Vehicle range extender starting and stopping speed scheme generation method and device

Abstract

The embodiment of the invention provides a vehicle range extender start-stop speed scheme generation method and device, and the method comprises the steps: carrying out the start-stop vibration noise test of a range extender on a vehicle through controlling the range extender of the vehicle to be in different range extender states, and obtaining the start-stop vibration noise test data of the range extender; wherein the state of the range extender at least comprises a cold machine state and a warm machine state; then, under the condition that the vehicle is controlled to be in a pure electric mode, constant-speed vibration noise testing is conducted on the vehicle, and pure electric constant-speed working condition vibration noise testing data are obtained; according to the range extender start-stop vibration noise test data and the pure electric constant-speed working condition vibration noise test data, the range extender start-stop speed scheme of the vehicle is obtained, the range extender start-stop speed scheme based on the noise test data is generated, range extender start-stop control only depending on the whole vehicle power requirement is avoided, and the range extender start-stop speed scheme can be obtained. Noise and vibration generated when the range extender is started and stopped are reduced, and the driving comfort and the NVH performance of the vehicle are improved.

Description

Technical Field

[0001] The present invention relates to the field of vehicle control, and in particular to a method and device for generating a start-stop speed plan for a vehicle range extender. Background Art

[0002] Extended-range vehicles (ERVs) offer the driving experience of pure electric vehicles while addressing range anxiety, making them a popular choice among consumers. ERVs operate in three main modes: pure electric, extended-range, and regenerative. In pure electric and regenerative modes, the range extender is not active, resulting in excellent drivability and NVH (Noise, Vibration, and Harshness) performance. In extended-range mode, the range extender is active, and in-vehicle NVH performance is directly related to the range extender's control strategy.

[0003] Currently, the vibration and noise generated by the range extender when starting and stopping in extended-range mode are quite significant, affecting the driving experience of passengers in the vehicle. The user acceptance of extended-range electric vehicles depends largely on the NVH experience inside the vehicle when the range extender starts and stops during driving.

[0004] However, the start-stop speed scheme used in the related art for controlling the range extender is mainly designed based on the power requirements of the entire vehicle, ignoring people's demand for driving quality, especially the improvement of NVH in the car. As a result, the vibration and noise in the car are obviously perceived when the range extender of the extended-range vehicle is started and stopped, affecting the user's driving experience. Summary of the Invention

[0005] In view of the above problems, a method and device for generating a start-stop speed plan for a vehicle range extender is proposed to overcome the above problems or at least partially solve the above problems, including: A method for generating a start-stop speed plan for a vehicle range extender, characterized in that the method comprises: Under the condition that the range extender of the vehicle is controlled to be in different range extender states, performing a range extender start-stop vibration and noise test on the vehicle to obtain range extender start-stop vibration and noise test data; wherein the range extender state includes at least a cold state and a warm state; Under the condition that the vehicle is controlled to be in a pure electric mode, a uniform speed vibration and noise test is performed on the vehicle to obtain pure electric uniform speed working condition vibration and noise test data; A start-stop speed plan for the range extender of the vehicle is obtained based on the range extender start-stop vibration and noise test data and the pure electric uniform speed working condition vibration and noise test data.

[0006] Optionally, the vibration and noise test data include at least noise data measured at the main driver's position of the vehicle, vibration acceleration data measured at the steering wheel position of the vehicle, and vibration acceleration data measured at the guide rail position of the main driver's seat of the vehicle.

[0007] Optionally, performing a range extender start-stop vibration and noise test on the vehicle under the condition of controlling the range extender of the vehicle to be in different range extender states to obtain range extender start-stop vibration and noise test data includes: Under the condition that the range extender of the vehicle is controlled to be in a cold state, performing a range extender startup vibration and noise test on the vehicle to obtain cold start vibration and noise test data; Under the condition that the range extender of the vehicle is controlled to be in a warm-up state, performing a start-stop vibration and noise test on the vehicle to obtain warm-up start-stop vibration and noise test data; The range extender start-stop vibration and noise test data is obtained according to the cold engine start-up vibration and noise test data and the warm engine start-stop vibration and noise test data.

[0008] Optionally, performing a uniform speed vibration and noise test on the vehicle under the condition that the vehicle is controlled to be in a pure electric mode to obtain pure electric uniform speed vibration and noise test data includes: Under the condition that the vehicle is in pure electric mode, a uniform speed vibration and noise test is performed on the vehicle at different vehicle speeds to obtain the pure electric uniform speed working condition vibration and noise test data.

[0009] Optionally, obtaining a start-stop speed plan for the range extender of the vehicle based on the range extender start-stop vibration and noise test data and the pure electric uniform speed vibration and noise test data includes: Determining a start-stop control judgment rule for the vehicle's range extender based on the range extender start-stop vibration and noise test data and the pure electric uniform speed operating condition vibration and noise test data; The vehicle speed is calibrated according to the range extender start-stop control judgment rule to obtain the range extender start-stop speed plan.

[0010] Optionally, determining a start-stop control judgment rule for the vehicle's range extender based on the range extender start-stop vibration and noise test data and the pure electric uniform speed operating condition vibration and noise test data includes: Determine the difference data between the range extender start-stop vibration and noise test data and the pure electric uniform speed working condition vibration and noise test data, and determine the vehicle's range extender start-stop control judgment rule based on the difference data.

