Rising control method and device of hybrid power vehicle, vehicle and storage medium

Abstract

The invention relates to the technical field of vehicles, in particular to a roar control method and device of a hybrid power vehicle, the vehicle and a storage medium, and the method comprises the following steps: obtaining an in-vehicle noise value of the hybrid power vehicle; if the in-vehicle noise value is greater than the roar threshold value, determining a target resonant frequency according to the engine speed; and determining a target rotating speed change slope and a target rotating speed adjustment interval of the engine according to the target resonant frequency, and controlling an in-vehicle noise value of the engine to be smaller than or equal to a roar threshold value according to the target rotating speed change slope and the target rotating speed adjustment interval. Therefore, the problem that in-vehicle roaring is caused by resonance generated by coupling with a vehicle body mode at a certain rotating speed during feed low-speed driving of the hybrid electric vehicle is solved.

Description

Technical Field

[0001] The present application relates to the field of vehicle technology, and in particular to a roar control method, device, vehicle and storage medium for a hybrid vehicle. Background Art

[0002] With the enhancement of environmental awareness and the development of technology, hybrid vehicles have gradually become an important part of the automobile market. Compared with traditional internal combustion engine vehicles, hybrid vehicles have significant advantages in energy saving and emission reduction. They can not only provide longer driving mileage, but also effectively reduce exhaust emissions.

[0003] In traditional internal combustion engine vehicles, the main task of the engine is to provide the driving force required for the vehicle to travel. When the vehicle is traveling at a low speed, the engine only needs to meet a smaller power demand, so its output power is relatively low. In addition, there is a fixed matching relationship between the engine speed and the gearbox ratio of traditional vehicles, which makes the engine speed basically unchanged within a certain range. This design simplifies the control system, but also limits the flexibility and efficiency of the engine.

[0004] Hybrid vehicles are different. When driving at low speeds, they not only need to meet the vehicle's driving force requirements, but also need to charge the onboard battery at the same time. This means that the engine must output higher power at lower speeds, which not only increases the engine load, but also causes the powertrain to significantly increase the excitation of the body structure. Especially at a certain speed, the engine's vibration frequency may couple with the body's natural modal frequency, causing resonance. This resonance will cause obvious second-order noise in the car, and its intensity may even exceed the hearing threshold of the human ear, seriously affecting the driving experience. Summary of the invention

[0005] The present application provides a hybrid vehicle roar control method, device, vehicle and storage medium to solve the problem that when the hybrid vehicle is powered and running at a low speed, it will resonate with the vehicle body mode coupling at a certain speed, causing roar in the vehicle.

[0006] A first aspect of the present application provides a method for controlling the roar of a hybrid vehicle, comprising the following steps: obtaining an interior noise value of the hybrid vehicle; if the interior noise value is greater than a roar threshold, determining a target resonance frequency according to the engine speed; determining a target speed change slope and a target speed adjustment range of the engine according to the target resonance frequency, and controlling the interior noise value of the engine to be less than or equal to the roar threshold according to the target speed change slope and the target speed adjustment range.

[0007] Optionally, determining the target resonance frequency according to the engine speed includes: calculating the excitation frequency of the engine according to the engine speed; and identifying the target resonance frequency that matches the excitation frequency in the resonance frequency data of the engine body.

[0008] Optionally, the target resonance frequency is the resonance frequency with the smallest difference from the excitation frequency in the resonance frequency data.

[0009] Optionally, determining the target speed change slope and target speed adjustment interval of the engine according to the target resonance frequency includes: obtaining the correspondence between the resonance frequency, the speed change slope and the speed adjustment interval; and determining the target speed change slope and target speed adjustment interval of the engine according to the target resonance frequency and the correspondence.

