Method and apparatus for controlling noise of vehicle, device, and storage medium

Abstract

A method for controlling noise of a vehicle, comprising: when a state of charge of a battery is greater than a preset state of charge, acquiring a vehicle speed, a gear position, an electronic handbrake state, and an automatic parking state of a current vehicle; on the basis of the vehicle speed, the gear position, the electronic handbrake state, and the automatic parking state, determining whether to activate a noise control mode of the vehicle; when activating the noise control mode, on the basis of the vehicle speed, obtaining a first engine power of the vehicle; and, on the basis of the first engine power, controlling noise of the vehicle. The present invention also relates to an apparatus for controlling noise of a vehicle, a device for generation of noise control, and a storage medium.

Description

Vehicle noise control methods, devices, equipment and storage media

[0001] Related applications

[0002] This application claims priority to Chinese patent application No. 202410951388.7, filed on July 16, 2024, the entire contents of which are incorporated herein by reference. Technical Field

[0003] This application relates to the technical field of vehicle noise, and more particularly to a vehicle noise control method, apparatus, device, and storage medium. Background Technology

[0004] In multi-gear hybrid vehicles, due to the structural characteristics of the multi-gearbox, when a certain gear is engaged, the gears in other gears are non-load-bearing gears. Furthermore, hybrid vehicles have multiple power sources; in addition to the engine, there are generators and drive motors that can provide power. With these power sources coupled, the torque distribution between them exacerbates gear transmission backlash and knocking, as well as knocking noise from non-load-bearing gears. For example, in power-split mode and parallel direct drive mode, when the engine is coupled to the wheel end, if the P3 drive motor passes near zero torque and the engine torque exceeds a certain level, it can easily generate knocking noise from loose gears.

[0005] Therefore, how to suppress abnormal noise from the empty gear teeth of a vehicle is a problem that urgently needs to be solved. Summary of the Invention

[0006] The main purpose of this application is to provide a vehicle noise control method, device, equipment and storage medium, which aims to solve the technical problem of abnormal noise from vehicle gear teeth.

[0007] To achieve the above objectives, this application proposes a vehicle noise control method, the method comprising:

[0008] When the battery's state of charge is greater than the preset state of charge, the vehicle's current speed, gear, electronic parking brake status, and auto hold status are obtained.

[0009] Determine whether the vehicle has activated the noise control mode based on the vehicle speed, the gear position, the electronic parking brake status, and the auto hold status.

[0010] When the noise control mode is activated, the first engine power of the vehicle is obtained based on the vehicle speed;

[0011] Vehicle noise is controlled based on the power of the first engine.

[0012] In one embodiment, before obtaining the first engine power of the vehicle based on the vehicle speed when activating the noise control mode, the method further includes:

[0013] Get the slope of the road the vehicle is currently traveling on;

[0014] The braking pressure is obtained by looking up the correspondence table between vehicle speed, slope and braking pressure based on the vehicle speed and slope.

[0015] The drive motor torque is obtained based on the braking pressure.

[0016] The noise control mode is activated when the difference between the drive motor torque and zero torque is less than a preset torque.

[0017] In one embodiment, after determining whether the vehicle has activated the noise control mode based on the vehicle speed, the gear position, the electronic parking brake status, and the auto hold status, the method further includes:

[0018] When the noise control mode is not activated, obtain the relative battery state of charge and the power demand at the driving wheel end;

[0019] The second engine power is obtained based on the relative battery state of charge and the power demand at the driving wheel end;

[0020] Vehicle noise is controlled based on the power of the second engine.

[0021] In one embodiment, the step of obtaining the second engine power based on the relative battery state of charge and the power demand at the driving wheel ends includes:

[0022] Based on the relative battery state of charge and the required power at the driving wheels, look up the correspondence table between the battery state of charge, the required power at the driving wheels, and the engine power;

[0023] The corresponding second engine power is obtained based on the battery state of charge and the correspondence table between the power demand at the driving wheel end and the engine power.

[0024] In one embodiment, the step of obtaining the first engine power of the vehicle based on the vehicle speed includes:

[0025] Find the table showing the correspondence between vehicle speed and engine power based on the vehicle speed;

[0026] The corresponding first engine power is obtained according to the table of correspondence between vehicle speed and engine power.

[0027] In one embodiment, before acquiring the current vehicle speed, gear, electronic parking brake status, and auto hold status when the battery's state of charge is greater than a preset state of charge, the method further includes:

[0028] Obtain the current state of charge of the vehicle's battery;

[0029] When the state of charge of the battery is less than or equal to a preset state of charge, the vehicle is controlled to enter a forced charging mode.

[0030] In one embodiment, the step of controlling the vehicle to enter a forced charging mode when the battery's state of charge is less than or equal to a preset state of charge includes:

[0031] When the state of charge of the battery is less than or equal to a preset state of charge, the required power at the driving wheel end and the target power of the engine are obtained;

[0032] The forced charging power is obtained based on the power demand at the driving wheel end and the target power of the engine;

[0033] The vehicle is controlled to perform forced charging based on the forced charging power.

[0034] In one embodiment, the step of determining whether the vehicle has activated a noise control mode based on the vehicle speed, the gear position, the electronic parking brake status, and the automatic parking status includes:

[0035] When the vehicle speed is within a preset speed range, the gear is in automatic mode, the electronic parking brake is in the released state, and the automatic parking state is in the released state, the noise control mode is activated.

[0036] The noise control mode is not activated when at least one of the following conditions is met: the vehicle speed is not within the preset speed range, the gear is not in automatic mode, the electronic parking brake is in a locked state, or the automatic parking mode is in an active state.

