Control method, device and equipment for improving vehicle slipping and storage medium

Abstract

A control method, device and equipment for improving vehicle slip and a storage medium relate to the technical field of vehicle braking, and comprise the following steps: calculating a slip rate threshold value of vehicle driving according to an obtained current driving mode and road surface type of a vehicle; according to the vehicle running slip rate threshold value and the obtained wheel speed and vehicle speed of the vehicle, the output torque of the vehicle is reduced, so that the vehicle is better prevented from slipping in different driving modes, and the driving safety of the vehicle is improved. The technical problem that in the related technology, in the braking anti-slip process based on the slip rate of a tire, anti-slip treatment under different driving modes is not considered, and serious slip of a vehicle is likely to occur in the braking process is solved. The anti-slip treatment under different driving modes is considered in the anti-slip process based on the slip rate, and the vehicle can be better prevented from slipping in the braking process.

Description

Technical Field

[0001] The present application relates to the technical field of vehicle braking, and specifically relates to a control method, device, equipment and storage medium for improving vehicle skidding on wet roads. Background Art

[0002] At present, many vehicles have large starting torque, fast response, and the vehicle has higher and higher requirements for cruising range, requiring the rolling resistance of the tires to be continuously reduced. In related technologies, the power control strategies of vehicles are all implemented based on this important parameter of the slip ratio of the tires. For example, the most commonly used control method of the anti-lock braking system (ABS) is the control method based on the slip ratio. The slip ratio directly affects the friction force of the tire on the road surface, and thus affects the braking efficiency. Another example is that the anti-slip regulation system (ASR) can improve the driving efficiency of the vehicle by controlling the slip ratio of the driving wheels when the vehicle is driving. However, the prior art does not consider the anti-skid treatment under different driving modes during the process of braking and anti-skidding based on the slip ratio of the tires, which easily leads to the risk of vehicle skidding. Summary of the Invention

[0003] The present application provides a control method, device, equipment and storage medium for improving vehicle skidding, which can solve the technical problem in the prior art that the anti-skid treatment under different driving modes is not considered during the process of braking and anti-skidding based on the slip ratio of the tires, which easily leads to the risk of vehicle skidding.

[0004] In a first aspect, an embodiment of the present application provides a control method for improving vehicle skidding, and the control method for improving vehicle skidding includes:

[0005] Calculating a slip ratio threshold value for vehicle driving according to the obtained current driving mode and road surface type of the vehicle;

[0006] Reducing the output torque of the vehicle according to the slip ratio threshold value for vehicle driving and the obtained wheel speed and vehicle speed of the vehicle, so as to prevent the vehicle from skidding during braking while taking into account the performance of different driving modes.

[0007] In combination with the first aspect, in an implementation manner, the calculating a slip ratio threshold value for vehicle driving according to the obtained current driving mode and road surface type of the vehicle includes:

[0008] Obtaining a correction coefficient corresponding to the driving mode according to the obtained driving mode and a preset driving mode correction coefficient table;

[0009] Obtaining an optimal slip ratio according to the obtained road surface type and a preset adhesion coefficient-slip ratio mathematical model;

[0010] Calculate the slip rate threshold value for vehicle driving based on the first preset formula, the correction coefficient, and the optimal slip rate.

[0011] Combined with the first aspect, in one implementation, the calculating the optimal slip rate according to the obtained road surface type includes:

[0012] Obtain road surface parameters according to the obtained road surface type and the preset road surface parameter table;

[0013] Obtain the optimal slip rate according to the road surface parameters and the preset adhesion coefficient - slip rate mathematical model.

[0014] Combined with the first aspect, in one implementation, the reducing the output torque of the vehicle according to the slip rate threshold value of the vehicle driving and the obtained wheel speed and vehicle speed of the vehicle includes:

[0015] Calculate the real - time slip rate of the vehicle according to the obtained wheel speed and vehicle speed of the vehicle;

[0016] Compare the real - time slip rate of the vehicle with the slip rate threshold value of the vehicle driving to determine whether to reduce the output torque of the vehicle;

[0017] When the real - time slip rate is greater than the slip rate threshold value, reduce the output torque of the vehicle.

