Methods, devices, equipment and storage media for limiting the speed of manual transmission electric vehicles

Abstract

This application discloses a method, device, equipment, and storage medium for limiting the speed of a manual transmission electric vehicle, relating to the field of vehicle control technology. The method includes: obtaining a target speed limit based on vehicle operating parameters; determining a target torque limit based on the target speed limit and engine parameters; and determining the output torque under the current state based on the target torque limit and real-time torque demand. This application calculates and sets the maximum speed limit under different operating conditions based on operating parameters such as the vehicle's actual gear position, fault level, and instrument setting request information. By splitting the speed limit torque into proportional and integral torque components for separate calculation, it can dynamically adjust the motor torque output based on the difference between the target speed limit and the actual speed, as well as parameters such as the gearbox gear position and motor speed, reducing torque abrupt changes and improving driving smoothness.

Description

Technical Field

[0001] This application relates to the field of vehicle control technology, and in particular to a method, device, equipment and storage medium for limiting the speed of a manual transmission electric vehicle. Background Technology

[0002] With the rapid development of global industrialization and urbanization, governments and research institutions worldwide are actively seeking alternative energy sources and clean technologies to achieve sustainable development goals. Electric vehicles, as a new energy mode of transportation, are gradually becoming an important option for addressing energy and environmental challenges due to their clean and efficient characteristics.

[0003] In specific applications, such as driving school vehicles, the use of traditional gasoline-powered vehicles has revealed more limitations. Driving school vehicles typically operate at idle or low speeds, which not only leads to high fuel consumption but also causes serious environmental pollution from exhaust emissions. Furthermore, frequent start-stop operations and low-speed driving cause greater wear and tear on the vehicles, increasing maintenance costs. With increasing societal emphasis on environmental protection and energy efficiency, and the continuous maturation of electric vehicle technology, the market demand for more environmentally friendly and economical driving school vehicles is growing.

[0004] Therefore, how to design a speed limit control logic that can adapt to manual transmission electric vehicles to solve the problem of insufficient power or sudden torque changes that may occur when such vehicles are in motion, thereby improving driving stability and ride comfort, has become a technical problem to be solved in this field. Summary of the Invention

[0005] The main objective of this application is to provide a method, device, equipment, and storage medium for limiting the speed of a manual transmission electric vehicle, aiming to solve the technical problem of how to design a speed limiting control logic that can adapt to manual transmission electric vehicles to address the potential power shortage or torque surges that may occur when such vehicles are in motion, thereby improving driving stability and ride comfort.

[0006] To achieve the above objectives, this application provides a method for limiting the speed of a manual transmission electric vehicle, the method comprising the following steps:

[0007] The target speed limit is determined based on the vehicle's operating parameters;

[0008] The target limiting torque is determined based on the target vehicle speed limit and engine parameters;

[0009] Determine the output torque under the current condition based on the target torque limit and the real-time torque requirement.

[0010] Optionally, obtaining the target speed limit based on vehicle operating parameters includes:

[0011] Based on the vehicle operating parameters, determine the current gear and fault level;

[0012] Based on the gear position, determine the gear-limited vehicle speed;

[0013] Based on the fault level, determine the fault level-limited vehicle speed;

[0014] The target speed limit is obtained based on the speed limit of the gear and the speed limit of the fault level.

[0015] Optionally, determining the target limiting torque based on the target vehicle speed and engine parameters includes:

[0016] The speed difference is determined based on the real-time vehicle speed and the target speed limit.

[0017] Calculate the proportional portion of the torque based on the vehicle speed difference and engine parameters;

[0018] Calculate the integral torque based on the engine parameters;

[0019] The target limiting torque is determined based on the proportional torque and the integral torque.

[0020] Optionally, after determining the speed difference based on the real-time vehicle speed and the target speed limit, the method further includes:

[0021] If the real-time vehicle speed is greater than the target speed limit, the calculation of the proportional portion of the torque will be terminated.

[0022] If the speed difference is greater than a preset speed difference threshold, the calculation of the integral torque is terminated.

