CN116907631A - Supercharger abnormal sound determining method, device, equipment and storage medium - Google Patents

Abstract

The application relates to a supercharger abnormal sound determining method, device, equipment and storage medium, and relates to the technical field of automobiles. The method comprises the following steps: the method comprises the steps that a supercharger abnormal sound determining device obtains first sound data of a first vehicle under a preset working condition, wherein the first sound data are 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 smaller than a preset distance. Further, the supercharger abnormal sound determining device carries out high-pass filtering on the first sound data according to the preset frequency to obtain target sound data after high-pass filtering; and determining a loudness value of the first vehicle based on the target sound data. Further, the supercharger abnormal sound determining device determines that abnormal sound exists in the supercharger of the first vehicle under the condition that the loudness value of the first vehicle is larger than a preset loudness value. Thereby, it is realized to determine whether or not there is abnormal sound in the supercharger of the vehicle.

Description

Supercharger abnormal sound determining method, device, equipment and storage medium

Technical Field

The application relates to the technical field of automobiles, in particular to the technical field of automobile sound quality, and specifically relates to a method, a device, equipment and a storage medium for determining abnormal sound of a supercharger.

Background

The turbocharger increases the air inflow through compressed air, in order to avoid the phenomenon that the turbocharger generates over-pressurization, a waste gas bypass device is designed on the turbocharger, and the waste gas bypass device comprises a mechanical waste gas bypass valve and an electric control waste gas bypass valve.

The electric control exhaust bypass valve consists of a control air chamber, a pull rod, an exhaust bypass valve and the like, and because of the fit clearance among all parts, the electric control exhaust bypass valve needs to perform quick reciprocating motion, metal knocking sound is often generated, the frequency of sound waves generated by knocking is generally 1-10 KHz, the customer is given a fault feeling, and the sound quality of the whole machine is influenced. At present, the knocking sound is mainly vibration and noise which are evaluated subjectively and measured objectively, but the knocking sound generated by the operation of the supercharger is generated in the supercharger, and factors such as extremely high temperature, smaller size of parts and the like exist in the supercharger, so that the difficulty of directly measuring abnormal sound of the supercharger is high.

Disclosure of Invention

The application aims to provide a supercharger abnormal sound determining method, device, equipment and storage medium, which are used for determining whether abnormal sound exists in a supercharger of a vehicle.

In order to achieve the above purpose, the technical scheme adopted by the application is as follows:

according to a first aspect of the present application, there is provided a method for determining abnormal sound of a supercharger, including the step of obtaining, by a supercharger abnormal sound determining device, first sound data of a first vehicle under a preset working condition, the first sound data being collected by a noise sensor disposed on the first vehicle, and a distance between the supercharger of the first vehicle and the noise sensor on the first vehicle being smaller than a preset distance. Further, the supercharger abnormal sound determining device carries out high-pass filtering on the first sound data according to the preset frequency to obtain target sound data after high-pass filtering; and determining a loudness value of the first vehicle based on the target sound data. Further, the supercharger abnormal sound determining device determines that abnormal sound exists in the supercharger of the first vehicle under the condition that the loudness value of the first vehicle is larger than a preset loudness value.

According to the method for determining abnormal sound of the supercharger provided by the application, the first sound data of the supercharger noise collected by the first vehicle under the condition of running under the preset working condition is obtained, the sound data lower than the preset frequency is further filtered in a high-pass filtering mode to obtain the target sound data in order to avoid being influenced by the engine noise, and further the loudness value of the first vehicle is determined according to the target sound data, and under the condition that the loudness value is larger than the preset loudness value, the condition that the noise generated by the supercharger is easily perceived by a user is indicated, namely, the abnormal sound of the supercharger of the first vehicle is determined.

In one possible implementation manner, the method for determining abnormal sound of the supercharger further includes: the method comprises the steps that a supercharger abnormal sound determining device obtains second sound data of a second vehicle under a preset working condition, and the supercharger of the second vehicle does not have abnormal sound; and determining a preset frequency according to the sound pressure level curves of the first sound data and the second sound data, wherein the similarity of the sound pressure level curves of the first sound data and the second sound data is larger than the preset similarity under the condition that the frequency is lower than the preset frequency.

According to the technical means, the application provides an implementation mode for determining the preset frequency for separating the noise characteristics of the supercharger, which is used for eliminating the influence of engine noise on the abnormal noise determination of the supercharger.

In one possible implementation manner, the method for determining abnormal sound of the supercharger further includes: the method comprises the steps that a supercharger abnormal sound determining device obtains operation information of a first vehicle under a preset working condition, wherein the operation information comprises the rotation speed of an engine and the opening degree of an accelerator; and determining a target clearance according to the clearance stress condition corresponding to the operation information, wherein the target clearance is one of a plurality of clearances of the supercharger of the first vehicle.

According to the technical means, the gap stress condition corresponding to the running information can be determined based on the running information of the vehicle, so that the target gap which is easy to generate the knocking sound is determined, the reason for causing abnormal sound of the supercharger is determined, and support is provided for reducing or eliminating the abnormal sound of the supercharger.

In one possible implementation manner, the method for determining abnormal sound of the supercharger further includes: the method comprises the steps that a supercharger abnormal sound determining device determines a plurality of loudness values of a first vehicle, each loudness value in the plurality of loudness values corresponds to the valve opening of a target valve, and the target valve is a waste gate valve of a supercharger of the first vehicle; and determining the opening of the target valve, wherein the loudness value corresponding to the opening of the target valve is smaller than or equal to the preset loudness value.

