Turbocharger abnormal sound determination method, device, equipment and storage medium

Abstract

The application relates to a supercharger abnormal sound determination method and device, equipment and a storage medium, and relates to the technical field of automobiles. The method comprises the following steps: a supercharger abnormal sound determination device acquires first sound data of a first vehicle under a preset working condition, the first sound data is collected by a noise sensor arranged on the first vehicle, and the distance between the supercharger of the first vehicle and the noise sensor on the first vehicle is less than a preset distance. Further, the supercharger abnormal sound determination device carries out high-pass filtering on the first sound data according to a preset frequency to obtain target sound data after high-pass filtering, and determines the loudness value of the first vehicle according to the target sound data. Further, the supercharger abnormal sound determination device determines that the supercharger of the first vehicle has an abnormal sound when the loudness value of the first vehicle is greater than a preset loudness value. Thus, whether the supercharger of the vehicle has an abnormal sound is determined.

Description

Technical Field

[0001] This application relates to the field of automotive technology, and more particularly to the field of automotive sound quality technology, specifically to a method, apparatus, device, and storage medium for determining abnormal noise from a turbocharger. Background Technology

[0002] Turbochargers increase the intake air volume by compressing air. To avoid the phenomenon of "over-boosting" in turbochargers, exhaust bypass devices are designed on turbochargers, including mechanical exhaust bypass valves and electronically controlled exhaust bypass valves. To improve control efficiency, electronically controlled exhaust bypass valves are often used nowadays.

[0003] The electronically controlled exhaust bypass valve consists of a control chamber, a lever, and an exhaust bypass valve. Due to the clearance between the various components and the need for rapid reciprocating motion, a metallic knocking sound is often produced. The frequency of the sound waves generated by this knocking is generally 1-10 kHz, giving customers the impression of a malfunction and affecting the overall sound quality of the machine. Currently, knocking sounds are generally assessed through subjective evaluation and objective measurement of vibration and noise. However, because the knocking sound generated by the turbocharger occurs inside the turbocharger, and due to the extremely high temperature and small component size inside, directly measuring abnormal noise from the turbocharger is quite difficult. Summary of the Invention

[0004] One of the purposes of this application is to provide a method, apparatus, device, and storage medium for determining whether a turbocharger has abnormal noise.

[0005] To achieve the above objectives, the technical solution adopted in this application is as follows:

[0006] According to a first aspect of this application, a method for determining turbocharger abnormal noise is provided, comprising: a turbocharger abnormal noise determining device acquiring first sound data of a first vehicle under preset operating conditions, wherein the first sound data is collected by a noise sensor deployed on the first vehicle, and the distance between the turbocharger of the first vehicle and the noise sensor on the first vehicle is less than a preset distance; further, the turbocharger abnormal noise determining device performs high-pass filtering on the first sound data according to a preset frequency to obtain target sound data after high-pass filtering; and determines the loudness value of the first vehicle based on the target sound data; further, if the loudness value of the first vehicle is greater than a preset loudness value, the turbocharger abnormal noise determining device determines that there is abnormal noise in the turbocharger of the first vehicle.

[0007] According to the above-mentioned technical means, in the turbocharger abnormal noise determination method provided in this application, the first sound data of turbocharger noise collected when the first vehicle is running under preset operating conditions is obtained. In order to avoid the influence of engine noise, the sound data below the preset frequency is filtered by high-pass filtering to obtain target sound data. Then, the loudness value of the first vehicle is determined based on the target sound data. If the loudness value is greater than the preset loudness value, it indicates that the noise generated by the turbocharger is easily detected by the user, that is, it is determined that there is abnormal noise in the turbocharger of the first vehicle.

[0008] In one possible implementation, the above-mentioned turbocharger noise determination method further includes: the turbocharger noise determination device acquires second sound data of the second vehicle under preset operating conditions, and the turbocharger of the second vehicle does not have any abnormal noise; a preset frequency is determined based on the sound pressure level curves of the first sound data and the second sound data, and when the frequency is lower than the preset frequency, the similarity of the sound pressure level curves of the first sound data and the second sound data is greater than the preset similarity.

[0009] Based on the above technical means, this application provides a method for determining a preset frequency for separating turbocharger noise characteristics, which is used to eliminate the influence of engine noise on the determination of turbocharger abnormal noise.

[0010] In one possible implementation, the above-mentioned turbocharger noise determination method further includes: the turbocharger noise determination device acquiring the operating information of the first vehicle under preset operating conditions, the operating information including engine speed and throttle opening; and determining the target gap based on the gap force condition corresponding to the operating information, the target gap being one of multiple gaps of the turbocharger of the first vehicle.

[0011] Based on the aforementioned technical means, this application can determine the force conditions of the gap corresponding to the vehicle's operating information, thereby identifying the target gap that is prone to knocking sounds, thus realizing the determination of the cause of turbocharger noise and providing support for reducing or eliminating turbocharger noise.

[0012] In one possible implementation, the above-mentioned turbocharger noise determination method further includes: the turbocharger noise determination device determining multiple loudness values ​​of the first vehicle, each of the multiple loudness values ​​corresponding to the valve opening of a target valve, the target valve being the exhaust bypass valve of the turbocharger of the first vehicle; determining the target valve opening, the loudness value corresponding to the target valve opening being less than or equal to a preset loudness value.

