Calibration method and device for improving working noise of range extender

Abstract

The application provides a calibration method and device for improving working noise of a range extender. The method comprises: acquiring in-vehicle noise signal data and range extender vibration signal data when the range extender is working; performing angle domain analysis on the in-vehicle noise signal data and the range extender vibration signal data to obtain an angle domain analysis result; determining a target cylinder in the range extender that causes knocking noise of a crankshaft system according to the angle domain analysis result; acquiring a target retardation angle, and calibrating an ignition advance angle of the target cylinder according to the target retardation angle. Without affecting the overall performance of the range extender, by retarding the ignition advance angle of a certain cylinder, the burst pressure of the certain cylinder can be reduced, the excitation force acting on the crankshaft system of the range extender can be reduced from the source, and thus the knocking noise of the crankshaft system of the range extender can be improved, and the sound quality inside the vehicle can be improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of automobiles, and in particular to a calibration method and device for improving working noise of a range extender, an electronic device, and a storage medium. BACKGROUND

[0002] As an important noise source of a range-extended electric vehicle, the NVH (Noise, Vibration, Harshness) performance of the range extender directly determines the NVH quality of the vehicle.

[0003] In order to improve the working noise of the range extender, most solutions start from the hardware of the range extender itself to optimize the knocking noise of the crankshaft system, which has the disadvantages of long optimization period, high cost, and unsatisfactory optimization effect. SUMMARY

[0004] The present application provides a calibration method and device for improving working noise of a range extender, an electronic device, and a storage medium, to improve the working noise of the range extender without affecting the performance of the whole machine. The technical solutions of the present application are as follows:

[0005] In a first aspect, the present application provides a calibration method for improving working noise of a range extender, comprising:

[0006] obtaining in-vehicle noise signal data and range extender vibration signal data when the range extender is working;

[0007] performing angle domain analysis on the in-vehicle noise signal data and the range extender vibration signal data to obtain an angle domain analysis result;

[0008] determining a target cylinder in the range extender that causes knocking noise of a crankshaft system according to the angle domain analysis result;

[0009] obtaining a target retardation angle, and calibrating an ignition advance angle of the target cylinder according to the target retardation angle.

[0010] In a second aspect, the present application provides a calibration device for improving working noise of a range extender, comprising:

[0011] a noise data acquisition module configured to obtain in-vehicle noise signal data and range extender vibration signal data when the range extender is working;

[0012] an angle domain analysis module configured to perform angle domain analysis on the in-vehicle noise signal data and the range extender vibration signal data to obtain an angle domain analysis result;

[0013] a target cylinder determination module configured to determine a target cylinder in the range extender that causes knocking noise of a crankshaft system according to the angle domain analysis result;

[0014] The ignition angle calibration module is configured to obtain a target retardation angle, and calibrate an ignition advance angle of the target cylinder according to the target retardation angle.

[0015] In a third aspect, an electronic device is provided, including: at least one processor; and a memory communicatively connected to the at least one processor; wherein the memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor to enable the at least one processor to perform the calibration method for improving working noise of a range extender according to the first aspect of the present application.

[0016] In a fourth aspect, a non-transitory computer-readable storage medium storing computer instructions is provided, and the computer instructions are used to enable a computer to perform the calibration method for improving working noise of a range extender according to the first aspect of the present application.

[0017] In a fifth aspect, a computer program product is provided, including computer instructions, and the computer instructions are executed by a processor to implement steps of the calibration method for improving working noise of a range extender according to the first aspect of the present application.

[0018] The technical solutions provided in the embodiments of the present application at least bring the following beneficial effects:

[0019] The in-vehicle noise signal data and the range extender vibration signal data are acquired, and angle domain analysis is performed; according to the angle domain analysis result, a target cylinder causing the knocking noise of the crankshaft system is determined; and then the ignition advance angle of the target cylinder is calibrated according to a target retardation angle. Without affecting the overall performance of the range extender, by retarding the ignition advance angle of a certain cylinder, the burst pressure of the certain cylinder can be reduced, the excitation force acting on the range extender crankshaft system can be reduced from the source, and thus the knocking noise of the range extender crankshaft system can be improved, and the sound quality inside the vehicle can be improved.