[0037] In one embodiment, the step of controlling vehicle noise based on the first engine power includes:

[0038] The target torque is obtained by controlling the engine torque based on the power of the first engine;

[0039] Vehicle noise is controlled based on the target torque.

[0040] Furthermore, to achieve the above objectives, this application also proposes a vehicle noise control device, the device comprising:

[0041] The information acquisition module is used to acquire the current vehicle speed, gear, electronic parking brake status, and auto hold status when the battery's state of charge is greater than the preset state of charge.

[0042] The mode switching module is used to determine whether the vehicle has activated the noise control mode based on the vehicle speed, the gear position, the electronic parking brake status, and the automatic parking status.

[0043] The information processing module is used to obtain the first engine power of the vehicle based on the vehicle speed when the noise control mode is activated;

[0044] A noise control module is used to control vehicle noise based on the power of the first engine.

[0045] In addition, to achieve the above objectives, this application also proposes a vehicle noise control device, the device comprising: a memory, a processor, and a computer program stored in the memory and executable on the processor, the computer program being configured to implement the steps of the vehicle noise control method as described above.

[0046] In addition, to achieve the above objectives, this application also proposes a storage medium, which is a computer-readable storage medium, on which a computer program is stored, and which, when executed by a processor, implements the steps of the vehicle noise control method described above.

[0047] In addition, to achieve the above objectives, this application also provides a computer program product, which includes a computer program that, when executed by a processor, implements the steps of the vehicle noise control method described above.

[0048] This application provides a vehicle noise control method. When the battery's state of charge (SOC) is greater than a preset SOC, the method acquires the vehicle's current speed, gear position, electronic parking brake status, and auto-hold status. Based on these parameters, it determines whether a noise control mode is activated. If the noise control mode is activated, a first engine power is obtained based on the vehicle speed. Vehicle noise is then controlled based on this first engine power. In summary, this application solves the problem of abnormal noise from idling gears by analyzing vehicle data and switching to the optimal vehicle control mode based on the analysis results, thereby improving driving comfort. Attached Figure Description

[0049] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0050] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0051] Figure 1 is a flowchart of the first embodiment of the vehicle noise control method of this application;

[0052] Figure 2 is a schematic diagram of the engine power in a low-charge state provided in an embodiment of the vehicle noise control method of this application;

[0053] Figure 3 is a schematic diagram of the noise scene judgment of the empty tooth sleeve provided in an embodiment of the vehicle noise control method of this application;

[0054] Figure 4 is a schematic diagram of the noise torque boundary of the empty sleeve tooth provided in an embodiment of the vehicle noise control method of this application;

[0055] Figure 5 is a flowchart of the second embodiment of the vehicle noise control method of this application;

[0056] Figure 6 is a flowchart of the third embodiment of the vehicle noise control method of this application;

[0057] Figure 7 is a schematic diagram showing the relationship between braking pressure and torque provided in an embodiment of the vehicle noise control method of this application;

[0058] Figure 8 is a detailed flowchart of an embodiment of the vehicle noise control method of this application;

[0059] Figure 9 is a schematic diagram of the module structure of the vehicle noise control device according to an embodiment of this application;

[0060] Figure 10 is a schematic diagram of the equipment structure of the hardware operating environment involved in the vehicle noise control method in the embodiments of this application.

[0061] The purpose, features, and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Embodiments of the present invention

[0062] It should be understood that the specific embodiments described herein are merely illustrative of the technical solutions of this application and are not intended to limit this application.

[0063] To better understand the technical solution of this application, a detailed description will be provided below in conjunction with the accompanying drawings and specific implementation methods.

[0064] The main solution of this application embodiment is: when the battery's state of charge is greater than a preset state of charge, obtain the current vehicle speed, gear, electronic parking brake status, and automatic parking status; determine whether the vehicle has activated a noise control mode based on the vehicle speed, gear, electronic parking brake status, and automatic parking status; when the noise control mode is activated, obtain the vehicle's first engine power based on the vehicle speed; and control the vehicle noise based on the first engine power.

[0065] In multi-gear hybrid vehicles, due to the structural characteristics of the multi-gearbox, when a certain gear is engaged, the gears in other gears are non-load-bearing gears. Furthermore, hybrid vehicles have multiple power sources; in addition to the engine, there are generators and drive motors that can provide power. With these power sources coupled, the torque distribution between them exacerbates gear transmission backlash and knocking, as well as knocking noise from non-load-bearing gears. For example, in power-split mode and parallel direct drive mode, when the engine is coupled to the wheel end, if the P3 drive motor passes near zero torque and the engine torque exceeds a certain level, it can easily generate knocking noise from loose gears. Therefore, how to suppress abnormal knocking noise from loose gears is a problem that urgently needs to be solved.

[0066] This application solves the problem of abnormal noise from the vehicle's gear teeth by analyzing vehicle data and switching to the optimal vehicle control mode based on the analysis results, thereby improving the driving comfort of the vehicle.

[0067] The executing entity in this embodiment can be a vehicle noise control system, or a computing service device with data processing, network communication, and program execution functions, such as a tablet computer, personal computer, or mobile phone, or an electronic device capable of implementing the aforementioned vehicle noise control function. This embodiment is not specifically limited in this regard. The following uses a vehicle noise control system as an example to describe this embodiment and the following embodiments.

[0068] In addition, the execution scenario of this embodiment is mainly aimed at the problem of abnormal noise in hybrid vehicles when the engine torque exceeds the torque boundary of the idle gear during crawling or low-speed driving, while taking into account the charging performance of the vehicle in place and avoiding breakdown at extremely low SOC (State of charge).

