Vehicle noise optimization method, device, equipment and storage medium

Abstract

The present invention belongs to the technical field of hybrid electric vehicle NVH, and discloses a vehicle noise optimization method, device, equipment and storage medium. The present invention obtains an initial engine adjustment relationship table according to the engine fuel consumption and emission performance, and obtains the current vehicle operating condition and vehicle speed of the vehicle. When the vehicle speed is less than the noise adjustment speed threshold, the initial engine adjustment relationship table is searched according to the current vehicle operating condition and vehicle speed, and the target engine adjustment strategy corresponding to the current vehicle operating condition and vehicle speed is obtained. The target engine adjustment strategy includes a target engine speed adjustment strategy and a target engine speed increase rate adjustment strategy when the power generation power remains unchanged. The engine speed and speed increase rate are adjusted according to the target engine adjustment strategy, so that the engine speed is in the target power generation condition, and the noise of the vehicle is reduced. The present invention can reduce the engine noise during the acceleration of the vehicle in a more economical way on the basis of considering the charging efficiency of the vehicle.

Description

Technical Field

[0001] The present invention relates to the field of hybrid vehicle NVH technology, and in particular to a vehicle noise optimization method, device, equipment and storage medium. Background Art

[0002] Hybrid vehicles have a need to generate electricity when the battery is low. The vehicle's engine will drive the generator to generate electricity. In addition, when the vehicle is accelerating, the engine speed is relatively high, which will cause the engine noise in the car to be loud. In order to solve the noise problem during acceleration, the method usually adopted is to reduce the power generation during acceleration, and compensate for the vehicle's driving needs through active discharge of the battery pack, thereby reducing the engine speed and reducing vehicle noise. However, this method will reduce the charging efficiency of the vehicle and cannot quickly replenish the power.

[0003] The above contents are only used to assist in understanding the technical solution of the present invention and do not constitute an admission that the above contents are prior art. Summary of the invention

[0004] The main purpose of the present invention is to provide a vehicle noise optimization method, device, equipment and storage medium, aiming to solve the technical problem that the prior art cannot reduce the vehicle engine noise while ensuring normal charging during vehicle acceleration.

[0005] To achieve the above object, the present invention provides a vehicle noise optimization method, the method comprising the following steps:

[0006] Obtaining an engine operating condition adjustment relationship table according to the engine fuel consumption and emission performance;

[0007] Get the current vehicle operating condition and speed of the vehicle;

[0008] When the vehicle speed is less than the noise adjustment vehicle speed threshold, the engine operating condition adjustment relationship table is searched according to the current vehicle operating condition and the vehicle speed to obtain a target engine adjustment strategy corresponding to the current vehicle operating condition and the vehicle speed. Under the premise that the power generation power remains unchanged, the target engine adjustment strategy includes a target engine speed adjustment strategy and a target engine speed increase rate adjustment strategy;

[0009] The engine speed and speed increase rate are adjusted according to the target engine adjustment strategy, so that the engine speed is in the target generator working condition and the noise of the vehicle is reduced.

[0010] Optionally, when the vehicle speed is less than the noise adjustment vehicle speed threshold, before searching the engine operating condition adjustment relationship table according to the current vehicle operating condition and the vehicle speed, the method further includes:

[0011] Obtain the in-car noise at the right ear of the driver's seat, and extract the main order noise of the engine in the in-car noise as the control target;

[0012] Formulate a main-order noise target of the engine corresponding to each vehicle speed, and generate a target noise curve diagram based on the corresponding relationship between the main-order noise and the vehicle speed;

[0013] Acquiring the operating condition of the vehicle, the speed of the vehicle, and the noise of the vehicle;

[0014] Obtaining a target noise corresponding to the vehicle speed according to the vehicle speed and the target noise curve graph;

[0015] When the noise of the vehicle is greater than the target noise, the power generation is ensured to remain unchanged, the speed and speed increase rate of the engine of the vehicle are reduced, and an adjusted engine operating condition is obtained;

[0016] acquiring the noise of the vehicle again under the adjusted engine operating condition, and when the noise of the vehicle is not greater than the target noise, using the adjusted engine operating condition as the operating condition of the vehicle and the target engine adjustment strategy corresponding to the vehicle speed;

[0017] Repeat the steps of obtaining the operating condition of the vehicle, the speed of the vehicle and the noise of the vehicle until the operating condition of the vehicle and the speed of the vehicle obtain the target engine adjustment strategy, and generate an engine adjustment relationship table according to the operating condition of the vehicle, the speed of the vehicle and the target engine adjustment strategy corresponding to the operating condition of the vehicle and the speed.

[0018] Optionally, after obtaining the noise of the vehicle again under the adjusted engine operating condition, the method further includes:

[0019] When the noise of the vehicle is greater than the target noise, the steps of ensuring that the power generation power remains unchanged, reducing the speed and the speed increase rate of the engine of the vehicle, and obtaining the adjusted engine operating condition are repeated until the noise of the vehicle is no greater than the target noise, and the target engine adjustment strategy corresponding to the vehicle speed is obtained.

