Automobile sliding energy recovery method and system and computer program product

Abstract

The invention discloses an automobile sliding energy recovery method and system and a computer program product, and the method comprises the steps: setting a sliding energy recovery strategy of an automobile; the driving behavior data of the user is collected every time a first preset time or the automobile travels for a preset distance; acquiring a user driving habit according to the driving behavior data; and dynamically adjusting the sliding energy recovery strategy according to the driving habits of the user. According to the method, the driving habits of the user are obtained by collecting the driving behavior data of the user, the sliding energy recovery strategy is dynamically adjusted according to the driving habits of the user, it is ensured that the automobile has high energy recovery efficiency in the sliding energy recovery state, and the driving experience of the user in the state is improved.

Description

Technical Field

[0001] The present invention relates to the field of automobile technology, and in particular to an automobile coasting energy recovery method, system and computer program product. Background Art

[0002] Coasting energy recovery is an important technology in new energy vehicles. It allows the car to recover kinetic energy when decelerating or coasting, convert it into electrical energy and store it in the battery, thereby improving energy utilization efficiency and increasing the car's range.

[0003] However, the design and implementation of the coasting energy recovery system needs to comprehensively consider driving safety, comfort, and the cost and complexity of the system. Too strong energy recovery may cause the car to decelerate too quickly, affecting comfort, while too weak recovery will weaken the energy recovery effect and affect safety.

[0004] At present, the energy recovery intensity of a car is usually set in the following way:

[0005] Method 1: Driving mode selection: Many new energy vehicles provide different driving modes, such as economic mode (ECO) or normal mode (NORMAL). In economic mode, energy recovery is usually set to be stronger to maximize energy recovery efficiency.

[0006] Method 2: Energy recovery level adjustment: Some cars allow the driver to manually adjust the intensity of energy recovery through the car settings menu or using specific controls (such as shift paddles). In this way, the driver can choose the energy recovery level according to driving habits and road conditions.

[0007] Method 3: Continuous adjustment of energy recovery: Some cars allow the driver to add personal preferences between strong and weak energy recovery gears through the settings menu.

[0008] However, all three methods have disadvantages. Method 1 and method 2 can only be selected according to the fixed gears that have been set for the car. Such selection methods are difficult to adapt to the driving needs of all users. Although method 3 allows users to make independent choices, it is often based on the user's subjective feelings. It is difficult to improve the recycling efficiency while satisfying the user's comfort. Summary of the invention

[0009] The purpose of the present invention is to provide a method, system and computer program product for automobile coasting energy recovery, aiming to solve the problem in the prior art that the energy recovery efficiency and the user's driving experience cannot be ensured simultaneously when the automobile is in a coasting energy recovery state.

[0010] In order to solve the above technical problems, the present invention is implemented by the following technical solutions: providing a vehicle coasting energy recovery method, comprising:

[0011] Set the car's coasting energy recovery strategy;

[0012] After each first preset time or each time the car travels a preset distance, the user's driving behavior data is collected;

[0013] Acquiring a user's driving habits according to the driving behavior data;

[0014] The coasting energy recovery strategy is dynamically adjusted according to the user's driving habits.

[0015] Furthermore, the setting of the vehicle's coasting energy recovery strategy includes:

[0016] Within a preset time period, obtaining speed information and deceleration information recorded every second preset time when the vehicle is in a coasting energy recovery state;

[0017] Establishing a speed and deceleration coordinate system according to the speed information and deceleration information;

[0018] Setting a deceleration interval according to the deceleration information;

[0019] According to the speed and deceleration coordinate system and the deceleration interval, an energy recovery boundary curve S is obtained through continuous smoothing;

[0020] The coasting energy recovery strategy of the vehicle is set according to the energy recovery boundary curve S.

[0021] Furthermore, the step of obtaining the energy recovery boundary curve S according to the speed and deceleration coordinate system and the deceleration interval through continuous smoothing includes:

[0022] In the speed and deceleration coordinate system, take a deceleration section corresponding to a certain section ΔV, and the deceleration increases from small to large to the boundary of the deceleration interval to obtain the sliding deceleration value a corresponding to the deceleration section. i ;

[0023] Continuously obtain all the sliding deceleration values ​​a corresponding to the vehicle speed reaching the maximum value from 0 i , such as a0, a1, ..., a n-1 、a n , according to the sliding deceleration value a i The corresponding sliding deceleration value a is formed at different vehicle speeds i Discrete points;

[0024] According to the coasting deceleration value a i The discrete points form a smooth curve S.

