Method, Control Method, Device and Storage Medium for Establishing Power Generation Parameters of Vehicle Range Extender

Abstract

The present application relates to the technical field of vehicle range - extending power generation, and discloses a method for establishing power generation parameters, a control method, a device and a storage medium for a vehicle range extender. The method for establishing parameters includes: obtaining the base power and base speed corresponding to a preset vehicle speed range of the range extender at a preset optimal fuel - electricity conversion rate; obtaining the vibration and noise data of the vehicle when the range extender operates at a debug power and a debug speed in the preset vehicle speed range; obtaining the debug power and debug speed of the range extender corresponding to different preset vibration and noise standards of the vehicle in the preset vehicle speed range based on the vibration and noise data, and establishing a corresponding relationship between the preset vibration and noise standards and the debug power and debug speed in the preset vehicle speed range. Therefore, a corresponding relationship between the preset vibration and noise standards and the debug power and debug speed is established to achieve a balance between the fuel - electricity conversion rate and vehicle NVH during the control process of the range extender.

Description

Technical Field

[0001] This application relates to the technical field of vehicle range - extending power generation, and particularly relates to a method for establishing power generation parameters of a vehicle range extender, a control method, a device, and a storage medium. Background Art

[0002] The range - extending system of new - energy vehicles can generate electricity when the vehicle's battery power is low, and then supply power to the vehicle's drive motor through the range - extending system to drive the vehicle. Among them, the oil - to - electricity conversion rate of the range - extending system, the NVH performance (Noise, Vibration, Harshness) of the vehicle, etc. are all factors that need to be considered during the power - generation process of the range - extending system.

[0003] Currently, the range - extending system is basically developed by upgrading the original traditional engine, and the hardware system has too many limitations. When ensuring the oil - to - electricity conversion rate of the vehicle, it is easy to cause large vibration and noise problems, resulting in poor NVH performance of the vehicle, and a poor balance between the vehicle's oil - to - electricity conversion rate and NVH performance. Summary of the Invention

[0004] In view of the above problems, this application provides a method for establishing power generation parameters of a vehicle range extender, a control method, a device, and a storage medium, which establishes the corresponding relationship between the preset vibration and noise standards, the debugging power, and the debugging speed, so as to achieve the balance between the oil - to - electricity conversion rate and the vehicle NVH during the control process of the range extender.

[0005] The first aspect of this application provides a method for establishing power generation parameters of a vehicle range extender, including: obtaining the base power and base speed corresponding to a preset vehicle speed range at a preset optimal oil - to - electricity conversion rate of the range extender; where the preset vehicle speed ranges are multiple and non - overlapping; obtaining the vibration and noise data of the vehicle when the range extender operates at the debugging power and debugging speed in the preset vehicle speed range; where multiple debugging powers and multiple debugging speeds are correspondingly set for the preset vehicle speed range, the debugging power is greater than or equal to the base power and the power difference between the two is less than a preset power value, and the speed difference between the debugging speed and the base speed is less than a preset speed value; obtaining the debugging power and debugging speed of the range extender corresponding to different preset vibration and noise standards of the vehicle in the preset vehicle speed range based on the vibration and noise data, and establishing the corresponding relationship between the preset vibration and noise standards, the debugging power, and the debugging speed in the preset vehicle speed range.

[0006] In some specific embodiments, before the step of obtaining the vibration and noise data of the vehicle when the range extender operates at the debug power and the debug speed in a preset vehicle speed range, the method further includes: obtaining the first increased power of the range extender when the air conditioning system of the vehicle operates at the maximum power compared to when the air conditioning system does not operate; determining the debug power of the range extender based on the first increased power, so that the maximum value of the debug power corresponding to the preset vehicle speed range is greater than or equal to the sum of the base power and the first increased power.

[0007] In some specific embodiments, before the step of obtaining the vibration and noise data of the vehicle when the range extender operates at the debug power and the debug speed in a preset vehicle speed range, the method further includes: obtaining the second increased power of the range extender at different preset vehicle speed ranges, at the maximum test gradient and the maximum test load compared to at the preset gradient and the preset load; determining the maximum value of the debug power of the range extender at different preset vehicle speed ranges based on the second increased power, so that the maximum value of the debug power corresponding to the preset vehicle speed range is greater than or equal to the sum of the base power and the second increased power.

[0008] In some specific embodiments, after the step of obtaining the debug power and the debug speed of the range extender corresponding to different preset vibration and noise standards of the vehicle in a preset vehicle speed range based on the vibration and noise data and establishing the corresponding relationship between the preset vibration and noise standards and the debug power and the debug speed in the preset vehicle speed range, the method further includes: determining the debug power and the debug speed that satisfy the preset fuel consumption performance and / or the preset power retention performance among the debug power and the debug speed of the range extender corresponding to the preset vibration and noise standards of the vehicle in the preset vehicle speed range; establishing the corresponding relationship between the preset vibration and noise standards, the preset fuel consumption performance and / or the preset power retention performance, and the debug power and the debug speed in the preset vehicle speed range.

[0009] In some specific embodiments, the power difference between two adjacent debug powers is the same, and the difference between the two debug powers corresponding to the preset vehicle speed range with a higher average vehicle speed is greater; the vehicle speed difference between two adjacent debug speeds is the same, and the difference between the two debug speeds corresponding to the preset vehicle speed range with a higher average vehicle speed is greater; the difference between the debug speed corresponding to the preset vehicle speed range with a higher average vehicle speed and the base speed is greater.