[0023] Optionally, the step of calculating the proportional portion of the torque based on the vehicle speed difference and engine parameters includes:

[0024] Based on the engine parameters, determine the real-time vehicle speed and motor speed;

[0025] The first proportional coefficient is determined based on the real-time vehicle speed and motor speed;

[0026] Determine the second proportional coefficient based on the real-time gear position;

[0027] The proportional torque is calculated based on the speed difference, the first proportional coefficient, and the second proportional coefficient.

[0028] Optionally, obtaining the integral portion of the torque based on engine parameters includes:

[0029] Determine the change in motor speed based on engine parameters;

[0030] The initial integral torque is obtained based on the vehicle speed difference and the change in motor speed.

[0031] Based on the integral torque limit map, determine the limit conditions for the initial integral torque.

[0032] The integral torque is obtained by correcting the integral portion torque according to the limit conditions.

[0033] Optionally, determining the output torque under the current state based on the target limiting torque and the real-time torque requirement includes:

[0034] Based on the real-time torque demand, determine the driver's requested torque and the energy recovery torque;

[0035] The output torque in the current state is determined based on the target limiting torque, the driver's requested torque, and the energy recovery torque.

[0036] Furthermore, to achieve the above objectives, this application also provides a speed limiting device for a manual transmission electric vehicle, the speed limiting device for the manual transmission electric vehicle comprising:

[0037] The vehicle speed limit determination module is used to determine the target vehicle speed limit based on vehicle operating parameters;

[0038] The torque limiting determination module is used to determine the target limiting torque based on the target vehicle speed and engine parameters;

[0039] The output torque determination module is used to determine the output torque under the current state based on the target limit torque and the real-time torque requirement.

[0040] In addition, to achieve the above objectives, this application also provides a speed limiting device for a manual transmission electric vehicle, the device comprising: a memory, a processor, and a speed limiting program for a manual transmission electric vehicle stored in the memory and executable on the processor, the speed limiting program for the manual transmission electric vehicle being configured to implement the steps of the speed limiting method for a manual transmission electric vehicle as described above.

[0041] In addition, to achieve the above objectives, this application also provides a storage medium storing a speed limiting program for a manual transmission electric vehicle, wherein when the speed limiting program for the manual transmission electric vehicle is executed by a processor, the program implements the steps of the speed limiting method for the manual transmission electric vehicle described above.

[0042] This application obtains the target speed limit based on vehicle operating parameters; determines the target torque limit based on the target speed limit and engine parameters; and determines the output torque under the current state based on the target torque limit and real-time torque requirements.

[0043] In summary, this application calculates and sets the maximum vehicle speed limit under different operating conditions using operating parameters such as the vehicle's actual gear position, fault level, and instrument setting request information. By splitting the limiting torque into proportional and integral torque components for separate calculation, the motor torque output can be dynamically adjusted based on the difference between the target limiting speed and the actual vehicle speed, as well as parameters such as the transmission gear and motor speed, thereby reducing torque abrupt changes and improving driving smoothness. Attached Figure Description

[0044] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0045] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0046] Figure 1 This is a flowchart illustrating the first embodiment of the method for limiting the speed of a manual transmission electric vehicle according to this application;

[0047] Figure 2 This is a flowchart illustrating the second embodiment of the method for limiting the speed of a manual transmission electric vehicle according to this application;

[0048] Figure 3 This is a schematic diagram of the functional modules of the speed limiting device for a manual transmission electric vehicle in this application.

[0049] Figure 4 It is a structural diagram of the terminal device of the hardware operating environment involved in the embodiment of the present application.

[0050] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0051] It should be understood that the specific embodiments described herein are merely used to explain the technical solutions of the present application and are not intended to limit the present application.

[0052] In order to better understand the technical solution of the present application, a detailed description will be given below in conjunction with the accompanying drawings and specific implementation methods.

[0053] It should be noted that the executing entity in this embodiment can be a computing service device with data processing, network communication, and program execution functions, such as a tablet computer, personal computer, or mobile phone, or an electronic device capable of performing the above functions, such as a speed limiting device for a manual transmission electric vehicle. The following description uses a speed limiting device for a manual transmission electric vehicle as an example to illustrate this embodiment and the subsequent embodiments.