[0020] Optionally, when the noise of the vehicle is greater than the target noise, the generated power is ensured to remain unchanged, the speed and speed increase rate of the engine of the vehicle are reduced, and the adjusted engine operating condition is obtained, including:

[0021] The engine operating condition includes the engine speed and the engine speed increase rate;

[0022] When the noise of the vehicle is greater than the target noise, the engine speed and the speed increase rate are adjusted according to a preset adjustment range to obtain an adjusted engine operating condition, wherein the adjusted engine operating condition includes an adjusted engine speed and an adjusted engine speed increase rate.

[0023] Optionally, obtaining the operating condition of the vehicle includes:

[0024] Determining a vehicle electrical balancing strategy for the vehicle;

[0025] According to the vehicle electrical balancing strategy, the driving power requirement, accessory power requirement and supplementary power requirement of the vehicle under the vehicle electrical balancing strategy are obtained;

[0026] Obtaining the engine power demand according to the driving power demand, the accessory power demand and the supplementary power demand;

[0027] According to the power generation demand, combined with the engine fuel consumption and emission performance, the initial engine power generation conditions under various power generation are obtained;

[0028] An operating condition of the vehicle is determined based on the initial engine power generation operating condition.

[0029] Optionally, obtaining the driving power requirement of the vehicle under the whole vehicle electrical balancing strategy according to the whole vehicle electrical balancing strategy includes:

[0030] Determining a power generation mode of the vehicle engine according to the vehicle electrical balancing strategy;

[0031] The driving power requirement is obtained according to the throttle opening of the vehicle and the power generation mode of the vehicle engine.

[0032] Optionally, adjusting the engine speed and speed increase rate according to the target engine adjustment strategy so that the engine speed is at a target generator operating condition and the noise of the vehicle is reduced includes:

[0033] The current engine speed of the vehicle is adjusted according to the target engine speed rising rate until the noise of the vehicle is less than or equal to the current target noise, so that the engine speed is in the target generator working condition and the noise of the vehicle is reduced.

[0034] In addition, to achieve the above-mentioned purpose, the present invention also proposes a vehicle noise optimization device, the vehicle noise optimization device comprising:

[0035] The vehicle condition determination module 10 is used to obtain the current vehicle condition and vehicle speed of the vehicle;

[0036] A strategy determination module 20 is used to search the engine adjustment relationship table according to the current vehicle operating condition and the vehicle speed when the vehicle speed is less than the noise adjustment vehicle speed threshold, and obtain a target engine adjustment strategy corresponding to the current vehicle operating condition and the vehicle speed, wherein the target engine adjustment strategy includes a target engine speed adjustment strategy and a target engine speed increase rate adjustment strategy;

[0037] The noise optimization device 30 is used to adjust the engine speed and the speed increase rate according to the target engine adjustment strategy, so that the engine speed is in the target generator working condition and the noise of the vehicle is reduced.

[0038] In addition, to achieve the above-mentioned purpose, the present invention also proposes a vehicle noise optimization device, which includes: a memory, a processor, and a vehicle noise optimization program stored in the memory and executable on the processor, wherein the vehicle noise optimization program is configured to implement the steps of the vehicle noise optimization method described above.

[0039] In addition, to achieve the above-mentioned purpose, the present invention further proposes a storage medium, on which a vehicle noise optimization program is stored, and when the vehicle noise optimization program is executed by a processor, the steps of the vehicle noise optimization method described above are implemented.

[0040] The present invention obtains the current vehicle operating condition and vehicle speed of the vehicle, and when the vehicle speed is less than the noise adjustment speed threshold, searches the engine adjustment relationship table according to the current vehicle operating condition and the vehicle speed to obtain the target engine adjustment strategy corresponding to the current vehicle operating condition and the vehicle speed, wherein the target engine adjustment strategy includes a target engine speed adjustment strategy and a target engine speed increase rate adjustment strategy, and adjusts the engine speed and the speed increase rate according to the target engine adjustment strategy so that the engine speed is in the target generator operating condition, thereby reducing the noise of the vehicle. The present invention can reduce the engine noise during vehicle driving in a more economical way based on consideration of the vehicle NVH performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 It is a structural schematic diagram of a vehicle noise optimization device in a hardware operating environment involved in an embodiment of the present invention;

[0042] Figure 2 A schematic diagram of a flow chart of a first embodiment of a vehicle noise optimization method according to the present invention;

[0043] Figure 3 A noise target curve diagram of an embodiment of a vehicle noise optimization method of the present invention;

[0044] Figure 4It is an engine speed adjustment diagram during acceleration of an embodiment of a vehicle noise optimization method of the present invention;

[0045] Figure 5 A noise variation diagram during acceleration of an embodiment of a vehicle noise optimization method of the present invention;

[0046] Figure 6 A schematic diagram of a flow chart of a second embodiment of a vehicle noise optimization method according to the present invention;

[0047] Figure 7 A noise optimization flow chart of an embodiment of a vehicle noise optimization method of the present invention;

[0048] Figure 8 This is a structural block diagram of an embodiment of a vehicle noise optimization device of the present invention.

[0049] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0050] It should be understood that the specific embodiments described herein are only used to explain the present invention, and are not used to limit the present invention.

[0051] Reference Figure 1 , Figure 1 A schematic diagram of the structure of a vehicle noise optimization device in a hardware operating environment according to an embodiment of the present invention.