According to the technical means, the target valve opening is determined, so that the waste gate valve is controlled to be opened according to the target valve opening under the condition that the vehicle runs to the preset working condition, and abnormal sound existing in the supercharger is reduced.

According to a second aspect of the present application, there is provided a supercharger abnormal sound determination apparatus, including an acquisition unit, a processing unit, and a determination unit. The acquisition unit is used for acquiring first sound data of the first vehicle under a preset working condition, wherein the first sound data are acquired by the 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 smaller than the preset distance. And the processing unit is used for carrying out high-pass filtering on the first sound data according to the preset frequency to obtain target sound data after high-pass filtering. And the determining unit is used for determining the loudness value of the first vehicle according to the target sound data. And the determining unit is also used for determining that abnormal sound exists in the supercharger of the first vehicle under the condition that the loudness value of the first vehicle is larger than the preset loudness value.

In one possible embodiment, the acquiring unit is further configured to acquire second sound data of the second vehicle under a preset working condition, where the supercharger of the second vehicle does not have abnormal sound. The determining unit is further configured to determine a preset frequency according to the sound pressure level curves of the first sound data and the second sound data, where the similarity of the sound pressure level curves of the first sound data and the second sound data is greater than the preset similarity when the frequency is lower than the preset frequency.

In one possible implementation manner, the acquiring unit is further configured to acquire operation information of the first vehicle under a preset working condition, where the operation information includes an engine speed and an accelerator opening. The determining unit is further used for determining a target gap according to the gap stress condition corresponding to the operation information, wherein the target gap is one of a plurality of gaps of the supercharger of the first vehicle.

In one possible embodiment, the determining unit is further configured to determine a plurality of loudness values of the first vehicle, where each loudness value of the plurality of loudness values corresponds to a valve opening of a target valve, and the target valve is a wastegate valve of a supercharger of the first vehicle. The determining unit is further used for determining the opening of the target valve, and the loudness value corresponding to the opening of the target valve is smaller than or equal to the preset loudness value.

According to a third aspect of the present application, there is provided a supercharger abnormality determining apparatus disposed in a vehicle. The supercharger anomaly determination device includes a memory and a processor, the memory and the processor being coupled; the memory is for storing computer program code, the computer program code comprising computer instructions; the supercharger anomaly determination device performs the supercharger anomaly determination method provided in the first aspect and any possible implementation thereof, when the processor executes computer instructions.

According to a fourth aspect of the present application, there is provided a computer-readable storage medium having instructions stored therein that, when run on a supercharger anomaly determination device, cause the supercharger anomaly determination device to perform the supercharger anomaly determination method provided by the first aspect and any possible implementation thereof.

According to a fifth aspect of the present application, there is provided a vehicle including the supercharger abnormality determining apparatus provided in the third aspect described above.

According to a sixth aspect of the present application, there is provided a computer program product comprising computer instructions which, when run on a supercharger anomaly determination device, cause the supercharger anomaly determination device to perform the supercharger anomaly determination method provided by the first aspect and any possible implementation thereof.

Therefore, the technical characteristics of the application have the following beneficial effects:

(1) According to the method for determining the abnormal sound of the supercharger, the first sound data of the supercharger noise collected by the first vehicle under the condition that the first vehicle runs under the preset working condition is obtained, the sound data lower than the preset frequency is filtered in a high-pass filtering mode to obtain target sound data in order to avoid the influence of engine noise, the loudness value of the first vehicle is determined according to the target sound data, and under the condition that the loudness value is larger than the preset loudness value, the fact that the noise generated by the supercharger is easily perceived by a user is indicated, namely the abnormal sound of the supercharger of the first vehicle is determined.

(2) In the method for determining abnormal sound of the supercharger, under the condition that abnormal sound exists in the supercharger, the method provides an improvement scheme on a hardware level and an improvement scheme on a software level so as to reduce the abnormal sound of the supercharger.

It should be noted that, the technical effects caused by any implementation manner of the second aspect to the sixth aspect may refer to the technical effects caused by the corresponding implementation manner in the first aspect, which is not described herein.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application as claimed.

Drawings

FIG. 1 is a schematic diagram illustrating a configuration of a supercharger abnormal sound determination system, according to an example embodiment;

FIG. 2 is a flowchart illustrating a method of determining abnormal sound of a supercharger, according to an exemplary embodiment;

FIG. 3 is a loudness comparison diagram of a supercharger abnormal sound, according to an example embodiment;

FIG. 4 is a flowchart illustrating yet another supercharger abnormal-sound determination method, according to an example embodiment;

FIG. 5 is a schematic diagram of a sound pressure level graph, according to an exemplary embodiment;

FIG. 6 is a schematic energy diagram corresponding to sound data, according to an exemplary embodiment;

FIG. 7 is a flowchart illustrating yet another method of supercharger abnormal noise determination, according to an example embodiment;

FIG. 8 is a schematic diagram of a wastegate valve structure according to an exemplary embodiment;

FIG. 9 is a flowchart illustrating yet another supercharger abnormal-sound determination method, according to an example embodiment;

FIG. 10 is a schematic diagram of valve opening-loudness values shown according to an exemplary embodiment;

FIG. 11 is a flowchart illustrating yet another supercharger abnormal-sound determination method, according to an example embodiment;

FIG. 12 is a block diagram illustrating a supercharger abnormal sound determination device, according to an example embodiment;

Fig. 13 is a block diagram of a supercharger abnormal sound determining apparatus, according to an example embodiment.