[0010] The second aspect of the present application provides a control method for a vehicle range extender, including: obtaining the current vehicle speed, the target vibration and noise standard, and the current power of the range extender of the vehicle; based on the current vehicle speed, the target vibration and noise standard, the current power, and the corresponding relationship, obtaining the debug speed corresponding to the current vehicle speed, the target vibration and noise standard, and the current power, and using the debug speed as the target speed; where the corresponding relationship is obtained according to the method for establishing the power generation parameters of the vehicle range extender in any one of the above; controlling the range extender to operate at the target speed.

[0011] In some specific embodiments, before the steps of obtaining the current vehicle speed, the target vibration and noise standard, and the current power of the range extender, it includes: obtaining the current load of the vehicle and the current slope of the current driving section; based on the current slope and the current load, obtaining the power change amount of the driving power of the vehicle compared to the preset slope and the preset load; controlling the range extender to generate electricity at the target power to supply power to the drive motor through the range extender; wherein, the target power is the sum of the preset power and the power change amount, and the preset power is the power generation power of the range extender when the vehicle is at the preset basic slope and the preset basic load.

[0012] The third aspect of the present application provides a control device for a vehicle range extender, including: an acquisition module, configured to acquire the current vehicle speed, the target vibration and noise standard, and the current power of the range extender; a control module, configured to obtain a debugging speed corresponding to the current vehicle speed, the target vibration and noise standard, and the current power based on the current vehicle speed, the target vibration and noise standard, the current power, and the corresponding relationship, and use the debugging speed as the target speed; wherein, the corresponding relationship is obtained according to the method for establishing the power generation parameters of the vehicle range extender in any one of the above; and configured to control the range extender to operate at the target speed.

[0013] The fourth aspect of the present application provides an electronic device, including: a processor; a memory, configured to store a computer program, and when the computer program is executed by the processor, it implements the method for establishing the power generation parameters of the vehicle range extender in any one of the above, or implements the control method of the vehicle range extender as described above.

[0014] The fifth aspect of the present application provides a computer-readable storage medium, in which a computer program is stored, and when the computer program is executed by the processor, it implements the method for establishing the power generation parameters of the vehicle range extender as described in any one of the above, or implements the control method of the vehicle range extender as described above.

[0015] The beneficial technical effects that this application at least possesses: Based on the power generation parameter establishment method, control method, device, and storage medium of the vehicle range extender provided by this application, it includes: obtaining the base power and base speed corresponding to a preset vehicle speed range under a preset optimal fuel-electric conversion rate; wherein, there are multiple preset vehicle speed ranges that do not overlap with each other; obtaining the vibration and noise data of the vehicle when the range extender operates at a debug power and a debug speed under the preset vehicle speed range; wherein, for each preset vehicle speed range, there are multiple debug powers and multiple debug speeds set correspondingly, the debug power is greater than or equal to the base power and the power difference between the two is less than a preset power value, and the speed difference between the debug speed and the base speed is less than a preset speed value; based on the vibration and noise data, obtaining the debug power and debug speed of the range extender corresponding to different preset vibration and noise standards under the preset vehicle speed range, and establishing the corresponding relationship between the preset vibration and noise standards and the debug power and debug speed under the preset vehicle speed range. Therefore, on the basis of the base power and base speed under the preset optimal fuel-electric conversion rate, the debug power and debug speed are formed, and further, the corresponding relationship between the preset vibration and noise standards and the debug power and debug speed is established according to the vibration and noise parameters corresponding to the debug power and debug speed. At this time, the speed of the range extender can be determined according to the current vehicle speed, the target vibration and noise standard, the current power, and the corresponding relationship. The range extender can obtain a good fuel-electric conversion rate at this speed and the vehicle has good NVH performance, and the balance between the fuel-electric conversion rate and NVH can be achieved.

[0016] The above description is only an overview of the technical solution of the embodiment of this application. In order to be able to understand the technical means of the embodiment of this application more clearly, it can be implemented according to the content of the description. And in order to make the above and other purposes, features, and advantages of the embodiment of this application more obvious and understandable, the specific implementation manners of this application are given below. Brief Description of the Drawings

[0017] The drawings are only used to illustrate the embodiments and are not considered as a limitation to this application. Moreover, throughout the drawings, the same reference signs are used to represent the same components. In the drawings:

[0018] Figure 1 is a flowchart of an embodiment of the power generation parameter establishment method of the vehicle range extender provided by this application;

[0019] Figure 2 is a characteristic diagram of the vehicle range extender;

[0020] Figure 3 is a flowchart of another embodiment of the power generation parameter establishment method of the vehicle range extender provided by this application;

[0021] Figure 4It is a schematic flowchart of another embodiment of the method for establishing power generation parameters of a vehicle range extender provided by this application;

[0022] Figure 5 It is a schematic flowchart of another embodiment of the method for establishing power generation parameters of a vehicle range extender provided by this application;

[0023] Figure 6 It is a schematic flowchart of an embodiment of the control method for a vehicle range extender provided by this application;

[0024] Figure 7 It is a schematic flowchart of another embodiment of the control method for a vehicle range extender provided by this application;

[0025] Figure 8 It is a structural block diagram of an embodiment of the control device for a vehicle range extender provided by this application;

[0026] Figure 9 It is a schematic structural framework diagram of an embodiment of an electronic device provided by this application;

[0027] Figure 10 It is a schematic structural framework diagram of an embodiment of a computer-readable storage medium provided by this application. Specific Embodiments

[0028] Hereinafter, exemplary embodiments of this application will be described in more detail with reference to the accompanying drawings. Although the exemplary embodiments of this application are shown in the drawings, it should be understood that this application can be implemented in various forms and should not be limited by the embodiments set forth herein. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in this application without creative efforts shall fall within the protection scope of this application.

