Rapid calculation method for optimal gear shifting line of engine gearbox and related device

Abstract

The embodiment of the invention relates to the field of data processing, and provides a rapid calculation method and related device for an optimal gear shifting line of an engine gearbox, and the method comprises the steps: obtaining the basic data information of an engine; determining a vehicle speed and wheel end torque relation graph corresponding to each gear of the vehicle according to the basic data information, and obtaining a vehicle speed and wheel rotation torque relation graph set; gear boundary lines between gears are determined for the vehicle speed and wheel rotation torque relation graphs in the vehicle speed and wheel rotation torque relation graph set; determining an initial gear shifting line between the gears according to the gear boundary line; and performing simulation optimization processing on the initial gear shifting line to obtain the optimal gear shifting line, so that simulation optimization processing can be performed on the initial gear shifting line to obtain the optimal gear shifting line, and the efficiency of determining the optimal gear shifting line is improved.

Description

Technical Field

[0001] This application relates to the field of data processing technology, specifically to a method and apparatus for rapidly calculating the optimal shift line of an engine transmission. Background Technology

[0002] Existing technologies for calculating the theoretically optimal shift line for engine transmissions have several shortcomings. First, many traditional methods rely on extensive real-vehicle test data, leading to long development cycles, high costs, and low efficiency. For example, some methods require determining the upshift speed point after a prototype vehicle is produced, through multiple sets of accelerator pedal opening and fuel consumption tests at different gears. This is not only time-consuming but also susceptible to random factors and experimental errors.

[0003] While some calculation methods take into account factors such as engine efficiency and transmission efficiency, they are often too complex in practice, leading to increased workload in subsequent prototype tuning, extended development cycles, and lower efficiency. Summary of the Invention

[0004] This application provides a method and related apparatus for rapidly calculating the optimal shift line of an engine transmission, which can simulate and optimize the initial shift line to obtain the optimal shift line, thereby improving the efficiency of determining the optimal shift line.

[0005] A first aspect of this application provides a method for rapidly calculating the optimal shift line of an engine transmission, the method comprising: Obtain basic engine data; Based on the aforementioned basic data information, a relationship diagram between vehicle speed and wheel torque for each gear is determined, resulting in a set of vehicle speed and wheel torque relationship diagrams. Determine the gear boundary line between each gear in the set of vehicle speed and wheel torque relationship graphs; Determine the initial shift line between gears based on the gear boundary line; The initial shift line is simulated and optimized to obtain the optimal shift line.

[0006] In this example, by acquiring basic engine data, a vehicle speed and wheel torque relationship diagram corresponding to each gear is determined based on the basic data, resulting in a set of vehicle speed and wheel torque relationship diagrams. The gear boundary lines between each gear are then determined from these diagrams. Based on these boundary lines, initial shift lines between gears are determined. These initial shift lines are then simulated and optimized to obtain the optimal shift line. Therefore, the efficiency of determining the optimal shift line is improved.

[0007] In one possible implementation, the step of determining the vehicle speed and wheel torque relationship diagram corresponding to each gear based on the basic data information, resulting in a set of vehicle speed and wheel torque relationship diagrams, includes: Extract universal characteristic speed, universal characteristic torque, gearbox ratio, differential ratio, and transmission efficiency from basic data information; Extract the gear ratio corresponding to each gear from the gear ratio; Based on the gearbox ratio, universal characteristic speed, universal characteristic torque, differential ratio, and transmission efficiency corresponding to each gear, determine the corresponding vehicle speed and wheel torque relationship diagram, and obtain a set of vehicle speed and wheel torque relationship diagrams.

[0008] In one possible implementation, the step of determining the corresponding vehicle speed and wheel torque relationship diagram based on the gearbox ratio, universal characteristic speed, universal characteristic torque, differential ratio, and transmission efficiency for each gear position yields a set of vehicle speed and wheel torque relationship diagrams, including: The relationship between vehicle speed and wheel torque is determined using the following formula, based on the gearbox ratio, universal characteristic speed, universal characteristic torque, differential ratio, and transmission efficiency for each gear. This results in a set of vehicle speed vs. wheel torque relationship graphs. ; ; in, Let n be the vehicle speed in the j-th gear, n be the universal characteristic speed, and T be the universal characteristic torque. Let i be the gear ratio of the j-th gearbox, i0 be the differential ratio, and η be the transmission efficiency.

