A method, apparatus, equipment, and medium for NVH matching of charging power for hybrid vehicles.

Abstract

This disclosure provides a method, device, equipment, and medium for NVH matching of charging power for hybrid vehicles, belonging to the field of NVH control technology for plug-in hybrid new energy vehicles. Modal recognition results are obtained by performing modal recognition on the steering wheel and seat of a real vehicle under idling conditions; the engine speed operating range under idling conditions is calibrated; the engine speed operating range is adjusted according to the modal recognition results; an output power curve is generated by frequency sweeping the vehicle's power point through a fixed engine speed excitation; the first electrical power consumption of the vehicle's equipment is obtained; and power matching is performed based on the first electrical power consumption and the output power curve. Therefore, from the perspective of NVH performance development, the vehicle's idling charging power is optimized by systematically matching the excitation source, transmission path, and response. Adjusting the engine speed avoids noise and vibration problems caused by the vehicle's resonance zone, achieving lower vibration and noise during idling charging.

Description

Technical Field

[0001] This disclosure belongs to the field of NVH control technology for plug-in hybrid new energy vehicles, and specifically relates to a method, device, equipment and medium for NVH matching of charging power for hybrid vehicles. Background Technology

[0002] Hybrid vehicles remain a mainstream type of new energy vehicle, especially plug-in hybrid vehicles. Existing plug-in hybrid vehicles generally have a pure electric range of 60 to 200 kilometers. Beyond the pure electric range, the engine or range extender will intervene, or the plug-in hybrid will be charged to ensure electric drive.

[0003] NVH (Noise, Vibration, and Harshness) in plug-in hybrid vehicles is affected by engine power during idling charging. NVH is a comprehensive issue that measures the quality of vehicle manufacturing, and it provides the most direct and superficial experience for car users. Vehicle NVH is a major concern for major international automotive manufacturers and parts suppliers. Statistics show that approximately one-third of vehicle malfunctions are related to NVH issues.

[0004] Existing plug-in hybrid vehicles suffer from reduced NVH performance due to idling charging caused by low battery levels. This cannot be effectively controlled and can lead to engine noise and vibration. There is a lack of methods to match idling charging power with NVH. Summary of the Invention

[0005] In view of the above problems, this disclosure proposes a method, device, equipment and medium for matching the charging power NVH of hybrid vehicles. Through structural optimization, engine speed adjustment and idle charging strategy calibration optimization, the method can reduce the vibration and noise of the whole vehicle when it is idling and charging, thereby improving the NVH of the whole vehicle.

[0006] This disclosure provides a method for NVH matching of charging power for hybrid vehicles, including:

[0007] Under the premise of vehicle idling and meeting charging power requirements, NVH modal recognition was performed on the steering wheel and seat of the actual vehicle to obtain modal recognition results;

[0008] Adjust the engine idling speed range to avoid the engine speed corresponding to the modality recognition result;

[0009] Within the adjusted engine idle speed range, determine the engine speed and torque corresponding to the optimal charging power.

[0010] Furthermore, the NVH modal recognition of the actual vehicle steering wheel and seat to obtain the modal recognition results includes:

[0011] The vibration values ​​of the steering wheel and seat in a real vehicle are obtained to generate a vibration index;

[0012] The vibration values ​​of the steering wheel and seat in the actual vehicle are obtained based on the vibration frequency of the vehicle under idling conditions.

[0013] Furthermore, the method also includes:

[0014] Obtain the in-vehicle noise frequency and in-vehicle sound pressure level, and generate in-vehicle order noise based on the in-vehicle noise frequency;

[0015] The idling charging power sound pressure level is determined by the in-vehicle sound pressure level and the in-vehicle order noise.

[0016] Furthermore, adjusting the engine idling speed range to avoid the engine speed corresponding to the modal recognition result includes: calibrating the speed range under engine idling conditions;

[0017] The output power curve is generated by sweeping the power point of the whole vehicle with a fixed engine speed excitation.