[0025] Furthermore, the user's driving behavior data includes:

[0026] Accelerator pedal opening, brake pedal opening, vehicle speed V, vehicle deceleration a 减 .

[0027] Furthermore, obtaining the user's driving habits based on the driving behavior data includes:

[0028] determining whether the vehicle is in a coasting energy recovery state according to the accelerator pedal opening and the brake pedal opening;

[0029] The user vehicle speed information and the user vehicle deceleration information recorded every second preset time when the vehicle is in a coasting energy recovery state are obtained.

[0030] Further, judging whether the vehicle is in a coasting energy recovery state according to the accelerator pedal opening and the brake pedal opening includes:

[0031] When the accelerator pedal opening is less than a preset opening and the brake pedal opening is zero, the vehicle is in a coasting energy recovery state.

[0032] Furthermore, dynamically adjusting the coasting energy recovery strategy according to the user's driving habits includes:

[0033] Establishing a user vehicle speed and user vehicle deceleration coordinate system according to the user vehicle speed information and the user vehicle deceleration information;

[0034] Setting a user vehicle deceleration interval according to the user vehicle deceleration information;

[0035] According to the user vehicle speed and the user vehicle deceleration coordinate system and the user vehicle deceleration interval, a user energy recovery boundary curve S′ is obtained through continuous smoothing processing;

[0036] The coasting energy recovery strategy of the automobile user is set according to the user energy recovery boundary curve S′.

[0037] Furthermore, the gliding energy recovery strategy includes:

[0038] Under normal conditions, the maximum deceleration provided by the coasting energy recovery strategy is a c ;

[0039] In the case of an uphill slope, the maximum deceleration a provided by the coasting energy recovery strategy is 上 :a 上 =a c -g×sinθ;

[0040] In downhill conditions, the maximum deceleration a provided by the coasting energy recovery strategy is 下 :a 下 =a c+g×sinθ;

[0041] Where θ is the slope and g is the acceleration due to gravity.

[0042] The present invention also provides a vehicle coasting energy recovery system, comprising:

[0043] Factory settings unit for setting the car's coasting energy recovery strategy;

[0044] A user collection unit, used to collect the user's driving behavior data after a first preset time has passed or after the car has traveled a preset distance;

[0045] A data analysis unit, used to obtain a user's driving habits based on the driving behavior data;

[0046] A dynamic adjustment unit is used to dynamically adjust the coasting energy recovery strategy according to the user's driving habits.

[0047] The present invention also provides a computer program product, comprising a computer program, wherein when the computer program is executed by a processor, the steps of the above-mentioned vehicle coasting energy recovery method are implemented.

[0048] The embodiment of the present invention provides a method, system and computer program product for car coasting energy recovery, wherein the method includes: setting a car coasting energy recovery strategy; collecting driving behavior data of a user after a first preset time or after the car has traveled a preset distance; obtaining the user's driving habits based on the driving behavior data; and dynamically adjusting the coasting energy recovery strategy based on the user's driving habits. The present invention improves the user's initial experience of the car by formulating a default coasting energy recovery strategy for the car as a basic recovery strategy, obtains the user's driving habits by collecting the user's driving behavior data, and dynamically adjusts the coasting energy recovery strategy based on the user's driving habits, which not only ensures that the car has a higher energy recovery efficiency in the coasting energy recovery state, but also improves the user's driving experience in this state. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying any creative work.

[0050] Figure 1 A schematic flow chart of a vehicle coasting energy recovery method provided by an embodiment of the present invention;

[0051] Figure 2 A schematic diagram of a sub-process of a vehicle coasting energy recovery method provided by an embodiment of the present invention;

[0052] Figure 3 A schematic diagram of a sub-process of a vehicle coasting energy recovery method provided by an embodiment of the present invention;

[0053] Figure 4 A schematic diagram of a sub-process of a vehicle coasting energy recovery method provided by an embodiment of the present invention;

[0054] Figure 5 A schematic block diagram of an automobile coasting energy recovery system provided by an embodiment of the present invention;

[0055] Figure 6 A schematic block diagram of a factory setting unit provided in an embodiment of the present invention;

[0056] Figure 7 A schematic block diagram of a data analysis unit provided in an embodiment of the present invention;

[0057] Figure 8 A schematic block diagram of a dynamic adjustment unit provided in an embodiment of the present invention;

[0058] Fig. 9 A glide energy recovery strategy setting diagram provided by an embodiment of the present invention;

[0059] Fig.10 The accelerator pedal opening-vehicle acceleration coordinate system provided by the embodiment of the present invention. DETAILED DESCRIPTION

[0060] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0061] It should be understood that when used in this specification and the appended claims, the terms "include" and "comprises" indicate the presence of described features, integers, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or combinations thereof.