[0020] It should be understood that the foregoing general description and the following detailed description are only exemplary and explanatory, and cannot limit the present application. BRIEF DESCRIPTION OF DRAWINGS

[0021] The accompanying drawings, which are incorporated into and form part of the specification, illustrate embodiments consistent with the present application and, together with the specification, serve to explain the principles of the present application, and do not constitute an undue limitation on the present application.

[0022] Figure 1 is a flowchart of a calibration method for improving working noise of a range extender according to an exemplary embodiment.

[0023] Figure 2 is a structural schematic diagram of a range extender crankshaft system.

[0024] Figure 3 is a flow chart of a calibration method for improving working noise of a range extender according to an example embodiment.

[0025] Figure 4 is a block diagram of a calibration device for improving working noise of a range extender according to an example embodiment.

[0026] Figure 5 is a block diagram of an electronic device according to an example embodiment.

[0027] In the drawings:

[0028] 1, crankshaft torsional damper; 2, range extender piston; 3, range extender connecting rod; 4, range extender crankshaft; 5, range extender flywheel. DETAILED DESCRIPTION

[0029] In order for those skilled in the art to better understand the technical solutions of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings.

[0030] It should be noted that the terms "first", "second", and the like in the present application are used to distinguish similar objects, and do not necessarily indicate a specific order or a chronological sequence. It should be understood that the data thus used can be interchanged under appropriate circumstances, so that the embodiments of the present application described herein can be implemented in an order other than that illustrated or described herein. The embodiments described in the following exemplary embodiments do not represent all the embodiments consistent with the present application. Rather, they are merely examples of devices and methods consistent with some aspects of the present application as detailed in the appended claims.

[0031] NVH, an English abbreviation for Noise, Vibration, and Harshness. It is a comprehensive problem for measuring the quality of automobile manufacturing, which gives the most direct and superficial feeling to the users of the automobile.

[0032] Figure 1 is a flow chart of a calibration method for improving working noise of a range extender according to an example embodiment. It should be noted that the calibration method for improving working noise of a range extender of the embodiments of the present application can be applied to the calibration device for improving working noise of a range extender of the embodiments of the present application. The calibration device for improving working noise of a range extender can be configured on an electronic device. As shown in Figure 1 the calibration method for improving working noise of a range extender can include the following steps.

[0033] In step S101, the in-vehicle noise signal data and the range extender vibration signal data during the working of the range extender are acquired.

[0034] It is understandable that in order to improve the operating noise of the range extender, it is necessary to obtain in-vehicle noise signal data and range extender vibration signal data when the range extender is working. Only by analyzing the in-vehicle noise signal data and range extender vibration signal data can the source of noise be found based on the analysis results, thereby improving the noise.

[0035] The data to be analyzed in this embodiment of the application are in-vehicle noise signal data and range extender vibration signal data.

[0036] It should be noted that, depending on the type of range extender, the type of vehicle, and the operating conditions of the range extender, there are multiple options for the range extender vibration signal data. As an example, the range extender vibration signal data can be selected from the vibration data of the main bearing housing of the cylinder block, or the vibration data of the crankshaft system, etc.

[0037] In step S102, angular domain analysis is performed on the in-vehicle noise signal data and the range extender vibration signal data to obtain the angular domain analysis results.

[0038] It should be noted that angle domain analysis correlates the signal with a reference rotation angle, completing the conversion from time domain signal to angle domain signal, and corresponding the angle domain data according to the system's periodic characteristics. By applying angle domain analysis to in-vehicle noise signal data and range extender vibration signal data, and corresponding analysis with the operating cycle timing diagram of the range extender engine, the root cause of noise can be accurately identified.

[0039] In step S103, based on the angle domain analysis results, the target cylinder in the range extender that causes knocking noise in the crankshaft system is determined.

[0040] It should be noted that the knocking noise caused by the crankshaft system during idling or acceleration is a significant source of noise in the range extender. The knocking excitation of the crankshaft system mainly originates from the excitation torque generated by the periodic changes in gas pressure within the cylinder during the combustion process of the range extender.