[0054] This application provides a method for limiting the speed of a manual transmission electric vehicle, referring to... Figure 1 , Figure 1 This is a flowchart of the first embodiment of the present application.

[0055] In this embodiment, the method for limiting the speed of a manual transmission electric vehicle includes:

[0056] Step S10: Obtain the target speed limit based on the vehicle operating parameters.

[0057] It should be understood that although most electric vehicles do not require a gearbox due to the characteristics of their electric motors, most driving school vehicles currently use gasoline-powered cars. Due to the specific operating conditions of driving school vehicles, which involve frequent idling or low-speed operation, gasoline-powered cars consume a lot of fuel and are not very fuel-efficient under these conditions. With the popularization of electric vehicle technology, some manufacturers have added a manual transmission experience to traditional electric vehicles, giving rise to manual transmission electric vehicles for driving schools. Therefore, manual transmission electric vehicles are not products that do not conform to reality, but rather specialized products designed for this application scenario. Thus, the applicability of this method needs to be understood in conjunction with this application scenario.

[0058] It should be noted that the vehicle operating parameters here specifically include the vehicle's current gear and the vehicle fault level determined by the VCU analysis. The vehicle's gear directly determines the maximum speed at that gear. When the VCU identifies a fault based on the fault management module, it can further limit the speed according to the current fault level to obtain the target speed limit.

[0059] Understandably, when the VCU identifies no faults, the target speed limit is set according to the vehicle's gear settings, i.e., the maximum speed is set for gears 1-5 and R respectively. When there is a fault, the speed limit corresponding to the fault level is used. In addition, the speed limit can also be set in response to speed limit commands sent by the instrument panel, which can be manually set by the driver.

[0060] In one embodiment, obtaining the target speed limit based on vehicle operating parameters includes: determining the current gear and fault level based on the vehicle operating parameters; determining the gear speed limit based on the gear; determining the fault level speed limit based on the fault level; and obtaining the target speed limit based on the gear speed limit and the fault level speed limit.

[0061] Step S20: Determine the target limiting torque based on the target limiting vehicle speed and engine parameters.

[0062] It should be noted that, in order to avoid poor driving experience caused by insufficient power or sudden torque changes, the calculation process for obtaining the target limiting torque is divided into two parts: proportional torque and integral torque. As the name suggests, proportional torque introduces multiple proportional coefficients related to gear, vehicle speed, and engine parameters, which can finely adjust the torque output under different gear and vehicle speed conditions. The calculation of integral torque is based on the cumulative effect of vehicle speed difference and motor speed change, reflecting the accumulation of speed error over a period of time, which helps to reduce the steady-state error of the system and improve the stability of vehicle speed control.

[0063] Understandably, the calculation of both the integral and proportional torque components requires certain conditions to be met before execution; otherwise, the calculation must be aborted or the result set to zero. For example, if the actual vehicle speed exceeds the target speed limit, the vehicle does not need to accelerate further, meaning the proportional torque should be set to zero. Furthermore, when the difference between the target speed and the actual speed is less than a preset threshold, the integral torque can be calculated; conversely, when the two are too close, the integral torque is set to zero.

[0064] In one embodiment, if the real-time vehicle speed is greater than the target speed limit, the calculation of the proportional portion of the torque is terminated; if the speed difference is greater than a preset speed difference threshold, the calculation of the integral portion of the torque is terminated.

[0065] Step S30: Determine the output torque under the current state based on the target limit torque and the real-time torque requirement.

[0066] It's important to note that real-time torque demand refers to the total torque required by a vehicle at a specific moment, based on its current state and the driver's intentions. This demand is dynamic, as it depends on multiple variables and conditions. These include, on one hand, the torque demand input by the driver through the accelerator pedal; and on the other hand, torque demands not related to driver intentions, such as torque limits imposed by anti-lock braking systems (ABS) or electronic stability programs (ESP) under specific conditions for vehicle safety; adjustments to torque output based on road conditions (such as slippery, snowy, or muddy conditions) to optimize vehicle traction and stability; and, in electric vehicles, adjustments to torque output based on remaining battery charge and energy efficiency to optimize range.