[0010] Optionally, before obtaining the correspondence between the resonant frequency, the speed change slope and the speed adjustment range, it also includes: calculating the corresponding resonant speed when the engine resonates with the vehicle body according to each resonant frequency; determining the speed change slope of the engine according to the resonant speed, determining the speed adjustment step of the resonant speed according to the two-hertz frequency avoidance principle, and generating the speed adjustment range according to the speed adjustment step and the resonant speed; generating the correspondence according to the resonant frequency, the speed change slope and the speed adjustment range.

[0011] Optionally, before generating a corresponding relationship according to the resonant frequency, the speed change slope and the speed adjustment interval, it also includes: identifying whether there are other resonant speeds in the speed adjustment interval; if it is identified that there are other resonant speeds in the speed adjustment interval, increasing the speed adjustment step; adjusting the speed adjustment interval according to the increased speed adjustment step until there are no other resonant speeds in the speed adjustment interval.

[0012] Optionally, before obtaining the interior noise value of the hybrid vehicle, the method further includes: obtaining a current driving mode of the hybrid vehicle; and if the current driving mode is a motor driving mode, obtaining the interior noise value of the hybrid vehicle.

[0013] A second aspect of the present application provides a roar control device for a hybrid vehicle, including: an acquisition module, used to acquire the in-vehicle noise value of the hybrid vehicle; a determination module, used to determine the target resonance frequency according to the engine speed if the in-vehicle noise value is greater than the roar threshold; a control module, used to determine the target speed change slope and target speed adjustment range of the engine according to the target resonance frequency, and control the in-vehicle noise value of the engine to be less than or equal to the roar threshold according to the target speed change slope and the target speed adjustment range.

[0014] A third aspect of the present application provides a vehicle, comprising: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the program to implement the roar control method for a hybrid vehicle of the first aspect.

[0015] The fourth aspect of the present application provides a computer-readable storage medium having a computer program or instruction stored thereon. When the computer program or instruction is executed, the roar control method of the hybrid vehicle of the first aspect is implemented.

[0016] Therefore, this application includes the following beneficial effects:

[0017] The embodiment of the present application can obtain the in-car noise value of the hybrid vehicle. If the in-car noise value is greater than the roar threshold, the target resonance frequency is determined according to the engine speed, the target speed change slope and the target speed adjustment range of the engine are determined, and the in-car noise value of the engine is controlled to be less than or equal to the roar threshold according to the target speed change slope and the target speed adjustment range. By decoupling the engine from the wheel end, the engine speed can be freely adjusted to avoid the body resonance frequency and reduce the in-car noise. In this way, the problem of resonance at a certain speed of hybrid electric vehicles feeding power and driving at low speeds, resulting in roaring in the car, is solved.

[0018] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0020] Figure 1 is a flow chart of a roar control method for a hybrid vehicle according to an embodiment of the present application;

[0021] Figure 2 This is a structural diagram of a hybrid vehicle low-speed roar monitoring device according to an embodiment of the present application;

[0022] Figure 3 is a working flow chart of a hybrid vehicle low-speed roar monitoring device according to an embodiment of the present application;

[0023] Figure 4 A control flow chart of a vehicle roar monitoring device according to an embodiment of the present application;

[0024] Figure 5 The engine speed and slope parameter control flow chart according to one embodiment of the present application;

[0025] Figure 6 is an exemplary diagram of a roar control device for a hybrid vehicle according to an embodiment of the present application;

[0026] Figure 7 It is a schematic diagram of the structure of a vehicle according to an embodiment of the present application. DETAILED DESCRIPTION

[0027] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present application, and should not be construed as limiting the present application.