[0041] like Figure 2 As shown, the explosion pressure generated during the operation of the range extender combustion system acts on piston 2, and through connecting rod 3 acts on the crankshaft system composed of torsional damper 1, crankshaft 4, flywheel 5, etc., causing torsional and bending vibrations of the crankshaft system. The torsional and bending vibrations of the crankshaft system also act on the main bearing housing, causing repeated knocking between crankshaft 4 and main bearing housing and radiating through the range extender body.

[0042] In other words, the excitation torque is transmitted to the crankshaft through the piston and connecting rod, causing torsional and bending vibrations of the crankshaft system, which consists of a torsional damper, crankshaft, flywheel, etc. The bending and torsional vibrations of the crankshaft system act on the main bearing housing at the same time, causing repeated knocking between the crankshaft and the main bearing housing and radiating through the range extender body.

[0043] According to the NVH analysis method of the noise source-transmission path-response, in order to effectively improve the knocking noise of the crankshaft system, it is necessary to reduce the excitation of the excitation source, that is, to reduce the explosion pressure acting on the piston top.

[0044] It also needs to be explained that through testing, the source causing the knocking noise of the crankshaft system is mainly from one cylinder of the range extender, not all cylinders. Because the designs of different engines are different, according to the different structural designs of the range extender engine, it is not necessarily which cylinder, for example, it can be the cylinder close to the flywheel or the cylinder close to the front.

[0045] The embodiment of the present application accurately finds out the target cylinder causing the knocking noise of the crankshaft system in the range extender through the angular domain analysis of the noise signal data or vibration signal data related to the range extender. That is, through the angular domain analysis of the noise signal data or vibration signal data related to the range extender, a certain cylinder causing the knocking noise of the crankshaft system in the engine is determined.

[0046] It needs to be explained that through the related noise test of the engine of the range extender, it can be determined that the main source causing the knocking noise of the crankshaft system is from a certain cylinder of the engine.

[0047] In step S104, a target retardation angle is obtained, and the ignition advance angle of the target cylinder is calibrated according to the target retardation angle.

[0048] It needs to be explained that in order to improve the knocking noise of the crankshaft system of the range extender from the excitation source, the ignition advance angle of the target cylinder determined through the above steps can be retarded through the cylinder-specific ignition function, the explosion pressure of the target cylinder is reduced, the excitation force acting on the crankshaft system of the range extender is reduced from the source, the knocking noise of the crankshaft system of the range extender is improved, the sound quality in the vehicle is improved, and the overall performance of the range extender is not affected. Therefore, in order to implement the calibration method of the present application, the underlying software needs to have the cylinder-specific ignition function.

[0049] It needs to be explained that the ignition advance angle is the angle through which the crankshaft rotates from the ignition time to the time when the piston reaches the compression top dead center. By retarding the ignition advance angle of the target cylinder, the working noise of the range extender can be improved.

[0050] It also needs to be said that the target retardation angle, that is, the retardation angle of the ignition advance angle of the target cylinder, can be fine-tuned according to engineering needs, and is generally between 1 degree and 2 degrees.

[0051] The calibration method for improving the working noise of the range extender provided in the embodiments of the present application acquires the in-vehicle noise signal data and the range extender vibration signal data, and performs angle domain analysis; according to the angle domain analysis result, the target cylinder causing the knocking noise of the crankshaft system is determined; and then the ignition advance angle of the target cylinder is calibrated according to the target retardation angle. Without affecting the overall performance of the range extender, by retarding the ignition advance angle of a certain cylinder, the burst pressure of the certain cylinder can be reduced, the excitation force acting on the range extender crankshaft system is reduced from the source, and thus the knocking noise of the range extender crankshaft system can be improved, and the sound quality inside the vehicle is improved.

[0052] On the basis of the above embodiments, Figure 3 is a flowchart of the calibration method for improving the working noise of the range extender according to an embodiment of the present application. As shown in Figure 3 The calibration method for improving the working noise of the range extender can include the following steps.

[0053] In step S301, the in-vehicle noise signal data and the range extender vibration signal data during the working of the range extender are acquired.

[0054] The range extender vibration signal data in the embodiments of the present application is the vibration signal data of the main bearing seat of the range extender cylinder block, which can be collected by the vibration sensor installed on the main bearing seat of the range extender cylinder block.

