Method, system and equipment for processing abnormal sound of hybrid gearbox under idling working condition and medium

Abstract

The invention provides a method, a system, equipment and a medium for processing abnormal sound of a hybrid gearbox under an idling condition, which are used for respectively detecting knocking abnormal sound information of the hybrid gearbox and rotating speed information of an engine, and reading rotating speed information of an input shaft of the hybrid gearbox; configuring a motor regulation and control rotating speed model based on the motor rotating speed, the input shaft rotating speed, the engine rotating speed and the P1 planet row speed ratio coefficient; when knocking abnormal sound exists in the hybrid gearbox, the rotating speed of an input shaft is obtained; the rotating speed of the input shaft is adjusted, and when the hybrid gearbox has no knocking abnormal sound, the motor rotating speed at the moment is calculated based on the motor regulation and control rotating speed model and serves as motor rotating speed information under the idling working condition, so that the abnormal sound state is eliminated. And the rotating speed information of the motor is stored as a standard reference value under the idling working condition for real-time regulation and control in the subsequent operation process, so that the hybrid gearbox is ensured to be in a stable and abnormal-sound-free working state under the idling working condition.

Description

Technical Field

[0001] The present invention belongs to the technical field of hybrid transmissions, and in particular relates to a method, system, equipment and medium for processing abnormal noise of a hybrid transmission under idle conditions. Background Art

[0002] In a multi-speed hybrid transmission, there are multiple planetary gear sets, clutches and brakes. In certain gears and working conditions, there are unloaded planetary gears and clutches. When the hybrid transmission is in pure electric working conditions, it will not cause abnormal noises from the planetary gears or clutches. When the engine is started, due to the large fluctuations in speed and torque under the engine idle condition, the unloaded planetary gear set or clutch will produce abnormal noises.

[0003] The existing solution is to add a tolerance ring to the input shaft end of the transmission. The disadvantage of this method is that it requires additional parts, resulting in poor stability of the entire machine. When the torque fluctuation is too large, the tolerance ring will deform more and more, resulting in a weakened optimization effect.

[0004] Another way in the prior art is to solve the abnormal noise through slip clutch control, which increases the no-load gear torque and also causes the clutch slip time to be too long, affecting the clutch performance. Summary of the invention

[0005] The present invention provides a method for processing abnormal noise of a hybrid transmission under idle conditions, which can obtain abnormal noise information of the hybrid transmission under idle conditions and perform optimization processing to ensure that the hybrid transmission is in a stable working state without abnormal noise under idle conditions, thereby improving the driving comfort and operation reliability of the vehicle.

[0006] Methods include: Detect the knocking and abnormal noise information of the hybrid transmission and the engine speed information respectively, and read the input shaft speed information of the hybrid transmission; Configure the motor speed control model based on motor speed, input shaft speed, engine speed, and P1 planetary gear ratio coefficient; When there is knocking noise in the hybrid transmission, obtain the input shaft speed; Adjust the input shaft speed, and when there is no knocking noise in the hybrid transmission, calculate the motor speed at this time based on the motor speed control model, and use it as the motor speed information under idle conditions.

[0007] It should be further explained that the motor speed control model is configured based on the motor speed, input shaft speed, engine speed, and P1 planetary gear ratio coefficient: Ns+K*Nr-(K+1)Npc=0; Among them, Ns is the motor speed, Nr is the input shaft speed, Npc is the engine speed, and K is the P1 planetary gear ratio coefficient.

[0008] It should be further explained that the step of calculating the motor speed at this time based on the motor speed control model when there is no knocking abnormal sound in the hybrid transmission also includes: after the motor executes the motor speed, performing a hybrid transmission abnormal sound test verification under idle conditions; When there is no knocking noise in the hybrid transmission, the motor speed information is defined as the motor speed information under idle condition.