[0018] Among them, the engine speed range under idling conditions is calibrated based on the power response and electrical power consumption under idling conditions.

[0019] Furthermore, the power response in the idling state includes:

[0020] The engine output power provided by the engine to the vehicle's power response while the vehicle is in operation.

[0021] Furthermore, adjusting the engine idle speed range to avoid the engine speed corresponding to the modal recognition result includes: adjusting the engine speed range according to the modal recognition result.

[0022] Among these, a modal frequency distribution table is generated based on the modal recognition results.

[0023] The engine speed operating range is adjusted according to the modal frequency distribution table within the engine's lowest and highest operating speed ranges.

[0024] Furthermore, determining the engine speed and torque corresponding to the optimal charging power within the adjusted engine idle speed range includes:

[0025] Obtain the first power consumption of the vehicle equipment; perform power matching based on the first power consumption and the output power curve;

[0026] The power matching based on the first power consumption and the output power curve includes:

[0027] The first power consumption is determined by acquiring the power consumption of the vehicle's air conditioning, heater, and lighting and audio equipment.

[0028] The power range on the output power curve is matched according to the first power consumption.

[0029] Adjust the engine operating speed by using the power range on the output power curve.

[0030] Based on the same inventive concept, another aspect of this disclosure provides a plug-in hybrid vehicle idle charging power NVH matching device, comprising:

[0031] The modal recognition unit is used to perform NVH modal recognition on the steering wheel and seat of a real vehicle under the premise of vehicle idling and charging power requirements, and obtain modal recognition results.

[0032] The speed excitation unit is used to adjust the engine idling speed range to avoid the engine speed corresponding to the modality recognition result;

[0033] The power matching unit is used to determine the engine speed and torque corresponding to the optimal charging power within the adjusted engine idle speed range.

[0034] Based on the same inventive concept, another aspect of the present disclosure provides an electronic device, including: a processor, a communication interface, a memory, and a communication bus, wherein the processor, the communication interface, and the memory communicate with each other through the communication bus;

[0035] Memory, which stores computer programs;

[0036] When the processor executes the program stored in the memory, it implements a method for matching the charging power NVH of a hybrid vehicle.

[0037] Based on the same inventive concept, another aspect of the present disclosure provides a computer-readable storage medium storing a computer program, which, when executed by a processor, implements a hybrid vehicle charging power NVH matching method.

[0038] The beneficial effects of this disclosure are:

[0039] This disclosure achieves modal recognition results by performing modal recognition on the steering wheel and seat of a real vehicle under idling conditions; calibrating the engine speed operating range under idling conditions; adjusting the engine speed operating range based on the modal recognition results; generating an output power curve by sweeping the vehicle's power point with a fixed engine speed excitation; obtaining the first electrical power consumption of the vehicle's equipment; and performing power matching based on the first electrical power consumption and the output power curve. Therefore, from an NVH performance development perspective, vehicle idling charging power optimization involves systematic matching of the excitation source, transmission path, and response. While maintaining the charging power, strategy optimization adjusts the engine speed to avoid noise and vibration problems caused by the vehicle's resonance zone. Through structural optimization, engine speed adjustment, and idling charging strategy calibration optimization, the vibration and noise of the vehicle are reduced during idling charging.

[0040] Other features and advantages of this disclosure will be set forth in the following description and will be apparent in part from the description or may be learned by practicing the disclosure. The objects and other advantages of this disclosure may be realized and obtained by means of the structures pointed out in the description and the accompanying drawings. Attached Figure Description

[0041] To more clearly illustrate the technical solutions in the embodiments of this disclosure or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0042] Figure 1 A flowchart of a hybrid vehicle charging power NVH matching method according to an embodiment of this application is shown;

[0043] Figure 2 This paper shows a schematic diagram of a hybrid vehicle charging power NVH matching device according to an embodiment of this application;

[0044] Figure 3 A schematic diagram of an electronic device structure according to an embodiment of this application is shown. Detailed Implementation

[0045] To make the objectives, technical solutions, and advantages of the embodiments of this disclosure clearer, the technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this disclosure, and not all embodiments. Based on the embodiments of this disclosure, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this disclosure.