[0055] The in-vehicle noise signal data during the working of the range extender collected by the in-vehicle microphone is acquired in the embodiments of the present application. As an example, the microphone can be arranged at a suitable position on the intake side or the exhaust side of the range extender engine.

[0056] In step S302, the angle reference point for angle domain analysis of the range extender is determined.

[0057] It can be understood that the acquired in-vehicle noise signal data and range extender vibration signal data are time domain signals, and in order to perform angle domain analysis, the in-vehicle noise signal data and the range extender vibration signal data need to be converted into angle domain data first. In order to convert into angle domain signals, an angle reference point is needed, which can be understood as a reference 0 point. According to the angle reference point, the data corresponding to the time domain signal in the angle domain is obtained, that is, the rotation angle value of the object to be analyzed is determined according to the reference 0 point.

[0058] The angle reference point in the embodiments of the present application is the compression top dead center of the first cylinder of the range extender.

[0059] The cylinder pressure signal is collected in the embodiments of the present application, which is used to define the compression top dead center of the first cylinder of the range extender, and the compression top dead center of the first cylinder is determined for angle domain analysis.

[0060] It should be noted that there are many ways to determine the first cylinder compression top dead center, which can be determined by the cylinder pressure signal, and the flywheel speed signal and the camshaft speed signal of the engine can also be used to determine the first cylinder compression top dead center, and the internal signal of the engine can also be used to determine the first cylinder compression top dead center, which can be a missing tooth signal.

[0061] For example, there are sixty teeth on the flywheel, and two teeth are intentionally missing, and this missing tooth structure is used to confirm the top dead center. For example, the 21st tooth of the missing tooth signal corresponds to the first cylinder compression top dead center, but the missing tooth signal needs to be matched with the camshaft signal. The camshaft speed can be collected by the camshaft speed sensor, and the flywheel speed can be collected by the flywheel speed sensor.

[0062] Optionally, the method for determining the angle reference point of the range extender for angle domain analysis comprises:

[0063] Obtaining the cylinder pressure signal of the first cylinder of the vehicle;

[0064] Determining the point corresponding to the maximum value in the cylinder pressure signal as the compression top dead center of the first cylinder;

[0065] Determining the compression top dead center of the first cylinder as the angle reference point of the range extender for angle domain analysis.

[0066] The embodiment of the application can determine the first cylinder compression top dead center according to the cylinder pressure signal. A cylinder pressure sensor is installed on each cylinder of the engine on the engine bench, and the cylinder pressure signal of each cylinder is collected by the cylinder pressure sensor. The cylinder pressure signal of the first cylinder is collected by the cylinder pressure sensor installed on the first cylinder, which is similar to a sine curve, and the maximum pressure point is found according to the sine curve, which corresponds to the first cylinder compression top dead center. The accuracy of determining the first cylinder compression top dead center by the cylinder pressure sensor is high.

[0067] In step S303, based on the angle reference point, the in-vehicle noise signal data and the range extender vibration signal data are analyzed in the angle domain to obtain an angle domain analysis result.

[0068] In the embodiment of the application, based on the angle reference point, the in-vehicle noise signal data and the range extender vibration signal data are converted into angle domain data; the angle domain data is analyzed in the angle domain to obtain an angle domain analysis result.

[0069] That is, based on the angle reference point, the noise time domain signal data is converted into noise angle domain signal data, and the vibration time domain signal data is converted into vibration angle domain signal data.

[0070] The angle domain data can be analyzed in the angle domain by angle domain analysis software, for example, PEST.Lib, etc.

[0071] In step S304, according to the angle domain analysis result, the targeted cylinder causing the knocking noise of the crankshaft system in the range extender is determined.

[0072] Optionally, the method for determining the targeted cylinder comprises:

[0073] According to the angle domain analysis result, the peak value of the angle domain signal of each cylinder of the engine is obtained.

[0074] According to the peak value of the angle domain signal of each cylinder, the targeted cylinder causing the knocking noise of the crankshaft system in the range extender is determined.

