Neutral coasting control method and device, electronic equipment and storage medium

Abstract

Embodiments of the present application relate to the technical field of vehicles, and disclose a neutral coasting control method and device, electronic equipment and a storage medium. The existing coasting strategy is designed on the one hand for general use, without considering the difference in driving habits of drivers, and the fixed strategy does not match the aggressive or conservative driving style, which is easy to cause user complaints. Although a driving behavior determination system can collect relevant data, it is not deeply integrated with the coasting control. On the other hand, the adaptability to extreme road conditions is insufficient. On low adhesion road surfaces such as wet ice and snow, the control logic that only relies on slope and turning radius parameters cannot avoid the risk of losing control. On the other hand, the condition judgment of the whole vehicle mass entering and exiting the neutral coasting is not considered, and when the load changes, the influence on the fuel economy of the whole vehicle coasting is large and cannot be ignored. The embodiments of the present application can at least alleviate the technical problems of the existing neutral coasting control strategy, such as insufficient adaptability, prominent safety hazards in extreme road conditions, and inability to accurately adapt to dynamic changes in load.

Description

Technical Field

[0001] This invention relates to the field of vehicle technology, and in particular to a method, device, electronic device, and storage medium for coasting in neutral. Background Technology

[0002] In the domestic commercial vehicle sector, the integration of automated manual transmissions (AMT) has become the mainstream development direction, and its market penetration rate continues to climb. Driven by the dual demands of fuel economy and driving safety in industries such as logistics and transportation, coasting control technology for heavy-duty trucks has been widely researched and applied.

[0003] However, existing technologies have at least the following technical shortcomings in practical applications:

[0004] First, existing coasting strategies are mostly general designs that do not consider differences in driver habits. Aggressive or conservative driving styles do not match fixed strategies, which can easily lead to user complaints. Although there are driving behavior judgment systems that can collect relevant data, they are not deeply integrated with coasting control. Second, they are not adaptable to extreme road conditions. On low-friction surfaces such as wet, slippery, icy, and snowy roads, control logic that relies solely on slope and turning radius parameters cannot avoid the risk of loss of control. In such scenarios, coasting in neutral is prone to causing safety accidents due to increased braking distance and loss of engine braking force. Finally, the overall vehicle weight does not take into account the condition judgment for entering and exiting coasting in neutral. When the load changes, the impact on the fuel economy of the vehicle during coasting is significant and cannot be ignored.

[0005] In view of this, the above-mentioned problems make it difficult for the existing coasting control technology to meet the needs of personalized adaptation, extreme road condition safety and load adaptation, thus limiting its application effect in actual complex working conditions. Summary of the Invention

[0006] The purpose of this invention is to provide a coasting control method, device, electronic device and storage medium, which aims to alleviate the technical problems of insufficient adaptability of existing coasting control strategies, prominent safety hazards in extreme road conditions and inability to accurately adapt to dynamic changes in load. At least through the synergistic optimization of personalized adaptation of driving habits, safety control in extreme road conditions and dynamic load correction, the invention achieves a unity of coasting safety, economy and scenario adaptability.

[0007] To address the aforementioned technical problems, in a first aspect, the present invention provides a coasting control method in neutral gear, comprising at least:

[0008] The system collects at least the throttle opening change rate, braking frequency, and shift interval duration of the vehicle, and determines the coasting control weight under the corresponding vehicle driving level based at least on the throttle opening change rate, braking frequency, and shift interval duration. Then, it adjusts the vehicle speed for entering and exiting coasting in neutral, the clutch disengagement delay time after releasing the throttle, and the transmission disengagement waiting time based at least on the coasting control weight, so as to achieve dynamic adaptation of the coasting strategy to the vehicle driving level.

[0009] At least wheel slip signals are collected, road surface adhesion coefficient is calculated based on the wheel slip signals, and the corresponding coasting permission level is matched based on the road surface adhesion coefficient. Then, the coasting strategy and the road surface adhesion coefficient are dynamically adapted based on the changes in the road surface adhesion coefficient and the coasting permission level.

[0010] At least vehicle load and slope information are collected, and at least based on the vehicle load and slope information, the neutral coasting intervention speed, neutral coasting exit speed and neutral coasting intervention waiting time under the preset maximum fuel saving rate are determined, so as to achieve dynamic adaptation of coasting strategy with load, slope and fuel saving rate.

[0011] Optionally, when the road surface adhesion coefficient meets the first preset condition, the gliding permission level is determined to be the first preset level, and then a normal gliding strategy is executed.

[0012] Optionally, when the road surface adhesion coefficient meets the second preset condition, the coasting permission level is determined to be the second preset level, and then the first coasting strategy is executed, at least adjusting the weighting coefficient of the speed limit for coasting in neutral to the range of the first coefficient threshold, and adjusting the weighting coefficient of the confirmation time limit for the action of the accelerator pedal and the brake pedal to the range of the second coefficient threshold.