[0011] A vehicle range extender start-stop control method based on the range extender start-stop speed scheme described above, the method comprising: determining an operating state of the vehicle in response to a range extender start / stop command of the vehicle; When the operating state of the vehicle is a driving state, determining a range extender state of the vehicle; determining a target start-stop speed of the vehicle according to the range extender status and the range extender start-stop speed plan of the vehicle; The vehicle is started and stopped by the range extender according to the target start and stop speed.

[0012] A device for generating a start-stop speed plan for a vehicle range extender, the device comprising: a range extender start-stop test module, configured to perform a range extender start-stop vibration and noise test on the vehicle under the condition that the range extender of the vehicle is controlled to be in different range extender states, thereby obtaining range extender start-stop vibration and noise test data; wherein the range extender states include at least a cold state and a warm state; A pure electric test module, configured to perform a uniform speed vibration and noise test on the vehicle under the condition that the vehicle is in a pure electric mode, and obtain vibration and noise test data under a pure electric uniform speed condition; The range extender start-stop speed plan generation module is used to obtain the range extender start-stop speed plan of the vehicle based on the range extender start-stop vibration and noise test data and the pure electric uniform speed working condition vibration and noise test data.

[0013] An electronic device includes a processor, a memory, and a computer program stored in the memory and capable of running on the processor. When the computer program is executed by the processor, the vehicle range extender start-stop speed plan generation method or vehicle range extender start-stop control method as described above is implemented.

[0014] A computer-readable storage medium stores a computer program, which, when executed by a processor, implements the vehicle range extender start-stop speed plan generation method or vehicle range extender start-stop control method as described above.

[0015] The embodiments of the present invention have the following advantages: In an embodiment of the present invention, a range extender start-stop vibration and noise test is performed on the vehicle under conditions where the range extender of the vehicle is controlled to be in different range extender states, so as to obtain range extender start-stop vibration and noise test data; wherein, the range extender state includes at least a cold engine state and a warm engine state; then, a uniform speed vibration and noise test is performed on the vehicle under the condition that the vehicle is controlled to be in a pure electric mode, so as to obtain pure electric uniform speed working condition vibration and noise test data; and then, based on the range extender start-stop vibration and noise test data and the pure electric uniform speed working condition vibration and noise test data, a range extender start-stop speed scheme of the vehicle is obtained, thereby realizing the generation of a range extender start-stop speed scheme based on noise test data, and improving the rationality of the generation of the range extender start-stop speed scheme by using the pure electric mode test data as a reference, avoiding relying solely on the power demand of the entire vehicle for range extender start-stop control, reducing the noise and vibration generated when the range extender is started and stopped, and improving driving comfort and the NVH performance of the vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solution of the present invention, the following briefly introduces the drawings required for use in the description of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0017] Figure 1 is a flowchart of the steps of a method for generating a start-stop speed plan for a vehicle range extender provided by some embodiments of the present invention; Figure 2 is a diagram of the NVH test environment of the present invention provided by some embodiments of the present invention; Figure 3 This is an example diagram of noise collection points at the main driver's position provided by some embodiments of the present invention; Figure 4 This is an example diagram of vibration acceleration collection points for the steering wheel and driver's seat guide rail positions provided by some embodiments of the present invention; Figure 5 It is a schematic diagram of the overall process of the present invention provided by some embodiments of the present invention; Figure 6 is a flowchart of the steps of a vehicle range extender start-stop control method based on a range extender start-stop speed scheme provided by some embodiments of the present invention; Figure 7 is a schematic diagram of a start-stop control flow of a range extender provided by some embodiments of the present invention; Figure 8 This is a schematic structural diagram of a vehicle range extender start-stop speed plan generating device provided by some embodiments of the present invention; Figure 91 is a schematic structural diagram of a vehicle range extender start-stop control device based on a range extender start-stop speed scheme provided by some embodiments of the present invention. DETAILED DESCRIPTION

[0018] To make the above-mentioned objects, features, and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the embodiments described are only a portion of the embodiments of the present invention, not all of them. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without inventive effort are also within the scope of protection of the present invention.

[0019] Extended-range vehicles (ERVs) offer the driving experience of pure electric vehicles while alleviating range anxiety, making them a popular choice among consumers. ERVs operate in three main modes: pure electric, extended-range, and regenerative braking. In pure electric and regenerative braking modes, the range extender is not active, resulting in excellent drivability and vehicle noise, harshness, and harshness. In extended-range mode, the range extender is active, and in-vehicle NVH performance is directly related to the range extender's control strategy.

[0020] Currently, the vibration and noise generated by the range extender when starting and stopping in extended-range mode are quite significant, affecting the driving experience of passengers in the vehicle. The user acceptance of extended-range electric vehicles depends largely on the NVH experience inside the vehicle when the range extender starts and stops during driving.

[0021] However, the start-stop speed scheme used in the related art for controlling the range extender is mainly designed based on the power requirements of the entire vehicle, ignoring people's demand for driving quality, especially the improvement of NVH in the car. As a result, the vibration and noise in the car are obviously perceived when the range extender of the extended-range vehicle is started and stopped, affecting the user's driving experience.