[0075] As an example, the angle domain analysis result is a curve with the horizontal axis being the angle and the vertical axis being the amplitude of the vibration or noise, which is the result of the joint action of all the cylinders. The peak value of the amplitude can be determined, and according to the angle corresponding to the peak value, the targeted cylinder causing the knocking noise of the crankshaft system in the range extender is determined, which is considered as the main source causing the knocking noise of the crankshaft system. Because the impact noise will cause a large amplitude, the amplitude should be the largest at a certain angle, for example, for a four-cylinder four-stroke engine, the working cycle of the engine is 720 degrees, including the intake, compression, work and exhaust processes. If the compression is 0 degrees, then 180 degrees is a point, and the process is intake, compression, work and then intake. According to the process and angle, it can be determined whether the largest amplitude corresponds to the intake stroke or the compression stroke, for example, the compression stroke. Because the ignition sequence of the engine is 1, 3, 4, 2, according to the ignition sequence, it can be determined which cylinder of the four cylinders is compressing, thereby determining the targeted cylinder.

[0076] It should be further noted that according to the angle domain analysis result, the rotation angle at the time of noise occurrence relative to the reference 0 point is found, and combined with the engine working cycle timing diagram, it is determined whether the rotation angle corresponds to the angle of the intake stroke or the exhaust stroke, for example, a certain angle after the compression stroke. According to the angle, it can be determined which moving part is moving at which position, thereby accurately determining the moving part that produces the noise, and determining the cylinder to which the piston belongs; wherein the moving part can be a piston, a connecting rod, etc.

[0077] It should be further noted that the engine working cycle timing diagram can be obtained according to the camshaft speed signal and the flywheel speed signal. Therefore, the camshaft speed signal and the flywheel speed signal need to be obtained.

[0078] In step S305, the target retardation angle is determined, and the ignition advance angle of the targeted cylinder is calibrated according to the target retardation angle.

[0079] It should be noted that in the embodiments of the present application, the implementation process of step S305 can refer to the description of the implementation process of step S104, and will not be repeated here.

[0080] The calibration method for improving the working noise of the range extender provided in the embodiments of the present application acquires the in-vehicle noise signal data and the range extender vibration signal data, and then acquires the cylinder pressure signal, and determines the angle reference point according to the cylinder pressure signal. Based on the angle reference point, the in-vehicle noise signal data and the range extender vibration signal data are analyzed in the angle domain; according to the angle domain analysis result, the target cylinder causing the knocking noise of the crankshaft system is determined; and then the ignition advance angle of the target cylinder is calibrated according to the target retardation angle. Without affecting the overall performance of the range extender, by retarding the ignition advance angle of a certain cylinder, the burst pressure of the cylinder can be reduced, the excitation force acting on the crankshaft system of the range extender can be reduced from the source, and thus the knocking noise of the crankshaft system of the range extender can be improved, and the sound quality inside the vehicle can be improved. The method also has the characteristics of low cost, strong universality, simple implementation, etc.

[0081] Corresponding to the embodiments of the calibration method for improving the working noise of the range extender, Figure 4 is a block diagram of a calibration device for improving the working noise of the range extender according to an example embodiment. Referring to Figure 4 The calibration device for improving the working noise of the range extender can include a noise data acquisition module 401, an angle domain analysis module 402, a target cylinder determination module 403, and an ignition angle calibration module 404.

[0082] Specifically, the noise data acquisition module 401 is configured to acquire in-vehicle noise signal data and range extender vibration signal data when the range extender is working;

[0083] The angle domain analysis module 402 is configured to analyze the in-vehicle noise signal data and the range extender vibration signal data in the angle domain to obtain an angle domain analysis result.

[0084] The target cylinder determination module 403 is configured to determine, according to the angle domain analysis result, a target cylinder in the range extender that causes the knocking noise of the crankshaft system.

[0085] The ignition angle calibration module 404 is configured to acquire a target retardation angle, and calibrate the ignition advance angle of the target cylinder according to the target retardation angle.

[0086] In some embodiments of the present application, the angle domain analysis module 402 is configured to:

[0087] determine an angle reference point of the range extender for angle domain analysis;

[0088] convert the in-vehicle noise signal data and the range extender vibration signal data into angle domain data based on the angle reference point;

[0089] perform angle domain analysis on the angle domain data to obtain an angle domain analysis result.