[0052] like Figure 1 As shown, the vehicle noise optimization device may include: a processor 1001, such as a central processing unit (CPU), a communication bus 1002, a user interface 1003, a network interface 1004, and a memory 1005. Among them, the communication bus 1002 is used to realize the connection and communication between these components. The user interface 1003 may include a display screen (Display), an input unit such as a keyboard (Keyboard), and the optional user interface 1003 may also include a standard wired interface and a wireless interface. The network interface 1004 may optionally include a standard wired interface and a wireless interface (such as a wireless fidelity (Wireless-Fidelity, Wi-Fi) interface). The memory 1005 may be a high-speed random access memory (Random Access Memory, RAM), or a stable non-volatile memory (Non-Volatile Memory, NVM), such as a disk storage. The memory 1005 may also be a storage device independent of the aforementioned processor 1001.

[0053] Those skilled in the art will understand that Figure 1The structure shown in the figure does not constitute a limitation on the vehicle noise optimization device, and may include more or less components than shown in the figure, or combine certain components, or arrange the components differently.

[0054] like Figure 1 As shown, the memory 1005 as a storage medium may include an operating system, a network communication module, a user interface module, and a vehicle noise optimization program.

[0055] exist Figure 1 In the vehicle noise optimization device shown, the network interface 1004 is mainly used for data communication with the network server; the user interface 1003 is mainly used for data interaction with the user; the processor 1001 and the memory 1005 in the vehicle noise optimization device of the present invention can be set in the vehicle noise optimization device, and the vehicle noise optimization device calls the vehicle noise optimization program stored in the memory 1005 through the processor 1001, and executes the vehicle noise optimization method provided by the embodiment of the present invention.

[0056] The embodiment of the present invention provides a vehicle noise optimization method, referring to Figure 2 , Figure 2 The figure is a flow chart of a first embodiment of a vehicle noise optimization method according to the present invention.

[0057] In this embodiment, the vehicle noise optimization method includes the following steps:

[0058] It should be noted that the executor of this embodiment is a vehicle noise optimization device, wherein the vehicle noise optimization device has functions such as data processing, data communication and program running. The vehicle noise optimization device can be an integrated controller, a control computer and other devices, and of course it can also be other devices with similar functions, and this embodiment does not limit this.

[0059] Step S10: obtaining an engine operating condition adjustment relationship table according to the engine fuel consumption and emission performance;

[0060] Step S20: Obtain the current vehicle operating condition and vehicle speed.

[0061] It is understandable that when optimizing the noise of a hybrid vehicle, it is necessary to obtain the vehicle speed obtained by the vehicle speed sensor and the current vehicle working condition through the vehicle's CAN bus. The vehicle's working condition can be divided into pure electric priority working condition, oil-electric hybrid working condition, and fuel priority working condition according to the working condition formulated by the vehicle's electric balance strategy. Since the working state of the engine is different at the same speed under different working conditions, it is necessary to first obtain the vehicle's current working condition and speed when optimizing the noise.

[0062] Step S30: When the vehicle speed is less than the noise adjustment speed threshold, the engine operating condition adjustment relationship table is searched according to the current vehicle operating condition and the vehicle speed to obtain the target engine adjustment strategy corresponding to the current vehicle operating condition and the vehicle speed, wherein the target engine adjustment strategy includes a target engine speed adjustment strategy and a target engine speed increase rate adjustment strategy.

[0063] It should be noted that the noise adjustment speed threshold refers to the maximum speed for optimizing vehicle noise. When the speed is greater than the noise adjustment speed threshold, the engine noise is not prominent due to the increase in other noises such as wind noise. Therefore, the vehicle speed is divided according to the noise adjustment speed threshold. The engine noise is only optimized when the vehicle speed is less than the noise adjustment speed threshold. When the vehicle speed is greater than the noise adjustment speed threshold, power generation is performed according to the power following measurement, and there is no need to specifically limit the engine speed.

[0064] In the specific implementation, the engine adjustment relationship table records the vehicle working condition, vehicle speed, and the adjustment strategy of the engine working condition under the current vehicle working condition and speed. For example, when the vehicle is in the oil-electric hybrid working condition and the vehicle speed is 50km / h, the corresponding adjustment step in the engine speed adjustment relationship is 25rpm. At this time, the engine speed can be adjusted according to the step of 25rpm, that is, for example, the current engine speed is 2600rpm, and the engine speed decreases by 25 revolutions each time the speed decreases. And the engine speed is adjusted according to the fixed engine rising rate.

[0065] Step S40: adjusting the engine speed and speed increase rate according to the target engine adjustment strategy, so that the engine speed is in the target generator operating condition and the noise of the vehicle is reduced.

[0066] It should be noted that the target power generation condition refers to an operating state in which the power generation power is at the rated power and the noise inside the vehicle is not greater than the noise target of the current vehicle speed.

[0067] In a specific implementation, the target engine adjustment strategy is obtained by searching the engine adjustment relationship table according to the current working conditions and the current vehicle speed. Since the vehicle's driving speed will not be reduced when the engine speed is adjusted, the target engine adjustment strategy can be executed all the time when the vehicle maintains a constant speed. When the engine speed is adjusted by the target engine adjustment strategy, the noise generated by the engine will continue to decrease as the engine speed decreases until the target noise value is reached, thereby achieving the purpose of reducing the noise inside the vehicle.

