An automobile adaptive energy recovery method and device and an automobile

Abstract

The application discloses a kind of automobile adaptive energy recovery method, device and automobile, when it is detected that the vehicle will enter deceleration demand scene, the current vehicle speed of current vehicle and the first deceleration corresponding to current vehicle speed are obtained, current vehicle speed is decelerated according to the first deceleration, the predicted vehicle speed of current vehicle after a preset deceleration period in coasting state is obtained, and the predicted vehicle distance between current vehicle and front vehicle, if predicted vehicle speed is equal to the speed of front vehicle and predicted vehicle distance is equal to safe vehicle distance, then at this time, coasting prompt information is output to driver, so that the distance between current vehicle and front vehicle can be relatively stable after energy recovery and maintained at safe vehicle distance, effectively avoid energy conversion loss caused by too large distance, and mechanical friction loss caused by too small distance, realize maximum energy recovery and can guarantee the comfort of driving.

Description

Technical Field

[0001] The present invention relates to the field of automobile technology, and more particularly to an automobile adaptive energy recovery method, an automobile adaptive energy recovery device and an automobile. Background Art

[0002] In order to maximize energy conservation, some cars (mainly electric cars or hybrid cars) currently have energy recovery technology. Specifically, it makes full use of the car's coasting time to convert the vehicle from a natural coasting state to a braking coasting state, allowing the motor to run in a power generation state, thereby increasing the driving range.

[0003] Existing coasting energy recovery strategies generally allow the driver to determine the coasting timing based on their driving situation. However, depending on the timing of coasting during driving, some additional energy loss may occur during the recovery of available energy. For example, if coasting is initiated too early, the distance between the vehicle and the preceding vehicle is large, which can easily lead to energy conversion losses due to accelerator pedal acceleration. If coasting is initiated too late, the distance between the vehicle and the preceding vehicle is shortened, which can easily lead to mechanical friction losses due to active braking.

[0004] Therefore, how to maximize energy recovery during vehicle coasting has become a technical problem that needs to be urgently solved by those skilled in the art. Summary of the Invention

[0005] In view of this, the present invention discloses an automobile adaptive energy recovery method, device and automobile, so as to achieve maximum energy recovery and ensure driving comfort.

[0006] An adaptive energy recovery method for an automobile, comprising:

[0007] When it is detected that the vehicle is about to enter a deceleration requirement scenario, obtaining the current speed of the vehicle and the deceleration corresponding to the current speed, which are recorded as a first deceleration;

[0008] Using the current vehicle speed as the initial vehicle speed, decelerating the initial vehicle speed according to the first deceleration rate to obtain a predicted vehicle speed after a preset deceleration period in the coasting state;

[0009] determining whether the predicted vehicle speed is equal to the speed of the vehicle ahead of the host vehicle;

[0010] If yes, obtaining a predicted distance between the host vehicle and the preceding vehicle after the host vehicle has been in a coasting state for one of the preset deceleration periods, and determining whether the predicted distance is equal to a safe distance;

[0011] If yes, output the sliding prompt information.

[0012] Optionally, the vehicle is about to enter a deceleration requirement scenario where: there is a moving vehicle in front of the vehicle, the speed of the vehicle in front is lower than the speed of the vehicle, and the distance between the vehicle and the vehicle in front is greater than the safety distance.

[0013] Optionally, obtaining the current speed of the vehicle and a deceleration corresponding to the current speed, recorded as a first deceleration, includes:

[0014] Obtaining the current speed of the vehicle;

[0015] The first deceleration corresponding to the current vehicle speed is obtained from a pre-calibrated correspondence between vehicle speed and deceleration.