[0067] It is understood that the real-time torque demand in this embodiment specifically refers to the torque requested by the driver and the energy recovery torque. This is because the application scenario of this invention is driving school vehicles, which are mostly in idling condition. Therefore, energy recovery is more important than that of conventional vehicles, which helps to improve energy efficiency and reduce energy waste.

[0068] It should be understood that by comparing the target limiting torque, the driver-requested torque, and the energy recovery torque, and selecting the minimum torque value as the output, it can be ensured that the vehicle will not exceed the torque range for safe operation under any circumstances.

[0069] This application obtains the target speed limit based on vehicle operating parameters; determines the target torque limit based on the target speed limit and engine parameters; and determines the output torque under the current state based on the target torque limit and real-time torque requirements.

[0070] In summary, this application calculates and sets the maximum vehicle speed limit under different operating conditions using operating parameters such as the vehicle's actual gear position, fault level, and instrument setting request information. By splitting the limiting torque into proportional and integral torque components for separate calculation, the motor torque output can be dynamically adjusted based on the difference between the target limiting speed and the actual vehicle speed, as well as parameters such as the transmission gear and motor speed, thereby reducing torque abrupt changes and improving driving smoothness.

[0071] Reference Figure 2 , Figure 2 This is a flowchart illustrating the second embodiment of the method for limiting the speed of a manual transmission electric vehicle according to this application. Based on the first embodiment described above, a second embodiment of the method for limiting the speed of a manual transmission electric vehicle according to this application is proposed.

[0072] In this embodiment, step S20 includes:

[0073] Step S201: Determine the speed difference based on the real-time vehicle speed and the target speed limit.

[0074] Understandably, the real-time vehicle speed is compared with the target speed limit. If the real-time vehicle speed is less than the target speed limit, the difference between the two is calculated. Based on the speed difference, the control system can make corresponding decisions, such as accelerating or decelerating, to reduce the difference and bring the vehicle speed close to or to the target speed limit.

[0075] Step S202: Calculate the proportional torque based on the vehicle speed difference and engine parameters.

[0076] In one embodiment, calculating the proportional portion of the torque based on the vehicle speed difference and engine parameters includes: determining the real-time vehicle speed and motor speed based on the engine parameters; determining a first proportional coefficient based on the real-time vehicle speed and motor speed; determining a second proportional coefficient based on the real-time gear; and calculating the proportional portion of the torque based on the vehicle speed difference, the first proportional coefficient, and the second proportional coefficient.

[0077] It is understandable that when the clutch of a manual transmission electric vehicle is fully engaged, the relationship between vehicle speed and motor speed is: motor speed = vehicle speed * final reduction ratio * current gear ratio of the transmission / (tire diameter * π). Here, different coefficients are set for motor speed and vehicle speed according to the gear. The first proportional coefficient A for each gear is = final reduction ratio * current gear ratio of the transmission / (tire diameter * π); the second proportional coefficient B is set according to the different transmission ratios of the gears, so that the vehicle can approach the limited maximum speed in different gears and make the torque change smoothly, avoiding sudden changes in torque that cause jerking.

[0078] Taking the table below as an example, the second proportional coefficient B is set as follows (where 6 represents reverse gear):

[0079]

[0080] It should be understood that the formula for calculating the torque ratio limit is as follows:

[0081] T1=K*(A*∆V) 2 / ((A*∆V) 2 +B))

[0082] Among them, K is related to the specific vehicle drive motor model and belongs to the adaptability parameter, A is the first proportional coefficient, B is the second proportional coefficient, and ∆V is the vehicle speed difference. Different smooth curves are calculated based on different coefficients K, A, and B, so that the vehicle can approach the limited maximum speed in different gears and make the torque change smoothly. When the actual vehicle speed approaches the target speed limit, the proportional part torque T1 approaches 0, avoiding sudden torque changes that cause jerking.

[0083] Step S203: Calculate the integral torque based on the engine parameters.