[0068] Further, the adjusting the engine speed and the speed increase rate according to the target engine adjustment strategy so that the engine speed is in a target generator operating condition and the noise of the vehicle is reduced includes:

[0069] The current engine speed of the vehicle is adjusted according to the target engine speed rising rate until the noise of the vehicle is less than or equal to the current target noise, so that the engine speed is in the target generator working condition and the noise of the vehicle is reduced.

[0070] In the specific implementation, when adjusting the vehicle engine speed, it is necessary to determine it according to the noise inside the vehicle and the current vehicle speed. When the vehicle speed is less than the noise adjustment speed threshold, the vehicle's current engine adjustment strategy is obtained in real time according to the current vehicle speed. When adjusting, it is also necessary to obtain the noise target corresponding to the current vehicle speed according to the vehicle speed. Figure 3 , Figure 3 is the noise target curve. There is a positive correlation between vehicle speed and noise target. At the same time, the noise target value of the vehicle speed before the point can be obtained according to the current real-time vehicle speed. Therefore, when the vehicle speed changes, it is necessary to compare the current in-vehicle noise with the current noise target. When the current in-vehicle noise does not exceed the target noise, there is no need to optimize the noise, and the vehicle can be kept running normally. When the in-vehicle noise is greater than the target noise, it is necessary to judge the current vehicle speed to determine whether it exceeds the noise adjustment speed threshold. When the vehicle speed is greater than the noise adjustment speed threshold, since the current wind noise and other noises are more prominent than the engine noise, the vehicle will be kept in a normal driving state and no noise optimization will be performed. When the vehicle speed is less than the noise adjustment speed threshold, it is necessary to obtain the noise adjustment strategy according to the current vehicle operating conditions and the current speed, obtain the engine speed increase rate, and adjust the engine speed according to the engine speed increase rate, so as to achieve the purpose of reducing vehicle noise. Reference Figure 4 Figure 5 , Figure 4 This is the engine speed adjustment diagram during acceleration, where the dark curve represents the engine speed before adjustment, and the light curve identifies the speed after adjustment. It can be found that when the vehicle speed is less than 70km / h, the adjusted engine speed is lower than that before adjustment. Figure 5 This is a graph of noise changes during acceleration. The dark curve represents the noise before adjustment, and the light curve identifies the noise after adjustment. Figure 4 Figure 5 It can be seen that the adjustment strategy of the present application can achieve the purpose of reducing vehicle noise by reducing the engine speed during the acceleration process.

[0071] This embodiment obtains the current vehicle operating condition and speed of the vehicle, and when the vehicle speed is less than the noise adjustment speed threshold, searches the engine adjustment relationship table according to the current vehicle operating condition and the vehicle speed to obtain the target engine adjustment strategy corresponding to the current vehicle operating condition and the vehicle speed. The target engine adjustment strategy includes a target engine speed adjustment strategy and a target engine speed increase rate adjustment strategy. The engine speed and the speed increase rate are adjusted according to the target engine adjustment strategy to make the engine speed in the target generator operating condition and reduce the noise of the vehicle. The present invention can reduce the engine noise during vehicle driving in a more economical way based on the consideration of the vehicle NVH performance.

[0072] refer to Figure 6 , Figure 6 It is a flow chart of a second embodiment of a vehicle noise optimization method of the present invention.

[0073] Based on the first embodiment, the vehicle noise optimization method of this embodiment further includes, before step S20:

[0074] Step S201: Acquire the in-vehicle noise at the right ear of the driver's seat of the vehicle, and extract the main order noise of the engine in the in-vehicle noise as the control target;

[0075] Step S202: Formulate the main order noise target of the engine corresponding to each vehicle speed, and generate a target noise curve diagram based on the correspondence between the main order noise and the vehicle speed;

[0076] Step S203: Acquire the working condition of the vehicle, the speed of the vehicle and the noise of the vehicle;

[0077] Step S304: obtaining a target noise corresponding to the vehicle speed according to the vehicle speed and the target noise curve graph;

[0078] Step S205: when the noise of the vehicle is greater than the target noise, the power generation is kept unchanged, the speed and speed increase rate of the engine of the vehicle are reduced, and an adjusted engine operating condition is obtained;

[0079] Step S206: acquiring the noise of the vehicle again under the adjusted engine operating condition, and when the noise of the vehicle is not greater than the target noise, using the adjusted engine operating condition as the operating condition of the vehicle and the target engine adjustment strategy corresponding to the vehicle speed;

[0080] Step S207: Repeat the steps of obtaining the operating condition of the vehicle, the speed of the vehicle and the noise of the vehicle until the operating condition of the vehicle and the speed of the vehicle obtain the target engine adjustment strategy, and generate an engine adjustment relationship table according to the operating condition of the vehicle, the speed of the vehicle and the target engine adjustment strategy corresponding to the operating condition of the vehicle and the speed.