[0013] Optionally, when the road surface adhesion coefficient meets the third preset condition, the coasting permission level is determined to be the third preset level, and then the second coasting strategy is executed, at least prohibiting coasting in neutral.

[0014] Optionally, when the road surface adhesion coefficient meets the condition of coefficient change, at least a forced exit from neutral coasting command is triggered, and the transmission is controlled to shift into gear to restore power in order to avoid driving risks.

[0015] Optionally, it may also include at least:

[0016] During vehicle operation, at least the fuel consumption per unit distance coasting within a set time after each start of coasting in neutral should be calculated, and sample data should be generated after each effective coasting in neutral.

[0017] The sample data is preprocessed to at least remove abnormal data and retain valid samples, and then the load and slope dimensions are cross-combined to form several load-slope working condition grid units, each working condition grid unit corresponding to a fixed load range and slope range.

[0018] For each of the aforementioned working condition grid cells, with the minimum fuel consumption as the optimization objective, the optimal slope threshold and the optimal intervention waiting time threshold for coasting under the corresponding working condition are selected and used as the output values ​​of the corresponding working condition grid cell in the load-coasting fuel consumption MAP, thereby establishing the corresponding relationship within the working condition grid cell;

[0019] The weight coefficients of grid cells under different working conditions are calibrated, and all grid cells under different working conditions and their corresponding optimal thresholds are integrated to generate a complete load-slope-optimal coasting threshold MAP table, so as to achieve accurate adaptation to load changes during vehicle operation.

[0020] Optionally, the sample data includes at least the real-time total load, current road gradient, current coasting gradient threshold, clutch waiting time threshold, gear disengagement waiting time threshold, and the fuel consumption per unit distance coasting.

[0021] Based on the same concept, in a second aspect, the present invention also provides a coasting control device for performing the coasting control method described in any one of the first aspects;

[0022] The coasting control device includes at least:

[0023] The first adaptation module is used to collect at least the throttle opening change rate, braking frequency and shift interval duration of the vehicle, and determine the coasting control weight under the corresponding vehicle driving level based at least on the throttle opening change rate, the braking frequency and the shift interval duration. Then, it adjusts the vehicle speed for entering and exiting coasting in neutral, the clutch disengagement delay time after releasing the throttle and the transmission disengagement waiting time based at least on the coasting control weight, so as to achieve dynamic adaptation of the coasting strategy and the vehicle driving level.

[0024] The second adaptation module is used to at least collect wheel slip signals, calculate the road surface adhesion coefficient based on the wheel slip signals, match the corresponding coasting permission level based on the road surface adhesion coefficient, and then realize the dynamic adaptation of the coasting strategy and the road surface adhesion coefficient based on the changes in the road surface adhesion coefficient and the coasting permission level.

[0025] The third adaptation module is used to collect at least vehicle load and slope information, and to determine the neutral coasting intervention speed, neutral coasting exit speed and neutral coasting intervention waiting time under the preset maximum fuel saving rate based at least on the vehicle load and slope information, so as to realize the dynamic adaptation of coasting strategy with load, slope and fuel saving rate.

[0026] Based on the same concept, in a third aspect, the present invention also provides an electronic device, including a memory and a processor, the memory storing a computer program executable on the processor, the processor executing the program to implement the steps of the neutral coasting control method according to any one of the first aspects.

[0027] Based on the same concept, in a fourth aspect, the present invention also provides a computer-readable storage medium having a computer program stored thereon, wherein the computer program, when executed by a processor, implements the steps of the neutral coasting control method described in any one of the first aspects.

[0028] The technical solution provided by this invention firstly collects at least the vehicle's throttle opening change rate, braking frequency, and shift interval duration, and determines the coasting control weights for the corresponding vehicle driving level based at least on the throttle opening change rate, braking frequency, and shift interval duration. Then, it adjusts the coasting entry and exit speeds, clutch disengagement delay time after releasing the throttle, and transmission disengagement waiting time based at least on the coasting control weights to achieve dynamic adaptation between the coasting strategy and the vehicle driving level. Further, it collects at least wheel slip signals, calculates the road surface adhesion coefficient based at least on the wheel slip signals, and matches the corresponding coasting permission level based at least on the road surface adhesion coefficient. Then, it achieves dynamic adaptation between the coasting strategy and the road surface adhesion coefficient based at least on the changes in the road surface adhesion coefficient and the coasting permission level. Finally, it collects at least vehicle load and gradient information, and determines the coasting intervention speed, coasting exit speed, and coasting intervention waiting time for the preset maximum fuel-saving rate based at least on the vehicle load and gradient information to achieve dynamic adaptation between the coasting strategy and load, gradient, and fuel-saving rate.