[0013] Based on the above technical means, this application can determine the target valve opening degree so that when the vehicle is running under preset operating conditions, the exhaust bypass valve can be controlled to open at the target valve opening degree, thereby reducing the abnormal noise of the turbocharger.

[0014] According to a second aspect of this application, a device for determining abnormal noise from a turbocharger is provided, comprising an acquisition unit, a processing unit, and a determination unit. The acquisition unit is used to acquire first sound data of a first vehicle under preset operating conditions. The first sound data is collected by a noise sensor deployed on the first vehicle, and the distance between the turbocharger of the first vehicle and the noise sensor on the first vehicle is less than a preset distance. The processing unit is used to perform high-pass filtering on the first sound data according to a preset frequency to obtain target sound data after high-pass filtering. The determination unit is used to determine the loudness value of the first vehicle based on the target sound data. The determination unit is further used to determine that abnormal noise exists in the turbocharger of the first vehicle if the loudness value of the first vehicle is greater than a preset loudness value.

[0015] In one possible implementation, the acquisition unit is further configured to acquire second sound data of the second vehicle under preset operating conditions, wherein the turbocharger of the second vehicle does not produce abnormal noise. The determination unit is further configured to determine a preset frequency based on the sound pressure level curves of the first and second sound data, wherein if the frequency is lower than the preset frequency, the similarity between the sound pressure level curves of the first and second sound data is greater than a preset similarity.

[0016] In one possible implementation, the acquisition unit is further configured to acquire operating information of the first vehicle under preset operating conditions, including engine speed and throttle opening. The determination unit is further configured to determine a target clearance based on the clearance force conditions corresponding to the operating information, wherein the target clearance is one of multiple clearances of the turbocharger of the first vehicle.

[0017] In one possible implementation, the determining unit is further configured to determine multiple loudness values ​​of the first vehicle, each loudness value corresponding to the valve opening of a target valve, wherein the target valve is the exhaust bypass valve of the turbocharger of the first vehicle. The determining unit is also configured to determine the target valve opening, wherein the loudness value corresponding to the target valve opening is less than or equal to a preset loudness value.

[0018] According to a third aspect of this application, a turbocharger anomaly determination device is provided, deployed in a vehicle. The turbocharger anomaly determination device includes a memory and a processor, coupled together; the memory stores computer program code, which includes computer instructions; when the processor executes the computer instructions, the turbocharger anomaly determination device performs the turbocharger anomaly determination method provided by the first aspect and any possible implementation thereof.

[0019] According to the fourth aspect provided in this application, a computer-readable storage medium is provided, which stores instructions that, when executed on a turbocharger anomaly determination device, cause the turbocharger anomaly determination device to perform the turbocharger anomaly determination method provided in the first aspect and any possible embodiment thereof.

[0020] According to the fifth aspect provided in this application, a vehicle is provided, including the turbocharger anomaly determination device provided in the third aspect above.

[0021] According to the sixth aspect provided in this application, a computer program product is provided, the computer program product including computer instructions, which, when run on a turbocharger anomaly determination device, cause the turbocharger anomaly determination device to perform the turbocharger anomaly determination method provided in the first aspect and any possible implementation thereof.

[0022] Therefore, the above-mentioned technical features of this application have the following beneficial effects:

[0023] (1) In the turbocharger noise determination method provided in this application, the first sound data of turbocharger noise collected when the first vehicle is running under preset operating conditions is obtained. In order to avoid being affected by engine noise, the sound data below the preset frequency is filtered by high-pass filtering to obtain target sound data. Then, the loudness value of the first vehicle is determined based on the target sound data. If the loudness value is greater than the preset loudness value, it indicates that the noise generated by the turbocharger is easily detected by the user, that is, it is determined that there is abnormal noise in the turbocharger of the first vehicle.

[0024] (2) In the method for determining abnormal noise of the turbocharger provided in this application, when it is determined that there is abnormal noise in the turbocharger, a hardware-level improvement scheme and a software-level improvement scheme are provided to reduce the abnormal noise of the turbocharger.

[0025] It should be noted that the technical effects of any of the implementation methods in aspects two through six can be found in the technical effects of the corresponding implementation methods in aspect one, and will not be repeated here.

[0026] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit this application. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of a turbocharger noise determination system according to an exemplary embodiment;

[0028] Figure 2 This is a flowchart illustrating a method for determining abnormal noise from a turbocharger according to an exemplary embodiment;

[0029] Figure 3 This is a schematic diagram showing a loudness comparison of an abnormal noise from a supercharger, according to an exemplary embodiment.

[0030] Figure 4 This is a flowchart illustrating yet another method for determining turbocharger noise according to an exemplary embodiment;

[0031] Figure 5 This is a schematic diagram of a sound pressure level curve according to an exemplary embodiment;

[0032] Figure 6 This is a schematic diagram of the energy corresponding to sound data according to an exemplary embodiment;

[0033] Figure 7 This is a flowchart illustrating yet another method for determining turbocharger noise according to an exemplary embodiment;

[0034] Figure 8 This is a schematic diagram of an exhaust gas bypass valve structure according to an exemplary embodiment;

[0035] Figure 9 This is a flowchart illustrating yet another method for determining turbocharger noise according to an exemplary embodiment;

[0036] Figure 10 This is a schematic diagram illustrating a valve opening degree-loudness value according to an exemplary embodiment;

[0037] Figure 11 This is a flowchart illustrating yet another method for determining turbocharger noise according to an exemplary embodiment;

[0038] Figure 12 This is a block diagram illustrating a turbocharger noise determination device according to an exemplary embodiment;

[0039] Figure 13 This is a block diagram illustrating a device for determining abnormal noise from a booster according to an exemplary embodiment. Detailed Implementation

[0040] The embodiments of this application will be described below with reference to the accompanying drawings and preferred embodiments. Those skilled in the art can easily understand other advantages and effects of this application from the content disclosed in this specification. This application can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this application. It should be understood that the preferred embodiments are only for illustrating this application and are not intended to limit the scope of protection of this application.