[0009] In one possible implementation, determining the gear boundary line between each gear in the set of vehicle speed and wheel torque relationship graphs includes: Based on the vehicle speed and wheel torque relationship graph in the set of vehicle speed and wheel torque relationship graphs, the high fuel consumption points in the overlapping areas between each gear are removed to obtain the optimal gear under the current operating conditions. The optimal gear position under the current operating conditions is used to determine the gear boundary line, thus obtaining the gear boundary line between each gear position.

[0010] In one possible implementation, the step of simulating and optimizing the initial shift line to obtain the optimal shift line includes: The initial gear position line is embedded into the vehicle model for simulation, and the simulation results are obtained. The initial shift line is optimized based on the simulation results to obtain the optimal shift line.

[0011] A second aspect of this application provides a rapid calculation device for the optimal shift line of an engine transmission, the device comprising: The acquisition unit is used to acquire basic data information of the engine. The first determining unit is used to determine the relationship diagram between vehicle speed and wheel torque for each gear of the vehicle based on the basic data information, and to obtain a set of relationship diagrams between vehicle speed and wheel torque. The second determining unit is used to determine the gear boundary line between each gear in the set of vehicle speed and wheel torque relationship diagrams; The third determining unit is used to determine the initial shift line between gears based on the gear boundary line; An optimization unit is used to optimize the initial shift line to obtain the optimal shift line.

[0012] In one possible implementation, the first determining unit is specifically used for: Extract universal characteristic speed, universal characteristic torque, gearbox ratio, differential ratio, and transmission efficiency from basic data information; Extract the gear ratio corresponding to each gear from the gear ratio; Based on the gearbox ratio, universal characteristic speed, universal characteristic torque, differential ratio, and transmission efficiency corresponding to each gear, determine the corresponding vehicle speed and wheel torque relationship diagram, and obtain a set of vehicle speed and wheel torque relationship diagrams.

[0013] In one possible implementation, regarding the determination of the corresponding vehicle speed and wheel-end torque relationship diagram based on the gearbox ratio, universal characteristic speed, universal characteristic torque, differential ratio, and transmission efficiency for each gear, to obtain a set of vehicle speed and wheel-end torque relationship diagrams, the first determining unit is specifically used for: The relationship between vehicle speed and wheel torque is determined using the following formula, based on the gearbox ratio, universal characteristic speed, universal characteristic torque, differential ratio, and transmission efficiency for each gear. This results in a set of vehicle speed vs. wheel torque relationship graphs. ; ; in, Let n be the vehicle speed in the j-th gear, n be the universal characteristic speed, and T be the universal characteristic torque. Let i be the gear ratio of the j-th gearbox, i0 be the differential ratio, and η be the transmission efficiency.

[0014] In one possible implementation, the second determining unit is specifically used for: Based on the vehicle speed and wheel torque relationship graph in the set of vehicle speed and wheel torque relationship graphs, the high fuel consumption points in the overlapping areas between each gear are removed to obtain the optimal gear under the current operating conditions. The optimal gear position under the current operating conditions is used to determine the gear boundary line, thus obtaining the gear boundary line between each gear position.

[0015] In one possible implementation, the optimization unit is specifically used for: The initial gear position line is embedded into the vehicle model for simulation, and the simulation results are obtained. The initial shift line is optimized based on the simulation results to obtain the optimal shift line.

[0016] A third aspect of this application provides a terminal including a processor, an input device, an output device, and a memory, wherein the processor, input device, output device, and memory are interconnected, wherein the memory is used to store a computer program, the computer program including program instructions, and the processor is configured to invoke the program instructions to execute the step instructions as described in the first aspect of this application.