[0029] Therefore, the embodiments of the present invention achieve a balance between safety, economy and scenario adaptability of coasting in neutral by at least through the synergistic optimization of personalized driving habit adaptation, extreme road condition safety control and load dynamic correction. This helps to alleviate the technical problems of insufficient adaptability of existing coasting in neutral control strategies, prominent safety hazards in extreme road conditions and inability to accurately adapt to dynamic load changes. Attached Figure Description

[0030] Figure 1 This is a flowchart of a coasting control method in neutral provided by an embodiment of the present invention;

[0031] Figure 2 This is a schematic diagram of the structure of a coasting control device in neutral provided in an embodiment of the present invention;

[0032] Figure 3 This is a schematic diagram of the structure of an electronic device provided in an embodiment of the present invention. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of this application clearer, the application will be further described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0034] The terminology used in the embodiments of this application is for the purpose of describing particular embodiments only and is not intended to limit the application. The singular forms “a,” “said,” and “the” used in the embodiments of this application and the appended claims are also intended to include the plural forms, and “multiple” generally includes at least two unless the context clearly indicates otherwise.

[0035] It should be understood that the term "and / or" used in this article is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this article generally indicates that the preceding and following related objects have an "or" relationship.

[0036] It should be understood that although the terms first, second, third, etc., may be used in the embodiments of this application, these descriptions should not be limited to these terms. These terms are only used to distinguish the descriptions. For example, first may also be referred to as second without departing from the scope of the embodiments of this application, and similarly, second may also be referred to as first.

[0037] Depending on the context, the words “if” or “suppose” as used here can be interpreted as “when” or “in response to determination” or “in response to detection.” Similarly, depending on the context, the phrases “if determination” or “if detection (of the stated condition or event)” can be interpreted as “when determination” or “in response to determination” or “when detection (of the stated condition or event)” or “in response to detection (of the stated condition or event).”

[0038] It should also be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that an article or device that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such an article or device. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the article or device that includes said element.

[0039] It should be noted that any symbols and / or numbers present in the specification that are not marked in the accompanying drawings are not reference numerals.

[0040] Figure 1 This is a flowchart of a neutral coasting control method provided by an embodiment of the present invention. This embodiment is applicable to at least any vehicle's neutral coasting control optimization scenario. The neutral coasting control method can be, but is not limited to, executed by the neutral coasting control device in this embodiment of the present invention as the execution subject, which can be implemented in software and / or hardware. Figure 1 As shown, the neutral coasting control method includes at least the following steps:

[0041] S1. Collect at least the vehicle's throttle opening change rate, braking frequency, and shift interval duration, and determine the coasting control weights for the corresponding vehicle driving level based at least on the throttle opening change rate, braking frequency, and shift interval duration. Then, adjust the vehicle speed for entering and exiting coasting in neutral, the clutch disengagement delay time after releasing the throttle, and the transmission disengagement waiting time based at least on the coasting control weights to achieve dynamic adaptation between the coasting strategy and the vehicle driving level.

[0042] Specifically, the transmission control unit (TCU) can collect driver operation signals such as throttle opening change rate, braking frequency, and shift interval duration. Based on the above data, a driving style model library containing three levels of "aggressive, neutral, and conservative" can be established (for example, within 1 hour, different average throttle opening change rates, braking frequencies, and shift interval durations correspond to different percentage scores, and the corresponding weights of the three can be 0.4, 0.3, and 0.3, respectively. The total score is calculated, and if the total score is greater than 70, it is considered aggressive; if the total score is less than 50, it is considered conservative; and if it is between 50 and 70, it is considered neutral). Differentiated weight coefficients are configured for different levels of driving habit labels.

[0043] Specifically, the weighting coefficient for the aggressive level can be set to 1.1, the weighting coefficient for the neutral level can be set to 1.0, and the weighting coefficient for the conservative level can be set to 0.9. Using this driving habit label as the core weighting factor, preset internal parameters such as the vehicle speed for entering and exiting coasting in neutral, the clutch disengagement delay time after releasing the accelerator, and the transmission shift-off waiting time are weighted and judged [for example, if the clutch disengagement delay time after releasing the accelerator is set to 20ms, and a driver's driving style is conservative, then the clutch disengagement delay time after releasing the accelerator is updated using (20 / 0.9)ms], dynamically adjusting the coasting control threshold. Simultaneously, the TCU can automatically iteratively update the above threshold parameters based on the driver's long-term operating data, achieving dynamic adaptation between the coasting strategy and driving style.

[0044] S2. At least collect wheel slip signals, calculate the road surface adhesion coefficient based on the wheel slip signals, match the corresponding coasting permission level based on the road surface adhesion coefficient, and then realize the dynamic adaptation of the coasting strategy and the road surface adhesion coefficient based on the changes in the road surface adhesion coefficient and the coasting permission level.

