Methods, devices, equipment and storage media for improving vehicle skidding control

Abstract

A control method, apparatus, device, and storage medium for improving vehicle slippage, relating to the field of vehicle braking technology, includes: calculating a slip ratio threshold value for the vehicle based on the current driving mode and road surface type; and reducing the output torque of the vehicle based on the slip ratio threshold value and the wheel speed and vehicle speed, so as to better prevent slippage in different driving modes. This solves the technical problem in related technologies that do not consider slippage prevention treatment under different driving modes in the process of braking slippage prevention based on tire slip ratio, which easily leads to serious slippage of the vehicle during braking. This application considers slippage prevention treatment under different driving modes in the process of slip ratio-based slippage prevention, and can better prevent vehicle slippage during braking.

Description

Technical Field

[0001] This application relates to the field of vehicle braking technology, specifically to a control method, device, equipment, and storage medium for improving vehicle slippage on wet surfaces. Background Technology

[0002] Many vehicles today have high starting torque and fast response, and the demand for longer driving ranges is increasing, requiring continuously reduced tire rolling resistance. Related vehicle power control strategies are all based on the crucial parameter of tire slip ratio. For example, the most common control method in anti-lock braking systems (ABS) is based on slip ratio, which directly affects the tire's friction with the road surface, thus impacting braking efficiency. Similarly, anti-slip regulation systems (ASR) control the slip ratio of the drive wheels to improve vehicle traction. However, current technologies for braking and anti-slip based on tire slip ratio do not consider anti-slip measures under different driving modes, potentially leading to the risk of vehicle skidding. Summary of the Invention

[0003] This application provides a control method, device, equipment, and storage medium to improve vehicle slippage, which can solve the technical problem in the prior art that the anti-slip treatment under different driving modes is not considered in the braking anti-slip process based on tire slip ratio, which can easily lead to the risk of vehicle slippage.

[0004] In a first aspect, embodiments of this application provide a control method for improving vehicle skidding, the control method for improving vehicle skidding includes:

[0005] Based on the current driving mode and road surface type of the vehicle, calculate the slip ratio threshold value of the vehicle.

[0006] Based on the slip ratio threshold of the vehicle and the obtained wheel speed and vehicle speed, the output torque of the vehicle is reduced so that the vehicle can maintain the performance of different driving modes while preventing slippage during braking.

[0007] In conjunction with the first aspect, in one implementation, calculating the vehicle's slip ratio threshold based on the acquired current driving mode and road surface type includes:

[0008] Based on the obtained driving mode and preset driving mode correction coefficient table, obtain the correction coefficient corresponding to the driving mode;

[0009] Based on the obtained road surface type and the pre-set adhesion coefficient-slip ratio mathematical model, the optimal slip ratio is obtained;

[0010] Based on the first preset formula, the correction coefficient, and the optimal slip ratio, the slip ratio threshold value for vehicle driving is calculated.

[0011] In conjunction with the first aspect, in one implementation, calculating the optimal slip ratio based on the acquired road surface type includes:

[0012] Based on the obtained road surface type and preset road surface parameter table, obtain the road surface parameters;

[0013] The optimal slip ratio is derived based on the road surface parameters and the pre-set adhesion coefficient-slip ratio mathematical model.

[0014] In conjunction with the first aspect, in one embodiment, reducing the output torque of the vehicle based on the slip ratio threshold value of the vehicle's travel, and the obtained wheel speed and vehicle speed, includes:

[0015] The real-time slip ratio of the vehicle is calculated based on the obtained wheel speed and vehicle speed.

[0016] The real-time slip ratio of the vehicle is compared with the slip ratio threshold value of the vehicle during driving to determine whether to reduce the output torque of the vehicle.

[0017] When the real-time slip ratio is greater than the slip ratio threshold, the vehicle's output torque is reduced.

[0018] In conjunction with the first aspect, in one implementation, calculating the real-time slip ratio of the vehicle based on the acquired wheel speed and vehicle speed includes:

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

[0020] The real-time slip ratio of the vehicle is calculated based on the wheel speed, the vehicle speed, and the second preset formula.

[0021] In conjunction with the first aspect, in one implementation, the driving modes include Sport, ECO, and Normal.

[0022] In conjunction with the first aspect, in one implementation, reducing the vehicle's output torque when the real-time slip ratio is greater than the slip ratio threshold includes:

[0023] The target drive torque is determined based on the obtained throttle opening and the driving mode.

