Vehicle gear control method, device, equipment and medium

Abstract

The present disclosure relates to a vehicle gear control method, device, equipment and medium. The vehicle gear control method comprises: acquiring the motion state information of the vehicle in real time; when the vehicle is in a target uphill working condition, calculating the current ground adhesion rate based on the motion state information; judging whether the vehicle is in a target wet and slippery road surface based on the ground adhesion rate; if the vehicle is in the target wet and slippery road surface and there is a demand for gear down, performing gear control based on the motion state information. According to the embodiment of the present disclosure, the vehicle out-of-control accident caused by automatic gear down on a wet and slippery uphill road surface can be effectively prevented, and the active safety level is greatly improved.

Description

Vehicle gear control methods, devices, equipment and media Technical Field

[0001] This disclosure relates to the field of automatic transmission technology, and in particular to a vehicle gear control method, device, equipment and medium. Background Technology

[0002] Modern automatic transmission control systems typically integrate multiple intelligent shift logics, such as an "altitude-compensated" mode and a "mountain mode" based on slope recognition. The core of these strategies is to actively downshift to increase engine speed and output torque when insufficient vehicle driving force is detected, thereby meeting the power requirements for climbing.

[0003] However, in adverse weather conditions such as rain and snow, the road surface becomes slippery and the ground adhesion rate decreases sharply. If downshifting is performed at this time, the torque of the drive wheel at the wheel end will increase sharply and the torque will fluctuate violently. This may break the balance between the drive wheel and the ground, causing the wheel to slip instantly and the vehicle to roll or skid when going uphill. In severe cases of slippage, the engine may even stall because the torque converter does not open in time, posing a major safety hazard to the driver and the vehicle. Summary of the Invention

[0004] To address the aforementioned technical problems, this disclosure provides a vehicle gear control method, device, equipment, and medium.

[0005] In a first aspect, this disclosure provides a vehicle gear control method, including:

[0006] Real-time acquisition of vehicle motion status information;

[0007] When the vehicle is in the target uphill condition, the current ground adhesion rate is calculated based on the motion state information;

[0008] Determine whether the vehicle is on the target slippery road surface based on the ground adhesion rate;

[0009] If the vehicle is on the target slippery road surface and there is a need to downshift, gear control is performed based on the motion state information.

[0010] Secondly, this disclosure provides a vehicle gear control device, including:

[0011] The data acquisition module is used to acquire the vehicle's motion status information in real time;

[0012] The data calculation module is used to calculate the current ground adhesion rate based on the motion state information when the vehicle is in the target uphill condition;

[0013] The environmental judgment module is used to determine whether the vehicle is on the target slippery road surface based on the ground adhesion rate;

[0014] The gear control module is used to control the gear position based on the motion state information when the vehicle is on the target slippery road surface and there is a need to downshift.

[0015] Thirdly, this disclosure provides a vehicle gear control device, including:

[0016] processor;

[0017] Memory, used to store executable instructions;

[0018] The processor is used to read executable instructions from memory and execute the executable instructions to implement the vehicle gear control method of the first aspect.

[0019] Fourthly, this disclosure provides a computer-readable storage medium storing a computer program that, when executed by a processor, causes the processor to implement the vehicle gear control method of the first aspect.

[0020] The technical solution provided in this disclosure has the following advantages compared with the prior art:

[0021] The vehicle gear control method, apparatus, device, and medium disclosed in this embodiment can acquire vehicle motion state information in real time. Then, when the vehicle is in a target uphill condition, the current ground adhesion rate is calculated based on the motion state information. Next, based on the ground adhesion rate, it is determined whether the vehicle is on a target slippery road surface. Finally, if the vehicle is on the target slippery road surface and there is a need to downshift, gear control is performed based on the motion state information. Therefore, by calculating the current ground adhesion rate based on the vehicle's motion state information and determining, based on the ground adhesion rate, that the vehicle is on the target slippery road surface and there is a need to downshift, gear control is performed, effectively preventing vehicle loss of control accidents caused by automatic downshifting on slippery uphill roads and greatly improving active safety levels. Attached Figure Description

[0022] The above and other features, advantages, and aspects of the embodiments of this disclosure will become more apparent from the accompanying drawings and the following detailed description. Throughout the drawings, the same or similar reference numerals denote the same or similar elements. It should be understood that the drawings are schematic, and the originals and elements are not necessarily drawn to scale.

