Hybrid vehicle charging power NVH matching method, device, equipment and medium

Abstract

The invention provides a hybrid vehicle charging power NVH matching method, device and equipment and a medium, and belongs to the technical field of plug-in hybrid new energy vehicle type NVH control. The method comprises the following steps: performing modal identification on a steering wheel and a seat of a real vehicle to obtain a modal identification result under an idling working condition of the vehicle; calibrating a rotating speed operation interval of the engine under an idling operation condition; according to the modal recognition result, the engine rotating speed operation interval is adjusted; sweep frequency is performed on a whole vehicle power point through fixed engine rotating speed excitation to generate an output power curve; acquiring first electricity utilization power of the vehicle equipment; and carrying out power matching according to the first electric power and the output power curve, thereby knowing that the idling charging power of the whole vehicle is optimized from the perspective of NVH performance development, and systematic matching is carried out from three parts of excitation source-transmission path-response. The rotating speed of the engine is adjusted to avoid noise and vibration caused by a resonance band of the whole vehicle, and the effect that vibration and noise are small when the whole vehicle works in an idling charging mode is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of NVH control of plug-in hybrid new energy vehicles, and in particular to a method, device, equipment and medium for NVH matching of charging power of a hybrid vehicle. Background Art

[0002] Hybrid vehicles are still a mainstream model among current new energy vehicles, especially plug-in hybrid vehicles. Existing plug-in hybrid vehicles generally have a pure electric range of 60 kilometers to 200 kilometers. In addition to the pure electric range, the engine or range extender will intervene, or the plug-in hybrid will be charged to ensure electric driving.

[0003] The NVH of plug-in hybrid vehicles will be affected by the engine power when they are idling and charging. The NVH (noise, vibration and harshness) of a vehicle is a comprehensive issue to measure the quality of vehicle manufacturing. It gives the most direct and superficial experience to car users. The NVH problem of vehicles is one of the issues that major vehicle manufacturers and parts companies in the international automotive industry are concerned about. Statistics show that about 1 / 3 of the faults of vehicles are related to the NVH problem of the vehicle.

[0004] Existing plug-in hybrid vehicles have low battery levels, which causes idling charging, which reduces the NVH performance of the vehicle and cannot be effectively controlled, causing engine operating 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, the present disclosure proposes a hybrid vehicle charging power NVH matching method, device, equipment and medium, which optimizes the structure, engine speed adjustment and idle charging strategy calibration, so as to achieve less vibration and noise when the whole vehicle is idling and charging, thereby improving the NVH of the whole vehicle.

[0006] The embodiment of the present disclosure provides a hybrid vehicle charging power NVH matching method, including:

[0007] Under the premise of vehicle idling and meeting the charging power, the NVH modal identification of the steering wheel and seat of the actual vehicle is carried out to obtain the modal identification results;

[0008] Adjusting the engine idle speed range to avoid the engine speed corresponding to the modal 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 identification of the steering wheel and seat of the actual vehicle is performed to obtain the modal identification result, including:

[0011] Obtain the vibration values ​​of the steering wheel and seat of the actual vehicle to generate the vibration index;

[0012] Among them, the vibration value of the steering wheel and the vibration value of the seat of the actual vehicle are values ​​obtained according to the vibration frequency of the vehicle under idling conditions.

[0013] Furthermore, the method further comprises:

[0014] Acquire the in-vehicle noise frequency and the in-vehicle sound pressure level, and generate in-vehicle order noise according to the in-vehicle noise frequency;

[0015] The idle charging power sound pressure level is determined according to the in-vehicle sound pressure level and the in-vehicle order noise.

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

[0017] The output power curve is generated by sweeping the power point of the vehicle through fixed engine speed excitation;

[0018] Among them, the speed operating range of the engine under idle operation conditions is calibrated according to the power response under idle state and the electric power consumption.

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

[0020] The engine output power provided by the engine for the vehicle's dynamic response when the vehicle is in operation.

[0021] Further, the adjusting the engine idle speed interval to avoid the engine speed corresponding to the modal recognition result includes: adjusting the engine speed operation interval according to the modal recognition result,

[0022] Among them, the modal frequency distribution table is generated according to the modal identification results.

[0023] The engine speed operating range is adjusted according to the modal frequency distribution table within the range of the minimum engine speed and the maximum engine speed.