[0046] It should be noted that the terms "first," "second," etc., used in this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate for the embodiments of this application described herein. In this application, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," "longitudinal," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings.

[0047] It should be noted that NVH (Noise, Vibration, and Harshness) is a comprehensive issue that measures the quality of automobile manufacturing, and it provides the most direct and superficial experience for car users. NVH issues are a major concern for major international automotive manufacturers and parts suppliers. Statistics show that approximately one-third of vehicle malfunctions are related to NVH problems.

[0048] Existing plug-in hybrid vehicles suffer from reduced NVH performance due to idling charging caused by low battery levels. This cannot be effectively controlled and can lead to engine noise and vibration. There is a lack of methods to match idling charging power with NVH.

[0049] This disclosure provides a method for NVH matching of charging power in hybrid vehicles. (See also...) Figure 1 ,include:

[0050] S101: Under the condition of vehicle idling and under the premise of meeting the charging power, perform NVH modal recognition on the steering wheel and seat of the actual vehicle to obtain the modal recognition results;

[0051] S102: Adjust the engine idle speed range to avoid the engine speed corresponding to the modality recognition result;

[0052] S103: Within the adjusted engine idle speed range, determine the engine speed and torque corresponding to the optimal charging power.

[0053] It should be noted that this disclosure optimizes the vehicle's idling charging power from the perspective of NVH performance development. When the vehicle's battery level is low, the vehicle is charged by the engine power during idling. Since the vehicle's electrical appliances consume some power during idling, and the NVH performance inside the vehicle is reduced during idling, it is necessary to adjust the engine speed to match the charging power with the vehicle's NVH, thereby reducing vibration and noise during idling charging.

[0054] In step S101, the modal recognition of the actual vehicle steering wheel and seat to obtain the modal recognition result includes:

[0055] The vibration values ​​of the steering wheel and seat in a real vehicle are obtained to generate a vibration index;

[0056] The vibration values ​​of the steering wheel and seat in the actual vehicle are obtained based on the vibration frequency of the vehicle under idling conditions.

[0057] The vibration values ​​of the steering wheel and seat in a real vehicle reflect the overall vibration effect inside the vehicle and can indicate the comfort of the passengers. These vibration values ​​can be detected by vibration sensors installed in the steering wheel and seat cushions or backrests.

[0058] The method further includes: acquiring the in-vehicle noise frequency and the in-vehicle sound pressure level, and generating in-vehicle order noise based on the in-vehicle noise frequency;

[0059] The idling charging power sound pressure level is determined by the in-vehicle sound pressure level and the in-vehicle order noise.

[0060] The noise frequency and sound pressure level inside the vehicle are parameters for identifying noise and reflecting the quietness of the vehicle interior. These parameters are obtained through noise frequency sensors and sound pressure sensors and are part of the vehicle modal recognition.

[0061] In step S102, adjusting the engine idling speed range to avoid the engine speed corresponding to the modal identification result includes: calibrating the speed range under engine idling conditions.

[0062] The output power curve is generated by sweeping the power point of the whole vehicle with a fixed engine speed excitation.

[0063] Among them, the engine speed range under idling conditions is calibrated based on the power response and electrical power consumption under idling conditions.

[0064] The power response under idling conditions includes:

[0065] The engine output power provided by the engine to the vehicle's power response while the vehicle is in operation.

[0066] Specifically, the minimum and maximum idle engine speed ranges are determined, with the commonly used speeds being in the range of 800 rpm to 1500 rpm; the engine output torque is determined by the charging power. In this disclosure, in addition to considering the electrical power consumption, the engine charging power is adjusted according to NVH requirements.