[0023] Figure 1 is a schematic flowchart of a vehicle gear control method provided in an embodiment of this disclosure;

[0024] Figure 2 is a flowchart illustrating another vehicle gear control method provided in an embodiment of this disclosure;

[0025] Figure 3 is a schematic diagram of a vehicle gear control device provided in an embodiment of this disclosure;

[0026] Figure 4 is a structural schematic diagram of a vehicle gear control device provided in an embodiment of this disclosure. Detailed Implementation

[0027] Embodiments of this disclosure will now be described in more detail with reference to the accompanying drawings. While some embodiments of this disclosure are shown in the drawings, it should be understood that this disclosure can be implemented in various forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of this disclosure. It should be understood that the accompanying drawings and embodiments of this disclosure are for illustrative purposes only and are not intended to limit the scope of protection of this disclosure.

[0028] It should be understood that the steps described in the method embodiments of this disclosure may be performed in different orders and / or in parallel. Furthermore, the method embodiments may include additional steps and / or omit the steps shown. The scope of this disclosure is not limited in this respect.

[0029] The term "comprising" and its variations as used herein are open-ended inclusions, meaning "including but not limited to". The term "based on" means "at least partially based on". The term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one additional embodiment"; the term "some embodiments" means "at least some embodiments". Definitions of other terms will be given in the description below.

[0030] It should be noted that the concepts of "first" and "second" mentioned in this disclosure are used only to distinguish different devices, modules or units, and are not used to limit the order of functions performed by these devices, modules or units or their interdependencies.

[0031] It should be noted that the terms "a" and "a plurality of" used in this disclosure are illustrative rather than restrictive, and those skilled in the art should understand that, unless otherwise expressly indicated in the context, they should be understood as "one or more".

[0032] The names of messages or information exchanged between multiple devices in the embodiments of this disclosure are for illustrative purposes only and are not intended to limit the scope of such messages or information.

[0033] To address the aforementioned problems, this disclosure provides a vehicle gear control method, apparatus, device, and medium. The vehicle gear control method provided by this disclosure will be described in detail below with reference to FIG1.

[0034] Figure 1 shows a schematic flowchart of a vehicle gear control method provided in an embodiment of this disclosure.

[0035] In this embodiment of the disclosure, the vehicle gear control method can be executed by an electronic device. The electronic device may include, but is not limited to, devices such as an in-vehicle terminal, a computer, or a tablet computer.

[0036] As shown in Figure 1, the vehicle gear control method may include the following steps.

[0037] S110: Real-time acquisition of vehicle motion status information.

[0038] In this embodiment of the disclosure, the electronic device can acquire the vehicle's motion status information in real time.

[0039] Optionally, the motion state information can be various state information collected to characterize the vehicle during its movement. This motion state information may include road gradient, current gear, target gear, shift process, shift mode, drive wheel speed, and vehicle speed.

[0040] Specifically, electronic devices can acquire information about the vehicle's motion status. For example, electronic devices can acquire information such as road gradient, current gear, target gear, shifting process, and shifting mode (e.g., economy mode, mountain mode, plateau mode) of the vehicle in motion through a telematics control unit (TCU), and acquire information such as the wheel speed of the drive wheels and the vehicle speed through an electronic stability program (ESP).

[0041] S120. When the vehicle is in the target uphill condition, calculate the current ground adhesion rate based on the motion state information.

[0042] In this embodiment of the disclosure, when the vehicle is in a target uphill condition, the electronic device can calculate the current ground adhesion rate based on the motion state information.

[0043] Optionally, the target uphill condition can be the situation where the vehicle enters the ramp and goes uphill.

[0044] Optionally, the current ground adhesion rate refers to the minimum coefficient of adhesion required for a vehicle to fully utilize its driving force while traveling in a straight line. The adhesion rate increases during acceleration, uphill driving, or high-speed driving. When the adhesion rate of the drive wheels exceeds the ground adhesion coefficient, slippage will occur. The adhesion coefficient is defined as the ratio of the maximum limit value of the tangential reaction force of the ground on the tire (adhesion force) to the normal reaction force of the drive wheels.

[0045] Specifically, when a vehicle enters a slope, i.e. when the vehicle is in the target uphill condition, the electronic equipment can calculate the current ground adhesion rate based on the motion status information.

