughout the test to lock the oil pump into a stable load and speed range. This eliminates interference from non-target operating conditions, such as gear shifting and gear switching, on the oil pump's operating status, providing a unified and controllable test premise for subsequent data acquisition.

[0036] In step S102, the test vehicle is controlled to run in target mode to obtain the transmission oil pump speed and the noise pressure collected by the sound sensor during the operation of the test vehicle.

[0037] It is understood that the embodiments of this application control the test vehicle to operate in the target mode and simultaneously acquire the transmission oil pump speed and the noise sound pressure collected by the sound sensor, providing an accurate and realistic data source for subsequent noise analysis. The oil pump speed is a key correlation dimension for subsequently associating the main order of noise and stripping away interfering noise, while the noise sound pressure is the basic data reflecting the actual noise situation inside the vehicle. The synchronous acquisition of both does not rely on dedicated parameter control equipment, but directly on the vehicle's own operating state. This ensures the correlation between the data and the actual working state of the oil pump, avoids dependence on complex equipment for related tests, and lays a reliable data foundation for subsequently generating noise difference curves and accurately evaluating oil pump noise.

[0038] In this embodiment of the application, controlling the operation of the test vehicle in the target mode and acquiring the transmission oil pump speed and the noise pressure collected by the sound sensor during the operation of the test vehicle includes: controlling the engine of the test vehicle to run within the target speed range; controlling the engine speed of the test vehicle to increase after detecting that the driver has pressed the accelerator pedal; and acquiring the transmission oil pump speed and the noise pressure collected by the sound sensor during the operation of the test vehicle until the engine is running within the target speed range after detecting that the driver has released the accelerator pedal.

[0039] It is understood that the embodiments of this application first limit the engine speed of the test vehicle to a target range, and then, in conjunction with the driver's operation of pressing and releasing the accelerator pedal, control the engine speed to complete the process of rising and falling back to the target range. The transmission oil pump speed and noise sound pressure data are collected only when the engine returns to the target speed range. By linking the vehicle's own engine speed regulation with throttle operation, the function of the dedicated speed control equipment in the bench test in related technologies is replaced. This ensures that the oil pump is under stable and uniform test conditions during data collection, and does not require reliance on complex dedicated equipment. Combined with the subsequent analysis logic of the noise difference curve, other noise interference can be accurately isolated. Finally, effective testing and evaluation of oil pump noise can be achieved in a vehicle scenario without an anechoic chamber or dedicated control equipment, overcoming the limitations of transmission oil pump noise testing conditions in related technologies.

[0040] It should be noted that the target speed range refers to the lowest stable engine speed range, which is limited to the initial stage of the test and the engine speed range after the driver releases the accelerator pedal and finally drops and stabilizes. The purpose is to ensure that the oil pump is in a stable operating condition during the data acquisition stage and to avoid speed fluctuations interfering with the accuracy of the test data.

[0041] In this embodiment, the sound sensor is located in the driver's inner ear.

[0042] It is understood that the embodiment of this application places the sound sensor in the driver's inner ear, which can directly capture the noise sound pressure in the actual driving scenario, ensuring that the collected noise data is highly consistent with the subjective auditory perception of the human body. By collecting data close to the core area of ​​the driver's hearing, the actual impact of fuel pump noise on the driving experience can be accurately captured without relying on an anechoic chamber to isolate environmental interference and correct data deviations. Combined with subsequent steps such as engine speed control, target gear locking, and noise difference curve analysis, the main order noise of the fuel pump can be accurately isolated in the natural test scenario of the whole vehicle, eliminating the complex environmental control and data correction links, and effectively improving the pertinence of noise testing and the practical value of evaluation results.

[0043] In step S103, a noise difference curve between the total in-vehicle noise and the main order noise of the oil pump is generated based on the transmission oil pump speed and noise sound pressure. The oil pump noise evaluation result of the transmission is generated based on the noise difference curve. The noise difference curve is the corresponding relationship curve between the transmission oil pump speed and the noise difference between the total in-vehicle noise and the main order noise of the oil pump.

[0044] Understandably, this application embodiment can generate a noise difference curve between the total in-vehicle noise and the main order noise of the oil pump, that is, establish a correspondence between the transmission oil pump speed and the difference between the two types of noise, and then generate an oil pump noise evaluation result based on this curve. Through data-level difference calculation, the interference from other noise sources such as the engine and chassis in the vehicle can be accurately isolated. It does not rely on complex environmental control equipment such as anechoic chambers to physically isolate interference, but focuses on the noise contribution of the oil pump itself by means of speed correlation and difference analysis. It makes full use of the accurate data collected in step S102 and avoids the dependence of related tests on special equipment. Finally, the evaluation result can directly reflect the real noise level of the oil pump in the actual operation of the whole vehicle, providing a scientific basis for subsequent objective judgment of oil pump noise performance.