[0045] Specifically, wheel slip ratio signals (i.e., the aforementioned wheel slip signals) can be collected using ABS wheel speed sensors or ESP systems. The road surface adhesion coefficient can be analyzed and calculated in real time using slip ratio data (obtained through signal processing of the wheel slip ratio signals). Based on the road surface adhesion coefficient, it can be divided into three levels: high, medium, and low (the road surface adhesion coefficient can be determined according to the slip ratio of the wheels on the same side, such as the left and right front wheels. When the slip ratio is greater than 20%, the level is low adhesion; less than 5% is considered high adhesion; and 5% to 20% is considered medium adhesion), and differentiated skidding strategies can be matched accordingly.

[0046] In one specific implementation, optionally, when the road surface adhesion coefficient meets the first preset condition, the coasting permission level is determined to be the first preset level, and then the conventional coasting strategy is executed.

[0047] In another specific implementation, optionally, when the road surface adhesion coefficient meets the second preset condition, the coasting permission level is determined to be the second preset level, and then the first coasting strategy is executed, at least adjusting the weight coefficient of the speed limit for neutral coasting intervention and exit to the first coefficient threshold range, and adjusting the weight coefficient of the time limit for the action confirmation of the accelerator pedal and brake pedal to the second coefficient threshold range.

[0048] In another specific implementation, optionally, when the road surface adhesion coefficient meets the third preset condition, the coasting permission level is determined to be the third preset level, and then the second coasting strategy is executed, at least prohibiting coasting in neutral.

[0049] In another specific implementation, optionally, when the road surface adhesion coefficient meets the coefficient change condition, at least a forced exit from neutral coasting command is triggered, and the transmission is controlled to shift into gear to restore power, so as to avoid driving risks.

[0050] More specifically, under high adhesion coefficient conditions (corresponding to the road surface adhesion coefficient meeting the first preset condition), a conventional coasting strategy is executed, with a weighting coefficient set to 1.0; under medium adhesion coefficient conditions (corresponding to the road surface adhesion coefficient meeting the second preset condition), coasting permission is restricted, and the weighting coefficient for limiting the speed of neutral coasting intervention and exit is adjusted to 1.5 (i.e., the aforementioned first coefficient threshold range; a specific value is shown here, but in other embodiments, it can also be configured as a numerical range), while shortening the confirmation time of the accelerator and brake pedal actions (for example, the weighting coefficient for limiting the confirmation time can also be adjusted to 1.6~1.7); under low adhesion coefficient conditions (corresponding to the aforementioned road surface adhesion coefficient meeting the third preset condition), neutral coasting is directly prohibited; when a sudden change in the road surface adhesion coefficient is detected (corresponding to the aforementioned road surface adhesion coefficient meeting the coefficient change condition, for example, the change in the slip ratio between the left and right front wheels corresponding to the road surface adhesion coefficient within a certain sampling period exceeds 10%), a forced exit from neutral coasting command is immediately triggered, controlling the transmission to shift gears to restore power and avoid driving risks.

[0051] S3. Collect at least vehicle load and slope information, and determine at least based on the vehicle load and slope information the neutral coasting intervention speed, neutral coasting exit speed and neutral coasting intervention waiting time under the preset maximum fuel saving rate, so as to achieve dynamic adaptation of coasting strategy with load, slope and fuel saving rate.

[0052] The total vehicle load (i.e., the aforementioned vehicle load) can be obtained through suspension pressure sensors, axle load sensors, or driver input. The TCU can pre-store specific parameters for neutral coasting intervention, exit speed, and intervention waiting time for different loads and slopes under the maximum fuel-saving target.

[0053] In yet another specific implementation, the coasting control method may optionally include at least:

[0054] During vehicle operation, at least the fuel consumption per unit distance coasting within a set time after each start of coasting in neutral should be calculated, and sample data should be generated after each effective coasting in neutral.

[0055] The sample data is preprocessed to at least remove outlier data and retain valid samples. Then, the load and slope dimensions are cross-combined to form several load-slope working condition grid units, each working condition grid unit corresponding to a fixed load range and slope range.

[0056] For each working condition grid cell, with the minimum fuel consumption as the optimization objective, the optimal slope threshold and the optimal intervention waiting time threshold for coasting under the corresponding working condition are selected and used as the output values ​​of the corresponding working condition grid cell in the load-coasting fuel consumption MAP, thereby establishing the corresponding relationship within the working condition grid cell;

[0057] The weight coefficients of grid cells under different working conditions are calibrated, and all grid cells under different working conditions and their corresponding optimal thresholds are integrated to generate a complete load-slope-optimal coasting threshold MAP table, so as to achieve accurate adaptation to load changes during vehicle operation.

[0058] In another specific implementation, the sample data may optionally include at least the real-time total load, current road gradient, current coasting gradient threshold, clutch waiting time threshold, gear disengagement waiting time threshold, and fuel consumption per unit distance coasting.