[0069] Based on this, this application provides a vehicle noise control method. Referring to FIG1, FIG1 is a flowchart of the first embodiment of the vehicle noise control method of this application.

[0070] In this embodiment, the vehicle noise control method includes steps S10 to S40:

[0071] Step S10: When the battery's state of charge is greater than the preset state of charge, obtain the current vehicle speed, gear, electronic parking brake status, and auto hold status.

[0072] State of charge (SOC) refers to the ratio of a battery's remaining charge to its charge level when fully charged, usually expressed as a percentage. Preset SOC is a safety threshold pre-set within the system based on factors such as vehicle type, battery performance, and ambient temperature. When SOC falls below this threshold, the system prioritizes maintaining SOC to prevent the vehicle from breaking down due to low battery power.

[0073] In addition, during the actual execution process, the system will first detect the battery's SOC to ensure that it is within the preset safe range in order to perform subsequent noise control operations. Subsequently, the system will obtain the current vehicle speed, gear, EPB (Electrical Park Brake) status, and Auto Hold status. By collecting this information, the system can determine whether the vehicle needs to activate the noise control mode.

[0074] In one feasible implementation, prior to step S10, the method further includes:

[0075] Step S01: Obtain the current state of charge of the vehicle battery.

[0076] In this step, the system monitors the battery's state of charge in real time. By monitoring the battery's state in real time, the system can determine whether the vehicle needs to be forcibly charged, or under what conditions the empty tooth noise suppression control needs to be activated, thereby ensuring the vehicle's stability and performance under different operating conditions.

[0077] Step S02: When the state of charge of the battery is less than or equal to the preset state of charge, control the vehicle to enter the forced charging mode.

[0078] In this step, when the battery's state of charge (SOC) falls below a preset SOC threshold, the system will control the vehicle to enter forced charging mode to ensure the battery maintains sufficient charge and prevent the vehicle from breaking down due to low battery. For example, suppose the system detects that the battery's SOC has dropped to 15% (below the preset 20% threshold) while the vehicle is in motion. At this time, the system will automatically adjust the engine power distribution, providing additional power for battery charging while still meeting the vehicle's driving needs, until the battery's SOC recovers to a safe range.

[0079] Additionally, the preset state of charge (SOC) is a threshold set based on factors such as different vehicles and battery performance, used to determine whether the vehicle should enter forced charging mode. Forced charging mode refers to a working mode in which, when the system detects that the battery charge is low, it forcibly increases the battery charging power by adjusting engine power distribution and other methods.

[0080] In one implementation, step S02 specifically includes:

[0081] Step S021: When the state of charge of the battery is less than or equal to the preset state of charge, obtain the required power at the driving wheel end and the target power of the engine.

[0082] Forced charging power refers to the additional power allocated to the engine to meet the battery's charging needs. This power ensures the vehicle's normal operation and also helps to increase the battery's state of charge (SOC), preventing the vehicle from breaking down due to low SOC. Drive wheel power requirements refer to the power required by the vehicle to maintain its current driving state, including the power needed to overcome resistance, maintain speed, and provide acceleration.

[0083] Step S022: Obtain the forced charging power based on the required power at the driving wheel end and the target power of the engine.

[0084] Forced charging power refers to the additional power allocated to the engine to meet the battery's charging needs. After determining the power required at the driving wheels and the engine's target power, the system calculates the power needed for forced charging. If the engine's target power exceeds the power required at the driving wheels, the remaining power (i.e., forced charging power) can be used for charging.

[0085] Step S023: Control the vehicle to perform forced charging according to the forced charging power.

[0086] As shown in Figure 2, when the system detects that the battery's state of charge is lower than the preset state of charge, it issues a forced charging command. In addition to meeting the power requirements of the wheel ends, the engine also needs to increase the forced charging power to quickly replenish the battery's charge.

[0087] In this embodiment, activating the forced charging mode allows for rapid replenishment of the battery when its charge is low, ensuring normal vehicle operation and driving safety. Simultaneously, by optimizing engine power distribution, efficient energy recovery and battery charging can be achieved while maintaining vehicle power. This ensures vehicle stability and performance under various operating conditions.

[0088] Step S20: Determine whether the vehicle has activated the noise control mode based on the vehicle speed, gear position, electronic parking brake status, and automatic parking status.

[0089] As shown in Figure 3, in this step, the system determines whether the vehicle has entered noise control mode based on the various vehicle status information obtained in step S10 and in conjunction with preset activation conditions. These activation conditions include vehicle speed below a certain threshold (e.g., 30 kph), gear in D or a similar forward gear, and EPB and Auto Hold functions not being activated. For example, when the vehicle releases the brake from the parking state and enters the creep state, if the vehicle speed is below the preset threshold and the gear, EPB, and Auto Hold states meet the conditions, the system will automatically activate the noise control mode. Furthermore, the activation conditions for the noise control mode can be adjusted and optimized according to specific vehicle models; this embodiment does not impose any limitations on this.

[0090] In one embodiment, step S20 specifically includes:

[0091] Step S201: When the vehicle speed is within the preset speed range, the gear is in automatic mode, the electronic parking brake is in the released state, and the automatic parking state is in the released state, activate the noise control mode.

[0092] Gear refers to automatic transmission (D), reverse transmission (R), and parking transmission (P). The preset speed range covers most crawling and low-speed driving scenarios, preventing the noise control mode from being accidentally activated when the vehicle is traveling at high speeds. The electronic parking brake status and auto hold status are parameters reflecting whether the vehicle is stationary or in motion.