[0024] The output torque of the vehicle is reduced based on the target driving torque.

[0025] Secondly, embodiments of this application provide a control method apparatus for improving vehicle skidding, characterized in that the control method apparatus for improving vehicle skidding includes:

[0026] The calculation module is used to calculate the slip ratio threshold value of the vehicle based on the current driving mode and road surface type of the vehicle.

[0027] The torque reduction module is used to reduce the output torque of the vehicle based on the slip ratio threshold value of the vehicle and the obtained wheel speed and vehicle speed, so as to meet the user's experience needs for different driving modes during the vehicle anti-skid process.

[0028] Thirdly, embodiments of this application provide a control method apparatus for improving vehicle skidding, characterized in that the control method apparatus for improving vehicle skidding includes a processor, a memory, and a control method program for improving vehicle skidding stored in the memory and executable by the processor, wherein when the control method program for improving vehicle skidding is executed by the processor, it implements the steps of the control method for improving vehicle skidding as described in any of the preceding claims.

[0029] Fourthly, embodiments of this application provide a computer-readable storage medium, characterized in that the computer-readable storage medium stores a control method program for improving vehicle skidding, wherein when the control method program for improving vehicle skidding is executed by a processor, it implements the steps of the control method for improving vehicle skidding as described in any of the preceding claims.

[0030] The beneficial effects of the technical solutions provided in this application include at least the following:

[0031] By calculating the vehicle's slip ratio threshold based on the current driving mode and road surface type, and then reducing the vehicle's output torque based on the slip ratio threshold, as well as the wheel speed and vehicle speed, the vehicle can better prevent slippage in different driving modes. This solves the technical problem in related technologies where anti-slip processing based on tire slip ratio does not consider anti-slip treatment under different driving modes, which can easily lead to the risk of vehicle slippage. This application considers anti-slip treatment under different driving modes in the slip ratio-based anti-slip process, which can better prevent vehicle slippage. Attached Figure Description

[0032] Figure 1 This is a flowchart illustrating an embodiment of the vehicle skidding control method of this application;

[0033] Figure 2 For this application Figure 1 A detailed flowchart of step S10;

[0034] Figure 3 This is a schematic diagram of the functional modules of an embodiment of the control method and apparatus for improving vehicle slippage according to this application;

[0035] Figure 4 This is a schematic diagram of the hardware structure of the control method and device for improving vehicle slippage involved in the embodiments of this application. Detailed Implementation

[0036] To enable those skilled in the art to better understand 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. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present application.

[0037] The terms "comprising" and "having," and any variations thereof, in the specification, claims, and accompanying drawings of this application are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or apparatus that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to such process, method, product, or apparatus. The terms "first," "second," and "third," etc., are used to distinguish different objects, etc., and do not indicate a sequence, nor do they limit "first," "second," and "third" to different types.

[0038] In the description of the embodiments of this application, terms such as "exemplary," "for example," or "for instance" are used to indicate examples, illustrations, or explanations. Any embodiment or design described as "exemplary," "for example," or "for instance" in the embodiments of this application should not be construed as being more preferred or advantageous than other embodiments or designs. Specifically, the use of terms such as "exemplary," "for example," or "for instance" is intended to present the relevant concepts in a concrete manner.

[0039] In the description of the embodiments of this application, unless otherwise stated, " / " means "or". For example, A / B can mean A or B. The "and / or" in the text is merely a description of the relationship between related objects, indicating that there can be three relationships. For example, A and / or B can mean: A exists alone, A and B exist simultaneously, and B exists alone. In addition, in the description of the embodiments of this application, "multiple" means two or more.

[0040] In some processes described in the embodiments of this application, multiple operations or steps are included in a specific order. However, it should be understood that these operations or steps may not be executed in the order they appear in the embodiments of this application, or they may be executed in parallel. The sequence number of the operation is only used to distinguish different operations, and the sequence number itself does not represent any execution order. In addition, these processes may include more or fewer operations, and these operations or steps may be executed sequentially or in parallel, and these operations or steps may be combined.

[0041] First, some of the technical terms used in this application will be explained to help those skilled in the art understand this application.

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

[0043] In a first aspect, embodiments of this application provide a control method for improving vehicle slippage.