[0022] In the embodiment of the present invention, the core technical concept of generating a start-stop speed plan for a range extender based on noise test data improves the method for generating a start-stop speed plan for a vehicle range extender in the related art. The present invention will be described in detail below with reference to the accompanying drawings: Reference Figure 1 , shows a flowchart of a method for generating a start-stop speed plan for a vehicle range extender provided by some embodiments of the present invention, which may specifically include the following steps: Step 101, performing a start-stop vibration and noise test on the vehicle while controlling the range extender of the vehicle to be in different range extender states, thereby obtaining range extender start-stop vibration and noise test data; wherein the range extender states include at least a cold state and a warm state; In the specific implementation, Figure 2As shown, NVH tests of the range extender with cold engine start-stop and warm engine start-stop can be carried out in a semi-anechoic chamber, and the range extender start-stop vibration and noise test data in the cold engine state and warm engine state can be obtained to obtain the vibration and noise conditions of various positions in the range extender vehicle. Specifically, at least three sets of data can be tested to ensure the accuracy of the results; Specifically, the vibration and noise test data may include the noise data measured at the main driving position of the vehicle, the vibration acceleration data measured at the vehicle steering wheel position, and the vibration acceleration data measured at the main driving seat guide rail position of the vehicle, such as Figure 3 As shown, corresponding measuring points can be set at the main driving position to collect external ear noise. The collected signal is generally sound pressure, but in order to make the result more intuitive, it can be converted into sound pressure level in dB(A). The conversion formula is shown in formula (1): (1) In formula (1): SPL is the sound pressure level, the unit is decibel dB(A); P e is the sound pressure value of the test, the unit is Pascal Pa; P ref For the reference sound pressure value, it can be taken as 2x10 -5 , is the audible threshold sound pressure of the human ear at 1000Hz.

[0024] Further, such as Figure 4 As shown in the figure, measuring points can be set at the steering wheel and the main driver's seat rail to obtain the vibration acceleration data at the corresponding positions. Specifically, the vibration acceleration data of the steering wheel in the X, Y, and Z directions, as well as the vibration acceleration data of the driver's seat rail in the X, Y, and Z directions can be collected simultaneously. In order to comprehensively measure the vibration conditions of the steering wheel and the seat rail, the comprehensive vibration acceleration can be calculated using formula (2): (2) In formula (2): a RSS is the comprehensive vibration acceleration; a x is the vibration acceleration in the X direction; a y is the vibration acceleration in the Y direction; a z is the vibration acceleration in the Z direction.

[0026] In some embodiments of the present invention, performing a range extender start-stop vibration and noise test on the vehicle under the condition that the range extender of the vehicle is controlled to be in different range extender states to obtain the range extender start-stop vibration and noise test data includes: Under the condition that the range extender of the vehicle is controlled to be in a cold state, performing a range extender startup vibration and noise test on the vehicle to obtain cold start vibration and noise test data; Under the condition that the range extender of the vehicle is controlled to be in a warm-up state, performing a start-stop vibration and noise test on the vehicle to obtain warm-up start-stop vibration and noise test data; The range extender start-stop vibration and noise test data is obtained according to the cold engine start-up vibration and noise test data and the warm engine start-stop vibration and noise test data.

[0027] In practical applications, as mentioned above, NVH tests of cold start-stop and warm start-stop of the range extender can be carried out in a semi-anechoic chamber to obtain the start-stop vibration and noise test data of the range extender in the cold state and the warm state. Specifically, the range extender start-up vibration and noise test can be carried out on the vehicle under the condition that the vehicle's range extender is controlled to be in the cold state to obtain the cold start-up vibration and noise test data. The range extender start-stop vibration and noise test can also be carried out on the vehicle under the condition that the vehicle's range extender is controlled to be in the warm state to obtain the warm start-stop vibration and noise test data. The overall range extender start-stop vibration and noise test data can be obtained based on the cold start-up vibration and noise test data and the warm start-stop vibration and noise test data.

[0028] In one example, Table 1 below is an example table of the test results of the range extender starting the vehicle interior vibration and noise under cold engine conditions (cold engine start vibration and noise test data), and Tables 2 and 3 show examples of the warm engine start-stop vibration and noise test data, wherein Table 2 is an example table of the test results of the range extender starting the vehicle interior vibration and noise under warm engine conditions, and Table 3 is an example table of the test results of the range extender stopping the vehicle interior vibration and noise under warm engine conditions: Table 1: Example of in-vehicle vibration and noise test results for range extender startup under cold engine conditions

[0029] Table 2: Example of in-vehicle vibration and noise test results for range extender startup under warm-up conditions

[0030] Table 3: Example of vibration and noise test results in the range extender with the vehicle stopped under warm-up conditions

[0031] It should be noted that in the table, FLR (Front Left Right) refers to the front left and right sound pressure levels at measurement points within the vehicle, primarily used to measure noise conditions at specific locations. In NVH testing, FLR data is typically used to describe the noise level at specific locations, such as the driver's ear, to evaluate the characteristics and variability of interior noise. SW (Steering Wheel) refers to the vibration acceleration at the steering wheel, and the integrated vibration acceleration (SW / g) is used to quantify the overall vibration of the steering wheel. DR (Driverseat Rail) refers to the vibration acceleration at the driver's seat rail, and the integrated vibration acceleration (DR / g) is used to quantify the overall vibration of the seat rail.

[0032] In this embodiment, by performing vibration and noise tests for cold engine start-up and warm engine start-up and stop conditions respectively, basic data can be provided for optimizing the start-stop strategy of the range extender based on the impact of different operating temperatures on the vibration and noise when the range extender is started and stopped. This allows the start-stop strategy of the range extender to be formulated more accurately, so as to maintain a comfortable NVH level in the vehicle under different conditions.

