Gearbox gear control method, gearbox controller and readable storage medium

Abstract

The invention provides a gearbox gear control method, a gearbox controller and a readable storage medium, and the control method comprises the steps: obtaining real-time road condition information, and obtaining predicted operation condition information of an electric drive system according to the real-time road condition information; working condition energy loss information and gear shifting energy loss information of the electric drive system under different gearbox gears are obtained according to pre-obtained energy loss distribution information and predicted operation working condition information of the electric drive system under different gearbox gears; and according to the working condition energy loss information and the gear shifting energy loss information of the electric drive system under the different gearbox gears, the target gearbox gear is determined. According to the method, the energy consumption of the whole vehicle can be optimized, so that the endurance mileage is increased, the energy consumption is reduced, and the method is environment-friendly.

Description

Technical Field

[0001] The present invention relates to the field of vehicle control technology, and in particular to a transmission gear control method, a transmission controller and a readable storage medium. Background Art

[0002] At present, the mainstream solution of electric drive system is to integrate the motor controller, motor and single-speed reducer into a three-in-one design. The single-speed reducer is a fixed speed ratio reducer. The single-speed ratio used in the electric drive system is mostly between 8 and 14. However, because the fixed speed ratio reducer has only one gear, the electric drive system is often in the non-optimal efficiency area, resulting in a waste of electricity and reducing the driving range of electric vehicles. In addition, the requirements for the drive motor are increased. The drive motor equipped with only a single-speed reducer must provide a higher torque in the constant torque area and a higher operating speed in the constant power area to meet the overall performance requirements of the vehicle such as acceleration, climbing, and high-speed driving. Therefore, the use of two-speed gearboxes in electric vehicles has gradually entered the public's field of vision. The characteristics of the two-speed reducer can solve the above contradictions, and the automatic shifting device is combined with the two-speed gearbox to realize the automatic shifting.

[0003] Compared with the electric drive system with a single-speed reducer, the electric drive system equipped with a two-speed gearbox should pursue the optimal vehicle power and economy. Usually, when the accelerator pedal is opened to the maximum, the car has the strongest power, but it also increases the power consumption of the whole vehicle. When the accelerator is opened to the minimum, the power consumption of the whole vehicle can be reduced, but the power of the whole vehicle is insufficient at this time. At present, the control strategy for the electric drive system equipped with a two-speed gearbox is relatively simple. For example, it is driven by 1st gear in the whole vehicle sports mode and by 2nd gear in the whole vehicle economic mode. This strategy does not fully realize the reasonable allocation of the 1st and 2nd gear working points. The overall efficiency of the electric bridge system is not at the optimal working point, and there is a certain room for improvement in energy consumption. Therefore, in response to the above problems, a more intelligent control strategy needs to be developed.

[0004] It should be noted that the information disclosed in the background technology section of the invention is only intended to deepen the understanding of the general background technology of the invention, and should not be regarded as an admission or suggestion in any form that the information constitutes prior art already known to those skilled in the art. Summary of the invention

[0005] The object of the present invention is to provide a transmission gear control method, a transmission controller and a readable storage medium, which can optimize the energy consumption of the entire vehicle, thereby helping to increase the cruising range, reduce energy consumption, and be environmentally friendly.

[0006] To achieve the above object, the present invention provides a gearbox gear control method, wherein the gearbox has at least two gears, and the control method comprises:

[0007] Acquiring real-time traffic information, and acquiring predicted operating condition information of the electric drive system based on the real-time traffic information;

[0008] According to the pre-acquired energy loss distribution information of the electric drive system under different gearbox gears and the predicted operating condition information, the operating condition energy loss information and the gear shifting energy loss information of the electric drive system under different gearbox gears are acquired;

[0009] The target gearbox gear is determined according to the operating condition energy loss information of the electric drive system under different gearbox gears and the gear shifting energy loss information.

[0010] Optionally, the control method further includes:

[0011] Real-time vehicle status information is acquired, and an optimal gear shifting timing is determined based on the real-time vehicle status information and the predicted operating condition information.