Detailed Description

Further advantages and effects of the present application will become readily apparent to those skilled in the art from the disclosure herein, by referring to the accompanying drawings and the preferred embodiments. The application may be practiced or carried out in other embodiments that depart from the specific details, and the details of the present description may be modified or varied from the spirit and scope of the present application. It should be understood that the preferred embodiments are presented by way of illustration only and not by way of limitation.

It should be noted that the illustrations provided in the following embodiments merely illustrate the basic concept of the present application by way of illustration, and only the components related to the present application are shown in the drawings and are not drawn according to the number, shape and size of the components in actual implementation, and the form, number and proportion of the components in actual implementation may be arbitrarily changed, and the layout of the components may be more complicated.

In the description of the embodiments, unless otherwise indicated, "/" means "or" and, for example, a/B may mean a or B. "and/or" herein is merely an association relationship describing an association object, and means that three relationships may exist, for example, a and/or B may mean: a exists alone, A and B exist together, and B exists alone. Further, "at least one", "a plurality" means two or more. The terms "first," "second," and the like do not limit the number and order of execution, and the terms "first," "second," and the like do not necessarily differ.

At present, the knocking sound is mainly vibration and noise which are evaluated subjectively and measured objectively, but the knocking sound generated by the operation of the supercharger is generated in the supercharger, and factors such as extremely high temperature, smaller size of parts and the like exist in the supercharger, so that the difficulty of directly measuring abnormal sound of the supercharger is high. Moreover, knocking of the waste gate valve often occurs under variable working conditions such as rapid acceleration, and steady-state measurement and analysis are not performed well, so that a method for determining abnormal sound of the supercharger is urgently needed.

In order to solve the problems, the application provides a method, a device, equipment and a storage medium for determining abnormal sound of a supercharger, wherein the abnormal sound of the supercharger is determined by the device for determining abnormal sound of the supercharger, the first sound data of a first vehicle under a preset working condition are acquired 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 smaller than the preset distance. Further, the supercharger abnormal sound determining device carries out high-pass filtering on the first sound data according to the preset frequency to obtain target sound data after high-pass filtering; and determining a loudness value of the first vehicle based on the target sound data. Further, the supercharger abnormal sound determining device determines that abnormal sound exists in the supercharger of the first vehicle under the condition that the loudness value of the first vehicle is larger than a preset loudness value.

In this way, in the method for determining abnormal sound of the supercharger provided by the application, the first sound data of the supercharger noise collected by the first vehicle under the condition of running under the preset working condition is obtained, the sound data lower than the preset frequency is further filtered in a high-pass filtering mode to obtain target sound data in order to avoid being influenced by the engine noise, and then the loudness value of the first vehicle is determined according to the target sound data, and under the condition that the loudness value is larger than the preset loudness value, the condition that the noise generated by the supercharger is easily perceived by a user is indicated, namely, the abnormal sound of the supercharger of the first vehicle is determined.

Fig. 1 shows a supercharger abnormal sound determining system, and the method for determining abnormal sound of a supercharger provided by the embodiment of the application can be applied to the supercharger abnormal sound determining system shown in fig. 1, and is used for determining whether abnormal sound exists in a supercharger of a vehicle. As shown in fig. 1, the supercharger abnormal sound determination system 10 includes a supercharger abnormal sound determination device 11, a noise sensor 12, and a supercharger 13.

The supercharger abnormal sound determining device 11 is connected with the noise sensor 12, and may be connected in a wired manner or may be connected in a wireless manner, which is not limited in the embodiment of the present application.

The above-described supercharger abnormal sound determination device 11, the noise sensor 12, and the supercharger 13 are all disposed on the same vehicle.

Wherein the distance between the noise sensor 12 and the supercharger 13 is smaller than a preset distance.

Illustratively, the noise sensor 12 may be a microphone for collecting sound data within a preset distance of the supercharger 13.

In some embodiments, the supercharger abnormal sound determining device 11 is further connected to an electronic control unit of the vehicle, and obtains the engine speed, the supercharger speed, the valve opening of the waste gate valve, the accelerator opening and the like of the vehicle through a controller area network bus (controller area network, CAN) signal sent by the electronic control unit.

The supercharger abnormal sound determining device 11 may be configured to obtain first sound data of the first vehicle under a preset working condition.

Wherein the first sound data is collected by the noise sensor 12 disposed on the first vehicle, and a distance between the supercharger 13 of the first vehicle and the noise sensor 12 on the first vehicle is smaller than a preset distance.

The supercharger abnormal sound determining device 11 may be further configured to perform high-pass filtering on the first sound data according to a preset frequency, so as to obtain target sound data after performing high-pass filtering.

The supercharger abnormal sound determining device 11 may be further configured to determine, according to the target sound data, a loudness value of the first vehicle, and further determine that the supercharger of the first vehicle has abnormal sound if the loudness value of the first vehicle is greater than a preset loudness value.

FIG. 2 is a flow chart diagram illustrating a method of determining abnormal sound of a supercharger according to some example embodiments. In some embodiments, the above-described supercharger abnormal sound determination method may be applied to the supercharger abnormal sound determination device 11 in the supercharger abnormal sound determination system 10 shown in fig. 1. In the following, the embodiment of the present application will be described by taking the application of the supercharger abnormal sound determination method to the supercharger abnormal sound determination device 11 as an example.

As shown in fig. 2, the method for determining abnormal noise of a supercharger provided by the embodiment of the present application includes the following steps S201 to S204.

