Vehicle Gear Noise Adjustment Method and Related Equipment

Abstract

The present invention discloses a method for adjusting vehicle gear noise and related equipment, which relates to the field of vehicle control and mainly solves the problem of lacking a better method for controlling gear howling. The method includes: determining the gear howling value of a target vehicle at a target constant vehicle speed; and adjusting the torque distribution ratio of the front electric drive system and the rear electric drive system of the target vehicle at the target constant vehicle speed when the gear howling value is greater than a preset howling value, so as to reduce the gear howling value. The present invention is used in the process of adjusting vehicle gear noise.

Description

Technical Field

[0001] The present invention relates to the field of vehicle control, and in particular, to a method for adjusting vehicle gear noise and related equipment. Background Art

[0002] Gear whine in electric drive assemblies and hybrid transmissions is one of the key NVH problems that customers complain about, directly affecting the driving experience of users. The source of whine is the loaded gear. In theory, a pair of gears with perfect involute teeth can output an absolutely uniform angular velocity, but in actual engineering, it is impossible to achieve such perfection. The difference between them is the transmission error, which can be defined as "the error between the actual position and the ideal position of the driven gear given any position of the driving gear". The main factors causing transmission error include geometric shape errors (such as manufacturing / installation errors), deformations (such as changes in meshing stiffness, deformations of shafts / bearings), etc. The transmission error leads to changes in the motion state, and the source of the change in the motion state is force. This force is transmitted through the shaft and bearings to the housing and finally radiates into a whine.

[0003] Solutions to the gear whine problem generally include gear modification to reduce the transmission error, or reducing the radiated noise by improving the housing stiffness, etc. However, all of them require structural changes, which are costly and time-consuming. Especially in the later stage of the vehicle project development, it is more difficult to solve the gear whine problem through structural optimization. Summary of the Invention

[0004] In view of the above problems, the present invention provides a method for adjusting vehicle gear noise and related equipment, mainly aiming to solve the problem of lacking a better method for controlling gear whine.

[0005] To solve the above at least one technical problem, in a first aspect, the present invention provides a method for adjusting vehicle gear noise, the method comprising:

[0006] Determine the gear whine value of the target vehicle at the target constant vehicle speed;

[0007] In the case where the above gear whine value is greater than the preset whine value, adjust the torque distribution ratio of the front electric drive system and the rear electric drive system of the target vehicle at the target constant vehicle speed to reduce the above gear whine value.

[0008] Optionally, the above determining the gear whine value of the target vehicle at the target constant vehicle speed includes:

[0009] Obtain vehicle noise data, wherein the above vehicle noise data includes: the vibration peak frequency of the front and rear reducers and the peak frequency of the in-vehicle noise, wherein the above front electric drive system includes the above front reducer, and the above rear electric drive system includes the above rear reducer;

[0010] When the correlation between the peak vibration frequency of the front reducer and the peak frequency of the vehicle interior noise is greater than a preset correlation, determine the gear howling value of the front reducer and the gear howling value of the rear reducer based on the above vehicle noise data.

[0011] Optionally, the above method further includes:

[0012] Determine the above torque distribution ratio according to the gear howling value of the front reducer of the above front electric drive system and the gear howling value of the rear reducer of the above rear electric drive system.

[0013] Optionally, the above determining the above torque distribution ratio according to the gear howling value of the front reducer of the above front electric drive system and the gear howling value of the rear reducer of the above rear electric drive system includes:

[0014] When the gear howling value of the above front reducer is greater than the gear howling value of the above rear reducer, control the torque allocated to the above front electric drive system to be greater than that of the above rear electric drive system.

[0015] When the gear howling value of the above rear reducer is greater than the gear howling value of the above front reducer, control the torque allocated to the above rear electric drive system to be greater than that of the above front electric drive system.

[0016] Optionally, the above method further includes:

[0017] Determine the optimal torque distribution ratio of the front electric drive system and the rear electric drive system of the target vehicle at each constant vehicle speed, where the above optimal torque distribution ratio is the torque distribution ratio that can minimize the gear howling value of the above target vehicle at the above target constant vehicle speed;

[0018] Establish and correct a mapping model based on the above optimal torque distribution ratio of the front electric drive system and the rear electric drive system at each constant vehicle speed, where the above mapping model is used to determine the optimal torque distribution ratio of the front electric drive system and the rear electric drive system of the above target vehicle at different constant vehicle speeds.

[0019] Optionally, the above determining the optimal torque distribution ratio of the front electric drive system and the rear electric drive system of the target vehicle at each constant vehicle speed includes:

[0020] Determine the optimal torque distribution ratio of the front electric drive system and the rear electric drive system of the target vehicle at each constant vehicle speed through experiments based on the vibration and noise data acquisition and analysis system and the VCU control system.