[0029] If the descriptions in the embodiments of this application involve "first", "second", etc., such descriptions of "first", "second", etc. are only for descriptive purposes and should not be construed as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first", "second" may explicitly or implicitly include at least one of such features. In addition, the meaning of "and / or" appearing throughout the text is that it includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, or solution B, or a solution where A and B are satisfied simultaneously. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by this application.

[0030] The first aspect of this application provides a method for establishing power generation parameters of a vehicle range extender, Figure 1It is a schematic flowchart of an embodiment of the method for establishing the power generation parameters of the vehicle range extender provided by the present application. Combining Figure 1 , this method includes the following steps:

[0031] S11: Obtain the base power and base speed corresponding to a preset vehicle speed range of the range extender under a preset optimal fuel-electric conversion rate; wherein, there are multiple preset vehicle speed ranges and they do not overlap with each other.

[0032] It should be understood that the range extender of the vehicle includes an engine and a generator, and the engine burns fuel to drive the generator to work and generate electricity. The ratio of the amount of fuel burned by the engine to the electricity generated by the generator can be the fuel-electric conversion rate of the range extender. The higher the fuel-electric conversion rate of the range extender, the more electricity can be converted from the same amount of fuel.

[0033] Figure 2 It is a characteristic diagram of the vehicle range extender.

[0034] Combining Figure 2 , the abscissa represents the speed of the range extender, the ordinate represents the torque of the range extender, and the product of the speed and the torque is the power of the range extender, that is, the power generation power. Multiple curves 11 represent the power generation power of the range extender, multiple curves 12 represent the fuel-electric conversion rate of the range extender, and curve 13 represents the power generation power curve of the range extender under the preset optimal conversion rate.

[0035] There are multiple preset vehicle speed ranges, and the multiple preset vehicle speed ranges do not overlap with each other. At this time, the width of each preset vehicle speed range can be the same, that is, the difference between the maximum vehicle speed value and the minimum vehicle speed value of each preset vehicle speed range is the same. The division of the preset vehicle speed range can be divided more, so as to obtain more comprehensive data. For example, for the vehicle speed range of 0-150 km / h, it can be divided into 30 preset vehicle speed ranges according to the division standard of 5 km / h, or finer.

[0036] It should be understood that when the current vehicle speed of the vehicle is in different preset vehicle speed ranges, the driving power required by the vehicle is different, and we regard the driving power of the vehicle corresponding to each preset vehicle speed range as the same, that is, the power generation power of the range extender is the same at this time. Therefore, after determining the preset vehicle speed range, the power of the range extender can be determined, and this power is used as the base power of the range extender. After determining the base power of the range extender, the speed and torque of the range extender can be obtained according to curve 13, and the obtained speed is the base speed. It should be understood that during the test, under the preset optimal fuel conversion rate of the range extender, one preset vehicle speed range corresponds to one base power and one base speed.

[0037] S12: Obtain the vibration and noise data of the vehicle when the range extender operates at the debugging power and debugging speed within a preset vehicle speed range; wherein, multiple debugging powers and multiple debugging speeds are correspondingly set for the preset vehicle speed range, the debugging power is greater than or equal to the basic power and the power difference between the two is less than the preset power value, and the speed difference between the debugging speed and the basic speed is less than the preset speed value.

[0038] It should be understood that in the above step S11, the basic power and basic speed corresponding to the preset vehicle speed range are obtained. At this basic power and basic speed, the range extender has a good fuel-electric conversion rate. However, during the actual driving process of the vehicle, the actual power corresponding to the preset vehicle speed range is generally different from the basic power, and the actual power is generally greater than the basic power. Therefore, only the relationship between the basic power and the basic speed cannot meet the complex control requirements. Moreover, at the basic power and basic speed, although the range extender has good fuel-electric conversion performance, the NVH performance is not considered, and the NVH performance of the vehicle may be poor at this time. In this step, the application scenarios of the vehicle at different powers and the NVH performance of the vehicle will be considered, which will be described in detail below.

[0039] This step sets multiple debugging powers based on the basic power and multiple debugging speeds based on the basic speed. The maximum value of the debugging power is greater than or equal to the preset power value, and this preset power value can be a relatively small power, that is, although the debugging power is greater than the basic power, it will not be much larger, because during the actual driving process of the vehicle, although the actual power of the vehicle may be greater than the basic power, it will not be much larger. The debugging speed can be greater than or less than the basic speed, and no specific limitation is made here. The speed difference between the debugging speed and the basic speed is less than the preset speed value, and this preset speed value can be a not-too-large speed value.

[0040] For example, if the basic power is A (unit: W) and the preset power value is 10, then the debugging power can be A, A + 1, A + 2, A + 2, A + 3, A + 4, etc., and the number of debugging powers can be set according to the actual situation. The debugging speed is B (unit: revolutions per minute), and the preset speed value can be 300, then the debugging speed can be B + 50, B + 100, B + 150, B + 200, etc., and the number of debugging speeds can also be set according to the actual situation.

[0041] When there are multiple debugging powers and debugging speeds set, when the range extender operates at the debugging power and debugging speed, it can operate under different combinations of debugging power and debugging speed. For example, when the debugging power is A, the debugging speed can be B + 50, B + 100, B + 150, B + 200; when the debugging power is A + 1, the debugging speed can be B + 50, B + 100, B + 150, B + 200. That is, under different debugging powers, different debugging speeds can be corresponding, thus forming multiple pairs of combinations.