[0059] More specifically, the validity of the sample data is assessed. For example, data with an absolute value of gradient change greater than 1% or a load change greater than 500kg, which does not reflect actual driving conditions, must be deleted. Vehicle weight and gradient are used as two inputs. For example, vehicle weight is divided into categories such as below 20t, 20t-25t, 25t-30t, and so on, with the highest unit being greater than 50t. Gradient is divided into ranges such as less than -6%, -6%--4%, -4%--2%, -2%-0%, and 0%-1.5%. This results in at least 8*5=40 units. Valid data is compared, and fuel consumption is used as the target to find the optimal control threshold in each unit grid. For example, if there are 100 data points with a weight of 35t-40t and a gradient of -2%-0%, they are sorted by fuel consumption to find the most fuel-efficient one, such as a coasting gradient threshold of -1.5%, a clutch waiting time of 500ms, and a shift disengagement waiting time of 200ms. The parameter that saves the most fuel is taken as the optimal value of the grid cell. As for why different cells need to optimize the weight coefficient, it is to take into account the characteristics of adjacent working conditions to improve performance and prevent parameter abrupt changes. For example, the weight coefficient of this grid (the weight coefficients of quality and slope can be the same) is 0.85, the weight of adjacent grid is 0.25, the weight of two adjacent grids is 0.1, the weight of three adjacent grids is 0.05, and the weight of more than three adjacent grids is 0.

[0060] The technical solution provided in this embodiment firstly collects at least the vehicle's throttle opening change rate, braking frequency, and shift interval duration, and determines the coasting control weights under the corresponding vehicle driving level based at least on the throttle opening change rate, braking frequency, and shift interval duration. Then, it adjusts the vehicle speed for entering and exiting coasting in neutral, the clutch disengagement delay time after releasing the throttle, and the transmission disengagement waiting time based at least on the coasting control weights to achieve dynamic adaptation between the coasting strategy and the vehicle driving level. Furthermore, it collects at least wheel slip signals, calculates the road surface adhesion coefficient based at least on the wheel slip signals, and matches the corresponding coasting permission level based at least on the road surface adhesion coefficient. Then, it achieves dynamic adaptation between the coasting strategy and the road surface adhesion coefficient based at least on the changes in the road surface adhesion coefficient and the coasting permission level. Finally, it collects at least vehicle load and slope information, and determines the vehicle speed for entering coasting in neutral, the vehicle speed for exiting coasting in neutral, and the waiting time for entering coasting in neutral under the preset maximum fuel-saving rate based at least on the vehicle load and slope information to achieve dynamic adaptation between the coasting strategy and the load, slope, and fuel-saving rate.

[0061] Therefore, this embodiment achieves a balance between safety, economy, and scenario adaptability of coasting in neutral by at least through the synergistic optimization of personalized driving habit adaptation, extreme road condition safety control, and dynamic load correction. This helps to alleviate the technical problems of insufficient adaptability of existing coasting control strategies, prominent safety hazards in extreme road conditions, and inability to accurately adapt to dynamic load changes.

[0062] It should be noted that the present invention can achieve at least the following beneficial effects:

[0063] 1. Significantly improved personalization and adaptability, enhancing driving comfort;

[0064] 2. Improve driving safety under extreme road conditions;

[0065] 3. Dynamic load matching determines the conditions for neutral coasting intervention and disengagement, improving fuel economy.

[0066] Figure 2 This is a schematic diagram of a neutral coasting control device provided in an embodiment of the present invention. This embodiment is applicable to at least any vehicle's neutral coasting control optimization scenario. The neutral coasting control device can be implemented using software and / or hardware. Figure 2 As shown, the coasting control device in neutral includes at least:

[0067] The first adaptation module 110 is used to collect at least the throttle opening change rate, braking frequency and shift interval duration of the vehicle, and determine the coasting control weight under the corresponding vehicle driving level based at least on the throttle opening change rate, braking frequency and shift interval duration, and then adjust the vehicle speed for entering and exiting coasting in neutral, the clutch disengagement delay time after releasing the throttle and the transmission disengagement waiting time based at least on the coasting control weight, so as to achieve dynamic adaptation between the coasting strategy and the vehicle driving level.

[0068] The second adaptation module 120 is used to at least collect wheel slip signals, calculate the road surface adhesion coefficient based on the wheel slip signals, match the corresponding coasting permission level based on the road surface adhesion coefficient, and then realize the dynamic adaptation of the coasting strategy and the road surface adhesion coefficient based on the changes in the road surface adhesion coefficient and the coasting permission level.

[0069] The third adaptation module 130 is used to collect at least vehicle load and slope information, and to determine at least the neutral coasting intervention speed, neutral coasting exit speed and neutral coasting intervention waiting time under the preset maximum fuel saving rate based on the vehicle load and slope information, so as to realize the dynamic adaptation of coasting strategy with load, slope and fuel saving rate.

