Control method and device of range extender, vehicle and medium

Abstract

The application discloses a control method and device of a range extender, a vehicle and a medium, and relates to the technical field of vehicles. The method comprises the following steps: acquiring a driving mode of the vehicle, a required power of the range extender and a target optimal power of the range extender; determining the power generation of the range extender according to the driving mode of the vehicle, the required power of the range extender and the target optimal power; determining the target rotating speed and the target power generation torque of the range extender according to the power generation of the range extender, and controlling the range extender according to the target rotating speed and the target power generation torque. According to different driving modes and energy management modes, the control method sets different control strategies of the range extender, so that the requirements of the driver can be better met, the power economy of the vehicle can be improved, and the driving pleasure can be increased.

Description

Technical Field

[0001] This invention relates to the field of vehicle technology, and in particular to a control method for a range extender, a control device for a range extender, a computer-readable storage medium, and a vehicle. Background Technology

[0002] Current technologies for series-connected range-extended electric vehicles typically control the range extender based on the battery charge level, primarily focusing on power generation. When the battery charge is high, the range extender shuts off; when the battery charge drops to a certain level, the range extender activates to generate electricity. The power output of the range extender is controlled according to the vehicle's driving power requirements, ensuring that the power generated by the range extender meets the vehicle's driving needs. This method is relatively simplistic and does not consider factors such as the vehicle's driving modes and operating conditions. It struggles to provide a variety of driving experiences across different driving modes and has poor adaptability to various operating conditions, resulting in less than ideal performance and fuel economy. Summary of the Invention

[0003] This invention aims to at least partially solve one of the technical problems in related technologies. To this end, the first objective of this invention is to propose a control method for a range extender, which involves obtaining the vehicle's driving mode, the range extender's required power, and the range extender's target optimal power; determining the range extender's power generation capacity based on the vehicle's driving mode, the range extender's required power, and the target optimal power; determining the range extender's target speed and target power generation torque based on the range extender's power generation capacity; and controlling the range extender based on the target speed and target power generation torque. This control method sets different range extender control strategies according to different driving modes and energy management modes, thus better meeting the driver's needs, improving not only the vehicle's power and economy but also increasing driving pleasure.

[0004] The second objective of this invention is to provide a control device for a range extender.

[0005] A third objective of this invention is to provide a computer-readable storage medium.

[0006] The fourth objective of this invention is to provide a vehicle.

[0007] To achieve the above objectives, a first aspect of the present invention provides a control method for a range extender, the method comprising: acquiring a vehicle's driving mode, the range extender's required power, and the range extender's target optimal power; determining the range extender's power generation capacity based on the vehicle's driving mode, the range extender's required power, and the target optimal power; determining the range extender's target speed and target power generation torque based on the range extender's power generation capacity; and controlling the range extender based on the target speed and target power generation torque.

[0008] According to one embodiment of the present invention, determining the power generation capacity of the range extender based on the vehicle's driving mode, the range extender's required power, and the target optimal power includes: when the vehicle's driving mode is a first driving mode, if the range extender's required power is less than or equal to the difference between the target optimal power and a preset offset power, then the difference between the target optimal power and the preset offset power is used as the range extender's power generation capacity; if the range extender's required power is greater than the difference between the target optimal power and the preset offset power, then the range extender's required power is used as the range extender's power generation capacity.

[0009] According to one embodiment of the present invention, determining the power generation capacity of the range extender based on the vehicle's driving mode, the range extender's required power, and the target optimal power includes: when the vehicle's driving mode is a second driving mode, if the range extender's required power is less than or equal to the difference between the target optimal power and a preset offset power, or if the range extender's required power is greater than the difference between the target optimal power and the preset offset power and less than or equal to the sum of the target optimal power and the preset offset power, or if the range extender's required power is greater than the sum of the target optimal power and the preset offset power, then the range extender's required power is taken as the range extender's power generation capacity.

[0010] According to one embodiment of the present invention, determining the power generation capacity of the range extender based on the vehicle's driving mode, the range extender's required power, and the target optimal power includes: when the vehicle's driving mode is a third driving mode, if the range extender's required power is less than or equal to the sum of the target optimal power and the preset offset power, then the range extender's required power is used as the range extender's power generation capacity; if the range extender's required power is greater than the sum of the target optimal power and the preset offset power, then the sum of the target optimal power and the preset offset power is used as the range extender's power generation capacity.