[0016] Optionally, also include:

[0017] When the predicted vehicle speed is not equal to the speed of the vehicle ahead, obtaining a deceleration corresponding to the predicted vehicle speed, which is recorded as a second deceleration;

[0018] Using the predicted vehicle speed as the latest initial vehicle speed, decelerating the latest initial vehicle speed according to the second deceleration rate, to obtain the latest predicted vehicle speed after the vehicle has passed through the preset deceleration period in the coasting state;

[0019] Determining whether the latest predicted vehicle speed is equal to the speed of the vehicle ahead;

[0020] If yes, the predicted vehicle distance between the host vehicle and the vehicle ahead after the host vehicle has been in the coasting state for one of the preset deceleration cycles is obtained again.

[0021] Optionally, also include:

[0022] When the predicted vehicle distance is not equal to the safety distance, obtaining a deceleration corresponding to the predicted vehicle speed, which is recorded as a second deceleration;

[0023] Using the predicted vehicle speed as the latest initial vehicle speed, decelerating the latest initial vehicle speed according to the second deceleration rate, to obtain the latest predicted vehicle speed after the vehicle has passed through the preset deceleration period in the coasting state;

[0024] Determining whether the latest predicted vehicle speed is equal to the speed of the vehicle ahead;

[0025] If yes, the predicted vehicle distance between the host vehicle and the vehicle ahead after the host vehicle has been in the coasting state for one of the preset deceleration cycles is obtained again.

[0026] Optionally, determining whether the predicted vehicle distance is equal to the safety distance includes:

[0027] predict a distance traveled by the host vehicle in the preset deceleration period, denoted as a first distance, and predict a distance traveled by the front vehicle in the preset deceleration period, denoted as a second distance;

[0028] calculate a distance difference between the first distance and the second distance;

[0029] determine whether the distance difference is equal to an actual distance difference to determine whether a predicted distance between the host vehicle and the front vehicle is equal to the safety distance, wherein the actual distance difference is a difference between an actual distance between the host vehicle and the front vehicle and the safety distance when it is detected that the host vehicle is about to enter a deceleration demand scenario.

[0030] An automobile adaptive energy recovery device, comprising:

[0031] a first obtaining unit configured to obtain a current vehicle speed of a host vehicle and a deceleration corresponding to the current vehicle speed, denoted as a first deceleration, when it is detected that the host vehicle is about to enter a deceleration demand scenario;

[0032] a first deceleration unit configured to take the current vehicle speed as an initial vehicle speed, decelerate the initial vehicle speed according to the first deceleration, and obtain a predicted vehicle speed of the host vehicle after a preset deceleration period in a coasting state;

[0033] a first determining unit configured to determine whether the predicted vehicle speed is equal to a vehicle speed of a front vehicle of the host vehicle;

[0034] a second determining unit configured to, when the first determining unit determines that the predicted vehicle speed is equal to the vehicle speed of the front vehicle, obtain a predicted distance between the host vehicle and the front vehicle after the preset deceleration period in the coasting state, and determine whether the predicted distance is equal to a safety distance;

[0035] an information output unit configured to, when the second determining unit determines that the predicted distance is equal to the safety distance, output a coasting prompt information.

[0036] Optionally, the automobile adaptive energy recovery device further comprises:

[0037] a second obtaining unit configured to, when the first determining unit determines that the predicted vehicle speed is not equal to the vehicle speed of the front vehicle, obtain a deceleration corresponding to the predicted vehicle speed, denoted as a second deceleration;

[0038] a second deceleration unit configured to take the predicted vehicle speed as a latest initial vehicle speed, decelerate the latest initial vehicle speed according to the second deceleration, and obtain a latest predicted vehicle speed of the host vehicle after the preset deceleration period in the coasting state;

[0039] a third determining unit configured to determine whether the latest predicted vehicle speed is equal to the vehicle speed of the front vehicle.

[0040] The vehicle distance re-acquiring unit is configured to, when the third judging unit determines that the answer is yes, return to the second judging unit to re-acquire the predicted distance between the host vehicle and the front vehicle after the host vehicle travels in the coasting state for a preset deceleration period.