[0044] In one embodiment, reference is made to Figure 1 , Figure 1 This is a flowchart illustrating the first embodiment of the method for improving vehicle skidding control according to this application. Figure 1 As shown, methods to improve vehicle slippage control include:

[0045] Step S10: Calculate the vehicle's slip ratio threshold based on the current driving mode and road surface type obtained from the vehicle.

[0046] As an example, the slip ratio threshold values ​​corresponding to the driving mode and road surface type are obtained based on the driving mode, road surface type, and preset slip ratio threshold value table, as shown below:

[0047]

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

[0049] Specifically, the driving modes include Sport, ECO, and Normal.

[0050] ECO Driving Mode: ECO is an abbreviation for Eco, Energy Saving, and Optimization, which together mean economical and environmentally friendly. As the name suggests, ECO mode is a fuel-saving mode. The engine and transmission operate with the most fuel-efficient logic, using the most appropriate gears to control engine speed and achieve fuel savings. Since the ultimate goal of ECO mode is fuel saving, this logic inevitably sacrifices power. While ECO mode does save fuel, the vehicle's power will be reduced. ECO mode is suitable for speeds of 60-100 km / h. Speeds that are too high or too low will increase fuel consumption; at low speeds, fuel consumption can even be higher than at high speeds. For example, in stop-and-go city driving, fuel consumption is highest at low speeds. ECO mode is suitable for low to medium speed driving. At higher speeds, such as exceeding 100 km / h, even with ECO mode activated, fuel savings are unlikely. This is because such high speeds create significant wind resistance, and overcoming wind resistance consumes a large amount of fuel, thus negating fuel efficiency.

[0051] Sport Driving Mode: The ultimate goal of Sport driving mode is to ensure the vehicle's powerful performance. Operating in this mode enhances the vehicle's power, delivering a higher level of responsiveness and driving experience. It's suitable for medium to high-speed driving, especially on roads with good conditions, guaranteeing both speed and power. Many powerful luxury cars, when using this mode, are essentially "race cars." In Sport mode, the engine intake increases, the RPM rises, the throttle response is faster, and the support is stronger, resulting in a more aggressive driving experience. Even a light touch on the accelerator will cause the engine RPM to soar, and the vehicle speed will increase rapidly. Sport mode is suitable for normal driving and overtaking on highways. When overtaking, increasing speed is crucial, and the shorter the overtaking time, the better—both can be achieved in Sport mode. However, while Sport mode ensures strong power, it sacrifices fuel economy, inevitably increasing fuel consumption significantly. Fuel consumption in Sport mode is at least 20-40% higher than in Eco mode.

[0052] Normal driving mode: Normal driving mode is actually a compromise between ECO driving mode and Sport driving mode. It strikes a balance between the economy mode and the sport mode, ensuring both fuel economy and strong power.

[0053] When this mode is selected, the vehicle's computer will automatically match the most suitable overall vehicle power and economy. Engine speed, power strength, fuel consumption, and comfort are all maintained within the most reasonable range. Moreover, this mode can be activated regardless of speed or road conditions, making it the most frequently used mode.

[0054] Step S20: Based on the slip ratio threshold of the vehicle and the obtained wheel speed and vehicle speed, reduce the output torque of the vehicle to better prevent slippage in different driving modes.

[0055] As an example, the real-time slip ratio of the vehicle is calculated based on the obtained wheel speed and vehicle speed. The real-time slip ratio is compared with a slip ratio threshold. When the real-time slip ratio is greater than the slip ratio threshold, the output torque of the vehicle is reduced.

[0056] Specifically, reducing the vehicle's output torque based on the vehicle's slip ratio threshold and the obtained wheel speed and vehicle speed includes: calculating the vehicle's real-time slip ratio based on the obtained wheel speed and vehicle speed; comparing the vehicle's real-time slip ratio with the vehicle's slip ratio threshold to determine whether to reduce the vehicle's output torque; and reducing the vehicle's output torque when the real-time slip ratio is greater than the slip ratio threshold.

[0057] As an example, the braking process of a car from pure rolling to locked-out skidding is a gradual process, going through three stages: pure rolling, rolling and sliding simultaneously, and pure slippage. To evaluate the proportion of wheel slip, the slip ratio is commonly used. When the real-time slip ratio exceeds a slip ratio threshold, it indicates that the proportion of wheel slip is too large, leading to severe slippage and significantly impacting the driving experience. In this case, it's necessary to reduce the vehicle's output torque to decrease the real-time slip ratio and improve the slippage problem.