[0021] Optionally, the above adjusting the torque distribution ratio of the front electric drive system and the rear electric drive system of the target vehicle at the target constant vehicle speed when the above gear howling value is greater than the preset howling value includes:

[0022] When the above-mentioned gear howling value is greater than the preset howling value, based on the above mapping model, adjust the torque distribution ratio of the front electric drive system and the rear electric drive system of the target vehicle at the target constant speed.

[0023] In a second aspect, an embodiment of the present invention further provides a vehicle gear noise adjustment device, including:

[0024] A first determination unit, configured to determine the gear howling value of the target vehicle at the target constant speed;

[0025] A second determination unit, configured to adjust the torque distribution ratio of the front electric drive system and the rear electric drive system of the target vehicle at the target constant speed when the above-mentioned gear howling value is greater than the preset howling value, so as to reduce the above-mentioned gear howling value.

[0026] To achieve the above object, according to a third aspect of the present invention, there is provided a computer-readable storage medium, where the computer-readable storage medium includes a stored program, and when the program is executed by a processor, the steps of the above-mentioned vehicle gear noise adjustment method are implemented.

[0027] To achieve the above object, according to a fourth aspect of the present invention, there is provided an electronic device, including at least one processor and at least one memory connected to the above-mentioned processor; wherein, the above-mentioned processor is used to call program instructions in the above-mentioned memory and execute the steps of the above-mentioned vehicle gear noise adjustment method.

[0028] By means of the above technical solutions, for the problem of lacking a better method to control gear howling, the vehicle gear noise adjustment method and related devices provided by the present invention determine the gear howling value of the target vehicle at the target constant speed; when the above-mentioned gear howling value is greater than the preset howling value, adjust the torque distribution ratio of the front electric drive system and the rear electric drive system of the target vehicle at the target constant speed, so as to reduce the above-mentioned gear howling value. In the above solution, by comparing the gear howling value of the vehicle at the constant speed with the preset value, if the gear howling value is greater than the preset value, it proves that the gear howling at this constant speed will have a greater adverse impact on the user. Therefore, the gear howling at this constant speed is adjusted. Since the magnitude of gear howling is positively correlated with the transmission error, the greater the transmission error, the greater the gear howling. Under the condition of constant-speed driving, the total vehicle demand torque is very small, usually within a dozen Nm, and within a small torque range, the transmission error usually decreases with the increase of torque. Therefore, by adjusting the torque distribution ratio of the vehicle to the front electric drive system and the rear electric drive system, the gear howling can be reduced as much as possible, thereby improving the sound experience of the in-vehicle users, enhancing the competitiveness of the vehicle model, and achieving the effect of low-cost and rapid improvement of gear howling and shortening the project development cycle without changing and adding vehicle components, but through the control system.

[0029] Accordingly, the vehicle gear noise adjustment device, equipment, and computer-readable storage medium provided by the embodiments of the present invention also have the above technical effects.

[0030] The above description is only an overview of the technical solution of the present invention. In order to be able to understand the technical means of the present invention more clearly, it can be implemented according to the content of the specification. And in order to make the above and other purposes, features, and advantages of the present invention more obvious and understandable, the following specifically illustrates the specific embodiments of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] By reading the following detailed description of the preferred embodiments, various other advantages and benefits will become clear to those of ordinary skill in the art. The drawings are only for the purpose of showing the preferred embodiments and are not considered to be a limitation of the present invention. And throughout the drawings, the same reference numerals are used to represent the same components. In the drawings:

[0032] Figure 1 shows a schematic flowchart of a vehicle gear noise adjustment method provided by an embodiment of the present invention;

[0033] Figure 2 shows a schematic composition diagram of a regulation system provided by an embodiment of the present invention;

[0034] Figure 3 shows a schematic block diagram of the composition of a vehicle gear noise adjustment device provided by an embodiment of the present invention;

[0035] Figure 4 shows a schematic block diagram of the composition of a vehicle gear noise adjustment electronic device provided by an embodiment of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0036] Hereinafter, the exemplary embodiments of the present invention will be described in more detail with reference to the drawings. Although the exemplary embodiments of the present invention are shown in the drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided so that the present invention can be more thoroughly understood and the scope of the present invention can be fully conveyed to those skilled in the art.

[0037] To solve the problem of the lack of a better method for controlling gear howling, an embodiment of the present invention provides a vehicle gear noise adjustment method, as Figure 1 shown, the method includes:

[0038] S101. Determine the gear howling value of the target vehicle at the target constant vehicle speed;

[0039] Exemplarily, when the vehicle is traveling at a constant speed, the gear howling value of the vehicle can be obtained through devices such as microphones. Since the overall vehicle demand torque is very small under the constant-speed driving condition, and the transmission error is controllable within the small torque range, the method obtains the gear howling value of the vehicle at a constant speed and adjusts the torque for the gear howling value at a constant speed.