[0012] Optionally, determining the optimal gear shifting timing according to the real-time vehicle state information and the predicted operating condition information includes:

[0013] The real-time vehicle status information and the predicted operating condition information are input into a pre-trained gear shift prediction model to determine whether the current time is the best time to shift gears.

[0014] Optionally, the vehicle status information includes vehicle speed information, acceleration information and accelerator pedal position information.

[0015] Optionally, determining the target gearbox gear according to the operating condition energy loss information and the gear shifting energy loss information of the electric drive system at different gearbox gears includes:

[0016] Determining energy loss information corresponding to the current gearbox gear according to the working condition energy loss information of the electric drive system under the current gearbox gear;

[0017] For each other gearbox gear position except the current gearbox gear position, determine the energy loss information corresponding to the other gearbox gear position according to the operating condition energy loss information of the electric drive system in the other gearbox gear position and the gear shift energy loss information when switching from the current gearbox gear position to the other gearbox gear position;

[0018] The target gearbox gear is determined according to the energy loss information corresponding to each gearbox gear.

[0019] Optionally, determining the target gearbox gear according to the energy loss information corresponding to each gearbox gear, and determining the target gearbox gear includes:

[0020] If there is at least one other gearbox gear position whose energy loss is smaller than the energy loss corresponding to the current gearbox gear position, and the absolute value of the difference between the two is larger than the preset gear shift threshold, then the other gearbox gear position with the smallest energy loss is used as the target gearbox gear position;

[0021] Otherwise, the current gearbox gear is used as the target gearbox gear.

[0022] Optionally, determining the target gearbox gear according to the energy loss information corresponding to each gearbox gear includes:

[0023] According to the energy loss information, power response information and driving comfort information corresponding to each gearbox gear, the gearbox gear that meets the preset multi-objective optimization conditions is used as the target gearbox gear.

[0024] Optionally, for each gearbox gear, the power response information corresponding to the gearbox gear is determined according to an external characteristic curve of the electric drive system at the gearbox gear.

[0025] Optionally, acquiring predicted operating condition information of the electric drive system according to the real-time road condition information includes:

[0026] Acquiring vehicle speed prediction information according to the real-time road condition information;

[0027] According to the vehicle speed prediction information, the predicted operating condition information of the electric drive system is obtained.

[0028] To achieve the above object, the present invention further provides a transmission controller, comprising a processor and a memory, wherein the memory stores a computer program, and when the computer program is executed by the processor, the transmission gear control method described above is implemented.

[0029] In order to achieve the above object, the present invention further provides a readable storage medium, in which a computer program is stored. When the computer program is executed by a processor, the transmission gear control method described above is implemented.

[0030] Compared with the prior art, the transmission gear control method, transmission controller and readable storage medium provided by the present invention have the following beneficial effects:

[0031] The gearbox gear control method provided by the present invention first obtains real-time road condition information, and obtains the predicted operating condition information of the electric drive system according to the real-time road condition information; then obtains the operating condition energy loss information and the shifting energy loss information of the electric drive system under different gearbox gears according to the energy loss distribution information of the electric drive system under different gearbox gears obtained in advance and the predicted operating condition information; finally, the target gearbox gear is determined according to the operating condition energy loss information and the shifting energy loss information of the electric drive system under different gearbox gears. It can be seen that the gearbox control method provided by the present invention can optimize the energy consumption of the whole vehicle, thereby helping to improve the cruising range, reduce energy consumption, and be environmentally friendly. In addition, the gearbox gear control method provided by the present invention can intelligently predict the operating condition of the vehicle (i.e. the operating condition of the electric drive system) and make gear planning in advance. According to the upcoming uphill, downhill or congested area, the gearbox gear with less loss can be selected for operation to ensure that the vehicle is in a suitable gearbox gear, thereby optimizing the performance and energy consumption of the whole vehicle, and then effectively improving the driving experience of the whole vehicle.