[0058] Specifically, the step of calculating the real-time slip ratio of the vehicle based on the obtained wheel speed and vehicle speed includes: obtaining the current wheel speed and vehicle speed of the vehicle; and calculating the real-time slip ratio of the vehicle based on the wheel speed, the vehicle speed, and a second preset formula.

[0059] Exemplary, based on the wheel speed and the vehicle speed, and the second preset formula S = (u t -u a ) / u t The real-time slip ratio of the vehicle can be calculated, where S is the real-time slip ratio, and u t For vehicle speed, u a This refers to the wheel speed.

[0060] Slip ratio refers to the slippage between the tire tracks and the road surface when the tire is braking or accelerating while traveling in a straight line. Slippage occurs when the wheel speed and vehicle speed are not the same. The real-time slip ratio is calculated by dividing the difference between the vehicle speed and wheel speed by the vehicle speed. The slip ratio represents the proportion of slippage.

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

[0062] As an example, the vehicle's torque output characteristics are determined based on the driving mode. For instance, when the driving mode is ECO, the torque output characteristic curve is a concave function, indicating a slower torque response and lower torque output, maintaining good fuel economy. When the driving mode is Normal or Sport, the inflection point of the torque output characteristic curve appears earlier, indicating a faster torque response and higher torque output. The Sport driving mode exhibits an even faster torque response and higher torque output. The target drive torque is determined based on the obtained throttle opening, driving mode, and corresponding torque output characteristic curve. For example, if a throttle opening of 20% is detected and the driving mode is ECO, the drive torque corresponding to 20% throttle opening is found on the corresponding torque output characteristic curve and used as the target drive torque. Once the target drive torque is determined, the MTCU controls the vehicle to output torque based on this target torque. For example, if the target drive torque is determined to be 200 N·m, the MTCU controls the vehicle to output 200 N·m of torque. When the real-time slip ratio is detected to be greater than the slip ratio threshold, the MTCU is controlled to reduce torque until the output torque of the MTCU is reduced to a level that makes the real-time slip ratio less than or equal to the slip ratio threshold.

[0063] For example, when the vehicle is detected to be in Sport driving mode, the system calculates that the optimal slip ratio is 0.12 and the slip ratio threshold is 0.132. According to the technical solution of this application, when the slip ratio of the vehicle is detected to exceed the slip ratio threshold of 0.132 in real time, the output torque of the vehicle begins to decrease, and the vehicle speed can be adjusted to the target value in a shorter time. However, according to the existing related technical solutions, when the slip ratio of the vehicle is detected to exceed the optimal slip ratio of 0.12 in real time, the output torque of the vehicle begins to decrease, and the vehicle speed cannot be adjusted to the target value in a shorter time. For example, when the system detects that the vehicle is in ECO driving mode, it calculates that the optimal slip ratio is 0.1 and the slip ratio threshold is 0.08. According to the technical solution of this application, when the slip ratio of the vehicle is detected to exceed the slip ratio threshold of 0.05 in real time, the output torque of the vehicle is reduced to ensure that the vehicle does not slip severely. However, according to the existing related technical solutions, when the slip ratio of the vehicle is detected to exceed the optimal slip ratio of 0.1 in real time, the output torque of the vehicle is reduced. At this time, the vehicle has already slipped severely, affecting normal driving.

[0064] In this embodiment, a slip ratio threshold is calculated based on the current driving mode and road surface type of the vehicle. Based on the slip ratio threshold and the obtained wheel speed and vehicle speed, the output torque of the vehicle is reduced to better prevent slippage in different driving modes. This solves the technical problem in related technologies where anti-slip processing based on tire slip ratio is not considered for different driving modes, easily leading to the risk of vehicle slippage. This application considers anti-slip processing for different driving modes in the slip ratio-based anti-slip process, thus better preventing vehicle slippage.