[0040] S102. When the above gear howling value is greater than the preset howling value, adjust the torque distribution ratio of the front electric drive system and the rear electric drive system of the target vehicle at the target constant speed to reduce the above gear howling value.

[0041] Exemplarily, compare the gear howling value of the vehicle at a constant speed with the preset howling value. The above preset howling value is determined according to the actual business situation and can be the howling value critical point at which users have a bad experience. If the collected howling value is greater than the preset howling value, it proves that the gear howling value at this constant speed will cause greater adverse effects on users. Therefore, adjust the gear howling at this constant speed. Under the constant-speed driving condition, the overall vehicle demand torque is small, and the transmission error usually decreases with the increase of torque within the small torque range. Therefore, increasing the torque of the electric drive system under the constant-speed driving condition can reduce the gear howling. Therefore, the torque distribution ratio of the front electric drive system and the rear electric drive system of the target vehicle at the target constant speed can be adjusted to achieve the effect of reducing the gear howling value to improve the sound experience of users in the vehicle.

[0042] By means of the above technical solution, for the problem of lacking a better method to control gear howling in the vehicle gear noise adjustment method provided by the present invention, the present invention determines the gear howling value of the target vehicle at the target constant speed; when the above gear howling value is greater than the preset howling value, adjust the torque distribution ratio of the front electric drive system and the rear electric drive system of the target vehicle at the target constant speed to reduce the above gear howling value. In the above solution, compare the gear howling value of the vehicle at a constant speed with the preset value. If the gear howling value is greater than the preset value, it proves that the gear howling at this constant speed will cause greater adverse effects on users. Therefore, adjust the gear howling at this constant speed. Since the size of the gear howling is positively correlated with the transmission error, the greater the transmission error, the greater the gear howling. Under the constant-speed driving condition, the overall vehicle demand torque is very small, usually within a dozen Nm, and the transmission error is within the small torque range and usually decreases with the increase of torque. Therefore, the torque distribution ratio of the vehicle to the front electric drive system and the rear electric drive system can be adjusted to achieve the effect of minimizing the gear howling to improve the sound experience of users in the vehicle, improving the competitiveness of the vehicle model. And since there is no change or addition of vehicle components, but through the control system, the effect of low-cost and rapid improvement of gear howling and shortening the project development cycle is achieved.

[0043] In one embodiment, determining the gear howling value of the target vehicle at the target constant speed includes:

[0044] Obtain vehicle noise data, where the vehicle noise data includes: the vibration peak frequencies of the front and rear reducers and the peak frequency of the in-vehicle noise. The front electric drive system includes the front reducer, and the rear electric drive system includes the rear reducer;

[0045] When the correlation between the vibration peak frequencies of the front and rear reducers and the peak frequency of the in-vehicle noise is greater than a preset correlation, determine the gear howling value of the front reducer and the gear howling value of the rear reducer based on the vehicle noise data.

[0046] Exemplarily, first obtain the collected vehicle noise data. However, since there are not only gear howling noises from the front and rear reducers in the whole vehicle, but also other noises, and this solution only targets gear howling for regulation, it is also necessary to perform vibration and noise spectrum analysis and filtered playback on the collected vehicle noise data. By comparing the correlation between the vibration peak frequencies of the obtained front and rear reducers and the peak frequency of the in-vehicle noise, it is determined whether the in-vehicle noise is related to the front and rear reducers. If the correlation between the vibration peak frequencies of the front and rear reducers and the peak frequency of the in-vehicle noise is greater than the preset correlation, it can be determined that the in-vehicle noise is mainly the gear howling value of the front reducer and the gear howling value of the rear reducer. If the correlation between the vibration peak frequencies of the front and rear reducers and the peak frequency of the in-vehicle noise is less than or equal to the preset correlation, it proves that the peak frequency of the in-vehicle noise is inconsistent with the vibration peak frequencies of the front and rear reducers. Therefore, the in-vehicle noise is not mainly caused by the front and rear reducers, and thus the vehicle torque distribution cannot be regulated based on this. The above correlation mainly includes whether the peak frequency of the in-vehicle noise corresponds to the gear order, whether the peak frequency of the in-vehicle noise is positively correlated with the vibration peak frequencies of the front and rear reducers, and whether the peak frequency of the in-vehicle noise is consistent with the vibration peak frequencies of the front and rear reducers. Thus, the situation of other noise interfering with the judgment result is taken into account, ensuring that the premise of implementing this method is that the gear howling value affects the user rather than being affected by other noises.

