A method, apparatus, vehicle, and storage medium for adjusting vehicle gear positions.

Abstract

This application relates to the field of vehicle control technology, specifically to a vehicle gear adjustment method, device, vehicle, and storage medium. The embodiments of this application first collect the vehicle's ambient temperature and transmission oil temperature, select the coupling efficiency diagrams for each gear that simultaneously match these two temperatures, then match the initial coupling efficiency corresponding to the vehicle's required power from each gear coupling efficiency diagram, and finally adjust the vehicle gear according to the gear corresponding to the coupling efficiency diagram where the initial selection efficiency is located. From the above, this application can compensate for vehicle efficiency losses due to temperature changes by adjusting the vehicle gears without shutting down the vehicle's high-voltage components, thereby improving vehicle efficiency while ensuring the normal operation of the vehicle.

Description

Technical Field

[0001] This application relates to the field of vehicle control technology, specifically to a vehicle gear adjustment method, device, vehicle, and storage medium. Background Technology

[0002] Improving vehicle efficiency reduces energy consumption (the energy used to drive the vehicle), thereby increasing its driving range. In other words, increasing vehicle efficiency increases driving range. However, vehicle efficiency decreases as the surface temperature of the vehicle's power supply system decreases. Current technology uses the shutdown of high-voltage components (high-energy-consuming components) to mitigate the efficiency loss due to temperature changes and maintain driving range. However, shutting down high-voltage components can affect the user's ability to use the vehicle normally.

[0003] In summary, while existing technologies improve vehicle efficiency, they reduce the functionality of the vehicle.

[0004] Therefore, existing technologies still need to be improved and enhanced. Summary of the Invention

[0005] This application provides a vehicle gear adjustment method, device, vehicle, and storage medium to solve the technical problem that the prior art reduces the vehicle's usability while improving vehicle efficiency.

[0006] To achieve the above objectives, this application adopts the following technical solution:

[0007] The first aspect of this application provides a method for adjusting vehicle gears, including the following steps:

[0008] Determine the power required for the vehicle's wheels;

[0009] Based on the ambient temperature of the vehicle and the transmission oil temperature of the vehicle, each coupling efficiency diagram corresponding to each gear of the vehicle is determined. Each coupling efficiency diagram is used to record the correspondence between wheel power and coupling efficiency. The coupling efficiency is used to characterize the overall efficiency of the vehicle.

[0010] From all the coupling efficiencies on each of the coupling efficiency diagrams, select the target coupling efficiency corresponding to the power required by the wheel;

[0011] The vehicle gear is adjusted based on the target coupling efficiency and the gear corresponding to each of the coupling efficiency diagrams.

[0012] Based on the aforementioned technical means, this application embodiment first collects the vehicle ambient temperature and transmission oil temperature, selects the coupling efficiency diagrams for each gear that simultaneously match these two temperatures, then matches the initial coupling efficiency corresponding to the vehicle's required power from each gear coupling efficiency diagram, and finally adjusts the vehicle gears according to the gear corresponding to the coupling efficiency diagram where the initial selected efficiency is located. From the above analysis, this application can compensate for the vehicle efficiency loss due to temperature changes by adjusting the vehicle gears without shutting down the vehicle's high-voltage components, thereby improving vehicle efficiency while ensuring the normal operation of the vehicle.

[0013] Furthermore, this application allows for the selection of the maximum efficiency that satisfies the vehicle's power from the efficiencies on various coupling efficiency diagrams. When the vehicle needs to operate at the aforementioned power, the vehicle's gear is adjusted to the gear corresponding to the coupling efficiency diagram where the maximum efficiency is located, ensuring that the vehicle's efficiency reaches its maximum. This allows the vehicle to operate under maximum efficiency conditions, thereby increasing the vehicle's driving range.

[0014] Optionally, in one embodiment of this application, determining the power required for the vehicle's wheels includes:

[0015] Determine the vehicle road load factor that matches the vehicle's ambient temperature;

[0016] The vehicle's speed, acceleration, mass, and road inclination are collected.

[0017] The power required for the vehicle's wheels is determined based on the vehicle's road load coefficient, speed, acceleration, mass, and road inclination.