S201, the supercharger abnormal sound determining device obtains first sound data of the first vehicle under a preset working condition.

The first sound data are acquired by a noise sensor arranged on the first vehicle, and the distance between a supercharger of the first vehicle and the noise sensor on the first vehicle is smaller than a preset distance.

As a possible implementation manner, the supercharger abnormal sound determining device obtains the first sound data collected by the noise sensor when the vehicle runs under the preset working condition.

It should be noted that, the preset working condition may be set in advance in the supercharger abnormal sound determining device by an operator of the supercharger abnormal sound determining system, and by way of example, the preset working condition may be that the vehicle is in-situ and the gear is suddenly accelerated in neutral, the engine speed reaches 2000 revolutions per minute (revolutions per minute, rpm) from the idle speed, or the engine speed is reduced from 2000rpm to the idle speed, which is not particularly limited in the embodiment of the present application.

It should be noted that the preset distance may be preset in the abnormal sound determining device of the supercharger by an operation and maintenance person of the abnormal sound determining system of the supercharger, and exemplary, the preset distance may be 10cm (centimeter), 11cm, etc., which is not particularly limited in the embodiment of the present application.

In some embodiments, when the first vehicle is running under the preset working condition, the supercharger abnormal sound determining device obtains the first sound data, and meanwhile, obtains the engine speed, the supercharger speed, the valve opening of the waste gate valve, the accelerator opening and the like of the first vehicle through the electronic control unit of the first vehicle, and the supercharger abnormal sound determining device may be used for determining whether the first vehicle is running under the preset working condition according to the obtained engine speed, the supercharger speed, the valve opening of the waste gate valve and the accelerator opening.

S202, the supercharger abnormal sound determining device carries out high-pass filtering on the first sound data according to preset frequency to obtain target sound data after high-pass filtering.

It should be noted that, the preset frequency may be set in advance in the supercharger abnormal sound determining device by an operator of the supercharger abnormal sound determining system, and the setting basis of the preset frequency may be that the difference between the sound pressure level of the engine noise and the sound pressure level of the first sound data is small between the frequency and the preset frequency, and the preset frequency may be 5kHz (kilohertz) as an example.

As a possible implementation manner, the supercharger abnormal sound determining device performs high-pass filtering on the first sound data through the preset frequency based on the first sound data acquired in the step S201, so as to filter out the signal smaller than the preset frequency, and obtain the target sound data higher than the preset frequency.

It can be understood that the abnormal sound of the supercharger mainly originates from the knocking sound of the gap between the supercharger components in the running process, because the knocking sound is the noise of a wide screen, and the noise of the engine mainly is the noise of a medium frequency and a low frequency, in order to separate the abnormal sound of the supercharger, the collected first sound data is subjected to high-pass filtering based on the preset frequency, so that the influence of the noise of the engine when the abnormal sound of the supercharger is determined is avoided, and the accuracy of determining the abnormal sound of the supercharger is ensured.

In some embodiments, the preset frequency may also be determined by the supercharger abnormal sound determining device according to sound data of the vehicle without the supercharger abnormal sound, and the description of the subsequent embodiments of the present application may be referred to specifically.

S203, the supercharger abnormal sound determining device determines the loudness value of the first vehicle according to the target sound data.

As one possible implementation, the supercharger abnormal sound determining device determines the time-varying loudness of the target sound data based on a Zwicker loudness model of the ISO532B international standard. Further, the supercharger abnormal sound determining device calculates a Root Mean Square (RMS) of the time-varying loudness according to the determined time-varying loudness, and determines the calculated root mean square as the loudness value of the first vehicle.

S204, determining that abnormal sound exists in the supercharger of the first vehicle under the condition that the loudness value of the first vehicle is larger than a preset loudness value by the supercharger abnormal sound determining device.

As a possible implementation manner, the supercharger abnormal sound determining device compares the loudness value of the first vehicle determined in the above step S203 with a preset loudness value. Further, the supercharger abnormal sound determining device determines that abnormal sound exists in the supercharger of the first vehicle under the condition that the loudness value of the first vehicle is larger than a preset loudness value.

It should be noted that, the preset loudness value may be set in advance by an operator of the supercharger abnormal sound determining system in the supercharger abnormal sound determining device, so as to represent an acceptable range of the supercharger abnormal sound by the user, for example, the preset loudness value may be set to 20sone (loudness), and represent an acceptable range of the user to be 0-20sone, which is not particularly limited in the embodiment of the present application.

For example, if the preset loudness value is 20 tone, the loudness difference of the sound data with abnormal sound and the sound data without abnormal sound of the supercharger is shown in fig. 3, where the loudness value of the sound data with abnormal sound of the supercharger is 21.80 tone, and the loudness value of the sound data without abnormal sound of the supercharger is 18.91 tone. It can be seen that the loudness value of the abnormal noise of the supercharger is 2.89 sones greater than the loudness value of the abnormal noise of the supercharger, and is greater than the preset loudness value of 20 sones, and the loudness value of the abnormal noise of the supercharger exceeds the acceptable range of the abnormal noise of the supercharger for users.

It can be appreciated that in the method for determining abnormal sound of a supercharger provided in the embodiment of the present application, first sound data of collected noise of the supercharger is obtained when the first vehicle runs under a preset working condition, and further in order to avoid being affected by noise of the engine, sound data lower than a preset frequency is filtered by a high-pass filtering mode to obtain target sound data, and further, a loudness value of the first vehicle is determined according to the target sound data, and when the loudness value is greater than the preset loudness value, it is indicated that noise generated by the supercharger is not accepted by a user, that is, abnormal sound exists in the supercharger of the first vehicle.