[0017] A fourth aspect of this application provides a computer-readable storage medium storing a computer program for electronic data interchange, wherein the computer program causes a computer to perform some or all of the steps described in the first aspect of this application.

[0018] A fifth aspect of this application provides a computer program product, wherein the computer program product includes a non-transitory computer-readable storage medium storing a computer program operable to cause a computer to perform some or all of the steps described in the first aspect of this application. The computer program product may be a software installation package. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This application provides a flowchart illustrating a method for rapidly calculating the optimal shift line of an engine transmission. Figure 2 This is a schematic diagram of the structure of a terminal provided in an embodiment of this application; Figure 3This application provides a schematic diagram of the structure of a device for rapidly calculating the optimal shift line of an engine transmission. Detailed Implementation

[0021] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0022] The terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish different objects, not to describe a specific order. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or apparatus that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to these processes, methods, products, or apparatuses.

[0023] In this application, the reference to "embodiment" means that a specific feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a mutually exclusive, independent, or alternative embodiment. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described in this application can be combined with other embodiments.

[0024] To better understand the rapid calculation method for the optimal shift line of an engine and transmission provided in this application, a brief introduction to the method follows. The core of this method is to transform engine performance data into an intuitive graph showing the relationship between vehicle speed and wheel torque, and then draw the optimal shift line between each gear. This strategy not only simplifies the shifting logic but also significantly improves the vehicle's fuel economy. By deeply analyzing the engine's universal characteristic graph and combining it with the vehicle's actual operating parameters, engine performance is transformed into a relationship between vehicle speed and torque at each gear. Based on this, a shifting strategy is formulated by comprehensively considering factors such as fuel consumption rate, power performance, and driving smoothness, ensuring that the vehicle operates in the optimal gear under different operating conditions. To verify the effectiveness of this strategy, it was embedded into a vehicle model for comprehensive operating condition simulation testing. This innovative strategy provides new ideas and methods for energy conservation, emission reduction, and performance improvement in the automotive industry.

[0025] Please see Figure 1 , Figure 1This application provides a flowchart illustrating a method for rapidly calculating the optimal shift line of an engine transmission. Figure 1 As shown, the method includes: 101. Obtain basic engine data information.

[0026] The basic data includes power, torque, and fuel consumption rate at different speeds and loads, constructing a detailed universal characteristic diagram of the engine. The basic data also includes universal characteristic speed, universal characteristic torque, gearbox ratios, differential ratios, and transmission efficiency; the gearbox ratios include the gearbox ratios corresponding to each gear.

[0027] 102. Based on the basic data information, determine the relationship between vehicle speed and wheel torque for each gear, and obtain a set of relationship diagrams between vehicle speed and wheel torque.

[0028] One method for determining the relationship between vehicle speed and wheel torque for each gear based on the aforementioned basic data information, and obtaining a set of vehicle speed and wheel torque relationship diagrams, includes: A1. Extract universal characteristic speed, universal characteristic torque, gearbox ratio, differential ratio, and transmission efficiency from basic data information. A2. Extract the gear ratio corresponding to each gear from the gear ratio; A3. Based on the gearbox ratio, universal characteristic speed, universal characteristic torque, differential ratio and transmission efficiency corresponding to each gear, determine the corresponding vehicle speed and wheel torque relationship diagram to obtain a set of vehicle speed and wheel torque relationship diagrams.

[0029] Specifically, the relationship between vehicle speed and wheel torque is determined using the following formula: based on the gearbox ratio, universal characteristic speed, universal characteristic torque, differential ratio, and transmission efficiency for each gear, a set of vehicle speed vs. wheel torque relationship graphs is obtained. ; ; in, Let n be the vehicle speed in the j-th gear, n be the universal characteristic speed, and T be the universal characteristic torque. Let i be the gear ratio of the j-th gearbox, i0 be the differential ratio, and η be the transmission efficiency.