[0028] The following describes the roar control method, device, vehicle and storage medium of the hybrid vehicle of the embodiment of the present application with reference to the accompanying drawings. In view of the problem mentioned in the above background technology that the hybrid vehicle will resonate with the vehicle body modal coupling at a certain speed when it is powered on and running at a low speed, causing roaring in the car, the present application provides a method for controlling the roar of a hybrid vehicle. In this method, by obtaining the in-car noise value of the hybrid vehicle, if the in-car noise value is greater than the roar threshold, the target resonance frequency is determined according to the engine speed, the target speed change slope and the target speed adjustment interval of the engine are determined, and the in-car noise value of the engine is controlled to be less than or equal to the roar threshold according to the target speed change slope and the target speed adjustment interval. By decoupling the engine from the wheel end, the engine speed is freely adjusted, the vehicle body resonance frequency is avoided, and the noise in the car is reduced. In this way, the problem that the hybrid vehicle will resonate with the vehicle body modal coupling at a certain speed when it is powered on and running at a low speed, causing roaring in the car, is solved.

[0029] Specifically, Figure 1 A schematic flow chart of a roar control method for a hybrid vehicle provided in an embodiment of the present application.

[0030] like Figure 1 As shown, the roar control method of the hybrid vehicle includes the following steps:

[0031] In step S101 , the vehicle interior noise value of the hybrid vehicle is acquired.

[0032] Among them, the in-vehicle noise value of the hybrid vehicle is collected through the in-vehicle microphone sensor.

[0033] It is understandable that the embodiments of the present application can collect the in-vehicle noise through the microphone sensor in the hybrid vehicle to obtain the in-vehicle noise value of the hybrid vehicle.

[0034] In the embodiment of the present application, before obtaining the interior noise value of the hybrid vehicle, it also includes: obtaining the current driving mode of the hybrid vehicle; if the current driving mode is the motor driving mode, obtaining the interior noise value of the hybrid vehicle.

[0035] Among them, in the motor drive mode, the engine not only needs to meet the driving force requirements, but also needs to charge the battery. At a certain speed, it will resonate with the body mode coupling, causing roaring in the car. Therefore, if the current drive mode is the motor drive mode, the interior noise value of the hybrid vehicle is obtained.

[0036] It is understandable that before obtaining the interior noise value of the hybrid vehicle, the embodiment of the present application needs to obtain the current driving mode of the hybrid vehicle. Only when the current driving mode is identified as the motor driving mode, the interior noise value of the hybrid vehicle is obtained.

[0037] In step S102, if the in-vehicle noise value is greater than the roar threshold, the target resonance frequency is determined according to the engine speed.

[0038] Among them, the roar threshold is a noise value set according to actual conditions. When the noise value inside the vehicle is greater than the roar threshold, it is judged that the vehicle has a roar. The roar threshold is not specifically limited here. Determining the target resonance frequency according to the engine speed will be described in detail below and will not be repeated here.

[0039] It can be understood that the embodiment of the present application obtains the interior noise value of the hybrid vehicle, compares the interior noise value with the roar threshold, and when the interior noise value is greater than the roar threshold, determines the target resonance frequency according to the engine speed.

[0040] In an embodiment of the present application, determining the target resonance frequency according to the engine speed includes: calculating the excitation frequency of the engine according to the engine speed; and identifying the target resonance frequency that matches the excitation frequency in the resonance frequency data of the engine body.

[0041] The engine speed can be obtained through the speed sensor; the engine excitation frequency is calculated using the engine speed, and the calculation formula is: is the excitation frequency, unit Hz; r is the engine speed, unit r / min; n is the order.

[0042] It can be understood that the embodiments of the present application can obtain the engine speed through the speed sensor, use the engine speed to calculate the engine excitation frequency, and after obtaining the engine excitation frequency, read the resonance frequency data of the vehicle body to find the target resonance frequency that matches the excitation frequency. The search method will be described in detail below and will not be repeated here.

[0043] In the embodiment of the present application, the target resonance frequency is the resonance frequency with the smallest difference from the excitation frequency in the resonance frequency data.

[0044] It can be understood that the embodiment of the present application calculates the excitation frequency of the engine through the above method, reads the resonance frequency data of the vehicle body after obtaining the excitation frequency of the engine, subtracts the resonance frequency data from the excitation frequency, and finds the resonance frequency with the smallest difference as the target resonance frequency.