In one design, in order to determine the preset frequency for separating the noise characteristics of the supercharger, the method for determining abnormal noise of the supercharger provided by the embodiment of the application, as shown in fig. 4, further includes S301-S302.

S301, the supercharger abnormal sound determining device obtains second sound data of the second vehicle under a preset working condition.

Wherein, the supercharger of the second vehicle has no abnormal sound.

As one possible implementation manner, the supercharger abnormal sound determining device obtains second sound data of the second vehicle under a preset working condition from the server.

Correspondingly, the supercharger abnormal sound determining device deployed on the second vehicle obtains second sound data of the second vehicle under a preset working condition, wherein the second sound data is acquired by a noise sensor deployed on the second vehicle, and the distance between the supercharger of the second vehicle and the noise sensor on the second vehicle is smaller than the preset distance. Further, the supercharger abnormal sound determining device deployed on the second vehicle reports second sound data of the second vehicle under the preset working condition to the server.

In some embodiments, the sound data of the second vehicle may be input in advance to the supercharger abnormal sound determination device by an operation and maintenance person of the supercharger abnormal sound determination system. Wherein the sound data of the second vehicle is the determined engine noise data.

S302, the supercharger abnormal sound determining device determines preset frequency according to the sound pressure level curves of the first sound data and the second sound data.

And under the condition that 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 larger than the preset similarity.

As one possible implementation manner, the supercharger abnormal sound determining device determines a sound pressure level curve of first sound data according to the first sound data, and determines a sound pressure level curve of second sound data according to the second sound data; wherein, the transverse parameter of the sound pressure level curve is frequency, and the longitudinal parameter is sound pressure level. Further, the supercharger abnormal sound determining device determines a frequency interval in which the similarity of the sound pressure level curves of the first sound data and the second sound data is greater than a preset similarity, and determines an upper limit value of the frequency interval as a preset frequency.

It should be noted that, the similarity of the sound pressure level curves may be determined according to an average value of differences between the two curves, and the preset similarity may be set in advance in the supercharger abnormal sound determining device by an operation and maintenance person of the supercharger abnormal sound determining system.

As an example, as shown in fig. 5, fig. 5 shows a schematic diagram of a sound pressure level curve of first sound data and a sound pressure level curve of second sound data, according to a curve similarity confirmation algorithm, it may be determined that a similarity between the sound pressure level curve of the first sound data and the sound pressure level curve of the second sound data is smaller than a preset similarity, and further, the supercharger abnormal sound determining device determines that 5kHz is a preset frequency.

In some embodiments, the supercharger abnormal sound determining device determines the preset frequency, and may further be: the supercharger abnormal sound determining device performs fourier transform on the time domain data of the first sound data and the second sound data, as shown in fig. 6, to obtain a schematic diagram of time domain-frequency-sound energy of the first sound data and a schematic diagram of time domain-frequency-sound energy of the second sound data. Further, the supercharger abnormal sound determining device determines that the difference of sound energy intensity is small in the range of 0-5kHz according to the schematic diagram of time domain-frequency-sound energy of the first sound data in the second sound data, so that the preset frequency is determined to be 5kHz.

It can be appreciated that in the method for determining abnormal sound of a supercharger provided by the embodiment of the application, by comparing the sound data of abnormal sound of the supercharger with the sound data of abnormal sound of the supercharger, the engine noise is separated, and the influence of the engine noise on the determination of abnormal sound of the supercharger is avoided.

In one design, in order to determine the cause of abnormal noise of the supercharger, the method for determining abnormal noise of the supercharger provided by the embodiment of the application, as shown in fig. 7, further includes S401-S402.

S401, the supercharger abnormal sound determining device obtains operation information of the first vehicle under a preset working condition.

The operation information comprises the engine speed and the accelerator opening.

As one possible implementation manner, the supercharger abnormal sound determining device obtains the engine speed and the accelerator opening of the first vehicle under the preset working condition through the CAN signal sent by the electronic control unit.

S402, the supercharger abnormal sound determining device determines a target clearance according to the clearance stress condition corresponding to the operation information.

Wherein the target clearance is one of a plurality of clearances of a supercharger of the first vehicle.

As a possible implementation manner, the supercharger abnormal sound determining device determines the gap stress situation corresponding to the operation information according to the operation information obtained in the step S401. Further, the abnormal sound determining device of the supercharger compares the stress conditions of the gaps, and determines the gap with the largest stress as a target gap.

By way of example, FIG. 8 shows a schematic diagram of a wastegate valve comprising 51-valve, 52-valve surface, 53-take-up plate, 54-baffle; a-b are the gaps between the take-off plate and the valve, and c-d are the gaps between the baffle and the take-off plate.

Under the condition that the operation information meets the rapid acceleration condition, the gap c-d in the axial direction of the valve is larger in stress and stronger in disturbance due to the fact that the exhaust air flow blows the surface of the valve, and the gap a-b is consistent with the direction of the exhaust acting force, the gap c-d is determined to be a target gap, and the knocking sound is easy to generate.

In some embodiments, to eliminate supercharger abnormal sound, the target gaps may be reduced, or washers may be added between the target gaps to reduce abnormal sound from collisions between the gaps.