[0018] Based on the above technical means, the embodiments of this application consider the ambient temperature factor when calculating the power required by the wheels, so that the calculated power required by the wheels is more consistent with the actual power at the ambient temperature, that is, the calculated power required by the vehicle is more accurate, thereby making the vehicle efficiency selected based on the vehicle power more accurate, and thus making the gear selected based on the vehicle efficiency more able to make the vehicle operate under high efficiency conditions.

[0019] Optionally, in one embodiment of this application, determining the vehicle road load factor matching the vehicle ambient temperature includes:

[0020] The vehicle ambient temperature is compared with a preset temperature threshold.

[0021] When the vehicle ambient temperature is lower than the temperature threshold, a resistance curve corresponding to the vehicle ambient temperature is determined. The resistance curve is used to record the correspondence between the vehicle ambient temperature and the road load coefficient.

[0022] Based on the resistance curve, determine the vehicle road load coefficient that matches the vehicle's ambient temperature.

[0023] According to the above technical means, when the vehicle ambient temperature is lower than the temperature threshold, it indicates that the vehicle is in low-temperature mode. That is, the vehicle road load factor in this application embodiment is the road load factor under low-temperature mode conditions. In other words, using the vehicle road load factor of this application, the power required by the wheels in low-temperature mode can be calculated, thereby determining the gear corresponding to the highest efficiency of the vehicle that matches the power required by the wheels under low-temperature mode conditions. This means that the gear selected in this application allows the vehicle to achieve maximum efficiency even when operating in low-temperature mode.

[0024] Optionally, in one embodiment of this application, the step of determining each coupling efficiency map corresponding to each gear of the vehicle based on the ambient temperature of the vehicle and the transmission oil temperature of the vehicle, wherein each coupling efficiency map is used to record the correspondence between wheel power and coupling efficiency, and the coupling efficiency is used to characterize the overall efficiency of the vehicle, including:

[0025] The vehicle ambient temperature is compared with a preset temperature, and the transmission oil temperature is compared with an oil temperature threshold.

[0026] When the vehicle ambient temperature is lower than a preset temperature and the transmission oil temperature is lower than an oil temperature threshold, the coupling efficiency diagrams corresponding to each gear are determined.

[0027] Based on the above technical means, the coupling efficiency diagram of this application embodiment is the coupling efficiency diagram corresponding to each gear in low temperature mode (i.e., the vehicle ambient temperature is less than the preset temperature and the transmission oil temperature is less than the oil temperature threshold), so as to allow this application to filter out the gears that can improve vehicle efficiency in low temperature mode.

[0028] Optionally, in one embodiment of this application, the step of selecting the target coupling efficiency corresponding to the power required by the wheel from all the coupling efficiencies on each of the coupling efficiency maps includes:

[0029] Determine the wheel power equipotential line and the coupling efficiency equipotential line on each of the coupling efficiency diagrams, wherein the wheel power on each wheel power equipotential line is the same, and the coupling efficiency on each coupling efficiency equipotential line is the same.

[0030] From all the wheel power equipotential lines on each of the coupling efficiency diagrams, select the wheel power equipotential line corresponding to the power required by the wheel, and record it as the initial power equipotential line;

[0031] Based on the distance between the initial power equipotential line and all coupling efficiency equipotential lines on the same coupling efficiency map, the initial efficiency equipotential line is selected from all coupling efficiency equipotential lines on the same coupling efficiency map;

[0032] From the coupling efficiencies corresponding to the initial efficiency equipotential lines on each of the coupling efficiency diagrams, the maximum coupling efficiency is selected and taken as the target coupling efficiency corresponding to the power required by the wheel.

[0033] Based on the above technical means, the embodiments of this application use two intuitive lines, the wheel power equipotential line and the coupling efficiency equipotential line, to make it easier and more intuitive to select the coupling efficiency that matches the power required by the vehicle.

[0034] Optionally, in one embodiment of this application, the step of selecting the initial efficiency equipotential line from all coupling efficiency equipotential lines on the same coupling efficiency map based on the distance between the initial power equipotential line and all coupling efficiency equipotential lines on the same coupling efficiency map includes:

[0035] From all the coupling efficiency equipotential lines on the same coupling efficiency map, select the coupling efficiency equipotential line that has the minimum distance from the initial power equipotential line, and denot it as the initial efficiency equipotential line.

[0036] Based on the above technical means, the embodiments of this application use the minimum distance between two equipotential lines to screen out the efficiency that best matches the power, thereby improving the accuracy of the efficiency screening.