[0041] Optionally, the second judging unit is specifically configured to:

[0042] predict a distance traveled by the host vehicle in the preset deceleration period as a first distance, and predict a distance traveled by the front vehicle in the preset deceleration period as a second distance;

[0043] calculate a distance difference between the first distance and the second distance;

[0044] determine whether the distance difference is equal to an actual distance difference to determine whether the predicted distance between the host vehicle and the front vehicle is equal to the safety distance, wherein the actual distance difference is a difference between an actual distance between the host vehicle and the front vehicle and the safety distance when it is detected that the host vehicle is about to enter a deceleration demand scenario.

[0045] An automobile comprises a control device, the control device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, and the processor implements the steps of the method when executing the computer program.

[0046] According to the above technical solution, the present application discloses an automobile adaptive energy recovery method and device, and an automobile. When it is detected that the host vehicle is about to enter a deceleration demand scenario, the current speed of the host vehicle and a first deceleration corresponding to the current speed are acquired, the current speed is taken as an initial speed, the speed is decelerated according to the first deceleration, the predicted speed of the host vehicle after the host vehicle travels in the coasting state for a preset deceleration period is obtained, and the predicted distance between the host vehicle and the front vehicle is obtained. If the predicted speed is equal to the speed of the front vehicle, and the predicted distance between the host vehicle and the front vehicle is equal to the safety distance, a coasting prompt information is output to the driver at this time to remind the driver to release the accelerator pedal to perform adaptive energy recovery, so that the distance between the host vehicle and the front vehicle is relatively stable and maintained at the safety distance after the energy recovery, the energy conversion loss caused by the excessive distance between the host vehicle and the front vehicle when the accelerator is stepped on to accelerate is effectively avoided, and the mechanical friction loss caused by the small distance between the host vehicle and the front vehicle when the active brake is performed is effectively avoided, so that the maximum energy recovery is realized, and the driving comfort is ensured. BRIEF DESCRIPTION OF DRAWINGS

[0047] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description only represent some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained from the disclosed drawings without creative labor.

[0048] Figure 1 A flow chart of a vehicle adaptive energy recovery method disclosed by the embodiments of the present application;

[0049] Figure 2 A flow chart of another vehicle adaptive energy recovery method disclosed by the embodiments of the present application;

[0050] Figure 3 A schematic diagram of a vehicle entering a deceleration demand scenario disclosed by the embodiments of the present application;

[0051] Figure 4 A structural schematic diagram of a vehicle adaptive energy recovery device disclosed by the embodiments of the present application;

[0052] Figure 5 A structural schematic diagram of another vehicle adaptive energy recovery device disclosed by the embodiments of the present application. DETAILED DESCRIPTION

[0053] The technical solutions in the embodiments of the present application will be described clearly and completely below with the drawings in the embodiments of the present application. Obviously, the described embodiments only represent some of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application.

[0054] The embodiments of the present application disclose a vehicle adaptive energy recovery method, device and vehicle. When it is detected that the vehicle is about to enter a deceleration demand scenario, the current vehicle speed and the first deceleration corresponding to the current vehicle speed are obtained, the current vehicle speed is taken as an initial vehicle speed, the current vehicle speed is decelerated according to the first deceleration, the predicted vehicle speed of the vehicle after a preset deceleration period in a sliding state is obtained, and the predicted vehicle distance between the vehicle and the front vehicle is obtained. If the predicted vehicle speed is equal to the speed of the front vehicle, and the predicted vehicle distance between the vehicle and the front vehicle is equal to a safe vehicle distance, a sliding prompt information is output to the driver at this time to remind the driver to release the accelerator pedal for adaptive energy recovery, so that the vehicle distance between the vehicle and the front vehicle is relatively stable and maintained at a safe vehicle distance after energy recovery, energy conversion loss caused by too large vehicle distance when accelerating is effectively avoided, and mechanical friction loss caused by too small vehicle distance when actively braking is effectively avoided, so that maximum energy recovery is realized, and driving comfort is ensured.