[0033] Step 102 , performing a uniform speed vibration and noise test on the vehicle under the condition that the vehicle is in a pure electric mode, to obtain pure electric uniform speed vibration and noise test data; In specific implementation, a uniform-speed NVH test (on a smooth asphalt road surface) of the entire vehicle can be carried out at various vehicle speeds (10-100km / h, measured every 10km / h) in pure electric mode to obtain the vibration and noise data inside the vehicle under each uniform-speed condition and then obtain the overall pure electric uniform-speed vibration and noise test data. By testing the vibration and noise at different vehicle speeds, the vibration and noise change pattern of the vehicle in pure electric mode can be obtained, thereby providing a judgment basis for the noise and vibration perception when the range extender is started and stopped.

[0034] In one example, Table 4 below shows examples of vehicle interior vibration and noise under various constant speed conditions in EV mode: Table 4: Example of interior vibration and noise under various constant speed conditions in EV mode

[0035] In some embodiments of the present invention, the vibration and noise test data at least includes noise data measured at the main driver's position of the vehicle, vibration acceleration data measured at the steering wheel position of the vehicle, and vibration acceleration data measured at the main driver's seat guide rail position of the vehicle.

[0036] In a specific implementation, the vibration and noise test data may include noise data measured at the vehicle's main driving position, vibration acceleration data measured at the vehicle's steering wheel position, and vibration acceleration data measured at the vehicle's main driving seat guide rail position, such as Figure 3As shown, corresponding measuring points can be set at the main driving position to collect external ear noise. The collected signal is generally sound pressure, but in order to make the result more intuitive, it can be converted into sound pressure level in dB(A). The conversion formula is shown in formula (1): (1) In formula (1): SPL is the sound pressure level, the unit is decibel dB(A); P e is the sound pressure value of the test, the unit is Pascal Pa; P ref For the reference sound pressure value, it can be taken as 2x10 -5 , is the audible threshold sound pressure of the human ear at 1000Hz.

[0038] Further, such as Figure 4 As shown in the figure, measuring points can be set at the steering wheel and the main driver's seat rail to obtain the vibration acceleration data at the corresponding positions. Specifically, the vibration acceleration data of the steering wheel in the X, Y, and Z directions, as well as the vibration acceleration data of the driver's seat rail in the X, Y, and Z directions can be collected simultaneously. In order to comprehensively measure the vibration conditions of the steering wheel and the seat rail, the comprehensive vibration acceleration can be calculated using formula (2): (2) In formula (2): a RSS is the comprehensive vibration acceleration; a x is the vibration acceleration in the X direction; a y is the vibration acceleration in the Y direction; a z is the vibration acceleration in the Z direction.

[0040] In some embodiments of the present invention, a uniform speed vibration and noise test is performed on the vehicle under the condition that the vehicle is controlled to be in pure electric mode, and pure electric uniform speed working condition vibration and noise test data is obtained, including: Under the condition that the vehicle is in pure electric mode, a uniform speed vibration and noise test is performed on the vehicle at different vehicle speeds to obtain the pure electric uniform speed working condition vibration and noise test data.

[0041] In actual applications, a uniform-speed NVH test (on a smooth asphalt road surface) can be carried out on the entire vehicle at various speeds (10-100km / h, measured every 10km / h) in pure electric mode to obtain the vibration and noise data inside the vehicle under each uniform-speed condition, and then obtain the overall pure electric uniform-speed vibration and noise test data. By testing the vibration and noise at different vehicle speeds, the vibration and noise change pattern of the vehicle in pure electric mode can be obtained, thereby providing a judgment basis for the noise and vibration perception when the range extender is started and stopped.

[0042] Step 103 , obtaining a range extender start-stop speed plan for the vehicle based on the range extender start-stop vibration and noise test data and the pure electric uniform speed vibration and noise test data.

[0043] In practice, the start-stop vibration and noise test data of the range extender can be compared with the test data of the pure electric constant speed operation. Based on the noise masking effect and the human perception of vibration, a speed plan for the range extender start-stop can be developed for the vehicle. Regarding the masking effect, the human ear can distinguish subtle sounds in a quiet environment, but in a noisy environment, these subtle sounds are drowned out by the cacophony. This phenomenon, in which the hearing threshold of a second sound is raised due to the presence of the first sound, is called the masking effect. The first sound is called the masking sound, and the second sound is called the masked sound. This phenomenon of the hearing threshold being raised is called the masking effect. The masking effect is a complex physiological and psychological phenomenon. Numerous statistical studies have shown that the amount of masking one sound exerts on another (masking is the amount by which the hearing threshold of the masked sound increases relative to its hearing threshold in a silent state (usually expressed in decibels) in the presence of the masking sound) depends on many factors, primarily the relative intensity and frequency structure of the two sounds. However, the listener's attention to one sound can also influence the masking effect of the other sound.