[0084] In one embodiment, obtaining the integral torque based on engine parameters includes: determining the change in motor speed based on engine parameters; obtaining an initial integral torque based on the vehicle speed difference and the change in motor speed; determining a limit condition for the initial integral torque based on an integral torque limit map; and correcting the integral torque based on the limit condition to obtain the integral torque.

[0085] Understandably, the calculation and correction process for the integral torque involves the following key steps and parameters: First, the change in motor speed needs to be determined based on engine parameters. Using the vehicle speed difference (the difference between the target speed limit and the actual vehicle speed) and the change in motor speed, the initial integral torque is calculated. Then, based on the current gear, the limit conditions for the integral torque are determined from the integral torque limit map (a pre-defined table or mapping relationship). These limit conditions prevent the integral torque from becoming too large, thus avoiding excessive torque shock to the vehicle. Specifically, the integral interruption condition is set so that when the calculated integral value is less than a pre-defined calculation threshold, integral calculation continues; when it exceeds this threshold, the integral output is 0. This design ensures that the closer the current vehicle speed is to the target speed limit, the slower the integral update speed, thereby reducing the possibility of sudden torque changes. Based on the above limit conditions, the initial integral torque is corrected to obtain the final integral torque. This correction process ensures that the torque output meets dynamic response requirements while maintaining system stability and smoothness.

[0086] It should be understood that the output integral limit is set according to the gear, and the limit value is different for each gear. In addition, the integral limit can be extended to include both the upper limit and the lower limit of the integral, so that the output of the integral part can be controlled within the range formed by the upper and lower limits, without sudden increase or decrease in torque. By limiting the torque output of the integral part, the torque mutation caused by integral accumulation can be reduced, making the vehicle acceleration or deceleration process smoother and improving driving comfort.

[0087] Step S204: Determine the target limiting torque based on the proportional torque and the integral torque.

[0088] It should be noted that by summing the torque calculated by the proportional part and the torque calculated by the differential part under the vehicle speed limiting function, the motor limiting torque under the current speed limiting state can be obtained. The limiting torque is then filtered to reduce torque fluctuations caused by calculation errors, sensor noise, or model uncertainties.

[0089] This embodiment provides a method for limiting the speed of a manual transmission electric vehicle. Firstly, by accurately calculating and dynamically adjusting the motor torque, this method achieves speed control of the vehicle under different gears and operating conditions. The scheme first determines the difference between the real-time vehicle speed and the target speed limit. Then, based on the speed difference and engine parameters, it calculates the proportional torque, taking into account different gear ratios and setting different proportional coefficients. Next, through an integral control strategy, it calculates the integral torque and sets a limit on the integral torque based on the gear to avoid sudden torque fluctuations caused by integral accumulation. Finally, it sums the proportional and integral torques to obtain the target speed limit torque and performs filtering to reduce torque fluctuations, ensuring smooth vehicle operation under speed-limited conditions.

[0090] In summary, precise motor torque control enables accurate speed adjustment of manual transmission electric vehicles, ensuring smooth operation under different gears and conditions. The combination of proportional and integral control not only improves the accuracy of speed tracking and system stability but also significantly enhances driving comfort by limiting sudden changes in the integral torque.

[0091] Reference Figure 3 This application also provides a speed limiting device for a manual transmission electric vehicle, the speed limiting device for the manual transmission electric vehicle comprising:

[0092] The speed limit determination module 10 is used to obtain the target speed limit based on the vehicle's operating parameters;

[0093] The torque limiting determination module 20 is used to determine the target limiting torque based on the target vehicle speed and engine parameters;

[0094] The output torque determination module 30 is used to determine the output torque under the current state based on the target limit torque and the real-time torque requirement.

[0095] In one embodiment, the speed limit determination module 10 is further configured to determine the current gear and fault level based on the vehicle operating parameters; determine the gear-limited speed based on the gear; determine the fault-level-limited speed based on the fault level; and obtain the target speed limit based on the gear-limited speed and the fault-level-limited speed.