[0045] In this embodiment, generating a noise difference curve between the total in-vehicle noise and the main order noise of the oil pump based on the transmission oil pump speed and noise sound pressure includes: generating a first working curve of multiple main order noise amplitudes of the oil pump based on the transmission oil pump speed and noise sound pressure; using the transmission oil pump speed as the horizontal axis and the envelope curve of the first working curve as the second working curve; obtaining the total in-vehicle noise amplitude of the test vehicle; generating a third working curve of the total in-vehicle noise amplitude using the transmission oil pump speed as the horizontal axis and the total in-vehicle noise amplitude as the vertical axis; and generating a noise difference curve based on the second and third working curves.

[0046] Understandably, this application first generates a first working curve based on the transmission oil pump speed and noise sound pressure to obtain multiple primary-order noise amplitude values ​​of the oil pump. A second working curve is then obtained by taking the envelope to focus on the core noise contribution of the oil pump. Simultaneously, a third working curve is generated with speed as the horizontal axis and total noise amplitude as the vertical axis. Finally, a noise difference curve is generated by calculating the correlation between the second and third working curves. Through the technical logic of multi-curve construction and difference analysis, the interference of other noise sources in the vehicle on the oil pump noise is isolated from the data at the data level, replacing the need for physical noise reduction using an anechoic chamber in related tests. Combined with the locking of operating conditions and precise data acquisition in the whole vehicle scenario, complex environmental control and specialized equipment are not required, simplifying the testing process and significantly improving the accuracy of oil pump noise separation and the reliability of evaluation results.

[0047] It should be noted that the first working curve refers to multiple oil pump main-order noise amplitude curves generated based on transmission oil pump speed and noise sound pressure data. It is limited to covering the main-order noise from the 1st to 5th harmonics of the oil pump, with the horizontal axis uniformly representing the transmission oil pump speed and the vertical axis representing the noise amplitude of the corresponding order. This is the basic curve for extracting the oil pump noise signal. The second working curve refers to the curve obtained by taking the envelope of multiple first working curves. The horizontal axis is still the transmission oil pump speed, and the vertical axis is the enveloped main-order noise amplitude of the oil pump. Its function is to focus on the maximum contribution value of each order of oil pump noise, simplifying the subsequent noise separation logic. The third working curve refers to the curve reflecting the correlation between the total in-vehicle noise amplitude and the oil pump speed. It is limited to the horizontal axis representing the transmission oil pump speed and the vertical axis representing the total in-vehicle noise amplitude, including the engine noise. The superimposed noise from all noise sources, including the engine, chassis, and oil pump, is the key curve for obtaining the overall noise level of the vehicle. The noise difference curve is a curve calculated based on the second and third working curves, with the vertical axis defined as the amplitude of the third working curve minus the amplitude of the second working curve, and the horizontal axis as the transmission oil pump speed. Its function is to isolate non-oil pump noise interference and intuitively reflect the noise contribution of the oil pump itself. The oil pump main order noise amplitude refers to the noise amplitude (corresponding to the 1st to 5th harmonic order) that has a fixed proportional relationship with the transmission oil pump speed. It is a characteristic noise parameter that characterizes the operation of the oil pump itself. The total noise amplitude inside the vehicle specifically refers to the total noise intensity parameter after superimposing all noise sources inside the test vehicle, including the oil pump, engine, chassis, etc., which directly reflects the actual noise level inside the vehicle during operation.

[0048] In this embodiment of the application, generating a transmission oil pump noise evaluation result based on a noise difference curve includes: obtaining a noise evaluation threshold of the noise difference curve; identifying at least one of acceptable oil pump noise and unacceptable noise from the noise difference curve based on the noise evaluation threshold; and generating a transmission oil pump noise evaluation result based on at least one of the acceptable oil pump noise and unacceptable noise.

[0049] It is understood that the embodiments of this application first obtain the noise evaluation threshold corresponding to the noise difference curve, and then accurately identify at least one of acceptable and unacceptable oil pump noise from the noise difference curve based on the threshold, and finally generate the transmission oil pump noise evaluation result accordingly. The quantitative evaluation logic of threshold setting and curve matching replaces the evaluation method that relies on dedicated calibration equipment or subjective experience judgment in related tests, achieving clear classification of oil pump noise without additional complex auxiliary equipment. Combined with precise data acquisition and noise separation technology in the whole vehicle scenario, it simplifies the evaluation process, lowers the operational threshold, and significantly improves the objectivity of the oil pump noise evaluation results.