[0081] In the specific implementation, before adjusting the vehicle engine speed, it is necessary to first obtain the engine operating condition adjustment relationship table based on the engine fuel consumption and emission performance, and the engine operating condition adjustment relationship table is generated by testing during the vehicle development stage. When the engine relationship adjustment table is obtained, the vehicle speed signal can be obtained through the vehicle speed sensor of the CAN bus under various working conditions, and a microphone is arranged at the right ear of the main driver's seat in the vehicle to obtain the vehicle interior noise, extract the engine main order noise of the interior noise, and use the main order noise as the target noise, and correspond to the vehicle speed to obtain the following Figure 3 The noise target curve graph is shown. It can be seen that there is a positive correlation between the noise target and the vehicle speed. During the test, it is necessary to obtain the vehicle's operating conditions and in-car noise. The in-car noise is obtained by processing the noise at the right ear of the main driver. And the current noise target is obtained through the noise target curve graph according to the current vehicle speed. Then compare the vehicle's noise with the noise target to determine whether the current engine state requires noise optimization. When the current vehicle's noise is greater than the noise target at the current speed, it means that the current noise is too large and noise optimization is required. Therefore, in order to ensure that the power of the vehicle remains unchanged during driving, the purpose of reducing vehicle noise can be achieved by reducing the engine speed. The engine speed adjustment will cause the torque to increase. At this time, if the speed is reduced too quickly, the vehicle noise will increase due to the increase in torque. Therefore, it is necessary to find a suitable engine speed increase rate. At this time, you can follow the following Figure 7 The noise optimization flow chart shown in the figure is used for operation. Figure 7In the process, the noise target of acceleration condition needs to be formulated first, that is, the noise target curve is obtained, and the power demand under each scenario is obtained. The factors affecting the power demand include power SOC, throttle opening and accessory demand. The accessory demand can be non-driving power such as vehicle air conditioning, audio, and ambient light. According to the power required by the vehicle, the engine speed of the vehicle needs to be maintained at what engine speed. At this time, the engine speed range needs to be determined first, and the engine noise needs to be optimized and debugged. In the debugging process, the vehicle speed needs to be judged first. When the vehicle speed is greater than the noise adjustment speed threshold, the noise optimization is not performed, and the power following strategy is executed. When the vehicle speed is less than the noise adjustment speed threshold, the current vehicle noise needs to be judged against the noise target. When the vehicle noise is compared with the noise target, the speed needs to be adjusted by a unit step according to the preset engine speed increase rate, and the vehicle noise is obtained again and compared with the noise target. When the vehicle noise is compared with the noise target, the engine speed increase threshold is increased, and the noise in the car is compared with the noise target again. When the speed is adjusted, the vehicle speed will not change, so the noise target will not change. If the vehicle noise is still greater than the noise target, the step of reducing the engine speed is executed again, but the engine speed adjustment needs to be made according to the updated engine speed increase rate. According to this process, the most suitable engine speed and the corresponding engine speed increase rate can be found, so that the engine speed adjustment can be kept at a more economical angle and reduce energy consumption.

[0082] Further, when the noise of the vehicle is greater than the target noise, the power generation is kept unchanged, the speed and speed increase rate of the engine of the vehicle are reduced, and the adjusted engine operating condition is obtained, including:

[0083] The engine operating condition includes the engine speed and the engine speed increase rate;

[0084] When the noise of the vehicle is greater than the target noise, the engine speed and the speed increase rate are adjusted according to a preset adjustment range to obtain an adjusted engine operating condition, wherein the adjusted engine operating condition includes an adjusted engine speed and an adjusted engine speed increase rate.

[0085] In the specific implementation, the engine operating conditions include the engine speed and the engine speed rise rate. The engine speed refers to the speed range value for the vehicle to maintain the current vehicle power demand under the current operating conditions, and the engine speed rise rate refers to the description of the speed adjustment speed when the vehicle is adjusting the speed. When the engine speed needs to be adjusted, the engine speed needs to be used as the critical value. When reducing the engine speed, the speed cannot be adjusted below the engine speed, otherwise it will cause insufficient output power during the vehicle's driving process, resulting in driving hazards. Therefore, when optimizing the vehicle noise, the vehicle engine speed needs to be monitored to ensure that the engine speed does not drop too low while the engine speed decreases, thereby causing safety hazards.

[0086] Further, the obtaining the operating condition of the vehicle includes:

[0087] Determining a vehicle electrical balancing strategy for the vehicle;

[0088] According to the vehicle electrical balancing strategy, the driving power requirement, accessory power requirement and supplementary power requirement of the vehicle under the vehicle electrical balancing strategy are obtained;

[0089] Obtaining the engine power demand according to the driving power demand, the accessory power demand and the supplementary power demand;

[0090] According to the power generation demand, combined with the engine fuel consumption and emission performance, the initial engine power generation conditions at various power generation powers are obtained.

[0091] An operating condition of the vehicle is determined based on the initial engine power generation operating condition.