[0045] In step S103, the target speed change slope and the target speed adjustment interval of the engine are determined according to the target resonance frequency, and the in-vehicle noise value of the engine is controlled to be less than or equal to the roar threshold according to the target speed change slope and the target speed adjustment interval.

[0046] Among them, the target speed change slope and the target speed adjustment range are determined by the target resonant frequency and the frequency avoidance principle. The frequency avoidance principle is an important strategy to reduce vibration and noise by adjusting the operating frequency to avoid resonance with the natural frequency of the structure.

[0047] It can be understood that the embodiment of the present application determines the target speed change slope and the target speed adjustment range through the target resonance frequency and the frequency avoidance principle, and by adjusting the speed change slope and the speed adjustment range to the target speed change slope and the target speed adjustment range, the engine's in-vehicle noise value is less than or equal to the roar threshold.

[0048] In an embodiment of the present application, the target speed change slope and the target speed adjustment interval of the engine are determined according to the target resonance frequency, including: obtaining the correspondence between the resonance frequency, the speed change slope and the speed adjustment interval; determining the target speed change slope and the target speed adjustment interval of the engine according to the target resonance frequency and the correspondence.

[0049] The corresponding relationship among the resonance frequency, the speed change slope and the speed adjustment range will be described in detail below and will not be repeated here.

[0050] It can be understood that the embodiment of the present application can calculate the corresponding speed change slope and speed adjustment range for each resonance frequency, and obtain the correspondence between the three. The target speed change slope and target speed adjustment range of the engine can be determined jointly through the correspondence and the target resonance frequency, thereby adjusting the speed change slope and speed adjustment range of the engine through the target speed change slope and the target speed adjustment range, so as to achieve the purpose of reducing the noise inside the vehicle and avoiding the roar inside the vehicle.

[0051] In an embodiment of the present application, before obtaining the correspondence between the resonant frequency, the speed change slope and the speed adjustment range, it also includes: calculating the corresponding resonant speed when the engine resonates with the vehicle body according to each resonant frequency; determining the speed change slope of the engine according to the resonant speed, determining the speed adjustment step of the resonant speed according to the two-hertz frequency avoidance principle, and generating a speed adjustment range according to the speed adjustment step and the resonant speed; generating a correspondence according to the resonant frequency, the speed change slope and the speed adjustment range.

[0052] Wherein, assuming the resonant speed of the engine at the resonant frequency is r1, according to the frequency avoidance principle, the speed adjustment step length of the resonant speed is r0=N*a, a is a constant, which is set according to the actual situation and is not specifically limited here, N is a constant 1, 2, 3...; the speed change slope The value range of y is [0.1,1]; the speed adjustment interval is generated according to the speed adjustment step and the resonant speed, and the interval is (r1-r0,r1+r0).

[0053] It can be understood that before obtaining the correspondence between the resonant frequency, the speed change slope and the speed adjustment range, the embodiment of the present application obtains the engine resonant speed corresponding to the current frequency through each resonant frequency, uses the engine resonant speed to obtain the speed adjustment step of the resonant speed, and uses the speed adjustment step of the resonant speed to calculate the engine speed change slope and the speed adjustment range to obtain the correspondence between the three.

[0054] In an embodiment of the present application, before generating a corresponding relationship according to the resonant frequency, the speed change slope and the speed adjustment interval, it also includes: identifying whether there are other resonant speeds in the speed adjustment interval; if it is identified that there are other resonant speeds in the speed adjustment interval, increasing the speed adjustment step; adjusting the speed adjustment interval according to the increased speed adjustment step until there are no other resonant speeds in the speed adjustment interval.

[0055] Among them, if there is still a resonance point in the speed regulation range, it is necessary to continue to increase the speed range, and then we get: r(x)∈(r1-r0-x,r1+r0+x), x is the speed value of the expanded speed range, generally a multiple of 10 10*N, and the unit is r / min.