[0032] Since the transmission controller and the readable storage medium provided by the present invention belong to the same inventive concept as the transmission gear control method provided by the present invention, the transmission controller and the readable storage medium provided by the present invention at least have all the beneficial effects of the transmission gear control method provided by the present invention. For details, please refer to the relevant content above regarding the beneficial effects of the transmission gear control method provided by the present invention. Therefore, the beneficial effects of the transmission controller and the readable storage medium provided by the present invention will not be described one by one here. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 A schematic flow chart of a transmission gear position control method provided in one embodiment of the present invention;

[0034] Figure 2 A schematic diagram of a gearbox shifting principle provided by an embodiment of the present invention;

[0035] Figure 3 A schematic block diagram of a transmission controller according to an embodiment of the present invention. DETAILED DESCRIPTION

[0036] The following is a further detailed description of the transmission gear control method, transmission controller and readable storage medium proposed in the present invention in combination with the accompanying drawings and specific embodiments. According to the following description, the advantages and features of the present invention will be clearer. It should be noted that the drawings are in a very simplified form and use non-precise proportions, which are only used to conveniently and clearly assist in explaining the purpose provided by the present invention. In order to make the purposes, features and advantages of the present invention more obvious and easy to understand, please refer to the accompanying drawings. It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the present invention. Any structural modification, change in proportional relationship or adjustment of size, under the condition of being the same or similar to the effects that can be produced by the present invention and the purposes that can be achieved, should still fall within the scope of the technical content disclosed by the present invention.

[0037] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements. The singular forms "a", "an" and "the" include plural objects, the term "or" is generally used in a sense including "and / or", the term "several" is generally used in a sense including "at least one", and the term "at least two" is generally used in a sense including "two or more". In addition, the terms "first", "second" and "third" are used for descriptive purposes only and are not to be understood as indicating or suggesting relative importance or implicitly indicating the number of the indicated technical features.

[0038] In addition, in the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0039] The core idea of ​​the present invention is to provide a transmission gear control method, a transmission controller and a readable storage medium, which can optimize the energy consumption of the entire vehicle, thereby helping to improve the cruising range, reduce energy consumption, and be environmentally friendly.

[0040] It should be noted that the transmission gear position control method provided by the present invention can be applied to the transmission controller provided by the present invention, wherein the transmission controller can be a hardware device with various operating systems. The transmission gear position control method provided by the present invention can be applied to pure electric vehicles, including sports utility vehicles (SUVs), buses, trucks, and passenger vehicles including various commercial vehicles.

[0041] To realize the above idea, the present invention provides a gearbox gear control method, wherein the gearbox has at least two gears. Figure 1 , which is a flow chart of a transmission gear position control method provided by one embodiment of the present invention, such as Figure 1 As shown, the gearbox gear control method comprises the following steps:

[0042] Step S100: acquiring real-time traffic information, and acquiring predicted operating condition information of the electric drive system based on the real-time traffic information.

[0043] Step S200, obtaining the operating condition energy loss information and the gear shifting energy loss information of the electric drive system under different gear positions according to the pre-acquired energy loss distribution information of the electric drive system under different gear positions and the predicted operating condition information.

[0044] Step S300: determining a target gearbox gear according to the operating energy loss information of the electric drive system under different gearbox gears and the gear shifting energy loss information.

[0045] It can be seen that the transmission control method provided by the present invention can optimize the energy consumption of the whole vehicle, thereby helping to improve the cruising range, reduce energy consumption, and be environmentally friendly. In addition, the transmission gear control method provided by the present invention can intelligently predict the operating conditions of the vehicle (i.e., the operating conditions of the electric drive system) and make gear planning in advance. It can select a transmission gear with less loss for operation according to the upcoming uphill, downhill or congested area to ensure that the vehicle is in a suitable transmission gear, thereby optimizing the performance and energy consumption of the whole vehicle, and then effectively improving the driving experience of the whole vehicle.

[0046] Specifically, the energy loss distribution information of the electric drive system under different gearbox gears can be obtained by actual vehicle calibration. Further, for each gearbox gear, the energy loss (in W) under different voltages, different oil temperatures, and different working conditions can be calculated according to the pre-created vehicle energy consumption model to obtain the energy loss distribution information of the electric drive system under the gearbox gear. Further, based on the energy loss distribution information of the electric drive system under different gearbox gears, the additional energy loss generated when switching from the current gearbox gear to any other gearbox gear (any gearbox gear other than the current gearbox gear) under the predicted working condition (predicted operating condition), the current vehicle oil temperature, and the current vehicle working voltage can be evaluated, thereby obtaining the gear shift energy loss information. It should be noted that, as can be understood by those skilled in the art, for each gearbox gear, the working condition energy loss information of the electric drive system under the gearbox gear can be determined based on the current vehicle oil temperature, the current vehicle working voltage, and the predicted working condition (predicted operating condition), and combined with the energy loss distribution information of the electric drive system under the gearbox gear.