[0046] S130. Determine whether the vehicle is on the target slippery road surface based on the ground adhesion rate.

[0047] In this embodiment of the disclosure, the electronic device can determine whether the vehicle is on a target slippery road surface based on the ground adhesion rate.

[0048] Optionally, the target slippery road surface can be a road surface condition used to characterize the road surface where the friction is reduced due to rain, water accumulation or road surface material problems, making it easy for vehicles to skid or fishtail when driving.

[0049] Specifically, after calculating the ground adhesion rate, the electronic device can determine whether the vehicle is on a target slippery road surface, such as in rainy, snowy, or foggy weather conditions that reduce road surface friction.

[0050] S140. If the vehicle is on the target slippery road surface and there is a need to downshift, gear control is performed based on the motion state information.

[0051] In this embodiment of the disclosure, if the vehicle is on the target slippery road surface and there is a need to downshift, the electronic device can perform gear control based on the motion state information.

[0052] Optionally, downshifting can be defined as the need to actively downshift to improve vehicle power when insufficient power is encountered during driving. For example, calibration engineers can manually control whether the downshifting function is enabled in a specific shift mode using a flag. It is recommended to enable it in Eco, Mountain, and High Altitude modes, as the chance of accidental triggering increases in other modes.

[0053] Specifically, after the electronic device makes a judgment, if the vehicle is on the target slippery road surface and there is a need to downshift, it can perform gear control based on the motion state information, such as downshifting or canceling downshifting.

[0054] Therefore, in this embodiment, the vehicle's motion state information can be acquired in real time. Then, when the vehicle is on a target uphill slope, the current ground adhesion rate is calculated based on the motion state information. Next, based on the ground adhesion rate, it is determined whether the vehicle is on a target slippery road surface. Finally, if the vehicle is on the target slippery road surface and there is a need to downshift, gear control is performed based on the motion state information. Thus, by calculating the current ground adhesion rate based on the vehicle's motion state information and determining, based on this ground adhesion rate, that the vehicle is on the target slippery road surface and there is a need to downshift, gear control is performed, effectively preventing vehicle loss of control accidents caused by automatic downshifting on slippery uphill roads and greatly improving active safety levels.

[0055] Optionally, the vehicle gear control method may further include: determining whether the vehicle is in the target uphill condition based on the road slope.

[0056] In this embodiment of the disclosure, the electronic device can determine whether the vehicle is in the target uphill condition based on the road slope.

[0057] Specifically, the electronic device can acquire road gradient in real time, such as through a gradient sensor or by calculating based on vehicle acceleration and wheel speed. When the road gradient exceeds a certain threshold (e.g., 8%) and lasts for a certain period (e.g., 3 seconds), it indicates that the electronic device can determine that the vehicle is traveling on a slope, i.e., in the target uphill condition. The TCU checks the current shift mode flag. This function is only activated in preset modes (e.g., Eco, Mountain, Plateau modes) to avoid excessive intervention in the driver's power requests in Sport mode.

[0058] Optionally, it can accurately and quickly identify uphill conditions, avoiding misjudgments (such as on flat roads or downhill slopes), and ensuring that the system only activates slippery road surface detection and gear control when necessary. This improves the system's response accuracy and reliability, reduces unnecessary intervention, and optimizes the driving experience.

[0059] Optionally, S120 may specifically include: calculating a target slip ratio based on the drive wheel speed and the vehicle speed; and when the target slip ratio is within a target linear change range, calculating the ground adhesion rate for the current cycle based on the slope of the target slip ratio.

[0060] In this embodiment of the disclosure, the electronic device can calculate the target slip ratio based on the wheel speed of the drive wheel and the vehicle speed.

[0061] Optionally, the target slip ratio is the proportion of slippage in wheel motion. The formula for calculating the target slip ratio S is:

[0062] .

[0063] Where S is the target slip ratio, Vr is the drive wheel speed, and Vf is the vehicle speed.

[0064] Specifically, after obtaining the drive wheel speed and vehicle speed, the electronic device can calculate the target slip ratio based on the drive wheel speed and vehicle speed.

[0065] Furthermore, when the target slip ratio is within the target linear change range, the electronic device can calculate the ground adhesion rate for the current cycle based on the slope of the target slip ratio.