[0047] In one embodiment, the above method further includes:

[0048] Determine the torque distribution ratio according to the gear howling value of the front reducer of the front electric drive system and the gear howling value of the rear reducer of the rear electric drive system.

[0049] Exemplarily, since the transmission error generally decreases with the increase of torque within a small torque range, increasing the torque of the electric drive system under the condition of constant-speed driving can reduce gear whine. Therefore, after obtaining the gear whine values of the front reducer of the front electric drive system and the gear whine values of the rear reducer of the rear electric drive system, the torque distribution ratio can be determined based on the magnitudes of the two whine values, thereby achieving the technical effect of balancing gear whine by distributing torque.

[0050] In one embodiment, determining the torque distribution ratio according to the gear whine value of the front reducer of the front electric drive system and the gear whine value of the rear reducer of the rear electric drive system includes:

[0051] When the gear whine value of the front reducer is greater than the gear whine value of the rear reducer, control the torque allocated to the front electric drive system to be greater than that of the rear electric drive system.

[0052] When the gear whine value of the rear reducer is greater than the gear whine value of the front reducer, control the torque allocated to the rear electric drive system to be greater than that of the front electric drive system.

[0053] Exemplarily, for the constant-speed driving condition, the vehicle's total demand torque is very small. Since the transmission error generally decreases with the increase of torque within a small torque range, gear whine can be reduced by increasing the torque of the electric drive system. After judgment, if the gear whine mainly comes from the gears of the front reducer, increase the torque of the front electric drive system and reduce the torque of the rear electric drive system, that is, under the condition of ensuring the vehicle's total demand torque remains unchanged, reduce the gear whine of the front reducer by increasing the torque distribution ratio of the front electric drive system; if the gear whine mainly comes from the gears of the rear reducer, increase the torque of the rear electric drive system and reduce the torque of the front electric drive system, that is, under the condition of ensuring the vehicle's total demand torque remains unchanged, reduce the gear whine of the rear reducer by increasing the torque distribution ratio of the rear electric drive system, thereby achieving the technical effect of balancing gear whine by distributing torque.

[0054] In one embodiment, the method further includes:

[0055] Determine the optimal torque distribution ratio of the front electric drive system and the rear electric drive system of the target vehicle at each constant-speed vehicle speed, where the optimal torque distribution ratio is the torque distribution ratio that can minimize the gear whine value of the target vehicle at the target constant-speed vehicle speed;

[0056] Based on the optimal torque distribution ratio of the front electric drive system and the rear electric drive system at each constant-speed vehicle speed, establish and correct a mapping model, where the mapping model is used to determine the optimal torque distribution ratio of the front electric drive system and the rear electric drive system of the target vehicle at different constant-speed vehicle speeds.

[0057] Exemplarily, the optimal torque distribution ratio for each constant vehicle speed of the target vehicle can be determined through experiments, that is, the ratio that can minimize the vehicle howling value at the current vehicle speed. When the vehicle is traveling at a constant speed, the optimal torque distribution ratio is determined by comparing the noise peaks of gear howling at different torque distribution ratios, and a mapping model of the optimal torque distribution ratios at all constant vehicle speeds is established and stored in the vehicle. During the actual driving process of the vehicle, the torque distribution ratio can be directly adjusted according to the mapping model, without the need to temporarily obtain the gear howling value and determine the optimal torque distribution ratio temporarily, saving computing power. Moreover, during the actual driving process of the vehicle, the above mapping model will be continuously improved according to temporary and unexpected situations, so that the above mapping model not only has experimental theoretical values but also better fits the actual situation of the vehicle.

[0058] In one embodiment, the determination of the optimal torque distribution ratios of the front electric drive system and the rear electric drive system of the target vehicle at each constant vehicle speed includes:

[0059] Based on the vibration and noise data acquisition and analysis system and the VCU control system, the optimal torque distribution ratios of the front electric drive system and the rear electric drive system of the target vehicle at each constant vehicle speed are determined through experiments.

[0060] Exemplarily, for the target vehicle, the optimal torque distribution ratios of the front electric drive system and the rear electric drive system at the current constant vehicle speed can be determined based on experiments. The specific process of allocating torque according to the gear howling value can be completed by the vibration and noise data acquisition and analysis system and the VCU control system of the above control system.

[0061] Exemplarily, the above vibration and noise data acquisition and analysis system includes a microphone and an acceleration sensor for acquiring and analyzing the gear howling values of the front and rear reducers. The above VCU control system can adjust the torque distribution ratios of the above front electric drive system and the rear electric drive system. Through the coordination between the vibration and noise data acquisition and analysis system and the VCU control system, it can be determined how to allocate the torque of the front electric drive system and the rear electric drive system of the target vehicle at the target constant vehicle speed to reduce the gear howling value.

