Abnormal Sound Diagnosis System

Abstract

To determine whether abnormal sound generated in a vehicle should be reduced with abnormal sound reduction control executed in the vehicle, with accuracy.SOLUTION: An abnormal sound diagnosis system includes: a terminal which acquires data of sound generated from a vehicle and inquiry information about abnormal sound generated in the vehicle; and an information processing device which diagnoses the abnormal sound generated in the vehicle on the basis of the data of the sound and the inquiry information from the terminal. The terminal causes a display unit to display a change mode of a control signal of abnormal sound reduction control and a change mode of the data of the sound acquired in synchronization with output of the control signal in a case where it is diagnosed that the abnormal sound generated in the vehicle should be reduced with the abnormal sound reduction control executed in the vehicle by the information processing device.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present disclosure relates to a abnormal noise diagnosis system for diagnosing abnormal noises generated in a vehicle.

Background Art

[0002] Conventionally, a hybrid vehicle including a transmission having a gear train to which an engine, a first rotating electric machine, and a second rotating electric machine are connected is known (see, for example, Patent Document 1). The control device of this hybrid vehicle determines whether or not the abnormal noise generation condition of the gear train is satisfied, and controls the first rotating electric machine to apply a pressing torque to the gear train when the residence time, which is the period during which the abnormal noise generation condition is continuously satisfied, exceeds a predetermined value. Further, the control device prevents a pressing torque from being applied to the gear train when the abnormal noise generation condition is not satisfied and when the residence time is within the predetermined value. Thereby, in a hybrid vehicle, it is possible to suppress the occurrence of an abnormal noise in the gear train that gives the user a sense of discomfort, and to suppress the movement of the crank angle that may cause a shock at the time of engine start.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] Here, when an abnormal noise that should be reduced by abnormal noise reduction control (application of pressing torque) actually executed in a vehicle, such as the above-described gear rattle, occurs, since various sounds are generated in the vehicle, it is not easy to determine whether the actually recognized abnormal noise is one that should be originally reduced by the abnormal noise reduction control based on auditory sense, vehicle state at the time of occurrence timing of the abnormal noise, or the like.

[0005] Therefore, the main object of the present disclosure is to enable accurate determination of whether abnormal noise generated in a vehicle should be reduced by abnormal noise reduction control executed in the vehicle.

Means for Solving the Problems

[0006] The abnormal noise diagnosis system of the present disclosure includes a terminal that acquires data of sounds emitted from a vehicle and inquiry information regarding abnormal noise generated in the vehicle, and an information processing device that diagnoses the abnormal noise generated in the vehicle based on the sound data and the inquiry information from the terminal. The terminal can cause a display unit to display a change pattern of a control signal of the abnormal noise reduction control and a change pattern of sound data acquired in synchronization with the output of the control signal when it is diagnosed by the information processing device that the abnormal noise generated in the vehicle should be reduced by the abnormal noise reduction control executed in the vehicle.

[0007] In the abnormal noise diagnosis system of the present disclosure, when it is diagnosed by the information processing device that abnormal noise generated in a vehicle should be reduced by abnormal noise reduction control executed in the vehicle, the terminal causes the display unit to display a change pattern of a control signal of the abnormal noise reduction control and a change pattern of sound data acquired in synchronization with the output of the control signal. Thereby, the user of the abnormal noise diagnosis system can accurately determine whether the abnormal noise generated in the vehicle should be reduced by the abnormal noise reduction control from the change of the sound data with respect to the change of the control signal displayed on the display unit.

[0008] Further, the vehicle may include an electric motor, and the abnormal noise reduction control may output torque for suppressing the generation of the abnormal noise to the electric motor.

[0009] Furthermore, the vehicle may include an engine and a power transmission mechanism having a plurality of gears and connected to the engine and the electric motor, the abnormal noise may be a meshing noise generated by the power transmission mechanism, and the abnormal noise reduction control may intermittently output a pressing torque for eliminating the backlash between the gears to the electric motor.

[0010] In such an aspect, by checking the change in the sound data when the pressing torque is not output from the electric motor on the display unit, it becomes possible to accurately determine whether the abnormal noise generated in the vehicle should be reduced by the abnormal noise reduction control executed in the vehicle.

[0011] Further, the terminal may be a portable terminal including the display unit, a sound acquisition unit that acquires the sound data, and an inquiry information acquisition unit that acquires the inquiry information, and that exchanges information with the information processing device through communication.