[0066] Optionally, the target linear change range can be a pre-defined area, such as 0%-10%, 10%-15%, etc.

[0067] Specifically, after calculating the target slip ratio S, if the target slip ratio S is within the target linear change range (e.g., 0%-10%), the electronic device can calculate the ground adhesion rate of the current cycle based on the slope of the target slip ratio. At this time, the slope of the target slip ratio S can be approximately equal to the ground adhesion rate μ in the current state. For example, the corresponding formula can be μ≈k·(dS / dt), where k is a proportionality coefficient.

[0068] Furthermore, the electronic device can look up a one-dimensional compensation table based on the vehicle load (which can be estimated by the suspension height sensor or long-term longitudinal acceleration), and perform compensation based on the tire model or long-term slip ratio learning value. It uses a low-pass filtering algorithm to filter out high-frequency fluctuations in wheel speed caused by uneven road surface, ensuring that the estimated adhesion rate μ is a true reflection of the road surface material, rather than the interference of bumps.

[0069] Therefore, calculating the ground adhesion rate using the slope of the slip ratio is a simple and efficient method that can reflect changes in road surface adhesion in real time. This provides an accurate assessment of road conditions, offering a reliable data foundation for subsequent wet and slippery road surface assessments and enhancing the system's real-time performance and adaptability.

[0070] Optionally, S130 may specifically include: when the target slip ratio meets the calibration threshold, determining whether the ground adhesion rate of the current cycle is less than the target adhesion rate threshold; if the ground adhesion rate of the current cycle is less than the target adhesion rate threshold, then determining that the vehicle is on the target slippery road surface.

[0071] In this embodiment of the disclosure, when the target slip rate meets the calibration threshold, the electronic device can determine whether the ground adhesion rate of the current cycle is less than the target adhesion rate threshold.

[0072] Optionally, the calibration threshold can be a pre-set threshold. For example, the calibration threshold can be 5%, 10%, etc.

[0073] Optionally, the target adhesion rate threshold can be a preset threshold. For example, the target adhesion rate threshold can be 0.3, 0.4, etc., and there is no limitation here.

[0074] Specifically, after obtaining the target slip ratio, the electronic device determines whether the target slip ratio meets the calibration threshold (e.g., 5%). If it meets the calibration threshold, it determines whether the ground adhesion rate of the current cycle is less than the target adhesion rate threshold (e.g., 0.3, corresponding to wet asphalt or compacted snow).

[0075] Furthermore, if the ground adhesion rate in the current cycle is less than the target adhesion rate threshold, then the vehicle is determined to be on the target slippery road surface.

[0076] Specifically, if the electronic device determines that the ground adhesion rate of the current cycle is less than the target adhesion rate threshold, it indicates that the vehicle is on a low-adhesion wet and slippery road surface, and then determines that the vehicle is on the target wet and slippery road surface, which can be divided into multiple levels such as "slightly slippery", "slippery" and "extremely slippery".

[0077] Therefore, by combining the slip ratio threshold and the adhesion rate threshold, the accuracy and robustness of wet and slippery road surface recognition are improved, avoiding misjudgments caused by noise or temporary fluctuations. This ensures that gear control is triggered only on truly wet and slippery road surfaces, preventing unnecessary gear shift cancellations and balancing safety and driving performance.

[0078] Optionally, S140 may specifically include: determining the target process range to which the shifting process belongs; if the target process range is the first process range, canceling the downshifting operation and maintaining the current gear.

[0079] In this embodiment of the disclosure, the electronic device can determine the target process range to which the gear shifting process belongs.

[0080] Optionally, the target process range can be a range that characterizes the stage in which the gear shift operation is performed.

[0081] Optionally, after acquiring the shift process, the electronic device can determine the target process range to which the shift process belongs.

[0082] Furthermore, if the target process range is the first process range, cancel the downshift operation and maintain the current gear.

[0083] Optionally, the first process range can be a pre-defined range. For example, the first process range can be 0% to S1.

[0084] Specifically, when the electronic system determines the target range of the shift process, if the target range is within the first range (e.g., 0%~S1), the electronic system cancels the downshift operation and maintains the current gear. At this point, the transmission has not yet engaged in significant torque or clutch operation, minimizing the impact of canceling the downshift. Maintaining the current gear, while limiting power, ensures smooth torque to the drive wheels, avoiding the risk of loss of control. The TCU can simultaneously alert the driver via the instrument panel, "Slippery road, downshift delayed."