[0055] See also Figure 1 , a flow chart of a method for adaptive energy recovery of an automobile disclosed in an embodiment of the present invention, the method comprising:

[0056] Step S101: When it is detected that the vehicle is about to enter a deceleration requirement scenario, the current speed of the vehicle and the deceleration corresponding to the current speed are obtained and recorded as a first deceleration;

[0057] In actual applications, the vehicle's driving-related information can be obtained through tools such as radar, cameras and maps installed in the vehicle, so as to obtain the upcoming deceleration demand scenario in advance, calculate the coasting time in advance based on the vehicle's driving-related information, and maximize the coasting energy recovery.

[0058] In this embodiment, the vehicle is about to enter a deceleration requirement scenario when there is a moving vehicle in front of the vehicle, the speed of the vehicle in front is lower than the speed of the vehicle in front, and the distance between the vehicle in front is greater than the safety distance.

[0059] Generally, the higher the vehicle speed, the greater the deceleration, and different driving modes correspond to different decelerations.

[0060] Step S102: using the current vehicle speed as the initial vehicle speed, decelerating the initial vehicle speed according to the first deceleration rate to obtain a predicted vehicle speed after a preset deceleration period in the coasting state;

[0061] This embodiment predicts the vehicle's driving trajectory based on a predetermined deceleration, i.e., the first deceleration. The driving trajectory is the speed path of the vehicle within a preset deceleration period after the accelerator pedal is released. The calculation formula for the predicted vehicle speed is as follows:

[0062] Vsim=V0+at (1);

[0063] Where Vsim is the predicted speed of the vehicle, V0 is the initial speed of the vehicle, a is the first deceleration, and t is the preset deceleration period.

[0064] It should be noted that, considering the driver's reaction time, the preset deceleration period t needs to take into account the driver's reaction time when releasing the pedal. In this embodiment, the preset deceleration period t is a fixed value, and the specific value is determined according to actual needs, and the present invention does not limit it here.

[0065] Step S103: determining whether the predicted vehicle speed is equal to the speed of the vehicle ahead of the host vehicle; if so, executing step S104;

[0066] It can be understood that if the speed of the vehicle in front is greater than that of this vehicle, the distance between the two vehicles will continue to increase; if the speed of the vehicle in front is less than that of this vehicle, the distance between the two vehicles will continue to decrease, and there is a risk of collision; when the speed of the vehicle in front is equal to that of this vehicle, the distance between the two vehicles remains unchanged, and the distance is equal to the safe distance, which is the most ideal state.

[0067] Therefore, if the predicted speed of the host vehicle is equal to the speed of the vehicle in front, the host vehicle will continue to determine whether the predicted distance between the host vehicle and the vehicle in front is equal to the safe distance.

[0068] Step S104: Obtaining a predicted distance between the host vehicle and the preceding vehicle after a predetermined deceleration period in the coasting state, and determining whether the predicted distance is equal to a safe distance. If so, executing step S105;

[0069] Step S105: outputting the sliding prompt information.

[0070] It should be noted that the present invention predicts whether there will be a moment in the future when the speed of the vehicle (i.e., the predicted speed) is equal to the speed of the vehicle in front, and the distance between the vehicle in front (i.e., the predicted distance) is equal to the safe distance based on the current speed of the vehicle and the corresponding first deceleration. When this happens, the driver is prompted to release the accelerator pedal, and after detecting that the driver has released the accelerator pedal, energy recovery is performed to decelerate the vehicle according to the first deceleration, thereby achieving maximum energy recovery and ensuring driving comfort.