[0018] Combined with the first aspect, in one implementation, the calculating the real - time slip rate of the vehicle according to the obtained wheel speed and vehicle speed of the vehicle includes:

[0019] Obtain the current wheel speed and vehicle speed of the vehicle;

[0020] Calculate the real - time slip rate of the vehicle according to the wheel speed, the vehicle speed, and the second preset formula.

[0021] Combined with the first aspect, in one implementation, the driving mode includes Sport, ECO, and Normal.

[0022] Combined with the first aspect, in one implementation, the when the real - time slip rate is greater than the slip rate threshold value, reducing the output torque of the vehicle includes:

[0023] Determine the target driving torque according to the obtained throttle opening and the driving mode;

[0024] Reduce the output torque of the current vehicle based on the target driving torque.

[0025] In a second aspect, an embodiment of the present application provides a control method device for improving vehicle skidding, characterized in that the control method device for improving vehicle skidding includes:

[0026] A calculation module, configured to calculate a slip ratio threshold value for vehicle driving according to the obtained current driving mode and road surface type of the vehicle.

[0027] A torque reduction module, configured to reduce the output torque of the vehicle according to the slip ratio threshold value of the vehicle driving and the obtained wheel speed and vehicle speed of the vehicle, so as to meet the user's experience requirements for different driving modes during the vehicle anti-skid process.

[0028] In a third aspect, an embodiment of the present application provides a control method device for improving vehicle skidding, characterized in that the control method device for improving vehicle skidding includes a processor, a memory, and a control method program for improving vehicle skidding stored on the memory and executable by the processor. When the control method program for improving vehicle skidding is executed by the processor, the steps of the control method for improving vehicle skidding described in any one of the above are implemented.

[0029] In a fourth aspect, an embodiment of the present application provides a computer-readable storage medium, characterized in that a control method program for improving vehicle skidding is stored on the computer-readable storage medium. When the control method program for improving vehicle skidding is executed by a processor, the steps of the control method for improving vehicle skidding described in any one of the above are implemented.

[0030] The beneficial effects brought by the technical solution provided by the embodiment of the present application at least include:

[0031] By calculating the slip ratio threshold value for vehicle driving according to the obtained current driving mode and road surface type of the vehicle; and reducing the output torque of the vehicle according to the slip ratio threshold value of the vehicle driving and the obtained wheel speed and vehicle speed of the vehicle, so that the vehicle can better prevent skidding in different driving modes, the technical problem in the related art that there is no consideration of anti-skid processing in different driving modes during the process of braking and anti-skidding based on the slip ratio of the tire, which easily leads to the risk of vehicle skidding, is solved. The present application considers anti-skid processing in different driving modes during the process of anti-skidding based on the slip ratio, and can better prevent vehicle skidding. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a schematic flowchart of an embodiment of the control method for improving vehicle skidding of the present application;

[0033] Figure 2 For the present application Figure 1 It is a schematic detailed flowchart of step S10 in the present application;

[0034] Figure 3 It is a schematic functional module diagram of an embodiment of the control method device for improving vehicle skidding of the present application;

[0035] Figure 4 This is a schematic diagram of the hardware structure of the control method and device for improving vehicle skidding involved in the solution of the embodiment of the present application. Detailed implementation manners

[0036] In order to enable those skilled in the art to better understand the solution of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0037] The terms "including" and "having" and any variations thereof in the specification and claims of the present application and the above-mentioned accompanying drawings are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but may optionally further include steps or units not listed, or may optionally further include other steps or units inherent to these processes, methods, products or devices. The descriptions with terms such as "first", "second", and "third" are used to distinguish different objects, etc., and do not represent a sequential order, nor do they limit that "first", "second", and "third" are different types.

[0038] In the description of the embodiments of the present application, "exemplary", "for example" or "for instance" etc. are used to indicate as an example, illustration or explanation. Any embodiment or design solution described as "exemplary", "for example" or "for instance" in the embodiments of the present application should not be construed as being more preferred or having more advantages than other embodiments or design solutions. Exactly speaking, the use of words such as "exemplary", "for example" or "for instance" is intended to present relevant concepts in a specific manner.