[0009] It should be further explained that the method further includes: after the motor performs speed avoidance, starting the vehicle to place the vehicle in an idle state; Configure the engine and motor to run according to the adjusted motor speed information; Collecting vibration acceleration signals of the hybrid transmission within a preset time period; The collected vibration acceleration signal is analyzed based on the time domain analysis method, and the time domain signal is converted into a frequency domain signal through fast Fourier transform to analyze the frequency signal of the vibration; When the characteristic frequency signal within the abnormal noise speed range disappears, or is lower than the preset frequency, it is defined as a hybrid transmission with no knocking noise.

[0010] It should be further explained that in the method, after the motor performs speed avoidance, the vehicle is started to put the vehicle in an idling condition; Configure the engine and motor to run according to the adjusted motor speed information; Collecting sound signals of the hybrid transmission within a preset time period; Analyze the collected sound signals based on sound pressure level analysis and analyze the sound pressure levels at different frequencies; If the sound pressure level of the frequency component related to the abnormal sound is lower than the sound pressure level based on the standard, it is defined as a hybrid transmission without knocking abnormal sound.

[0011] The present application also provides a hybrid transmission abnormal noise processing system under idle conditions, the system comprising: a speed sensor, a vibration acceleration sensor, a test terminal and a host computer; The speed sensor is installed close to the flywheel teeth; The vibration acceleration sensor is attached to the housing surface of the hybrid gearbox; The test terminal is respectively connected to the speed sensor, the vibration acceleration sensor and the transmission controller to obtain engine speed information, knocking noise information and input shaft speed information; The test terminal transmits the engine speed information, knocking noise information and input shaft speed information to the host computer through communication connection with the host computer; The host computer obtains the input shaft speed based on the knocking noise information, engine speed information and input shaft speed information, combined with the motor speed control model; when there is knocking noise in the hybrid transmission, the input shaft speed is obtained; The host computer sends a control command to the transmission controller to adjust the input shaft speed. When there is no knocking or abnormal noise in the hybrid transmission, the motor speed at this time is calculated based on the motor speed control model and used as the motor speed information under idle conditions.

[0012] It should be further explained that it also includes: P1 planetary gear, generator, engine and drive motor; The P1 planetary gear is provided with a ring gear, planetary gears and a sun gear; The engine is connected to the planetary gear and the sun gear respectively through splines; The input shaft and drive motor are splined to the ring gear.

[0013] It should be further explained that the number of teeth of the ring gear is 90 to 100, the number of teeth of the sun gear is 38 to 42, the number of teeth of the planet gear is 26 to 29, and the P1 planetary gear ratio coefficient K is 2.3 to 2.5; The motor speed control model is configured based on the motor speed, input shaft speed, engine speed, and P1 planetary gear ratio coefficient: Ns+K*Nr-(K+1)Npc=0.

[0014] According to another embodiment of the present application, an electronic device is provided, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the processor executes the program, the steps of the method for processing abnormal noise of a hybrid transmission under idle conditions are implemented.

[0015] According to another embodiment of the present application, a storage medium is further provided, on which a computer program is stored. When the computer program is executed by a processor, the steps of the method for processing abnormal noise of a hybrid transmission under idle conditions are implemented.

[0016] It can be seen from the above technical solutions that the present invention has the following advantages: In the method for handling abnormal noise of a hybrid transmission under idle conditions involved in this application, the host computer processes the received data in combination with the built-in motor speed control model. If it is determined that there is abnormal knocking noise in the hybrid transmission, the current input shaft speed is extracted from the data, and a control instruction is sent to the transmission controller to adjust the input shaft speed, adjust the speed information, and combine the motor speed control model to eliminate the abnormal noise state. When there is no abnormal knocking noise in the transmission after adjustment, the host computer again calculates the most suitable motor speed at this time based on the motor speed control model, combined with the current engine speed and other parameters, and stores the motor speed information as the standard reference value under idle conditions for real-time control in subsequent operation, thereby ensuring that the hybrid transmission is in a stable, noise-free working state under idle conditions.