[0090] In some embodiments of the present application, the angle domain analysis module 402, when determining the angle reference point of the range extender for angle domain analysis, is configured to:

[0091] obtain a cylinder pressure signal of a first cylinder of the vehicle;

[0092] determine a point corresponding to the maximum value in the cylinder pressure signal as a compression top dead center of the first cylinder;

[0093] determine the compression top dead center of the first cylinder as the angle reference point of the range extender for angle domain analysis.

[0094] In some embodiments of the present application, the target cylinder determination module 403 is configured to:

[0095] obtain peak values of angle domain signals of each cylinder of the engine according to the angle domain analysis result;

[0096] determine a target cylinder in the range extender that causes the knocking noise of the crankshaft system according to the peak values of the angle domain signals of each cylinder.

[0097] In some embodiments of the present application, the ignition angle calibration module 404 is configured to:

[0098] obtain a target retardation angle, and calculate an angle difference between the ignition advance angle of the target cylinder and the target retardation angle;

[0099] calibrate the ignition advance angle of the target cylinder according to the angle difference.

[0100] In some embodiments of the present application, the noise data obtaining module 401, when obtaining the in-vehicle noise signal data of the range extender, is configured to:

[0101] obtain in-vehicle noise signal data of the range extender collected by an in-vehicle microphone.

[0102] In some embodiments of the present application, the range extender vibration signal data is vibration signal data of a main bearing seat of a cylinder block of the range extender.

[0103] As to the device in the above embodiments, the specific manner in which each module performs operations has been described in detail in the embodiments of the method, and will not be described in detail here.

[0104] The calibration device for improving the working noise of the range extender provided in the embodiments of the present application acquires the in-vehicle noise signal data and the range extender vibration signal data, and performs angle domain analysis; according to the angle domain analysis result, the target cylinder causing the knocking noise of the crankshaft system is determined; and then the ignition advance angle of the target cylinder is calibrated according to the target retardation angle. Without affecting the overall performance of the range extender, by retarding the ignition advance angle of a certain cylinder, the burst pressure of the certain cylinder can be reduced, the excitation force acting on the range extender crankshaft system is reduced from the source, and thus the knocking noise of the range extender crankshaft system can be improved, and the sound quality inside the vehicle is improved.

[0105] According to the embodiments of the present application, the present application also provides an electronic device and a readable storage medium.

[0106] As shown in Figure 5 , it is a block diagram of an electronic device for implementing the method for calibrating the improvement of the working noise of the range extender according to the embodiments of the present application. The electronic device is intended to represent various forms of digital computers, such as laptops, desktops, workstations, personal digital assistants, servers, blade servers, mainframes, and other appropriate computers. The electronic device can also represent various forms of mobile devices, such as personal digital processors, cellular telephones, smart phones, wearable devices, and other similar computing devices. The components shown here, their connections, and their functions, are meant to be examples only, and are not intended to limit the implementations of the present application described and / or claimed in this document.

[0107] As shown in Figure 5 , the electronic device includes one or more processors 501, a memory 502, and interfaces for connecting various components, including high-speed interfaces and low-speed interfaces. Various components are connected to each other by different buses, and can be installed on a common motherboard or otherwise installed as needed. The processor can process instructions executed within the electronic device, including instructions stored in the memory or on the memory to display a GUI on an external input / output device, such as a display device coupled to the interface. In other embodiments, multiple processors and / or multiple buses can be used with multiple memories and multiple storage devices, if desired. Similarly, multiple electronic devices can be connected, each device providing part of the necessary operations (for example, as a server array, a group of blade servers, or a multi-processor system). Figure 5 In the above-mentioned electronic device, the processor 501 is taken as an example.

[0108] The memory 502 is a non-transitory computer readable storage medium provided by the present application. The memory stores instructions executable by at least one processor, so that the at least one processor executes the method for improving the calibration of the working noise of the range extender provided by the present application. The non-transitory computer readable storage medium of the present application stores computer instructions for causing a computer to execute the method for improving the calibration of the working noise of the range extender.

[0109] The memory 502 is a non-transitory computer readable storage medium, which can be used to store non-transitory software programs, non-transitory computer executable programs and modules, such as the program instructions / modules (for example, the noise data acquisition module 401, the angle domain analysis module 402, the target cylinder determination module 403 and the ignition angle calibration module 404) of the method for improving the calibration of the working noise of the range extender in the embodiments of the present application. Figure 4 The processor 501 executes various function applications and data processing of the server by running the non-transitory software programs, instructions and modules stored in the memory 502, that is, implements the method for improving the calibration of the working noise of the range extender in the above-mentioned method embodiments.