[0042] It should be understood that since the debugging power includes the base power, the vibration and noise parameters of the vehicle at different speeds under the base power of the range extender can be obtained. It should be understood that at the base power and base speed, the fuel-electric conversion performance of the range extender is better, but the NVH performance may be poor. At this time, by obtaining the vibration and noise parameters of the vehicle at different speeds under the base power, the vibration and noise levels at different speeds under the base power (by adjusting the torque to keep the base power unchanged) can be known. When the debugging power is different from the base power, the vibration and noise levels of the vehicle at different debugging powers and different debugging speeds can be obtained.

[0043] S13: Based on the vibration and noise data, obtain the debugging power and debugging speed of the range extender corresponding to different preset vibration and noise standards of the vehicle in the preset vehicle speed range, and establish the corresponding relationship between the preset vibration and noise standards and the debugging power and debugging speed in the preset vehicle speed range.

[0044] Based on the above steps, the vibration and noise standards of the vehicle when the range extender operates at different debugging powers and debugging speeds in different preset vehicle speed ranges can be obtained. Based on the differences in vibration and noise, multiple vibration and noise standards can be divided. For example, it can be divided into first-level vibration and noise standards, second-level vibration and noise standards, and third-level vibration and noise standards, etc., without specific limitations. At this time, different vibration and noise standards correspond to different NVH standards.

[0045] Combined with Figure 2 , at this time, curve 14 can represent the vibration and noise curve of the vehicle. The vibration and noise levels of the vehicle represented by two adjacent curves 14 are inconsistent, and the corresponding vibration and noise standards of the vehicle are inconsistent.

[0046] Therefore, in each preset vehicle speed range, according to the vibration and noise parameters corresponding to the debugging power and debugging speed, different combinations of debugging power and debugging speed can be classified into different combinations of vibration and noise standards, and then the corresponding relationship between the preset vibration and noise standards and the debugging power and debugging speed in the preset vehicle speed range can be established. For example, in the preset vehicle speed range of 60 - 65 km / h, under the first-level vibration and noise standard, the combinations of debugging power and debugging speed that meet the requirements are: A + 1, B + 50; A + 2, B + 100. That is, in the preset vehicle speed range of 60 - 65 km / h, when the range extender works at A + 1, B + 50 or A + 2, B + 100, the vehicle can meet the first-level vibration and noise standard.

[0047] Combined with the above embodiments, the corresponding relationship between the preset vibration and noise standards and the debugging power and debugging speed in the preset vehicle speed range can be established. Therefore, during the actual operation of the vehicle, if at a certain vehicle speed, it is required that the vehicle meet certain vibration and noise standards, then the rotation speed can be adjusted according to the power at which the vehicle is currently operating and this corresponding relationship, so that the vehicle can meet certain vibration and noise standards. Moreover, since the debugging power and debugging speed in the above corresponding relationship are obtained based on the basic power and basic speed, and the differences from the basic power and basic speed are not significant respectively. Therefore, when the vehicle operates at the debugging power and debugging speed, it can not only meet certain vibration and noise standards, but also obtain a better fuel-electricity conversion rate.

[0048] Figure 3 It is a schematic flowchart of another embodiment of the method for establishing the power generation parameters of the vehicle range extender provided by the present application.

[0049] Combined Figure 3 , in some specific embodiments, before the step of obtaining the vibration and noise data of the vehicle when the range extender works at the debugging power and debugging speed in the preset vehicle speed range, that is, before the above step S12, this method further includes:

[0050] S21: Obtain the first increased power of the range extender when the air conditioning system of the vehicle works at the maximum power compared with when the air conditioning system is not working.

[0051] It should be understood that the basic power and basic speed corresponding to the preset vehicle speed range under the preset optimal fuel-electricity conversion rate of the range extender generally do not consider the factor of the operation of the vehicle air conditioning system. Therefore, during actual driving, if the vehicle is driving in the preset vehicle speed range and the air conditioning system is working, then the operating power of the air conditioning system needs to be considered in the power generation power of the range extender.

[0052] At this time, the first increased power is the power of the range extender when the range extender generates electricity to support the air conditioning system to work at the maximum power.

[0053] S22: Determine the debugging power of the range extender based on the first increased power, so that the maximum value of the debugging power corresponding to the preset vehicle speed range is greater than or equal to the sum of the base power and the first increased power.

[0054] Because when the air conditioning system operates at the maximum power, the power that the range extender needs to increase is the first increased power. Therefore, during actual driving, when the vehicle speed is within the preset vehicle speed range, the actual power of the range extender may be greater than the sum of the base power and the first increased power.

[0055] Therefore, when setting the debugging power, it is necessary to consider that the maximum value of the debugging power is greater than or equal to the sum of the base power and the first increased power to cover the influence of the power of the range extender when the air conditioning system is working.

[0056] Therefore, in this embodiment, the influence of the operation of the vehicle air conditioning system on the operation of the range extender is considered, making the setting of the debugging power more in line with the actual working conditions of the range extender.

[0057] Figure 4 It is a schematic flowchart of another embodiment of the method for establishing the power generation parameters of the vehicle range extender provided by this application.

[0058] Combined with Figure 4 , in some specific embodiments, before the step of obtaining the vibration and noise data of the vehicle when the range extender operates at the debugging power and the debugging speed within the preset vehicle speed range, the method further includes:

[0059] S31: Obtain the second increased power of the range extender under different preset vehicle speed ranges, at the maximum test gradient and the maximum test load compared to at the preset gradient and the preset load.

[0060] It should be understood that the base power and the base speed corresponding to the preset vehicle speed range of the range extender under the preset optimal fuel-electric conversion rate generally do not consider the influence of the gradient of the vehicle driving section and the load of the vehicle itself. This embodiment introduces the influence of the gradient and the load on the power of the range extender to make the debugging power more in line with the actual working conditions of the vehicle.