[0012] This makes it possible to easily acquire the sound data, reduce the load on the portable terminal, and obtain a more accurate diagnosis result from the diagnostic device.

[0013] Furthermore, the information processing device may include a diagnostic unit constructed by machine learning so as to diagnose the cause of the abnormal noise based on the provided information.

Brief Description of the Drawings

[0014]

Figure 1

Figure 2

Figure 3

Embodiments for Carrying Out the Invention

[0015] Next, with reference to the drawings, a mode for carrying out the invention of the present disclosure will be described.

[0016] FIG. 1 is a schematic configuration diagram showing a abnormal noise diagnosis system 1 of the present disclosure. The abnormal noise diagnosis system 1 shown in the figure is for diagnosing the cause of abnormal noise generated in a vehicle V equipped with only an engine as a power generation source, an electric vehicle (BEV, FCEV), or a hybrid vehicle (HEV, PHEV) as shown in FIG. 1. The vehicle V includes an engine (internal combustion engine) EG, motor generators MG1 and MG2, a planetary gear PG for power distribution, a counter drive gear Ga, a counter driven gear Gb, and a power transmission mechanism TM including a final drive gear (drive pinion gear) Gc.

[0017] The planetary gear PG of the vehicle V is a differential rotation mechanism including a sun gear Ps, a ring gear Pr, and a planetary carrier Pc that rotatably supports a plurality of pinion gears Pp. As shown in FIG. 1, the sun gear Ps is connected to the rotor of the motor generator MG1, and the planetary carrier Pc is connected to the crankshaft of the engine EG via a damper mechanism DD. Further, the ring gear Pr rotates coaxially and integrally with the counter drive gear Ga (output member) of the power transmission mechanism TM. Furthermore, the final drive gear Gc of the power transmission mechanism TM meshes with the differential ring gear Dr of the differential gear DF and is connected to the left and right wheels (drive wheels) via the differential gear DF and the drive shaft DS.

[0018] In such a vehicle V, when the engine EG is idling (self-sustaining operation) so as not to substantially output torque, there is a possibility that the gear teeth on the input side in the power transmission mechanism TM hit the gear teeth on the output side due to the rotational fluctuation of the engine EG, generating a tooth meshing sound. Therefore, in the vehicle V, when the engine EG is idling, as abnormal noise reduction control, pressing control is executed to intermittently output a pressing torque for eliminating the backlash between the meshing gears of the power transmission mechanism TM to the motor generator MG1.

[0019] As shown in FIG. 1, the abnormal noise diagnosis system 1 includes a mobile terminal 10 and a server 20 as an information processing apparatus capable of exchanging information with the mobile terminal 10 through communication. The mobile terminal 10 is used by an operator (user of the abnormal noise diagnosis system 1) such as a vehicle dealership or a repair shop when responding to a user (owner) such as a vehicle V where an abnormal noise has occurred, or when performing a reproduction test to reproduce the abnormal noise by driving (operating) the vehicle V or the like on a road or a test bench. In the present embodiment, the mobile terminal 10 is a smartphone including a SoC, a ROM, a RAM, an auxiliary storage device (flash memory) M, a touch panel type display unit 11, a communication module 12 capable of exchanging various information with an electronic control unit (ECU) not shown such as the server 20 and the vehicle V through wired or wireless communication, and a microphone not shown. Further, an abnormal noise diagnosis support application (program) is installed in the mobile terminal 10. Then, as shown in FIG. 1, the mobile terminal 10 includes an inquiry information acquisition unit 13, a sound acquisition unit 14, a vehicle state acquisition unit 15, an arithmetic processing unit 16, an extraction unit 17, and a display control unit 18, which are constructed by the cooperation of an abnormal noise diagnosis support application (software) and hardware such as the SoC of the mobile terminal 10.