[0071] In summary, the present invention discloses an adaptive energy recovery method for an automobile. When it is detected that the vehicle is about to enter a deceleration requirement scenario, the current speed of the vehicle and a first deceleration corresponding to the current speed are obtained. The current speed is used as the initial speed and the vehicle is decelerated according to the first deceleration to obtain the predicted speed of the vehicle after a preset deceleration period in the gliding state, as well as the predicted distance between the vehicle and the vehicle in front. When the predicted speed is equal to the speed of the vehicle in front and the predicted distance between the vehicle in front is equal to the safe distance, the distance between the vehicle and the vehicle in front is relatively stable and maintained at the safe distance. At this time, a gliding prompt message is output to the driver to remind the driver to release the accelerator pedal for adaptive energy recovery. This can effectively avoid energy conversion loss caused by accelerating due to excessive throttle distance and mechanical friction loss caused by active braking due to insufficient throttle distance, thereby achieving maximum energy recovery and ensuring driving comfort.

[0072] In addition, the present application can also obtain the maximum energy recovery torque, reduce the frequency of stepping on the brake, and ensure driving comfort when the predicted speed of the host vehicle is equal to the speed of the front vehicle and the predicted distance between the host vehicle and the front vehicle is equal to the safe distance.

[0073] To further optimize the above embodiment, step S101 can specifically include:

[0074] obtaining the current speed of the host vehicle;

[0075] obtaining the first deceleration corresponding to the current speed from the pre-labeled corresponding relationship between the speed and the deceleration.

[0076] In actual application, the corresponding relationship between the speed and the deceleration can be obtained through test labeling. In the labeling process, the driving state of the host vehicle, the driving state of the front vehicle, and the safe distance can be used as the basis, and the driving state can include speed, acceleration, and position information.

[0077] Generally, the higher the speed, the greater the deceleration, and different driving modes correspond to different decelerations. When labeling the deceleration, the smoothness and comfort of driving need to be considered.

[0078] In order to prevent the initial labeled deceleration from causing the speed of the host vehicle to jump, the present application also filters the deceleration when determining the corresponding relationship between the speed and the deceleration.

[0079] It should be particularly noted that the present application predicts the predicted speed after a preset deceleration period according to the current speed of the host vehicle and the corresponding deceleration. When the predicted speed is not equal to the speed of the front vehicle, it indicates that the current speed of the host vehicle has not been decelerated to the speed equal to that of the front vehicle after a preset deceleration period, and in this case, the obtained predicted speed needs to be decelerated again.

[0080] Therefore, to further optimize the above embodiment, referring to Figure 2 , another embodiment of the present application discloses a flow chart of an adaptive energy recovery method for a vehicle, which is based on Figure 1 When the step S103 is determined to be no, the embodiment shown in the figure can also include:

[0081] Step S106, obtaining the deceleration corresponding to the predicted speed, denoted as the second deceleration;

[0082] It should be particularly noted that the present application considers the distance between the two vehicles, the relative speed, and other factors when labeling the deceleration, so that the current speed of the host vehicle will not be decelerated to be lower than the speed of the front vehicle after a preset deceleration period.

[0083] The second deceleration corresponding to the predicted vehicle speed is also obtained from the pre-calibrated correspondence between the vehicle speed and the deceleration.

[0084] Step S107: using the predicted vehicle speed as the latest initial vehicle speed, decelerating the latest initial vehicle speed according to the second deceleration rate to obtain the latest predicted vehicle speed after the vehicle has been in a coasting state for a preset deceleration period;

[0085] In this embodiment, the expression of the latest predicted vehicle speed can be referred to formula (1), where Vsim is the latest predicted vehicle speed of the vehicle, V0 is the predicted vehicle speed of the vehicle, a is the second deceleration, and t is the preset deceleration period.

[0086] Step S108: Determine whether the latest predicted vehicle speed is equal to the speed of the vehicle ahead. If so, return to step S104 to again obtain the predicted distance between the vehicle ahead and the vehicle ahead after the vehicle has been in the coasting state for one of the preset deceleration cycles.