[0047] In some exemplary embodiments, acquiring predicted operating condition information of the electric drive system according to the real-time road condition information includes:

[0048] Acquiring vehicle speed prediction information according to the real-time road condition information;

[0049] According to the vehicle speed prediction information, the predicted operating condition information of the electric drive system is obtained.

[0050] Specifically, real-time traffic information (such as road types, traffic flow and weather information provided by satellite navigation systems, etc.) can be obtained through the Internet of Vehicles. The road conditions ahead can be predicted through real-time traffic information, so that the possible vehicle speed can be calculated (i.e., vehicle speed prediction information is obtained). Furthermore, the operating point of the electric drive system can be calculated based on the calculated vehicle speed in combination with the vehicle dynamics equation (i.e., the predicted operating condition information of the electric drive system is obtained).

[0051] In some exemplary embodiments, determining the target gearbox gear according to the operating condition energy loss information and the gear shifting energy loss information of the electric drive system at different gearbox gears includes:

[0052] Determining energy loss information corresponding to the current gearbox gear according to the working condition energy loss information of the electric drive system under the current gearbox gear;

[0053] For each other gearbox gear position except the current gearbox gear position, determine the energy loss information corresponding to the other gearbox gear position according to the operating condition energy loss information of the electric drive system in the other gearbox gear position and the gear shift energy loss information when switching from the current gearbox gear position to the other gearbox gear position;

[0054] The target gearbox gear is determined according to the energy loss information corresponding to each gearbox gear.

[0055] Specifically, for the current transmission gear, the corresponding energy loss is the operating condition energy loss under the gear; for any other transmission gear other than the current transmission gear, since additional energy loss will be generated when switching from the current transmission gear to the other transmission gear, the sum of the operating condition energy loss under the other transmission gear and the gear shifting energy loss when switching from the current transmission gear to the other transmission gear is taken as the energy loss corresponding to the other transmission gear.

[0056] In some exemplary embodiments, the target gearbox gear is determined according to the energy loss information corresponding to each gearbox gear, and the target gearbox gear is determined, including:

[0057] If there is at least one other gearbox gear position whose energy loss is smaller than the energy loss corresponding to the current gearbox gear position, and the absolute value of the difference between the two is larger than the preset gear shift threshold, then the other gearbox gear position with the smallest energy loss is used as the target gearbox gear position;

[0058] Otherwise, the current gearbox gear is used as the target gearbox gear.

[0059] Thus, the gear shifting operation is performed only when switching from the current gearbox gear to another gearbox gear can bring energy savings exceeding the preset gear shifting threshold, so that the vehicle can run with minimized energy consumption, thereby effectively improving the vehicle's driving efficiency.

[0060] It should be noted that, as those skilled in the art can understand, the preset shifting threshold can be determined based on actual test data and statistical methods. It should also be noted that, as those skilled in the art can understand, if there is no other gearbox gear corresponding to an energy loss that is less than the energy loss corresponding to the current gearbox gear, and the absolute value of the difference between the two is less than the preset shifting threshold, no shifting operation is performed, that is, the current gearbox gear is still used as the target gearbox gear.

[0061] Specifically, take the gearbox having two gears, 1st gear and 2nd gear, as an example, wherein 1st gear is a high-speed ratio gear and 2nd gear is a low-speed ratio gear. Figure 2 , which is a schematic diagram of the gearbox shifting principle provided by one embodiment of the present invention. Figure 2 As shown, when the vehicle is driven in economy mode (eco mode), such as when driving the WLTC (World Light Vehicle Test Procedure), the system will preset the 2nd gear as the starting gear, and based on the goal of optimal energy consumption, solve the energy consumption values ​​under different gears, and comprehensively consider the gear shifting energy consumption value and the gear shifting threshold. According to the actual driving conditions and the results of dynamic loss evaluation, if the gear is reduced from 2nd gear to 1st gear, the total energy consumption can be reduced, and the gear shifting energy loss can be considered in time, the system will also choose to shift gears to maximize the overall efficiency of the system.