[0085] Therefore, eliminating downshifting at the initial stage of gear shifting effectively avoids the impact of sudden torque changes on vehicle stability, making it particularly suitable for uphill and slippery roads, reducing the risk of wheel slippage. This improves vehicle control and safety while maintaining driving comfort.

[0086] Optionally, S140 may specifically include: determining the target process range to which the shifting process belongs; if the target process range is a second process range, determining whether the rate of change of ground adhesion rate in the previous cycle is greater than the target rate of change; if the rate of change of ground adhesion rate in the previous cycle is greater than the target rate of change, canceling the downshift operation and maintaining the current gear; if the rate of change of ground adhesion rate in the previous cycle is less than or equal to the target rate of change, performing the downshift operation.

[0087] In this embodiment of the disclosure, the electronic device can determine the target process range to which the gear shifting process belongs.

[0088] Furthermore, if the target process range is the second process range, the electronic device can determine whether the rate of change of the ground adhesion rate in the previous cycle is greater than the target rate of change.

[0089] Optionally, the range of the second process can be a pre-defined range. For example, the range of the second process can be S1~S2.

[0090] Specifically, when determining the target process range of the shifting process, if the target process range is the second process range (such as S1~S2), the electronic device can determine the rate of change of the ground adhesion rate in the previous cycle. Does μ exceed the target rate of change? Specifically, the rate of change of ground adhesion rate in the previous period is calculated. The formula for μ is:

[0091] △ = .

[0092] Furthermore, if the rate of change of ground adhesion rate in the previous cycle is greater than the target rate of change, the downshift operation is canceled and the current gear is maintained.

[0093] Specifically, if the rate of change of ground adhesion rate in the previous cycle is greater than the target rate of change, the electronic device can cancel the downshift operation and maintain the current gear, indicating that the road adhesion conditions have not improved or are deteriorating. In this case, the downshift is canceled and the current gear is maintained.

[0094] Furthermore, if the rate of change of ground adhesion rate in the previous cycle is less than or equal to the target rate of change, a downshift operation is performed.

[0095] Specifically, if the rate of change of ground adhesion in the previous cycle is less than or equal to the target rate of change, the electronic equipment can downshift, indicating that the adhesion is rapidly improving (e.g., the vehicle is about to leave the ice and return to the asphalt road). Downshifting is permitted at this time because the expected increase in torque can be absorbed by the improving road surface.

[0096] Therefore, by introducing a rate of change in adhesion during gear shifts, the system can adapt to changes in road conditions. While ensuring safety, it meets downshifting needs as much as possible, balancing vehicle stability and power. This improves the system's intelligence and flexibility, avoiding overly conservative control strategies.

[0097] Optionally, S140 may specifically include: determining the target process range to which the shifting process belongs; if the target process range is a third process range, performing a downshift operation.

[0098] In this embodiment of the disclosure, the electronic device can determine the target process range to which the gear shifting process belongs.

[0099] Furthermore, if the target process range is a third process range, the electronic device can perform a downgrade operation.

[0100] Optionally, the range of the third process can be a pre-defined range. For example, the range of the third process can be S2~100%.

[0101] Specifically, when the target process range is within the third process range, the electronic system can perform a downshift. At this point, the shifting process is mostly complete, and the clutch pressure and engine torque have been significantly adjusted. A forced interruption during shifting would cause a secondary torque surge, the resulting shock potentially more dangerous than a completed downshift. This prevents sudden interruptions during shifting from causing a torque surge that could lead to vehicle slippage.

[0102] Therefore, allowing downshifting towards the end of the gear shift ensures a smooth shifting process and consistent driving, avoiding driving discomfort caused by frequent intervention. At the same time, since the shift is nearly complete, the risk is low, which optimizes the overall shifting strategy and improves driver satisfaction.

[0103] Figure 2 shows a flowchart of another vehicle gear control method provided in an embodiment of this disclosure.

[0104] As shown in Figure 2, the vehicle gear control method may include: the electronic device can acquire the vehicle's motion status information in real time, including road slope, current gear, target gear, shifting process, shifting mode, drive wheel speed, and vehicle speed, and determine whether the wet road surface gear maintenance flag is turned on in the current shifting mode; otherwise, normal downshifting is performed; if so, it determines whether the vehicle is in the target uphill condition and maintains it for a certain period of time based on the road slope; otherwise, normal downshifting is performed; if so, the ground adhesion rate of the current cycle is calculated.