[0037] Optionally, in one embodiment of this application, adjusting the vehicle gear according to the target coupling efficiency and the gear corresponding to each of the coupling efficiency maps includes:

[0038] Select the target coupling efficiency map containing the target coupling efficiency from each of the coupling efficiency maps;

[0039] Adjust the vehicle gear according to the gear corresponding to the target coupling efficiency diagram.

[0040] Based on the above technical means, the adjusted vehicle gears in this application embodiment can both ensure that the power of the wheels reaches the power required for vehicle operation and allow the vehicle to operate under the condition of maximum efficiency. In other words, the vehicle of this application meets the power required by the wheels under the condition of maximum efficiency, thereby reducing the energy consumption of the vehicle.

[0041] A second aspect of this application provides a vehicle gear shifting device, comprising:

[0042] The power calculation module is used to determine the power required by the vehicle's wheels;

[0043] The efficiency diagram generation module is used to determine each coupling efficiency diagram corresponding to each gear of the vehicle based on the ambient temperature of the vehicle and the transmission oil temperature of the vehicle. Each coupling efficiency diagram is used to record the correspondence between wheel power and coupling efficiency, and the coupling efficiency is used to characterize the overall efficiency of the vehicle.

[0044] An efficiency screening module is used to screen out the target coupling efficiency corresponding to the power required by the wheel from all the coupling efficiencies on each of the coupling efficiency diagrams.

[0045] The gear adjustment module is used to adjust the vehicle gear according to the target coupling efficiency and the gear corresponding to each of the coupling efficiency diagrams.

[0046] A third aspect of this application provides a vehicle, the vehicle including a memory, a processor, and a vehicle gear adjustment program stored in the memory and executable on the processor, wherein when the processor executes the vehicle gear adjustment program, it implements the steps of the vehicle gear adjustment method described above.

[0047] A fourth aspect of this application provides a computer-readable storage medium storing a vehicle gear shifting program, which, when executed by a processor, implements the steps of the vehicle gear shifting method described above.

[0048] The beneficial effects of this application are:

[0049] This application first collects the vehicle's ambient temperature and transmission oil temperature, selects the coupling efficiency diagrams for each gear that simultaneously match these two temperatures, then matches the initial coupling efficiency corresponding to the vehicle's required power from each gear coupling efficiency diagram, and finally adjusts the vehicle's gears according to the gear corresponding to the coupling efficiency diagram where the initial selected efficiency is located. From the above analysis, this application can compensate for vehicle efficiency losses due to temperature changes by adjusting the vehicle's gears without shutting down the vehicle's high-voltage components, thereby improving vehicle efficiency while ensuring the vehicle's normal operating functions.

[0050] This application allows for the selection of the maximum efficiency that satisfies the vehicle's power from various coupling efficiency diagrams. When the vehicle needs to operate at the aforementioned power, the vehicle's gear is adjusted to the gear corresponding to the coupling efficiency diagram where the maximum efficiency is located, ensuring that the vehicle's efficiency reaches its maximum. This allows the vehicle to operate under maximum efficiency conditions, thereby increasing the vehicle's driving range.

[0051] The vehicle road load factor in this application embodiment is the road load factor under low-temperature mode conditions. That is, using the vehicle road load factor of this application, the power required by the wheels in low-temperature mode can be calculated, thereby determining the gear corresponding to the highest vehicle efficiency that matches the power required by the wheels in low-temperature mode conditions. In other words, this allows the gear selected in this application to achieve maximum vehicle efficiency even when operating in low-temperature mode conditions.

[0052] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be expressed in part through the description itself.

[0053] This application has been put into practice. Attached Figure Description

[0054] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the following description of the embodiments taken in conjunction with the accompanying drawings, wherein:

[0055] Figure 1 This is the overall flowchart of this application;

[0056] Figure 2 This is a schematic diagram illustrating the coupling efficiency in an embodiment of this application;

[0057] Figure 3 This is a flowchart illustrating the low-temperature resistance curve determination process in the embodiments of this application.

[0058] Figure 4 This is a schematic diagram illustrating the determination of the low-temperature operation mode in an embodiment of this application;

[0059] Figure 5 This is a flowchart illustrating the low-temperature operation mode determination process in this application embodiment;

[0060] Figure 6 This is a schematic diagram of the vehicle gear adjustment device according to an embodiment of this application;

[0061] Figure 7 This is a block diagram illustrating the internal structure of a vehicle as provided in an embodiment of this application. Detailed Implementation

[0062] The embodiments of this application are described in detail below. Examples of these embodiments are shown 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 this application, and should not be construed as limiting this application.