[0011] According to one embodiment of the present invention, determining the target speed of the range extender based on the power generation of the range extender includes: determining the target speed of the range extender based on the power generation of the range extender and a first preset table, wherein the first preset table is used to characterize the correspondence between the power generation of the range extender and the speed of the range extender.

[0012] According to one embodiment of the present invention, determining the target speed of the range extender based on its power generation includes: determining the target speed of the range extender based on its power generation and a first preset table when the required power of the range extender is less than or equal to the difference between the target optimal power and the preset offset power, or when the required power of the range extender is greater than the sum of the target optimal power and the preset offset power; and determining the target speed of the range extender based on its power generation and a second preset table when the required power of the range extender is greater than the difference between the target optimal power and the preset offset power and less than or equal to the sum of the target optimal power and the preset offset power. The second preset table is used to characterize the correspondence between the optimal NVH at the range extender's power generation and the range extender's speed.

[0013] According to one embodiment of the present invention, determining the target generating torque of the range extender based on the generating power of the range extender includes: determining the target generating torque based on the generating power of the range extender and the target rotational speed of the range extender.

[0014] To achieve the above objectives, a second aspect of the present invention provides a control device for a range extender, the device comprising: an acquisition module for acquiring a vehicle's driving mode, the range extender's required power, and the range extender's target optimal power; a first determination module for determining the range extender's power generation capacity based on the vehicle's driving mode, the range extender's required power, and the target optimal power; a second determination module for determining the range extender's target speed and target power generation torque based on the range extender's power generation capacity; and a control module for controlling the range extender based on the target speed and target power generation torque.

[0015] To achieve the above objectives, a third aspect of the present invention provides a computer-readable storage medium storing a control program for a range extender, which, when executed by a processor, implements the aforementioned control method for the range extender.

[0016] To achieve the above objectives, a fourth aspect of the present invention provides a vehicle including a memory, a processor, and a range extender control program stored in the memory and executable on the processor. When the processor executes the range extender control program, it implements the aforementioned range extender control method.

[0017] According to embodiments of the present invention, a control method, apparatus, vehicle, and medium for a range extender acquire the vehicle's driving mode, the range extender's required power, and the range extender's target optimal power; determine the range extender's power generation capacity based on the vehicle's driving mode, the range extender's required power, and the target optimal power; determine the range extender's target speed and target power generation torque based on the range extender's power generation capacity; and control the range extender based on the target speed and target power generation torque. The control method of the present invention sets different range extender control strategies according to different driving modes and energy management modes, thereby better meeting the driver's needs, improving not only the vehicle's power and economy but also increasing driving pleasure. Attached Figure Description

[0018] Figure 1 A flowchart of a control method for a range extender according to some embodiments of the present invention;

[0019] Figure 2 This is a schematic diagram of the working area of ​​a range extender according to some embodiments of the present invention;

[0020] Figure 3 This is a block diagram of a control device for a range extender according to some embodiments of the present invention;

[0021] Figure 4 This is a block diagram of a vehicle according to some embodiments of the present invention. Detailed Implementation

[0022] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0023] The control method, apparatus, vehicle, and medium of the range extender according to embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0024] Figure 1 This is a flowchart of a control method for a range extender according to some embodiments of the present invention. (Refer to...) Figure 1 The control method for the range extender in this application embodiment may include the following steps:

[0025] S110 obtains the vehicle's driving mode, the range extender's required power, and the range extender's target optimal power.

[0026] Specifically, the vehicle's driving modes can include a first driving mode, a second driving mode, and a third driving mode. The first driving mode is Sport mode, which provides a more responsive acceleration and higher power output, enhancing driving pleasure. The second driving mode is Comfort mode, where acceleration and power output are smoother, and engine speeds are kept at lower levels to reduce noise and vibration. The third driving mode is Eco mode, where acceleration is more gradual, minimizing energy consumption.

[0027] The power requirement of a range extender can be determined based on the expected increase in driving range, driving energy consumption, battery charging efficiency, and range extender power generation efficiency. For example, the amount of electricity required to achieve the expected increase in driving range can be determined based on the expected increase in driving range and driving energy consumption; the amount of electricity required to replenish the battery can be determined based on the amount of electricity required to replenish the vehicle's expected increase in driving range and battery charging efficiency; and the power requirement of the range extender can be determined based on the amount of electricity required to replenish the battery and the range extender power generation efficiency. Specific methods for determining the power requirement of a range extender are not limited here.