[0105] Furthermore, the electronic device can calculate the target slip ratio based on the drive wheel speed and the vehicle speed; when the target slip ratio is within the target linear change range, it calculates the ground adhesion rate for the current cycle based on the slope of the target slip ratio, and determines whether the ground adhesion rate for the current cycle is less than the target adhesion rate threshold when the target slip ratio meets the calibration threshold. If the ground adhesion rate for the current cycle is less than the target adhesion rate threshold, it is determined that the vehicle is on the target slippery road surface.

[0106] Furthermore, if the vehicle is on the target slippery road surface and there is a need to downshift, the electronic device determines the target process range to which the shifting process belongs. If the target process range is the first process range (e.g., 0%~S1), the electronic device cancels the downshift operation and maintains the current gear; if the target process range is the second process range (e.g., S1~S2), the electronic device can determine the rate of change of ground adhesion in the previous cycle. If μ is greater than the target rate of change, and the rate of change of ground adhesion rate in the previous cycle is greater than the target rate of change, the electronic device can cancel the downshift operation and maintain the current gear. If the rate of change of ground adhesion rate in the previous cycle is less than or equal to the target rate of change, the downshift operation is performed. If the target process range is the third process range, the electronic device can perform the downshift operation.

[0107] Figure 3 shows a schematic diagram of the structure of a vehicle gear control device provided in an embodiment of this disclosure.

[0108] As shown in Figure 3, the vehicle gear control device 300 may include a data acquisition module 310, a data calculation module 320, an environment judgment module 330, and a gear control module 340.

[0109] The data acquisition module 310 can be used to acquire the vehicle's motion status information in real time.

[0110] The data calculation module 320 can be used to calculate the current ground adhesion rate based on the motion state information when the vehicle is in a target uphill condition.

[0111] The environment judgment module 330 can be used to determine whether a vehicle is on a target slippery road surface based on the ground adhesion rate.

[0112] The gear control module 340 can be used to control the gear based on the motion state information when the vehicle is on the target slippery road surface and there is a need to downshift.

[0113] Therefore, in this embodiment, the vehicle's motion state information can be acquired in real time. Then, when the vehicle is on a target uphill slope, the current ground adhesion rate is calculated based on the motion state information. Next, based on the ground adhesion rate, it is determined whether the vehicle is on a target slippery road surface. Finally, if the vehicle is on the target slippery road surface and there is a need to downshift, gear control is performed based on the motion state information. Thus, by calculating the current ground adhesion rate based on the vehicle's motion state information and determining, based on this ground adhesion rate, that the vehicle is on the target slippery road surface and there is a need to downshift, gear control is performed, effectively preventing vehicle loss of control accidents caused by automatic downshifting on slippery uphill roads and greatly improving active safety levels.

[0114] In some embodiments of this disclosure, the motion state information includes road slope, current gear, target gear, shifting process, shifting mode, drive wheel speed, and vehicle speed.

[0115] In some embodiments of this disclosure, the vehicle gear control device 300 may further include:

[0116] The working condition judgment module is used to determine whether the vehicle is in the target uphill working condition based on the road slope.

[0117] In some embodiments of this disclosure, the data calculation module 320 may specifically include:

[0118] The first calculation unit is used to calculate the target slip ratio based on the wheel speed of the drive wheel and the vehicle speed.

[0119] The second calculation unit is used to calculate the ground adhesion rate for the current cycle based on the slope of the target slip rate when the target slip rate is within the target linear change range.

[0120] In some embodiments of this disclosure, the environment determination module 330 may specifically include:

[0121] The first judgment unit is used to determine whether the ground adhesion rate of the current cycle is less than the target adhesion rate threshold when the target slip rate meets the calibration threshold.

[0122] The second determination unit is used to determine that the vehicle is on the target slippery road surface if the ground adhesion rate of the current cycle is less than the target adhesion rate threshold.

[0123] In some embodiments of this disclosure, the gear control module 340 may specifically include:

[0124] The third judgment unit is used to determine the target process range to which the shifting process belongs.

[0125] The first processing unit is configured to cancel the downshift operation and maintain the current gear if the target process range is the first process range.