[0056] It can be understood that before the embodiment of the present application generates a corresponding relationship according to the resonant frequency, the speed change slope and the speed adjustment interval, it is necessary to identify whether there are other resonant speeds in the speed adjustment interval. When it is identified that there are other resonant speeds in the speed adjustment interval, the speed adjustment step size is increased so that the speed adjustment step size is r0=r0+x, and the speed adjustment interval is adjusted using the increased speed adjustment step size until there are no other resonant speeds in the speed adjustment interval.

[0057] According to the roar control method for a hybrid vehicle proposed in an embodiment of the present application, by obtaining the interior noise value of the hybrid vehicle, if the interior noise value is greater than the roar threshold, the target resonance frequency is determined according to the engine speed, the target speed change slope and the target speed adjustment range of the engine are determined, and the interior noise value of the engine is controlled to be less than or equal to the roar threshold according to the target speed change slope and the target speed adjustment range. By decoupling the engine from the wheel end, the engine speed can be freely adjusted, the vehicle body resonance frequency is avoided, and the interior noise is reduced.

[0058] The following will be combined Figure 2 The hybrid vehicle low speed roar monitoring device shown further illustrates the hybrid vehicle roar control method, such as Figure 2 As shown, the hybrid vehicle low-speed roar monitoring device includes: S100 is a hybrid vehicle, S11 is a powertrain including a hybrid engine and a hybrid transmission, S12 is an in-vehicle microphone sensor, S13 is a communication module, S14 is a data analysis module, and S15 is a hybrid vehicle control module.

[0059] like Figure 3 As shown, the process of the hybrid vehicle roar control method includes: noise monitoring, frequency domain data analysis, engine speed reading, speed slope adjustment and hybrid vehicle control. The control process of the in-vehicle roar monitoring device and the engine speed and slope parameter control process will be described in detail below, as follows:

[0060] 1. If Figure 4 As shown, the control of the vehicle roar monitoring device includes the following steps:

[0061] Step S21, detecting the driving condition of the whole vehicle:

[0062] Monitor the vehicle's driving status, mainly speed information, driving mode information, etc.

[0063] Step S22: confirm whether there is roaring according to the noise information inside the vehicle:

[0064] According to the microphone sensor signal in the car, the noise P caused by the second-order excitation of the engine in the car is obtained. 2order (r), determine whether there is a roar in the vehicle, if there is no roar, proceed to step S21, if there is a roar, proceed to step S23.

[0065] Step S23, obtaining the engine speed information:

[0066] Get the engine speed information when roaring.

[0067] Step S24, determine the speed adjustment range:

[0068] Calculate the speed regulation range r(t)

[0069] Step S25, determine the speed change slope:

[0070] The speed change slope within the speed regulation range is increased by gain to improve the speed change slope Δr(t).

[0071] Step S26, determining whether there is roar in the vehicle:

[0072] Determine whether there is a roar in the vehicle, and if so, return to step S24; if not, proceed to step S27.

[0073] Step S27, controlling the engine to run at the target speed slope.

[0074] 2. If Figure 5 As shown, the engine speed and slope parameter control process includes the following steps:

[0075] Step S31, calculating the frequency corresponding to the second-order excitation according to the engine speed:

[0076] The frequency corresponding to the second-order excitation of the engine is calculated as:

[0077]

[0078] In the formula, f n (r) is the excitation frequency, in Hz; r is the engine speed, in r / min; n is the order, and the corresponding second-order excitation of the engine is n=2;

[0079] Step S32: determine whether the second-order excitation is equal to the resonant frequency of the vehicle body structure mode:

[0080] When the frequency f of a part of the vehicle body body With f n (r) are equal, a "buzzing" low-frequency noise will appear in the car, causing consumers to experience discomfort such as dizziness and tinnitus. At this time, the engine speed is r1. If it is equal, proceed to step S33, if not equal, proceed to step S31.