[0087] It should be noted that, when the latest predicted vehicle speed is not equal to the speed of the vehicle ahead, the process returns to step S106 , where the latest predicted vehicle speed is again used as the latest initial vehicle speed and a deceleration operation is performed.

[0088] It should be noted that when the judgment in step S104 is no, step S106 is continued to be executed.

[0089] To further optimize the above embodiment, the process of determining whether the distance between the vehicle and the vehicle ahead is equal to the safe distance in step S104 specifically includes:

[0090] (1) predicting the distance traveled by the host vehicle within a preset deceleration period, which is recorded as a first distance, and predicting the distance traveled by the preceding vehicle within the preset deceleration period, which is recorded as a second distance;

[0091] (2) calculating the distance difference between the first distance and the second distance;

[0092] (3) Determine whether the predicted distance difference is equal to the actual distance difference to determine whether the distance between the host vehicle and the vehicle ahead is equal to the safety distance.

[0093] The actual distance difference is the difference between the actual distance between the host vehicle and the vehicle ahead and the safety distance when it is detected that the host vehicle is about to enter a deceleration requirement scenario.

[0094] For details, see Figure 3The schematic diagram shows that the vehicle is about to enter a deceleration requirement scenario, the current speed of the vehicle is represented by V1, and the speed of the vehicle in front is represented by V2. When the vehicle is about to enter the deceleration requirement scenario, the actual distance between the vehicle and the vehicle in front is L1, and the safety distance between the vehicle and the vehicle in front is L2. Therefore, the actual distance difference between the vehicle and the vehicle in front at the initial time is L3=L1-L2.

[0095] This embodiment outputs a coasting prompt message when it is predicted that the speed of the vehicle is equal to that of the vehicle in front, and the predicted distance between the vehicle in front is equal to the safe distance. Since the predicted distance between the vehicle in front is obtained by prediction, the vehicle in front cannot directly detect this parameter in real time using radar or other equipment. Based on this, the present invention calculates the distance difference between the vehicle in front and the vehicle in front when their speeds are equal, that is, the difference between the first distance and the second distance in this embodiment. When this distance difference is equal to L3, it indicates that in the process of decelerating to the speed of the vehicle in front, the total distance traveled is L3 more than that of the vehicle in front, thereby achieving the speed of the vehicle in front being equal to that of the vehicle in front, and the distance between the vehicle in front being equal to the safe distance.

[0096] Corresponding to the above method embodiment, the present invention also discloses an automobile adaptive energy recovery device.

[0097] See also Figure 4 , a schematic structural diagram of an automobile adaptive energy recovery device disclosed in an embodiment of the present invention, the device includes:

[0098] The first acquisition unit 201 is configured to acquire the current speed of the vehicle and the deceleration corresponding to the current speed as a first deceleration when detecting that the vehicle is about to enter a deceleration requirement scenario;

[0099] In actual applications, vehicle driving-related information can be obtained through tools such as radar, cameras and maps installed in the vehicle, so as to obtain upcoming deceleration demand scenarios in advance and maximize gliding energy recovery.

[0100] In this embodiment, the vehicle is about to enter a deceleration requirement scenario when there is a moving vehicle in front of the vehicle, the speed of the vehicle in front is lower than the speed of the vehicle in front, and the distance between the vehicle in front is greater than the safety distance.

[0101] Generally, the higher the vehicle speed, the greater the deceleration, and different driving modes correspond to different decelerations.

[0102] a first deceleration unit 202 configured to use the current vehicle speed as an initial vehicle speed and decelerate the initial vehicle speed according to the first deceleration rate to obtain a predicted vehicle speed after a preset deceleration period in a coasting state;

[0103] In this embodiment, the vehicle's driving trajectory is determined based on a predetermined deceleration, i.e., the first deceleration. The driving trajectory is the speed path of the vehicle during a predetermined deceleration period after the accelerator pedal is released. The calculation formula for the predicted vehicle speed is as follows:

[0104] Vsim=V0+at (1);

[0105] Where Vsim is the predicted speed of the vehicle, V0 is the initial speed of the vehicle, a is the first deceleration, and t is the preset deceleration period.