[0063] The following description, with reference to the accompanying drawings, outlines a vehicle gear adjustment method, apparatus, vehicle, and storage medium according to embodiments of this application. Addressing the technical problem mentioned in the background art of improving vehicle efficiency while reducing vehicle usability, this application provides a vehicle gear adjustment method. In this method, firstly, the power required by the vehicle's wheels is determined; then, based on the vehicle's ambient temperature and transmission oil temperature, each coupling efficiency diagram corresponding to each gear is determined (each coupling efficiency diagram for each gear records the correspondence between wheel power and coupling efficiency, with coupling efficiency characterizing the overall efficiency of the vehicle); subsequently, from all coupling efficiencies on each coupling efficiency diagram, several preliminary coupling efficiencies corresponding to the power required by the wheels are selected; finally, based on these preliminary coupling efficiencies and the gears corresponding to each coupling efficiency diagram, the vehicle gears are adjusted. This application improves vehicle efficiency by adjusting the vehicle gears.

[0064] For example, suppose a vehicle has five gears: first, second, third, fourth, and fifth. In low-temperature operating mode, these five gears correspond to five different coupling efficiency diagrams: first gear corresponds to coupling efficiency diagram I, second gear to coupling efficiency diagram II, third gear to coupling efficiency diagram III, fourth gear to coupling efficiency diagram IV, and fifth gear to coupling efficiency diagram V. Each coupling efficiency diagram records the relationship between the power required by the wheels and the coupling efficiency. Figure 2 As shown, if Figure 2 Figure III shows the coupling efficiency of the three gears in low-temperature operation mode. Figure 2 The solid line represents coupling efficiency, and the dashed line represents wheel power. If the wheel requires 37 power, the dashed line representing 37 power intersects the solid line representing 86 efficiency. This means the efficiency corresponding to the wheel's required power of 37 is 86. However, the efficiency corresponding to the wheel's required power of 37 in the coupling efficiency diagram V may not be 86. The coupling efficiency diagrams for the same gear also differ between normal temperature operation and low temperature operation modes. For example, the coupling efficiency diagram for third gear in normal temperature operation mode... So, in the coupling efficiency diagram The efficiency corresponding to the power required by the wheel (37) may not be 86 but 96.

[0065] When the vehicle is determined to be in low-temperature operation mode based on the ambient temperature and transmission oil temperature, and the power required by the wheels is calculated to be 37, if the efficiency corresponding to 37 in coupling efficiency diagram I is 80, in coupling efficiency diagram II it is 82, in coupling efficiency diagram III it is 86, in coupling efficiency diagram IV it is 88, and in coupling efficiency diagram V it is 81, since efficiency 88 is the maximum efficiency, the fourth gear corresponding to coupling efficiency diagram IV is taken as the gear that best matches the power of 37. In other words, adjusting the vehicle to fourth gear will maximize the vehicle's efficiency.

[0066] Specifically, Figure 1 This is a schematic flowchart of a vehicle gear adjustment method provided in an embodiment of this application.

[0067] like Figure 1 As shown, the vehicle gear adjustment method includes the following steps:

[0068] S100 determines the power required for the vehicle's wheels.

[0069] S200, based on the ambient temperature of the vehicle and the transmission oil temperature of the vehicle, determine each coupling efficiency diagram corresponding to each gear of the vehicle. Each coupling efficiency diagram is used to record the correspondence between wheel power and coupling efficiency, and the coupling efficiency is used to characterize the overall efficiency of the vehicle.

[0070] S300, from all the coupling efficiencies on each of the coupling efficiency diagrams, select the target coupling efficiency corresponding to the power required by the wheel.

[0071] S400, adjust the vehicle gear according to the target coupling efficiency and the gear corresponding to each of the coupling efficiency diagrams.

[0072] In one embodiment, when the vehicle ambient temperature is greater than a preset temperature and the transmission oil temperature is greater than an oil temperature threshold, the vehicle is in high-temperature mode. The normal temperature coupling efficiency map corresponding to each gear in high-temperature mode is collected, the maximum efficiency that matches the power required by the vehicle is selected from the normal temperature coupling efficiency map, the gear corresponding to the coupling efficiency map where the maximum efficiency is located is taken as the target gear, and the vehicle gear is adjusted to the target gear.