[0039] In the description of the embodiments of the present application, unless otherwise specified, " / " means "or". For example, A / B may mean A or B; the "and / or" in the text is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B may mean: A exists alone, A and B exist simultaneously, and B exists alone. In addition, in the description of the embodiments of the present application, "a plurality of" means two or more than two.

[0040] In some processes described in the embodiments of the present application, multiple operations or steps appear in a specific order. However, it should be understood that these operations or steps may not be executed in the order in which they appear in the embodiments of the present application or may be executed in parallel. The serial numbers of the operations are only used to distinguish different operations, and the serial numbers themselves do not represent any execution order. In addition, these processes may include more or fewer operations, and these operations or steps may be executed in sequence or in parallel, and these operations or steps may be combined.

[0041] First, some technical terms in the present application are explained to facilitate the understanding of the present application by those skilled in the art.

[0042] To make the objectives, technical solutions, and advantages of the present application clearer, the embodiments of the present application will be further described in detail below with reference to the accompanying drawings.

[0043] In a first aspect, an embodiment of the present application provides a control method for improving vehicle skidding.

[0044] In one embodiment, referring to Figure 1 , Figure 1 is a schematic flowchart of the first embodiment of the control method for improving vehicle skidding in the present application. As Figure 1 shown, the control method for improving vehicle skidding includes:

[0045] Step S10: Calculate the slip ratio threshold value for vehicle driving according to the acquired current driving mode and road surface type of the vehicle;

[0046] Exemplarily, based on the driving mode, road surface type, and pre-set slip ratio threshold value table, obtain the slip ratio threshold value corresponding to the driving mode and road surface type. The pre-set slip ratio threshold value table is as follows:

[0047]

[0048] For example, when it is detected that the vehicle is driving on an icy road surface and is in the ECO driving mode, according to the above table, the corresponding slip ratio threshold value is 0.273.

[0049] Specifically, the driving mode includes Sport, ECO, and Normal.

[0050] ECO Driving Mode: ECO is an abbreviation of three English words: ecology, energy conservation, and optimization. Together, it means economic and environmental protection. As the name implies, the economic mode is a fuel-saving mode. The engine and transmission work with the most fuel-efficient logic, controlling the engine speed with the most reasonable gear to achieve the purpose of fuel saving. The ultimate goal of the economic mode is to save fuel. With this logic being the top priority, power performance must be sacrificed. Turning on the economic mode does save fuel, but the vehicle's power will be weakened. The applicable vehicle speed for the economic mode is 60 - 100 km / h. Going too high or too low will increase fuel consumption. At low speeds, the fuel consumption can even be higher than that at high speeds. For example, when driving slowly and stopping frequently in the city, the fuel consumption is the highest. The economic mode is suitable for driving at medium and low speeds. When the speed is too high, such as exceeding 100 km / h, even if the economic mode is turned on, it won't save much fuel. After all, such a high vehicle speed will cause a large amount of wind resistance, and overcoming the wind resistance will consume a large amount of fuel, so it's impossible to save fuel.

[0051] Sport Driving Mode: The ultimate goal of the Sport driving mode is to ensure the vehicle has strong power. When working in this mode, it can improve the vehicle's power performance, bringing a higher level of response speed and driving experience. It is suitable for driving at medium and high speeds, and on roads with good road conditions. It is the guarantee of speed and power. For many luxury cars with strong power, turning on this function makes them equivalent to a "racing car". When a vehicle works in the sport mode, the engine intake increases, the engine speed increases, the throttle response speed is fast, the support force becomes stronger, and the driving experience is mainly intense. As long as the throttle is lightly stepped on, the engine speed will soar, and at the same time, the vehicle speed will increase rapidly. The sport mode is suitable for normal driving and overtaking on the highway. When overtaking, the increase in vehicle speed is very important, and the shorter the overtaking time, the better. All of these can be achieved in the sport mode. The sport mode ensures strong power, so it sacrifices fuel economy, and the fuel consumption will definitely increase significantly. The fuel consumption in the sport mode is at least 20 - 40% higher than that in the economic mode.

[0052] Normal Driving Mode: The Normal driving mode is actually a compromise version between the ECO driving mode and the Sport driving mode, that is, to achieve a certain balance between the economic mode and the sport mode, ensuring both fuel economy and strong power.