[0093] In addition, during this step, the system will detect the vehicle's speed, gear, electronic parking brake status, and auto hold status. The noise control mode will only be activated when the current vehicle speed is within the preset speed range (e.g., 0 to 30 kph), the gear is in automatic (D), the electronic parking brake is released, and the auto hold function is released.

[0094] This step ensures that the noise control mode is activated only when the vehicle is preparing to drive and at a low speed, thereby effectively avoiding the rattling noise of the gear teeth without affecting the normal use of the vehicle and improving the driving comfort.

[0095] Step S202: The noise control mode is not activated when at least one of the following conditions is met: the vehicle speed is not within the preset speed range, the gear is not in automatic mode, the electronic parking brake is in a locked state, or the automatic parking state is in an active state.

[0096] In this step, the system will detect the vehicle's speed, gear, electronic parking brake status, and auto hold status, and determine whether all data meet the preset conditions (such as vehicle speed exceeding 30 kph, gear being in P gear, electronic parking brake being locked, or auto hold being activated). If any of the above conditions are not met, the system will not activate the noise control mode.

[0097] In this embodiment, by judging vehicle operating data, it is ensured that the noise control mode is activated only when the vehicle is preparing to drive and the speed is low. This effectively avoids the abnormal noise of the gear teeth without affecting the normal use of the vehicle, and improves the driving comfort of the vehicle.

[0098] Step S30: When the noise control mode is activated, the first engine power of the vehicle is obtained based on the vehicle speed.

[0099] Noise control mode refers to a specific operating mode in the system designed to reduce or eliminate various noises generated during vehicle crawling and low-speed operation, especially noises related to the engine and transmission gears. This mode is activated when the vehicle meets preset activation conditions to provide a quieter and more comfortable driving environment. The first engine power refers to the power obtained by referring to the corresponding engine power table based on vehicle speed. This table was obtained through multiple tests and calibrations in real-world operating scenarios. Understandably, this is to find the optimal engine power value at different vehicle speeds to balance parking charging performance and noise control requirements.

[0100] In one embodiment, step S30 specifically includes:

[0101] Step S301: Look up the correspondence table between vehicle speed and engine power based on the vehicle speed.

[0102] In this step, the system first detects the current vehicle speed. Then, based on the detected speed value, the system looks up the value in a pre-set table of the correspondence between vehicle speed and engine power.

[0103] Step S302: Obtain the corresponding first engine power according to the correspondence table between vehicle speed and engine power.

[0104] The table showing the correspondence between vehicle speed and engine power is based on the characteristics of different vehicles and actual driving conditions. The vehicle speed values ​​(V1 to V5) and the corresponding engine power values ​​(Pice-1 to Pice-5) are optimal values ​​obtained through experimental testing and data analysis. These values ​​are chosen to ensure that at different vehicle speeds, the engine power meets the needs of normal vehicle operation while effectively preventing the occurrence of abnormal gear noise. Table 1 below shows the correspondence between vehicle speed and engine power.

[0105] Table 1

[0106] Vehicle speed V1 V2 V3 V4 V5 Engine power Pice-1 Pice-2 Pice-3 Pice-4 Pice-5

[0107] In this embodiment, by looking up the corresponding relationship table, the system can quickly and accurately obtain the first engine power that matches the current vehicle speed, and use this power as the reference value for subsequent engine power control. This allows the system to effectively avoid the occurrence of abnormal noise from the gear teeth while ensuring normal vehicle operation, thus improving the accuracy of vehicle noise control.

[0108] Step S40: Control vehicle noise based on the power of the first engine.

[0109] In this step, after the system receives the first engine power, it reduces the engine's output torque based on this power value, thereby avoiding abnormal noise from the idle gear. Specific control methods include adjusting the engine's ignition advance angle and fuel injection quantity, etc., which are not limited in this embodiment.

[0110] In one embodiment, step S40 specifically includes:

[0111] Step S401: Control the engine torque according to the power of the first engine to obtain the target torque.

[0112] The target torque refers to the engine torque obtained based on the relationship between torque and engine power. When the engine torque is too high and the engine speed is too low, the system will increase the engine speed and reduce the engine torque to keep the engine's target torque below the torque limit for abnormal gear noise.

[0113] Referring to Figure 4, ECVT (Continuously Variable Transmission) refers to a continuously variable transmission achieved through an integrated motor and planetary gear structure. The electric motor can couple the engine's power output and provide the electric motor's power output, achieving power splitting. By adjusting the engine speed and torque, it can achieve hybrid functions such as parking charging, pure electric, power split driving, and energy recovery.

[0114] Step S402: Control vehicle noise according to the target torque.

[0115] In this step, the system further controls vehicle noise based on the target torque. This control process is mainly achieved by adjusting the engine's operating state (such as speed and fuel injection quantity). Specifically, once the target engine torque is determined, the system adjusts the engine's operating parameters (such as speed) to keep the engine torque below the torque limit for abnormal gear noise. In other words, by precisely controlling the engine torque through the initial engine power to keep it below the torque limit for abnormal gear noise, the system suppresses vehicle noise generation, thus achieving effective management of vehicle noise.

[0116] This embodiment provides a vehicle noise control method. When the battery's state of charge (SOC) is greater than a preset SOC, the method acquires the vehicle's current speed, gear position, electronic parking brake status, and auto-hold status. Based on these parameters, it determines whether the vehicle has activated a noise control mode. If the noise control mode is activated, the method obtains the vehicle's first engine power based on the vehicle speed. The method then controls the vehicle noise based on this first engine power. In summary, this embodiment solves the problem of abnormal noise from idling gears by analyzing vehicle data and switching to the optimal vehicle control mode based on the analysis results, thereby improving driving comfort.