[0041] It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of this application. Therefore, the drawings only show the components related to this application and are not drawn according to the actual number, shape and size of the components in the actual implementation. In the actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0042] In the description of the embodiments, unless otherwise stated, " / " means "or". For example, A / B can mean A or B. The "and / or" in this document is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A alone, A and B simultaneously, and B alone. Furthermore, "at least one" and "more than one" refer to two or more. The terms "first," "second," etc., do not limit the quantity or execution order, and "first," "second," etc., do not necessarily imply that they are different.

[0043] Currently, knocking sounds are generally assessed through subjective evaluation and objective measurement of vibration and noise. However, because knocking sounds generated during turbocharger operation occur inside the turbocharger, and factors such as extremely high temperatures and small component sizes within the turbocharger make direct measurement of turbocharger noises quite difficult. Furthermore, knocking sounds from the exhaust bypass valve often occur under variable operating conditions such as rapid acceleration, making steady-state measurement and analysis challenging. Therefore, a method for identifying turbocharger noises is urgently needed.

[0044] To address the aforementioned problems, this application proposes a method, apparatus, device, and storage medium for determining turbocharger abnormal noise. The turbocharger abnormal noise determination apparatus acquires first sound data of a first vehicle under preset operating conditions. The first sound data is collected by a noise sensor deployed on the first vehicle, and the distance between the turbocharger of the first vehicle and the noise sensor on the first vehicle is less than a preset distance. Further, the turbocharger abnormal noise determination apparatus performs high-pass filtering on the first sound data according to a preset frequency to obtain high-pass filtered target sound data; and determines the loudness value of the first vehicle based on the target sound data. Further, if the loudness value of the first vehicle is greater than a preset loudness value, the turbocharger abnormal noise determination apparatus determines that there is abnormal noise from the turbocharger of the first vehicle.

[0045] In this way, the turbocharger noise determination method provided in this application obtains the first sound data of turbocharger noise collected when the first vehicle is running under preset operating conditions. In order to avoid the influence of engine noise, the sound data below the preset frequency is filtered by high-pass filtering to obtain target sound data. Then, the loudness value of the first vehicle is determined based on the target sound data. If the loudness value is greater than the preset loudness value, it indicates that the noise generated by the turbocharger is easily detected by the user, that is, it is determined that there is abnormal noise in the turbocharger of the first vehicle.

[0046] Figure 1 This application discloses a turbocharger noise determination system. The turbocharger noise determination method provided in this embodiment can be applied to applications such as... Figure 1 The turbocharger noise detection system shown is used to determine whether there is an abnormal noise from the vehicle's turbocharger. Figure 1As shown, the turbocharger noise detection system 10 includes a turbocharger noise detection device 11, a noise sensor 12, and a turbocharger 13.

[0047] The turbocharger noise detection device 11 is connected to the noise sensor 12, and the connection can be wired or wireless. This application embodiment does not limit the connection in this way.

[0048] It should be noted that the aforementioned turbocharger noise detection device 11, noise sensor 12, and turbocharger 13 are all deployed in the same vehicle.

[0049] The distance between the noise sensor 12 and the booster 13 is less than a preset distance.

[0050] For example, the noise sensor 12 can be a microphone for collecting sound data within a preset distance of the booster 13.

[0051] In some embodiments, the turbocharger noise detection device 11 is also connected to the vehicle's electronic control unit, and obtains the vehicle's engine speed, turbocharger speed, exhaust bypass valve opening, and throttle opening through the controller area network (CAN) bus signal sent by the electronic control unit.

[0052] The turbocharger noise detection device 11 can be used to acquire the first sound data of the first vehicle under preset operating conditions.

[0053] The first sound data is collected by the noise sensor 12 deployed on the first vehicle, and the distance between the supercharger 13 of the first vehicle and the noise sensor 12 on the first vehicle is less than a preset distance.

[0054] The turbocharger noise detection device 11 can also be used to perform high-pass filtering on the first sound data according to a preset frequency to obtain the target sound data after high-pass filtering.

[0055] The turbocharger noise detection device 11 can also be used to determine the loudness value of the first vehicle based on the target sound data, and further determine that the turbocharger of the first vehicle has abnormal noise if the loudness value of the first vehicle is greater than the preset loudness value.

[0056] Figure 2 This is a flowchart illustrating a method for determining turbocharger abnormal noise according to some exemplary embodiments. In some embodiments, the above-described method for determining turbocharger abnormal noise can be applied to, for example... Figure 1 The turbocharger noise determination system 10 shown includes a turbocharger noise determination device 11. Hereinafter, this application will describe the turbocharger noise determination method by taking the application of the turbocharger noise determination method to the turbocharger noise determination device 11 as an example.