[0061] It should be understood that the influence of the operation of the air conditioning system on the operation of the range extender has nothing to do with the vehicle speed. That is, at any preset vehicle speed range, when the air conditioning system operates at the same power, the influence on the power of the range extender is the same. However, the influence of the gradient and the load on the power of the range extender in this embodiment is related to the vehicle speed. Under other conditions unchanged, the greater the vehicle speed, the greater the influence of the gradient and the load on the range extender.

[0062] Therefore, in this embodiment, the second increased power of the range extender at different preset vehicle speed intervals under the maximum test gradient and the maximum test load compared to that under the preset gradient and the preset load is obtained. At this time, each preset vehicle speed interval corresponds to a second increased power. The maximum test gradient and the maximum test load can be set according to the working conditions of the vehicle in most driving scenarios. Among them, the basic gradient and the basic load can be the gradient and the load corresponding to the vehicle when measuring the basic power and the basic speed of the vehicle.

[0063] S32: Determine the maximum value of the debugging power of the range extender at different preset vehicle speed intervals based on the second increased power, so that the maximum value of the debugging power corresponding to the preset vehicle speed interval is greater than or equal to the sum of the basic power and the second increased power.

[0064] At this time, the second increased power takes into account the maximum influence of the gradient and the load on the power of the range extender in the preset vehicle speed interval. In order to ensure that the debugging power completely covers the influence of the gradient and the load on the power of the range extender, it is necessary to make the maximum value of the debugging power corresponding to the preset vehicle speed interval greater than or equal to the sum of the basic power and the second increased power.

[0065] Combining the above content, if the influences of the air conditioning system, the gradient, and the load on the range extender are considered at the same time, then at this time, the above embodiments can be combined. At this time, the maximum value of the debugging power of the range extender at different preset vehicle speed intervals is determined based on the first increased power and the second increased power, so that the maximum value of the debugging power corresponding to the preset vehicle speed interval is greater than or equal to the sum of the basic power, the first increased power, and the second increased power.

[0066] Figure 5 It is a schematic flowchart of another embodiment of the method for establishing the power generation parameters of the vehicle range extender provided by the present application. In some specific embodiments, after the step of obtaining the debugging power and the debugging speed of the range extender corresponding to different preset vibration and noise standards at the preset vehicle speed interval based on the vibration and noise data and establishing the corresponding relationship between the preset vibration and noise standards and the debugging power and the debugging speed at the preset vehicle speed interval, that is, after the above step S13, this method further includes:

[0067] S41: Determine the debugging power and the debugging speed that meet the preset fuel consumption performance and / or the preset power retention performance among the debugging power and the debugging speed of the range extender corresponding to the preset vibration and noise standards at the preset vehicle speed interval.

[0068] It should be understood that the corresponding relationship between the preset vibration and noise standards and the debugging power and the debugging speed obtained in the above step S31 at the preset vehicle speed interval establishes the debugging power and the debugging speed corresponding to the vibration and noise standards, but only considers the factors of vibration and noise. In this embodiment, the preset fuel consumption performance and / or the preset power retention performance are introduced.

[0069] Among the debugging power and debugging speed of the range extender corresponding to the preset vibration and noise standards, there may be many sets of debugging power and debugging speed. At this time, further test the fuel consumption performance and power retention performance of the vehicle under multiple sets of debugging power and debugging speed, and then obtain the debugging power and debugging speed that meet the preset fuel consumption performance and / or preset power retention performance. Among them, the fuel consumption performance can be measured according to the amount of fuel consumed per unit mileage of driving, and the power retention performance can be measured according to the real-time power retention status of the battery.

[0070] S42: Establish the corresponding relationship between the preset vibration and noise standards, preset fuel consumption performance and / or preset power retention performance, and the debugging power and debugging speed under the preset vehicle speed range.

[0071] After testing and selection, finally form the debugging power and debugging speed that meet the preset vibration and noise standards, preset fuel consumption performance and / or preset power retention performance. At this time, when the range extender works at this debugging power and debugging speed, the vehicle meets the preset vibration and noise standards and preset fuel consumption performance and / or preset power retention performance.

[0072] In summary, for the specific setting method of the debugging power and debugging speed in the above embodiments, in some specific embodiments, the power difference between two adjacent debugging powers is the same, and the difference between the two debugging powers corresponding to the preset vehicle speed range with a higher average vehicle speed is larger. Among them, the power difference between two adjacent debugging powers can be smaller, so as to obtain more data to better fit the actual working conditions. The basic power corresponding to the preset vehicle speed range with a higher average vehicle speed is actually larger. Therefore, when setting the debugging power, the difference between two adjacent debugging powers can be set larger, so as to minimize the data test volume on the premise of ensuring the data volume.

[0073] The vehicle speed difference between two adjacent debugging speeds is the same, and the difference between the two debugging speeds corresponding to the preset vehicle speed range with a higher average vehicle speed is larger. Similarly, the difference between two adjacent debugging speeds can be set smaller, so as to obtain more data. The basic speed corresponding to the preset vehicle speed range with a higher average vehicle speed is actually larger. Therefore, the difference between two adjacent debugging speeds can be set larger, so as to minimize the data test volume on the premise of ensuring the data volume.

[0074] Furthermore, the difference between the debugging speed and the basic speed corresponding to the preset vehicle speed range with a higher average vehicle speed is larger. Because the basic speed corresponding to the preset vehicle speed range with a higher average vehicle speed is higher, in order to ensure that a wider range of actual working conditions of the range extender can be covered, for the preset vehicle speed range with a higher vehicle speed, the difference between the debugging speed and the basic speed is set larger, that is, the difference between the maximum value of the debugging speed and the basic speed is larger.