[0067] In step S102, adjusting the engine idle speed range to avoid the engine speed corresponding to the modal recognition result further includes: adjusting the engine speed range according to the modal recognition result.

[0068] Among these, a modal frequency distribution table is generated based on the modal recognition results.

[0069] The engine speed operating range is adjusted according to the modal frequency distribution table within the engine's lowest and highest operating speed ranges.

[0070] The modal frequency distribution table includes the distribution of modal frequencies, specifically including vehicle vibration, vehicle noise, and vehicle sound pressure level. The torque generated in the engine's speed range can directly affect the modal frequency distribution.

[0071] In step S103, determining the engine speed and torque corresponding to the optimal charging power within the adjusted engine idle speed range includes:

[0072] Obtain the first power consumption of the vehicle equipment; perform power matching based on the first power consumption and the output power curve;

[0073] The power matching based on the first power consumption and the output power curve includes:

[0074] The first power consumption is determined by acquiring the power consumption of the vehicle's air conditioning, heater, and lighting and audio equipment.

[0075] The power range on the output power curve is matched according to the first power consumption.

[0076] The engine operating speed is adjusted by controlling the power range on the output power curve. This ensures that the torque produced by the engine is appropriate for the vehicle's NVH (noise, vibration, and harshness).

[0077] The control principle of the vehicle system in this disclosure is to change the charging power setting strategy based on the transmission vehicle's speed frequency avoidance, and increase the engine torque output variable. The system is adjusted using both engine speed and torque to meet the vehicle's minimum charging power requirements.

[0078] Within the speed and torque range, CAE analysis and real vehicle verification are used to adjust the resonance caused by engine speed excitation coupling through modal frequency avoidance; at the same time, the optimal solution for the idling charging power sound pressure level is determined by the difference between the in-vehicle sound pressure level and the in-vehicle order noise.

[0079] The charging power selection takes into account the high-voltage power consumption of PTC, air conditioning, etc. as input, and then combines CAE analysis and actual vehicle confirmation of steering wheel and seat modes to determine the engine speed excitation to be avoided to reduce the probability of vibration in the vehicle; the minimum and maximum idle speed range of the engine is determined, with the commonly used speed range being 800rpm to 1500rpm; the engine output torque is determined by the charging power; and by combining the engine speed and vehicle modal frequency distribution table, the frequencies that the seat and steering wheel need to avoid are determined in the minimum and maximum engine operating speed range.

[0080] Based on the vibration curves of the steering wheel and seat rails, as well as the sound pressure level and order noise inside the vehicle, the charging torque at different engine speeds was determined.

[0081] Based on the same inventive concept, this disclosure also provides a plug-in hybrid vehicle idle charging power NVH matching device, see [link to relevant documentation]. Figure 2 ,include:

[0082] The modal recognition unit 201 is used to perform NVH modal recognition on the steering wheel and seat of the actual vehicle under the condition of vehicle idling and under the premise of meeting the charging power, and obtain the modal recognition result.

[0083] The speed excitation unit 202 is used to adjust the engine idle speed range to avoid the engine speed corresponding to the mode recognition result;

[0084] The power matching unit 203 is used to determine the engine speed and torque corresponding to the optimal charging power within the adjusted engine idle speed range.

[0085] Based on the same inventive concept, this disclosure also provides an electronic device 161, see [link to previous document]. Figure 3 It includes a processor 164, a communication interface 165, a memory 162, and a communication bus, wherein the processor 164, the communication interface 165, and the memory 162 communicate with each other through the communication bus;

[0086] Memory 162 stores computer program 163;

[0087] When processor 164 executes the program stored in memory 162, it implements a hybrid vehicle charging power NVH matching method.

[0088] The aforementioned communication bus can be a Peripheral Component Interconnect (PCI) bus or an Extended Industry Standard Architecture (EISA) bus, etc. This communication bus can be divided into address bus, data bus, control bus, etc.