[0065] Furthermore, in one embodiment, reference is made to Figure 2 , Figure 2 For this application Figure 1 A detailed flowchart of step S10. (See attached diagram.) Figure 2 As shown, the step of calculating the vehicle's slip ratio threshold based on the obtained current driving mode and road surface type includes:

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

[0067] As an example, find the correction coefficient corresponding to the vehicle's driving mode in the preset driving mode correction coefficient table, where the driving modes are divided into: Sport, ECO, and Normal. The preset driving mode correction coefficient table is shown below:

[0068]

[0069] Vehicle performance evaluation indicators can be determined based on different vehicle models, operating conditions, driving modes, and pre-set vehicle performance evaluation tables corresponding to the vehicle model. These performance indicators include wheel yaw rate performance indicators and lateral displacement performance indicators. For example, the pre-set vehicle performance evaluation table for vehicle model A is shown below:

[0070]

[0071] In the table above, "high-adhesion flat ground" represents a smooth road surface with a high coefficient of adhesion, including dry asphalt, dry cobblestone, and dry cement pavements. "Low-adhesion flat ground" represents a smooth road surface with a low coefficient of adhesion, including wet asphalt, wet cobblestone, snow, and icy surfaces. "Side-on flat ground" means that on a smooth road surface, the left and right wheels of a vehicle have different coefficients of adhesion, one higher and one lower. "Connected flat ground" means that on a smooth road surface, the front and rear wheels of a vehicle have different coefficients of adhesion, one higher and one lower.

[0072] The preset standard correction coefficient is adjusted based on the vehicle's actual performance values ​​and preset vehicle performance indicators. When the detected actual performance value of the vehicle is outside the preset range in the table above, the preset standard correction coefficient 1 is modified. For each additional actual performance value outside the preset range, the preset standard correction coefficient 1 is increased by 0.1 or decreased by 0.1. If the detected driving mode is Sport, it is increased by 0.1; if the detected driving mode is ECO, it is decreased by 0.1. For example, when the driving mode of a Type A vehicle is detected as ECO, the actual yaw rate is 5 degrees / second, the lateral displacement is 0.4 meters, and the operating condition is flat ground with high adhesion, then one of the actual performance values ​​is outside the preset range, so the preset standard correction coefficient is increased by 0.1, i.e., the correction coefficient is modified to 1.1. For example, when it is detected that the driving mode of the Type A vehicle is ECO, the actual yaw rate is 5deg / s, the lateral displacement is 0.4m, and the working condition is a split road surface, if one of the actual performance values ​​is not within the preset range, the preset standard correction coefficient is reduced by 0.1, that is, the correction coefficient is 0.9.

[0073] Step S12: Based on the obtained road surface type and the preset adhesion coefficient-slip ratio mathematical model, the optimal slip ratio is obtained;

[0074] As an example, based on the obtained road surface type, the corresponding road surface parameter is found in the preset road surface parameter table, and the road surface parameter is substituted into the preset adhesion coefficient-slip ratio mathematical model to obtain the optimal slip ratio.

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

[0076] As an example, road surface parameters are obtained based on the acquired road surface type and a pre-set road surface parameter table. The road surface type includes icy road surface, snow-covered road surface, wet cobblestone road surface, wet asphalt road surface, dry cement road surface, dry cobblestone road surface, and dry asphalt road surface. The pre-set road surface parameter table is shown below:

[0077]

[0078] For example, if the detected road surface type is icy, the corresponding road surface parameters c1 are 0.05, c2 are 306.39, and c3 are 0.001. Substituting these parameters into the preset adhesion coefficient-slip ratio mathematical model yields... Where u is the obtained road surface adhesion coefficient, the slip ratio corresponding to the maximum road surface adhesion coefficient in the mathematical model is 0.031, then the slip ratio of 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] As an example, the correction factor and the optimal slip ratio are substituted into the first preset formula S. i =S o *τ calculates the slip ratio threshold, where S i S is the slip ratio threshold. o The optimal slip ratio is given by τ, which is a correction factor.

[0081] In this embodiment, the correction coefficient corresponding to the driving mode is obtained according to the obtained driving mode and the preset driving mode correction coefficient table; the optimal slip ratio is calculated according to the obtained road surface type; and the slip ratio threshold value of the vehicle is calculated based on the first preset formula, the correction coefficient, and the optimal slip ratio. This solves the problem that in related technologies, the determination of whether to reduce the output torque of the vehicle is based solely on the optimal slip ratio without considering the influence of the driving mode on the output torque of the vehicle, which 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 determines whether to reduce the torque of the vehicle based on the slip ratio threshold value, which can better prevent slip in different driving modes.