[0070] Optionally, the second adapter module 120 is specifically used for at least:

[0071] When the road surface adhesion coefficient meets the first preset condition, the coasting permission level is determined to be the first preset level, and then the normal coasting strategy is executed.

[0072] Optionally, the second adapter module 120 is specifically used for at least:

[0073] When the road surface adhesion coefficient meets the second preset condition, the coasting permission level is determined to be the second preset level, and then the first coasting strategy is executed. At least the weight coefficient of the speed limit for coasting in neutral and exiting is adjusted to the first coefficient threshold range, and the weight coefficient of the time limit for the confirmation of the action of the accelerator pedal and brake pedal is adjusted to the second threshold range.

[0074] Optionally, the second adapter module 120 is specifically used for at least:

[0075] When the road surface adhesion coefficient meets the third preset condition, the coasting permission level is determined to be the third preset level, and then the second coasting strategy is executed, at least prohibiting coasting in neutral.

[0076] Optionally, the second adapter module 120 is specifically used for at least:

[0077] When the road surface adhesion coefficient meets the condition of sudden change, at least the command to force disengage from neutral coasting is triggered, and the transmission is controlled to shift into gear to restore power in order to avoid driving risks.

[0078] Optionally, it may also include at least a runtime optimization module 140;

[0079] Optimization module 140 is used at least for:

[0080] During vehicle operation, at least the fuel consumption per unit distance coasting within a set time after each start of coasting in neutral should be calculated, and sample data should be generated after each effective coasting in neutral.

[0081] The sample data is preprocessed to at least remove outlier data and retain valid samples. Then, the load and slope dimensions are cross-combined to form several load-slope working condition grid units, each working condition grid unit corresponding to a fixed load range and slope range.

[0082] For each working condition grid cell, with the minimum fuel consumption as the optimization objective, the optimal slope threshold and the optimal intervention waiting time threshold for coasting under the corresponding working condition are selected and used as the output values ​​of the corresponding working condition grid cell in the load-coasting fuel consumption MAP, thereby establishing the corresponding relationship within the working condition grid cell;

[0083] The weight coefficients of grid cells under different working conditions are calibrated, and all grid cells under different working conditions and their corresponding optimal thresholds are integrated to generate a complete load-slope-optimal coasting threshold MAP table, so as to achieve accurate adaptation to load changes during vehicle operation.

[0084] Optionally, the sample data should include at least the real-time total load, current road gradient, current coasting gradient threshold, clutch waiting time threshold, gear disengagement waiting time threshold, and fuel consumption per unit distance coasting.

[0085] The technical solution provided in this embodiment firstly collects at least the throttle opening change rate, braking frequency, and shift interval duration of the vehicle through a first adaptation module, and determines the coasting control weights for the corresponding vehicle driving level based at least on the throttle opening change rate, braking frequency, and shift interval duration. Then, it adjusts the vehicle speed for entering and exiting coasting in neutral, the clutch disengagement delay time after releasing the accelerator, and the transmission disengagement waiting time based at least on the coasting control weights to achieve dynamic adaptation between the coasting strategy and the vehicle driving level. Further, the second adaptation module collects at least wheel slip information... The system calculates the road surface adhesion coefficient based at least on wheel slip signals and matches the corresponding coasting permission level based at least on the road surface adhesion coefficient. Then, it dynamically adapts the coasting strategy to the road surface adhesion coefficient based at least on the changes in the road surface adhesion coefficient and the coasting permission level. Finally, the system collects at least vehicle load and slope information through the third adaptation module and determines the neutral coasting intervention speed, neutral coasting exit speed and neutral coasting intervention waiting time under the preset maximum fuel saving rate based at least on the vehicle load and slope information. This enables dynamic adaptation of the coasting strategy to the load, slope and fuel saving rate.

[0086] Therefore, this embodiment achieves a balance between safety, economy, and scenario adaptability of coasting in neutral by at least through the synergistic optimization of personalized driving habit adaptation, extreme road condition safety control, and dynamic load correction. This helps to alleviate the technical problems of insufficient adaptability of existing coasting control strategies, prominent safety hazards in extreme road conditions, and inability to accurately adapt to dynamic load changes.