[0057] like Figure 2 As shown, the turbocharger noise determination method provided in this application includes the following steps S201-S204.

[0058] S201, The turbocharger abnormal noise determination device acquires the first sound data of the first vehicle under preset operating conditions.

[0059] The first sound data is collected by a noise sensor deployed on the first vehicle, and the distance between the turbocharger of the first vehicle and the noise sensor on the first vehicle is less than a preset distance.

[0060] As one possible implementation, when the vehicle is operating under preset conditions, the turbocharger noise detection device acquires the first sound data collected by the noise sensor.

[0061] It should be noted that the preset operating conditions can be set in advance by the maintenance personnel of the turbocharger noise detection system in the turbocharger noise detection device. For example, the preset operating conditions can be the rapid acceleration of the vehicle while stationary and in neutral, with the engine speed rising from idle speed to 2000 revolutions per minute (rpm), or the engine speed dropping from 2000 rpm to idle speed. This application embodiment does not specifically limit this.

[0062] It should be noted that the preset distance can be set in advance by the maintenance personnel of the turbocharger noise detection system in the turbocharger noise detection device. For example, the preset distance can be 10cm, 11cm, etc., and this application embodiment does not specifically limit it.

[0063] In some embodiments, when the first vehicle is running under preset operating conditions, the turbocharger noise determination device acquires the first sound data and also acquires the engine speed, turbocharger speed, exhaust gas bypass valve opening, and throttle opening of the first vehicle through the electronic control unit of the first vehicle. The turbocharger noise determination device can be used to determine whether the first vehicle is running under preset operating conditions based on the acquired engine speed, turbocharger speed, exhaust gas bypass valve opening, and throttle opening.

[0064] S202, The turbocharger abnormal noise determination device performs high-pass filtering on the first sound data according to a preset frequency to obtain the target sound data after high-pass filtering.

[0065] It should be noted that the preset frequency can be set in advance by the maintenance personnel of the turbocharger noise detection system in the turbocharger noise detection device. The basis for setting the preset frequency can be that the difference between the sound pressure level of the engine noise and the first sound data is small between the frequency from 0 and the preset frequency. For example, the preset frequency can be 5kHz (kilohertz).

[0066] As one possible implementation, the turbocharger noise detection device uses the first sound data obtained in step S201 to perform high-pass filtering on the first sound data at a preset frequency to filter out signals with frequencies lower than the preset frequency and obtain target sound data with frequencies higher than the preset frequency.

[0067] Understandably, turbocharger noise mainly originates from the knocking sound caused by the gaps between turbocharger components during operation. Since the knocking sound is a wide-screen noise, while engine noise is mainly low-to-mid frequency noise, in order to separate turbocharger noise, the first sound data collected is high-pass filtered based on a preset frequency to avoid being affected by engine noise when identifying turbocharger noise, thus ensuring the accuracy of identifying turbocharger noise.

[0068] In some embodiments, the preset frequency can also be determined by the turbocharger noise determination device based on the sound data of vehicles without turbocharger noise, as described in the following embodiments of this application.

[0069] S203, the turbocharger noise detection device determines the loudness value of the first vehicle based on the target sound data.

[0070] As one possible implementation, the turbocharger noise detection device uses the Zwicker loudness model based on the ISO 532B international standard to determine the time-varying loudness of the target sound data. Furthermore, based on the determined time-varying loudness, the device calculates the root mean square (RMS) of the loudness and uses the calculated RMS as the loudness value of the first vehicle.

[0071] S204. The turbocharger noise detection device determines that there is an abnormal noise in the turbocharger of the first vehicle when the loudness value of the first vehicle is greater than the preset loudness value.

[0072] As one possible implementation, the turbocharger noise detection device compares the loudness value of the first vehicle determined in step S203 with a preset loudness value. Furthermore, if the loudness value of the first vehicle is greater than the preset loudness value, the turbocharger noise detection device determines that there is abnormal noise from the turbocharger of the first vehicle.

[0073] It should be noted that the preset loudness value can be set in advance by the maintenance personnel of the turbocharger noise determination system in the turbocharger noise determination device to characterize the user's acceptable range for turbocharger noise. For example, the preset loudness value can be set to 20sone (loudness), which characterizes the user's acceptable range as 0-20sone. This application embodiment does not specifically limit this.

[0074] For example, if the preset loudness value is 20 sone, the loudness difference between the sound data showing abnormal noise from the supercharger and the sound data showing no abnormal noise from the supercharger is as follows: Figure 3 As shown, the loudness value of the sound data with abnormal noise from the turbocharger is 21.80 sone, while the loudness value of the sound data without abnormal noise from the turbocharger is 18.91 sone. It is evident that the loudness value of the turbocharger with abnormal noise is 2.89 sone greater than the loudness value of the turbocharger without abnormal noise, and also exceeds the preset loudness value of 20 sone, which exceeds the acceptable range for users regarding turbocharger abnormal noise.

[0075] Understandably, in the turbocharger noise determination method provided in this application embodiment, the first sound data of turbocharger noise collected when the first vehicle is running under preset operating conditions is obtained. In order to avoid being affected by engine noise, the sound data below the preset frequency is filtered by high-pass filtering to obtain target sound data. Then, the loudness value of the first vehicle is determined based on the target sound data. If the loudness value is greater than the preset loudness value, it indicates that the noise generated by the turbocharger is no longer acceptable to the user, that is, it is determined that there is abnormal noise in the turbocharger of the first vehicle.