[0020] The inquiry information acquisition unit 13 acquires information indicating the state of the vehicle V etc. when abnormal noise occurs, provided by a user such as the vehicle V etc. via the display unit 11 (hereinafter referred to as "inquiry information"). The inquiry information includes vehicle identification information such as vehicle type, vehicle identification number (chassis number), etc., order matters, date and time of occurrence, occurrence frequency, location where the abnormal noise occurs, type of sound (onomatopoeia), physical quantities that change during the running of the vehicle V etc. such as vehicle speed, driving state of the vehicle V etc., warm-up influence in an engine-mounted vehicle, selection items selected by the driver during the driving of the vehicle V etc., driving environment information of the vehicle V etc., and is input by the above-mentioned operator or user such as the vehicle V etc. The sound acquisition unit 14 acquires time-axis data of sound (sound pressure) when a reproduction test is executed by the operator. The vehicle state acquisition unit 15 acquires information indicating the state of the vehicle V etc. (hereinafter referred to as "vehicle state data") in synchronization with the acquisition of the time-axis data of the sound by the sound acquisition unit 14 when the reproduction test is executed. The vehicle state data includes a plurality of physical quantities (such as vehicle speed, engine speed, etc.) corresponding to the items of the inquiry information. The arithmetic processing unit 16 executes analysis processing of the time-axis data of the sound acquired by the sound acquisition unit 14. The extraction unit 17 executes narrowing down etc. of the analysis result by the arithmetic processing unit 16 according to the selection of the operator etc. The display control unit 18 controls the display unit 11.

[0021] The server 20 as an abnormal noise diagnosis device is a computer (information processing device) including a CPU, ROM, RAM, input / output device, communication module, etc., and is installed and managed by, for example, an automobile manufacturer that manufactures the above-mentioned vehicle V etc. In the server 20, an abnormal noise diagnosis unit 21 for diagnosing abnormal noise generated in the vehicle V etc. is constructed by the cooperation of hardware such as a CPU and a pre-installed abnormal noise diagnosis application. The abnormal noise diagnosis unit 21 includes a neural network (convolutional neural network) constructed by supervised learning (machine learning) so as to diagnose the cause of the abnormal noise generated in the vehicle V etc. and the parts that became the source of the abnormal noise based on the inquiry information, time-axis data of sound, etc. acquired by the mobile terminal 10. Also, in the server 20, when it is found that a new abnormal noise has occurred in the vehicle V etc., re-learning of the abnormal noise diagnosis unit 21 is executed using the time-axis data of the sound acquired for the new abnormal noise and the contents of each item of the above-mentioned inquiry information as teacher data.

[0022] Furthermore, the server 20 includes a storage device 22 that stores a noise database storing information about a plurality of different noises that have been found to occur in the vehicle for each vehicle type. The noise database associates and stores, for each of the plurality of different noises, information such as the time-axis data of the sound, the cause of the different noise, the component that is the source of the noise, the content of the inquiry information provided by the user, etc., and the countermeasures for eliminating the different noise. In addition, the server 20 updates the noise database based on information obtained from a large number of vehicles including the vehicle V, information (reports) about newly discovered different noises transmitted from automobile manufacturers (developers, etc.), vehicle dealerships, repair shops, etc. As a technology for constructing the different noise diagnosis unit 21, for example, those described in the following papers (1)-(5) or a combination thereof can be used. (1)Unsupervised Filterbank Learning Using Convolutional Restricted Boltzmann Machine for Environmental Sound Classification (2)LEARNING FROM BETWEEN-CLASS EXAMPLES FOR DEEP SOUND RECOGNITION (3)Novel Phase Encoded Mel Filterbank Energies for Environmental Sound Classification (4)Knowledge Transfer from Weakly Labeled Audio using Convolutional Neural Network for Sound Events and Scenes (5)Novel TEO-based Gammatone Features for Environmental Sound Classification

[0023] Next, with reference to FIGS. 2 and 3, the diagnostic procedure for abnormal noises generated in the vehicle V by the abnormal noise diagnosis system 1 will be described.

[0024] When an operator at a vehicle dealership, repair shop, etc. is requested by a user of the vehicle V or the like to eliminate an abnormal noise, after listening to the inquiry information from the user or the like, the operator executes a reproduction test to obtain information necessary for diagnosing the abnormal noise. When executing the reproduction test, the operator connects the mobile terminal 10 to the electronic control unit of the vehicle V, and places or fixes the mobile terminal 10 or an external microphone connected to the mobile terminal 10 at an appropriate position on the vehicle V. Further, the operator activates the abnormal noise diagnosis support application and turns on the start switch of the vehicle V. Accordingly, the mobile terminal 10 acquires information such as the vehicle identification number or chassis number of the vehicle V from the electronic control unit. Furthermore, the operator taps the recording start button displayed on the display unit 11, drives (operates) the vehicle V on a road or a test bench, and reproduces the driving state in which the abnormal noise has occurred based on the inquiry information from the user of the vehicle V or the like.