[0087] This embodiment provides an electronic device. Figure 3 This is a schematic diagram of the structure of an electronic device provided in an embodiment of the present invention. See also: Figure 3 The electronic device 1000 includes a processor 1001 and a memory 1002. The memory 1002 stores computer-readable instructions. When the computer-readable instructions are executed by the processor 1001, the steps in any of the above-described neutral coasting control methods are performed. Through the above technical solution, the processor 1001 and the memory 1002 are interconnected and communicate with each other via a communication bus and / or other forms of connection mechanisms (not shown). The memory 1002 stores a processor-executable computer program. When the electronic device 1000 is running, the processor 1001 executes the computer program to perform the neutral coasting control method in any of the optional implementations of the above embodiments, to at least achieve the following functions: at least collecting the vehicle's throttle opening change rate, braking frequency, and shift interval duration; and at least determining the coasting control weight under the corresponding vehicle driving level based on the throttle opening change rate, braking frequency, and shift interval duration; and then at least according to the coasting control weight, controlling the entry and exit of the vehicle in neutral coasting. The system adjusts the speed, clutch disengagement delay after releasing the accelerator, and transmission shift-off waiting time to achieve dynamic adaptation of the coasting strategy to the vehicle's driving level; it collects at least wheel slip signals, calculates the road adhesion coefficient based on the wheel slip signals, and matches the corresponding coasting permission level based on the road adhesion coefficient, thereby achieving dynamic adaptation of the coasting strategy to the road adhesion coefficient based on the changes in the road adhesion coefficient and the coasting permission level; it collects at least vehicle load and gradient information, and determines the neutral coasting engagement speed, neutral coasting disengagement speed, and neutral coasting engagement waiting time at the preset maximum fuel-saving rate based on the vehicle load and gradient information, thereby achieving dynamic adaptation of the coasting strategy to load, gradient, and fuel-saving rate.

[0088] This embodiment provides a computer-readable storage medium storing a computer program. When executed by a processor, the program implements the neutral coasting control method provided in all embodiments of this application: at least collecting the vehicle's throttle opening change rate, braking frequency, and shift interval duration; determining the coasting control weights for the corresponding vehicle driving level based at least on the throttle opening change rate, braking frequency, and shift interval duration; and then adjusting the vehicle speed for entering and exiting neutral coasting, the clutch disengagement delay time after releasing the throttle, and the transmission disengagement waiting time based at least on the coasting control weights, so as to achieve a coasting strategy that is compatible with the vehicle's coasting performance. Dynamic adaptation of driving level; at least collect wheel slip signals, calculate the road surface adhesion coefficient based on the wheel slip signals, and match the corresponding coasting permission level based on the road surface adhesion coefficient. Then, at least according to the change of the road surface adhesion coefficient and the coasting permission level, achieve dynamic adaptation of coasting strategy and road surface adhesion coefficient; at least collect vehicle load and slope information, and at least according to the vehicle load and slope information, determine the neutral coasting intervention speed, neutral coasting exit speed and neutral coasting intervention waiting time under the preset maximum fuel saving rate, so as to achieve dynamic adaptation of coasting strategy with load, slope and fuel saving rate.

[0089] Any combination of one or more computer-readable media may be used. A computer-readable medium can be a computer-readable signal medium or a computer-readable storage medium. A computer-readable storage medium can be, for example—but not limited to—an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination thereof. More specific examples (a non-exhaustive list) of computer-readable storage media include: an electrical connection having one or more wires, a portable computer disk, a hard disk, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fiber, portable compact disk read-only memory (CD-ROM), optical storage device, magnetic storage device, or any suitable combination thereof. In this document, a computer-readable storage medium can be any tangible medium that contains or stores a program that can be used by or in connection with an instruction execution system, apparatus, or device.

[0090] Computer-readable signal media may include data signals propagated in baseband or as part of a carrier wave, carrying computer-readable program code. Such propagated data signals may take various forms, including—but not limited to—electromagnetic signals, optical signals, or any suitable combination thereof. Computer-readable signal media may also be any computer-readable medium other than computer-readable storage media, capable of transmitting, propagating, or transmitting programs for use by or in connection with an instruction execution system, apparatus, or device.

[0091] The program code contained on a computer-readable medium may be transmitted using any suitable medium, including—but not limited to—wireless, wire, optical fiber, RF, etc., or any suitable combination thereof.

[0092] Computer program code for performing the operations of this invention can be written in one or more programming languages ​​or a combination thereof. Programming languages ​​include object-oriented programming languages—such as Java, Smalltalk, and C++—as well as conventional procedural programming languages—such as the "C" language or similar programming languages. The program code can be executed entirely on the user's computer, partially on the user's computer, as a standalone software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In cases involving remote computers, the remote computer can be connected to the user's computer via any type of network—including a local area network (LAN) or a wide area network (WAN)—or can be connected to an external computer (e.g., via the Internet using an Internet service provider).