[0081] Step S33, calculating the engine speed regulation interval:

[0082] Calculate the speed regulation range. According to the frequency avoidance principle, the speed needs to be adjusted to r0 = N * 30, so the speed regulation range is:

[0083] (r1-60,r1+60)……(2)

[0084] Where N is a constant 1, 2, 3…; generally it is preset to 2Hz;

[0085] Step S34: determine whether the speed regulation interval contains the vehicle body resonance frequency:

[0086] It is determined whether there is still a resonance point in the speed regulation range. If not, proceed to step S35; if it exists, it is generally due to factors such as engine speed fluctuation and vehicle production consistency, and the speed range needs to be further increased. Return to step S33 and increase the speed range, that is:

[0087] r(x)∈(r1-60-x,r1+60+x)……(3)

[0088] In the formula, x is the speed value of the expanded speed range, which is generally a multiple of 10 10*N, and the unit is r / min;

[0089] Step S35, determine the speed regulation interval and speed slope:

[0090] Adjust the speed change slope, the slope is:

[0091]

[0092] In the formula, the value range of y is [0.1,1];

[0093] Step S36: Determine whether the noise corresponding to the second-order excitation in the vehicle meets the standard:

[0094] To determine whether there is a roar in the car, based on the subjective feelings of the human body and multiple objective test values, the second-order noise in the car needs to meet the following requirements:

[0095] P 2order (r)≤38……(5)

[0096] Where P 2order (r) is the noise caused by the second-order excitation of the engine in the vehicle, in dB(A); if the target of formula (5) is not satisfied, adjust the value of (x, y) and return to step S34; if it is satisfied, proceed to step S37;

[0097] Step S37, taking the speed slope and speed regulation range after gain as the target:

[0098] Output speed variation range r(x) and slope Δr(y).

[0099] Next, the roar control device of a hybrid vehicle proposed in accordance with an embodiment of the present application will be described with reference to the accompanying drawings.

[0100] Figure 6 It is a block diagram of a roar control device for a hybrid vehicle according to an embodiment of the present application.

[0101] like Figure 6 As shown, the roar control device 10 of the hybrid vehicle includes: an acquisition module 501 , a determination module 502 and a control module 503 .

[0102] Among them, the acquisition module 501 is used to obtain the in-vehicle noise value of the hybrid vehicle; the determination module 502 is used to determine the target resonance frequency according to the engine speed if the in-vehicle noise value is greater than the roar threshold; the control module 503 is used to determine the target speed change slope and the target speed adjustment range of the engine according to the target resonance frequency, and control the in-vehicle noise value of the engine to be less than or equal to the roar threshold according to the target speed change slope and the target speed adjustment range.

[0103] In the embodiment of the present application, the determination module 502 is further used to: calculate the excitation frequency of the engine according to the engine speed; and identify the target resonance frequency that matches the excitation frequency in the resonance frequency data of the engine body.

[0104] In the embodiment of the present application, the target resonance frequency is the resonance frequency with the smallest difference from the excitation frequency in the resonance frequency data.

[0105] In the embodiment of the present application, the control module 503 is further used to: obtain the correspondence between the resonant frequency, the speed change slope and the speed adjustment range; and determine the target speed change slope and the target speed adjustment range of the engine according to the target resonant frequency and the correspondence.

[0106] In an embodiment of the present application, before obtaining the correspondence between the resonant frequency, the speed change slope and the speed adjustment range, it also includes: calculating the corresponding resonant speed when the engine resonates with the vehicle body according to each resonant frequency; determining the speed change slope of the engine according to the resonant speed, determining the speed adjustment step of the resonant speed according to the two-hertz frequency avoidance principle, and generating a speed adjustment range according to the speed adjustment step and the resonant speed; generating a correspondence according to the resonant frequency, the speed change slope and the speed adjustment range.

[0107] In an embodiment of the present application, before generating a corresponding relationship according to the resonant frequency, the speed change slope and the speed adjustment interval, it also includes: identifying whether there are other resonant speeds in the speed adjustment interval; if it is identified that there are other resonant speeds in the speed adjustment interval, increasing the speed adjustment step; adjusting the speed adjustment interval according to the increased speed adjustment step until there are no other resonant speeds in the speed adjustment interval.