[0117] Based on the first embodiment of this application, in the second embodiment of this application, the content that is the same as or similar to that in the first embodiment described above can be referred to the above description and will not be repeated hereafter. Based on this, please refer to Figure 5, which is a flowchart illustrating the second embodiment of the vehicle noise control method of this application. After step S20, the method further includes:

[0118] Step S203: When the noise control mode is not activated, obtain the relative battery state of charge and the power demand at the driving wheel end.

[0119] The relative state of charge (SOC_diff) is the difference between the current battery charge and the target charge level, used for subsequent battery health management and charging strategy formulation. The power demand at the driving wheels (Preq) is a parameter reflecting the power requirements of the vehicle during current driving. In this step, when the vehicle is in a parked charging or low-speed creeping state, but the conditions for activating the idle gear noise suppression control mode have not been met, the system will monitor the battery SOC and the power demand at the driving wheels in real time.

[0120] Table 2

[0121]

[0122] As shown in Table 2, Table 2 shows the correspondence between the relative battery state of charge (SOC) and the power demand at the driving wheels and the engine power. For example, when charging while parked, the vehicle is not in a driving state, but the battery SOC may be low. In this case, the system will adjust the engine charging power according to SOC_diff and Preq (Preq is approximately 0 at this time) to ensure that the SOC does not continue to decrease.

[0123] Step S204: Obtain the second engine power based on the relative battery state of charge and the power demand at the driving wheel end.

[0124] The second engine power is determined by looking up a table based on the current relative battery state of charge (SOC_diff) and the power demand at the driving wheels. It reflects the engine's optimal output power under the current operating conditions. By rationally controlling the second engine power, energy conservation and emission reduction goals can be achieved while ensuring vehicle power performance. Specifically, when SOC_diff is low, it means the battery needs more charging power, and the system will increase the engine power to provide more charging power; while when Preq is high, it means the vehicle needs more power at the driving wheels, and the system will adjust the engine power to meet the power demand.

[0125] In one embodiment, step S204 specifically includes:

[0126] Step A10: Based on the relative battery state of charge and the required power at the driving wheel end, look up the correspondence table between the battery state of charge, the required power at the driving wheel end, and the engine power.

[0127] In this step, the system first identifies the vehicle's current battery state of charge (SOC_diff). At the same time, the vehicle control system also monitors the power demand at the driving wheels (Preq) in real time. Then, the system refers to a pre-set correspondence table, which details how to determine the engine power (Pice) under different battery state of charge (SOC_diff) and driving wheel power demand (Preq).

[0128] Step A20: Obtain the corresponding second engine power according to the battery state of charge and the correspondence table between the power demand at the driving wheel end and the engine power.

[0129] In this step, as shown in Table 2 above, which represents the correspondence between battery state of charge, required power at the driving wheels, and engine power, the system will derive a second engine power based on this table. It is understood that this table is based on the vehicle's actual performance parameters and test data. It ensures that, under different operating conditions, the engine power setting meets both noise suppression requirements and battery protection and charging needs.

[0130] Step S205: Control vehicle noise based on the power of the second engine.

[0131] After obtaining the second engine power, the system will control the engine's operating state based on this power value, thereby controlling the vehicle's noise level. Specifically, when the P3 drive torque crosses zero torque, the system will control the engine power according to conventional power control, determining the engine power based on the relative SOC_diff and the power demand at the driving wheel end, to avoid the engine torque exceeding the torque boundary of the idle gear noise, thereby reducing the generation of idle gear noise.

[0132] In this embodiment, when the noise control mode is not activated, the engine power is controlled by conventional power control. The engine power is determined based on the relative state of battery charge and the power demand at the driving wheel end to avoid the engine torque exceeding the torque boundary of the gear toothing noise, thereby reducing the generation of gear toothing noise. This improves the driving comfort of the vehicle while ensuring the battery charging needs.

[0133] Based on the first and second embodiments of this application, in the third embodiment of this application, the content that is the same as or similar to the first and second embodiments described above can be referred to the above description and will not be repeated hereafter. Based on this, please refer to Figure 6, which is a flowchart illustrating the third embodiment of the vehicle noise control method of this application. Before step S30, the method further includes:

[0134] Step B10: Obtain the slope of the road the vehicle is currently traveling on.

[0135] In this step, the system acquires the gradient of the road the vehicle is currently traveling on using onboard sensors. These sensors include accelerometers, gyroscopes, or other sensors capable of detecting changes in road conditions; this embodiment is not limited to these. As the vehicle travels on roads with varying gradients, the sensors detect and calculate the current gradient information in real time.

[0136] Additionally, it's important to note that gradient is a dynamic factor that changes depending on road conditions. Therefore, real-time gradient information is crucial for ensuring good vehicle performance and noise control under various road conditions. Understandably, this step aims to account for the impact of gradient on vehicle performance and noise when allocating engine power, especially during crawling and low-speed driving.

[0137] Step B20: Based on the vehicle speed and the slope, look up the correspondence table between vehicle speed, slope and braking pressure to obtain the braking pressure.

[0138] Braking pressure is a parameter that controls a vehicle's braking operation, directly affecting its braking performance and driving safety. The system can monitor and obtain the vehicle's braking pressure in real time through a brake pressure sensor.