[0053] When choosing this mode, the vehicle computer will automatically match the most suitable overall vehicle power performance and economy. The engine speed, power strength, fuel consumption, and comfort are all maintained within the most reasonable range. Moreover, this mode can be turned on regardless of the speed or road conditions. This is also the most commonly used mode.

[0054] Step S20: According to the slip rate threshold value of the vehicle during driving, and the wheel speed and vehicle speed of the vehicle obtained, reduce the output torque of the vehicle to enable the vehicle to better prevent skidding in different driving modes.

[0055] Exemplarily, the real-time slip rate of the vehicle is calculated based on the acquired wheel speed and vehicle speed, and the real-time slip rate is compared with the slip rate threshold value. When the real-time slip rate is greater than the slip rate threshold value, the output torque of the vehicle is reduced.

[0056] Specifically, reducing the output torque of the vehicle according to the slip rate threshold value of the vehicle and the acquired wheel speed and vehicle speed of the vehicle includes: calculating the real-time slip rate of the vehicle according to the acquired wheel speed and vehicle speed of the vehicle; comparing the real-time slip rate of the vehicle with the slip rate threshold value of the vehicle to determine whether to reduce the output torque of the vehicle; and reducing the output torque of the vehicle when the real-time slip rate is greater than the slip rate threshold value.

[0057] Demonstratively, the braking process of a car from pure rolling to locking and sliding is a gradual process, which goes through three stages: pure rolling, rolling and sliding, and pure sliding. In order to evaluate the proportion of the vehicle wheel slip component, the slip rate is often used to express it. When the real-time slip rate is detected to be greater than the slip rate threshold, it means that the proportion of the vehicle wheel slip component is too large, and serious slipping problems will occur, which greatly affects the driving experience. At this time, it is necessary to reduce the vehicle's output torque to reduce the real-time slip rate and improve the slip problem.

[0058] Specifically, calculating the real-time slip rate of the vehicle based on the acquired wheel speed and vehicle speed includes: acquiring the current wheel speed and vehicle speed of the vehicle; and calculating the real-time slip rate of the vehicle based on the wheel speed, the vehicle speed and a second preset formula.

[0059] Exemplarily, according to the wheel speed and the vehicle speed and the second preset formula S=(u t -u a ) / u t , the real-time slip rate of the vehicle can be calculated, where S is the real-time slip rate, u t is the vehicle speed, u a is the wheel speed.

[0060] The slip rate refers to the slip between the tire footprint and the road surface when the tire brakes or accelerates while driving straight. When the wheel speed and vehicle speed are inconsistent, slip occurs. The real-time slip rate is calculated by dividing the difference between the vehicle speed and the wheel speed by the vehicle speed. The slip rate indicates the proportion of the slip component.

[0061] Specifically, when the real-time slip rate is greater than the slip rate threshold value, reducing the output torque of the vehicle includes: determining a target driving torque according to the acquired throttle opening and the driving mode; and reducing the current output torque of the vehicle based on the target driving torque.

[0062] Exemplarily, the torque output characteristics of the vehicle are determined according to the driving mode. For example, when it is determined that the driving mode is ECO, the torque output characteristic curve is a "concave function", the torque response is slow and the torque output is small, maintaining good economy; when it is determined that the driving mode is Normal or Sport driving mode, the inflection point of the torque output of the torque output characteristic curve advances, the torque response is fast and the torque output is large, and the torque response in the Sport driving mode is faster and the torque output is larger; the target driving torque is determined according to the obtained driving throttle opening, driving mode and the corresponding torque output characteristic curve. For example, when it is detected that the throttle opening is 20%, the driving mode is ECO, the driving torque corresponding to the throttle opening of 20% is found on the corresponding torque output characteristic curve as the target driving torque. After the target driving torque is determined, control the MTCU to output torque to the vehicle according to the target driving torque. For example, when the target driving torque is determined to be 200 N·m, control the MTCU to output a torque of 200 N·m to the vehicle. When it is detected that the real-time slip ratio is greater than the slip ratio threshold, control the MTCU to reduce the torque until the output torque of the MTCU drops to a value that can make the real-time slip ratio less than or equal to the slip ratio threshold.