It can be understood that in the method for determining abnormal noise of a supercharger provided in the above embodiment of the present application, based on the running information of the vehicle, the gap stress condition corresponding to the running information is determined, so as to determine the target gap where the knocking noise is likely to occur, thereby determining the cause of abnormal noise of the supercharger, and reducing or eliminating abnormal noise of the supercharger by reducing the target gap and increasing the gasket.

In one design, in order to prevent abnormal noise of the supercharger from occurring when the first vehicle runs under the preset working condition, the method for determining abnormal noise of the supercharger provided by the embodiment of the application is shown in fig. 9, and further includes S601-S602.

S601, the supercharger abnormal sound determining device determines a plurality of loudness values of the first vehicle.

Each loudness value in the plurality of loudness values corresponds to a valve opening of a target valve, wherein the target valve is a waste gate valve of a supercharger of the first vehicle;

as one possible implementation manner, the supercharger abnormal sound determining device adjusts the valve opening of the target valve, and determines a plurality of loudness values of the first vehicle running under the preset working condition under different valve openings.

For example, taking valve opening as 0, 10%, 20% … …%, and 100% as examples, the obtained loudness values corresponding to different valve openings are as shown in fig. 10, for example, the loudness value is 16.15 tone when the valve opening is 0, the loudness value is 26.58 tone when the valve opening is 10%, and the loudness value is 18.26 tone when the valve opening is 100%.

It can be appreciated that in the case where the valve opening is 0, that is, when the valve is closed, the valve is attached to the valve seat, the take-up plate contacts with the baffle, there is an acting force, and the acting force does not belong to clearance fit, in addition, the smaller the valve opening is, the larger the loudness value is.

S602, determining the opening degree of the target valve by the supercharger abnormal sound determining device.

And the loudness value corresponding to the opening of the target valve is smaller than or equal to a preset loudness value.

As a possible implementation manner, the supercharger abnormal sound determining device compares the loudness value corresponding to each valve opening with a preset loudness value. Further, the supercharger abnormal sound determining device determines the valve opening corresponding to the loudness value smaller than the preset loudness value as the target valve opening.

For example, as shown in fig. 10, in the case where the valve opening is greater than or equal to 70%, the loudness value of the first vehicle is smaller than the preset loudness value, whereby it is possible to determine that the valve opening of which the valve opening is greater than or equal to 70% is the target valve opening.

It can be appreciated that in the method for determining abnormal noise of a supercharger provided by the embodiment of the application, by determining the opening of the target valve, the waste gate valve can be controlled to be opened according to the opening of the target valve under the condition that the vehicle runs to a preset working condition, so that abnormal noise existing in the supercharger is reduced and eliminated.

In one design, the method for determining abnormal noise of a supercharger provided by the application, as shown in fig. 11, further comprises S701-S704.

S701, acquiring sound data under a preset working condition by the supercharger abnormal sound determining device.

S702, the supercharger abnormal sound determining device determines a target gap.

S703, the supercharger abnormal sound determining device determines whether the sound data is in an acceptable range.

It should be noted that, the determining whether the sound data is in the acceptable range by the supercharger abnormal sound determining device may be determined according to the loudness value corresponding to the sound data and the preset loudness value. Under the condition that the sound data is in an acceptable range, determining that abnormal sound does not exist in the supercharger; in the case where the sound data is not in the acceptable range, step S704 is performed.

S704, the supercharger abnormal sound determining device makes a supercharger abnormal sound optimizing scheme.

The abnormal sound optimizing scheme of the supercharger comprises hardware adjustment and software adjustment, wherein the hardware adjustment comprises adjustment of a target clearance and addition of a gasket at the target clearance, and the software adjustment comprises adjustment of the valve opening of the waste gate valve.

The specific implementation manner of the steps S701 to S704 may refer to the above description of the embodiments of the present application, and will not be repeated here.

The foregoing description of the solution provided by the embodiments of the present application has been mainly presented in terms of a method. In order to achieve the above functions, the supercharger abnormal sound determining device or the supercharger abnormal sound determining apparatus includes a hardware structure and/or a software module for executing the respective functions. Those of skill in the art will readily appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as hardware or combinations of hardware and computer software. Whether a function is implemented as hardware or computer software driven hardware depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.

According to the method, the supercharger abnormal sound determining device or the supercharger abnormal sound determining equipment can be divided into the functional modules, for example, the supercharger abnormal sound determining device or the supercharger abnormal sound determining equipment can comprise each functional module corresponding to each functional division, and two or more functions can be integrated into one processing module. The integrated modules may be implemented in hardware or in software functional modules. It should be noted that, in the embodiment of the present application, the division of the modules is schematic, which is merely a logic function division, and other division manners may be implemented in actual implementation.

Fig. 12 is a schematic structural diagram of a device for determining abnormal noise of a supercharger according to an embodiment of the present application. The supercharger abnormal sound determining device is used for executing the supercharger abnormal sound determining method. As shown in fig. 8, the supercharger abnormal sound determining apparatus 80 includes an acquisition unit 801, a processing unit 802, and a determining unit 803.

The acquiring unit 801 is configured to acquire first sound data of a first vehicle under a preset working condition, where the first sound data is acquired by a noise sensor disposed on the first vehicle, and a distance between a supercharger of the first vehicle and the noise sensor on the first vehicle is smaller than a preset distance.

The processing unit 802 is configured to perform high-pass filtering on the first sound data according to a preset frequency, so as to obtain target sound data after performing high-pass filtering.

A determining unit 803 for determining a loudness value of the first vehicle based on the target sound data.