[0062] In some exemplary embodiments, determining the target gearbox gear according to the energy loss information corresponding to each gearbox gear includes:

[0063] According to the energy loss information, power response information and driving comfort information corresponding to each gearbox gear, the gearbox gear that meets the preset multi-objective optimization conditions is used as the target gearbox gear.

[0064] Therefore, by considering energy loss, power response and driving comfort in the shift decision, and establishing a multi-objective optimization framework, the best balance can be found between these different objectives (minimum energy loss, optimal power response, and optimal driving comfort). Specifically, in the vehicle sports mode, the power is given priority, and the power response is mainly considered to achieve the strongest power performance of the electric drive system. For example, when the road ahead is predicted to be uphill, the upshift is delayed to ensure the power; in the vehicle economic mode, energy loss is given priority. For example, if the traffic congestion ahead is predicted based on the real-time road condition information, the gear with a lower speed ratio is preferred. In summary, by using the gearbox gear that meets the preset multi-objective optimization conditions as the target gearbox gear, not only the economy and power performance of the car can be optimized, but also the overall driving experience can be improved. At the same time, while ensuring that the vehicle has good economy, the driving habits of the owner and the changes in real-time working conditions are comprehensively considered to achieve the best balance between power and economy.

[0065] It should be noted that, as can be understood by those skilled in the art, for each gearbox gear, the driving comfort information corresponding to the gearbox gear can be determined according to the rate of change of the acceleration of the wheel at the gearbox gear.

[0066] In some exemplary implementations, for each gearbox gear, the power response information corresponding to the gearbox gear is determined based on an external characteristic curve of the electric drive system at the gearbox gear.

[0067] Specifically, for each gearbox gear, the power response information corresponding to the gearbox gear is determined according to the maximum envelope of the external characteristic curve of the electric drive system at the gearbox gear, so as to achieve the strongest power performance of the electric drive system.

[0068] In some exemplary embodiments, the transmission gear control method provided by the present invention further includes:

[0069] Real-time vehicle status information is acquired, and an optimal gear shifting timing is determined based on the real-time vehicle status information and the predicted operating condition information.

[0070] Therefore, by acquiring real-time vehicle status information and determining the optimal gear shifting timing based on the real-time vehicle status information and the predicted operating condition information, it can not only ensure a smooth transition when changing speed, reduce energy loss and improve ride comfort, but also help reduce mechanical wear caused by unnecessary gear shifting operations, thereby helping to extend the service life of the vehicle.

[0071] In some exemplary embodiments, the vehicle status information includes vehicle speed information, acceleration information, and accelerator pedal position information.

[0072] Therefore, by determining the best gear shifting time based on real-time vehicle speed information, acceleration information and accelerator pedal position information, it is possible to further effectively ensure a smooth transition during gear shifting, reduce energy loss and improve ride comfort.

[0073] In some exemplary embodiments, determining the optimal shift timing according to the real-time vehicle state information and the predicted operating condition information includes:

[0074] The real-time vehicle status information and the predicted operating condition information are input into a pre-trained gear shift prediction model to determine whether the current time is the best time to shift gears.

[0075] By using a pre-trained gear shift prediction model to determine the optimal gear shift timing, it can help achieve efficient gear switching logic, further ensuring smooth transition when changing speed, reducing energy loss and improving ride comfort.

[0076] It should be noted that, as those skilled in the art can understand, the gear shift prediction model can be any machine learning model. Specifically, for the specific content of how to obtain a trained gear shift prediction model, reference can be made to the relevant content in the field of machine learning known to those skilled in the art, and will not be elaborated here. It should also be noted that, as those skilled in the art can understand, if the real-time vehicle status information (including vehicle speed, acceleration, accelerator pedal position and other information) and the predicted operating condition information match the vehicle status information and operating condition information corresponding to the optimal shift point determined in the historical data, it indicates that the current time is the best time to shift gears.