[0063] For example, when it is detected that the vehicle is in the Sport driving mode, the optimal slip ratio calculated by the system is 0.12, and the slip ratio threshold is 0.132. If according to the technical solution of the present application, when it is detected in real time that the slip ratio of the vehicle exceeds the slip ratio threshold of 0.132, the output torque of the vehicle starts to be reduced, and the vehicle speed can be adjusted to the target value in a relatively short time; if according to the existing related technical solution, when it is detected in real time that the slip ratio of the vehicle exceeds the optimal slip ratio of 0.12, the output torque of the vehicle starts to be reduced, and at this time, the vehicle speed cannot be adjusted to the target value in a short time. Another example, when it is detected that the vehicle is in the ECO driving mode, the optimal slip ratio calculated by the system is 0.1, and the slip ratio threshold is 0.08. If according to the technical solution of the present application, when it is detected in real time that the slip ratio of the vehicle exceeds the slip ratio threshold of 0.05, the output torque of the vehicle starts to be reduced, which can ensure that the vehicle does not slip severely; if according to the existing related technical solution, when it is detected in real time that the slip ratio of the vehicle exceeds the optimal slip ratio of 0.1, the output torque of the vehicle starts to be reduced, and at this time, the vehicle has already slipped severely, affecting normal driving.

[0064] In this embodiment, by calculating the slip rate threshold value of vehicle travel according to the acquired current driving mode and road surface type of the vehicle; and reducing the output torque of the vehicle according to the slip rate threshold value of vehicle travel and the acquired wheel speed and vehicle speed of the vehicle, so that the vehicle can better prevent slipping in different driving modes, which solves the technical problem in the related art that the anti-slip process based on the slip rate of the tire does not consider the anti-slip treatment in different driving modes, and easily leads to the risk of vehicle slipping. This application considers the anti-slip treatment in different driving modes during the anti-slip process based on the slip rate, and can better prevent the vehicle from slipping.

[0065] Further, in one embodiment, with reference to Figure 2 , Figure 2 is the detailed process schematic diagram of step S10 in this application. As Figure 1 shown, the calculating the slip rate threshold value of vehicle travel according to the acquired current driving mode and road surface type of the vehicle includes: Figure 2 shown, the calculating the slip rate threshold value of vehicle travel according to the acquired current driving mode and road surface type of the vehicle includes:

[0066] Step S11: Obtain the correction coefficient corresponding to the driving mode according to the acquired driving mode and the preset driving mode correction coefficient table;

[0067] Exemplarily, find out the correction coefficient corresponding to the vehicle driving mode in the preset driving mode correction coefficient table, where the driving modes are divided into: Sport, ECO, Normal, and the preset driving mode correction coefficient table is as follows:

[0068]

[0069] The vehicle performance evaluation index can be determined according to different vehicle models, the working conditions of the vehicle, and the driving mode and the preset vehicle performance evaluation table corresponding to the vehicle model. The performance indexes include the yaw angular velocity performance index and the lateral displacement performance index of the wheels. For example, the preset vehicle performance evaluation table of Model A is as follows:

[0070]

[0071] In the above table, flat high adhesion represents a flat road surface with a high adhesion coefficient. Among them, the road surfaces with a high adhesion coefficient include dry asphalt road surface, dry cobblestone road surface, and dry cement road surface; flat low adhesion represents a flat road surface with a low adhesion coefficient. Among them, the road surfaces with a low adhesion coefficient include wet asphalt road surface, wet cobblestone road surface, snow road surface, and ice road surface; flat split represents that on a flat road surface, the adhesion coefficients of the road surfaces contacted by the left and right wheels of the vehicle are different, one is higher and the other is lower; flat butt joint road surface represents that on a flat road surface, the adhesion coefficients of the road surfaces contacted by the front and rear wheels of the vehicle are different, one is higher and the other is lower.