[0044] On this basis, the following Table 5 is a reference table of the present invention based on the masking effect and the summarized human body's perception of vibration: Table 5: Reference table of human vibration perception rules

[0045] Furthermore, the difference between the interior noise at each uniform speed condition in EV mode and the noise at the start and stop of the range extender can be set as X, and the difference between the vibration acceleration of the steering wheel and seat rails at the start and stop of the range extender and the effective value of the vibration acceleration of the steering wheel and seat rails at each uniform speed condition in EV mode can be set as Y (for example, X1 and Y1 can be set for a uniform speed of 10 km / h, X2 and Y2 can be set for a uniform speed of 20 km / h, etc.), where Y can be the effective value difference between the vibration acceleration of the steering wheel at the start and stop of the range extender and the interior vibration acceleration of the steering wheel at each uniform speed condition in EV mode, or it can be the effective value difference between the vibration acceleration of the seat rails at the start and stop of the range extender and the interior vibration acceleration of the seat rails at each uniform speed condition in EV mode. The largest effective value difference can also be selected as Y according to actual needs.

[0046] On this basis, combined with the contents of Table 5, the following range extender start-stop control judgment rules can be obtained: When X>6dB(A) and Y<0.008g, the range extender startup noise and vibration cannot be perceived by people in the car, and the range extender can be started and stopped at will; When 3 dB(A)≤X≤6dB(A) and 0.008≤Y≤0.02g, the range extender startup noise and vibration are not easily perceived by the occupants of the vehicle. At this time, the range extender can be conditionally started and stopped according to the vehicle power demand and battery SOC status; When 0≤X<3dB(A) and 0.02<Y<0.05g, the range extender startup noise and vibration can be felt by the occupants of the vehicle. In this case, the range extender is allowed to start but is restricted from stopping. When X<0 and Y>0.3g, the start-stop noise and vibration of the range extender can be easily perceived by people in the car. At this time, the start-stop of the range extender should be restricted.

[0047] Based on the above-mentioned range extender start-stop control judgment rules, a range extender start-stop speed plan can be formulated. For example, the corresponding vehicle speeds for the range extender cold start, warm-up start, and shutdown modes can be set as V1, V2, and V3, respectively. The actual values of V1, V2, and V3 can be obtained by combining the above-mentioned range extender start-stop control judgment rules with actual vibration and noise test data to calibrate the range extender controller and vehicle control speed. This allows for control of the range extender's start and stop, while preventing noise from affecting the user's driving experience.

[0048] In some embodiments of the present invention, obtaining the range extender start-stop speed plan of the vehicle according to the range extender start-stop vibration and noise test data and the pure electric uniform speed vibration and noise test data includes: Determining a start-stop control judgment rule for the vehicle's range extender based on the range extender start-stop vibration and noise test data and the pure electric uniform speed operating condition vibration and noise test data; The vehicle speed is calibrated according to the range extender start-stop control judgment rule to obtain the range extender start-stop speed plan.

[0049] In actual applications, the difference between the interior noise under various uniform speed conditions in EV mode and the noise when the range extender is started and stopped can be set to X, and the difference between the vibration acceleration of the steering wheel and seat rails when the range extender is started and stopped and the effective values of the vibration acceleration of the steering wheel and seat rails under various uniform speed conditions in EV mode can be set to Y (for example, X1 and Y1 can be set for a uniform speed of 10 km / h, X2 and Y2 can be set for a uniform speed of 20 km / h, etc.), where Y can be the effective value difference between the vibration acceleration of the steering wheel when the range extender is started and stopped and the interior vibration acceleration of the steering wheel under various uniform speed conditions in EV mode, or the effective value difference between the vibration acceleration of the seat rails when the range extender is started and stopped and the interior vibration acceleration of the seat rails under various uniform speed conditions in EV mode. The largest effective value difference can also be selected as Y according to actual needs.

[0050] On this basis, combined with the contents of Table 5, the following range extender start-stop control judgment rules can be obtained: When X>6dB(A) and Y<0.008g, the range extender startup noise and vibration cannot be perceived by people in the car, and the range extender can be started and stopped at will; When 3 dB(A)≤X≤6dB(A) and 0.008≤Y≤0.02g, the range extender startup noise and vibration are not easily perceived by the occupants of the vehicle. At this time, the range extender can be conditionally started and stopped according to the vehicle power demand and battery SOC status; When 0≤X<3dB(A) and 0.02<Y<0.05g, the range extender startup noise and vibration can be felt by the occupants of the vehicle. In this case, the range extender is allowed to start but is restricted from stopping. When X<0 and Y>0.3g, the start-stop noise and vibration of the range extender can be easily perceived by people in the car. At this time, the start-stop of the range extender should be restricted.

[0051] Based on the above-mentioned range extender start-stop control judgment rules, a range extender start-stop speed plan can be formulated. For example, the corresponding vehicle speeds for the range extender cold start, warm-up start, and shutdown modes can be set as V1, V2, and V3, respectively. The actual values of V1, V2, and V3 can be obtained by combining the above-mentioned range extender start-stop control judgment rules with actual vibration and noise test data to calibrate the range extender controller and vehicle control. This allows control of the range extender start and stop of the entire vehicle and avoids noise that affects the user's driving experience. Through speed calibration, a scientific range extender start-stop speed plan can be formulated based on the vehicle's actual vibration and noise data, ensuring that the vehicle's power requirements and NVH levels are balanced under different operating conditions.

[0052] In some embodiments of the present invention, determining a start-stop control judgment rule for the vehicle's range extender based on the range extender start-stop vibration and noise test data and the pure electric uniform speed operating condition vibration and noise test data includes: Determine the difference data between the range extender start-stop vibration and noise test data and the pure electric uniform speed working condition vibration and noise test data, and determine the vehicle's range extender start-stop control judgment rule based on the difference data.