[0062] It should also be understood that the terms used in this specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. As used in the specification of the present invention and the appended claims, unless the context clearly indicates otherwise, the singular forms "a", "an" and "the" are intended to include plural forms.

[0063] It should be further understood that the term "and / or" used in the present description and the appended claims refers to any and all possible combinations of one or more of the associated listed items, and includes these combinations.

[0064] The coasting of the car in the present invention does not include coasting under braking, because braking triggers brake energy recovery. At this time, safety should be considered first. Energy recovery is carried out under the premise of safety. The size of energy recovery depends on many aspects, such as the structure of the braking system, the torque distribution relationship between mechanical braking and electric braking, and the user's braking torque demand corresponding to the corresponding brake pedal opening, etc. These are not within the setting range of the present invention. The present invention only considers the energy recovery intensity setting during the coasting process, that is, when the brake pedal is not pressed.

[0065] Combination Figure 1 As shown, the present invention provides a method for recovering vehicle coasting energy, comprising steps S10 to S40:

[0066] S10, setting a coasting energy recovery strategy for the vehicle;

[0067] In this step, before the car leaves the factory, the car manufacturer needs to provide the car's default coasting energy recovery strategy as the basic recovery strategy. The strategy provides the corresponding car coasting energy recovery deceleration values ​​at different vehicle speeds. Before obtaining a coasting energy recovery strategy suitable for the user, the car uses the default coasting energy recovery strategy.

[0068] Combination Figure 2 As shown, in some embodiments, setting a coasting energy recovery strategy for a vehicle includes steps S101 to S105:

[0069] S101, within a preset time period, obtaining speed information and deceleration information recorded every second preset time when the vehicle is in a coasting energy recovery state;

[0070] In this step, the preset time period is customized by the automobile manufacturer, such as 5 days, 10 days or one month, etc. The second preset time is customized by the automobile manufacturer, and the preferred time is 1 second.

[0071] S102, establishing a speed and deceleration coordinate system according to the speed information and the deceleration information;

[0072] In this step, combine Fig. 9 As shown, the horizontal axis is the vehicle speed and the vertical axis is the vehicle acceleration. Since the acceleration of the vehicle during gliding is mainly considered, that is, the acceleration is less than zero, the vehicle acceleration is called deceleration here. The speed and deceleration coordinate system is drawn according to the speed information and deceleration information obtained in step S101, and the deceleration corresponding to the speed when the vehicle is in the gliding energy recovery state can be intuitively viewed.

[0073] S103, setting a deceleration interval according to the deceleration information;

[0074] In this step, the purpose of setting the deceleration interval is to eliminate special working points. In actual application scenarios, the working points covered between the energy recovery curve S and the X-axis account for t% of the probability of all gliding energy recovery working points. The specific value of t is set by the manufacturer, usually 97-98, that is, 2%-3% of special working points outside the S line are eliminated. The deceleration interval is set according to the deceleration information of the working points that are not eliminated. Setting the deceleration interval can prevent large decelerations from causing driving discomfort to users.

[0075] S104, obtaining an energy recovery boundary curve S according to the speed and deceleration coordinate system and the deceleration interval through continuous smoothing processing;

[0076] Specifically, in the speed and deceleration coordinate system, a deceleration section corresponding to a certain ΔV is randomly selected, and the deceleration increases from small to large to the t% quantile, where the t% quantile is the boundary value of the deceleration interval. The working points outside the boundary value are eliminated to obtain the sliding deceleration value a corresponding to the deceleration section. i ; Continuously take all the sliding deceleration values ​​a corresponding to the car speed reaching the maximum value from 0 i , such as a0, a1, ..., a n-1 、a n , according to a i The corresponding sliding deceleration value a is formed at different vehicle speeds i Discrete points; according to the sliding deceleration value a i The discrete points form a smooth curve S.