[0025] While the vehicle V is driving (operating), the sound acquisition unit 14 of the mobile terminal 10 acquires the time-axis data of the sound emitted from the vehicle V at predetermined intervals (microscopic intervals) and stores it in the auxiliary storage device M. The vehicle state acquisition unit 15 acquires the vehicle state data specified by the operator according to the inquiry information from the user of the vehicle V or the like from the electronic control unit of the vehicle V at predetermined intervals (microscopic intervals) in synchronization with the acquisition of the time-axis data of the sound by the sound acquisition unit 14 and stores it in the auxiliary storage device M. When the operator taps the recording stop button displayed on the display unit 11, the acquisition of the time-axis data of the sound and the vehicle state data is completed.

[0026] After the reproduction test is completed, the arithmetic processing unit 16 performs STFT (Short-Time Fourier Transform) on the time-axis data of the sound to obtain a spectrogram (acoustic spectrogram) showing the relationship between time, frequency, and sound pressure. The display control unit 18 causes the display unit 11 to display the spectrogram. In the present embodiment, the spectrogram is a color map showing the relationship between time and sound pressure level for each frequency by using the horizontal axis as the time axis, the vertical axis as the frequency axis, and color-coding the sound pressure level. Further, the operator selects (designates) a range (hereinafter referred to as the "diagnosis range") to be diagnosed (analyzed) by the abnormal sound diagnosis unit 21 (server 20) in the spectrogram on the display unit 11. Furthermore, the operator inputs inquiry information into the input screen displayed on the display unit 11. Then, when the operator taps the information transmission button displayed on the display unit 11, information necessary for diagnosing the abnormal sound is transmitted from the communication module 12 of the mobile terminal 10 to the server 20. In the present embodiment, the information transmitted from the mobile terminal 10 to the server 20 includes the time-axis data of the sound acquired by the sound acquisition unit 14, the vehicle state data acquired by the vehicle state acquisition unit 15, the inquiry information, and information defining the diagnosis range selected by the operator.

[0027] FIG. 2 is a flowchart showing a series of processes executed by the abnormal sound diagnosis unit 21 of the server 20 in response to the reception of information from the mobile terminal 10.

[0028] As shown in FIG. 2, the abnormal sound diagnosis unit 21 of the server 20 acquires the time-axis data of the sound, the vehicle state data, the inquiry information, and the information defining the diagnosis range from the mobile terminal 10 (step S100), and diagnoses the cause of the abnormal sound generated in the vehicle V by the neural network based on these pieces of information (step S110). The diagnosis result obtained in step S110 includes the name of the abnormal sound and the parts that are the source of the abnormal sound. Further, the abnormal sound diagnosis unit 21 determines whether or not the abnormal sound generated in the vehicle V should be reduced by the abnormal sound reduction control executed in the vehicle V based on the name of the abnormal sound and the like obtained in step S110 (step S120).

[0029] When it is determined that the abnormal noise generated in the vehicle V should be reduced by the abnormal noise reduction control (step S120: YES), the abnormal noise diagnosis unit 21 acquires, from the storage device 22, information on the abnormal noise reduction control corresponding to the abnormal noise and sample abnormal noise data (time-axis data) when the abnormal noise occurred (step S130). For example, when the abnormal noise name obtained in step S110 is the "rattling noise during the idling operation of the engine EG" that is reduced by the above pressing control, in step S130, the abnormal noise diagnosis unit 21 acquires from the storage device 22 that the abnormal noise reduction control is the pressing control and the sample abnormal noise data when the rattling noise occurred during the idling operation of the engine EG. Also, when it is determined that the abnormal noise generated in the vehicle V should not be reduced by the abnormal noise reduction control (step S120: NO), the process of step S130 is skipped.

[0030] After the processing of step S120 or S130, the abnormal noise diagnosis unit 21 creates a final diagnosis result based on the diagnosis result and the like in step S110 (step S140). The final diagnosis result by the abnormal noise diagnosis unit 21 includes the abnormal noise name, the component that was the source of the abnormal noise, the cause of the abnormal noise, and measures for eliminating the abnormal noise read from the storage device 22. Also, when the processing of step S130 is executed, the final diagnosis result by the abnormal noise diagnosis unit 21 includes information on the abnormal noise reduction information (for example, recommendation for verification by the execution of the above pressing control and its procedure) and the sample abnormal noise data. Further, the abnormal noise diagnosis unit 21 transmits the result created in step S160 to the mobile terminal 10 and ends the series of processes in FIG. 2.