[0017] This application also involves that when the gearbox has no knocking noise after adjustment, the upper computer will calculate the most suitable motor speed at this time based on the motor speed control model, combined with the current engine speed, input shaft speed and P1 planetary gear ratio coefficient and other parameters, and store the motor speed information as the standard reference value under idle conditions for real-time control in subsequent operation. It can be seen that the system can ensure that the hybrid gearbox is in a stable and noise-free working state under idle conditions, improving the driving comfort and operation reliability of the vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solution of the present invention, the accompanying drawings required for use in the description will be briefly introduced below. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0019] Figure 1 It is a schematic diagram of the hybrid transmission abnormal noise processing system under idling conditions; Figure 2 It is a schematic diagram of an embodiment of a hybrid transmission abnormal noise processing system under idling conditions; Figure 3 This is an example diagram of the vehicle structure; Figure 4 This is a flow chart of a method for dealing with abnormal noise of a hybrid transmission under idling conditions; Figure 5 This is a schematic diagram for confirming abnormal speed; Figure 6 Schematic diagram of an electronic device. DETAILED DESCRIPTION

[0020] The method for handling abnormal noise of a hybrid transmission under idle conditions provided in the present application is to solve the problem that after the engine is started, the clutch produces abnormal noise due to large fluctuations in speed and torque under idle conditions of the engine.

[0021] The implementation method of this application is based on the fact that after the engine is started, the unloaded gears inside the hybrid transmission have abnormal knocking noises in a certain speed range under idle conditions, and the noise problem can be eliminated or reduced in certain speed ranges. Therefore, this application adjusts the motor speed to make the input shaft speed avoid the abnormal noise speed range, thereby achieving a method of eliminating or reducing the abnormal noise of the hybrid transmission under idle conditions.

[0022] The following will describe the hybrid transmission abnormal noise processing system under idle condition with a specific example. For the purpose of explanation rather than limitation, specific details such as specific system structure and technology are proposed to facilitate a thorough understanding of the embodiments of the present application. However, it should be clear to those skilled in the art that the present application can also be implemented in other embodiments without these specific details.

[0023] like Figure 1 and Figure 2 As shown, the system includes: a rotation speed sensor 1, a vibration acceleration sensor 2, a test terminal 3 and a host computer 4.

[0024] The speed sensor 1 of this embodiment is installed near the flywheel gear 5, and can collect the speed information of the engine. It should be noted that the flywheel gear 5 shows regular movement during the operation of the engine 6, and the speed sensor 1 can capture the speed change corresponding to the rotation of the gear in real time. The test terminal 3 can obtain the speed information of the engine 6 through the speed sensor 1.

[0025] The vibration acceleration sensor 2 is attached to the housing surface of the hybrid gearbox 7 to capture the knocking noise information generated during the operation of the hybrid gearbox 7. Since the abnormal operation and poor meshing of the internal components of the hybrid gearbox 7 will generate vibration of the housing, the vibration acceleration sensor 2 can collect the vibration information and convert it into an electrical signal, and the test terminal 3 can obtain the electrical signal through the vibration acceleration sensor 2.

[0026] The test terminal 3 is respectively connected to the speed sensor 1 and the vibration acceleration sensor 2 to receive the engine speed information and abnormal sound information in real time; the test terminal 3 also communicates with the transmission controller to obtain the input shaft speed information. The acquired data is combined and stored. The test terminal 3 can be set in the test area and can display the acquired data to the user. The acquired data and the stored historical data can also be uploaded to the host computer 4, so that the host computer 4 can obtain the hybrid transmission operation status data in real time.

[0027] Optionally, the test terminal 3 is communicatively connected with the rotation speed sensor 1 , the vibration acceleration sensor 2 and the transmission controller respectively through a CAN bus.