[0077] In some exemplary embodiments, the transmission gear control method provided by the present invention further includes:

[0078] The network parameters of the gear shift prediction model are updated in real time according to the vehicle state information and the operating condition information when the gear shift operation is performed.

[0079] Therefore, by updating the network parameters of the shift prediction model in real time according to the vehicle status information and operating condition information when performing the shift operation, the shift points can be continuously learned and optimized to adapt to the driver's driving behavior and the specific response of the vehicle, thereby helping to achieve optimal energy efficiency and power performance.

[0080] Based on the same inventive concept, the present invention also provides a transmission controller, please refer to Figure 3 , which is a schematic block diagram of a transmission controller provided by one embodiment of the present invention. Figure 3As shown, the transmission controller includes a processor 101 and a memory 103, and a computer program is stored in the memory 103. When the computer program is executed by the processor 101, the transmission gear position control method described above is implemented. Since the transmission controller provided by the present invention and the transmission gear position control method provided by the present invention belong to the same inventive concept, the transmission controller provided by the present invention at least has all the beneficial effects of the transmission gear position control method provided by the present invention. For details, reference can be made to the relevant contents above regarding the beneficial effects of the transmission gear position control method provided by the present invention, so the beneficial effects of the transmission controller provided by the present invention will not be described one by one here.

[0081] like Figure 3 As shown, the transmission controller also includes a communication interface 102 and a communication bus 104, wherein the processor 101, the communication interface 102, and the memory 103 communicate with each other through the communication bus 104. The communication bus 104 includes but is not limited to a CAN bus, etc. For ease of representation, only one thick line is used in the figure, but it does not mean that there is only one bus or one type of bus. The communication interface 102 is used for communication between the transmission controller and other vehicle controllers (such as a vehicle controller, a motor controller, etc., not shown in the figure). The communication bus 104 connects the transmission controller and other vehicle controllers (such as a vehicle controller, a motor controller, etc., not shown in the figure) and other dispersed nodes into a closed-loop system, so that each vehicle controller can communicate and transmit data in multiple working states (parking state, charging state, starting state, running state, vehicle forward and backward state, feedback braking state, mechanical braking state, general fault state, major fault state), thereby realizing the control function of the vehicle.

[0082] The processor 101 referred to in the present invention may be a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field-programmable gate arrays (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. The general-purpose processor may be a microprocessor or any conventional processor, etc. The processor 101 is the control center of the transmission controller, and various interfaces and lines are used to connect various parts of the entire transmission controller.

[0083] The memory 103 can be used to store the computer program. The processor 101 implements various functions of the transmission controller by running or executing the computer program stored in the memory 103 and calling the data stored in the memory 103. The memory 103 may include non-volatile and / or volatile memory. Non-volatile memory may include read-only memory (ROM), programmable memory (PROM), electrically programmable memory (EPROM), electrically erasable programmable memory (EEPROM) or flash memory. Volatile memory may include random access memory (RAM) or external cache memory. By way of illustration and not limitation, random access memory is available in a variety of forms, such as static random access memory (SRAM), dynamic random access memory (DRAM), synchronous random access memory (SDRAM), double data rate synchronous random access memory (DDRSDRAM), enhanced synchronous random access memory (ESDRAM), synchronous link (Synchlink) dynamic random access memory (SLDRAM), memory bus (Rambus) direct random access memory (RDRAM), direct memory bus dynamic random access memory (DRDRAM), and memory bus dynamic random access memory (RDRAM), etc.

[0084] The present invention also provides a readable storage medium, wherein a computer program is stored in the readable storage medium, and when the computer program is executed by a processor, the transmission gear position control method described above can be implemented. Since the readable storage medium provided by the present invention and the transmission gear position control method provided by the present invention belong to the same inventive concept, the readable storage medium provided by the present invention at least has all the beneficial effects of the transmission gear position control method provided by the present invention. For details, reference can be made to the relevant contents above regarding the beneficial effects of the transmission gear position control method provided by the present invention, so the beneficial effects of the readable storage medium provided by the present invention will not be described one by one here.