[0072] Modify the preset standard correction factor according to the actual performance values of the vehicle and the preset vehicle performance indicators. When the detected actual performance value of the vehicle is not within the preset range in the above table, modify the preset standard correction factor 1. For each additional actual performance value exceeding the preset range, increase the preset standard correction factor 1 by 0.1 or decrease it by 0.1. If the detected driving mode is Sport, increase it by 0.1. If the detected driving mode is ECO, decrease it by 0.1. For example, when it is detected that the driving mode of vehicle type A is ECO, the actual yaw rate is 5 deg / S, the lateral displacement is 0.4 m, and the working condition is flat road with high adhesion, and there is one actual performance value not within the preset range, then the preset standard correction factor is increased by 0.1, that is, the correction factor is modified to 1.1. Another example, when it is detected that the driving mode of vehicle type A is ECO, the actual yaw rate is 5 deg / S, the lateral displacement is 0.4 m, and the working condition is a two-way road, and there is one actual performance value not within the preset range, then the preset standard correction factor is decreased by 0.1, that is, the correction factor is 0.9.

[0073] Step S12: Obtain the optimal slip ratio according to the acquired road surface type and the preset adhesion coefficient-slip ratio mathematical model;

[0074] Exemplarily, find the corresponding road surface parameters in the preset road surface parameter table according to the acquired road surface type, and substitute the road surface parameters into the preset adhesion coefficient-slip ratio mathematical model to obtain the optimal slip ratio.

[0075] Specifically, the obtaining the optimal slip ratio according to the acquired road surface type and the preset adhesion coefficient-slip ratio mathematical model includes: obtaining road surface parameters according to the acquired road surface type and the preset road surface parameter table; obtaining the optimal slip ratio according to the road surface parameters and the preset adhesion coefficient-slip ratio mathematical model.

[0076] Exemplarily, obtain road surface parameters according to the acquired road surface type and the preset road surface parameter table, where the road surface types include icy road surface, snow-covered road surface, wet cobblestone road surface, wet asphalt road surface, dry cement road surface, dry cobblestone road surface, dry asphalt road surface, and the preset road surface parameter table is as follows:

[0077]

[0078] For example, when the detected road surface type is icy, its corresponding road surface parameters c1 is 0.05, c2 is 306.39, c3 is 0.001, and substitute them into the preset adhesion coefficient-slip ratio mathematical model as where u is the acquired road surface adhesion coefficient, and find the slip ratio corresponding to the maximum road surface adhesion coefficient in this mathematical model is 0.031, then the slip ratio 0.031 is the optimal slip ratio.

[0079] Step S13: Based on the first preset formula, the correction coefficient, and the optimal slip ratio, calculate the slip ratio threshold value for vehicle driving.

[0080] Exemplarily, substitute the correction coefficient and the optimal slip ratio into the first preset formula S i = S o *τ to calculate the slip ratio threshold value, where S i is the slip ratio threshold value, S o is the optimal slip ratio, and τ is the correction coefficient.

[0081] In this embodiment, by obtaining the driving mode and the preset driving mode correction coefficient table, obtaining the correction coefficient corresponding to the driving mode; calculating the optimal slip ratio according to the obtained road surface type; and calculating the slip ratio threshold value for vehicle driving based on the first preset formula, the correction coefficient, and the optimal slip ratio, it solves the problem in the related art that only the optimal slip ratio is used to determine whether to reduce the output torque of the vehicle, without considering the influence of the driving mode on the output torque of the vehicle, and cannot achieve a good anti-slip effect. This embodiment provides a method for obtaining the slip ratio threshold value, which takes into account the influence of the driving mode on the output torque of the vehicle, and judges whether to reduce the torque of the vehicle based on the slip ratio threshold value, and can better prevent slipping in different driving modes.

[0082] In a second aspect, an embodiment of the present application further provides a control method device for improving vehicle skidding.

[0083] In one embodiment, referring to Figure 3 , Figure 3 is a schematic diagram of the functional modules of an embodiment of the control method device for improving vehicle skidding in the present application. As Figure 3 shown, the control method device for improving vehicle skidding includes:

[0084] Calculation module 01, which calculates the slip ratio threshold value for vehicle driving according to the obtained current driving mode and road surface type of the vehicle;

[0085] Torque reduction module 02, which is used to reduce the output torque of the vehicle according to the slip ratio threshold value of the vehicle driving and the obtained wheel speed and vehicle speed of the vehicle, so as to meet the user's experience requirements for different driving modes during the vehicle anti-skidding process.