[0028] The host computer 4 has a data analysis algorithm. Optionally, a motor speed control model is built into the host computer 4. After receiving knocking noise information, engine speed information and input shaft speed information from the test terminal 3, the host computer 4 performs analysis based on the motor speed control model.

[0029] Based on the above method, the vehicle status is monitored in real time when the vehicle is idling. The speed sensor 1 continuously captures the speed change of the engine flywheel, converts it into a digital signal and transmits it to the test terminal 3; at the same time, the vibration acceleration sensor 2 senses the vibration of the gearbox housing. Once abnormal vibration is detected, it is determined that there may be abnormal knocking noise, and the corresponding signal is sent to the test terminal 3.

[0030] The test terminal 3 collects the engine speed information, the knocking abnormal sound information and the input shaft speed information obtained from the transmission controller, and uploads them to the host computer 4.

[0031] The host computer 4 processes the received data in combination with the built-in motor speed control model. If it is determined that the hybrid transmission has knocking noise, the current input shaft speed is extracted from the data, and a control instruction is sent to the transmission controller to adjust the input shaft speed, adjust the speed information, and combine the motor speed control model to eliminate the abnormal noise. When the transmission has no knocking noise after adjustment, the host computer 4 again calculates the most suitable motor speed at this time based on the motor speed control model and the current engine speed and other parameters, and stores the motor speed information as the standard reference value under the idle condition for real-time control in the subsequent operation process, thereby ensuring that the hybrid transmission is in a stable working state without abnormal noise under the idle condition.

[0032] Combination Figure 3 As shown, in some specific embodiments, in order to solve the abnormal noise problem of the hybrid transmission under idle conditions, the system realizes real-time monitoring and effective processing of the abnormal noise through the collaborative work of multiple components and precise information interaction between the host computer 4 and the transmission controller, ensuring that the hybrid transmission can run smoothly at idle and minimizing the interference of abnormal noise.

[0033] The system also includes: a P1 planetary gear, a generator 8, an engine 6 and a drive motor 9.

[0034] The P1 planetary gear is provided with a ring gear, a planetary gear and a sun gear. The engine is connected to the planetary gear and the sun gear respectively through splines, and the input shaft and the drive motor 9 are connected to the ring gear through splines.

[0035] The generator 8 of this embodiment can convert part of the mechanical energy output by the engine into electrical energy, and the engine provides power output for the vehicle. Through the connection with the P1 planetary gear, the power of the engine can be reasonably distributed to different components. The drive motor 9 provides electric drive for the vehicle through the connection with the P1 planetary gear ring.

[0036] The connection method in this embodiment enables the P1 planetary gear to play a role in power distribution and speed regulation in the hybrid system. The number of teeth of the ring gear is 90 to 100, the number of teeth of the sun gear is 38 to 42, the number of teeth of the planetary gear is 26 to 29, and the speed ratio coefficient K of the P1 planetary gear is 2.3 to 2.5. These parameters are used to define the transmission characteristics and power distribution ratio of the P1 planetary gear.

[0037] In this embodiment, the number of teeth of the ring gear, sun gear and planet gear of the P1 planet gear and the speed ratio coefficient K are set within a reasonable range, so that more accurate power distribution and speed regulation can be achieved under idling conditions. Compared with the prior art, the relevant scheme cannot be fine-tuned according to different working conditions. In this embodiment, by setting the number of teeth of the ring, the number of teeth of the sun gear, the number of teeth of the planet gear, and the speed ratio coefficient of the P1 planet gear, the power of the engine and the drive motor 9 can be transmitted to the input shaft at a more optimized ratio. For example, at idle speed, according to the engine speed and motor speed requirements, the precise speed ratio relationship is used to reasonably distribute power to avoid gear impact and abnormal noise caused by uneven power distribution.