[0073] In one embodiment, the power required by the wheel in step S100 is the power required for the wheel to maintain normal driving on a specific road at a certain speed and acceleration. The vehicle is a P2 configuration new energy pure electric vehicle. In this embodiment, step S100 includes the following specific steps S101, S102, and S103:

[0074] S101, determine the vehicle road load factor that matches the vehicle ambient temperature.

[0075] like Figure 3 As shown, the road load coefficient of the same vehicle on the same road varies depending on the ambient temperature.

[0076] When the ambient temperature is lower than the temperature threshold c, it is determined that the environment in which the vehicle is located belongs to the low-temperature mode environment, and the low-temperature resistance curve corresponding to the low-temperature mode environment is determined. The low-temperature resistance curve is used to record the correspondence between the vehicle ambient temperature and the road load coefficient in the low-temperature mode environment. Based on the resistance curve, the vehicle road load coefficient that matches the vehicle ambient temperature is determined.

[0077] In other words, when the ambient temperature is greater than or equal to the temperature threshold c, the room temperature resistance curve is used. (or called) Obtain the vehicle road load factor at the current ambient temperature. , , ( , , These are the road load factors for the first vehicle, the second vehicle, and the third vehicle, respectively, with units of N, N / km / h, and N / (km / h). 2 When the ambient temperature is below the temperature threshold c, the low-temperature resistance curve is used. Obtain the vehicle road load factor at the current ambient temperature. The correspondence between ambient temperature and road load factor recorded in the normal temperature drag curve differs from that recorded in the low temperature drag curve.

[0078] S102, collect the vehicle's speed, the vehicle's acceleration, the vehicle's mass, and the road inclination where the vehicle is located.

[0079] S103, based on the vehicle road load coefficient , , The speed of the vehicle (Unit: km / h) Acceleration of the vehicle (unit m / s) 2 The vehicle's mass TM (in kg) and the road inclination where the vehicle is located. Determine the power required for the vehicle's wheels. .

[0080] ,

[0081] In the formula, This represents the power required by the wheels of the vehicle from time i-1 to time i (that is, the power required at the wheel ends). Let G be the target speed of the vehicle at time i, and G be the total weight of the vehicle. Let be the acceleration of the vehicle from time i-1 to time i.

[0082] In one embodiment, step S200 includes the following specific steps S201 and S202:

[0083] S201, compare the vehicle ambient temperature with a preset temperature, and compare the transmission oil temperature with an oil temperature threshold.

[0084] That is, to determine whether the ambient temperature of the vehicle is lower than a preset temperature a, and to determine whether the transmission oil temperature is lower than the oil temperature threshold b.

[0085] S202, when the vehicle ambient temperature is lower than a preset temperature and the transmission oil temperature is lower than an oil temperature threshold, determine the coupling efficiency diagrams corresponding to each gear.

[0086] For example, such as Figure 4 and Figure 5 As shown, when the ambient temperature is lower than the preset temperature a and the transmission oil temperature is lower than the oil temperature threshold b, the vehicle is determined to be in low temperature operation mode; otherwise, the vehicle is in normal temperature operation mode.

[0087] Figure 2 This is a graph showing the low-temperature coupling efficiency of a certain gear when the vehicle is operating in low-temperature mode. Figure 2 The solid line represents coupling efficiency, and the dashed line represents wheel power. The coupling efficiency and wheel power at the intersection of the solid and dashed lines are a corresponding pair. The low-temperature coupling efficiency diagrams for different gears in low-temperature mode are shown, and the low-temperature coupling efficiency diagram for the same gear in low-temperature mode also differs from the non-low-temperature coupling efficiency diagram in non-low-temperature mode. Coupling efficiency refers to the overall efficiency achieved by the coupling between the motor and the transmission.

[0088] Based on the embodiment of step S200, step S300 includes the following specific steps S301 to S304:

[0089] S301, determine the wheel power equipotential line and the coupling efficiency equipotential line on each of the coupling efficiency diagrams, wherein the wheel power on each wheel power equipotential line is the same, and the coupling efficiency on each coupling efficiency equipotential line is the same.

[0090] like Figure 2 As shown, the solid line represents the coupling efficiency equipotential line, and the dashed line represents the wheel power equipotential line.