[0077] For example, a smooth curve S is formed by connecting through cubic spline interpolation, wherein the specific method of cubic spline interpolation is as follows:

[0078] For data points (V0, a0), (V1, a1), ..., (V n-1 , a n-1 ), (V n , a n ), the cubic spline interpolation function S(V) can be expressed as:

[0079] S(V)=b i +c i (VV i )+d i (VV i ) 2 +e i (VV i ) 3

[0080] For each subinterval [Vi ,V i+1 ], where i = 0, 1, ..., n, coefficient b i , c i , d i , e i The following conditions must be met:

[0081] S(V i )=a i ;

[0082] S″(V i )=S″(V i+1 );

[0083] S′(V0)=S′(V n )=0;

[0084] In addition, it should be noted that there are many mathematical methods for curve smoothing. The above only uses the cubic spline interpolation method as an example, but is not limited to this method.

[0085] S105. Setting a coasting energy recovery strategy for the vehicle according to the energy recovery boundary curve S.

[0086] In this embodiment, a speed and deceleration coordinate system is drawn using the speed information and deceleration information of the vehicle in a gliding energy recovery state, and an energy recovery boundary curve S is drawn using a continuous smooth curve to set the gliding energy recovery strategy of the vehicle. The default gliding energy recovery strategy obtained in this way can be suitable for the operating habits of more users, while ensuring that the vehicle has a higher energy recovery efficiency in a gliding energy recovery state, thereby improving the user's driving experience.

[0087] S20, collecting the user's driving behavior data after each first preset time or after the car has traveled a preset distance;

[0088] In this step, after the car leaves the factory, the driving behavior data of the car user is collected after each first preset time or after the car has traveled a preset distance, that is, the adjustment of the coasting energy recovery strategy for different users is started. In the actual application scenario, the car is provided with a switch for adjusting the coasting energy recovery strategy, so that the coasting energy recovery strategy of the car can be quickly adapted to different users.

[0089] S30, obtaining the user's driving habits according to the driving behavior data;

[0090] In this step, the user driving habits, that is, different user vehicle decelerations corresponding to different user vehicle speeds when the car is in a gliding energy recovery state, are recorded after confirming that the car is in a gliding energy recovery state, so as to adjust a gliding energy recovery strategy that is more suitable for different users.

[0091] In some embodiments, the user's driving behavior data includes: accelerator pedal opening, brake pedal opening, user's vehicle speed, and user's vehicle deceleration.

[0092] In this embodiment, the accelerator pedal opening and the brake pedal opening are used to determine whether the vehicle is in a gliding energy recovery state. According to the user vehicle speed and the user vehicle deceleration, the user vehicle speed information and the user vehicle deceleration information of the vehicle in the gliding energy recovery state can be obtained more quickly, thereby quickly obtaining a gliding energy recovery strategy suitable for the user.

[0093] Combination Figure 3 As shown, in some specific embodiments, obtaining the user's driving habits based on the driving behavior data includes steps S301 to S302:

[0094] S301, judging whether the vehicle is in a coasting energy recovery state according to the accelerator pedal opening and the brake pedal opening;

[0095] Combination Fig.10 As shown, in a specific embodiment, when the accelerator pedal opening is less than a preset opening and the brake pedal opening is zero, the vehicle is in a coasting energy recovery state.

[0096] In this step, the horizontal axis represents the accelerator pedal opening, the vertical axis represents the vehicle acceleration, the upper part of the X-axis represents the driving, and the lower part of the X-axis represents the coasting energy recovery. Since the present invention only considers the energy recovery intensity setting during the coasting process, that is, when the brake pedal is not pressed, therefore, when the brake pedal opening is zero, it can be judged whether the vehicle is in the coasting energy recovery state according to the accelerator pedal opening, wherein the preset opening is h%, which is set by the manufacturer according to the configuration of the vehicle. When the accelerator pedal opening is greater than h%, the vehicle is in the driving state, and when the accelerator pedal opening is less than h%, the vehicle is in the coasting energy recovery state. At the same time, as the accelerator pedal opening continues to decrease, the coasting energy recovery intensity continues to increase, and the deceleration generated continues to increase. When the accelerator pedal opening is 0, the coasting energy recovery deceleration at the corresponding vehicle speed reaches the maximum.