[0030] 103. Determine the gear boundary line between each gear in the set of vehicle speed and wheel torque relationship graphs.

[0031] One method for determining the gear boundary line between each gear in a set of vehicle speed and wheel torque relationship graphs includes: B1. Based on the vehicle speed and wheel torque relationship graph in the set of vehicle speed and wheel torque relationship graphs, remove the high fuel consumption points in the overlapping areas between each gear to obtain the optimal gear under the current operating conditions. B2. Determine the gear boundary line based on the optimal gear under the current working conditions to obtain the gear boundary line between each gear.

[0032] Specifically, after obtaining the vehicle speed and wheel torque graphs for each gear, the overlapping areas between gears were further analyzed. Within these overlapping areas, the fuel consumption rate of different gears was compared, and the gear with the lower fuel consumption rate was selected as the optimal gear for the current operating conditions.

[0033] After determining the optimal gear, you can use experience or historical data to determine the gear boundary line.

[0034] 104. Determine the initial shift line between gears based on the gear boundary line.

[0035] The initial shift line between gears can be determined based on empirical values ​​or historical data using the gear boundary line. The initial shift line includes upshift line and downshift line.

[0036] 105. Perform simulation optimization on the initial shift line to obtain the optimal shift line.

[0037] One method for simulating and optimizing the initial shift line to obtain the optimal shift line includes: C1. Embed the initial gear line into the vehicle model for simulation operation and obtain the simulation results; C2. Optimize the initial shift line based on the simulation results to obtain the optimal shift line.

[0038] Specifically, the vehicle model is a pre-defined virtual vehicle model corresponding to the actual vehicle. This virtual vehicle model can simulate the vehicle's operation under various working conditions and driving conditions on various road surfaces.

[0039] In this example, by acquiring basic engine data, a vehicle speed and wheel torque relationship diagram corresponding to each gear is determined based on the basic data, resulting in a set of vehicle speed and wheel torque relationship diagrams. The gear boundary lines between each gear are then determined from these diagrams. Based on these boundary lines, initial shift lines between gears are determined. These initial shift lines are then simulated and optimized to obtain the optimal shift line. Therefore, the efficiency of determining the optimal shift line is improved.

[0040] In one specific implementation, a fast calculation method for the optimal shift line of the engine and transmission is also provided, as follows: First, this invention utilizes fundamental engine data, including power, torque, and fuel consumption rate at different speeds and loads, to construct a detailed universal characteristic diagram of the engine. Then, based on the gearbox ratios, vehicle rolling radius, and transmission system efficiency, these engine characteristics are converted into a graph showing the relationship between vehicle speed and wheel torque at each gear. 1st gear: 2nd gear: ··· ··· All other gears are calculated using the same method. Where v is vehicle speed, n is universal characteristic speed, T is universal characteristic torque, ig is the gearbox ratio, i0 is the differential ratio, and η is the transmission efficiency.

[0041] After obtaining the vehicle speed and wheel torque diagrams for each gear, this invention further analyzes the overlapping areas between the gears. Within these overlapping areas, by comparing the fuel consumption rates of different gears, this invention selects the gear with the lower fuel consumption rate as the optimal gear for the current operating conditions. This strategy ensures that the vehicle operates in the most economical manner under different speed and load conditions. Next, the invention defines the boundary lines between each gear position. Upshift and downshift lines are drawn based on engineering experience. To verify the effectiveness and accuracy of the established shift lines, this invention embedded them into a vehicle model for performance calculations. By simulating actual road driving conditions, the distribution of the engine operating point on the universal characteristic diagram was observed. Considering both power and ride comfort, this invention provides targeted shift line optimization strategies for the poor operating conditions identified during the verification process. By fine-tuning the shift point positions or adjusting the shift logic, the engine operating point is made closer to the economic zone while being more rational, further improving the overall performance of the vehicle.