[0091] S302, from all the wheel power equipotential lines on each of the coupling efficiency diagrams, select the wheel power equipotential line corresponding to the power required by the wheel, and record it as the initial power equipotential line.

[0092] If the power required by the wheel calculated in step S100 is 37, then Figure 2 The dashed line where 37 is located is the initial power equipotential line. Figure 2 This is just a low-temperature coupling efficiency diagram corresponding to one gear. If the vehicle has 5 gears, there will be 5 low-temperature coupling efficiency diagrams. From these 5 low-temperature coupling efficiency diagrams, the initial power equipotential line where 37 is located is selected, resulting in a total of 5 initial power equipotential lines.

[0093] S303, from all the coupling efficiency equipotential lines on the same coupling efficiency map, select the coupling efficiency equipotential line that has the minimum distance from the initial power equipotential line, and denot it as the initial efficiency equipotential line.

[0094] for example Figure 2 The initial power equipotential line where power 37 is located is close to the coupling efficiency equipotential line of efficiency 87 and intersects with the coupling efficiency equipotential line of efficiency 86. Therefore, the initial efficiency equipotential line corresponding to power 37 is the coupling efficiency equipotential line where efficiency 86 is located.

[0095] S304, from the coupling efficiencies corresponding to the initial efficiency equipotential lines on each of the coupling efficiency diagrams, select the maximum coupling efficiency and use the maximum coupling efficiency as the target coupling efficiency corresponding to the power required by the wheel.

[0096] Continuing with the example above, if each gear corresponds to a coupling efficiency diagram (such as a low-temperature coupling efficiency diagram), then power 37 corresponds to at least 5 initial coupling efficiencies in the five low-temperature coupling efficiency diagrams.

[0097] In one embodiment, step S400 includes the following specific steps S401 and S402:

[0098] S401, select the target coupling efficiency map containing the target coupling efficiency from each of the coupling efficiency maps.

[0099] S402, adjust the vehicle gear according to the gear corresponding to the target coupling efficiency diagram.

[0100] Continuing with the example above, the maximum coupling efficiency is selected from the five initial coupling efficiencies. If the maximum coupling efficiency appears in the coupling efficiency diagram corresponding to the third gear, then the vehicle's gear can be adjusted to the third gear so that the vehicle's gear matches the power required by the wheels in step S100.

[0101] The purpose of adjusting the gear in steps S100, S200, S300, and S400 is to enable the intelligent driving vehicle to automatically adjust its gear to match the speed in step S102. acceleration Matching gears to ensure the transmission and motor operate in their optimal range, that is, when the speed... acceleration When there is a corresponding relationship between the gear and the three (as shown in Table 1), the transmission and motor can operate in the optimal range to save electricity in pure electric vehicles.

[0102] Table 1

[0103]

[0104] Next, the vehicle gear adjustment device according to an embodiment of this application is described with reference to the accompanying drawings.

[0105] like Figure 6 As shown, the vehicle gear adjustment device 10 includes: a power calculation module 100, an efficiency map generation module 200, an efficiency screening module 300, and a gear adjustment module 400.

[0106] Specifically, the power calculation module 100 is used to determine the power required by the vehicle's wheels.

[0107] The efficiency diagram generation module 200 is used to determine each coupling efficiency diagram corresponding to each gear of the vehicle based on the ambient temperature of the vehicle and the transmission oil temperature of the vehicle. Each coupling efficiency diagram is used to record the correspondence between wheel power and coupling efficiency, and the coupling efficiency is used to characterize the overall efficiency of the vehicle.

[0108] The efficiency screening module 300 is used to screen out the target coupling efficiency corresponding to the power required by the wheel from all the coupling efficiencies on each of the coupling efficiency diagrams.

[0109] The gear adjustment module 400 is used to adjust the vehicle gear according to the target coupling efficiency and the gear corresponding to each of the coupling efficiency diagrams.

[0110] It should be noted that the foregoing explanation of the vehicle gear adjustment method embodiment also applies to the vehicle gear adjustment device of this embodiment, and will not be repeated here.

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

[0112] The memory 501, the processor 502, and the computer program stored on the memory 501 and capable of running on the processor 502.

[0113] When processor 502 executes the program, it implements the vehicle gear adjustment method provided in the above embodiments.