[0108] In the embodiment of the present application, before obtaining the interior noise value of the hybrid vehicle, it also includes: obtaining the current driving mode of the hybrid vehicle; if the current driving mode is the motor driving mode, obtaining the interior noise value of the hybrid vehicle.

[0109] It should be noted that the above explanation of the embodiment of the roar control method of a hybrid vehicle is also applicable to the roar control device of a hybrid vehicle of this embodiment, and will not be repeated here.

[0110] According to the roar control device of a hybrid vehicle proposed in the embodiment of the present application, the interior noise value of the hybrid vehicle is obtained. If the interior noise value is greater than the roar threshold, the target resonance frequency is determined according to the engine speed, and the target speed change slope and target speed adjustment range of the engine are determined. According to the target speed change slope and the target speed adjustment range, the interior noise value of the engine is controlled to be less than or equal to the roar threshold. By decoupling the engine from the wheel end, the engine speed can be freely adjusted, the vehicle body resonance frequency is avoided, and the interior noise is reduced.

[0111] Figure 7 A schematic diagram of the structure of a vehicle provided in an embodiment of the present application. The vehicle may include:

[0112] A memory 601 , a processor 602 , and a computer program stored in the memory 601 and executable on the processor 602 .

[0113] When the processor 602 executes the program, the roar control method of the hybrid vehicle provided in the above embodiment is implemented.

[0114] Furthermore, the vehicle also includes:

[0115] The communication interface 603 is used for communication between the memory 601 and the processor 602 .

[0116] The memory 601 is used to store computer programs that can be executed on the processor 602 .

[0117] The memory 601 may include a high-speed RAM (Random Access Memory) memory, and may also include a non-volatile memory, such as at least one disk memory.

[0118] If the memory 601, the processor 602 and the communication interface 603 are implemented independently, the communication interface 603, the memory 601 and the processor 602 can be connected to each other through a bus and communicate with each other. The bus can be an ISA (Industry Standard Architecture) bus, a PCI (Peripheral Component Interconnect) bus or an EISA (Extended Industry Standard Architecture) bus, etc. The bus can be divided into an address bus, a data bus, a control bus, etc. For ease of representation, Figure 7 Only one thick line is used in the diagram, but this does not mean that there is only one bus or only one type of bus.

[0119] Optionally, in a specific implementation, if the memory 601, the processor 602 and the communication interface 603 are integrated on a chip, the memory 601, the processor 602 and the communication interface 603 can communicate with each other through an internal interface.

[0120] The processor 602 may be a CPU (Central Processing Unit), or an ASIC (Application Specific Integrated Circuit), or one or more integrated circuits configured to implement the embodiments of the present application.

[0121] The embodiment of the present application also provides a computer-readable storage medium on which a computer program or instruction is stored. When the computer program or instruction is executed, the roar control method of the hybrid vehicle mentioned above is implemented.

[0122] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms are not necessarily directed to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or N embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0123] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, "N" means at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0124] Any process or method description in a flowchart or otherwise described herein may be understood to represent a module, fragment or portion of code comprising one or N executable instructions for implementing the steps of a custom logical function or process, and the scope of the preferred embodiments of the present application includes alternative implementations in which functions may not be performed in the order shown or discussed, including performing functions in a substantially simultaneous manner or in reverse order depending on the functions involved, which should be understood by technicians in the technical field to which the embodiments of the present application belong.

[0125] It should be understood that the various parts of the present application can be implemented in hardware, software, firmware or a combination thereof. In the above-mentioned embodiments, the steps or methods can be implemented in software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, it can be implemented by any one of the following technologies known in the art or their combination: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, a dedicated integrated circuit having a suitable combination of logic gate circuits, a programmable gate array, a field programmable gate array, etc.