[0126] In some embodiments of this disclosure, the gear control module 340 may specifically include:

[0127] The fourth judgment unit is used to determine the target process range to which the shifting process belongs.

[0128] The fifth judgment unit is used to determine whether the rate of change of ground adhesion rate in the previous period is greater than the target rate of change if the target process range is the second process range.

[0129] The second processing unit is used to cancel the downshifting operation and maintain the current gear if the rate of change of ground adhesion rate in the previous cycle is greater than the target rate of change.

[0130] The third processing unit is used to perform a downshift operation if the rate of change of ground adhesion rate in the previous cycle is less than or equal to the target rate of change.

[0131] In some embodiments of this disclosure, the gear control module 340 may specifically include:

[0132] The sixth judgment unit is used to determine the target process range to which the shifting process belongs.

[0133] The fourth processing unit is used to cancel the downshift operation and maintain the current gear if the target process range is the first process range.

[0134] It should be noted that the vehicle gear control device 300 shown in Figure 3 can execute the various steps in the method embodiments shown in Figures 1-2, and achieve the various processes and effects in the method embodiments shown in Figures 1-2, which will not be elaborated here.

[0135] Figure 4 shows a schematic diagram of the structure of a vehicle gear control device provided in an embodiment of this disclosure.

[0136] In some embodiments of this disclosure, the vehicle gear control device shown in FIG4 can be an electronic device. Specifically, the electronic device may include, but is not limited to, devices such as computer equipment, cloud servers, or cloud server clusters.

[0137] As shown in Figure 4, the vehicle gear control device may include a processor 401 and a memory 402 storing computer program instructions.

[0138] Specifically, the processor 401 may include a central processing unit (CPU), an application-specific integrated circuit (ASIC), or one or more integrated circuits that can be configured to implement the embodiments of this application.

[0139] Memory 402 may include a large-capacity storage for information or instructions. For example, and not limitingly, memory 402 may include a hard disk drive (HDD), a floppy disk drive, flash memory, optical disk, magneto-optical disk, magnetic tape, or a Universal Serial Bus (USB) drive, or a combination of two or more of these. Where appropriate, memory 402 may include removable or non-removable (or fixed) media. Where appropriate, memory 402 may be internal or external to the integrated gateway device. In a particular embodiment, memory 402 is a non-volatile solid-state memory. In a particular embodiment, memory 402 includes read-only memory (ROM). Where appropriate, the ROM may be a mask-programmed ROM, a programmable ROM (PROM), an erasable PROM (Electrically Programmable ROM, EPROM), an electrically erasable programmable PROM (EEPROM), an electrically alterable ROM (EAROM), or flash memory, or a combination of two or more of these.

[0140] The processor 401 reads and executes computer program instructions stored in the memory 402 to perform the steps of the vehicle gear control method provided in this embodiment of the present disclosure.

[0141] In one example, the vehicle gear control device may also include a transceiver 403 and a bus 404. As shown in Figure 4, the processor 401, memory 402, and transceiver 403 are connected via the bus 404 and communicate with each other.

[0142] Bus 404 includes hardware, software, or both. For example, and not limitingly, a bus may include an Accelerated Graphics Port (AGP) or other graphics bus, an Extended Industry Standard Architecture (EISA) bus, a Front Side Bus (FSB), a Hyper Transport (HT) interconnect, an Industrial Standard Architecture (ISA) bus, an Infinite Bandwidth Interconnect, a Low Pin Count (LPC) bus, a memory bus, a MicroChannel Architecture (MCA) bus, a Peripheral Component Interconnect (PCI) bus, a PCI-Express (PCI-X) bus, a Serial Advanced Technology Attachment (SATA) bus, a Video Electronics Standards Association Local Bus (VLB) bus, or other suitable buses, or a combination of two or more of these. Where appropriate, bus 404 may include one or more buses. Although specific buses are described and illustrated in the embodiments of this application, this application considers any suitable bus or interconnection.

[0143] This disclosure also provides a computer-readable storage medium that can store a computer program that, when executed by a processor, enables the processor to implement the vehicle gear control method provided in this disclosure.