[0042] For examples consistent with the above embodiments, please refer to... Figure 2 , Figure 2 This is a schematic diagram of the structure of a terminal provided in an embodiment of this application, such as... Figure 2 As shown, it includes a processor, an input device, an output device, and a memory, which are interconnected. The memory is used to store a computer program, which includes program instructions. The processor is configured to call the program instructions. The program includes instructions for performing the following steps. Obtain basic engine data; Based on the aforementioned basic data information, a relationship diagram between vehicle speed and wheel torque for each gear is determined, resulting in a set of vehicle speed and wheel torque relationship diagrams. Determine the gear boundary line between each gear in the set of vehicle speed and wheel torque relationship graphs; Determine the initial shift line between gears based on the gear boundary line; The initial shift line is simulated and optimized to obtain the optimal shift line.

[0043] In this example, by acquiring basic engine data, a vehicle speed and wheel torque relationship diagram corresponding to each gear is determined based on the basic data, resulting in a set of vehicle speed and wheel torque relationship diagrams. The gear boundary lines between each gear are then determined from these diagrams. Based on these boundary lines, initial shift lines between gears are determined. These initial shift lines are then simulated and optimized to obtain the optimal shift line. Therefore, the efficiency of determining the optimal shift line is improved.

[0044] The above mainly describes the solutions of the embodiments of this application from the perspective of the method execution process. It is understood that, in order to achieve the above functions, the terminal includes the corresponding hardware structure and / or software modules for executing each function. Those skilled in the art should readily recognize that, in conjunction with the units and algorithm steps of the various examples described in the embodiments provided herein, this application can be implemented in hardware or a combination of hardware and computer software. Whether a function is executed in hardware or by computer software driving hardware depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0045] This application embodiment can divide the terminal into functional units according to the above method example. For example, each function can be divided into a separate functional unit, or two or more functions can be integrated into one processing unit. The integrated unit can be implemented in hardware or as a software functional unit. It should be noted that the unit division in this application embodiment is illustrative and only represents one logical functional division. In actual implementation, there may be other division methods.

[0046] For those consistent with the above, please refer to Figure 3 , Figure 3 This application provides a schematic diagram of a device for rapidly calculating the optimal shift line of an engine transmission, as described in an embodiment of the present application. Figure 3 As shown, the device includes: Acquisition unit 301 is used to acquire basic data information of the engine; The first determining unit 302 is used to determine the relationship diagram between vehicle speed and wheel torque for each gear of the vehicle based on the basic data information, and to obtain a set of relationship diagrams between vehicle speed and wheel torque. The second determining unit 303 is used to determine the gear boundary line between each gear in the set of vehicle speed and wheel torque relationship diagrams; The third determining unit 304 is used to determine the initial shift line between gears based on the gear boundary line; The optimization unit 305 is used to optimize the initial shift line to obtain the optimal shift line.

[0047] In one possible implementation, the first determining unit 302 is specifically used for: Extract universal characteristic speed, universal characteristic torque, gearbox ratio, differential ratio, and transmission efficiency from basic data information; Extract the gear ratio corresponding to each gear from the gear ratio; Based on the gearbox ratio, universal characteristic speed, universal characteristic torque, differential ratio, and transmission efficiency corresponding to each gear, determine the corresponding vehicle speed and wheel torque relationship diagram, and obtain a set of vehicle speed and wheel torque relationship diagrams.

[0048] In one possible implementation, regarding the determination of the corresponding vehicle speed and wheel-end torque relationship diagram based on the gearbox ratio, universal characteristic speed, universal characteristic torque, differential ratio, and transmission efficiency for each gear, to obtain a set of vehicle speed and wheel-end torque relationship diagrams, the first determining unit 302 is specifically used for: The relationship between vehicle speed and wheel torque is determined using the following formula, based on the gearbox ratio, universal characteristic speed, universal characteristic torque, differential ratio, and transmission efficiency for each gear. This results in a set of vehicle speed vs. wheel torque relationship graphs. ; ; in, Let n be the vehicle speed in the j-th gear, n be the universal characteristic speed, and T be the universal characteristic torque. Let i be the gear ratio of the j-th gearbox, i0 be the differential ratio, and η be the transmission efficiency.