[0106] It should be noted that, considering the driver's reaction time, the preset deceleration period t needs to take into account the driver's reaction time when releasing the pedal. In this embodiment, the preset deceleration period t is a fixed value, and the specific value is determined according to actual needs, and the present invention does not limit it here.

[0107] A first judgment unit 203 is used to judge whether the predicted vehicle speed is equal to the speed of the vehicle ahead of the vehicle;

[0108] It can be understood that if the speed of the vehicle in front is greater than that of this vehicle, the distance between the two vehicles will continue to increase; if the speed of the vehicle in front is less than that of this vehicle, the distance between the two vehicles will continue to decrease, and there is a risk of collision; when the speed of the vehicle in front is equal to that of this vehicle, the distance between the two vehicles remains unchanged, and the distance is equal to the safe distance, which is the most ideal state.

[0109] Therefore, if the predicted speed of the host vehicle is equal to the speed of the vehicle in front, the host vehicle will continue to determine whether the predicted distance between the host vehicle and the vehicle in front is equal to the safe distance.

[0110] The second judgment unit 204 is configured to obtain a predicted distance between the host vehicle and the preceding vehicle after the host vehicle has been in a coasting state for one of the preset deceleration periods, and to determine whether the predicted distance is equal to a safe distance, if the first judgment unit 203 determines that the predetermined distance is yes;

[0111] The information output unit 205 is configured to output taxiing prompt information when the second determining unit 204 determines that the answer is yes.

[0112] It should be noted that the present invention predicts whether there will be a moment in the future when the speed of the vehicle (i.e., the predicted speed) is equal to the speed of the vehicle in front, and the distance between the vehicle in front (i.e., the predicted distance) is equal to the safe distance based on the current speed of the vehicle and the corresponding first deceleration. When this happens, the driver is prompted to release the accelerator pedal, and after detecting that the driver has released the accelerator pedal, energy recovery is performed to decelerate the vehicle according to the first deceleration, thereby achieving maximum energy recovery and ensuring driving comfort.

[0113] In summary, the application discloses a kind of automobile adaptive energy recovery device, when detecting that the vehicle will enter deceleration demand scene, the current speed of the vehicle is obtained and the first deceleration corresponding to the current speed, the current speed is used as initial speed, deceleration is carried out according to the first deceleration, the predicted speed of the vehicle after a preset deceleration period in coasting state is obtained, and the predicted distance between the vehicle and the front vehicle, if predicted speed is equal to the speed of the front vehicle, and the predicted distance between the vehicle and the front vehicle is equal to safe distance, the application outputs coasting prompt information to driver at this moment, to remind driver to release accelerator pedal and carry out adaptive energy recovery, can make the distance between the vehicle and the front vehicle relatively stable and maintain at safe distance after energy recovery, effectively avoid energy conversion loss caused by too large distance and mechanical friction loss caused by too small distance, to realize maximum energy recovery, and can guarantee the comfort of driving.

[0114] In addition, the application carries out coasting operation when the predicted speed of the vehicle is equal to the speed of the front vehicle, and the predicted distance between the vehicle and the front vehicle is equal to safe distance, and can also obtain maximum energy recovery torque, while ensuring driving comfort, reducing the frequency of stepping on brake.

[0115] To further optimize the above embodiment, the first acquisition unit 201 can be specifically used for:

[0116] acquire the current speed of the vehicle;

[0117] acquire the first deceleration corresponding to the current speed from the pre-calibrated corresponding relationship between speed and deceleration.