[0097] S302, obtaining the user vehicle speed information and the user vehicle deceleration information recorded every second preset time when the vehicle is in a coasting energy recovery state.

[0098] In this embodiment, by judging whether the vehicle is in a gliding energy recovery state through the accelerator pedal opening and the brake pedal opening, the state of the vehicle can be judged relatively simply, thereby more accurately obtaining the user's vehicle speed information and the user's vehicle deceleration information, and then more quickly obtaining a gliding energy recovery strategy suitable for the user.

[0099] S40. Dynamically adjust the coasting energy recovery strategy according to the user's driving habits.

[0100] In this step, the coasting energy recovery strategy is dynamically adjusted according to the user's driving habits, which not only ensures that the car has a higher energy recovery efficiency in the coasting energy recovery state, but also improves the user's driving experience in this state.

[0101] Combination Figure 4 As shown, in some embodiments, the coasting energy recovery strategy is dynamically adjusted according to the user's driving habits, including steps S401 to S404:

[0102] S401, establishing a user vehicle speed and user vehicle deceleration coordinate system according to the user vehicle speed information and the user vehicle deceleration information;

[0103] S402, setting a deceleration interval of the user's vehicle according to the deceleration information of the user's vehicle;

[0104] S403, obtaining a user energy recovery boundary curve S′ according to the user vehicle speed, the user vehicle deceleration coordinate system and the user vehicle deceleration interval through continuous smoothing processing;

[0105] S404: Setting a coasting energy recovery strategy for the car user according to the user energy recovery boundary curve S′.

[0106] In this embodiment, steps S401 to S404 are the same as steps S102 to S105, with the difference that steps S102 to S105 are recovery strategies based on a default coasting energy recovery strategy formulated for the vehicle before leaving the factory, while steps S401 to S404 are recovery strategies based on a coasting energy recovery strategy suitable for different users driving the vehicle after leaving the factory, which greatly improves the energy recovery efficiency of the vehicle in the coasting energy recovery state while improving user comfort.

[0107] In some embodiments, the coasting energy recovery strategy includes:

[0108] Under normal conditions, the maximum deceleration provided by the coasting energy recovery strategy is a c ;

[0109] When the car is going uphill or downhill, the maximum deceleration a provided by the car's sliding energy recovery strategy needs to be combined with the slope c Correction: In uphill conditions, the maximum deceleration provided by the coasting energy recovery strategy is a 上 :a 上 =a c -g×sinθ;

[0110] In downhill conditions, the maximum deceleration a provided by the coasting energy recovery strategy下 :a 下 =a c +g×sinθ;

[0111] Where θ is the slope in degrees, and g is the acceleration due to gravity in m / s 2 .

[0112] In this embodiment, the maximum deceleration a provided by the vehicle coasting energy recovery strategy is combined with the slope. c Making the correction helps maintain the car's high energy recovery efficiency when coasting on uphill and downhill slopes, preventing users from having a poor driving experience due to failure to adjust the coasting energy recovery strategy when driving uphill and downhill slopes.

[0113] Combination Figure 5 As shown, the present invention also provides a vehicle coasting energy recovery system, comprising:

[0114] The factory setting unit 100 is used to set the coasting energy recovery strategy of the vehicle;

[0115] The user collection unit 200 is used to collect the user's driving behavior data after a first preset time has passed or after the car has traveled a preset distance;

[0116] The data analysis unit 300 is used to obtain the user's driving habits according to the driving behavior data;

[0117] The dynamic adjustment unit 400 is used to dynamically adjust the coasting energy recovery strategy according to the user's driving habits.

[0118] In the embodiment of the present invention, a default gliding energy recovery strategy is formulated for the automobile by the factory setting unit 100 as a basic recovery strategy to improve the user's initial experience of the automobile, the user's driving behavior data is collected by the user collection unit 200, and the user's driving habits are obtained based on the user's driving behavior data by the data analysis unit 300, and the gliding energy recovery strategy is dynamically adjusted based on the user's driving habits by the dynamic adjustment unit 400, which not only ensures that the automobile has a higher energy recovery efficiency in the gliding energy recovery state, but also improves the user's driving experience in this state.