[0038] The number of teeth of the ring gear, sun gear and planetary gear of this embodiment is within a specific range, which can optimize the meshing characteristics of the gears. Compared with the unreasonable number of teeth that may exist in the prior art, the gears generate a large impact force at the moment of meshing, which in turn causes abnormal noise. In this embodiment, through the reasonable selection of the number of teeth, the gears are more stable during the meshing process and the impact force is significantly reduced. For example, when the number of teeth of the ring gear is 90-100, the number of teeth of the sun gear is 38-42, and the number of teeth of the planetary gear is 26-29, the module and tooth shape design of the gears can be better matched, reducing tooth surface friction and impact, thereby reducing the possibility of abnormal noise.

[0039] The speed ratio coefficient K of the P1 planetary gear is in the range of 2.3-2.5, which provides a more stable operating characteristic for the system under idle conditions. Due to the limitation of the speed ratio coefficient, the prior art is difficult to adapt to the slight fluctuation of the engine and motor speed under idle conditions, which easily causes system resonance and abnormal noise. The speed ratio coefficient of this embodiment can ensure the speed stability of each component of the planetary gear under different combinations of engine and motor speeds, and reduce abnormal vibration and abnormal noise caused by speed fluctuations.

[0040] It can be seen that when calculating the motor speed, the model is based on the speed relationship between the sun gear, ring gear and planetary carrier, combined with the speed ratio coefficient K, which can more accurately match the speed of the engine and motor, avoid improper motor speed adjustment due to inaccurate model, and thus reduce abnormal noise caused by mismatch between the motor and the gearbox.

[0041] An optional setting method is shown in the following table:

[0042] As an implementation of this embodiment, the host computer performs a comprehensive analysis based on the received data in combination with the built-in motor speed control model. The motor speed control model is configured based on the motor speed, input shaft speed, engine speed and P1 planetary gear ratio coefficient: Ns + K * Nr - (K + 1) Npc = 0.

[0043] Among them, Ns represents the sun gear speed, which matches the engine speed. Nr represents the ring gear speed, which matches the input shaft speed and the drive motor speed. Npc represents the planet carrier speed.

[0044] When the host computer determines that there is knocking noise in the hybrid transmission, it extracts the current input shaft speed from the data and sends a control instruction to the transmission controller. By adjusting the input shaft speed, the speed relationship of each component of the P1 planetary gearbox is changed, thereby trying to eliminate the abnormal noise.

[0045] When the gearbox has no knocking noise after adjustment, the host computer calculates the most suitable motor speed at this time based on the motor speed control model, combined with the current engine speed, input shaft speed, P1 planetary gear ratio coefficient and other parameters, and stores the motor speed information as the standard reference value under idle conditions for real-time control in subsequent operation. It can be seen that the system can ensure that the hybrid gearbox is in a stable and noise-free working state under idle conditions, improving the vehicle's driving comfort and operating reliability.

[0046] The following will further describe the above-mentioned hybrid transmission abnormal noise processing system under idle conditions in the embodiment of the present invention in conjunction with the accompanying drawings in the embodiment of the present invention, and will expand the description in the form of a hybrid transmission abnormal noise processing method under idle conditions. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments.

[0047] See also Figure 4 The figure is a flow chart of a method for processing abnormal noise of a hybrid transmission under idle conditions in a specific embodiment, and the method includes: S101: Detect knocking noise information and engine speed information of the hybrid transmission respectively, and read the speed information of the input shaft of the hybrid transmission.

[0048] In this embodiment, the speed sensor and the vibration acceleration sensor collect signals at the same time. The vibration acceleration sensor can measure the knocking noise signal, the speed sensor can measure the engine speed signal, and the transmission CAN signal can read the transmission input shaft speed signal, so the corresponding knocking noise speed range can be obtained.

[0049] S102: configuring a motor speed control model based on the motor speed, the input shaft speed, the engine speed, and the P1 planetary gear ratio coefficient.