[0114] Furthermore, the vehicle also includes:

[0115] Communication interface 503 is used for communication between memory 501 and processor 502.

[0116] The memory 501 is used to store computer programs that can run on the processor 502.

[0117] The memory 50 1 may include high-speed RAM memory, and may also include non-volatile memory, such as at least one disk storage device.

[0118] If the memory 501, processor 502, and communication interface 503 are implemented independently, then the communication interface 503, memory 501, and processor 502 can be interconnected via a bus to complete communication between them. The bus can be an Industry Standard Architecture (ISA) bus, a Peripheral Component Interconnect (PCI) bus, or an Extended Industry Standard Architecture (EISA) bus, etc. Buses can be categorized as address buses, data buses, control buses, etc. For ease of representation, Figure 7 The bus is represented by a single thick line, but this does not mean that there is only one bus or one type of bus.

[0119] Optionally, in a specific implementation, if the memory 501, processor 502, and communication interface 503 are integrated on a single chip, then the memory 501, processor 502, and communication interface 503 can communicate with each other through an internal interface.

[0120] Processor 502 may be a central processing unit (CPU), an application specific integrated circuit (ASIC), or one or more integrated circuits configured to implement the embodiments of this application.

[0121] This embodiment also provides a computer-readable storage medium storing a computer program that, when executed by a processor, implements the vehicle gear adjustment method described above.

[0122] In the description of this specification, the 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 this application. 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. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0123] 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 application, "N" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0124] Any process or method description in the flowchart or otherwise herein can be understood as representing a module, segment, or portion of code comprising one or N executable instructions for implementing custom logic functions or processes, and the scope of the preferred embodiments of this application includes additional implementations in which functions may be performed not in the order shown or discussed, including substantially simultaneously or in reverse order depending on the functions involved, as should be understood by those skilled in the art to which embodiments of this application pertain.

[0125] The logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as a ordered 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 read and execute instructions from or in conjunction with such 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). In addition, computer-readable media can even be paper or other suitable media on which programs can be printed, because programs can be obtained electronically by optically scanning paper or other media, then editing, interpreting or otherwise processing them as necessary, and then storing them in computer memory.

[0126] It should be understood that the various parts of this application can be implemented using hardware, software, firmware, or a combination thereof. In the above embodiments, the N steps or methods can be implemented using software or firmware stored in memory and executed by a suitable instruction execution system. 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.

[0127] Those skilled in the art will understand that all or part of the steps of the methods described in the above embodiments can be implemented by a program instructing related hardware, and the program can be stored in a computer-readable storage medium. When executed, the program includes one or a combination of the steps of the method embodiments.

[0128] Furthermore, the functional units in the various embodiments of this application can be integrated into a processing module, or each unit can exist physically separately, or two or more units can be integrated into a module. The integrated module can be implemented in hardware or as a software functional module. If the integrated module is implemented as a software functional module and sold or used as an independent product, it can also be stored in a computer-readable storage medium.

[0129] The storage medium mentioned above can be a read-only memory, a disk, or an optical disk, etc. Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of this application.

Claims

1. A method for adjusting vehicle gears, characterized in that, Includes the following steps: Determine the power required for the vehicle's wheels; The coupling efficiency diagrams corresponding to the same gear are different in normal temperature operation mode and low temperature operation mode. Based on the ambient temperature of the vehicle and the transmission oil temperature of the vehicle, the coupling efficiency diagrams corresponding to each gear of the vehicle are determined. Each coupling efficiency diagram is used to record the correspondence between wheel power and coupling efficiency. The coupling efficiency is used to characterize the overall efficiency of the vehicle. From all the coupling efficiencies on each of the coupling efficiency diagrams, the target coupling efficiency corresponding to the power required by the wheel is selected, and the maximum coupling efficiency is taken as the target coupling efficiency corresponding to the power required by the wheel. The vehicle gear is adjusted based on the target coupling efficiency and the gear corresponding to each of the coupling efficiency diagrams.

2. The vehicle gear adjustment method as described in claim 1, characterized in that, Determining the power required for the vehicle's wheels includes: Determine the vehicle road load factor that matches the vehicle's ambient temperature; The vehicle's speed, acceleration, mass, and road inclination are collected. The power required for the vehicle's wheels is determined based on the vehicle's road load coefficient, speed, acceleration, mass, and road inclination.