[0085] Specifically, the readable storage medium provided by the present invention can adopt any combination of one or more computer-readable media. The readable medium can be a computer-readable signal medium or a computer-readable storage medium. The computer-readable storage medium can be, for example, but not limited to, a system, device or component of electricity, magnetism, light, electromagnetic, infrared or semiconductor, or any combination of the above. More specific examples (non-exhaustive enumeration) of computer-readable storage media include: an electrical connection with one or more wires, a portable computer hard disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the above. In this article, a computer-readable storage medium can be any tangible medium containing or storing a program, which can be used by an instruction execution system, a device or a device or used in combination with it.

[0086] Further, a computer-readable signal medium may include a data signal propagated in a baseband or as part of a carrier wave, wherein a computer-readable program code is carried. Such propagated data signals may take a variety of forms, including but not limited to electromagnetic signals, optical signals, or any suitable combination of the above. A computer-readable signal medium may also be any computer-readable medium other than a computer-readable storage medium, which may send, propagate, or transmit a program for use by or in conjunction with an instruction execution system, device, or device. The program code contained on the computer-readable medium may be transmitted using any suitable medium, including but not limited to wireless, wire, optical cable, RF, etc., or any suitable combination of the above.

[0087] Computer program code for performing the operation of the present invention may be written in one or more programming languages ​​or a combination thereof, including object-oriented programming languages ​​such as Java, Smalltalk, C++, and conventional procedural programming languages ​​such as "C" or similar programming languages. The program code may be executed entirely on the user's computer, partially on the user's computer, as a separate software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In the case of a remote computer, the remote computer may be connected to the user's computer through any type of network, including a local area network (LAN) or a wide area network (WAN), or may be connected to an external computer (e.g., via the Internet using an Internet service provider).

[0088] In summary, compared with the prior art, the transmission gear control method, transmission controller and readable storage medium provided by the present invention have the following beneficial effects:

[0089] The present invention first obtains real-time road condition information, and obtains the predicted operating condition information of the electric drive system according to the real-time road condition information; then obtains the operating condition energy loss information and the shifting energy loss information of the electric drive system under different gearbox gears according to the energy loss distribution information of the electric drive system under different gearbox gears obtained in advance and the predicted operating condition information; finally, the target gearbox gear is determined according to the operating condition energy loss information and the shifting energy loss information of the electric drive system under different gearbox gears. It can be seen that the present invention can optimize the energy consumption of the whole vehicle, thereby helping to improve the cruising range, reduce energy consumption, and be environmentally friendly. At the same time, the present invention can intelligently predict the operating condition of the vehicle (i.e. the operating condition of the electric drive system) and make gear planning in advance, and can select the gearbox gear with less loss to operate according to the upcoming uphill, downhill or congested area to ensure that the vehicle is in a suitable gearbox gear, so as to optimize the performance and energy consumption of the whole vehicle, and then effectively improve the driving experience of the whole vehicle. In addition, the present invention can optimize the energy consumption of the whole vehicle while ensuring the power of the vehicle, and achieve the best balance between power and economy. In addition, the present invention determines the optimal gear shifting timing based on real-time vehicle status information and predicted operating condition information, which not only ensures a smooth transition during gear shifting, reduces energy loss and improves ride comfort, but also helps reduce mechanical wear caused by unnecessary gear shifting operations, thereby helping to extend the service life of the vehicle.

[0090] It should be noted that the devices and methods disclosed in the embodiments of this article can also be implemented in other ways. The device implementation described above is only schematic. For example, the flowcharts and block diagrams in the accompanying drawings show the possible architecture, functions and operations of the devices, methods and computer program products according to multiple embodiments of this article. In this regard, each box in the flowchart or block diagram can represent a part of a module, program or code, and the module, program segment or part of the code contains one or more executable instructions for implementing the specified logical function, and the module, program segment or part of the code contains one or more executable instructions for implementing the specified logical function. It should also be noted that in some alternative implementations, the functions marked in the box can also occur in a different order from the order marked in the accompanying drawings. For example, two consecutive boxes can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, depending on the functions involved. It should also be noted that each box in the block diagram and / or flowchart, and the combination of boxes in the block diagram and / or flowchart can be implemented by a dedicated hardware-based system for performing a specified function or action, or can be implemented by a combination of dedicated hardware and computer instructions. In addition, the functional modules in the various embodiments of this document may be integrated together to form an independent part, or each module may exist independently, or two or more modules may be integrated to form an independent part.