[0119] Combination Figure 6 As shown, in some embodiments, the factory setting unit 100 includes:

[0120] The first acquisition unit 101 is used to acquire speed information and deceleration information recorded every second preset time when the vehicle is in a coasting energy recovery state within a preset time period;

[0121] A first information statistics unit 102, used to establish a speed and deceleration coordinate system according to the speed information and the deceleration information;

[0122] A first interval setting unit 103, configured to set a deceleration interval according to the deceleration information;

[0123] A first smoothing processing unit 104, configured to obtain an energy recovery boundary curve S according to a speed and deceleration coordinate system and a deceleration interval through continuous smoothing processing;

[0124] The first strategy setting unit 105 is used to set the coasting energy recovery strategy of the vehicle according to the energy recovery boundary curve S.

[0125] In this embodiment, the factory setting unit 100 obtains the speed information and deceleration information of the vehicle through the first acquisition unit 101, establishes the speed and deceleration coordinate system of the vehicle in the gliding energy recovery state through the first information statistics unit 102, sets the deceleration interval through the first interval setting unit 103, and draws the energy recovery boundary curve S through the first smoothing processing unit 104 to set the gliding energy recovery strategy of the vehicle. The default gliding energy recovery strategy obtained in this way can be suitable for the operating habits of more users, and improves the user's driving experience while ensuring that the vehicle has a higher energy recovery efficiency in the gliding energy recovery state.

[0126] Combination Figure 7 As shown, the data analysis unit 300 includes:

[0127] A judging unit 301 is used to judge whether the vehicle is in a coasting energy recovery state according to an accelerator pedal opening and a brake pedal opening;

[0128] The second acquisition unit 302 is used to acquire the user vehicle speed information and the user vehicle deceleration information recorded every second preset time when the vehicle is in a coasting energy recovery state.

[0129] In this embodiment, the data analysis unit 300 determines whether the vehicle is in a gliding energy recovery state through the judgment unit 301, and can judge the state of the vehicle more simply, thereby more accurately obtaining the user's vehicle speed information and the user's vehicle deceleration information through the second acquisition unit 302, and then more quickly obtaining a gliding energy recovery strategy suitable for the user.

[0130] Combination Figure 8 As shown, the dynamic adjustment unit 400 includes:

[0131] The second information statistics unit 401 is used to establish a user vehicle speed and user vehicle deceleration coordinate system according to the user vehicle speed information and the user vehicle deceleration information;

[0132] The second interval setting unit 402 is used to set the user vehicle deceleration interval according to the user vehicle deceleration information;

[0133] The second smoothing processing unit 403 is used to obtain the user energy recovery boundary curve S′ according to the user vehicle speed, the user vehicle deceleration coordinate system and the user vehicle deceleration interval through continuous smoothing processing;

[0134] The second strategy setting unit 404 is used to set a coasting energy recovery strategy for the car user according to the user energy recovery boundary curve S′.

[0135] In this embodiment, the dynamic adjustment unit 400 establishes a coordinate system of the user vehicle speed and the user vehicle deceleration when the user is driving the car in the gliding energy recovery state through the second information statistics unit 401, sets the user vehicle deceleration interval through the second interval setting unit 402, and draws the user energy recovery boundary curve S′ through the second smoothing processing unit 403 to adjust the gliding energy recovery strategy suitable for different users, thereby greatly improving the energy recovery efficiency of the car in the gliding energy recovery state while improving the user comfort.

[0136] In some specific embodiments, the second acquisition unit 302 and the first acquisition unit 101 are the same acquisition unit, the second information statistics unit 401 and the first information statistics unit 102 are the same information statistics unit, the second interval setting unit 402 and the first interval setting unit 103 are the same interval setting unit, the second smoothing processing unit 403 and the first smoothing processing unit 104 are the same smoothing processing unit 403, and the second setting strategy unit 404 and the first setting strategy unit 105 are the same setting strategy unit.

[0137] In this embodiment, the gliding energy recovery strategies for the car when driven by different users before and after leaving the factory are formulated by the same unit, which can simplify the car's gliding energy recovery system and quickly obtain a gliding energy recovery strategy suitable for the user, while ensuring the energy recovery efficiency of the car in the gliding energy recovery state and the user's driving experience.

[0138] The present invention also provides a computer program product, including a computer program, which implements the steps of the above-mentioned vehicle coasting energy recovery method when executed by a processor.

[0139] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed by the present invention, and these modifications or replacements should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention shall be based on the protection scope of the claims.