[0139] In addition, in this step, the system will look up a pre-set table of correspondence between vehicle speed, gradient, and braking pressure. Because the creep torque is greater on slopes than on flat roads, the moment the drive motor (P3) crosses zero torque will differ from that on flat roads. The braking pressure at the critical point of crossing zero torque increases with the gradient (as shown in Table 3). This table was obtained through real-vehicle testing and calibration; the corresponding data will vary for different vehicles under different operating conditions. It records the braking pressure values ​​that the vehicle needs to apply at different vehicle speeds (V1 to V5) and gradients (0 to Slope3). By looking up this table, the system can quickly and accurately obtain the braking pressure required at the current vehicle speed and gradient.

[0140] Table 3

[0141]

[0142] Step B30: Obtain the drive motor torque based on the braking pressure.

[0143] Referring to Figure 7, in this step, the system calculates the torque value that the current drive motor (P3) needs to provide based on the relationship between braking pressure and drive motor torque. This torque value needs to ensure that the vehicle maintains a stable driving state during braking and avoid unnecessary vibrations or abnormal noises caused by the torque crossing zero torque during changes.

[0144] Step B40: When the difference between the drive motor torque and zero torque is less than a preset torque, activate the noise control mode.

[0145] The preset torque is a judgment threshold set in advance within the system. This threshold needs to be calibrated and adjusted according to the actual vehicle and engine performance characteristics to ensure its accuracy and effectiveness. In this step, the system monitors the difference between the drive motor torque and zero torque in real time. When this difference is less than the preset torque threshold within the system (i.e., the drive motor torque is about to cross the zero torque point), the system will determine it as a potential risk scenario of gear tooth noise and activate the noise control mode.

[0146] In this embodiment, by monitoring the road gradient during vehicle driving in real time, and obtaining the required braking pressure and torque of the current vehicle based on the correspondence table between vehicle speed, gradient and braking pressure, the noise control mode is activated when the torque approaches zero torque, which satisfies the stability of the vehicle's driving state during braking and avoids unnecessary vibration or abnormal noise caused by the torque crossing zero torque during the change process.

[0147] Referring to Figure 8, which is a schematic diagram of the overall flow of an embodiment of the vehicle noise control method of this application, the general execution flow is as follows: First, the current state of charge (SBC) of the vehicle battery is obtained. Second, when the SBC is less than or equal to a preset SBC, the vehicle is controlled to enter a forced charging mode. Third, when the SBC is greater than the preset SBC, the current vehicle speed, gear, electronic parking brake status, and auto hold status are obtained. Fourth, a noise control mode is activated when the vehicle speed is within a preset speed range, the gear is in automatic mode, the electronic parking brake is in a released state, and the auto hold status is in a released state. Fifth, the noise control mode is not activated when at least one of the following conditions is met: the vehicle speed is not within the preset speed range, the gear is not in automatic mode, the electronic parking brake is in a locked state, and the auto hold status is in an activated state. Sixth, the noise control mode is not activated when the noise control mode is not activated. Finally, the relative battery SBC and the required power at the driving wheels are obtained. A table showing the correspondence between the relative battery SBC and the required power at the driving wheels and the engine power is then consulted. The second engine power is obtained based on the correspondence table between the battery state of charge, the required power at the driving wheels, and the engine power; vehicle noise is controlled based on the second engine power. Then, the slope of the current road is obtained; the braking pressure is obtained by looking up the correspondence table between vehicle speed, slope, and braking pressure based on the vehicle speed and slope; the drive motor torque is obtained based on the braking pressure. When the difference between the drive motor torque and zero torque is less than a preset torque, the noise control mode is activated. When the noise control mode is activated, the correspondence table between vehicle speed and engine power is looked up based on the vehicle speed; the first engine power is obtained based on the correspondence table; vehicle noise is controlled based on the first engine power.

[0148] This application also provides a vehicle noise control device, as shown in Figure 9, the vehicle noise control device comprising:

[0149] The information acquisition module 10 is used to acquire the current vehicle speed, gear, electronic parking brake status and automatic parking status when the battery's state of charge is greater than the preset state of charge.

[0150] The mode conversion module 20 is used to determine whether the vehicle has activated the noise control mode based on the vehicle speed, the gear position, the electronic handbrake status, and the automatic parking status.

[0151] Information processing module 30 is used to obtain the first engine power of the vehicle based on the vehicle speed when the noise control mode is activated;

[0152] The noise control module 40 is used to control vehicle noise based on the power of the first engine.

[0153] The vehicle noise control device provided in this application, employing the vehicle noise control method described in the above embodiments, can solve the technical problem of abnormal noise from vehicle gear teeth. Compared with the prior art, the beneficial effects of the vehicle noise control device provided in this application are the same as those of the vehicle noise control method provided in the above embodiments, and other technical features in the vehicle noise control device are the same as those disclosed in the methods of the above embodiments, and will not be repeated here.

[0154] This application provides a vehicle noise control device, which includes: at least one processor; and a memory communicatively connected to the at least one processor; wherein the memory stores instructions executable by the at least one processor, which are executed by the at least one processor to enable the at least one processor to perform the vehicle noise control method in Embodiment 1 above.

[0155] Referring now to Figure 10, a schematic diagram of a vehicle noise control device suitable for implementing embodiments of this application is shown. The vehicle noise control device in embodiments of this application may include, but is not limited to, mobile terminals such as mobile phones, laptops, digital radio receivers, PDAs (Personal Digital Assistants), PADs (Portable Application Description), PMPs (Portable Media Players), in-vehicle terminals (e.g., in-vehicle navigation terminals), and fixed terminals such as digital TVs and desktop computers. The vehicle noise control device shown in Figure 10 is merely an example and should not impose any limitations on the functionality and scope of use of embodiments of this application.