[0062] In one embodiment, when the above gear howling value is greater than the preset howling value, the adjustment of the torque distribution ratios of the front electric drive system and the rear electric drive system of the target vehicle at the target constant vehicle speed includes:

[0063] When the above gear howling value is greater than the preset howling value, the torque distribution ratios of the front electric drive system and the rear electric drive system of the target vehicle at the target constant vehicle speed are adjusted based on the above mapping model.

[0064] Exemplarily, after determining the above mapping model, the mapping model is stored and applied to the vehicle. During the actual driving process of the target vehicle, if the above gear howling value is greater than the preset howling value, the optimal torque distribution ratio of the current front electric drive system and rear electric drive system is determined based on the current constant vehicle speed of the target vehicle and the above mapping model, and adjustment is made based on this, so as to ensure that during the actual driving process of the vehicle, the gear howling value can be quickly and timely reduced to as low as possible.

[0065] Further, as an implementation of the above Figure 1 shown method, an embodiment of the present invention also provides a schematic composition diagram of a control system, as Figure 2 shown. Four microphones (respectively: Mic:01, Mic:02, Mic:03, Mic:04) are fixed through microphone fixing brackets. Among them, Mic:01 is installed about 10 cm to the right of the reducer of the front electric drive system, Mic:02 is installed on the right side of the driver's seat, that is, at the position of the driver's right ear, Mic:03 is installed on the left side of the right rear seat, that is, at the position of the left ear of the passenger in the right rear seat, and Mic:04 is installed about 10 cm to the right of the reducer of the rear electric drive system; two acceleration sensors (respectively: Vib:01, Vib:02) are installed at the bearing seats of the reducers of the front electric drive system and the rear electric drive system. The four microphones and the two acceleration sensors are connected to the vibration and noise data acquisition and analysis system through cables. The OBD diagnostic port is connected to the above vibration and noise data acquisition and analysis system and the above VCU control system respectively through a one-to-two OBD conversion cable, thereby constituting the above control system. This system can collect the gear howling value when the vehicle does not perform torque distribution and the gear howling values under different torque distribution ratios.

[0066] Further, as an implementation of the above Figure 1 shown method, an embodiment of the present invention also provides a vehicle gear noise adjustment device for implementing the above Figure 1 shown method. The device embodiment corresponds to the foregoing method embodiment. For the convenience of reading, the details in the foregoing method embodiment will not be repeated one by one in this device embodiment, but it should be clear that the device in this embodiment can correspondingly implement all the contents in the foregoing method embodiment. As Figure 3 shown, the device includes: a first determination unit 21 and a second determination unit 22, where

[0067] The first determination unit 21 is used to determine the gear howling value of the target vehicle at the target constant vehicle speed;

[0068] A second determination unit 22, configured to, when the above gear howling value is greater than a preset howling value, adjust the torque distribution ratio between the front electric drive system and the rear electric drive system of the target vehicle at the target constant speed, so as to reduce the above gear howling value.

[0069] Exemplarily, determining the gear howling value of the target vehicle at the target constant speed includes:

[0070] Obtain vehicle noise data, where the vehicle noise data includes: the vibration peak frequencies of the front and rear reducers and the peak frequency of the in-vehicle noise, where the front electric drive system includes the front reducer, and the rear electric drive system includes the rear reducer;

[0071] When the correlation between the vibration peak frequencies of the front and rear reducers and the peak frequency of the in-vehicle noise is greater than a preset correlation, determine the gear howling value of the front reducer and the gear howling value of the rear reducer based on the vehicle noise data.

[0072] Exemplarily, the above unit is further configured to:

[0073] Determine the torque distribution ratio according to the gear howling value of the front reducer of the front electric drive system and the gear howling value of the rear reducer of the rear electric drive system.

[0074] Exemplarily, determining the torque distribution ratio according to the gear howling value of the front reducer of the front electric drive system and the gear howling value of the rear reducer of the rear electric drive system includes:

[0075] When the gear howling value of the front reducer is greater than the gear howling value of the rear reducer, control the torque allocated to the front electric drive system to be greater than that of the rear electric drive system,

[0076] When the gear howling value of the rear reducer is greater than the gear howling value of the front reducer, control the torque allocated to the rear electric drive system to be greater than that of the front electric drive system.