[0050] Specifically, the motor speed control model is configured based on the motor speed, input shaft speed, engine speed, and P1 planetary gear ratio coefficient: Ns+K*Nr-(K+1)Npc=0; where Ns is the motor speed, Nr is the input shaft speed, Npc is the engine speed, and K is the P1 planetary gear ratio coefficient.

[0051] S103: When there is an abnormal knocking noise in the hybrid transmission, the input shaft speed is obtained.

[0052] like Figure 5 As shown, the vibration acceleration sensor is used to test the speed ranges where the transmission has abnormal knocking noises, and then the speed range can be calculated and matched.

[0053] S104: Adjust the input shaft speed, and when there is no knocking noise in the hybrid transmission, calculate the motor speed at this time based on the motor speed control model, and use it as the motor speed information under idle condition.

[0054] In some specific embodiments, it is assumed that when the input shaft speed is measured to have abnormal knocking noise at a certain speed value or interval, there is no abnormal knocking noise after it is greater than a certain input shaft speed or range. Specifically, the motor speed Ns can be calculated by Ns+K*Nr-(K+1)Npc=0. With the engine speed Npc fixed, the knocking noise of the hybrid transmission can be avoided by increasing the input shaft speed Nr and reducing Ns. Therefore, in order to avoid abnormal knocking noise, the motor speed is reduced to below the speed when there is no abnormal knocking noise in the hybrid transmission.

[0055] This embodiment also verifies the relevant data. Specifically, when there is no knocking noise in the hybrid transmission, the motor speed at this time is calculated based on the motor speed control model, and the motor speed is also calculated. After the motor executes the motor speed, the hybrid transmission noise test verification under idle condition is performed; When there is no knocking noise in the hybrid transmission, the motor speed information is defined as the motor speed information under idle condition.

[0056] In some specific embodiments, two methods are used for verification, one of which is based on time domain analysis method analysis verification.

[0057] Specifically, after the motor performs speed avoidance, the vehicle is started and placed in an idling condition.

[0058] The engine and the motor are configured to operate according to the adjusted motor speed information.

[0059] Collect the vibration acceleration signal of the hybrid transmission within a preset time period.

[0060] The collected vibration acceleration signal is analyzed based on the time domain analysis method, and the time domain signal is converted into a frequency domain signal through fast Fourier transform to analyze the frequency signal of the vibration.

[0061] When the characteristic frequency signal within the abnormal noise speed range disappears, or is lower than the preset frequency, it is defined as a hybrid transmission with no knocking noise.

[0062] Another method is to make a judgment based on the sound signal, start the vehicle after the motor performs speed avoidance, and put the vehicle in an idle condition.

[0063] The engine and the motor are configured to operate according to the adjusted motor speed information.

[0064] Collect the sound signals of the hybrid transmission within a preset time period.

[0065] The collected sound signal is analyzed based on the sound pressure level analysis to analyze the sound pressure levels at different frequencies.

[0066] If the sound pressure level of the frequency component related to the abnormal sound is lower than the sound pressure level based on the standard, it is defined as a hybrid transmission without knocking abnormal sound.

[0067] In some embodiments, the vibration acceleration signal of the hybrid transmission within a preset time period is collected, and the time domain analysis method is used, and then combined with the fast Fourier transform to convert it into a frequency domain signal, the vibration frequency signal can be analyzed. It is determined whether the characteristic frequency signal within the speed range of the hybrid transmission abnormal sound disappears or is lower than the preset frequency. It can more accurately determine whether the transmission still has abnormal knocking noise.

[0068] This embodiment also analyzes the collected sound signals based on sound pressure level analysis, and can verify the abnormal sound processing effect in multiple ways. The sound pressure levels at different frequencies are analyzed, and the sound pressure levels of the frequency components related to the abnormal sound are compared with the reference sound pressure level. Moreover, the sound signal reflects the noise generated when the gearbox is running. Through the sound pressure level analysis, the accuracy of verification is improved.