[0082] Secondly, embodiments of this application also provide a control method and apparatus for improving vehicle skidding.

[0083] In one embodiment, reference is made to Figure 3 , Figure 3 This is a functional module diagram of an embodiment of the control method and apparatus for improving vehicle skidding according to this application. Figure 3 As shown, the control device for improving vehicle slippage includes:

[0084] Calculation module 01 calculates the slip ratio threshold value of the vehicle based on the current driving mode and road surface type of the vehicle.

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

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

[0087] Based on the obtained driving mode and preset driving mode correction coefficient table, obtain the correction coefficient corresponding to the driving mode;

[0088] The optimal slip ratio is derived based on the obtained road surface type and the pre-set adhesion coefficient-slip ratio mathematical model.

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

[0090] Furthermore, in one embodiment, the torque reduction module 02 is also used for:

[0091] The real-time slip ratio of the vehicle is calculated based on the obtained wheel speed and vehicle speed.

[0092] The real-time slip ratio of the vehicle is compared with the slip ratio threshold value of the vehicle during 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, the vehicle's output torque is reduced.

[0094] The functions of each module in the above-mentioned control method device for improving vehicle slippage correspond to the steps in the above-mentioned control method embodiment for improving vehicle slippage, and their functions and implementation processes will not be described in detail here.

[0095] Thirdly, embodiments of this application provide a control method and apparatus for improving vehicle skidding. The control method and apparatus for improving vehicle skidding can be a device with data processing capabilities, such as a personal computer (PC), a laptop computer, or a server.

[0096] Reference Figure 4 , Figure 4 This is a schematic diagram of the hardware structure of the control method and device for improving vehicle skidding involved in the embodiments of this application. In the embodiments of this application, the control method and device for improving vehicle skidding may include a processor, a memory, a communication interface, and a communication bus.

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

[0098] Communication interfaces include input / output (I / O) interfaces, physical interfaces, and logical interfaces used for interconnecting internal components of the control method device for improving vehicle skidding, as well as interfaces used for interconnecting the control method device for improving vehicle skidding with other devices (such as other computing devices or user equipment). Physical interfaces can be Ethernet interfaces, fiber optic interfaces, ATM interfaces, etc.; user equipment can be displays, keyboards, etc.

[0099] 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 storage, 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 a control method program for improving vehicle skidding stored in memory and execute the control method for improving vehicle skidding provided in the embodiments of this application. For example, the general-purpose processor can be a central processing unit (CPU). 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 this application, which will not be described again here.

[0101] Those skilled in the art will understand that Figure 4 The hardware structure shown does not constitute a limitation of this application and may include more or fewer components than shown, or combine certain components, or have different component arrangements.

[0102] Fourthly, embodiments of this application also provide a readable storage medium.

[0103] The present application has a readable storage medium storing a control method program for improving vehicle skidding, wherein when the control method program for improving vehicle skidding is executed by a processor, it implements the steps of the control method for improving vehicle skidding as described above.

[0104] The method implemented when the vehicle skidding control method program is executed can be referred to in various embodiments of the vehicle skidding control method of this application, and will not be repeated here.

[0105] It should be noted that the sequence numbers of the embodiments in this application are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments.

[0106] Through the above description of the embodiments, those skilled in the art can clearly understand that the methods of the above embodiments can be implemented by means of software plus necessary general-purpose hardware platforms. Of course, they can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of this 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 (such as ROM / RAM, magnetic disk, optical disk) as described above, and includes several instructions to cause a terminal device to execute the methods described in the various embodiments of this application.

[0107] The above are merely preferred embodiments of this application and do not limit the patent scope of this application. Any equivalent structural or procedural transformations made using the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this application.

Claims

1. A control method for improving vehicle slippage, characterized in that, The control method for improving vehicle slippage includes: Based on the current driving mode and road surface type of the vehicle, calculate the slip ratio threshold value of the vehicle. Based on the slip ratio threshold of the vehicle and the obtained wheel speed and vehicle speed, the output torque of the vehicle is reduced so that the vehicle can better prevent slippage in different driving modes. The step of calculating the vehicle's slip ratio threshold based on the obtained current driving mode and road surface type includes: Based on the obtained driving mode and preset driving mode correction coefficient table, obtain the correction coefficient corresponding to the driving mode; The preset standard correction coefficient is adjusted based on the actual performance value of the vehicle and the preset vehicle performance index. When the detected actual performance value of the vehicle is not within the preset range of the driving mode and preset driving mode correction coefficient table, the preset standard correction coefficient 1 is modified. For each additional actual performance value that exceeds the preset range, the preset standard correction coefficient 1 is increased by 0.1 or decreased by 0.