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

[0025] Acquire a first power consumption of the vehicle equipment; perform power matching according to the first power consumption and the output power curve;

[0026] The step of performing power matching according to the first power consumption and the output power curve includes:

[0027] Determine the first power consumption by acquiring the power consumption of the air conditioner, heater, and lighting and audio equipment in the vehicle;

[0028] matching a power interval on an output power curve according to the first power consumption;

[0029] The engine operating speed is adjusted according to the power range on the output power curve.

[0030] Based on the same inventive concept, the embodiment of the present disclosure also provides a plug-in hybrid vehicle idle charging power NVH matching device, including:

[0031] The modal identification unit is used to perform NVH modal identification on the steering wheel and seat of the actual vehicle under the premise of the vehicle idling condition and meeting the charging power, and obtain the modal identification result;

[0032] A speed excitation unit, used for adjusting the engine idle speed range to avoid the engine speed corresponding to the modal 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 embodiment of the present disclosure further provides an electronic device, comprising: a processor, a communication interface, a memory and a communication bus, wherein the processor, the communication interface and the memory communicate with each other via the communication bus;

[0035] a memory storing a computer program;

[0036] The processor implements a hybrid vehicle charging power NVH matching method when executing the program stored in the memory.

[0037] Based on the same inventive concept, the embodiment of the present disclosure further 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] Beneficial effects of the present disclosure:

[0039] The present invention obtains modal recognition results by performing modal recognition on the steering wheel and seat of a real vehicle under the vehicle idle condition; calibrates the speed operating range under the engine idle condition; adjusts the engine speed operating range according to the modal recognition results; generates an output power curve by sweeping the power point of the whole vehicle through fixed engine speed excitation; obtains the first power consumption of the vehicle equipment; and performs power matching according to the first power consumption and the output power curve. It can be seen that the idle charging power of the whole vehicle is optimized from the perspective of NVH performance development, and systematic matching is performed from the three parts of excitation source-transmission path-response. Under the premise of maintaining the charging power, the engine speed is adjusted through strategy optimization to avoid the noise and vibration problems caused by the resonance band of the whole vehicle. From the perspective of structural optimization, engine speed adjustment and idle charging strategy calibration optimization, the vibration and noise of the whole vehicle are reduced when idling charging.

[0040] Other features and advantages of the present disclosure will be described in the following description, and partly become apparent from the description, or be understood by implementing the present disclosure. The purpose and other advantages of the present disclosure can be realized and obtained by the structures indicated in the description and the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] In order to more clearly illustrate the embodiments of the present disclosure or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0042] Figure 1 A flow chart of a hybrid vehicle charging power NVH matching method according to an embodiment of the present application is shown;

[0043] Figure 2 A schematic diagram of a hybrid vehicle charging power NVH matching device according to an embodiment of the present application is shown;

[0044] Figure 3 A schematic diagram of the structure of an electronic device according to an embodiment of the present application is shown. DETAILED DESCRIPTION

[0045] In order to make the purpose, technical solution and advantages of the embodiments of the present disclosure clearer, the technical solution in the embodiments of the present disclosure will be clearly and completely described below in conjunction with the drawings in the embodiments of the present disclosure. Obviously, the described embodiments are part of the embodiments of the present disclosure, not all of the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present disclosure.

[0046] It should be noted that the terms "first", "second" etc. in the present application are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequential order. It should be understood that the data used in this way can be interchanged in appropriate circumstances, so that the embodiments of the present application described here. In the present application, the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inside", "outside", "middle", "vertical", "horizontal", "lateral", "longitudinal" etc. are 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 to measure the quality of automobile manufacturing. It gives the most direct and superficial experience to automobile users. The NVH problem of vehicles is one of the issues that major vehicle manufacturers and parts manufacturers in the international automobile industry are concerned about. Statistics show that about 1 / 3 of the faults of vehicles are related to the NVH problem of vehicles.

[0048] Existing plug-in hybrid vehicles have low battery levels, which causes idling charging, which reduces the NVH performance of the vehicle and cannot be effectively controlled, causing engine operating noise and vibration. There is a lack of methods to match idling charging power with NVH.