[0096] In one embodiment, the limiting torque determination module 20 is further configured to determine a speed difference based on the real-time vehicle speed and the target limiting vehicle speed; calculate the proportional torque based on the speed difference and engine parameters; calculate the integral torque based on the engine parameters; and determine the target limiting torque based on the proportional torque and the integral torque.

[0097] In one embodiment, the limiting torque determination module 20 is further configured to terminate the calculation of the proportional portion of the torque if the real-time vehicle speed is greater than the target limiting vehicle speed; and to terminate the calculation of the integral portion of the torque if the vehicle speed difference is greater than a preset vehicle speed difference threshold.

[0098] In one embodiment, the limiting torque determination module 20 is further configured to determine the real-time vehicle speed and motor speed based on engine parameters; determine a first proportional coefficient based on the real-time vehicle speed and motor speed; determine a second proportional coefficient based on the real-time gear; and calculate the proportional portion of the torque based on the vehicle speed difference, the first proportional coefficient, and the second proportional coefficient.

[0099] In one embodiment, the limiting torque determination module 20 is further configured to: determine the change value of motor speed based on engine parameters; obtain the initial integral torque based on the vehicle speed difference and the change value of motor speed; determine the limit condition of the initial integral torque based on the integral torque limit map; and correct the integral torque based on the limit condition to obtain the integral torque.

[0100] In one embodiment, the output torque determination module 30 is further configured to determine the driver-requested torque and energy recovery torque based on the real-time torque demand; and to determine the output torque in the current state based on the target limiting torque, the driver-requested torque, and the energy recovery torque.

[0101] This application also provides a speed limiting device for a manual transmission electric vehicle. The device includes: at least one processor; and a memory communicatively connected to the at least one processor; wherein the memory stores instructions executable by the at least one processor, which are executed by the at least one processor to enable the at least one processor to perform the speed limiting method for the manual transmission electric vehicle in the first embodiment described above.

[0102] The following is for reference. Figure 4 The diagram illustrates a structural schematic suitable for implementing a speed limiting device for a manual transmission electric vehicle according to embodiments of this application. The speed limiting device for a manual transmission electric vehicle in embodiments of this application may include, but is not limited to, mobile terminals such as mobile phones, laptops, digital radio receivers, PDAs (Personal Digital Assistants), PADs (Portable Application Description), PMPs (Portable Media Players), in-vehicle terminals (e.g., in-vehicle navigation terminals), and fixed terminals such as digital TVs and desktop computers. Figure 4The speed limiting device for a manual transmission electric vehicle shown is merely an example and should not impose any limitations on the functionality and scope of use of the embodiments of this application.

[0103] like Figure 4 As shown, the speed limiting device for a manual transmission electric vehicle may include a processing unit 1001 (e.g., a central processing unit, a graphics processor, etc.), which can perform various appropriate actions and processes according to a program stored in a read-only memory (ROM) 1002 or a program loaded from a storage device 1003 into a random access memory (RAM) 1004. The RAM 1004 also stores various programs and data required for the operation of the speed limiting device for the manual transmission electric vehicle. The processing unit 1001, ROM 1002, and RAM 1004 are interconnected via a bus 1005. An input / output (I / O) interface 1006 is also connected to the bus. Typically, the following systems can be connected to I / O interface 1006: input devices 1007 including, for example, touchscreens, touchpads, keyboards, mice, image sensors, microphones, accelerometers, gyroscopes, etc.; output devices 1008 including, for example, liquid crystal displays (LCDs), speakers, vibrators, etc.; storage devices 1003 including, for example, magnetic tapes, hard disks, etc.; and communication devices 1009. Communication device 1009 allows the manual transmission electric vehicle speed limiting device to communicate wirelessly or wiredly with other devices to exchange data. Although the figure shows a manual transmission electric vehicle speed limiting device with various systems, it should be understood that it is not required to implement or possess all the systems shown. More or fewer systems may be implemented alternatively.

[0104] In particular, according to the embodiments disclosed in the present application, the processes described above with reference to the flowcharts can be implemented as computer software programs. For example, the embodiments disclosed in the present application include a computer program product comprising a computer program carried on a computer-readable medium, the computer program comprising program code for executing the method shown in the flowchart. In such an embodiment, the computer program can be downloaded and installed from a network via a communication device, or installed from a storage device 1003, or installed from a ROM 1002. When the computer program is executed by the processing device 1001, the above-mentioned functions defined in the method of the embodiment disclosed in the present application are executed.