[0086] Furthermore, in one embodiment, the calculation module 01 is further used for:

[0087] Obtaining the correction coefficient corresponding to the driving mode according to the obtained driving mode and the preset driving mode correction coefficient table;

[0088] Obtain the optimal slip ratio based on the obtained road surface type and the preset adhesion coefficient-slip ratio mathematical model;

[0089] Based on the first preset formula, the correction coefficient and the optimal slip ratio, calculate the slip ratio threshold value for vehicle driving.

[0090] Further, in an embodiment, the torque reduction module 02 is further configured to:

[0091] Calculate the real-time slip ratio of the vehicle according to the obtained wheel speed and vehicle speed of the vehicle;

[0092] Compare the real-time slip ratio of the vehicle with the slip ratio threshold value for vehicle driving to determine whether to reduce the output torque of the vehicle;

[0093] When the real-time slip ratio is greater than the slip ratio threshold value, reduce the output torque of the vehicle.

[0094] Wherein, the function implementation of each module in the above control method device for improving vehicle skidding corresponds to each step in the above embodiment of the control method for improving vehicle skidding, and its function and implementation process will not be elaborated here one by one.

[0095] In a third aspect, an embodiment of the present application provides a control method device for improving vehicle skidding. The control method device for improving vehicle skidding can be a device with data processing functions such as a personal computer (PC), a notebook computer, a server, etc.

[0096] Refer to Figure 4 , Figure 4 which is a schematic diagram of the hardware structure of the control method device for improving vehicle skidding involved in the solution of the embodiment of the present application. In the embodiment of the present application, the control method device for improving vehicle skidding may include a processor, a memory, a communication interface, and a communication bus.

[0097] Among them, the communication bus can be of any type and is used to interconnect the processor, the memory, and the communication interface.

[0098] The communication interface includes input / output (I / O) interfaces, physical interfaces, and logical interfaces, etc., which are used to implement the interconnection of components inside the control method device for improving vehicle skidding, and interfaces for implementing the interconnection of the control method device for improving vehicle skidding with other devices (such as other computing devices or user devices). The physical interface can be an Ethernet interface, a fiber optic interface, an ATM interface, etc.; the user device can be a display screen (Display), a keyboard (Keyboard), etc.

[0099] The memory can be various types of storage media, such as random access memory (RAM), read-only memory (ROM), non-volatile RAM (NVRAM), flash memory, optical memory, hard disk, programmable ROM (PROM), erasable PROM (EPROM), electrically erasable PROM (EEPROM), etc.

[0100] The processor can be a general-purpose processor, which can call the control method program for improving vehicle skidding stored in the memory and execute the control method for improving vehicle skidding provided by the embodiments of the present application. For example, the general-purpose processor can be a central processing unit (CPU). Among them, the method executed when the control method program for improving vehicle skidding is called can refer to the various embodiments of the control method for improving vehicle skidding in the present application, which will not be elaborated here.

[0101] Those skilled in the art can understand that Figure 4 the hardware structure shown in does not constitute a limitation to the present application, and may include more or fewer components than shown in the figure, or combine certain components, or arrange different components.

[0102] In a fourth aspect, the embodiments of the present application further provide a readable storage medium.

[0103] The control method program for improving vehicle skidding is stored on the readable storage medium of the present application. When the control method program for improving vehicle skidding is executed by a processor, the steps of the control method for improving vehicle skidding as described above are implemented.

[0104] Among them, the method implemented when the control method program for improving vehicle skidding is executed can refer to the various embodiments of the control method for improving vehicle skidding in the present application, which will not be elaborated here.

[0105] It should be noted that the serial numbers of the above embodiments of the present application are only for description and do not represent the advantages and disadvantages of the embodiments.

[0106] Through the description of the above embodiments, those skilled in the art can clearly understand that the above-described example methods can be implemented by means of software plus a necessary general hardware platform. Of course, they can also be implemented by hardware, but in many cases the former is a better implementation method. Based on such an understanding, the technical solution of the present application, in essence, or the part that contributes to the prior art can be embodied in the form of a software product. This computer software product is stored in a storage medium as described above (such as ROM / RAM, magnetic disk, optical disk) and includes several instructions for causing a terminal device to execute the methods described in various embodiments of the present application.