[0076] In one design, to determine a preset frequency for isolating turbocharger noise characteristics, the turbocharger abnormal noise determination method provided in this application embodiment, such as... Figure 4 As shown, it also includes S301-S302.

[0077] S301, the turbocharger abnormal noise determination device acquires the second sound data of the second vehicle under preset operating conditions.

[0078] The turbocharger in the second vehicle did not produce any abnormal noise.

[0079] As one possible implementation, the turbocharger noise detection device obtains the second sound data of the second vehicle under preset operating conditions from the server.

[0080] Correspondingly, the turbocharger noise detection device deployed on the second vehicle acquires second sound data of the second vehicle under preset operating conditions. This second sound data is collected by a noise sensor deployed on the second vehicle, and the distance between the turbocharger of the second vehicle and the noise sensor on the second vehicle is less than a preset distance. Furthermore, the turbocharger noise detection device deployed on the second vehicle reports the second sound data of the second vehicle under the preset operating conditions to the server.

[0081] In some embodiments, the sound data of the second vehicle can be pre-input into the turbocharger noise determination device by the maintenance personnel of the turbocharger noise determination system. The sound data of the second vehicle refers to the determined engine noise data.

[0082] S302, the turbocharger abnormal noise detection device determines the preset frequency based on the sound pressure level curves of the first sound data and the second sound data.

[0083] Among them, when the frequency is lower than the preset frequency, the similarity of the sound pressure level curves of the first sound data and the second sound data is greater than the preset similarity.

[0084] As one possible implementation, the turbocharger noise detection device determines the sound pressure level curve of the first sound data based on the first sound data, and determines the sound pressure level curve of the second sound data based on the second sound data; wherein, the horizontal parameter of the sound pressure level curve is frequency, and the vertical parameter is sound pressure level. Further, the turbocharger noise detection device determines a frequency range where the similarity between the sound pressure level curves of the first and second sound data is greater than a preset similarity, and sets the upper limit of the frequency range as a preset frequency.

[0085] It should be noted that the similarity of the sound pressure level curves can be determined based on the average of the differences between the two curves. The preset similarity can be set in advance by the maintenance personnel of the turbocharger noise determination system in the turbocharger noise determination device. This application embodiment does not specifically limit this.

[0086] For example, such as Figure 5 As shown, Figure 5 A schematic diagram of the sound pressure level curves of a first sound data and a second sound data is shown. According to the curve similarity confirmation algorithm, it can be determined that the similarity between the sound pressure level curves of the first sound data and the second sound data is less than the preset similarity in the range of 0-5kHz. Furthermore, the booster noise detection device determines 5kHz as the preset frequency.

[0087] In some embodiments, the turbocharger noise detection device determines a preset frequency, which may also involve the turbocharger noise detection device performing a Fourier transform on the time-domain data of the first sound data and the second sound data, such as... Figure 6 The diagram shows the time-frequency-sound energy of the first sound data and the time-frequency-sound energy of the second sound data. Furthermore, based on the time-frequency-sound energy diagrams of the first and second sound data, the booster noise detection device determines that the sound energy intensity difference is small within the 0-5kHz frequency range, and therefore sets the preset frequency to 5kHz.

[0088] It is understandable that in the turbocharger abnormal noise determination method provided in this application embodiment, engine noise is separated by comparing the sound data of the turbocharger with the sound data of the turbocharger without abnormal noise, so as to avoid the engine noise affecting the determination of turbocharger abnormal noise.

[0089] In one design, to determine the cause of turbocharger noise, the turbocharger noise determination method provided in this application embodiment is as follows: Figure 7 As shown, it also includes S401-S402.

[0090] S401, the turbocharger abnormal noise detection device acquires the operating information of the first vehicle under preset operating conditions.

[0091] The operating information includes engine speed and throttle opening.

[0092] As one possible implementation, the turbocharger noise detection device obtains the engine speed and throttle opening of the first vehicle under preset operating conditions through the CAN signal sent by the electronic control unit.

[0093] S402, the turbocharger abnormal noise detection device determines the target clearance based on the clearance stress condition corresponding to the operating information.

[0094] The target gap is one of the multiple gaps in the turbocharger of the first vehicle.

[0095] As one possible implementation, the turbocharger noise detection device determines the force condition of the clearance corresponding to the operating information obtained in step S401. Furthermore, the turbocharger noise detection device compares the force conditions of each clearance and determines the clearance with the highest force as the target clearance.

[0096] For example, Figure 8 A schematic diagram of a waste gas bypass valve is shown, including 51-valve, 52-valve surface, 53-attachment plate, and 54-baffle; ab is the gap between the attachment plate and the valve, and cd is the gap between the baffle and the attachment plate.

[0097] When the operating information meets the conditions for rapid acceleration, the exhaust airflow blows the valve surface, causing the valve's axial clearance cd to be subjected to greater force and stronger disturbance. Since the clearance ab is in the same direction as the exhaust force, the clearance cd is determined to be the target clearance, which easily produces a knocking sound.

[0098] In some embodiments, to eliminate turbocharger noise, the target gap can be reduced, or gaskets can be added between the target gaps to reduce noise caused by collisions between the gaps.