[0050] It should be noted that the noise evaluation threshold refers to a quantitative judgment standard set based on the noise masking effect, such as 10 dB(A), which is used to distinguish whether the oil pump noise can be masked by the total noise in the vehicle. It is a key reference benchmark for identifying acceptable and unacceptable oil pump noise from the noise difference curve.

[0051] The transmission oil pump noise testing and evaluation method proposed in this application uses the whole vehicle as the core testing carrier. By precisely controlling the transmission to be in the target mode to lock the oil pump test scenario, key data such as transmission oil pump speed and noise sound pressure captured by the sound sensor are collected simultaneously. Then, the difference curve between the total noise in the vehicle and the main order noise of the oil pump is generated with the oil pump speed as the correlation dimension. Finally, it is directly converted into the transmission oil pump noise evaluation result. The complete technical closed loop of locking the target operating mode, collecting core parameter data, analyzing noise difference information, and outputting accurate evaluation conclusions effectively overcomes the problem of limited testing conditions for transmission oil pump noise in related technologies. At the same time, it makes the test results more consistent with the actual working scenario of the oil pump, improving the accuracy and practicality of the evaluation.

[0052] The following will illustrate the process of testing and evaluating transmission oil pump noise in a vehicle state through a specific embodiment, such as... Figure 2 As shown, the specific steps are as follows: In step one, test preparation is conducted. A microphone is placed in the driver's inner ear to ensure that it can accurately capture the noise sound pressure level actually perceived by the driver and passengers, providing a hardware foundation that fits the actual usage scenario for subsequent noise data collection.

[0053] In step two, the operating conditions are set and the test is executed. The test vehicle's transmission is switched to second gear in manual mode, locking the core operating gear of the oil pump. The engine is controlled to run stably at the lowest speed, providing an initial stable operating condition for the test start. The driver depresses the accelerator pedal until the engine speed rises to 3500 rpm. The driver releases the accelerator pedal, waiting for the engine speed to drop and stabilize back at the lowest speed, completing the entire test operation.

[0054] In step three, data is recorded. During the operation under the above conditions, two key data points are recorded simultaneously: the real-time speed of the transmission oil pump and the noise sound pressure data measured by the microphone in the driver's inner ear, ensuring the synchronization and integrity of data acquisition.

[0055] In step four, data processing is performed. Based on the recorded oil pump speed and noise sound pressure, five working curves are calculated and generated, corresponding to the main order noise amplitudes of the transmission oil pump from the 1st to the 5th harmonic frequency. The horizontal axis of the curve represents the oil pump speed, and the vertical axis represents the main order noise amplitude of the oil pump. Simultaneously, one working curve A for the total in-vehicle noise amplitude is calculated and generated, with the horizontal axis representing the oil pump speed and the vertical axis representing the total in-vehicle noise amplitude. Using the oil pump speed as the horizontal axis, the envelope of the five working curves for the main order noise amplitude of the oil pump is taken to obtain curve B. Using "curve A amplitude - curve B amplitude" as the vertical axis and the oil pump speed as the horizontal axis, the noise difference curve C is calculated and generated.

[0056] In step five, the results are evaluated. Based on the evaluation criteria for noise masking effect, the amplitude of curve C is judged: if the amplitude of curve C... This indicates that the overall noise level inside the vehicle effectively masks the oil pump noise, making it difficult for occupants to perceive the oil pump noise, thus classifying the oil pump noise as acceptable. If the amplitude of curve C... This indicates that the oil pump noise is easily perceived by occupants of the vehicle, and is therefore deemed unacceptable. The final output is a clear evaluation conclusion for the transmission oil pump noise: "acceptable" or "unacceptable".

[0057] In summary, the embodiments of this application have at least the following beneficial effects: (1) The testing threshold is low and the evaluation is more realistic: This application conducts transmission oil pump noise testing and evaluation in the whole vehicle state, without relying on the transmission oil pump individual noise test bench, which greatly reduces the threshold of testing and evaluation; at the same time, the test scenario is highly consistent with the actual use conditions of users, which can more realistically reflect the noise level and vibration noise level of the oil pump.

[0058] (2) The evaluation results are more objective: The oil pump noise level evaluation is completed through purely objective test data, without relying on subjective evaluation. This effectively eliminates the bias in evaluation results caused by individual differences among evaluators, and improves the fairness and accuracy of the evaluation results.