[0028] The target optimal power of the range extender can be determined based on the efficiency characteristic data of the range extender. For example, the efficiency characteristic data of the range extender consists of multiple sets of range extender operating efficiencies and corresponding power at different range extender speeds and generator torques. The power corresponding to the optimal efficiency of the range extender is the target optimal power of the range extender.

[0029] S120 determines the power output of the range extender based on the vehicle's driving mode, the range extender's power requirements, and the target optimal power.

[0030] Specifically, based on the target optimal power, the range extender's operating area can be divided into a first operating area, a second operating area, a third operating area, and a fourth operating area. After determining the vehicle's driving mode, the operating area of ​​the range extender is determined based on its required power, and then the range extender's power generation capacity is determined based on its operating area.

[0031] S130 determines the target speed and target generating torque of the range extender based on its generating power, and controls the range extender based on the target speed and target generating torque.

[0032] Specifically, the target speed of the range extender can be determined by querying a two-dimensional mapping table between the range extender's power generation and its target speed. This two-dimensional mapping table includes the power generation of multiple range extenders and the target speed corresponding to each range extender's power generation. The two-dimensional mapping table can be either a first preset table or a second preset table.

[0033] For example, if the target speed of the range extender is determined by querying a first preset table based on the power output of the range extender, the target power output torque can be determined based on the mapping relationship between the target speed and the target power output torque. Controlling the range extender based on the target speed and the target power output torque can ensure the working efficiency of the range extender to a certain extent. If the target speed of the range extender is determined by querying a second preset table based on the power output of the range extender, the target power output torque can be determined based on the mapping relationship between the target speed and the target power output torque. Controlling the range extender based on the target speed and the target power output torque can ensure that the operating noise of the range extender is relatively low to a certain extent.

[0034] The control method of this invention sets different range extender control strategies according to different driving modes and energy management modes, thus better meeting the needs of the driver, improving not only the vehicle's power and economy, but also increasing driving pleasure.

[0035] In some embodiments, the target optimal power P_best is offset vertically by a preset offset power ΔP to obtain the difference between the target optimal power and the preset offset power, P_best-ΔP, and the sum of the target optimal power and the preset offset power, P_best+ΔP. Based on the target optimal power P_best, the difference between the target optimal power and the preset offset power, P_best-ΔP, and the sum of the target optimal power and the preset offset power, P_best+ΔP, corresponding isopower lines are drawn, defining the four working regions of the range extender: a first working region, a second working region, a third working region, and a fourth working region. Figure 2 As shown. The preset offset power can be determined according to the actual situation. For example, the preset offset power can be 10kW, and there is no specific limit here.

[0036] Reference Figure 2 If the range extender's required power is less than or equal to the difference between the target optimal power and the preset offset power, P_best - ΔP, then the range extender's required power is determined to be in the first working region. If the range extender's required power is greater than the difference between the target optimal power and the preset offset power, P_best - ΔP, but less than or equal to the target optimal power, P_best, then the range extender's required power is determined to be in the second working region. If the range extender's required power is greater than the target optimal power, P_best, but less than or equal to the sum of the target optimal power and the preset offset power, P_best + ΔP, then the range extender's required power is determined to be in the third working region. If the range extender's required power is greater than the sum of the target optimal power and the preset offset power, P_best + ΔP, but less than or equal to the range extender's maximum power, P_max, then the range extender's required power is determined to be in the fourth working region.

[0037] Specifically, the range extender's efficiency is relatively low when it is in the first and fourth working regions, and relatively high when it is in the second and third working regions.

[0038] In some embodiments, determining the power generation capacity of the range extender based on the vehicle's driving mode, the range extender's required power, and the target optimal power includes: when the vehicle's driving mode is a first driving mode, if the range extender's required power is less than or equal to the difference between the target optimal power and the preset offset power, then the difference between the target optimal power and the preset offset power is used as the range extender's power generation capacity; if the range extender's required power is greater than the difference between the target optimal power and the preset offset power, then the range extender's required power is used as the range extender's power generation capacity.