[0099] It is understood that in the turbocharger noise determination method provided in the above embodiments of this application, the gap force condition corresponding to the vehicle's operating information is determined based on the vehicle's operating information, thereby determining the target gap that is prone to knocking sound, thus realizing the determination of the cause of turbocharger noise, and the turbocharger noise can be reduced or eliminated by reducing the target gap and adding gaskets as described above.

[0100] In one design, to ensure that the turbocharger noise does not occur when the first vehicle is running under preset operating conditions, the turbocharger noise determination method provided in this application embodiment is as follows: Figure 9 As shown, it also includes S601-S602.

[0101] S601, the turbocharger noise detection device determines multiple loudness values ​​of the first vehicle.

[0102] Among them, each loudness value in the multiple loudness values ​​corresponds to the valve opening of the target valve, which is the exhaust bypass valve of the turbocharger of the first vehicle.

[0103] As one possible implementation, the turbocharger noise detection device adjusts the valve opening of the target valve and determines multiple noise values ​​of the first vehicle operating under preset conditions at different valve openings.

[0104] For example, taking valve opening degrees of 0%, 10%, 20%...90%, 100% as an example, the resulting loudness values ​​corresponding to different valve opening degrees are as follows: Figure 10 As shown, for example, the loudness value is 16.15 sone when the valve opening is 0%, the loudness value is 26.58 sone when the valve opening is 10%, and the loudness value is 18.26 sone when the valve opening is 100%.

[0105] Understandably, when the valve opening is 0, that is, when the valve is closed, the valve and the valve seat are in contact, and there is a force between the auxiliary plate and the baffle. This is not a clearance fit. In addition, the smaller the valve opening, the greater the loudness value.

[0106] S602, the device for determining abnormal noise from the booster determines the target valve opening.

[0107] Among them, the loudness value corresponding to the target valve opening degree is less than or equal to the preset loudness value.

[0108] As one possible implementation, the turbocharger noise detection device compares the loudness value corresponding to each valve opening degree with a preset loudness value. Furthermore, the device determines the valve opening degree corresponding to a loudness value less than the preset loudness value as the target valve opening degree.

[0109] For example, see attached Figure 10 As shown, when the valve opening is greater than or equal to 70%, the loudness value of the first vehicle is less than the preset loudness value. Therefore, the valve opening of 70% or greater can be determined as the target valve opening.

[0110] Understandably, in the turbocharger noise determination method provided in this application embodiment, by determining the target valve opening, the exhaust bypass valve can be controlled to open at the target valve opening when the vehicle is running under preset operating conditions, so as to reduce or eliminate the abnormal noise present in the turbocharger.

[0111] In one design, the turbocharger noise determination method provided in this application, such as... Figure 11 As shown, it also includes S701-S704.

[0112] S701, the turbocharger abnormal noise detection device acquires sound data under preset operating conditions.

[0113] S702, the turbocharger abnormal noise detection device determines the target clearance.

[0114] S703, the turbocharger noise detection device determines whether the sound data is within an acceptable range.

[0115] It should be noted that the turbocharger noise detection device determines whether the sound data is within an acceptable range based on the loudness value corresponding to the sound data and the preset loudness value. If the sound data is within an acceptable range, it is determined that there is no abnormal noise from the turbocharger; if the sound data is not within an acceptable range, step S704 is executed.

[0116] S704, the turbocharger noise detection device formulates an optimization plan for turbocharger noise.

[0117] It should be noted that the turbocharger noise optimization solution includes hardware and software adjustments. Hardware adjustments include adjusting the target clearance and adding gaskets to the target clearance, while software adjustments include adjusting the valve opening of the waste gas bypass valve.

[0118] The specific implementation of steps S701-S704 can be referred to the above description in the embodiments of this application, and will not be repeated here.

[0119] The above mainly describes the solution provided by the embodiments of this application from a methodological perspective. To achieve the above functions, the turbocharger noise determination device or turbocharger noise determination equipment includes hardware structures and / or software modules corresponding to the execution of each function. Those skilled in the art should readily recognize that, based on the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein, this application can be implemented in hardware or a combination of hardware and computer software. Whether a function is executed in hardware or by computer software driving hardware depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0120] This application embodiment can, based on the above method, exemplarily divide the turbocharger noise detection device or turbocharger noise detection equipment into functional modules. For example, the turbocharger noise detection device or turbocharger noise detection equipment may include various functional modules corresponding to each functional division, or two or more functions may be integrated into one processing module. The integrated module can be implemented in hardware or as a software functional module. It should be noted that the module division in this application embodiment is illustrative and only represents one logical functional division; in actual implementation, there may be other division methods.

[0121] Figure 12 This is a schematic diagram of a turbocharger noise detection device provided in an embodiment of this application. This turbocharger noise detection device is used to perform the aforementioned turbocharger noise detection method. Figure 8 As shown, the turbocharger abnormal noise determination device 80 includes an acquisition unit 801, a processing unit 802, and a determination unit 803.

[0122] The acquisition unit 801 is used to acquire first sound data of the first vehicle under preset operating conditions. The first sound data is collected by a noise sensor deployed on the first vehicle. The distance between the turbocharger of the first vehicle and the noise sensor on the first vehicle is less than a preset distance.

[0123] The processing unit 802 is used to perform high-pass filtering on the first sound data according to a preset frequency to obtain the target sound data after high-pass filtering.

[0124] The determining unit 803 is used to determine the loudness value of the first vehicle based on the target sound data.