[0059] (3) Provide a reliable basis for oil pump selection: It can quantify and sort the noise levels of different models or batches of oil pumps, clearly distinguish the differences in noise performance of each oil pump, and provide a direct and reliable reference for the selection of transmission oil pumps.

[0060] Next, referring to the accompanying drawings, a transmission oil pump noise testing and evaluation device according to an embodiment of this application is described.

[0061] Figure 3 This is a block diagram of a transmission oil pump noise testing and evaluation device according to an embodiment of this application.

[0062] like Figure 3As shown, the transmission oil pump noise testing and evaluation device 30 includes: a control module 301, an acquisition module 302, and a generation module 303.

[0063] The control module 301 is used to control the transmission of the test vehicle to be placed in the target mode; the acquisition module 302 is used to control the operation of the test vehicle in the target mode and acquire the transmission oil pump speed and the noise pressure collected by the sound sensor during the operation of the test vehicle; the generation module 303 is used to generate a noise difference curve between the total noise in the vehicle and the main order noise of the oil pump based on the transmission oil pump speed and the noise pressure, and generate the transmission oil pump noise evaluation result based on the noise difference curve. The noise difference curve is the corresponding relationship curve between the transmission oil pump speed and the noise difference between the total noise in the vehicle and the main order noise of the oil pump.

[0064] In this embodiment of the application, the target mode is the target gear in manual mode.

[0065] In this embodiment of the application, the acquisition module 302 is further used to control the engine of the test vehicle to run within the target speed range; after detecting that the driver has pressed the accelerator pedal, the engine speed of the test vehicle is controlled to increase; after detecting that the driver has released the accelerator pedal, until the engine is running within the target speed range, the transmission oil pump speed and the noise sound pressure collected by the sound sensor are acquired during the operation of the test vehicle.

[0066] In this embodiment, the sound sensor is located in the driver's inner ear.

[0067] In this embodiment, the generation module 303 is further configured to generate a first working curve of multiple primary order noise amplitudes of the oil pump based on the transmission oil pump speed and noise sound pressure; take the transmission oil pump speed as the horizontal axis and the envelope curve of the first working curve as the second working curve; obtain the total in-vehicle noise amplitude of the test vehicle; take the transmission oil pump speed as the horizontal axis and the total in-vehicle noise amplitude as the vertical axis to generate a third working curve of the total in-vehicle noise amplitude; and generate a noise difference curve based on the second working curve and the third working curve.

[0068] In this embodiment, the generation module 303 is further configured to obtain a noise evaluation threshold of the noise difference curve; identify at least one of acceptable oil pump noise and unacceptable noise from the noise difference curve based on the noise evaluation threshold; and generate an oil pump noise evaluation result for the transmission based on at least one of the acceptable oil pump noise and unacceptable noise.

[0069] It should be noted that the foregoing explanation of the embodiment of the transmission oil pump noise testing and evaluation method also applies to the transmission oil pump noise testing and evaluation device of this embodiment, and will not be repeated here.

[0070] The transmission oil pump noise testing and evaluation device proposed in this application uses the whole vehicle as the core testing carrier. By precisely controlling the transmission to be in the target mode to lock the oil pump test scenario, it simultaneously collects key data on transmission oil pump speed and noise sound pressure captured by sound sensors. Then, it generates the difference curve between the total noise in the vehicle and the main order noise of the oil pump, with the oil pump speed as the correlation dimension. Finally, it directly converts the result into the transmission oil pump noise evaluation result. It constructs a complete technical closed loop of locking the target working mode, collecting core parameter data, analyzing noise difference information, and outputting accurate evaluation conclusions. It effectively overcomes the problem of limited testing conditions for transmission oil pump noise in related technologies, and makes the test results more consistent with the actual working scenario of the oil pump, improving the accuracy and practicality of the evaluation.

[0071] This application also provides a vehicle in which the transmission oil pump noise is tested and evaluated using the above-described transmission oil pump noise testing and evaluation method.

[0072] This application also provides a computer-readable storage medium storing a computer program thereon, which, when executed by a processor, implements the above-described method for testing and evaluating transmission oil pump noise.

[0073] This application also provides a computer program, which, when executed, is used to implement the above-described method for testing and evaluating transmission oil pump noise.

[0074] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0075] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "N" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0076] Any process or method described in the flowchart or otherwise herein can be understood as representing a module, segment, or portion of code comprising one or N executable instructions for implementing custom logic functions or processes, and the scope of the preferred embodiments of this application includes additional implementations in which functions may be performed not in the order shown or discussed, including substantially simultaneously or in reverse order depending on the functions involved, as should be understood by those skilled in the art to which embodiments of this application pertain.