[0039] For example, when the vehicle's driving mode is the first driving mode (sport mode), if the range extender's required power is less than or equal to the difference between the target optimal power and the preset offset power, P_best-△P, that is, the range extender is in the first working area and the range extender's working efficiency is relatively low, then the difference between the target optimal power and the preset offset power, P_best-△P, is used as the range extender's power generation. This can, to some extent, prevent the range extender from working in the inefficient first working area, improve economy, and at the same time, the range extender's power generation can meet the range extender's required power, appropriately increasing power generation to meet the needs of the first driving mode (sport mode).

[0040] If the range extender's required power is greater than the difference between the target optimal power and the preset offset power, P_best-△P, that is, the range extender is in the second, third, or fourth working area, then the range extender's required power will be used as the range extender's power generation.

[0041] In some embodiments, determining the power generation capacity of the range extender based on the vehicle's driving mode, the range extender's required power, and the target optimal power includes: when the vehicle's driving mode is a second driving mode, if the range extender's required power is less than or equal to the difference between the target optimal power and the preset offset power, or if the range extender's required power is greater than the difference between the target optimal power and the preset offset power and less than or equal to the sum of the target optimal power and the preset offset power, or if the range extender's required power is greater than the sum of the target optimal power and the preset offset power, then the range extender's required power is taken as the range extender's power generation capacity.

[0042] For example, when the vehicle's driving mode is the second driving mode (comfort mode), if the range extender's required power is less than or equal to the difference between the target optimal power and the preset offset power, P_best-△P, that is, the range extender is in the first working area, then the range extender's required power is used as the range extender's power generation.

[0043] If the range extender's required power is greater than the difference between the target optimal power and the preset offset power, P_best-△P, and less than or equal to the sum of the target optimal power and the preset offset power, P_best+△P, that is, the range extender is in the second or third working region, then the range extender's required power will also be used as the range extender's power generation.

[0044] If the range extender's required power is greater than the sum of the target optimal power and the preset offset power, P_best+△P, meaning the range extender is in the fourth working region, then the range extender's required power will also be used as the range extender's power generation.

[0045] In some embodiments, determining the power generation capacity of the range extender based on the vehicle's driving mode, the range extender's required power, and the target optimal power includes: when the vehicle's driving mode is a third driving mode, if the range extender's required power is less than or equal to the sum of the target optimal power and the preset offset power, then the range extender's required power is used as the range extender's power generation capacity; if the range extender's required power is greater than the sum of the target optimal power and the preset offset power, then the sum of the target optimal power and the preset offset power is used as the range extender's power generation capacity.

[0046] For example, when the vehicle's driving mode is the third driving mode (economy mode), if the range extender's required power is less than or equal to the sum of the target optimal power and the preset offset power, P_best+△P, that is, the range extender is in the first working area, the second working area, or the third working area, then the range extender's required power is taken as the range extender's power generation.

[0047] If the range extender's required power is greater than the sum of the target optimal power and the preset offset power, P_best+△P, then the range extender is in the fourth operating region, where its efficiency is relatively low. In this case, the sum of the target optimal power and the preset offset power, P_best+△P, is used as the range extender's power output. This can, to some extent, prevent the range extender from operating in the less efficient fourth operating region and improve its economic efficiency.

[0048] In some embodiments, determining the target speed of the range extender based on its power generation includes: determining the target speed of the range extender based on its power generation and a first preset table, wherein the first preset table is used to characterize the correspondence between the power generation of the range extender and the speed of the range extender.

[0049] Specifically, when the vehicle's driving mode is the first driving mode (sport mode) or the third driving mode (economy mode), the target speed of the range extender is determined by looking up the first preset table based on the power generation of the range extender. The first preset table is the range extender speed corresponding to the optimal working efficiency of the range extender under different power levels, obtained by mathematical interpolation based on the range extender efficiency characteristic data. The first preset table is shown in Table 1.

[0050] Table 1

[0051] power rotational speed efficiency P11 n11 Eff11_best P12 n12 Eff12_best P13 n13 Eff13_best …… …… …… …… …… ……

[0052] In other words, the range extender operates at the target speed obtained by querying the first preset table, which can ensure the working efficiency of the range extender to a certain extent.