[0126] A person of ordinary skill in the art may understand that all or part of the steps carried by the method for implementing the above-mentioned embodiment may be completed by instructing related hardware through a program, and the above-mentioned program may be stored in a computer-readable storage medium, which, when executed, includes one of the steps of the method embodiment or a combination thereof.

[0127] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A method for controlling roar of a hybrid vehicle, characterized in that: The following steps are involved: Obtaining the interior noise value of a hybrid vehicle; If the in-vehicle noise value is greater than the roar threshold, determining a target resonance frequency according to the engine speed; The target speed change slope and the target speed adjustment interval of the engine are determined according to the target resonance frequency, and the in-vehicle noise value of the engine is controlled to be less than or equal to the roar threshold according to the target speed change slope and the target speed adjustment interval.

2. The method for controlling roar of a hybrid vehicle according to claim 1, characterized in that: Determining the target resonance frequency according to the engine speed includes: calculating an excitation frequency of the engine according to the engine speed; A target resonance frequency to which the excitation frequency matches is identified in the resonance frequency data of the engine body.

3. The method for controlling roar of a hybrid vehicle according to claim 2, characterized in that: The target resonance frequency is a resonance frequency in the resonance frequency data that has the smallest difference with the excitation frequency.

4. The method for controlling roar of a hybrid vehicle according to claim 1, characterized in that: The step of determining the target speed change slope and the target speed adjustment interval of the engine according to the target resonance frequency includes: Obtaining the corresponding relationship between the resonant frequency, the speed change slope and the speed adjustment range; The target speed change slope and the target speed adjustment interval of the engine are determined according to the target resonance frequency and the corresponding relationship.

5. The method for controlling roar of a hybrid vehicle according to claim 4, characterized in that: Before obtaining the corresponding relationship between the resonant frequency, the speed change slope and the speed adjustment range, it also includes: Calculating the corresponding resonant speed of the engine when it resonates with the vehicle body according to each resonant frequency; Determining a speed change slope of the engine according to the resonant speed, determining a speed adjustment step length of the resonant speed according to a two-hertz frequency avoidance principle, and generating a speed adjustment interval according to the speed adjustment step length and the resonant speed; The corresponding relationship is generated according to the resonance frequency, the rotation speed change slope and the rotation speed adjustment interval.

6. The method for controlling roar of a hybrid vehicle according to claim 5, characterized in that: Before generating the corresponding relationship according to the resonant frequency, the speed change slope and the speed adjustment interval, the method further includes: Identify whether there are other resonant speeds in the speed adjustment interval; If it is identified that there are other resonant speeds in the speed adjustment interval, increasing the speed adjustment step size; The speed adjustment interval is adjusted according to the increased speed adjustment step length until no other resonant speeds exist in the speed adjustment interval.

7. The method for controlling roar of a hybrid vehicle according to claim 1, characterized in that: Before obtaining the interior noise value of a hybrid vehicle, it also includes: acquiring a current driving mode of the hybrid vehicle; If the current driving mode is the motor driving mode, the interior noise value of the hybrid vehicle is obtained.

8. A roar control device for a hybrid vehicle, characterized in that: include: An acquisition module, used for acquiring a noise value inside a hybrid vehicle; a determination module, configured to determine a target resonance frequency according to an engine speed if the in-vehicle noise value is greater than a roar threshold; A control module is used to determine a target speed change slope and a target speed adjustment interval of the engine according to the target resonance frequency, and control the in-vehicle noise value of the engine to be less than or equal to the roar threshold according to the target speed change slope and the target speed adjustment interval.

9. A vehicle, characterized in that: include: A memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the program to implement the roar control method for a hybrid vehicle according to any one of claims 1 to 7.

10. A computer-readable storage medium having a computer program or instruction stored thereon, characterized in that: When the computer program or instruction is executed, the roar control method of the hybrid vehicle according to any one of claims 1 to 7 is implemented.

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