[0077] It should be understood that various parts of this application can be implemented using hardware, software, firmware, or a combination thereof. In the above embodiments, steps or methods can be implemented using software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, it can be implemented using any of the following techniques known in the art, or a combination thereof: discrete logic circuits having logic gates for implementing logical functions on data signals, application-specific integrated circuits (ASICs) having suitable combinational logic gates, programmable gate arrays (FPGAs), field-programmable gate arrays (FPGAs), etc.

[0078] Those skilled in the art will understand that all or part of the steps of the methods implementing the above embodiments can be implemented by a program instructing related hardware. The program can be stored in a computer-readable storage medium, and when executed, the program includes one or a combination of the steps of the method embodiments.

[0079] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. A method for testing and evaluating transmission oil pump noise, characterized in that, Includes the following steps: Control the transmission of the test vehicle to be placed in the target mode; The test vehicle is controlled to operate in the target mode, and the transmission oil pump speed and noise pressure collected by the sound sensor are obtained during the operation of the test vehicle. Based on the transmission oil pump speed and the noise sound pressure, a noise difference curve is generated between the total in-vehicle noise and the main order noise of the oil pump. Based on the noise difference curve, an evaluation result of the transmission oil pump noise is generated. The noise difference curve is a curve showing the correspondence between the transmission oil pump speed and the noise difference between the total in-vehicle noise and the main order noise of the oil pump.

2. The method for testing and evaluating transmission oil pump noise according to claim 1, characterized in that, The target mode is the target gear in manual mode.

3. The method for testing and evaluating transmission oil pump noise according to claim 1, characterized in that, Controlling the test vehicle to operate in the target mode, and acquiring the transmission oil pump speed and noise pressure collected by the sound sensor during the operation of the test vehicle, including: Control the engine of the test vehicle to operate within the target speed range; After the driver presses the accelerator pedal, the engine speed of the test vehicle is controlled to increase. After the driver releases the accelerator pedal, until the engine is running within the target speed range, the transmission oil pump speed and the noise pressure collected by the sound sensor are obtained during the operation of the test vehicle.

4. The method for testing and evaluating transmission oil pump noise according to claim 1 or 3, characterized in that, The sound sensor is located in the driver's inner ear.

5. The method for testing and evaluating transmission oil pump noise according to claim 1, characterized in that, The process of generating a noise difference curve between the total in-vehicle noise and the main order noise of the oil pump, based on the transmission oil pump speed and the noise sound pressure, includes: Based on the transmission oil pump speed and the noise sound pressure, a first working curve is generated with multiple oil pump main order noise amplitude values. The envelope curve of the first working curve is taken as the second working curve with the transmission oil pump speed as the horizontal axis. The total noise amplitude inside the test vehicle is obtained, and a third working curve of the total noise amplitude inside the vehicle is generated with the transmission oil pump speed as the horizontal axis and the total noise amplitude inside the vehicle as the vertical axis. The noise difference curve is generated based on the second working curve and the third working curve.

6. The method for testing and evaluating transmission oil pump noise according to claim 1, characterized in that, The step of generating the oil pump noise evaluation result of the transmission based on the noise difference curve includes: Obtain the noise evaluation threshold from the noise difference curve; Based on the noise evaluation threshold, at least one of acceptable oil pump noise and unacceptable noise is identified from the noise difference curve; The oil pump noise evaluation result of the transmission is generated based on at least one of the acceptable and unacceptable oil pump noise.

7. A device for testing and evaluating transmission oil pump noise, characterized in that, include: The control module is used to control the transmission of the test vehicle to be placed in the target mode; The acquisition module is used to control the operation of the test vehicle in the target mode and acquire the transmission oil pump speed and the noise sound pressure collected by the sound sensor during the operation of the test vehicle. The generation module is used to generate a noise difference curve between the total in-vehicle noise and the main order noise of the oil pump based on the transmission oil pump speed and the noise sound pressure, and to generate an evaluation result of the transmission oil pump noise based on the noise difference curve. The noise difference curve is a curve showing the correspondence between the transmission oil pump speed and the noise difference between the total in-vehicle noise and the main order noise of the oil pump.

8. A vehicle, characterized in that, The transmission of the vehicle is tested and evaluated using the transmission oil pump noise test and evaluation method described in any one of claims 1-6.

9. A computer-readable storage medium having a computer program or instructions stored thereon, characterized in that, When the computer program or instructions are executed, they implement the transmission oil pump noise testing and evaluation method according to any one of claims 1-6.

10. A computer program product, comprising a computer program or instructions, characterized in that, When the computer program or instructions are executed, they implement the transmission oil pump noise testing and evaluation method according to any one of claims 1-6.

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