[0093] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A coasting control method in neutral gear, characterized in that, At least including: The system collects at least the throttle opening change rate, braking frequency, and shift interval duration of the vehicle, and determines the coasting control weight under the corresponding vehicle driving level based at least on the throttle opening change rate, braking frequency, and shift interval duration. Then, it adjusts the vehicle speed for entering and exiting coasting in neutral, the clutch disengagement delay time after releasing the throttle, and the transmission disengagement waiting time based at least on the coasting control weight, so as to achieve dynamic adaptation of the coasting strategy to the vehicle driving level. At least wheel slip signals are collected, road surface adhesion coefficient is calculated based on the wheel slip signals, and the corresponding coasting permission level is matched based on the road surface adhesion coefficient. Then, the coasting strategy and the road surface adhesion coefficient are dynamically adapted based on the changes in the road surface adhesion coefficient and the coasting permission level. At least vehicle load and slope information are collected, and at least based on the vehicle load and slope information, the neutral coasting intervention speed, neutral coasting exit speed and neutral coasting intervention waiting time under the preset maximum fuel saving rate are determined, so as to achieve dynamic adaptation of coasting strategy with load, slope and fuel saving rate.

2. The coasting control method in neutral gear according to claim 1, characterized in that, When the road surface adhesion coefficient meets the first preset condition, the gliding permission level is determined to be the first preset level, and then the normal gliding strategy is executed.

3. The coasting control method in neutral gear according to claim 1, characterized in that, When the road surface adhesion coefficient meets the second preset condition, the coasting permission level is determined to be the second preset level, and then the first coasting strategy is executed. At least the weighting coefficient of the speed limit for coasting in neutral and exiting is adjusted to the first coefficient threshold range, and the weighting coefficient of the time limit for the confirmation of the action of the accelerator pedal and brake pedal is adjusted to the second threshold range.

4. The coasting control method in neutral gear according to claim 1, characterized in that, When the road surface adhesion coefficient meets the third preset condition, the coasting permission level is determined to be the third preset level, and then the second coasting strategy is executed, at least prohibiting coasting in neutral.

5. The coasting control method in neutral gear according to claim 1, characterized in that, When the road surface adhesion coefficient meets the condition of sudden change, at least the command to force disengage from neutral coasting is triggered, and the transmission is controlled to shift into gear to restore power in order to avoid driving risks.

6. The coasting control method in neutral gear according to claim 1, characterized in that, It also includes at least: During vehicle operation, at least the fuel consumption per unit distance coasting within a set time after each start of coasting in neutral should be calculated, and sample data should be generated after each effective coasting in neutral. The sample data is preprocessed to at least remove abnormal data and retain valid samples, and then the load and slope dimensions are cross-combined to form several load-slope working condition grid units, each working condition grid unit corresponding to a fixed load range and slope range. For each of the aforementioned working condition grid cells, with the minimum fuel consumption as the optimization objective, the optimal slope threshold and the optimal intervention waiting time threshold for coasting under the corresponding working condition are selected and used as the output values ​​of the corresponding working condition grid cell in the load-coasting fuel consumption MAP, thereby establishing the corresponding relationship within the working condition grid cell; The weight coefficients of grid cells under different working conditions are calibrated, and all grid cells under different working conditions and their corresponding optimal thresholds are integrated to generate a complete load-slope-optimal coasting threshold MAP table, so as to achieve accurate adaptation to load changes during vehicle operation.

7. The coasting control method in neutral gear according to claim 6, characterized in that, The sample data includes at least the real-time total load, current road gradient, current coasting gradient threshold, clutch waiting time threshold, gear disengagement waiting time threshold, and the fuel consumption per unit distance coasting.

8. A coasting control device for performing the coasting control method according to any one of claims 1-7; The coasting control device includes at least: The first adaptation module is used to collect at least the throttle opening change rate, braking frequency and shift interval duration of the vehicle, and determine the coasting control weight under the corresponding vehicle driving level based at least on the throttle opening change rate, the braking frequency and the shift interval duration. Then, it adjusts the vehicle speed for entering and exiting coasting in neutral, the clutch disengagement delay time after releasing the throttle and the transmission disengagement waiting time based at least on the coasting control weight, so as to achieve dynamic adaptation of the coasting strategy and the vehicle driving level. The second adaptation module is used to at least collect wheel slip signals, calculate the road surface adhesion coefficient based on the wheel slip signals, match the corresponding coasting permission level based on the road surface adhesion coefficient, and then realize the dynamic adaptation of the coasting strategy and the road surface adhesion coefficient based on the changes in the road surface adhesion coefficient and the coasting permission level. The third adaptation module is used to collect at least vehicle load and slope information, and to determine the neutral coasting intervention speed, neutral coasting exit speed and neutral coasting intervention waiting time under the preset maximum fuel saving rate based at least on the vehicle load and slope information, so as to realize the dynamic adaptation of coasting strategy with load, slope and fuel saving rate.

9. An electronic device comprising a memory and a processor, the memory storing a computer program executable on the processor, characterized in that, When the processor executes the program, it implements the steps in the neutral coasting control method according to any one of claims 1-7.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by the processor, it implements the steps of the neutral coasting control method according to any one of claims 1-7.

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