[0110] The memory 502 can include a program storage area and a data storage area, wherein the program storage area can store an operating system and application programs required by at least one function; the data storage area can store data created according to the use of the electronic device for improving the calibration of the working noise of the range extender, etc. In addition, the memory 502 can include a high-speed random access memory, and can also include a non-transitory memory, such as at least one magnetic disk storage device, a flash memory device, or other non-transitory solid-state memory device. In some embodiments, the memory 502 can optionally include a memory remotely arranged relative to the processor 501, which can be connected to the electronic device for improving the calibration of the working noise of the range extender through a network. Examples of the above-mentioned network include but are not limited to the Internet, an intranet, a local area network, a mobile communication network and a combination thereof.

[0111] The electronic device for improving the calibration of the working noise of the range extender can further include an input device 503 and an output device 504. The processor 501, the memory 502, the input device 503 and the output device 504 can be connected through a bus or other means, Figure 5 for example, through a bus connection.

[0112] The input device 503 can receive input digital or character information, and generate key signal inputs in connection with a user's setting of the electronic device for improving the calibration of the range extender operating noise and function controls, such as a touch screen, a keypad, a mouse, a trackpad, a touchpad, a pointing stick, one or more mouse buttons, a trackball, a joystick, etc. The output device 504 can include a display device, an auxiliary lighting device (e.g., an LED), and a haptic feedback device (e.g., a vibration motor), etc. The display device can include, but is not limited to, a liquid crystal display (LCD), a light emitting diode (LED) display, and a plasma display. In some embodiments, the display device can be a touch screen.

[0113] Various implementations of the systems and techniques described here can be realized in digital electronic circuitry, integrated circuitry, specially designed ASICs (application specific integrated circuits), computer hardware, firmware, software, and / or combinations thereof. These various implementations can include implementation in one or more computer programs that are executable and / or interpretable on a programmable system including at least one programmable processor, which can be special or general purpose, coupled to receive data and instructions from, and to transmit data and instructions to, a storage system, at least one input device, and at least one output device.

[0114] These computer programs (also known as programs, software, software applications or code) include machine instructions for a programmable processor, and can be implemented in a high-level procedural and / or object-oriented programming language, and / or in assembly / machine language. As used herein, the terms "machine-readable medium" and "computer-readable medium" refer to any computer program product, apparatus and / or device (e.g., magnetic discs, optical disks, memory, Programmable Logic Devices (PLDs)) used to provide machine instructions and / or data to a programmable processor, including a machine-readable medium that receives machine instructions as a machine-readable signal. The term "machine-readable signal" refers to any signal used to provide machine instructions and / or data to a programmable processor.

[0115] To provide for interaction with a user, the systems and techniques described here can be implemented on a computer having a display device (e.g., a CRT (cathode ray tube) or LCD (liquid crystal display) monitor) for displaying information to the user and a keyboard and a pointing device (e.g., a mouse or a trackball) by which the user can provide input to the computer. Other kinds of devices can be used to provide for interaction with a user as well; for example, feedback provided to the user can be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and input from the user can be received in any form, including acoustic, speech, or tactile input.

[0116] The systems and techniques described here can be implemented in a computing system that includes a back end component (e.g., as a data server), or that includes a middleware component (e.g., an application server), or that includes a front end component (e.g., a user computer having a graphical user interface or a Web browser through which a user can interact with an implementation of the systems and techniques described here), or any combination of such back end, middleware, or front end components. The components of the system can be interconnected by any form or medium of digital data communication (e.g., a communication network). Examples of communication networks include a local area network (LAN), a wide area network (WAN), and the Internet.

[0117] The computer system can include clients and servers. A client and server are generally remote from each other and typically interact through a communication network. The relationship of client and server arises by virtue of computer programs running on the respective computers and having a client-server relationship to each other.

[0118] In an example embodiment, a computer program product is also provided, which, when the instructions thereof are executed by a processor of an electronic device, enables the electronic device to perform the above method.