The determining unit 803 is further configured to determine that the supercharger of the first vehicle has abnormal noise if the loudness value of the first vehicle is greater than the preset loudness value.

Optionally, the acquiring unit 801 is further configured to acquire second sound data of the second vehicle under a preset working condition, where the supercharger of the second vehicle does not have abnormal sound.

The determining unit 803 is further configured to determine a preset frequency according to the sound pressure level curves of the first sound data and the second sound data, where the similarity of the sound pressure level curves of the first sound data and the second sound data is greater than the preset similarity when the frequency is lower than the preset frequency.

Optionally, the acquiring unit 801 is further configured to acquire operation information of the first vehicle under a preset working condition, where the operation information includes an engine speed and an accelerator opening.

The determining unit 803 is further configured to determine a target gap according to a gap stress condition corresponding to the operation information, where the target gap is one of a plurality of gaps of the supercharger of the first vehicle.

Optionally, the determining unit 803 is further configured to determine a plurality of loudness values of the first vehicle, where each loudness value of the plurality of loudness values corresponds to a valve opening of a target valve, and the target valve is a wastegate valve of a supercharger of the first vehicle.

The determining unit 803 is further configured to determine a target valve opening, where a loudness value corresponding to the target valve opening is less than or equal to a preset loudness value.

Fig. 13 is a block diagram of a supercharger abnormal sound determining apparatus, according to an example embodiment. As shown in fig. 13, the supercharger abnormal sound determining apparatus 90 includes, but is not limited to: a processor 901 and a memory 902.

The memory 902 is configured to store executable instructions of the processor 901. It will be appreciated that the processor 901 is configured to execute instructions to implement the supercharger abnormal sound determination method in the above embodiment.

It should be noted that, as those skilled in the art will understand, the structure of the supercharger abnormal sound determining apparatus shown in fig. 13 does not constitute a limitation of the supercharger abnormal sound determining apparatus, and the supercharger abnormal sound determining apparatus may include more or less components than those shown in fig. 13, or may combine some components, or may have a different arrangement of components.

The processor 901 is a control center of the supercharger abnormal sound determining apparatus, connects respective parts of the entire supercharger abnormal sound determining apparatus using various interfaces and lines, and performs various functions and processes data of the supercharger abnormal sound determining apparatus by running or executing software programs and/or modules stored in the memory 902 and calling data stored in the memory 902, thereby performing overall monitoring of the supercharger abnormal sound determining apparatus. The processor 901 may include one or more processing units. Alternatively, the processor 901 may integrate an application processor that primarily handles operating systems, user interfaces, applications, etc., with a modem processor that primarily handles wireless communications. It will be appreciated that the modem processor described above may not be integrated into the processor 901.

The memory 902 may be used to store software programs as well as various data. The memory 902 may mainly include a storage program area and a storage data area, wherein the storage program area may store an operating system, application programs (such as a determination unit, a processing unit, etc.) required for at least one functional module, and the like. In addition, the memory 902 may include high-speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other volatile solid-state storage device.

In an exemplary embodiment, a computer readable storage medium is also provided, such as a memory 902, comprising instructions executable by the processor 901 of the supercharger abnormal-sound determining device 90 to implement the supercharger abnormal-sound determining method in the above-described embodiments.

In actual implementation, the functions of the acquisition unit 801, the processing unit 802, and the determination unit 803 in fig. 12 may be implemented by the processor 901 in fig. 13 calling a computer program stored in the memory 902. For specific implementation, reference may be made to the description of the supercharger abnormal sound determination method in the above embodiment, and details are not repeated here.

Alternatively, the computer readable storage medium may be a non-transitory computer readable storage medium, for example, a Read-Only Memory (ROM), a random access Memory (Random Access Memory, RAM), a CD-ROM, a magnetic tape, a floppy disk, an optical data storage device, and the like.

In an exemplary embodiment, the embodiment of the application further provides a vehicle comprising the supercharger abnormal sound determining device.

In an exemplary embodiment, the present application also provides a computer program product comprising one or more instructions executable by the processor 901 of the supercharger abnormal-sound determination device to perform the supercharger abnormal-sound determination method of the above-described embodiment.

It should be noted that, when the instructions in the computer readable storage medium or one or more instructions in the computer program product are executed by the processor of the supercharger abnormal sound determining apparatus, the processes of the supercharger abnormal sound determining method embodiment are implemented, and the technical effects same as those of the supercharger abnormal sound determining method can be achieved, so that repetition is avoided, and no further description is provided herein.

From the foregoing description of the embodiments, it will be apparent to those skilled in the art that, for convenience and brevity of description, only the above-described division of functional modules is illustrated, and in practical application, the above-described functional allocation may be performed by different functional modules according to needs, i.e. the internal structure of the apparatus is divided into different functional modules, so as to perform all the classification parts or part of the functions described above.

In the several embodiments provided by the present application, it should be understood that the disclosed apparatus and method may be implemented in other manners. For example, the apparatus embodiments described above are merely illustrative, e.g., the division of modules or units is merely a logical function division, and there may be additional divisions when actually implemented, e.g., multiple units or components may be combined or integrated into another apparatus, or some features may be omitted or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be an indirect coupling or communication connection via some interfaces, devices or units, which may be in electrical, mechanical or other form.

The units described as separate parts may or may not be physically separate, and the parts shown as units may be one physical unit or a plurality of physical units, may be located in one place, or may be distributed in a plurality of different places. The purpose of the embodiment scheme can be achieved by selecting part or all of the classification part units according to actual needs.