[0105] The speed limiting device for manual transmission electric vehicles provided in this application employs the speed limiting method for manual transmission electric vehicles described in the above embodiments. It addresses the technical problem in the art of designing a speed limiting control logic adaptable to manual transmission electric vehicles to solve potential power shortages or torque surges during vehicle operation, thereby improving driving stability and ride comfort. Compared with the prior art, the beneficial effects of the speed limiting device for manual transmission electric vehicles provided in this application are the same as those of the speed limiting method for manual transmission electric vehicles provided in the above embodiments. Furthermore, other technical features of this speed limiting device are the same as those disclosed in the previous embodiment method, and will not be repeated here.

[0106] It should be understood that the various parts disclosed in this application can be implemented using hardware, software, firmware, or a combination thereof. In the description of the above embodiments, specific features, structures, materials, or characteristics can be combined in any suitable manner in one or more embodiments or examples.

[0107] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of this application. Therefore, the scope of protection of this application should be based on the scope of protection of the claims.

[0108] This application also provides a storage medium storing a speed limiting program for a manual transmission electric vehicle, wherein when the speed limiting program for the manual transmission electric vehicle is executed by a processor, it implements the steps of the speed limiting method for a manual transmission electric vehicle as described above.

[0109] The storage medium provided in this application may be, for example, a USB flash drive, but is not limited to electrical, magnetic, optical, electromagnetic, infrared, or semiconductor systems, systems or devices, or any combination thereof. More specific examples of storage media may include, but are not limited to: an electrical connection with one or more wires, a portable computer disk, a hard disk, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fiber, portable compact disk read-only memory (CD-ROM), optical storage device, magnetic storage device, or any suitable combination thereof. In this embodiment, the storage medium may be any tangible medium that contains or stores a program that can be used by or in conjunction with an instruction execution system, system or device. The program code contained on the storage medium may be transmitted using any appropriate medium, including but not limited to: wires, optical cables, RF (Radio Frequency), etc., or any suitable combination thereof.

[0110] The aforementioned storage medium may be included in the speed limiting device for manual transmission electric vehicles; or it may exist independently and not be installed in the speed limiting device for manual transmission electric vehicles.

[0111] The aforementioned computer-readable storage medium carries one or more programs that, when executed by the manual transmission electric vehicle speed limiting device, cause the manual transmission electric vehicle speed limiting device to: obtain a target speed limit based on vehicle operating parameters; determine a target torque limit based on the target speed limit and engine parameters; and determine the output torque in the current state based on the target torque limit and real-time torque requirements.

[0112] Computer program code for performing the operations of the present application 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 stand-alone 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 via 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).

[0113] The flow charts and block diagrams in the accompanying drawings illustrate the possible architecture, functions and operations of the systems, methods and computer program products according to various embodiments of the present application. In this regard, each box in the flow chart or block diagram can represent a module, program segment or a part of code, and the module, program segment or a part of code contains one or more executable instructions for realizing 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 than that marked in the accompanying drawings. For example, two boxes represented in succession 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 flow chart, and the combination of the boxes in the block diagram and / or flow chart can be implemented by a dedicated hardware-based system that performs the specified function or operation, or can be implemented by a combination of dedicated hardware and computer instructions.

[0114] The modules described in the embodiments of the present application may be implemented in software or hardware, wherein the name of a module does not necessarily limit the unit itself.

[0115] The storage medium provided in this application is a computer-readable storage medium that stores computer-readable program instructions (i.e., a computer program) for executing the aforementioned speed limiting method for manual transmission electric vehicles. This solves the technical problem of how to design a speed limiting control logic adaptable to manual transmission electric vehicles to address potential power shortages or torque surges during vehicle operation, thereby improving driving stability and ride comfort. Compared to the prior art, the beneficial effects of the computer-readable storage medium provided in this application are the same as those of the speed limiting method for manual transmission electric vehicles provided in the above embodiments, and will not be repeated here.