[0077] Exemplarily, the above unit is further configured to:

[0078] Determine the optimal torque distribution ratio between the front electric drive system and the rear electric drive system of the target vehicle at each constant speed, where the optimal torque distribution ratio is the torque distribution ratio that can minimize the gear howling value of the target vehicle at the target constant speed;

[0079] Establish and correct a mapping model based on the optimal torque distribution ratio between the front electric drive system and the rear electric drive system at each constant speed, where the mapping model is used to determine the optimal torque distribution ratio between the front electric drive system and the rear electric drive system of the target vehicle at different constant speeds.

[0080] Exemplarily, the above determination of the optimal torque distribution ratios of the front electric drive system and the rear electric drive system of the target vehicle at each constant vehicle speed includes:

[0081] Based on the vibration and noise data acquisition and analysis system and the VCU control system, determine the optimal torque distribution ratios of the front electric drive system and the rear electric drive system of the target vehicle at each constant vehicle speed through experiments.

[0082] Exemplarily, the above adjustment of the torque distribution ratios of the front electric drive system and the rear electric drive system of the target vehicle at the target constant vehicle speed when the above gear howling value is greater than the preset howling value includes:

[0083] When the above gear howling value is greater than the preset howling value, adjust the torque distribution ratios of the front electric drive system and the rear electric drive system of the target vehicle at the target constant vehicle speed based on the above mapping model.

[0084] With the above technical solution, for the problem of lacking a better method to control gear howling, the vehicle gear noise adjustment device provided by the present invention determines the gear howling value of the target vehicle at the target constant vehicle speed; when the above gear howling value is greater than the preset howling value, adjust the torque distribution ratios of the front electric drive system and the rear electric drive system of the target vehicle at the target constant vehicle speed to reduce the above gear howling value. In the above solution, by comparing the gear howling value of the vehicle at the constant vehicle speed with the preset value, if the gear howling value is greater than the preset value, it proves that the gear howling at this constant vehicle speed will have a greater adverse impact on the user. Therefore, the gear howling at this constant vehicle speed is adjusted. Since the size of the gear howling is positively correlated with the transmission error, the greater the transmission error, the greater the gear howling. Under the working condition of constant-speed driving, the total vehicle demand torque is very small, usually within a dozen Nm, and within the small torque range of the transmission error, it usually decreases with the increase of the torque. Therefore, by adjusting the torque distribution ratios of the vehicle to the front electric drive system and the rear electric drive system, the gear howling can be reduced as much as possible, thereby improving the sound experience of the in-vehicle users, enhancing the competitiveness of the vehicle model, and since there is no change or addition of vehicle components, but through the control system, the gear howling is improved quickly at low cost, and the project development cycle is shortened.

[0085] The processor contains a kernel, and the corresponding program unit is retrieved from the memory by the kernel. One or more kernels can be set, and by adjusting the kernel parameters, a method for adjusting vehicle gear noise can be implemented, which can solve the problem of lacking a better method to control gear howling.

[0086] The embodiment of the present invention provides a computer-readable storage medium, and the above computer-readable storage medium includes a stored program, and when the program is executed by a processor, the above vehicle gear noise adjustment method is implemented.

[0087] An embodiment of the present invention provides a processor, which is used to run a program. When the program runs, it executes the vehicle gear noise adjustment method.

[0088] An embodiment of the present invention provides an electronic device, which includes at least one processor and at least one memory connected to the processor; wherein, the processor is used to call program instructions in the memory to execute the vehicle gear noise adjustment method as described above.

[0089] An embodiment of the present invention provides an electronic device 30, as Figure 4 shown, the electronic device includes at least one processor 301, at least one memory 302 connected to the processor, and a bus 303; wherein, the processor 301 and the memory 302 complete communication with each other through the bus 303; the processor 301 is used to call program instructions in the memory to execute the vehicle gear noise adjustment method as described above.

[0090] The intelligent electronic device in this article can be a PC, a PAD, a mobile phone, etc.

[0091] The present application also provides a computer program product, which is suitable for executing a program initialized with the following method steps when executed on a process management electronic device:

[0092] Determine the gear howling value of the target vehicle at the target constant driving speed;

[0093] When the gear howling value is greater than the preset howling value, adjust the torque distribution ratio of the front electric drive system and the rear electric drive system of the target vehicle at the target constant driving speed to reduce the gear howling value.

[0094] Further, the determining the gear howling value of the target vehicle at the target constant driving speed includes:

[0095] Obtain vehicle noise data, where the vehicle noise data includes: the vibration peak frequency of the front and rear reducers and the peak frequency of the in-vehicle noise. The front electric drive system includes the front reducer, and the rear electric drive system includes the rear reducer;

[0096] When the correlation between the vibration peak frequencies of the front and rear reducers and the peak frequency of the in-vehicle noise is greater than the preset correlation, determine the gear howling value of the front reducer and the gear howling value of the rear reducer based on the vehicle noise data.