[0075] Figure 6 It is a schematic flowchart of an embodiment of the control method of the vehicle range extender provided by this application.

[0076] Combined with Figure 6 , this method includes the following steps:

[0077] S101: Obtain the current vehicle speed, the target vibration and noise standard, and the current power of the range extender.

[0078] The current vehicle speed is the vehicle speed at the current moment. The target vibration and noise standard can be one of the preset vibration and noise standards. The driver and passengers can select a preset vibration and noise standard during the vehicle driving process and use it as the target vibration and noise standard, that is, the vibration and noise standard that the vehicle needs to meet during the subsequent driving process. The current power of the range extender is the working power of the range extender at the current moment. It should be understood that the power of the range extender may change over time.

[0079] S102: Based on the current vehicle speed, the target vibration and noise standard, the current power, and the corresponding relationship, obtain the debugging speed corresponding to the current vehicle speed, the target vibration and noise standard, and the current power, and use the debugging speed as the target speed; wherein, the corresponding relationship is obtained by the method for establishing the power generation parameters of the vehicle range extender according to any one of the above.

[0080] Based on the current vehicle speed, it can be obtained which preset vehicle speed interval the vehicle speed at the current moment is in, that is, the corresponding relationship in the method for establishing the power generation parameters corresponding to the preset vehicle speed interval can be initially selected. After obtaining the target vibration and noise standard, the debugging power and debugging speed under the preset vibration and noise standard corresponding to the target vibration and noise standard can be determined. At this time, there may be multiple sets of debugging power and debugging speed under the preset vibration and noise standard corresponding to the target vibration and noise standard. At this time, only when the range extender works under one of the multiple sets of debugging power and debugging speed can the vehicle meet the target vibration and noise standard at the current vehicle speed.

[0081] S103: Control the range extender to work at the target speed.

[0082] After obtaining the current power, the current power and the current speed corresponding to the current power may not be one of the multiple sets of debugging power and debugging speed, that is, the current speed corresponding to the current power may not be one of the multiple debugging speeds. At this time, in order to make the vehicle meet the target vibration and noise standard, it is necessary to adjust the speed of the range extender to the debugging speed corresponding to the current power, that is, adjust it to the target speed.

[0083] Therefore, based on this embodiment, the rotational speed of the range extender can be adjusted to the target rotational speed by using the corresponding relationship obtained in the above embodiment, so that the vehicle meets the target vibration and noise standards at the current vehicle speed.

[0084] Figure 7 It is a schematic flowchart of another embodiment of the control method for a vehicle range extender provided by the present application.

[0085] Combined with Figure 7 , in some specific embodiments, before the step of obtaining the current vehicle speed, the target vibration and noise standards, and the current power of the range extender, that is, before the above step S101, this method further includes the following steps:

[0086] S201: Obtain the current load of the vehicle and the current slope of the current driving section.

[0087] The current load of the vehicle is the load of the vehicle at the current moment, and the current slope is the slope of the section where the vehicle is traveling at the current moment.

[0088] S202: Based on the current slope and the current load, obtain the power change amount of the driving power of the vehicle compared with the preset slope and the preset load.

[0089] Under the condition that other conditions remain unchanged, the vehicle has a power when it is at the current slope and the current load, and the vehicle has a power when it is at the preset slope and the preset load. At this time, the power change amount can be obtained according to the difference between the two powers.

[0090] S203: Control the range extender to generate electricity at the target power to supply power to the drive motor through the range extender; wherein, the target power is the sum of the preset power and the power change amount, and the preset power is the power generation power of the range extender under the preset basic slope and the preset basic load of the vehicle.

[0091] It should be understood that in the prior art, the power generation power of the vehicle range extender should be consistent with the actual power of the vehicle. However, in the field of range extender power generation control technology, the actual power of the range extender is calculated according to the theoretical power of the vehicle. However, the calculation of the theoretical power of the vehicle does not consider the current load and the current slope of the vehicle. When the load and the slope are large, the actual power of the vehicle will be greater than the theoretical power of the vehicle, resulting in the power of the range extender not being able to meet the actual driving of the vehicle, causing the power in the battery pack to decrease and the power retention performance of the vehicle to be poor.

[0092] In this embodiment, by controlling the range extender to generate electricity at the target power, the power generation power of the vehicle range extender fully considers the current load and the current slope of the vehicle, so that the power generated by the vehicle range extender can meet the actual driving requirements of the vehicle and ensure better power retention performance of the vehicle.

[0093] It should be understood that through this embodiment, the vehicle can have good power retention performance. Based on this, when the vehicle has good power retention performance, the actual power of the vehicle range extender is generally different from the basic power described in the above embodiment, and is often greater than the basic power. At this time, since the debugging power is generally greater than the basic power, the vehicle can select the debugging speed corresponding to the debugging power equal to the actual power to work, so that the vehicle has good vibration and noise performance on the premise of having good power retention performance.

[0094] The third aspect of the present application provides a control device 20 for a vehicle range extender, Figure 8 which is a structural block diagram of an embodiment of the control device 20 for a vehicle range extender provided by the present application.

[0095] Combined with Figure 8 , the control device 20 for a vehicle range extender includes an acquisition module 21 and a control module 22. The acquisition module 21 is used to acquire the current vehicle speed, the target vibration and noise standard, and the current power of the range extender. The control module 22 is used to obtain the debugging speed corresponding to the current vehicle speed, the target vibration and noise standard, and the current power based on the current vehicle speed, the target vibration and noise standard, the current power, and the corresponding relationship, and use the debugging speed as the target speed; wherein, the corresponding relationship is obtained according to the method for establishing the power generation parameters of the vehicle range extender described in any of the above embodiments; and it is used to control the range extender to work at the target speed.