[0089] The communication interface 165 is used for communication between the aforementioned electronic device 161 and other devices.

[0090] The memory 162 may include random access memory (RAM) or non-volatile memory, such as at least one disk storage device. Optionally, the memory 162 may also be at least one storage device located remotely from the aforementioned processor 164.

[0091] The processor 164 mentioned above can be a general-purpose processor 164, including a central processing unit (CPU), a network processor (NP), etc.; it can also be a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, or discrete hardware components.

[0092] Based on the same inventive concept, another aspect of the present disclosure provides a computer-readable storage medium storing a computer program 163, which, when executed by a processor 164, implements a hybrid vehicle charging power NVH matching method.

[0093] The computer-readable storage medium may be included in the device / apparatus described in the above embodiments; or it may exist independently and not assembled into the device / apparatus. The computer-readable storage medium carries one or more programs that, when executed, implement a hybrid vehicle charging power NVH matching method according to an embodiment of this disclosure.

[0094] The above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

Claims

1. A method for NVH matching of charging power in hybrid vehicles, characterized in that, include: Under the premise of vehicle idling and sufficient charging power, NVH modal recognition is performed on the actual vehicle's steering wheel and seat to obtain modal recognition results, including: obtaining the vibration values ​​of the actual vehicle's steering wheel and seat to generate a vibration index; obtaining the in-vehicle noise frequency and in-vehicle sound pressure level, and generating in-vehicle order noise based on the in-vehicle noise frequency; determining the idling charging power sound pressure level through the in-vehicle sound pressure level and the in-vehicle order noise; wherein, the vibration values ​​of the actual vehicle's steering wheel and seat are values ​​obtained based on the vibration frequency of the vehicle under idling conditions; Adjusting the engine idle speed range to avoid the engine speed corresponding to the modal identification result includes: calibrating the engine idle speed range: generating an output power curve by sweeping the vehicle power point using a fixed engine speed excitation; wherein, the engine idle speed range is calibrated based on the power response and electrical power consumption under idle conditions; the power response under idle conditions includes the engine output power provided by the engine for the vehicle's power response under vehicle operation conditions; adjusting the engine speed range according to the modal identification result: wherein, a modal frequency distribution table is generated based on the modal identification result, and the engine speed range is adjusted according to the modal frequency distribution table within the engine's lowest and highest operating speed ranges; Within the adjusted engine idle speed range, determine the engine speed and torque corresponding to the optimal charging power, including: acquiring the first electrical power consumption of the vehicle equipment; and performing power matching based on the first electrical power consumption and the output power curve, including: The first power consumption is determined by acquiring the power consumption of the vehicle's air conditioning, heater, and lighting and audio equipment; the power range on the output power curve is matched according to the first power consumption; and the engine operating speed is adjusted according to the power range on the output power curve.

2. A plug-in hybrid vehicle idle charging power NVH matching device, used to implement the hybrid vehicle charging power NVH matching method according to claim 1, characterized in that, include: The modal recognition unit is used to perform NVH modal recognition on the steering wheel and seat of a real vehicle under the premise of vehicle idling and charging power requirements, and obtain modal recognition results. The speed excitation unit is used to adjust the engine idling speed range to avoid the engine speed corresponding to the modality recognition result; The power matching unit is used to determine the engine speed and torque corresponding to the optimal charging power within the adjusted engine idle speed range.

3. An electronic device, characterized in that, include: The processor, communication interface, memory, and communication bus are connected, with the processor, communication interface, and memory communicating with each other via the communication bus. Memory, which stores computer programs; When the processor executes the program stored in the memory, it implements the hybrid vehicle charging power NVH matching method as described in claim 1.

4. A computer-readable storage medium, characterized in that, The device contains a computer program that, when executed by a processor, implements the NVH matching method for charging power of a hybrid vehicle as described in claim 1.

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