[0053] In some embodiments, determining the target speed of the range extender based on its power generation includes: determining the target speed of the range extender based on its power generation and a first preset table when the required power of the range extender is less than or equal to the difference between the target optimal power and the preset offset power, or when the required power of the range extender is greater than the sum of the target optimal power and the preset offset power; and determining the target speed of the range extender based on its power generation and a second preset table when the required power of the range extender is greater than the difference between the target optimal power and the preset offset power and less than or equal to the sum of the target optimal power and the preset offset power. The second preset table is used to characterize the correspondence between the optimal NVH at the range extender's power generation and the range extender's speed.

[0054] Specifically, when the vehicle is in the second driving mode (economy mode), if the range extender's power demand is less than or equal to the difference between the target optimal power and the preset offset power, P_best - ΔP, meaning the range extender's power demand is in the first operating region; or, if the range extender's power demand is greater than the sum of the target optimal power and the preset offset power, P_best + ΔP, meaning the range extender's power demand is in the fourth operating region, the range extender's efficiency is relatively low. Therefore, it is necessary to determine the target speed of the range extender based on its power generation capacity by consulting the first preset table, while also considering the range extender's efficiency.

[0055] If the range extender's required power is greater than the difference between the target optimal power and the preset offset power, P_best-ΔP, and less than or equal to the sum of the target optimal power and the preset offset power, P_best+ΔP, then the range extender's required power is in the second or third operating region. At this time, the range extender's operating efficiency is relatively high. The target speed of the range extender is mainly determined based on comfort requirements. For example, the target speed of the range extender can be determined by consulting the second preset table based on the range extender's power generation. The second preset table is the range extender speed corresponding to the optimal NVH (Noise, Vibration, and Harshness) of the range extender under different power levels, obtained by mathematical interpolation based on the range extender's efficiency characteristic data. The second preset table is shown in Table 2.

[0056] Table 2

[0057] power rotational speed efficiency P21 n21 NVH11_best P22 n22 NVH12_best P23 n23 NVH13_best …… …… …… …… …… ……

[0058] In other words, the range extender operates at the target speed obtained by querying the second preset table, which can ensure that the operating noise of the range extender is relatively low to a certain extent.

[0059] In some embodiments, determining the target generating torque of the range extender based on its generating power includes: determining the target generating torque based on the generating power of the range extender and the target rotational speed of the range extender.

[0060] For example, the target generating torque of the range extender can be determined by the following formula:

[0061] T_dmd=P_dmd*9549 / n_dmd

[0062] Where T_dmd represents the target generating torque of the range extender, P_dmd represents the generating power of the range extender, and n_dmd represents the target speed of the range extender.

[0063] In summary, the control method of this invention sets different range extender control strategies according to different driving modes and energy management modes, thus better meeting the needs of the driver, improving not only the overall vehicle's power and economy, but also increasing driving pleasure.

[0064] Corresponding to the above embodiments, this application also proposes a control device for a range extender.

[0065] In some embodiments, refer to Figure 3 The control device 200 for the range extender includes: an acquisition module 210, a first determination module 220, a second determination module 230, and a control module 240.

[0066] The acquisition module 210 is used to acquire the vehicle's driving mode, the range extender's required power, and the range extender's target optimal power. The first determination module 220 is used to determine the range extender's power generation capacity based on the vehicle's driving mode, the range extender's required power, and the target optimal power. The second determination module 230 is used to determine the range extender's target speed and target power generation torque based on the range extender's power generation capacity. The control module 240 is used to control the range extender based on the target speed and target power generation torque.

[0067] According to one embodiment of the present invention, the first determining module 220 is specifically used to, when the driving mode of the vehicle is the first driving mode, if the power demand of the range extender is less than or equal to the difference between the target optimal power and the preset offset power, then the difference between the target optimal power and the preset offset power is used as the power generation power of the range extender; if the power demand of the range extender is greater than the difference between the target optimal power and the preset offset power, then the power demand of the range extender is used as the power generation power of the range extender.

[0068] According to one embodiment of the present invention, the first determining module 220 is specifically used to, when the driving mode of the vehicle is the second driving mode, if the required power of the range extender is less than or equal to the difference between the target optimal power and the preset offset power, or if the required power of the range extender is greater than the difference between the target optimal power and the preset offset power and less than or equal to the sum of the target optimal power and the preset offset power, or if the required power of the range extender is greater than the sum of the target optimal power and the preset offset power, then the required power of the range extender is taken as the power generation power of the range extender.