[0096] The fourth aspect of the present application provides an electronic device, including: a processor; a memory for storing a computer program, and when the computer program is executed by the processor, it implements the method for establishing the power generation parameters of the vehicle range extender in any of the above embodiments, or implements the control method of the vehicle range extender in any of the above embodiments.

[0097] Figure 9 which is a schematic structural framework diagram of an embodiment of the electronic device 500 provided by the present application.

[0098] In some specific embodiments, the electronic device 500 includes a Central Processing Unit (CPU) 501 and a Read-Only Memory (ROM) 502. The Central Processing Unit 501 is the processor, and the Read-Only Memory (ROM) 502 is the memory. The Central Processing Unit 501 can perform various appropriate actions and processes according to the program stored in the Read-Only Memory (ROM) 502 or the program loaded from the storage section 508 into the Random Access Memory (RAM) 503, such as executing the method in the above embodiments. In the RAM 503, various programs and data required for system operations are also stored. The CPU 501, ROM 502, and RAM 503 are connected to each other via a bus 504. An Input / Output (I / O) interface 505 is also connected to the bus 504.

[0099] The following components are connected to the I / O interface 505: an input section 506 including a keyboard, a mouse, etc.; an output section 507 including, for example, a Cathode Ray Tube (CRT), a Liquid Crystal Display (LCD), etc. and a speaker, etc.; a storage section 508 including a hard disk, etc.; and a communication section 509 including a network interface card such as a LAN (Local Area Network) card, a modem, etc. The communication section 509 performs communication processing via a network such as the Internet. A drive 510 is also connected to the I / O interface 505 as needed. A removable medium 511, such as a magnetic disk, an optical disk, a magneto-optical disk, a semiconductor memory, etc., is installed on the drive 510 as needed so that a computer program read from it can be installed into the storage section 508 as needed.

[0100] Specifically, according to the embodiments of the present application, the process described above with reference to the flowchart can be implemented as a computer software program. For example, the embodiments of the present application include a computer program product that includes a computer program carried on a computer-readable medium, and the computer program includes a computer program for executing the method shown in the flowchart. In such an embodiment, the computer program can be downloaded and installed from the network through the communication section 509 and / or installed from the removable medium 511. When the computer program is executed by the Central Processing Unit (CPU) 501, various functions defined in the system of the present application are executed.

[0101] The fifth aspect of the present application provides a computer-readable storage medium 40. Figure 10It is a schematic structural framework diagram of an embodiment of the computer-readable storage medium 40 provided by this application.

[0102] A computer program 41 is stored on the computer-readable storage medium 40. When the computer program 41 is executed by a processor, it implements the method for establishing power generation parameters of a vehicle range extender as described in any of the above embodiments, or implements the control method of a vehicle range extender as described in any of the above embodiments.

[0103] It should be noted that the computer-readable medium 40 shown in the embodiments of this application can be a computer-readable signal medium, a computer-readable storage medium, or any combination of the two. A computer-readable storage medium can be, for example, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination of the above. More specific examples of a computer-readable storage medium can include, but are not limited to: an electrical connection with one or more wires, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM), a flash memory, an optical fiber, a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the above. In this application, a computer-readable storage medium can be any tangible medium that contains or stores a program, and this program can be used by or combined with an instruction execution system, apparatus, or device. And in this application, a computer-readable signal medium can include a data signal propagated in a baseband or as part of a carrier wave, which carries a computer-readable computer program. Such a propagated data signal can take various forms, including but not limited to electromagnetic signals, optical signals, or any suitable combination of the above. A computer-readable signal medium can also be any computer-readable medium other than a computer-readable storage medium, and this computer-readable medium can send, propagate, or transmit a program for use by or combined with an instruction execution system, apparatus, or device. The computer program contained on the computer-readable medium can be transmitted by any suitable medium, including but not limited to: wireless, wired, etc., or any suitable combination of the above.

[0104] In summary, based on the method, control method, device and storage medium for establishing the power generation parameters of the vehicle range extender provided by the present application, it includes: obtaining the base power and base speed corresponding to the preset vehicle speed range of the range extender at the preset optimal fuel-electric conversion rate; wherein, there are multiple non-overlapping preset vehicle speed ranges; obtaining the vibration and noise data of the vehicle when the range extender operates at the debugging power and debugging speed in the preset vehicle speed range; wherein, multiple debugging powers and multiple debugging speeds are correspondingly set for the preset vehicle speed range, the debugging power is greater than or equal to the base power and the power difference between the two is less than the preset power value, and the speed difference between the debugging speed and the base speed is less than the preset speed value; based on the vibration and noise data, obtaining the debugging power and debugging speed of the range extender corresponding to different preset vibration and noise standards of the vehicle in the preset vehicle speed range, and establishing the corresponding relationship between the preset vibration and noise standards and the debugging power and debugging speed in the preset vehicle speed range. Therefore, on the basis of the base power and base speed at the preset optimal fuel-electric conversion rate, the debugging power and debugging speed are formed, and further, the corresponding relationship between the preset vibration and noise standards and the debugging power and debugging speed is established according to the vibration and noise parameters corresponding to the debugging power and debugging speed. At this time, the speed of the range extender can be determined according to the current vehicle speed, the target vibration and noise standard, the current power and the corresponding relationship. The range extender can obtain a good fuel-electric conversion rate at this speed and the vehicle has good NVH performance, and the balance between the fuel-electric conversion rate and NVH can be achieved.

[0105] The above content is only a preferred exemplary embodiment of the present application and is not used to limit the implementation of the present application. Those of ordinary skill in the art can make corresponding changes or modifications very conveniently according to the main idea and spirit of the present application. Therefore, the protection scope of the present application should be subject to the protection scope required by the claims.