[0053] In actual applications, the difference between the interior noise under various uniform speed conditions in EV mode and the noise when the range extender is started and stopped can be set to X, and the difference between the vibration acceleration of the steering wheel and seat rails when the range extender is started and stopped and the effective values of the vibration acceleration of the steering wheel and seat rails under various uniform speed conditions in EV mode can be set to Y (for example, X1 and Y1 can be set for a uniform speed of 10 km / h, X2 and Y2 can be set for a uniform speed of 20 km / h, etc.), where Y can be the effective value difference between the vibration acceleration of the steering wheel when the range extender is started and stopped and the interior vibration acceleration of the steering wheel under various uniform speed conditions in EV mode, or the effective value difference between the vibration acceleration of the seat rails when the range extender is started and stopped and the interior vibration acceleration of the seat rails under various uniform speed conditions in EV mode. The largest effective value difference can also be selected as Y according to actual needs.

[0054] On this basis, the following range extender start-stop control judgment rules can be obtained: When X>6dB(A) and Y<0.008g, the range extender startup noise and vibration cannot be perceived by people in the car, and the range extender can be started and stopped at will; When 3 dB(A)≤X≤6dB(A) and 0.008≤Y≤0.02g, the range extender startup noise and vibration are not easily perceived by the occupants of the vehicle. At this time, the range extender can be conditionally started and stopped according to the vehicle power demand and battery SOC status; When 0≤X<3dB(A) and 0.02<Y<0.05g, the range extender startup noise and vibration can be felt by the occupants of the vehicle. In this case, the range extender is allowed to start but is restricted from stopping. When X<0 and Y>0.3g, the start-stop noise and vibration of the range extender can be easily perceived by people in the car. At this time, the start-stop of the range extender should be restricted.

[0055] In this embodiment, by determining the start-stop control rules based on the difference data between the range extender start-stop vibration and noise test data and the pure electric uniform speed vibration and noise test data, the accuracy of the range extender start-stop decision can be improved, which helps to reduce the vibration and noise impact on the occupants of the vehicle while ensuring power requirements.

[0056] The following combination Figure 5 The embodiments of the present invention are further described as follows: like Figure 5 The figure shows the overall process of the present invention, which can be summarized as follows: Step 1: Conduct NVH tests of the range extender during cold start-stop and warm start-stop in a semi-anechoic chamber to obtain start-stop vibration and noise data of the range extender in cold and warm states; Step 2: Conduct a uniform-speed NVH test of the vehicle at various speeds (10-140 km / h, measured every 10 km / h) in pure electric mode to obtain vibration and noise data inside the vehicle under each uniform speed condition; Step 3: Compare the vibration and noise levels inside the vehicle when the range extender is started and stopped with the vibration and noise levels inside the vehicle under pure electric uniform speed conditions. Based on the masking effect of noise and the human body's perception of vibration, determine the vehicle speed for starting and stopping the range extender.

[0057] Reference Figure 6 , shows a flowchart of a vehicle range extender start-stop control method based on a range extender start-stop speed scheme provided by some embodiments of the present invention, which may specifically include the following steps: Step 601, in response to a start / stop command of a range extender of the vehicle, determining an operating state of the vehicle; Step 602: when the operating state of the vehicle is a driving state, determining the state of the range extender of the vehicle; Step 603, determining a target start-stop speed of the vehicle according to the range extender status and the range extender start-stop speed plan of the vehicle; Step 604 : Control the start and stop of the range extender of the vehicle according to the target start and stop speed.

[0058] In the specific implementation, Figure 7 As shown, in response to the vehicle's range extender start / stop command, the vehicle operating state can be determined by the vehicle speed sensor, that is, whether the vehicle is in a parked state or a driving state. If the vehicle is in a parked state, the range extender can be started / stopped according to the command preset in the normal idle condition. If the vehicle is in a driving state, the range extender start / stop state can be determined by the range extender water temperature, that is, whether the vehicle is started with a cold engine or a warm engine. If the range extender is started with a cold engine, the range extender start speed V1, which has been developed in the range extender start / stop speed scheme based on the vibration and noise data of the range extender during a cold start / stop, combined with the noise masking effect and the human body's perception of vibration, can be selected as the target speed for range extender start control. If the range extender is started with a warm engine, the range extender start speed V2 and / or the range extender stop speed V3, which have been developed in the range extender start / stop speed scheme based on the vibration and noise data of the range extender during a warm start / stop, combined with the noise masking effect and the human body's perception of vibration, can be selected as the target speed for range extender start / stop control.

[0059] It should be noted that for the sake of simplicity, the method embodiments are described as a series of actions. However, those skilled in the art should be aware that the embodiments of the present invention are not limited by the order of the actions described, because according to the embodiments of the present invention, certain steps can be performed in other orders or simultaneously. Secondly, those skilled in the art should also be aware that the embodiments described in this specification are all preferred embodiments, and the actions involved are not necessarily required by the embodiments of the present invention.