[0097] Further, the method further includes:

[0098] Determine the above torque distribution ratio based on the gear howling value of the front reducer of the above front electric drive system and the gear howling value of the rear reducer of the above rear electric drive system.

[0099] Further, the above determining the above torque distribution ratio based on the gear howling value of the front reducer of the above front electric drive system and the gear howling value of the rear reducer of the above rear electric drive system includes:

[0100] When the gear howling value of the above front reducer is greater than the gear howling value of the above rear reducer, control the torque allocated to the above front electric drive system to be greater than that of the above rear electric drive system.

[0101] When the gear howling value of the above rear reducer is greater than the gear howling value of the above front reducer, control the torque allocated to the above rear electric drive system to be greater than that of the above front electric drive system.

[0102] Further, the above method further includes:

[0103] Determine the optimal torque distribution ratio of the front electric drive system and the rear electric drive system of the target vehicle at each constant driving speed, where the above optimal torque distribution ratio is the torque distribution ratio that can minimize the gear howling value of the above target vehicle at the above target constant driving speed;

[0104] Establish and correct a mapping model based on the optimal torque distribution ratio of the front electric drive system and the rear electric drive system at each constant driving speed, where the above mapping model is used to determine the optimal torque distribution ratio of the front electric drive system and the rear electric drive system of the above target vehicle at different constant driving speeds.

[0105] Further, the above determining the optimal torque distribution ratio of the front electric drive system and the rear electric drive system of the target vehicle at each constant driving speed includes:

[0106] Determine the optimal torque distribution ratio of the front electric drive system and the rear electric drive system of the target vehicle at each constant driving speed through experiments based on the vibration and noise data acquisition and analysis system and the VCU control system.

[0107] Further, the above adjusting the torque distribution ratio of the front electric drive system and the rear electric drive system of the target vehicle at the target constant driving speed when the above gear howling value is greater than the preset howling value includes:

[0108] When the above gear howling value is greater than the preset howling value, adjust the torque distribution ratio of the front electric drive system and the rear electric drive system of the target vehicle at the target constant driving speed based on the above mapping model.

[0109] This application is described with reference to the flowcharts and / or block diagrams of methods, electronic devices (systems), and computer program products according to embodiments of the present application. It should be understood that each flow and / or block in the flowcharts and / or block diagrams, as well as the combination of flows and / or blocks in the flowcharts and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to the processors of general-purpose computers, special-purpose computers, embedded processors, or other programmable process management electronic devices to generate a machine, such that the instructions executed by the processors of the computer or other programmable process management electronic devices generate means for implementing the functions specified in one process Figure 1 one process or multiple processes and / or blocks Figure 1 means for implementing the functions specified in one block or multiple blocks.

[0110] In a typical configuration, an electronic device includes one or more processors (CPUs), a memory, and a bus. The electronic device may also include an input / output interface, a network interface, etc.

[0111] The memory may include non-permanent memory in the form of computer-readable media, random access memory (RAM), and / or non-volatile memory such as read-only memory (ROM) or flash memory (flash RAM). The memory includes at least one memory chip. The memory is an example of computer-readable media.

[0112] Computer-readable media includes permanent and non-permanent, removable and non-removable media that can store information by any method or technology. The information can be computer-readable instructions, data structures, program modules, or other data. Examples of computer-readable storage media for a computer include, but are not limited to, phase change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technologies, compact disc read-only memory (CD-ROM), digital versatile disc (DVD) or other optical storage, magnetic cassette tapes, magnetic disk storage or other magnetic storage electronic devices, or any other non-transmission media that can be used to store information accessible by a computing electronic device. As defined herein, computer-readable media does not include transitory computer-readable media, such as modulated data signals and carrier waves.

[0113] It should also be noted that the term "comprise", "include" or any other variant thereof is intended to cover non-exclusive inclusion, such that a process, method, commodity or electronic device comprising a series of elements not only includes those elements but also includes other elements not expressly listed, or further includes elements inherent to such process, method, commodity or electronic device. Without further limitation, an element defined by the statement "comprising an..." does not preclude the presence of additional identical elements in the process, method, commodity or electronic device comprising the element.

[0114] Those skilled in the art should understand that the embodiments of the present application can be provided as a method, a system or a computer program product. Therefore, the present application can take the form of a complete hardware embodiment, a complete software embodiment or an embodiment combining software and hardware aspects. Moreover, the present application can take the form of a computer program product implemented on one or more computer-usable computer-readable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0115] The above are only embodiments of the present application and are not intended to limit the present application. For those skilled in the art, various changes and modifications can be made to the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included within the scope of the claims of the present application.