[0049] In one possible implementation, the second determining unit 303 is specifically used for: Based on the vehicle speed and wheel torque relationship graph in the set of vehicle speed and wheel torque relationship graphs, the high fuel consumption points in the overlapping areas between each gear are removed to obtain the optimal gear under the current operating conditions. The optimal gear position under the current operating conditions is used to determine the gear boundary line, thus obtaining the gear boundary line between each gear position.

[0050] In one possible implementation, the optimization unit 305 is specifically used for: The initial gear position line is embedded into the vehicle model for simulation, and the simulation results are obtained. The initial shift line is optimized based on the simulation results to obtain the optimal shift line.

[0051] This application also provides a computer storage medium storing a computer program for electronic data interchange, which causes a computer to perform some or all of the steps of a rapid calculation method for the optimal shift line of any engine transmission as described in the above method embodiments.

[0052] This application also provides a computer program product, which includes a non-transitory computer-readable storage medium storing a computer program that causes a computer to perform some or all of the steps of any of the rapid calculation methods for the optimal shift line of an engine transmission as described in the above method embodiments.

[0053] It should be noted that, for the sake of simplicity, the foregoing method embodiments are all described as a series of actions. However, those skilled in the art should understand that this application is not limited to the described order of actions, as some steps may be performed in other orders or simultaneously according to this application. Furthermore, those skilled in the art should also understand that the embodiments described in the specification are preferred embodiments, and the actions and modules involved are not necessarily essential to this application.

[0054] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0055] In the several embodiments provided in this application, it should be understood that the disclosed apparatus can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces; the indirect coupling or communication connection between devices or units may be electrical or other forms.

[0056] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0057] Furthermore, the functional units in the various embodiments of the application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software program module.

[0058] If the integrated unit is implemented as a software program module and sold or used as an independent product, it can be stored in a computer-readable storage device (CMD). Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a memory and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of this application. The aforementioned memory includes various media capable of storing program code, such as USB flash drives, read-only memory (ROM), random access memory (RAM), portable hard drives, magnetic disks, or optical disks.

[0059] Those skilled in the art will understand that all or part of the steps in the various methods of the above embodiments can be implemented by a program instructing related hardware. The program can be stored in a computer-readable storage device, which may include: a flash drive, a read-only memory, a random access memory, a magnetic disk, or an optical disk, etc.

[0060] The embodiments of this application have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this application. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of this application. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this application. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. A method for rapidly calculating the optimal shift line of an engine transmission, characterized in that, The method includes: Obtain basic engine data; Based on the aforementioned basic data information, a relationship diagram between vehicle speed and wheel torque for each gear is determined, resulting in a set of vehicle speed and wheel torque relationship diagrams. Determine the gear boundary line between each gear in the set of vehicle speed and wheel torque relationship graphs; Determine the initial shift line between gears based on the gear boundary line; The initial shift line is simulated and optimized to obtain the optimal shift line.

2. The method for rapidly calculating the optimal shift line of an engine transmission according to claim 1, characterized in that, The process involves determining the relationship between vehicle speed and wheel torque for each gear based on the aforementioned basic data information, resulting in a set of vehicle speed and wheel torque relationship diagrams, including: Extract universal characteristic speed, universal characteristic torque, gearbox ratio, differential ratio, and transmission efficiency from basic data information; Extract the gear ratio corresponding to each gear from the gear ratio; Based on the gearbox ratio, universal characteristic speed, universal characteristic torque, differential ratio, and transmission efficiency corresponding to each gear, determine the corresponding vehicle speed and wheel torque relationship diagram, and obtain a set of vehicle speed and wheel torque relationship diagrams.