[0107] The above are only the preferred embodiments of the present application, and do not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made by using the content of the specification and drawings of the present application, or directly or indirectly applied in other related technical fields, shall be equally included in the patent protection scope of the present application.

Claims

1. A control method for improving vehicle skidding, characterized in that: The control method for improving vehicle skidding comprises: Calculate the slip rate threshold value of the vehicle according to the acquired current driving mode and road type of the vehicle; According to the slip rate threshold value of the vehicle and the acquired wheel speed and vehicle speed of the vehicle, the output torque of the vehicle is reduced so that the vehicle can better prevent slipping in different driving modes.

2. The control method for improving vehicle skidding according to claim 1, characterized in that: The step of calculating the slip rate threshold value of the vehicle according to the acquired current driving mode and road type of the vehicle includes: Obtaining a correction coefficient corresponding to the driving mode according to the acquired driving mode and a preset driving mode correction coefficient table; Determining an optimal slip rate according to the acquired road surface type and a preset adhesion coefficient-slip rate mathematical model; Based on the first preset formula, the correction coefficient and the optimal slip ratio, a slip ratio threshold value for vehicle driving is calculated.

3. The control method for improving vehicle skidding as claimed in claim 2, characterized in that: Determining the optimal slip rate according to the acquired road surface type and the preset adhesion coefficient-slip rate mathematical model includes: Obtaining road surface parameters according to the acquired road surface type and a preset road surface parameter table; The optimum slip rate is obtained according to the road surface parameters and a preset adhesion coefficient-slip rate mathematical model.

4. The control method for improving vehicle skidding according to claim 1, characterized in that: The reducing the output torque of the vehicle according to the slip rate threshold value of the vehicle and the acquired wheel speed and vehicle speed of the vehicle comprises: Calculating a real-time slip rate of the vehicle according to the acquired wheel speed and vehicle speed of the vehicle; comparing the real-time slip rate of the vehicle with a slip rate threshold value of the vehicle to determine whether to reduce the output torque of the vehicle; When the real-time slip ratio is greater than the slip ratio threshold, the output torque of the vehicle is reduced.

5. The control method for improving vehicle skidding as claimed in claim 4, characterized in that: The step of calculating the real-time slip rate of the vehicle according to the acquired wheel speed and vehicle speed includes: Obtaining the current wheel speed and vehicle speed of the vehicle; The real-time slip rate of the vehicle can be calculated according to the wheel speed, the vehicle speed and a second preset formula.

6. The control method for improving vehicle skidding as claimed in claim 1, characterized in that: The driving modes include Sport, ECO, and Normal.

7. The control method for improving vehicle skidding as claimed in claim 4, characterized in that: When the real-time slip rate is greater than the slip rate threshold value, reducing the output torque of the vehicle includes: Determining a target driving torque according to the acquired throttle opening and the driving mode; The current output torque of the vehicle is reduced based on the target driving torque.

8. A control method and device for improving vehicle skidding, characterized in that: The control method and device for improving vehicle skidding comprises: A calculation module, used to calculate a slip rate threshold value of the vehicle according to the acquired current driving mode and road type of the vehicle; The torque reduction module is used to reduce the output torque of the vehicle according to the slip rate threshold value of the vehicle and the acquired wheel speed and vehicle speed of the vehicle, so as to meet the user's experience requirements for different driving modes during the vehicle anti-skid process.

9. A control method and device for improving vehicle skidding, characterized in that: The control method device for improving vehicle slip comprises a processor, a memory, and a control method program for improving vehicle slip stored in the memory and executable by the processor, wherein when the control method program for improving vehicle slip is executed by the processor, the steps of the control method for improving vehicle slip as described in any one of claims 1 to 7 are implemented.

10. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a control method program for improving vehicle slippage, wherein when the control method program for improving vehicle slippage is executed by a processor, the steps of the control method for improving vehicle slippage as described in any one of claims 1 to 7 are implemented.

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