[0049] The present disclosure provides a hybrid vehicle charging power NVH matching method, see Figure 1 ,include:

[0050] S101: Under the premise that the vehicle is idling and the charging power is met, NVH modal identification is performed on the steering wheel and seat of the actual vehicle to obtain a modal identification result;

[0051] S102: adjusting the engine idle speed interval to avoid the engine speed corresponding to the modal recognition result;

[0052] S103: Determine the engine speed and torque corresponding to the optimal charging power within the adjusted engine idle speed range.

[0053] It should be noted that the present invention optimizes the idle charging power of the whole vehicle from the perspective of NVH performance development. When the battery level of the whole vehicle is low, the whole vehicle is charged by the engine power at idle speed. Since the electrical appliances of the whole vehicle will consume part of the power at idle speed and the NVH performance in the vehicle will be reduced at idle speed, it is necessary to adjust the engine speed so that the charging power matches the NVH of the whole vehicle and reduce the vibration and noise during idle charging.

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

[0055] Obtain the vibration values ​​of the steering wheel and seat of the actual vehicle to generate the vibration index;

[0056] Among them, the vibration value of the steering wheel and the vibration value of the seat of the actual vehicle are values ​​obtained according to the vibration frequency of the vehicle under idling conditions.

[0057] The vibration value of the steering wheel and the seat of the actual vehicle reflect the vibration effect inside the vehicle and can reflect the riding comfort of the passengers. The vibration value of the steering wheel and the seat of the actual vehicle can be detected by the vibration sensor installed in the vehicle steering wheel and the seat cushion or backrest.

[0058] The method further includes: acquiring a vehicle interior noise frequency and a vehicle interior sound pressure level, and generating a vehicle interior order noise according to the vehicle interior noise frequency;

[0059] The idle charging power sound pressure level is determined according to the in-vehicle sound pressure level and the in-vehicle order noise.

[0060] The noise frequency and sound pressure level inside the car are parameters for distinguishing noise and reflecting the quietness inside the car. They are parameters inside the car obtained through noise frequency sensors and sound pressure sensors, and are part of the whole vehicle modal recognition.

[0061] In step S102, adjusting the engine idle speed range to avoid the engine speed corresponding to the modal recognition result includes: calibrating the speed range under the engine idle running condition;

[0062] The output power curve is generated by sweeping the power point of the vehicle through fixed engine speed excitation;

[0063] Among them, the speed operating range of the engine under idle operation conditions is calibrated according to the power response under idle state and the electric power consumption.

[0064] The power response in the idle state includes:

[0065] The engine output power provided by the engine for the vehicle's dynamic response when the vehicle is in operation.

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

[0067] In step S102, the adjusting the engine idle speed interval to avoid the engine speed corresponding to the modal recognition result also includes: adjusting the engine speed operation interval according to the modal recognition result,

[0068] Among them, the modal frequency distribution table is generated according to the modal identification results.

[0069] The engine speed operating range is adjusted according to the modal frequency distribution table within the range of the minimum engine speed and the maximum engine speed.

[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 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] Acquire a first power consumption of the vehicle equipment; perform power matching according to the first power consumption and the output power curve;

[0073] The step of performing power matching according to the first power consumption and the output power curve includes:

[0074] Determine the first power consumption by acquiring the power consumption of the air conditioner, heater, and lighting and audio equipment in the vehicle;

[0075] matching a power interval on an output power curve according to the first power consumption;

[0076] The engine speed is adjusted through the power range on the output power curve, so that the torque generated by the engine can adapt to the NVH of the whole vehicle.

[0077] The control principle of the whole vehicle system in the present disclosure is to change the charging power setting strategy of the transmission vehicle based on speed avoidance, increase the engine torque output variable, and adjust the two variables of engine speed and torque to meet the vehicle's minimum charging power requirements.

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

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

[0080] The charging torque at different engine speeds is determined based on the vibration curves of the steering wheel and seat rails and the sound pressure level and order noise in the vehicle.

[0081] Based on the same inventive concept, the present disclosure also provides a plug-in hybrid vehicle idle charging power NVH matching device, see 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 meeting the charging power, and obtain the modal recognition result;

[0083] A speed excitation unit 202, used to adjust the engine idle speed interval to avoid the engine speed corresponding to the modal 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, the present disclosure also provides an electronic device 161, see Figure 3 , including 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] A memory 162 storing a computer program 163;

[0087] The processor 164 implements a hybrid vehicle charging power NVH matching method when executing the program stored in the memory 162 .