1. If the driving mode is detected as Sport, it is increased by 0.1; if the driving mode is detected as ECO, it is decreased by 0.

1. The optimal slip ratio is derived based on the obtained road surface type and the pre-set adhesion coefficient-slip ratio mathematical model. Based on the first preset formula, the correction coefficient, and the optimal slip ratio, the slip ratio threshold value for vehicle driving is calculated.

2. The control method for improving vehicle slippage as described in claim 1, characterized in that, The process of deriving the optimal slip ratio based on the obtained road surface type and the pre-set adhesion coefficient-slip ratio mathematical model includes: Based on the obtained road surface type and preset road surface parameter table, obtain the road surface parameters; The optimal slip ratio is derived based on the road surface parameters and the pre-set adhesion coefficient-slip ratio mathematical model.

3. The control method for improving vehicle slippage as described in claim 1, characterized in that, The step of reducing the output torque of the vehicle based on the slip ratio threshold value of the vehicle's travel, and the obtained wheel speed and vehicle speed, includes: The real-time slip ratio of the vehicle is calculated based on the obtained wheel speed and vehicle speed. The real-time slip ratio of the vehicle is compared with the slip ratio threshold value of the vehicle during driving 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.

4. The control method for improving vehicle slippage as described in claim 3, characterized in that, The step of calculating the real-time slip ratio of the vehicle based on the obtained wheel speed and vehicle speed includes: Obtain the current wheel speed and vehicle speed of the vehicle; The real-time slip ratio of the vehicle can be calculated based on the wheel speed, the vehicle speed, and the second preset formula.

5. The control method for improving vehicle slippage as described in claim 1, characterized in that, The driving modes include Sport, ECO, and Normal.

6. The control method for improving vehicle slippage as described in claim 3, characterized in that, The step of reducing the vehicle's output torque when the real-time slip ratio is greater than the slip ratio threshold includes: The target drive torque is determined based on the obtained throttle opening and the driving mode. The output torque of the vehicle is reduced based on the target driving torque.

7. A control method and apparatus for improving vehicle skidding, characterized in that, The control method device for improving vehicle slippage includes: The calculation module is used to calculate the slip ratio threshold value of the vehicle based on the current driving mode and road surface type of the vehicle. The torque reduction module is used to reduce the output torque of the vehicle based on the slip ratio threshold value of the vehicle and the obtained wheel speed and vehicle speed, so as to meet the user's experience needs for different driving modes during the vehicle anti-slip process. The step of calculating the vehicle's slip ratio threshold based on the obtained current driving mode and road surface type includes: Based on the obtained driving mode and preset driving mode correction coefficient table, obtain the correction coefficient corresponding to the driving mode; The preset standard correction coefficient is adjusted based on the actual performance value of the vehicle and the preset vehicle performance index. When the detected actual performance value of the vehicle is not within the preset range of the driving mode and preset driving mode correction coefficient table, the preset standard correction coefficient 1 is modified. For each additional actual performance value that exceeds the preset range, the preset standard correction coefficient 1 is increased by 0.1 or decreased by 0.

1. If the driving mode is detected as Sport, it is increased by 0.1; if the driving mode is detected as ECO, it is decreased by 0.

1. The optimal slip ratio is derived based on the obtained road surface type and the pre-set adhesion coefficient-slip ratio mathematical model. Based on the first preset formula, the correction coefficient, and the optimal slip ratio, the slip ratio threshold value for vehicle driving is calculated.

8. A control method and device for improving vehicle slippage, characterized in that, The device for the control method of improving vehicle skidding includes a processor, a memory, and a control method program for improving vehicle skidding stored in the memory and executable by the processor, wherein when the control method program for improving vehicle skidding is executed by the processor, it implements the steps of the control method for improving vehicle skidding as described in any one of claims 1 to 6.

9. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a control method program for improving vehicle skidding, wherein when the control method program for improving vehicle skidding is executed by a processor, it implements the steps of the control method for improving vehicle skidding as described in any one of claims 1 to 6.

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