[0116] The above description is only part of the embodiments of the present application and does not limit the patent scope of the present application. All equivalent structural transformations made by using the contents of the present application specification and drawings under the technical concept of the present application, or direct / indirect application in other related technical fields are included in the patent protection scope of the present application.

Claims

1. A method for limiting the speed of a manual transmission electric vehicle, characterized in that, The method for limiting the speed of a manual transmission electric vehicle includes: Determine the current gear and fault level based on the vehicle's operating parameters; Based on the gear position, determine the gear-limited vehicle speed; Based on the fault level, determine the fault level-limited vehicle speed; The target speed limit is obtained based on the speed limit of the gear and the speed limit of the fault level. The speed difference is determined based on the real-time vehicle speed and the target speed limit. Calculate the proportional portion of the torque based on the vehicle speed difference and engine parameters; Calculate the integral torque based on the engine parameters; The target limiting torque is determined based on the proportional portion torque and the integral portion torque. Determine the output torque under the current condition based on the target torque limit and the real-time torque requirement.

2. The method for limiting the speed of a manual transmission electric vehicle according to claim 1, characterized in that, After determining the speed difference based on the real-time vehicle speed and the target speed limit, the method further includes: If the real-time vehicle speed is greater than the target speed limit, the calculation of the proportional portion of the torque will be terminated. If the speed difference is greater than a preset speed difference threshold, the calculation of the integral torque is terminated.

3. The method for limiting the speed of a manual transmission electric vehicle according to claim 1, characterized in that, The step of calculating the proportional portion of the torque based on the vehicle speed difference and engine parameters includes: Based on the engine parameters, determine the real-time vehicle speed and motor speed; The first proportional coefficient is determined based on the real-time vehicle speed and motor speed; Determine the second proportional coefficient based on the real-time gear position; The proportional torque is calculated based on the speed difference, the first proportional coefficient, and the second proportional coefficient.

4. The method for limiting the speed of a manual transmission electric vehicle according to claim 1, characterized in that, The process of obtaining the integral torque based on engine parameters includes: Determine the change in motor speed based on engine parameters; The initial integral torque is obtained based on the vehicle speed difference and the change in motor speed. Based on the integral torque limit map, determine the limit conditions for the initial integral torque. The integral torque is obtained by correcting the integral portion torque according to the limit conditions.

5. The method for limiting the speed of a manual transmission electric vehicle according to claim 1, characterized in that, The step of determining the output torque under the current state based on the target torque limit and the real-time torque requirement includes: Based on the real-time torque demand, determine the driver's requested torque and the energy recovery torque; The output torque in the current state is determined based on the target limiting torque, the driver's requested torque, and the energy recovery torque.

6. A speed limiting device for a manual transmission electric vehicle, characterized in that, The speed limiting device for the manual transmission electric vehicle includes: The vehicle speed limit determination module is used to determine the current gear and fault level based on vehicle operating parameters; determine the gear speed limit based on the gear; determine the fault level speed limit based on the fault level; and obtain the target speed limit based on the gear speed limit and the fault level speed limit. The torque limit determination module is used to determine the speed difference between the real-time vehicle speed and the target speed limit; calculate the proportional torque based on the speed difference and engine parameters; calculate the integral torque based on the engine parameters; and determine the target torque limit based on the proportional torque and the integral torque. The output torque determination module is used to determine the output torque under the current state based on the target limit torque and the real-time torque requirement.

7. A speed limiting device for a manual transmission electric vehicle, characterized in that, The manual transmission electric vehicle speed limiting device includes: a memory, a processor, and a manual transmission electric vehicle speed limiting program stored in the memory and executable on the processor, wherein the manual transmission electric vehicle speed limiting program is configured to implement the steps of the manual transmission electric vehicle speed limiting method as described in any one of claims 1 to 5.

8. A storage medium, characterized in that, The storage medium stores a speed limiting program for a manual transmission electric vehicle, which, when executed by a processor, implements the steps of the speed limiting method for a manual transmission electric vehicle as described in any one of claims 1 to 5.

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