[0060] Reference Figure 8 , shows a schematic structural diagram of a vehicle range extender start-stop speed plan generation device provided by some embodiments of the present invention, which may specifically include the following modules: The range extender start-stop test module 801 is configured to perform a range extender start-stop vibration and noise test on the vehicle under the condition that the range extender of the vehicle is in different range extender states, thereby obtaining range extender start-stop vibration and noise test data; wherein the range extender states include at least a cold state and a warm state; The pure electric test module 802 is used to perform a uniform speed vibration and noise test on the vehicle under the condition that the vehicle is controlled to be in a pure electric mode, and obtain pure electric uniform speed vibration and noise test data; The range extender start-stop speed plan generating module 803 is used to obtain the range extender start-stop speed plan of the vehicle based on the range extender start-stop vibration and noise test data and the pure electric uniform speed vibration and noise test data.

[0061] In some embodiments of the present invention, the range extender start-stop test module 801 includes: a cold engine start test submodule, configured to perform a range extender start vibration and noise test on the vehicle under the condition that the range extender of the vehicle is in a cold engine state, and obtain cold engine start vibration and noise test data; a warm-up start-stop test submodule, configured to perform a range extender start-stop vibration and noise test on the vehicle under the condition that the range extender of the vehicle is in a warm-up state, and obtain warm-up start-stop vibration and noise test data; The range extender start-stop vibration and noise test data acquisition submodule is used to obtain the range extender start-stop vibration and noise test data according to the cold engine start-up vibration and noise test data and the warm engine start-stop vibration and noise test data.

[0062] In some embodiments of the present invention, the pure electric test module 802 includes: The pure electric test submodule is used to perform a uniform speed vibration and noise test on the vehicle at different vehicle speeds when the vehicle is in the pure electric mode, so as to obtain the pure electric uniform speed working condition vibration and noise test data.

[0063] In some embodiments of the present invention, the range extender start-stop speed plan generating module 803 includes: a start-stop control judgment rule determination submodule, configured to determine a start-stop control judgment rule for the vehicle's range extender based on the range extender start-stop vibration and noise test data and the pure electric uniform speed operating condition vibration and noise test data; The range extender start-stop speed plan generating submodule is used to calibrate the vehicle speed according to the range extender start-stop control judgment rule to obtain the range extender start-stop speed plan.

[0064] In some embodiments of the present invention, the start-stop control judgment rule determination submodule includes: The start-stop control judgment rule determination unit is used to determine the difference data between the start-stop vibration and noise test data of the range extender and the vibration and noise test data of the pure electric uniform speed working condition, and determine the start-stop control judgment rule of the vehicle's range extender based on the difference data.

[0065] Reference Figure 9 , shows a schematic structural diagram of a vehicle range extender start-stop control device based on a range extender start-stop speed scheme provided by some embodiments of the present invention, which may specifically include the following modules: A vehicle operating state determining module 901 is configured to determine the operating state of the vehicle in response to a start / stop command of the range extender of the vehicle; The range extender state determination module 902 is configured to determine the range extender state of the vehicle when the vehicle is in the driving state; a target start / stop speed determining module 903, configured to determine a target start / stop speed of the vehicle according to the range extender status and the range extender start / stop speed plan of the vehicle; The range extender start-stop control module 904 is configured to control the start-stop of the range extender of the vehicle according to the target start-stop speed.

[0066] Some embodiments of the present invention also provide an electronic device, which may include a processor, a memory, and a computer program stored in the memory and capable of running on the processor. When the computer program is executed by the processor, the above-mentioned vehicle range extender start-stop speed plan generation method or vehicle range extender start-stop control method is implemented.

[0067] Some embodiments of the present invention further provide a computer-readable storage medium storing a computer program. When the computer program is executed by a processor, the method for generating a start-stop speed plan for a vehicle range extender or the method for controlling the start-stop of a vehicle range extender is implemented.

[0068] Some embodiments of the present invention further provide a computer program product, including a computer program, which, when executed by a processor, implements the above vehicle range extender start-stop speed plan generation method or vehicle range extender start-stop control method.

[0069] As for the device embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant parts can be referred to the partial description of the method embodiment.

[0070] The various embodiments in this specification are described in a progressive manner. Each embodiment focuses on the differences from other embodiments, and the same / similar parts between the various embodiments can be referenced to each other.

[0071] Those skilled in the art will appreciate that embodiments of the present invention may be provided as methods, apparatus, or computer program products. Thus, embodiments of the present invention may take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Furthermore, embodiments of the present invention may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to magnetic disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0072] The embodiments of the present invention are described with reference to the flowcharts and / or block diagrams of the methods, terminal devices (systems), and computer program products according to the embodiments of the present invention. It should be understood that each process and / or block in the flowchart and / or block diagram, as well as the combination of the processes and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing terminal device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing terminal device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 a process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0073] These computer program instructions may also be stored in a computer readable memory that can direct a computer or other programmable data processing terminal device to operate in a specific manner, so that the instructions stored in the computer readable memory produce a manufactured product including an instruction device, which implements the process Figure 1 a process or multiple processes and / or boxes Figure 1 The function specified in one or more boxes.

[0074] These computer program instructions can also be loaded onto a computer or other programmable data processing terminal device so that a series of operating steps are executed on the computer or other programmable terminal device to produce a computer-implemented process, thereby providing instructions for executing on the computer or other programmable terminal device to implement the process. Figure 1 a process or multiple processes and / or boxes Figure 1 The steps for the function specified in one or more boxes.

[0075] Although the preferred embodiments of the present invention have been described, those skilled in the art may make additional changes and modifications to these embodiments once they become aware of the basic creative concepts. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the embodiments of the present invention.