[0125] The determining unit 803 is also used to determine that there is abnormal noise in the turbocharger of the first vehicle when the loudness value of the first vehicle is greater than the preset loudness value.

[0126] Optionally, the acquisition unit 801 is further configured to acquire second sound data of the second vehicle under preset operating conditions, wherein the turbocharger of the second vehicle does not produce any abnormal noise.

[0127] The determining unit 803 is also used to determine a preset frequency based on the sound pressure level curves of the first sound data and the second sound data. When the frequency is lower than the preset frequency, the similarity of the sound pressure level curves of the first sound data and the second sound data is greater than the preset similarity.

[0128] Optionally, the acquisition unit 801 is further configured to acquire the operating information of the first vehicle under preset operating conditions, including engine speed and throttle opening.

[0129] The determining unit 803 is also used to determine the target gap based on the gap force condition corresponding to the operating information. The target gap is one of the multiple gaps of the turbocharger of the first vehicle.

[0130] Optionally, the aforementioned determining unit 803 is further configured to determine multiple loudness values ​​of the first vehicle, each of the multiple loudness values ​​corresponding to the valve opening degree of the target valve, the target valve being the exhaust bypass valve of the turbocharger of the first vehicle.

[0131] The determining unit 803 is also used to determine the target valve opening degree, wherein the loudness value corresponding to the target valve opening degree is less than or equal to the preset loudness value.

[0132] Figure 13 This is a block diagram illustrating a device for determining abnormal noise from a supercharger according to an exemplary embodiment. Figure 13 As shown, the turbocharger noise detection device 90 includes, but is not limited to, a processor 901 and a memory 902.

[0133] The aforementioned memory 902 is used to store the executable instructions of the aforementioned processor 901. It is understood that the aforementioned processor 901 is configured to execute instructions to implement the turbocharger abnormal noise determination method in the above embodiment.

[0134] It should be noted that those skilled in the art will understand that Figure 13 The structure of the turbocharger noise detection device shown herein does not constitute a limitation on the turbocharger noise detection device. The turbocharger noise detection device may include, but is not limited to, other types of devices. Figure 13 This may indicate more or fewer components, or combinations of certain components, or different component arrangements.

[0135] The processor 901 is the control center of the turbocharger noise detection device. It connects various parts of the device via various interfaces and lines, and performs various functions and processes data by running or executing software programs and / or modules stored in the memory 902, and by calling data stored in the memory 902, thereby providing overall monitoring of the turbocharger noise detection device. The processor 901 may include one or more processing units. Optionally, the processor 901 may integrate an application processor and a modem processor. The application processor primarily handles the operating system, user interface, and applications, while the modem processor primarily handles wireless communication. It is understood that the modem processor may not be integrated into the processor 901.

[0136] The memory 902 can be used to store software programs and various data. The memory 902 may primarily include a program storage area and a data storage area. The program storage area may store the operating system, application programs required by at least one functional module (such as a determination unit, processing unit, etc.), etc. Furthermore, the memory 902 may include high-speed random access memory, and may also include non-volatile memory, such as at least one disk storage device, flash memory device, or other volatile solid-state storage device.

[0137] In an exemplary embodiment, a computer-readable storage medium including instructions is also provided, such as a memory 902 including instructions, which can be executed by a processor 901 of a turbocharger noise determination device 90 to implement the turbocharger noise determination method in the above embodiments.

[0138] In actual implementation, Figure 12 The functions of the acquisition unit 801, processing unit 802, and determination unit 803 can all be provided by... Figure 13 The processor 901 calls the computer program stored in the memory 902 to implement the process. The specific execution process can be found in the description of the turbocharger noise determination method in the previous embodiment, and will not be repeated here.

[0139] Optionally, the computer-readable storage medium may be a non-transitory computer-readable storage medium, such as a read-only memory (ROM), random access memory (RAM), CD-ROM, magnetic tape, floppy disk, and optical data storage device.

[0140] In an exemplary embodiment, this application also provides a vehicle including the above-described turbocharger noise determination device.

[0141] In an exemplary embodiment, this application also provides a computer program product including one or more instructions, which can be executed by the processor 901 of the turbocharger noise determination device to complete the turbocharger noise determination method in the above embodiments.

[0142] It should be noted that when one or more instructions in the computer-readable storage medium or computer program product are executed by the processor of the turbocharger noise determination device, they implement the various processes of the turbocharger noise determination method embodiment described above, and can achieve the same technical effect as the turbocharger noise determination method described above. To avoid repetition, they will not be described again here.

[0143] Through the above description of the embodiments, those skilled in the art can clearly understand that, for the sake of convenience and brevity, only the division of the above functional modules is used as an example. In actual applications, the above functions can be assigned to different functional modules as needed, that is, the internal structure of the device can be divided into different functional modules to complete all or part of the functions described above.

[0144] In the several embodiments provided in this application, it should be understood that the disclosed apparatus and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of modules or units is only 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 apparatus, or some features may be ignored or not executed. Furthermore, the mutual coupling or direct coupling or communication connection shown or discussed may be through some interfaces; the indirect coupling or communication connection between apparatuses or units may be electrical, mechanical, or other forms.

[0145] The units described as separate components may or may not be physically separate. A component shown as a unit can be one or more physical units; that is, it can be located in one place or distributed in multiple different locations. Some or all of the classified units can be selected to achieve the purpose of this embodiment, depending on actual needs.