[0092] In the specific implementation, the working condition of the vehicle needs to be considered when optimizing the vehicle noise. Among them, the vehicle's whole vehicle electrical balance strategy can reflect the working mode of the vehicle, and the driving power demand of the whole vehicle, the accessory power demand of the vehicle, and the supplementary power demand are determined according to the whole vehicle electrical balance strategy. The driving power demand of the vehicle is determined according to the throttle opening and closing degree of the vehicle. When the throttle opening and closing degree is large, the driving power required by the vehicle increases. The accessory power demand refers to the power demand of equipment such as air conditioners. The supplementary power demand is determined according to the current battery power SOC. When the power SOC is lower than the supplementary power threshold, the engine needs to drive to generate electricity to supplement the battery. Therefore, the engine power demand is determined according to the vehicle's driving power demand, accessory power demand, and supplementary power demand, and the vehicle's working condition is obtained. Since the engine power generation is generated by the engine working, considering the variability of the vehicle's working condition, the engine speed of the vehicle is set within a range. That is to say, one working condition of the vehicle corresponds to an engine speed range.

[0093] This embodiment determines the selection range of the engine speed of the vehicle under the corresponding working condition and the corresponding vehicle speed according to the working condition of the vehicle and the power demand of the vehicle. When adjusting the engine speed, the power generation power is kept unchanged, and the engine speed is adjusted to a suitable position to reduce the engine noise. At the same time, a suitable engine speed increase rate is selected to ensure that excessive noise is not generated when the engine speed is reduced, so that the vehicle can reduce the engine noise during the process with the most economical strategy, providing users with a relatively quiet riding environment.

[0094] In addition, an embodiment of the present invention further provides a storage medium, on which a vehicle noise optimization program is stored. When the vehicle noise optimization program is executed by a processor, the steps of the vehicle noise optimization method described above are implemented.

[0095] Reference Figure 8 , Figure 8 This is a structural block diagram of the first embodiment of the vehicle noise optimization device of the present invention.

[0096] like Figure 8 As shown, the vehicle noise optimization device proposed in the embodiment of the present invention includes:

[0097] The vehicle condition determination module 10 obtains an engine operating condition adjustment relationship table according to the engine fuel consumption and emission performance;

[0098] The vehicle condition determination module 10 is also used to obtain the current vehicle condition and vehicle speed of the vehicle;

[0099] a strategy determination module 20, configured to search the engine operating condition adjustment relationship table according to the current vehicle operating condition and the vehicle speed when the vehicle speed is less than the noise adjustment vehicle speed threshold, and obtain a target engine adjustment strategy corresponding to the current vehicle operating condition and the vehicle speed, wherein the target engine adjustment strategy includes a target engine speed adjustment strategy and a target engine speed increase rate adjustment strategy;

[0100] The noise optimization device 30 is used to adjust the engine speed and the speed increase rate according to the target engine adjustment strategy, so that the engine speed is in the target generator working condition and the noise of the vehicle is reduced.

[0101] This embodiment obtains the current vehicle operating condition and speed of the vehicle, and when the vehicle speed is less than the noise adjustment speed threshold, searches the engine adjustment relationship table according to the current vehicle operating condition and the vehicle speed to obtain the target engine adjustment strategy corresponding to the current vehicle operating condition and the vehicle speed. The target engine adjustment strategy includes a target engine speed adjustment strategy and a target engine speed increase rate adjustment strategy. The engine speed and the speed increase rate are adjusted according to the target engine adjustment strategy to make the engine speed in the target generator operating condition and reduce the noise of the vehicle. The present invention can reduce the engine noise during vehicle driving in a more economical way based on the consideration of the vehicle NVH performance.

[0102] In one embodiment, the strategy determination module 20 is further used to obtain the in-vehicle noise at the right ear of the driver's seat of the vehicle, extract the main-order noise of the engine in-vehicle noise as a control target; formulate the main-order noise target of the engine corresponding to each vehicle speed, and generate a target noise curve diagram based on the correspondence between the main-order noise and the vehicle speed; obtain the working condition of the vehicle, the speed of the vehicle and the noise of the vehicle; obtain the target noise corresponding to the speed according to the speed of the vehicle and the target noise curve diagram; when the noise of the vehicle is greater than the target noise, keep the power generation unchanged, reduce the speed and speed increase rate of the engine of the vehicle, and obtain to an adjusted engine operating condition; obtaining the noise of the vehicle again under the adjusted engine operating condition, and when the noise of the vehicle is not greater than the target noise, using the adjusted engine operating condition as the operating condition of the vehicle and the target engine adjustment strategy corresponding to the vehicle speed; repeating the steps of obtaining the operating condition of the vehicle, the speed of the vehicle, and the noise of the vehicle until the operating condition of the vehicle and the speed of the vehicle both obtain the target engine adjustment strategy, and generating an engine regulation relationship table according to the operating condition of the vehicle, the speed of the vehicle, and the target engine adjustment strategy corresponding to the operating condition of the vehicle and the vehicle speed.

[0103] In one embodiment, the strategy determination module 20 is also used to repeat the steps of keeping the generated power unchanged, reducing the speed and speed increase rate of the engine of the vehicle, and obtaining an adjusted engine operating condition when the noise of the vehicle is greater than the target noise, until the noise of the vehicle is no greater than the target noise, and obtaining the target engine adjustment strategy corresponding to the vehicle speed.

[0104] In one embodiment, the strategy determination module 20 is also used for the engine operating condition including the engine speed and the engine speed rise rate; when the noise of the vehicle is greater than the target noise, the engine speed and the speed rise rate are adjusted according to a preset adjustment range to obtain an adjusted engine operating condition, and the adjusted engine operating condition includes an adjusted engine speed and an adjusted engine speed rise rate.