[0069] After the motor performs speed avoidance, this embodiment starts the vehicle and puts it in an idling state, and then starts collecting vibration acceleration signals and sound signals. This realizes real-time monitoring of the gearbox operating state and can capture any possible abnormal sound changes in a timely manner. If an abnormality is found, measures can be taken to meet the use requirements.

[0070] It should be understood that the order of execution of the steps in the above embodiment does not necessarily mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiment of the present invention.

[0071] like Figure 6As shown, the present application also provides an electronic device, including a display module 103, a memory 102, a processor 101, and a computer program stored in the memory and executable on the processor 101. When the processor 101 executes the program, a method for processing abnormal noise of a hybrid transmission under idle conditions is implemented.

[0072] In the embodiment of the present invention, the electronic device may be the host computer or test terminal mentioned above. The electronic device includes but is not limited to a laptop computer, a desktop computer, a workbench, a personal digital assistant, a server, a blade server, a mainframe computer, and other suitable computers. The components shown herein, their connections and relationships, and their functions are merely examples and are not intended to limit the implementation of the embodiments of the present application described and / or required herein.

[0073] In the embodiment of the present application, the processor 101 can be implemented by using at least one of an application-specific integrated circuit (ASIC), a programmable logic device (PLD), a field programmable gate array (FPGA), a processor, a controller, a microcontroller, a microprocessor, and an electronic unit designed to perform the functions described herein. In some cases, such an implementation can be implemented in a controller. For software implementation, implementations such as processes or functions can be implemented with separate software modules that allow execution of at least one function or operation. The software code can be implemented by a software application (or program) written in any appropriate programming language, and the software code can be stored in a memory and executed by a controller.

[0074] The display module 103 is used to display information input by the user or information provided to the user. The display module 103 may include a display panel, which may be configured in the form of a liquid crystal display (LCD), an organic light-emitting diode (OLED), etc.

[0075] The memory 102 may be used to store software programs and various data. The memory 102 may include a high-speed random access memory and may also include a non-volatile memory, such as at least one disk storage device, a flash memory device, or other volatile solid-state storage devices.

[0076] The present application also provides a storage medium having a computer program stored thereon, and when the computer program is executed by a processor, the steps of the method for handling abnormal noise of a hybrid transmission under idle conditions are implemented.

[0077] Exemplarily, the storage medium may store a motor speed control model configured based on motor speed, input shaft speed, engine speed, and P1 planetary gear ratio coefficient; the motor speed control model is expressed as: Ns+K*Nr-(K+1)Npc=0.

[0078] The storage medium can adopt any combination of one or more readable media. The readable medium can be a readable signal medium or a readable storage medium. The readable storage medium can be, for example, but not limited to, a system, device or device of electricity, magnetism, light, electromagnetic, infrared, or semiconductor, or any combination of the above. More specific examples (non-exhaustive list) of readable storage media include: an electrical connection with one or more wires, a portable disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the above.

[0079] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A method for processing abnormal noise of a hybrid transmission under idling conditions, characterized in that: Methods include: Detect the knocking and abnormal noise information of the hybrid transmission and the engine speed information respectively, and read the input shaft speed information of the hybrid transmission; Configure the motor speed control model based on motor speed, input shaft speed, engine speed, and P1 planetary gear ratio coefficient; When there is knocking noise in the hybrid transmission, obtain the input shaft speed; Adjust the input shaft speed, and when there is no knocking noise in the hybrid transmission, calculate the motor speed at this time based on the motor speed control model, and use it as the motor speed information under idle conditions.

2. The method for processing abnormal noise of a hybrid transmission under idle conditions according to claim 1, characterized in that: The motor speed control model is configured based on the motor speed, input shaft speed, engine speed, and P1 planetary gear ratio coefficient: Ns+K*Nr-(K+1)Npc=0; Among them, Ns is the motor speed, Nr is the input shaft speed, Npc is the engine speed, and K is the P1 planetary gear ratio coefficient.