[0156] As shown in Figure 10, the vehicle noise control device may include a processing unit 1001 (e.g., a central processing unit, a graphics processing unit, etc.), which can perform various appropriate actions and processes according to a program stored in a read-only memory (ROM) 1002 or a program loaded from a storage device 1003 into a random access memory (RAM) 1004. The RAM 1004 also stores various programs and data required for the operation of the vehicle noise control device. The processing unit 1001, ROM 1002, and RAM 1004 are interconnected via a bus 1005. An input / output (I / O) interface 1006 is also connected to the bus. Typically, the following systems can be connected to the I / O interface 1006: input devices 1007 including, for example, a touchscreen, touchpad, keyboard, mouse, image sensor, microphone, accelerometer, gyroscope, etc.; output devices 1008 including, for example, a liquid crystal display (LCD), speaker, vibrator, etc.; storage devices 1003 including, for example, magnetic tape, hard disk, etc.; and communication devices 1009. The communication device 1009 allows the vehicle noise control equipment to communicate wirelessly or wiredly with other devices to exchange data. Although the figures show vehicle noise control equipment with various systems, it should be understood that implementation or possession of all the systems shown is not required. More or fewer systems may be implemented alternatively.

[0157] According to the embodiments disclosed in this application, the processes described above with reference to the flowcharts can be implemented as computer software programs. For example, embodiments disclosed in this application include a computer program product comprising a computer program carried on a computer-readable medium, the computer program containing program code for performing the methods shown in the flowcharts. In such embodiments, the computer program can be downloaded and installed from a network via a communication device, or installed from storage device 1003, or installed from ROM 1002. When the computer program is executed by processing device 1001, it performs the functions defined in the methods of the embodiments disclosed in this application.

[0158] The vehicle noise control device provided in this application, employing the vehicle noise control method described in the above embodiments, can solve the technical problem of abnormal noise from vehicle gear teeth. Compared with the prior art, the beneficial effects of the vehicle noise control device provided in this application are the same as those of the vehicle noise control method provided in the above embodiments, and other technical features of this vehicle noise control device are the same as those disclosed in the previous embodiment method, and will not be repeated here.

[0159] The various parts disclosed in this application can be implemented using hardware, software, firmware, or a combination thereof. In the description of the above embodiments, specific features, structures, materials, or characteristics can be combined in any suitable manner in one or more embodiments or examples.

[0160] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

[0161] This application provides a computer-readable storage medium having computer-readable program instructions (i.e., a computer program) stored thereon, the computer-readable program instructions being used to execute the vehicle noise control method in the above embodiments.

[0162] The computer-readable storage medium provided in this application may be, for example, a USB flash drive, but is not limited to, electrical, magnetic, optical, electromagnetic, infrared, or semiconductor systems, devices, or any combination thereof. More specific examples of computer-readable storage media may include, but are not limited to: electrical connections having one or more wires, portable computer disks, hard disks, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fiber, portable compact disk read-only memory (CD-ROM), optical storage devices, magnetic storage devices, or any suitable combination thereof. In this embodiment, the computer-readable storage medium may be any tangible medium containing or storing a program that can be used by or in conjunction with an instruction execution system, system, or device. The program code contained on the computer-readable storage medium may be transmitted using any suitable medium, including but not limited to: wires, optical cables, RF (Radio Frequency), etc., or any suitable combination thereof.

[0163] The aforementioned computer-readable storage medium may be included in the vehicle noise control device; or it may exist independently and not be assembled into the vehicle noise control device.

[0164] The aforementioned computer-readable storage medium carries one or more programs that, when executed by a vehicle noise control device, cause the vehicle noise control device to: acquire the current vehicle speed, gear, electronic parking brake status, and auto hold status when the battery's state of charge is greater than a preset state of charge; determine whether the vehicle has activated a noise control mode based on the vehicle speed, gear, electronic parking brake status, and auto hold status; when the noise control mode is activated, obtain the vehicle's first engine power based on the vehicle speed; and control the vehicle noise based on the first engine power.

[0165] Computer program code for performing the operations of this application can be written in one or more programming languages ​​or a combination thereof, including object-oriented programming languages ​​such as Java, Smalltalk, and C++, and conventional procedural programming languages ​​such as the "C" language or similar programming languages. The program code can be executed entirely on the user's computer, partially on the user's computer, as a standalone software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In cases involving remote computers, the remote computer can be connected to the user's computer via any type of network—including a Local Area Network (LAN) or a Wide Area Network (WAN)—or can be connected to an external computer (e.g., via the Internet using an Internet service provider).

[0166] The flowcharts and block diagrams in the accompanying drawings illustrate the architecture, functionality, and operation of possible implementations of systems, methods, and computer program products according to various embodiments of this application. In this regard, each block in a flowchart or block diagram may represent a module, segment, or portion of code containing one or more executable instructions for implementing a specified logical function. In some alternative implementations, the functions indicated in the blocks may occur in a different order than those indicated in the drawings. For example, two consecutively indicated blocks may actually be executed substantially in parallel, and they may sometimes be executed in reverse order, depending on the functions involved. It should also be noted that each block in the block diagrams and / or flowcharts, and combinations of blocks in the block diagrams and / or flowcharts, may be implemented using a dedicated hardware-based system that performs the specified function or operation, or using a combination of dedicated hardware and computer instructions.

[0167] The modules described in the embodiments of this application can be implemented in software or hardware. The names of the modules do not necessarily limit the functionality of the unit itself.