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

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

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

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

[0092] Based on the same inventive concept, the embodiment of the present disclosure further provides a computer-readable storage medium storing a computer program 163 . When the computer program 163 is executed by a processor 164 , a hybrid vehicle charging power NVH matching method is implemented.

[0093] The computer-readable storage medium may be included in the device / apparatus described in the above embodiment; or it may exist independently without being assembled into the device / apparatus. The above computer-readable storage medium carries one or more programs. When the above one or more programs are executed, a hybrid vehicle charging power NVH matching method according to an embodiment of the present disclosure is implemented.

[0094] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A hybrid vehicle charging power NVH matching method, characterized in that: include: Under the premise of vehicle idling and meeting the charging power, the NVH modal identification of the steering wheel and seat of the actual vehicle is carried out to obtain the modal identification results; Adjusting the engine idle speed range to avoid the engine speed corresponding to the modal recognition result; Within the adjusted engine idle speed range, determine the engine speed and torque corresponding to the optimal charging power.

2. The method according to claim 1, characterized in that The NVH modal identification of the actual vehicle steering wheel and seat is performed to obtain the modal identification result, including: Obtain the vibration values ​​of the steering wheel and seat of the actual vehicle to generate the vibration index; Among them, the vibration value of the steering wheel and the vibration value of the seat of the actual vehicle are values ​​obtained according to the vibration frequency of the vehicle under idling conditions.

3. The method according to claim 2, characterized in that The method further comprises: Acquire the in-vehicle noise frequency and the in-vehicle sound pressure level, and generate in-vehicle order noise according to the in-vehicle noise frequency; The idle charging power sound pressure level is determined according to the in-vehicle sound pressure level and the in-vehicle order noise.

4. The method according to claim 1, characterized in that The adjusting the engine idle speed range to avoid the engine speed corresponding to the modal recognition result includes: calibrating the speed range under the engine idle speed condition; The output power curve is generated by sweeping the power point of the vehicle through fixed engine speed excitation; Among them, the speed operating range of the engine under idle operation conditions is calibrated according to the power response under idle state and the electric power consumption.

5. The method according to claim 4, characterized in that The power response in the idle state includes: The engine output power provided by the engine for the vehicle's dynamic response when the vehicle is in operation.

6. The method according to claim 5, characterized in that The adjusting the engine idle speed interval to avoid the engine speed corresponding to the modal recognition result includes: adjusting the engine speed operation interval according to the modal recognition result, Among them, the modal frequency distribution table is generated according to the modal identification results. The engine speed operating range is adjusted according to the modal frequency distribution table within the range of the minimum engine speed and the maximum engine speed.

7. The method according to claim 6, characterized in that Determining the engine speed and torque corresponding to the optimal charging power within the adjusted engine idle speed range includes: Acquire a first power consumption of the vehicle equipment; perform power matching according to the first power consumption and the output power curve; The step of performing power matching according to the first power consumption and the output power curve includes: Determine the first power consumption by acquiring the power consumption of the air conditioner, heater, and lighting and audio equipment in the vehicle; matching a power interval on an output power curve according to the first power consumption; The engine operating speed is adjusted according to the power range on the output power curve.

8. A plug-in hybrid vehicle idle charging power NVH matching device, characterized in that: include: The modal identification unit is used to perform NVH modal identification on the steering wheel and seat of the actual vehicle under the premise of the vehicle idling condition and meeting the charging power, and obtain the modal identification result; A speed excitation unit, used for adjusting the engine idle speed range to avoid the engine speed corresponding to the modal 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.

9. An electronic device, characterized in that: include: A processor, a communication interface, a memory and a communication bus, wherein the processor, the communication interface and the memory communicate with each other via the communication bus; a memory storing a computer program; The processor, when executing the program stored in the memory, implements the hybrid vehicle charging power NVH matching method as described in any one of claims 1 to 7.

10. A computer-readable storage medium, characterized in that: A computer program is stored, and when the computer program is executed by a processor, a hybrid vehicle charging power NVH matching method as described in any one of claims 1 to 7 is implemented.

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