[0105] In one embodiment, the strategy determination module 20 is also used to determine the vehicle's whole vehicle electric balancing strategy; obtain the vehicle's driving power requirement, accessory power requirement and supplementary power requirement under the whole vehicle electric balancing strategy according to the whole vehicle electric balancing strategy; obtain the engine power generation requirement according to the driving power requirement, the accessory power requirement and the supplementary power requirement; obtain the initial engine power generation operating conditions under each power generation according to the power generation power requirement, combined with the engine fuel consumption and emission performance; and determine the operating conditions of the vehicle according to the initial engine power generation operating conditions.

[0106] In one embodiment, the strategy determination module 20 is further used to determine the power generation mode of the vehicle engine according to the vehicle electrical balancing strategy; and obtain the driving power requirement according to the throttle opening of the vehicle and the power generation mode of the vehicle engine.

[0107] In one embodiment, the noise optimization device 30 is also used to adjust the current engine speed of the vehicle according to the target speed increase rate of the engine until the noise of the vehicle is less than or equal to the current target noise, so that the engine speed is in the target generator operating condition, thereby reducing the noise of the vehicle.

[0108] It should be understood that the above is only an example and does not constitute any limitation on the technical solution of the present invention. In specific applications, technicians in this field can make settings as needed, and the present invention does not limit this.

[0109] It should be understood that, although the various steps in the flowchart in the embodiment of the present application are displayed in sequence according to the indication of the arrows, these steps are not necessarily performed in sequence according to the order indicated by the arrows. Unless there is a clear explanation in this article, the execution of these steps does not have a strict order restriction, and it can be performed in other orders. Moreover, at least a portion of the steps in the figure may include a plurality of sub-steps or a plurality of stages, and these sub-steps or stages are not necessarily performed at the same time, but can be performed at different times, and their execution order is not necessarily performed in sequence, but can be performed in turn or alternately with other steps or at least a portion of the sub-steps or stages of other steps.

[0110] It should be noted that the workflow described above is merely illustrative and does not limit the scope of protection of the present invention. In practical applications, technicians in this field can select part or all of them according to actual needs to achieve the purpose of the present embodiment, and no limitation is made here.

[0111] In addition, it should be noted that, in this article, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or system including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or system. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the existence of other identical elements in the process, method, article or system including the element.

[0112] The serial numbers of the above embodiments of the present invention are only for description and do not represent the advantages or disadvantages of the embodiments.

[0113] Through the description of the above implementation methods, those skilled in the art can clearly understand that the above-mentioned embodiment methods can be implemented by means of software plus a necessary general hardware platform, and of course by hardware, but in many cases the former is a better implementation method. Based on such an understanding, the technical solution of the present invention, or the part that contributes to the prior art, can be embodied in the form of a software product, which is stored in a storage medium (such as a read-only memory (ROM) / RAM, a magnetic disk, or an optical disk), and includes a number of instructions for a terminal device (which can be a mobile phone, a computer, a server, or a network device, etc.) to execute the methods described in each embodiment of the present invention.

[0114] The above are only preferred embodiments of the present invention, and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A vehicle noise optimization method, characterized in that: The vehicle noise optimization method comprises: Obtaining an engine operating condition adjustment relationship table according to the engine fuel consumption and emission performance; Get the current vehicle operating condition and speed of the vehicle; When the vehicle speed is less than the noise adjustment vehicle speed threshold, searching the engine operating condition adjustment relationship table according to the current vehicle operating condition and the vehicle speed to obtain a target engine adjustment strategy corresponding to the current vehicle operating condition and the vehicle speed, wherein the target engine adjustment strategy includes a target engine speed adjustment strategy and a target engine speed increase rate adjustment strategy; Adjusting the engine speed and speed increase rate according to the target engine adjustment strategy so that the engine speed is at a target generator operating condition and the noise of the vehicle is reduced; Wherein, when the vehicle speed is less than the noise adjustment vehicle speed threshold, before searching the engine operating condition adjustment relationship table according to the current vehicle operating condition and the vehicle speed, the method further includes: Obtain the in-car noise at the right ear of the driver's seat, and extract the main order noise of the engine in the in-car noise as the control target; Formulate a main-order noise target of the engine corresponding to each vehicle speed, and generate a target noise curve diagram based on the corresponding relationship between the main-order noise and the vehicle speed; Acquiring the operating condition of the vehicle, the speed of the vehicle, and the noise of the vehicle; Obtaining a target noise corresponding to the vehicle speed according to the vehicle speed and the target noise curve graph; When the noise of the vehicle is greater than the target noise, the generated power is kept unchanged, the speed and speed increase rate of the engine of the vehicle are reduced, and an adjusted engine operating condition is obtained; acquiring the noise of the vehicle again under the adjusted engine operating condition, and when the noise of the vehicle is not greater than the target noise, using the adjusted engine operating condition as the operating condition of the vehicle and the target engine adjustment strategy corresponding to the vehicle speed; Repeat the steps of obtaining the operating condition of the vehicle, the speed of the vehicle and the noise of the vehicle until the operating condition of the vehicle and the speed of the vehicle obtain the target engine adjustment strategy, and generate an engine adjustment relationship table according to the operating condition of the vehicle, the speed of the vehicle and the target engine adjustment strategy corresponding to the operating condition of the vehicle and the speed.