In addition, each functional unit in the embodiments of the present application may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit. The integrated units may be implemented in hardware or in software functional units.

The integrated units, if implemented in the form of software functional units and sold or used as stand-alone products, may be stored in a readable storage medium. Based on such understanding, the technical solution of the embodiments of the present application, or the portion contributing to the prior art or the whole classification portion or portion of the technical solution, may be embodied in the form of a software product stored in a storage medium, where the software product includes several instructions to cause a device (may be a single-chip microcomputer, a chip or the like) or a processor (processor) to execute the whole classification portion or part of the steps of the method of the embodiments of the present application. And the aforementioned storage medium includes: a usb disk, a removable hard disk, a ROM, a RAM, a magnetic disk, or an optical disk, etc.

The present application is not limited to the above embodiments, and any changes or substitutions within the technical scope of the present application should be covered by the scope of the present application. Therefore, the protection scope of the application is subject to the protection scope of the claims.

Claims (11)

1. A supercharger abnormal sound determination method, characterized by comprising:

acquiring first sound data of a first vehicle under a preset working condition, wherein the first sound data are acquired by a noise sensor arranged on the first vehicle, and the distance between a supercharger of the first vehicle and the noise sensor on the first vehicle is smaller than a preset distance;

performing high-pass filtering on the first sound data according to a preset frequency to obtain target sound data after high-pass filtering;

determining a loudness value of the first vehicle according to the target sound data;

and under the condition that the loudness value of the first vehicle is larger than a preset loudness value, determining that abnormal sound exists in the supercharger of the first vehicle.

2. The supercharger abnormal sound determination method of claim 1, further comprising:

acquiring second sound data of a second vehicle under the preset working condition, wherein the supercharger of the second vehicle does not have abnormal sound;

And determining the preset frequency according to the sound pressure level curves of the first sound data and the second sound data, wherein the similarity of the sound pressure level curves of the first sound data and the second sound data is larger than the preset similarity under the condition that the frequency is lower than the preset frequency.

3. The supercharger abnormal sound determination method according to claim 1 or 2, further comprising:

acquiring operation information of the first vehicle under the preset working condition, wherein the operation information comprises the engine speed and the accelerator opening;

and determining a target clearance according to the clearance stress condition corresponding to the operation information, wherein the target clearance is one of a plurality of clearances of the supercharger of the first vehicle.

4. The supercharger abnormal sound determination method according to claim 1 or 2, further comprising:

determining a plurality of loudness values of the first vehicle, each loudness value of the plurality of loudness values corresponding to a valve opening of a target valve, the target valve being a wastegate valve of a supercharger of the first vehicle;

and determining the opening of the target valve, wherein the loudness value corresponding to the opening of the target valve is smaller than or equal to the preset loudness value.

5. The device for determining abnormal sound of the supercharger is characterized by comprising an acquisition unit, a processing unit and a determination unit;

the acquisition unit is used for acquiring first sound data of a first vehicle under a preset working condition, wherein the first sound data are acquired by a noise sensor arranged on the first vehicle, and the distance between a supercharger of the first vehicle and the noise sensor on the first vehicle is smaller than a preset distance;

the processing unit is used for carrying out high-pass filtering on the first sound data according to preset frequency to obtain target sound data after high-pass filtering;

the determining unit is used for determining a loudness value of the first vehicle according to the target sound data;

the determining unit is further configured to determine that abnormal sound exists in the supercharger of the first vehicle when the loudness value of the first vehicle is greater than a preset loudness value.

6. The supercharger abnormal sound determination device of claim 5, wherein the acquisition unit is further configured to acquire second sound data of a second vehicle under the preset working condition, wherein the supercharger of the second vehicle is free from abnormal sound;

the determining unit is further configured to determine the preset frequency according to the sound pressure level curves of the first sound data and the second sound data, where the similarity of the sound pressure level curves of the first sound data and the second sound data is greater than a preset similarity when the frequency is lower than the preset frequency.

7. The supercharger abnormal sound determination device according to claim 5 or 6, wherein the acquisition unit is further configured to acquire operation information of the first vehicle under the preset working condition, the operation information including an engine speed and an accelerator opening;

the determining unit is further configured to determine a target gap according to a gap stress condition corresponding to the operation information, where the target gap is one of a plurality of gaps of the supercharger of the first vehicle.

8. The supercharger abnormal-sound determination device according to claim 5 or 6, wherein the determination unit is further configured to determine a plurality of loudness values of the first vehicle, each loudness value of the plurality of loudness values corresponding to a valve opening of a target valve, the target valve being a wastegate valve of a supercharger of the first vehicle;

the determining unit is further configured to determine a target valve opening, where a loudness value corresponding to the target valve opening is less than or equal to the preset loudness value.

9. The supercharger abnormal sound determining device is characterized by being deployed on a vehicle and comprising a memory and a processor;

the memory is coupled to the processor;

The memory is used for storing computer program codes, and the computer program codes comprise computer instructions;

the supercharger abnormal sound determination device performs the supercharger abnormal sound determination method according to any one of claims 1 to 4 when the processor executes the computer instructions.

10. A computer-readable storage medium having instructions stored therein that, when executed on a supercharger abnormal-sound determination device, cause the supercharger abnormal-sound determination device to perform the supercharger abnormal-sound determination method of any one of claims 1-4.

11. A vehicle comprising the supercharger abnormal sound determining apparatus according to claim 9.