[0069] According to one embodiment of the present invention, the first determining module 220 is specifically used to, when the driving mode of the vehicle is the third driving mode, if the required power of the range extender is less than or equal to the sum of the target optimal power and the preset offset power, then the required power of the range extender is taken as the power generation power of the range extender; if the required power of the range extender is greater than the sum of the target optimal power and the preset offset power, then the sum of the target optimal power and the preset offset power is taken as the power generation power of the range extender.

[0070] According to one embodiment of the present invention, the second determining module 230 is specifically used to determine the target speed of the range extender based on the power generation of the range extender and a first preset table, wherein the first preset table is used to characterize the correspondence between the power generation of the range extender and the speed of the range extender.

[0071] According to one embodiment of the present invention, the second determining module 230 is specifically configured to: determine the target speed of the range extender based on the power generation of the range extender and a first preset table when the required power of the range extender is less than or equal to the difference between the target optimal power and the preset offset power, or when the required power of the range extender is greater than the sum of the target optimal power and the preset offset power; and determine the target speed of the range extender based on the power generation of the range extender and a second preset table when the required power of the range extender is greater than the difference between the target optimal power and the preset offset power and less than or equal to the sum of the target optimal power and the preset offset power. The second preset table is configured to represent the correspondence between the optimal NVH at the power generation of the range extender and the speed of the range extender.

[0072] According to one embodiment of the present invention, the second determining module 230 is further configured to determine the target generating torque based on the generating power of the range extender and the target rotational speed of the range extender.

[0073] It should be noted that the above explanation of the embodiments and beneficial effects of the control method for the range extender also applies to the control device of the range extender in the embodiments of the present invention. To avoid redundancy, it will not be elaborated in detail here.

[0074] Corresponding to the above embodiments, this application also proposes a computer-readable storage medium.

[0075] The computer-readable storage medium of this application stores a control program for a range extender, which, when executed by a processor, implements the aforementioned control method for the range extender.

[0076] It should be noted that the above explanation of the embodiments and beneficial effects of the control method for the range extender is also applicable to the computer-readable storage medium of the embodiments of the present invention. To avoid redundancy, it will not be elaborated in detail here.

[0077] Corresponding to the above embodiments, this application also proposes a vehicle.

[0078] See Figure 4 As shown, the vehicle 300 of this application includes a memory 310, a processor 320, and a range extender control program stored in the memory 310 and executable on the processor 320. When the processor executes the range extender control program, it implements the aforementioned range extender control method.

[0079] It should be noted that the above-described embodiments and explanations of the beneficial effects of the range extender control method are also applicable to vehicles in the embodiments of the present invention, and will not be elaborated in detail here to avoid redundancy.

[0080] It should be noted that the logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as a sequenced list of executable instructions for implementing logical functions, and can be embodied in any computer-readable medium for use by, or in conjunction with, an instruction execution system, apparatus, or device (such as a computer-based system, a processor-included system, or other system that can fetch and execute instructions from, an instruction execution system, apparatus, or device). For the purposes of this specification, "computer-readable medium" can be any means that can contain, store, communicate, propagate, or transmit programs for use by, or in conjunction with, an instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of computer-readable media include: an electrical connection having one or more wires (electronic device), a portable computer disk drive (magnetic device), random access memory (RAM), read-only memory (ROM), erasable and editable read-only memory (EPROM or flash memory), fiber optic devices, and portable optical disc read-only memory (CDROM). Alternatively, the computer-readable medium may be paper or other suitable media on which the program can be printed, since the program can be obtained electronically, for example, by optically scanning the paper or other medium, followed by editing, interpreting, or otherwise processing as necessary, and then stored in a computer memory.

[0081] It should be understood that various parts of the present invention can be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, multiple steps or methods can be implemented in software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, it can be implemented using any one or a combination of the following techniques known in the art: discrete logic circuits having logic gates for implementing logical functions on data signals, application-specific integrated circuits (ASICs) having suitable combinational logic gates, programmable gate arrays (PGAs), field-programmable gate arrays (FPGAs), etc.