Claims

1. A method for adjusting vehicle gear noise, characterized in that, it includes: Determine the gear howling value of the target vehicle at the target constant driving speed; When the gear howling value is greater than the preset howling value, adjust the torque distribution ratio of the front electric drive system and the rear electric drive system of the target vehicle at the target constant driving speed to reduce the gear howling value; The determination of the gear howling value of the target vehicle at the target constant driving speed includes: Obtain vehicle noise data, where the vehicle noise data includes: the vibration peak frequency of the front and rear reducers and the peak frequency of the in-vehicle noise, where the front electric drive system includes the front reducer, and the rear electric drive system includes the rear reducer; When the correlation between the vibration peak frequencies of the front and rear reducers and the peak frequency of the in-vehicle noise is greater than the preset correlation, determine the gear howling value of the front reducer and the gear howling value of the rear reducer based on the vehicle noise data; Determine the torque distribution ratio according to the gear howling value of the front reducer of the front electric drive system and the gear howling value of the rear reducer of the rear electric drive system; The determination of the torque distribution ratio according to the gear howling value of the front reducer of the front electric drive system and the gear howling value of the rear reducer of the rear electric drive system includes: When the gear howling value of the front reducer is greater than the gear howling value of the rear reducer, control the torque allocated to the front electric drive system to be greater than that of the rear electric drive system, When the gear howling value of the rear reducer is greater than the gear howling value of the front reducer, control the torque allocated to the rear electric drive system to be greater than that of the front electric drive system.

2. The method according to claim 1, characterized in that, it further includes: Determine the optimal torque distribution ratio of the front electric drive system and the rear electric drive system of the target vehicle at each constant driving speed, where the optimal torque distribution ratio is the torque distribution ratio that can minimize the gear howling value of the target vehicle at the target constant driving speed; Establish and correct a mapping model based on the optimal torque distribution ratio of the front electric drive system and the rear electric drive system at each constant driving speed, where the mapping model is used to determine the optimal torque distribution ratio of the front electric drive system and the rear electric drive system of the target vehicle at different constant driving speeds.

3. The method according to claim 2, characterized in that, The determination of the optimal torque distribution ratio of the front electric drive system and the rear electric drive system of the target vehicle at each constant driving speed includes: Based on the vibration and noise data acquisition and analysis system and the VCU control system, determine the optimal torque distribution ratio of the front electric drive system and the rear electric drive system of the target vehicle at each constant driving speed through experiments.

4. The method according to claim 2, characterized in that, When the gear howling value is greater than the preset howling value, the adjustment of the torque distribution ratio of the front electric drive system and the rear electric drive system of the target vehicle at the target constant driving speed includes: When the gear howling value is greater than the preset howling value, adjust the torque distribution ratio of the front electric drive system and the rear electric drive system of the target vehicle at the target constant driving speed based on the mapping model.

5. A vehicle gear noise adjustment device, characterized in that, a first determination unit, configured to determine the gear howling value of the target vehicle at a target constant vehicle speed; a second determination unit, configured to adjust the torque distribution ratio of the front electric drive system and the rear electric drive system of the target vehicle at the target constant vehicle speed to reduce the gear howling value when the gear howling value is greater than a preset howling value; The determination of the gear howling value of the target vehicle at the target constant vehicle speed includes: obtaining vehicle noise data, where the vehicle noise data includes: the vibration peak frequency of the front and rear reducers and the peak frequency of the in-vehicle noise, where the front electric drive system includes the front reducer, and the rear electric drive system includes the rear reducer; when the correlation between the vibration peak frequency of the front and rear reducers and the peak frequency of the in-vehicle noise is greater than a preset correlation, determining the gear howling value of the front reducer and the gear howling value of the rear reducer based on the vehicle noise data; determining the torque distribution ratio according to the gear howling value of the front reducer of the front electric drive system and the gear howling value of the rear reducer of the rear electric drive system; The determination of the torque distribution ratio according to the gear howling value of the front reducer of the front electric drive system and the gear howling value of the rear reducer of the rear electric drive system includes: when the gear howling value of the front reducer is greater than the gear howling value of the rear reducer, controlling the torque allocated to the front electric drive system to be greater than that of the rear electric drive system, when the gear howling value of the rear reducer is greater than the gear howling value of the front reducer, controlling the torque allocated to the rear electric drive system to be greater than that of the front electric drive system.

6. A computer-readable storage medium, characterized in that, the computer-readable storage medium includes a stored program, where when the program is executed by a processor, the steps of the vehicle gear noise adjustment method according to any one of claims 1 to 4 are implemented.

7. An electronic device, characterized in that, the electronic device includes at least one processor and at least one memory connected to the processor; wherein, the processor is configured to call program instructions in the memory to execute the steps of the vehicle gear noise adjustment method according to any one of claims 1 to 4.

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