Claims

1. A method for recovering vehicle coasting energy, characterized in that: include: Set the car's coasting energy recovery strategy; After each first preset time or each time the car travels a preset distance, the user's driving behavior data is collected; Acquiring a user's driving habits according to the driving behavior data; The coasting energy recovery strategy is dynamically adjusted according to the user's driving habits.

2. The vehicle coasting energy recovery method according to claim 1, characterized in that: The setting of the coasting energy recovery strategy of the vehicle includes: Within a preset time period, obtaining speed information and deceleration information recorded every second preset time when the vehicle is in a coasting energy recovery state; Establishing a speed and deceleration coordinate system according to the speed information and deceleration information; Setting a deceleration interval according to the deceleration information; According to the speed and deceleration coordinate system and the deceleration interval, an energy recovery boundary curve S is obtained through continuous smoothing; The coasting energy recovery strategy of the vehicle is set according to the energy recovery boundary curve S.

3. The vehicle coasting energy recovery method according to claim 1, characterized in that: The step of obtaining the energy recovery boundary curve S according to the speed and deceleration coordinate system and the deceleration interval through continuous smoothing includes: In the speed and deceleration coordinate system, take a deceleration section corresponding to a certain section ΔV, and the deceleration increases from small to large to the boundary of the deceleration interval to obtain the sliding deceleration value a corresponding to the deceleration section. i ; Continuously obtain all the sliding deceleration values ​​a corresponding to the vehicle speed reaching the maximum value from 0 i , such as a0, a1, ..., a n-1 、a n , according to the sliding deceleration value a i The corresponding sliding deceleration value a is formed at different vehicle speeds i Discrete points; According to the coasting deceleration value a i The discrete points form a smooth curve S.

4. The vehicle coasting energy recovery method according to claim 1, characterized in that: The user's driving behavior data includes: Accelerator pedal opening, brake pedal opening, user vehicle speed, user vehicle deceleration.

5. The vehicle coasting energy recovery method according to claim 4, characterized in that: The obtaining the user's driving habits according to the driving behavior data includes: determining whether the vehicle is in a coasting energy recovery state according to the accelerator pedal opening and the brake pedal opening; The user vehicle speed information and the user vehicle deceleration information recorded every second preset time when the vehicle is in a coasting energy recovery state are obtained.

6. The vehicle coasting energy recovery method according to claim 5, characterized in that: The determining whether the vehicle is in a coasting energy recovery state according to the accelerator pedal opening and the brake pedal opening includes: When the accelerator pedal opening is less than a preset opening and the brake pedal opening is zero, the vehicle is in a coasting energy recovery state.

7. The vehicle coasting energy recovery method according to claim 5, characterized in that: The dynamically adjusting the coasting energy recovery strategy according to the user's driving habits includes: Establishing a user vehicle speed and user vehicle deceleration coordinate system according to the user vehicle speed information and the user vehicle deceleration information; Setting a user vehicle deceleration interval according to the user vehicle deceleration information; According to the user vehicle speed and the user vehicle deceleration coordinate system and the user vehicle deceleration interval, a user energy recovery boundary curve S′ is obtained through continuous smoothing processing; The coasting energy recovery strategy of the automobile user is set according to the user energy recovery boundary curve S′.

8. The vehicle coasting energy recovery method according to claim 1, characterized in that: The coasting energy recovery strategy includes: Under normal conditions, the maximum deceleration provided by the coasting energy recovery strategy is a c ; In the case of an uphill slope, the maximum deceleration a provided by the coasting energy recovery strategy is 上 :a 上 =a c -g×sinθ; In downhill conditions, the maximum deceleration a provided by the coasting energy recovery strategy is 下 :a 下 =a c +g×sinθ; Where θ is the slope and g is the acceleration due to gravity.

9. An automobile coasting energy recovery system, characterized in that: include: Factory settings unit for setting the car's coasting energy recovery strategy; A user collection unit, used to collect the user's driving behavior data after a first preset time has passed or after the car has traveled a preset distance; A data analysis unit, used to obtain a user's driving habits based on the driving behavior data; A dynamic adjustment unit is used to dynamically adjust the coasting energy recovery strategy according to the user's driving habits.

10. A computer program product, comprising a computer program, characterized in that When the computer program is executed by a processor, the steps of the method described in claim 1 are implemented.

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