[0082] In the description of this specification, references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0083] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0084] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0085] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A control method for a range extender, characterized in that, The method includes: The vehicle's driving mode, the range extender's required power, and the range extender's target optimal power are obtained. The power generation capacity of the range extender is determined based on the vehicle's driving mode, the range extender's required power, and the target optimal power. The target speed and target generating torque of the range extender are determined based on the generating power of the range extender, and the range extender is controlled based on the target speed and the target generating torque; The power generation capacity of the range extender is determined based on the vehicle's driving mode, the range extender's power requirement, and the target optimal power, including: When the driving mode of the vehicle is Sport mode, if the power demand of the range extender is less than or equal to the difference between the target optimal power and the preset offset power, then the difference between the target optimal power and the preset offset power is taken as the power generation of the range extender. If the required power of the range extender is greater than the difference between the target optimal power and the preset offset power, then the required power of the range extender is taken as the power generation power of the range extender.

2. The control method for the range extender according to claim 1, characterized in that, The power generation capacity of the range extender is determined based on the vehicle's driving mode, the range extender's power requirement, and the target optimal power, including: When the vehicle's driving mode is Comfort mode, if the range extender's required power is less than or equal to the difference between the target optimal power and the preset offset power, or if the range extender's required power is greater than the difference between the target optimal power and the preset offset power and less than or equal to the sum of the target optimal power and the preset offset power, or if the range extender's required power is greater than the sum of the target optimal power and the preset offset power, then the range extender's required power is taken as the range extender's power generation capacity.

3. The control method for the range extender according to claim 1, characterized in that, The power generation capacity of the range extender is determined based on the vehicle's driving mode, the range extender's power requirement, and the target optimal power, including: When the vehicle is in economy mode, if the power demand of the range extender is less than or equal to the sum of the target optimal power and the preset offset power, then the power demand of the range extender is taken as the power generation power of the range extender. If the required power of the range extender is greater than the sum of the target optimal power and the preset offset power, then the sum of the target optimal power and the preset offset power shall be used as the power generation of the range extender.

4. The control method for the range extender according to claim 1 or 3, characterized in that, Determining the target speed of the range extender based on its power generation includes: The target speed of the range extender is determined based on the power output of the range extender and a first preset table, wherein the first preset table is used to characterize the correspondence between the power output of the range extender and the speed of the range extender.

5. The control method for the range extender according to claim 2, characterized in that, Determining the target speed of the range extender based on its power generation includes: If the required power of the range extender is less than or equal to the difference between the target optimal power and the preset offset power, or if the required power of the range extender is greater than the sum of the target optimal power and the preset offset power, the target speed of the range extender is determined according to the power generation of the range extender and a first preset table, wherein the first preset table is used to characterize the correspondence between the power generation of the range extender and the speed of the range extender; When the required power of the range extender is greater than the difference between the target optimal power and the preset offset power, but less than or equal to the sum of the target optimal power and the preset offset power, the target speed of the range extender is determined according to the power generation of the range extender and a second preset table, wherein the second preset table is used to characterize the correspondence between the optimal NVH at the power generation of the range extender and the speed of the range extender.

6. The control method for the range extender according to claim 1, characterized in that, Determining the target generating torque of the range extender based on its generating power includes: The target generating torque is determined based on the generating power of the range extender and the target rotational speed of the range extender.

7. A control device for a range extender, characterized in that, The device includes: The acquisition module is used to acquire the vehicle's driving mode, the range extender's required power, and the range extender's target optimal power. The first determining module is used to determine the power generation capacity of the range extender based on the driving mode of the vehicle, the power demand of the range extender, and the target optimal power. The second determining module is used to determine the target speed and target generating torque of the range extender based on the power generation of the range extender. A control module is used to control the range extender according to the target rotational speed and the target generating torque; The first determining module is specifically used to, when the vehicle's driving mode is Sport mode, if the range extender's required power is less than or equal to the difference between the target optimal power and the preset offset power, then the difference between the target optimal power and the preset offset power is used as the range extender's power generation; if the range extender's required power is greater than the difference between the target optimal power and the preset offset power, then the range extender's required power is used as the range extender's power generation.

8. A computer-readable storage medium, characterized in that, It stores a control program for the range extender, which, when executed by a processor, implements the control method for the range extender according to any one of claims 1-6.

9. A vehicle, characterized in that, The system includes a memory, a processor, and a control program for the range extender stored in the memory and executable on the processor. When the processor executes the control program for the range extender, it implements the control method for the range extender according to any one of claims 1-6.

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