[0076] Finally, it should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "includes," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or terminal device that includes a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or terminal device. In the absence of further limitations, an element defined by the phrase "comprises a ..." does not exclude the presence of additional identical elements in the process, method, article, or terminal device that includes the above elements.

[0077] The above is a detailed introduction to a method and device for generating a start-stop speed plan for a vehicle range extender. Specific examples are used herein to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method and core ideas of the present invention. At the same time, for those skilled in the art, according to the ideas of the present invention, there may be changes in the specific implementation methods and application scopes. In summary, the contents of this specification should not be understood as limiting the present invention.

Claims

1. A method for generating a start-stop speed plan for a vehicle range extender, characterized in that: The method comprises: Under the condition that the range extender of the vehicle is controlled to be in different range extender states, performing a range extender start-stop vibration and noise test on the vehicle to obtain range extender start-stop vibration and noise test data; wherein the range extender state includes at least a cold state and a warm state; Under the condition that the vehicle is controlled to be in a pure electric mode, a uniform speed vibration and noise test is performed on the vehicle to obtain pure electric uniform speed working condition vibration and noise test data; A start-stop speed plan for the range extender of the vehicle is obtained based on the range extender start-stop vibration and noise test data and the pure electric uniform speed working condition vibration and noise test data.

2. The method according to claim 1, characterized in that The vibration and noise test data at least includes noise data measured at the main driving position of the vehicle, vibration acceleration data measured at the steering wheel position of the vehicle, and vibration acceleration data measured at the guide rail position of the main driving seat of the vehicle.

3. The method according to claim 1, characterized in that The range extender start-stop vibration and noise test is performed on the vehicle under the condition that the range extender of the vehicle is controlled to be in different range extender states, and the range extender start-stop vibration and noise test data is obtained, including: Under the condition that the range extender of the vehicle is controlled to be in a cold state, performing a range extender startup vibration and noise test on the vehicle to obtain cold start vibration and noise test data; Under the condition that the range extender of the vehicle is controlled to be in a warm-up state, performing a start-stop vibration and noise test on the vehicle to obtain warm-up start-stop vibration and noise test data; The range extender start-stop vibration and noise test data is obtained according to the cold engine start-up vibration and noise test data and the warm engine start-stop vibration and noise test data.

4. The method according to claim 1, wherein The vehicle is subjected to a uniform speed vibration and noise test under the condition that the vehicle is controlled to be in a pure electric mode, and the obtained pure electric uniform speed vibration and noise test data includes: Under the condition that the vehicle is in pure electric mode, a uniform speed vibration and noise test is performed on the vehicle at different vehicle speeds to obtain the pure electric uniform speed working condition vibration and noise test data.

5. The method according to claim 1, characterized in that The method of obtaining a start-stop speed plan for the range extender of the vehicle based on the start-stop vibration and noise test data of the range extender and the vibration and noise test data of the pure electric uniform speed condition includes: Determining a start-stop control judgment rule for the vehicle's range extender based on the range extender start-stop vibration and noise test data and the pure electric uniform speed operating condition vibration and noise test data; The vehicle speed is calibrated according to the range extender start-stop control judgment rule to obtain the range extender start-stop speed plan.

6. The method according to claim 5, characterized in that The determining of the vehicle's range extender start-stop control judgment rule based on the range extender start-stop vibration and noise test data and the pure electric uniform speed operating condition vibration and noise test data includes: Determine the difference data between the range extender start-stop vibration and noise test data and the pure electric uniform speed working condition vibration and noise test data, and determine the vehicle's range extender start-stop control judgment rule based on the difference data.

7. A vehicle range extender start-stop control method based on the range extender start-stop speed scheme according to any one of claims 1 to 6, characterized in that: The method comprises: determining an operating state of the vehicle in response to a range extender start / stop command of the vehicle; When the operating state of the vehicle is a driving state, determining a range extender state of the vehicle; determining a target start-stop speed of the vehicle according to the range extender status and the range extender start-stop speed plan of the vehicle; The vehicle is started and stopped by the range extender according to the target start and stop speed.

8. A vehicle range extender start-stop speed plan generation device, characterized in that: The device comprises: a range extender start-stop test module, configured to perform a range extender start-stop vibration and noise test on the vehicle under the condition that the range extender of the vehicle is controlled to be in different range extender states, thereby obtaining range extender start-stop vibration and noise test data; wherein the range extender states include at least a cold state and a warm state; A pure electric test module, configured to perform a uniform speed vibration and noise test on the vehicle under the condition that the vehicle is in a pure electric mode, and obtain vibration and noise test data under a pure electric uniform speed condition; The range extender start-stop speed plan generation module is used to obtain the range extender start-stop speed plan of the vehicle based on the range extender start-stop vibration and noise test data and the pure electric uniform speed working condition vibration and noise test data.

9. An electronic device, characterized in that: The invention comprises a processor, a memory, and a computer program stored in the memory and capable of running on the processor, wherein when the computer program is executed by the processor, the method for generating a start-stop speed plan for a vehicle range extender according to any one of claims 1 to 6 or the method for controlling the start-stop of a vehicle range extender according to claim 7 is implemented.

10. A computer-readable storage medium, characterized in that The computer-readable storage medium stores a computer program, and when the computer program is executed by the processor, the method for generating a start-stop speed plan for a vehicle range extender according to any one of claims 1 to 6 or the method for controlling the start-stop of a vehicle range extender according to claim 7 is implemented.

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