2. The method according to claim 1, characterized in that After obtaining the noise of the vehicle again under the adjusted engine operating condition, the method further includes: When the noise of the vehicle is greater than the target noise, the steps of maintaining the generated power unchanged, reducing the speed and the speed increase rate of the engine of the vehicle, and obtaining an adjusted engine operating condition are repeated until the noise of the vehicle is no greater than the target noise, and a target engine adjustment strategy corresponding to the vehicle speed is obtained.

3. The method according to claim 1, characterized in that When the noise of the vehicle is greater than the target noise, the generated power is kept unchanged, the speed and speed increase rate of the engine of the vehicle are reduced, and the adjusted engine operating condition is obtained, including: The engine operating condition includes the engine speed and the engine speed increase rate; When the noise of the vehicle is greater than the target noise, the engine speed and the speed increase rate are adjusted according to a preset adjustment range to obtain an adjusted engine operating condition, wherein the adjusted engine operating condition includes an adjusted engine speed and an adjusted engine speed increase rate.

4. The method according to claim 1, characterized in that The obtaining the operating condition of the vehicle includes: Determining a vehicle electrical balancing strategy for the vehicle; According to the vehicle electrical balancing strategy, the driving power requirement, accessory power requirement and supplementary power requirement of the vehicle under the vehicle electrical balancing strategy are obtained; Obtaining the engine power demand according to the driving power demand, the accessory power demand and the supplementary power demand; According to the power generation demand, combined with the engine fuel consumption and emission performance, the initial engine power generation conditions under various power generation are obtained; An operating condition of the vehicle is determined based on the initial engine power generation operating condition.

5. The method according to claim 4, characterized in that The obtaining, according to the vehicle electrical balancing strategy, the driving power requirement of the vehicle under the vehicle electrical balancing strategy comprises: Determining a power generation mode of the vehicle engine according to the vehicle electrical balancing strategy; The driving power requirement is obtained according to the throttle opening of the vehicle and the power generation mode of the vehicle engine.

6. The method according to any one of claims 1 to 5, characterized in that The adjusting the engine speed and the speed increase rate according to the target engine adjustment strategy so that the engine speed is in a target power generation condition and the noise of the vehicle is reduced includes: The current engine speed of the vehicle is adjusted according to the target engine speed rising rate until the noise of the vehicle is less than or equal to the current target noise, so that the engine speed is in the target power generation condition and the noise of the vehicle is reduced.

7. A vehicle noise optimization device, characterized in that: The vehicle noise optimization device comprises: A vehicle condition determination module, used to obtain the current vehicle condition and speed of the vehicle; a strategy determination module, configured to search an engine adjustment relationship table according to the current vehicle operating condition and the vehicle speed when the vehicle speed is less than the noise adjustment vehicle speed threshold, and obtain a target engine adjustment strategy corresponding to the current vehicle operating condition and the vehicle speed, wherein the target engine adjustment strategy includes a target engine speed adjustment strategy and a target engine speed increase rate adjustment strategy; A noise optimization device, used to adjust the engine speed and speed increase rate according to the target engine adjustment strategy, so that the engine speed is in a target power generation condition and the noise of the vehicle is reduced; Wherein, when the vehicle speed is less than the noise adjustment vehicle speed threshold, before searching the engine operating condition adjustment relationship table according to the current vehicle operating condition and the vehicle speed, the method further includes: Obtain the in-car noise at the right ear of the driver's seat, and extract the main order noise of the engine in the in-car noise as the control target; Formulate a main-order noise target of the engine corresponding to each vehicle speed, and generate a target noise curve diagram based on the corresponding relationship between the main-order noise and the vehicle speed; Acquiring the operating condition of the vehicle, the speed of the vehicle, and the noise of the vehicle; Obtaining a target noise corresponding to the vehicle speed according to the vehicle speed and the target noise curve graph; When the noise of the vehicle is greater than the target noise, the generated power is kept unchanged, the speed and speed increase rate of the engine of the vehicle are reduced, and an adjusted engine operating condition is obtained; acquiring the noise of the vehicle again under the adjusted engine operating condition, and when the noise of the vehicle is not greater than the target noise, using the adjusted engine operating condition as the operating condition of the vehicle and the target engine adjustment strategy corresponding to the vehicle speed; Repeat the steps of obtaining the operating condition of the vehicle, the speed of the vehicle and the noise of the vehicle until the operating condition of the vehicle and the speed of the vehicle obtain the target engine adjustment strategy, and generate an engine adjustment relationship table according to the operating condition of the vehicle, the speed of the vehicle and the target engine adjustment strategy corresponding to the operating condition of the vehicle and the speed.

8. A vehicle noise optimization device, characterized in that: The device comprises: a memory, a processor, and a vehicle noise optimization program stored in the memory and executable on the processor, wherein the vehicle noise optimization program is configured to implement the steps of the vehicle noise optimization method according to any one of claims 1 to 6.

9. A storage medium, characterized in that: The storage medium stores a vehicle noise optimization program, and when the vehicle noise optimization program is executed by the processor, the steps of the vehicle noise optimization method according to any one of claims 1 to 6 are implemented.

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