[0031] When the diagnostic result from the server 20 is received by the mobile terminal 10, the diagnostic result is displayed on the display unit 11. As a result, the operator can accurately explain the diagnostic result from the server 20 to the user of the vehicle V or the like and promptly proceed with countermeasures against abnormal noises. Also, for example, when the abnormal noise diagnosis unit 21 of the server 20 diagnoses that the abnormal noise generated in the vehicle V is the meshing noise during idling operation, the operator can play the sample abnormal noise data from the server 20 and the time-axis data of the sound obtained in the previous reproduction test on the mobile terminal 10 and compare the two, or compare the sample abnormal noise data with the sound actually emitted from the vehicle V to verify the diagnostic result by the server 20. Furthermore, when the abnormal noise diagnosis unit 21 of the server 20 diagnoses that the abnormal noise generated in the vehicle V should be reduced by abnormal noise reduction control, the operator can verify the diagnostic result by the server 20 according to the information on abnormal noise reduction control included in the diagnostic result from the server 20.

[0032] When verifying the diagnostic result by the server 20, the operator connects a terminal such as a personal computer (a terminal different from the mobile terminal 10) installed with a separately prepared diagnostic work tool to the electronic control unit of the vehicle V via a cable (dongle). The diagnostic work tool can output a control signal for abnormal noise reduction control such as pressing control to the vehicle V from the outside in a state where the execution of the abnormal noise reduction device by the electronic control unit of the vehicle V is disabled. Also, the operator connects the mobile terminal 10 to the terminal via short-range wireless communication or a cable, and fixes the external microphone connected to the mobile terminal 10 to the engine compartment of the vehicle V or the like. Then, the operator turns on the start switch of the vehicle V and executes a reproduction test using the diagnostic work tool and the mobile terminal 10.

[0033] When the server 20 diagnoses that a knocking sound is generated during the idle operation of the engine EG in the vehicle V, the reproduction test outputs a control signal from the diagnostic work tool in a state where the engine EG is idling to cause the motor generator MG1 to output the above pressing torque. Further, while the reproduction test is being executed, a signal indicating the output state of the control signal (the output state of the pressing torque) is transmitted from the diagnostic work tool to the communication module 12 of the mobile terminal 10, and the sound acquisition unit 14 of the mobile terminal 10 acquires the time-axis data of the sound from the external microphone in synchronization with the output of the control signal from the diagnostic work tool. Then, as shown in FIG. 5, the display control unit 18 causes the display unit 11 to display the signal waveform (change mode) of the control signal for the abnormal sound reduction control and the sound pressure waveform (change mode) of the time-axis data of the sound acquired by the sound acquisition unit 14 with the time axes aligned.

[0034] Thereby, the operator (the user of the abnormal sound diagnosis system 1) can accurately determine whether the abnormal sound (for example, the knocking sound during idle operation) generated in the vehicle V is the knocking sound that should be reduced by the abnormal sound reduction control (for example, the pressing control) from the change in the sound pressure (the time-axis data of the sound) with respect to the change in the control signal for the abnormal sound reduction control displayed on the display unit 11. That is, when the server 20 diagnoses that a knocking sound is generated during the idle operation of the engine EG in the vehicle V, the pressing control as the abnormal sound reduction control intermittently outputs a pressing torque for eliminating the backlash between the gears to the motor generator MG1 as shown in FIG. 3. Therefore, by checking the change in the sound pressure when the pressing torque is not output from the motor generator MG1 on the display unit 11, it becomes possible to accurately determine whether the abnormal sound generated in the vehicle V is the knocking sound that should be reduced by the pressing control executed in the vehicle V. In the example shown in FIG. 3, since the sound pressure (amplitude) is large when the pressing torque is not output from the motor generator MG1, it is determined that the knocking sound is generated due to some abnormality during the idle operation of the engine EG despite the application of the pressing torque.

[0035] In addition, the abnormal noise diagnosis system 1 includes a display unit 11, an inquiry information acquisition unit 13 that acquires inquiry information, and a sound acquisition unit 14 that acquires time-axis data of sound, and also includes a mobile terminal 10 that exchanges information with the server 20 through communication. This makes it possible to easily acquire the time-axis data of sound, reduce the load on the mobile terminal 10, and obtain a more accurate diagnosis result from the server 20. However, the abnormal noise diagnosis support application installed on the mobile terminal 10 may be installed on a tablet terminal, a laptop-type or desktop-type personal computer, etc., and the tablet terminal or the like may be used instead of the mobile terminal 10. Further, the abnormal noise diagnosis system 1 may be configured by a single information processing device such as a personal computer.