Claims

1. A method for establishing power generation parameters of a vehicle range extender, characterized in that, Including: Obtain the base power and base speed corresponding to a preset vehicle speed range of the range extender at a preset optimal fuel - electricity conversion rate; wherein, there are multiple non - overlapping preset vehicle speed ranges; Obtain the vibration and noise data of the vehicle when the range extender operates at a debugging power and a debugging speed in the preset vehicle speed range; wherein, multiple debugging powers and multiple debugging speeds are correspondingly set for the preset vehicle speed range, the debugging power is greater than or equal to the base power and the power difference between the two is less than a preset power value, and the speed difference between the debugging speed and the base speed is less than a preset speed value; Based on the vibration and noise data, obtain the debugging power and debugging speed of the range extender corresponding to different preset vibration and noise standards of the vehicle in the preset vehicle speed range, and establish a corresponding relationship between the preset vibration and noise standards and the debugging power and the debugging speed in the preset vehicle speed range.

2. The method for establishing power generation parameters according to claim 1, wherein Before the step of obtaining the vibration and noise data of the vehicle when the range extender operates at a debugging power and a debugging speed in the preset vehicle speed range, the method further includes: Obtain the first increased power of the range extender when the air - conditioning system of the vehicle operates at the maximum power compared to when the air - conditioning system does not work; Based on the first increased power, determine the debugging power of the range extender so that the maximum value of the debugging power corresponding to the preset vehicle speed range is greater than or equal to the sum of the base power and the first increased power.

3. The method for establishing power generation parameters according to claim 1, wherein Before the step of obtaining the vibration and noise data of the vehicle when the range extender operates at a debugging power and a debugging speed in the preset vehicle speed range, the method further includes: Obtain the second increased power of the range extender at different preset vehicle speed ranges under the maximum test slope and maximum test load compared to under a preset slope and preset load; Based on the second increased power, determine the maximum value of the debugging power of the range extender at different preset vehicle speed ranges so that the maximum value of the debugging power corresponding to the preset vehicle speed range is greater than or equal to the sum of the base power and the second increased power.

4. The method for establishing the power generation parameters according to claim 1, wherein After the step of obtaining the debugging power and debugging speed of the range extender corresponding to different preset vibration and noise standards of the vehicle in the preset vehicle speed range based on the vibration and noise data and establishing a corresponding relationship between the preset vibration and noise standards and the debugging power and the debugging speed in the preset vehicle speed range, the method further includes: Determine the debugging power and debugging speed that meet the preset fuel consumption performance and / or preset power - retaining performance among the debugging power and debugging speed of the range extender corresponding to the preset vibration and noise standards of the vehicle in the preset vehicle speed range; Establish the corresponding relationship between the preset vibration and noise standards, the preset fuel consumption performance and / or the preset power retention performance, and the debugging power and the debugging speed within the preset vehicle speed range.

5. The method for establishing the power generation parameters according to claim 1, wherein the power difference between two adjacent debugging powers is the same, and the difference between the two debugging powers corresponding to the preset vehicle speed range with a higher average vehicle speed is larger; the vehicle speed difference between two adjacent debugging speeds is the same, and the difference between the two debugging speeds corresponding to the preset vehicle speed range with a higher average vehicle speed is larger; the difference between the debugging speed corresponding to the preset vehicle speed range with a higher average vehicle speed and the base speed is larger.

6. A control method for a vehicle range extender, characterized in that, It includes: Obtain the current vehicle speed of the vehicle, the target vibration and noise standards, and the current power of the range extender. Based on the current vehicle speed, the target vibration and noise standards, the current power, and the corresponding relationship, obtain the debugging speed corresponding to the current vehicle speed, the target vibration and noise standards, and the current power, and use the debugging speed as the target speed; wherein, the corresponding relationship is obtained according to the method for establishing the power generation parameters of the vehicle range extender described in any one of claims 1-5. Control the range extender to operate at the target speed.

7. The control method according to claim 6, wherein before the step of obtaining the current vehicle speed of the vehicle, the target vibration and noise standards, and the current power of the range extender, it includes: Obtain the current load of the vehicle and the current slope of the current driving section. Based on the current slope and the current load, obtain the power change amount of the driving power of the vehicle compared with the preset slope and the preset load. Control the range extender to generate electricity at the target power to supply power to the drive motor through the range extender; wherein, the target power is the sum of the preset power and the power change amount, and the preset power is the power generation power of the range extender when the vehicle is at the preset basic slope and the preset basic load.

8. A control device for a vehicle range extender, characterized in that, It includes: An acquisition module for obtaining the current vehicle speed of the vehicle, the target vibration and noise standards, and the current power of the range extender. A control module for obtaining the debugging speed corresponding to the current vehicle speed, the target vibration and noise standards, and the current power based on the current vehicle speed, the target vibration and noise standards, the current power, and the corresponding relationship, and using the debugging speed as the target speed; wherein, the corresponding relationship is obtained according to the method for establishing the power generation parameters of the vehicle range extender described in any one of claims 1-5; and for controlling the range extender to operate at the target speed.

9. An electronic device, characterized in that, It includes: A processor; A memory for storing a computer program, and when the computer program is executed by the processor, it implements the method for establishing the power generation parameters of the vehicle range extender described in any one of claims 1-5, or implements the control method of the vehicle range extender described in claim 6 or 7.

10. A computer-readable storage medium, characterized in that, The storage medium stores a computer program, which when executed by a processor implements the method for establishing power generation parameters of a vehicle range extender as described in any one of claims 1-5, or implements the control method of a vehicle range extender as described in claim 6 or 7.

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