[0119] It should also be noted that the example embodiments mentioned in the present application describe some methods or systems based on a series of steps or devices. However, the present application is not limited to the order of the above steps, that is, the steps can be performed in the order mentioned in the embodiments, or different from the order in the embodiments, or several steps are performed simultaneously.

[0120] Other embodiments of the application will be apparent to those skilled in the art from consideration of the specification and practice of the application disclosed herein. It is intended that the specification and examples be considered as exemplary only, with a true scope of the application being indicated by the following claims.

[0121] It is to be understood that the application is not limited to the precise construction herein disclosed and shown in the drawings, and that various changes in shape, size and arrangements of parts can be made without departing from the scope of the application as recited in the claims. The scope of the application is only limited by the appended claims.

Claims

1. A calibration method for improving the operating noise of a range extender, characterized in that, include: Acquire in-vehicle noise signal data and range extender vibration signal data during range extender operation; Angle domain analysis was performed on the in-vehicle noise signal data and the range extender vibration signal data to obtain the angle domain analysis results. Based on the angle domain analysis results, the target cylinder in the range extender that causes knocking noise in the crankshaft system is determined; this includes: obtaining the peak value of the angle domain signal of each cylinder of the engine based on the angle domain analysis results; and determining the target cylinder in the range extender that causes knocking noise in the crankshaft system based on the peak value of the angle domain signal of each cylinder. Obtain the target delay angle, and calibrate the ignition advance angle of the target cylinder based on the target delay angle.

2. The method according to claim 1, characterized in that, The angle domain analysis of the in-vehicle noise signal data and the range extender vibration signal data yields the following results: Determine the angle reference point of the range extender for angle domain analysis; Based on the aforementioned angle reference point, both the in-vehicle noise signal data and the range extender vibration signal data are converted into angle domain data. Angle domain analysis is performed on the angle domain data to obtain the angle domain analysis results.

3. The method according to claim 2, characterized in that, Determining the angle reference point for angle domain analysis of the range extender includes: Obtain the cylinder pressure signal of the first cylinder of the vehicle; The point corresponding to the maximum value in the cylinder pressure signal is determined as the compression top dead center of the first cylinder; The top dead center of the first cylinder is determined as the angular reference point for the range extender's angular domain analysis.

4. The method according to claim 1, characterized in that, The process of obtaining the target delay angle and calibrating the ignition advance angle of the target cylinder based on the target delay angle includes: Obtain the target delay angle and calculate the angle difference between the ignition advance angle of the target cylinder and the target delay angle; The ignition advance angle of the target cylinder is calibrated based on the angle difference.

5. The method according to claim 1, characterized in that, The acquisition of in-vehicle noise signal data during the operation of the range extender includes: Acquire in-vehicle noise signal data collected by the in-vehicle microphone when the range extender is operating.

6. The method according to claim 1, characterized in that, The vibration signal data of the range extender is the vibration signal data of the main bearing housing of the cylinder block of the range extender.

7. A calibration device for improving the operating noise of a range extender, characterized in that, include: The noise data acquisition module is used to acquire in-vehicle noise signal data and range extender vibration signal data when the range extender is working. An angle domain analysis module is used to perform angle domain analysis on the in-vehicle noise signal data and the range extender vibration signal data to obtain the angle domain analysis results. A target cylinder determination module is used to determine the target cylinder in the range extender that causes knocking noise in the crankshaft system based on the angle domain analysis results; including: obtaining the peak value of the angle domain signal of each cylinder of the engine based on the angle domain analysis results; and determining the target cylinder in the range extender that causes knocking noise in the crankshaft system based on the peak value of the angle domain signal of each cylinder. The ignition angle calibration module is used to obtain the target delay angle and calibrate the ignition advance angle of the target cylinder based on the target delay angle.

8. An electronic device, characterized in that, include: At least one processor; as well as A memory communicatively connected to the at least one processor; wherein, The memory stores instructions executable by the at least one processor, which, when executed by the at least one processor, enables the at least one processor to perform the calibration method for improving the operating noise of the range extender as described in any one of claims 1 to 6.

9. A non-transitory computer-readable storage medium storing computer instructions, characterized in that, The computer instructions are used to cause the computer to execute the calibration method for improving the operating noise of the range extender as described in any one of claims 1 to 6.

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