[0168] The readable storage medium provided in this application is a computer-readable storage medium that stores computer-readable program instructions (i.e., a computer program) for executing the above-described vehicle noise control method, which can solve the technical problem of abnormal noise from vehicle gear teeth. Compared with the prior art, the beneficial effects of the computer-readable storage medium provided in this application are the same as the beneficial effects of the vehicle noise control method provided in the above embodiments, and will not be repeated here.

[0169] This application also provides a computer program product, including a computer program that, when executed by a processor, implements the steps of the vehicle noise control method described above.

[0170] The computer program product provided in this application can solve the technical problem of abnormal noise from vehicle gear teeth. Compared with the prior art, the beneficial effects of the computer program product provided in this application are the same as those of the vehicle noise control method provided in the above embodiments, and will not be repeated here.

[0171] The above description is only a part of the embodiments of this application and does not limit the patent scope of this application. All equivalent structural transformations made under the technical concept of this application and using the contents of the specification and drawings of this application, or direct / indirect applications in other related technical fields, are included in the patent protection scope of this application.

Claims

1. A vehicle noise control method, wherein, The method comprises: When the state of charge of the battery is greater than a preset state of charge, obtaining the vehicle speed, gear, electronic handbrake state and automatic parking state of the current vehicle; According to the vehicle speed, gear, electronic handbrake state and automatic parking state, it is judged whether the vehicle activates a noise control mode; When the noise control mode is activated, the first engine power of the vehicle is obtained according to the vehicle speed; According to the first engine power, the vehicle noise is controlled.

2. The method of claim 1, wherein, Before the step of obtaining the first engine power of the vehicle according to the vehicle speed when the noise control mode is activated, the method further comprises: Obtaining the slope of the current vehicle driving road; According to the vehicle speed and the slope, a corresponding relationship table of vehicle speed and slope and brake pressure is searched to obtain the brake pressure; According to the brake pressure, the drive motor torque is obtained; When the difference between the drive motor torque and zero torque is less than a preset torque, the noise control mode is activated.

3. The method of claim 1, wherein, After the step of judging whether the vehicle activates a noise control mode according to the vehicle speed, gear, electronic handbrake state and automatic parking state, the method further comprises: When the noise control mode is not activated, the relative battery state of charge and the driving wheel end demand power are obtained; According to the relative battery state of charge and the driving wheel end demand power, the second engine power is obtained; According to the second engine power, the vehicle noise is controlled.

4. The method of claim 3, wherein, The step of obtaining the second engine power according to the relative battery state of charge and the driving wheel end demand power comprises: According to the relative battery state of charge and the driving wheel end demand power, a corresponding relationship table of battery state of charge and driving wheel end demand power and engine power is searched; According to the corresponding relationship table of battery state of charge and driving wheel end demand power and engine power, the corresponding second engine power is obtained.

5. The method of claim 1, wherein, The step of obtaining the first engine power of the vehicle according to the vehicle speed comprises: According to the vehicle speed, a corresponding relationship table of vehicle speed and engine power is searched; According to the corresponding relationship table of vehicle speed and engine power, the corresponding first engine power is obtained.

6. The method of claim 1, wherein, Before the step of obtaining the vehicle speed, gear, electronic handbrake state and automatic parking state of the current vehicle when the state of charge of the battery is greater than a preset state of charge, the method further comprises: Obtaining the state of charge of the current vehicle battery; When the state of charge of the battery is less than or equal to a preset state of charge, the vehicle is controlled to enter a forced charging mode.

7. The method of claim 6, wherein, The step of controlling the vehicle to enter a forced charging mode when the state of charge of the battery is less than or equal to a preset state of charge comprises: When the state of charge of the battery is less than or equal to a preset state of charge, the driving wheel end demand power and the engine target power are obtained; According to the driving wheel end demand power and the engine target power, the forced charging power is obtained; According to the forced charging power, the vehicle is controlled to perform forced charging.

8. The method of any one of claims 1 to 7, wherein, The step of judging whether the vehicle activates a noise control mode according to the vehicle speed, gear, electronic handbrake state and automatic parking state comprises: activate the noise control mode when the vehicle speed is in the preset vehicle speed range, the gear is in the automatic gear, the electronic handbrake state is in the release state, and the automatic parking state is in the release state; deactivate the noise control mode when at least one of the following conditions is met: the vehicle speed is not in the preset vehicle speed range, the gear is not in the automatic gear, the electronic handbrake state is in the locking state, and the automatic parking state is in the activated state.

9. The method of any one of claims 1 to 7, wherein, The step of controlling the vehicle noise according to the first engine power comprises: controlling a torque of the engine according to the first engine power to obtain a target torque; controlling the vehicle noise according to the target torque.

10. A vehicle noise control device, wherein, The device comprises: an information acquisition module configured to acquire a vehicle speed, a gear, an electronic handbrake state, and an automatic parking state of a current vehicle when a state of charge of a battery is greater than a preset state of charge; a mode conversion module configured to determine whether the vehicle activates a noise control mode according to the vehicle speed, the gear, the electronic handbrake state, and the automatic parking state; an information processing module configured to obtain a first engine power of the vehicle according to the vehicle speed when the noise control mode is activated; a noise control module configured to control a vehicle noise according to the first engine power.

11. A noise control generation device, wherein, The device comprises a memory, a processor, and a computer program stored on the memory and executable on the processor, and the computer program is configured to implement the steps of the vehicle noise control method according to any one of claims 1 to 9.

12. A storage medium, wherein, The storage medium is a computer readable storage medium, and the storage medium stores a computer program, and the computer program is executed by the processor to implement the steps of the vehicle noise control method according to any one of claims 1 to 9.

Images