[0091] It should also be noted that the above description is only a description of the preferred embodiment of the present invention, and is not any limitation on the scope of the present invention. Any changes and modifications made by a person skilled in the art in the field of the present invention based on the above disclosure are within the scope of protection of the present invention. Obviously, a person skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations fall within the scope of the present invention and its equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A gearbox gear position control method, wherein the gearbox has at least two gear positions, characterized in that: The control method comprises: Acquiring real-time traffic information, and acquiring predicted operating condition information of the electric drive system based on the real-time traffic information; According to the pre-acquired energy loss distribution information of the electric drive system under different gearbox gears and the predicted operating condition information, the operating condition energy loss information and the gear shifting energy loss information of the electric drive system under different gearbox gears are acquired; The target gearbox gear is determined according to the operating condition energy loss information of the electric drive system under different gearbox gears and the gear shifting energy loss information.

2. The gearbox gear control method according to claim 1, characterized in that: The control method further comprises: Real-time vehicle status information is acquired, and an optimal gear shifting timing is determined based on the real-time vehicle status information and the predicted operating condition information.

3. The gearbox gear control method according to claim 2, characterized in that: The determining the optimal shifting time according to the real-time vehicle state information and the predicted operating condition information includes: The real-time vehicle status information and the predicted operating condition information are input into a pre-trained gear shift prediction model to determine whether the current time is the best time to shift gears.

4. The gearbox gear control method according to claim 2, characterized in that: The vehicle status information includes vehicle speed information, acceleration information and accelerator pedal position information.

5. The transmission gear position control method according to claim 1, characterized in that: Determining the target gearbox gear according to the operating condition energy loss information of the electric drive system under different gearbox gears and the gear shifting energy loss information includes: Determining energy loss information corresponding to the current gearbox gear according to the working condition energy loss information of the electric drive system under the current gearbox gear; For each other gearbox gear position except the current gearbox gear position, determine the energy loss information corresponding to the other gearbox gear position according to the operating condition energy loss information of the electric drive system in the other gearbox gear position and the gear shift energy loss information when switching from the current gearbox gear position to the other gearbox gear position; The target gearbox gear is determined according to the energy loss information corresponding to each gearbox gear.

6. The gearbox gear control method according to claim 5, characterized in that: The target gearbox gear is determined according to the energy loss information corresponding to each gearbox gear, and the target gearbox gear is determined, including: If there is at least one other gearbox gear position whose energy loss is smaller than the energy loss corresponding to the current gearbox gear position, and the absolute value of the difference between the two is larger than the preset gear shift threshold, then the other gearbox gear position with the smallest energy loss is used as the target gearbox gear position; Otherwise, the current gearbox gear is used as the target gearbox gear.

7. The transmission gear position control method according to claim 5, characterized in that: The step of determining the target gearbox gear according to the energy loss information corresponding to each gearbox gear comprises: According to the energy loss information, power response information and driving comfort information corresponding to each gearbox gear, the gearbox gear that meets the preset multi-objective optimization conditions is used as the target gearbox gear.

8. The transmission gear position control method according to claim 7, characterized in that: For each gearbox gear, the power response information corresponding to the gearbox gear is determined according to the external characteristic curve of the electric drive system under the gearbox gear.

9. The transmission gear position control method according to claim 1, characterized in that: The step of obtaining predicted operating condition information of the electric drive system according to the real-time road condition information includes: Acquiring vehicle speed prediction information according to the real-time road condition information; According to the vehicle speed prediction information, the predicted operating condition information of the electric drive system is obtained.

10. A transmission controller, characterized in that: The invention comprises a processor and a memory, wherein a computer program is stored in the memory, and when the computer program is executed by the processor, the transmission gear control method according to any one of claims 1 to 9 is implemented.

11. A readable storage medium, characterized in that: The readable storage medium stores a computer program, and when the computer program is executed by a processor, the transmission gear control method according to any one of claims 1 to 9 is implemented.

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