3. The method for rapidly calculating the optimal shift line of an engine and transmission according to claim 2, characterized in that, The process involves determining the corresponding vehicle speed and wheel torque relationship diagram based on the gearbox ratio, universal characteristic speed, universal characteristic torque, differential ratio, and transmission efficiency for each gear, resulting in a set of vehicle speed and wheel torque relationship diagrams, including: The relationship between vehicle speed and wheel torque is determined using the following formula, based on the gearbox ratio, universal characteristic speed, universal characteristic torque, differential ratio, and transmission efficiency for each gear. This results in a set of vehicle speed vs. wheel torque relationship graphs. ； ； in, Let n be the vehicle speed in the j-th gear, n be the universal characteristic speed, and T be the universal characteristic torque. Let i be the gear ratio of the j-th gearbox, i0 be the differential ratio, and η be the transmission efficiency.

4. The method for rapidly calculating the optimal shift line of an engine transmission according to any one of claims 1-3, characterized in that, The determination of the gear boundary lines between each gear in the set of vehicle speed and wheel torque relationship graphs includes: Based on the vehicle speed and wheel torque relationship graph in the set of vehicle speed and wheel torque relationship graphs, the high fuel consumption points in the overlapping areas between each gear are removed to obtain the optimal gear under the current operating conditions. The optimal gear position under the current operating conditions is used to determine the gear boundary line, thus obtaining the gear boundary line between each gear position.

5. The method for rapidly calculating the optimal shift line of an engine and transmission according to claim 4, characterized in that, The step of simulating and optimizing the initial shift line to obtain the optimal shift line includes: The initial gear position line is embedded into the vehicle model for simulation, and the simulation results are obtained. The initial shift line is optimized based on the simulation results to obtain the optimal shift line.

6. A rapid calculation device for the optimal shift line of an engine transmission, characterized in that, The device includes: The acquisition unit is used to acquire basic data information of the engine. The first determining unit is used to determine the relationship diagram between vehicle speed and wheel torque for each gear of the vehicle based on the basic data information, and to obtain a set of relationship diagrams between vehicle speed and wheel torque. The second determining unit is used to determine the gear boundary line between each gear in the set of vehicle speed and wheel torque relationship diagrams; The third determining unit is used to determine the initial shift line between gears based on the gear boundary line; An optimization unit is used to optimize the initial shift line to obtain the optimal shift line.

7. The rapid calculation device for the optimal shift line of an engine transmission according to claim 6, characterized in that, The first determining unit is specifically used for: Extract universal characteristic speed, universal characteristic torque, gearbox ratio, differential ratio, and transmission efficiency from basic data information; Extract the gear ratio corresponding to each gear from the gear ratio; Based on the gearbox ratio, universal characteristic speed, universal characteristic torque, differential ratio, and transmission efficiency corresponding to each gear, determine the corresponding vehicle speed and wheel torque relationship diagram, and obtain a set of vehicle speed and wheel torque relationship diagrams.

8. The method for rapidly calculating the optimal shift line of an engine transmission according to claim 7, characterized in that, In determining the corresponding vehicle speed and wheel-end torque relationship diagram based on the gearbox ratio, universal characteristic speed, universal characteristic torque, differential ratio, and transmission efficiency for each gear, and obtaining a set of vehicle speed and wheel torque relationship diagrams, the first determining unit is specifically used for: The relationship between vehicle speed and wheel torque is determined using the following formula, based on the gearbox ratio, universal characteristic speed, universal characteristic torque, differential ratio, and transmission efficiency for each gear. This results in a set of vehicle speed vs. wheel torque relationship graphs. ； ； in, Let n be the vehicle speed in the j-th gear, n be the universal characteristic speed, and T be the universal characteristic torque. Let i be the gear ratio of the j-th gearbox, i0 be the differential ratio, and η be the transmission efficiency.

9. A terminal, characterized in that, The system includes a processor, an input device, an output device, and a memory, which are interconnected. The memory stores a computer program, which includes program instructions. The processor is configured to invoke the program instructions to execute the rapid calculation method for the optimal shift line of an engine transmission as described in any one of claims 1-5.

10. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a computer program, the computer program including program instructions, which, when executed by a processor, cause the processor to perform the rapid calculation method for the optimal shift line of the engine transmission as described in any one of claims 1-5.

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