3. The vehicle gear adjustment method as described in claim 2, characterized in that, The determination of the vehicle road load factor matching the vehicle ambient temperature includes: The vehicle ambient temperature is compared with a preset temperature threshold. When the vehicle ambient temperature is lower than the temperature threshold, a resistance curve corresponding to the vehicle ambient temperature is determined. The resistance curve is used to record the correspondence between the vehicle ambient temperature and the road load coefficient. Based on the resistance curve, determine the vehicle road load coefficient that matches the vehicle's ambient temperature.

4. The vehicle gear adjustment method as described in claim 1, characterized in that, Based on the ambient temperature of the vehicle and the transmission oil temperature, a coupling efficiency map is determined for each gear position. Each coupling efficiency map records the relationship between wheel power and coupling efficiency. The coupling efficiency characterizes the overall efficiency of the vehicle, including: The vehicle ambient temperature is compared with a preset temperature, and the transmission oil temperature is compared with an oil temperature threshold. When the vehicle ambient temperature is lower than a preset temperature and the transmission oil temperature is lower than an oil temperature threshold, the coupling efficiency diagrams corresponding to each gear are determined.

5. The vehicle gear adjustment method as described in claim 1, characterized in that, The step of selecting the target coupling efficiency corresponding to the power required by the wheel from all the coupling efficiencies on each of the coupling efficiency maps includes: Determine the wheel power equipotential line and the coupling efficiency equipotential line on each of the coupling efficiency diagrams, wherein the wheel power on each wheel power equipotential line is the same, and the coupling efficiency on each coupling efficiency equipotential line is the same. From all the wheel power equipotential lines on each of the coupling efficiency diagrams, select the wheel power equipotential line corresponding to the power required by the wheel, and record it as the initial power equipotential line; Based on the distance between the initial power equipotential line and all coupling efficiency equipotential lines on the same coupling efficiency map, the initial efficiency equipotential line is selected from all coupling efficiency equipotential lines on the same coupling efficiency map; The maximum coupling efficiency is selected from the coupling efficiencies corresponding to the initial efficiency equipotential lines on the various coupling efficiency maps.

6. The vehicle gear adjustment method as described in claim 5, characterized in that, The step of selecting preliminary efficiency equipotential lines from all coupling efficiency equipotential lines on the same coupling efficiency map based on the distance between the preliminary power equipotential line and all coupling efficiency equipotential lines on the same coupling efficiency map includes: From all the coupling efficiency equipotential lines on the same coupling efficiency map, select the coupling efficiency equipotential line with the smallest distance from the initial power equipotential line, and denot it as the initial efficiency equipotential line.

7. The vehicle gear adjustment method as described in claim 1, characterized in that, The step of adjusting the vehicle gear based on the target coupling efficiency and the gear corresponding to each of the coupling efficiency diagrams includes: Select the target coupling efficiency map containing the target coupling efficiency from each of the coupling efficiency maps; Adjust the vehicle gear according to the gear corresponding to the target coupling efficiency diagram.

8. A vehicle gear shifting device, characterized in that, include: The power calculation module is used to determine the power required by the vehicle's wheels; The efficiency diagram generation module is used to determine the coupling efficiency diagrams corresponding to each gear of the vehicle based on the ambient temperature of the vehicle and the transmission oil temperature of the vehicle. Each coupling efficiency diagram is used to record the correspondence between wheel power and coupling efficiency. The coupling efficiency is used to characterize the overall efficiency of the vehicle. The coupling efficiency diagrams corresponding to the same gear are different in normal temperature operation mode and low temperature operation mode. An efficiency filtering module is used to filter out the target coupling efficiency corresponding to the power required by the wheel from all the coupling efficiencies on each of the coupling efficiency diagrams, and take the maximum coupling efficiency as the target coupling efficiency corresponding to the power required by the wheel. The gear adjustment module is used to adjust the vehicle gear according to the target coupling efficiency and the gear corresponding to each of the coupling efficiency diagrams.

9. A vehicle, characterized in that, The vehicle includes a memory, a processor, and a vehicle gear adjustment program stored in the memory and executable on the processor. When the processor executes the vehicle gear adjustment program, it implements the steps of the vehicle gear adjustment method as described in any one of claims 1-7.

10. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a vehicle gear shifting program, which, when executed by a processor, implements the steps of the vehicle gear shifting method as described in any one of claims 1-7.

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