[0036] Furthermore, the abnormal noise to be determined in step S120 of FIG. 2 is not limited to the knocking sound during the idle operation of the engine EG to be reduced by the pressing control, and may be, for example, an abnormal noise generated in the variable valve timing mechanism of the engine as long as it can be reduced by a predetermined abnormal noise reduction control. Also, the abnormal noise reduction control is not limited to outputting torque from the motor generator MG1 or the like, and may be, for example, adjusting the opening degree of an electronically controlled throttle valve. Therefore, the verification of the diagnosis result of the server 20 by comparing the signal waveform (change mode) of the control signal of the abnormal noise reduction control with the sound pressure waveform of the time-axis data of the sound can be performed not only on the vehicle V including the engine, the motor generators MG1 and MG2, and the power transmission mechanism TM, but also on a one-motor type hybrid vehicle including an engine, a motor generator, and a transmission, a vehicle equipped with only an engine as a power generation source, and an electric vehicle.

[0037] Also, when performing a reproduction test according to the diagnosis result from the server 20, instead of using the above diagnosis work tool, the mobile terminal 10 may request the server 20 to transmit a control signal for abnormal noise reduction control, and operate the control target of the abnormal noise reduction control by the control signal transmitted from the server 20 to the in-vehicle communication device. Further, the above diagnosis work tool may be installed in the mobile terminal 10, and in this case, the mobile terminal 10 may output a control signal to operate the control target of the abnormal noise reduction control.

[0038] And the invention of the present disclosure is not limited to the above embodiments at all, and it goes without saying that various changes can be made within the scope of the extension of the present disclosure. Further, the above embodiments are merely a specific form of the invention described in the summary section of the invention, and do not limit the elements of the invention described in the summary section of the invention.

Industrial Applicability

[0039] The invention of the present disclosure is extremely useful for diagnosing abnormal noises generated in a vehicle.

Explanation of Signs

[0040] 1 Abnormal noise diagnosis system, 10 Mobile terminal, 11 Display unit, 12 Communication module, 13 Inquiry information acquisition unit, 14 Sound acquisition unit, 15 Vehicle state acquisition unit, 16 Arithmetic processing unit, 17 Extraction unit, 18 Display control unit, 20 Server (information processing device), 21 Abnormal noise diagnosis unit, 22 Storage device, Ga Counter drive gear, Gb Counter driven gear, Gc Final drive gear, MG1, MG2 Motor generator, PG Planetary gear, TM Power transmission mechanism, V Vehicle.

Claims

Claim 1 A abnormal noise diagnosis system including a terminal that acquires data of sounds emitted from a vehicle and inquiry information regarding abnormal noises generated in the vehicle, and an information processing device that diagnoses the abnormal noises generated in the vehicle based on the sound data and the inquiry information from the terminal, wherein when the terminal diagnoses that the abnormal noise generated in the vehicle by the information processing device should be reduced by abnormal noise reduction control executed in the vehicle, the terminal can cause a display unit to display a change pattern of a control signal of the abnormal noise reduction control and a change pattern of sound data acquired in synchronization with the output of the control signal. Claim 2 In the abnormal noise diagnosis system according to Claim 1, the vehicle includes an electric motor, and the abnormal noise reduction control outputs torque for suppressing generation of the abnormal noise to the electric motor. Claim 3 In the abnormal noise diagnosis system according to Claim 2, the vehicle includes an engine and a power transmission mechanism having a plurality of gears and connected to the engine and the electric motor, the abnormal noise is a tooth impact noise generated in the power transmission mechanism, and the abnormal noise reduction control intermittently outputs pressing torque for filling the backlash between the gears to the electric motor. Claim 4 In the abnormal noise diagnosis system according to any one of Claims 1 to 3, the terminal includes the display unit, a sound acquisition unit that acquires the sound data, and an inquiry information acquisition unit that acquires the inquiry information, and is a portable terminal that exchanges information with the information processing device through communication. Claim 5 In the abnormal noise diagnosis system according to any one of Claims 1 to 3, the information processing device includes a diagnosis unit constructed by machine learning to diagnose a cause of the abnormal noise based on given information.

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