[0144] The aforementioned storage medium may include, for example, a memory 402 containing computer program instructions, which can be executed by the processor 401 of the vehicle gear control device to complete the vehicle gear control method provided in this embodiment. Optionally, the storage medium may be a non-transitory computer-readable storage medium, such as a ROM, random access memory (RAM), compact disc-only memory (CD-ROM), magnetic tape, floppy disk, and optical data storage device.

[0145] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the term "comprising" is intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus.

[0146] The above description is merely a specific embodiment of this disclosure, enabling those skilled in the art to understand or implement it. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this disclosure. Therefore, this disclosure is not to be limited to the embodiments described herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A vehicle gear control method, characterized in that, include: Real-time acquisition of vehicle motion status information; When the vehicle is in the target uphill condition, the current ground adhesion rate is calculated based on the motion state information; Based on the ground adhesion rate, determine whether the vehicle is on the target slippery road surface; if the vehicle is on the target slippery road surface and there is a need to downshift, perform gear control based on the motion state information; wherein, the gear control based on the motion state information includes: determining the target process range to which the gear shifting process belongs, the target process range being a range representing the stage of the gear shifting operation, the first process range being 0%~S1, the second process range being S1~S2, and the third process range being S2~100%; if the target process range is the second process range, determine whether the rate of change of the ground adhesion rate in the previous cycle is greater than the target rate of change; if the rate of change of the ground adhesion rate in the previous cycle is greater than the target rate of change, cancel the downshifting operation and maintain the current gear; if the rate of change of the ground adhesion rate in the previous cycle is less than or equal to the target rate of change, perform the downshifting operation.

2. The method according to claim 1, characterized in that, The motion state information includes road slope, current gear, target gear, shift process, shift mode, drive wheel speed, and vehicle speed; wherein, the method further includes: determining whether the vehicle is in the target uphill condition based on the road slope.

3. The method according to claim 2, characterized in that, The calculation of the current ground adhesion rate based on the motion state information includes: calculating the target slip ratio based on the drive wheel speed and the vehicle speed; and when the target slip ratio is within the target linear change range, calculating the ground adhesion rate for the current cycle based on the slope of the target slip ratio.

4. The method according to claim 3, characterized in that, The step of determining whether a vehicle is on a target slippery road surface based on the ground adhesion rate includes: when the target slip rate meets a calibration threshold, determining whether the ground adhesion rate of the current cycle is less than the target adhesion rate threshold; if the ground adhesion rate of the current cycle is less than the target adhesion rate threshold, then determining that the vehicle is on the target slippery road surface.

5. The method according to claim 2, characterized in that, The gear control based on the motion state information includes: determining the target process range to which the gear shifting process belongs; if the target process range is the first process range, canceling the downshifting operation and maintaining the current gear.

6. The method according to claim 5, characterized in that, The gear control based on the motion state information includes: determining the target process range to which the gear shifting process belongs; if the target process range is a third process range, performing a downshift operation.

7. A vehicle gear control device, characterized in that, include: The data acquisition module is used to acquire the vehicle's motion status information in real time; The data calculation module is used to calculate the current ground adhesion rate based on the motion state information when the vehicle is in the target uphill condition; the environment judgment module is used to determine whether the vehicle is on the target slippery road surface based on the ground adhesion rate. A gear control module is used to control the gear position based on the motion state information when the vehicle is on the target slippery road surface and there is a need to downshift. The gear control module includes: a fourth judgment unit, used to determine the target process range to which the gear shifting process belongs, the target process range being a range representing the stage of the gear shifting operation, with a first process range of 0%~S1, a second process range of S1~S2, and a third process range of S2~100%; a fifth judgment unit, used to determine whether the rate of change of the ground adhesion rate in the previous cycle is greater than a target rate of change if the target process range is the second process range; a second processing unit, used to cancel the downshifting operation and maintain the current gear if the rate of change of the ground adhesion rate in the previous cycle is greater than the target rate of change; and a third processing unit, used to perform a downshifting operation if the rate of change of the ground adhesion rate in the previous cycle is less than or equal to the target rate of change.

8. A vehicle gear control device, characterized in that, include: processor; A memory for storing executable instructions; wherein the processor is configured to read the executable instructions from the memory and execute the executable instructions to implement the vehicle gear control method according to any one of claims 1-6.

9. A non-volatile computer-readable storage medium, characterized in that, The storage medium stores a computer program, which, when executed by a processor, causes the processor to implement the vehicle gear control method according to any one of claims 1-6.

Images