[0146] Furthermore, the functional units in the various embodiments of this application 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.

[0147] 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 readable storage medium. Based on this understanding, the technical solution of the embodiments of this application, essentially, or the part that contributes to the prior art, or a complete or partial classification of the technical solution, can be embodied in the form of a software product. This software product is stored in a storage medium and includes several instructions to cause a device (which may be a microcontroller, chip, etc.) or processor to execute all or part of the steps of the methods of the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, ROM, RAM, magnetic disks, or optical disks.

[0148] The above are merely specific embodiments of this application, but the scope of protection of this application is not limited thereto. Any changes or substitutions within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A method for determining abnormal noise in a turbocharger, characterized in that, include: Acquire first sound data of the first vehicle under preset operating conditions, the preset operating conditions including rapid acceleration or rapid deceleration, wherein the rapid acceleration is when the engine speed increases from idle speed to target speed, and the rapid deceleration is when the engine speed decreases from target speed to idle speed. The first sound data was collected by a noise sensor deployed on the first vehicle, and the distance between the supercharger of the first vehicle and the noise sensor on the first vehicle is less than a preset distance. Acquire the second sound data of the second vehicle under the preset operating conditions, and there is no abnormal noise from the turbocharger of the second vehicle; Based on the sound pressure level curves of the first sound data and the second sound data, a preset frequency is determined. When the frequency is lower than the preset frequency, the similarity between the sound pressure level curves of the first sound data and the second sound data is greater than the preset similarity. The first sound data is high-pass filtered according to a preset frequency to obtain the target sound data after high-pass filtering. Based on the target sound data, determine the loudness value of the first vehicle; If the loudness value of the first vehicle is greater than the preset loudness value, it is determined that there is abnormal noise in the turbocharger of the first vehicle.

2. The method for determining turbocharger abnormal noise according to claim 1, characterized in that, The method further includes: The operating information of the first vehicle under the preset operating conditions is obtained, including engine speed and throttle opening. Based on the force conditions of the gap corresponding to the operating information, a target gap is determined, and the target gap is one of the multiple gaps of the turbocharger of the first vehicle.

3. The method for determining turbocharger abnormal noise according to claim 1, characterized in that, The method further includes: Multiple loudness values ​​of the first vehicle are determined, and each of the multiple loudness values ​​corresponds to the valve opening of a target valve, wherein the target valve is the exhaust bypass valve of the turbocharger of the first vehicle. Determine the target valve opening degree, wherein the loudness value corresponding to the target valve opening degree is less than or equal to the preset loudness value.

4. A device for determining abnormal noise from a turbocharger, characterized in that, It includes an acquisition unit, a processing unit, and a determination unit; The acquisition unit is used to acquire first sound data of the first vehicle under preset operating conditions. The preset operating conditions include rapid acceleration or rapid deceleration. The rapid acceleration condition is when the engine speed increases from idle speed to target speed, and the rapid deceleration condition is when the engine speed decreases from target speed to idle speed. The first sound data was collected by a noise sensor deployed on the first vehicle, and the distance between the supercharger of the first vehicle and the noise sensor on the first vehicle is less than a preset distance. The acquisition unit is also used to acquire second sound data of the second vehicle under the preset operating conditions, wherein the turbocharger of the second vehicle does not have any abnormal noise; The processing unit is used to determine a preset frequency based on the sound pressure level curves of the first sound data and the second sound data. When the frequency is lower than the preset frequency, the similarity of the sound pressure level curves of the first sound data and the second sound data is greater than a preset similarity. The processing unit is further configured to perform high-pass filtering on the first sound data according to a preset frequency to obtain high-pass filtered target sound data. The determining unit is used to determine the loudness value of the first vehicle based on the target sound data; The determining unit is further configured to determine that the turbocharger of the first vehicle has abnormal noise when the loudness value of the first vehicle is greater than a preset loudness value.

5. The device for determining abnormal noise from a turbocharger according to claim 4, characterized in that, The acquisition unit is further configured to acquire the operating information of the first vehicle under the preset operating conditions, the operating information including engine speed and throttle opening; The determining unit is further configured to determine a target gap based on the gap stress condition corresponding to the operating information, wherein the target gap is one of multiple gaps of the turbocharger of the first vehicle.

6. The device for determining abnormal noise from a turbocharger according to claim 4, characterized in that, The determining unit is further configured to determine multiple loudness values ​​of the first vehicle, each of the multiple loudness values ​​corresponding to the valve opening degree of a target valve, wherein the target valve is the exhaust bypass valve of the turbocharger of the first vehicle. The determining unit is further configured to determine the target valve opening degree, wherein the loudness value corresponding to the target valve opening degree is less than or equal to the preset loudness value.

7. A device for determining abnormal noise from a turbocharger, characterized in that, Deployed in vehicles, including memory and processor; The memory and the processor are coupled; The memory is used to store computer program code, which includes computer instructions; When the processor executes the computer instructions, the turbocharger noise determination device performs the turbocharger noise determination method as described in any one of claims 1-3.

8. A computer-readable storage medium storing instructions, characterized in that, When the instruction is executed on the turbocharger noise determination device, the turbocharger noise determination device performs the turbocharger noise determination method as described in any one of claims 1-3.

9. A vehicle, characterized in that, Includes the turbocharger noise detection device as described in claim 7.

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