3. The method for processing abnormal noise of a hybrid transmission under idle conditions according to claim 1, characterized in that: The step of calculating the motor speed at this time based on the motor speed control model when there is no knocking abnormal sound in the hybrid transmission also includes: after the motor executes the motor speed, performing a hybrid transmission abnormal sound test verification under idle conditions; When there is no knocking noise in the hybrid transmission, the motor speed information is defined as the motor speed information under idle condition.

4. The method for processing abnormal noise of a hybrid transmission under idle condition according to claim 3, characterized in that: The method further includes: after the motor performs speed avoidance, starting the vehicle to place the vehicle in an idle state; Configure the engine and motor to run according to the adjusted motor speed information; Collecting vibration acceleration signals of the hybrid transmission within a preset time period; The collected vibration acceleration signal is analyzed based on the time domain analysis method, and the time domain signal is converted into a frequency domain signal through fast Fourier transform to analyze the frequency signal of the vibration; When the characteristic frequency signal within the abnormal noise speed range disappears, or is lower than the preset frequency, it is defined as a hybrid transmission with no knocking noise.

5. The method for processing abnormal noise of a hybrid transmission under idle condition according to claim 4, characterized in that: In the method, after the motor performs speed avoidance, the vehicle is started to be in an idling condition; Configure the engine and motor to run according to the adjusted motor speed information; Collecting sound signals of the hybrid transmission within a preset time period; Analyze the collected sound signals based on sound pressure level analysis and analyze the sound pressure levels at different frequencies; If the sound pressure level of the frequency component related to the abnormal sound is lower than the sound pressure level based on the standard, it is defined as a hybrid transmission without knocking abnormal sound.

6. A hybrid transmission abnormal noise processing system under idling conditions, characterized in that: The system is used to implement the method for processing abnormal noise of a hybrid transmission under idle conditions as described in any one of claims 1 to 5; The system includes: speed sensor, vibration acceleration sensor, test terminal and host computer; The speed sensor is installed close to the flywheel teeth; The vibration acceleration sensor is attached to the housing surface of the hybrid gearbox; The test terminal is respectively connected to the speed sensor, the vibration acceleration sensor and the transmission controller to obtain engine speed information, knocking noise information and input shaft speed information; The test terminal transmits the engine speed information, knocking noise information and input shaft speed information to the host computer through communication connection with the host computer; The host computer obtains the input shaft speed based on the knocking noise information, engine speed information and input shaft speed information, combined with the motor speed control model; when there is knocking noise in the hybrid transmission, the input shaft speed is obtained; The host computer sends a control command to the transmission controller to adjust the input shaft speed. When there is no knocking or abnormal noise in the hybrid transmission, the motor speed at this time is calculated based on the motor speed control model and used as the motor speed information under idle conditions.

7. The hybrid transmission abnormal noise processing system under idle condition according to claim 6, characterized in that: Also includes: P1 planetary gear, generator, engine and drive motor; The P1 planetary gear is provided with a ring gear, planetary gears and a sun gear; The engine is connected to the planetary gear and the sun gear respectively through splines; The input shaft and drive motor are splined to the ring gear.

8. The hybrid transmission abnormal noise processing system under idle condition according to claim 7, characterized in that: The number of teeth of the ring gear is 90 to 100, the number of teeth of the sun gear is 38 to 42, the number of teeth of the planet gear is 26 to 29, and the P1 planetary gear ratio coefficient K is 2.3 to 2.5; The motor speed control model is configured based on the motor speed, input shaft speed, engine speed, and P1 planetary gear ratio coefficient: Ns+K*Nr-(K+1)Npc=0.

9. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein: When the processor executes the program, the steps of the method for processing abnormal noise of a hybrid transmission under idle conditions as described in any one of claims 1 to 5 are implemented.

10. A storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by the processor, the steps of the method for processing abnormal noise of a hybrid transmission under idle conditions as claimed in any one of claims 1 to 5 are implemented.

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