[0118] In actual application, the corresponding relationship between speed and deceleration can be obtained by test calibration. In the calibration process, the driving state of the vehicle, the driving state of the front vehicle and the safe distance can be based on, and the driving state can include speed, acceleration and position information, etc.

[0119] Generally, the higher the speed, the greater the deceleration, and different driving modes correspond to different decelerations. When deceleration is calibrated, the smoothness and comfort of driving need to be considered.

[0120] In order to prevent the deceleration obtained by initial calibration from causing the speed of the vehicle to jump, the application will also filter the deceleration when determining the corresponding relationship between speed and deceleration.

[0121] It should be noted that since the present invention predicts the predicted speed after a preset deceleration cycle based on the current speed of the vehicle and the corresponding deceleration, when the predicted speed is not equal to the speed of the vehicle in front, it indicates that the current speed of the vehicle has not been decelerated to a speed equal to the speed of the vehicle in front after deceleration for a preset deceleration cycle. In this case, the predicted speed needs to be decelerated again.

[0122] Therefore, to further optimize the above embodiment, see Figure 5 , a schematic diagram of the structure of another automobile adaptive energy recovery device disclosed in an embodiment of the present invention, Figure 4 Based on the embodiment shown, the device may further include:

[0123] A second acquiring unit 206 is configured to acquire a deceleration corresponding to the predicted vehicle speed, if the first determining unit 203 determines that the vehicle speed is negative, and record the deceleration as a second deceleration;

[0124] It should be noted that the present invention takes into account factors such as the distance between the two vehicles and the relative speed when performing deceleration calibration. Therefore, after the current speed of the vehicle is decelerated through a preset deceleration cycle, it will not decelerate to a speed lower than that of the vehicle in front.

[0125] The second deceleration corresponding to the predicted vehicle speed is also obtained from the pre-calibrated correspondence between the vehicle speed and the deceleration.

[0126] a second deceleration unit 207 configured to use the predicted vehicle speed as the latest initial vehicle speed, decelerate the latest initial vehicle speed according to the second deceleration rate, and obtain the latest predicted vehicle speed after the vehicle has passed the preset deceleration period in the coasting state;

[0127] The third judgment unit 208 is used to judge whether the latest predicted vehicle speed is equal to the speed of the vehicle ahead;

[0128] In this embodiment, the expression of the latest predicted vehicle speed can be referred to formula (1), where Vsim is the latest predicted vehicle speed of the vehicle, V0 is the predicted vehicle speed of the vehicle, a is the second deceleration, and t is the preset deceleration period.

[0129] The vehicle distance re-acquisition unit 209 is used to return to the second judgment unit 204 when the third judgment unit 208 determines that it is yes, and re-acquire the predicted vehicle distance between the vehicle and the vehicle in front after the vehicle has been in the coasting state for one preset deceleration period.

[0130] To further optimize the above embodiment, the second determination unit 204 may be specifically configured to:

[0131] Predicting a distance traveled by the host vehicle within the preset deceleration period, recorded as a first distance, and predicting a distance traveled by the preceding vehicle within the preset deceleration period, recorded as a second distance;

[0132] calculating a distance difference between the first distance and the second distance;

[0133] Determine whether the distance difference is equal to the actual distance difference to determine whether the predicted vehicle distance between the host vehicle and the vehicle in front is equal to the safety distance, wherein the actual distance difference is the difference between the actual distance between the host vehicle and the vehicle in front and the safety distance when it is detected that the host vehicle is about to enter a deceleration requirement scenario.

[0134] It should be noted that, in the device embodiment, the specific working principles of each component can be found in the corresponding part of the method embodiment, which will not be repeated here.

[0135] The present invention also discloses a car, which includes a control device, the control device including a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, adaptive energy recovery of the car is achieved. The process of adaptive energy recovery achieved by the car is specifically described in the corresponding part of the above embodiment and will not be repeated here.

[0136] Finally, it should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of additional identical elements in the process, method, article, or device comprising the element.

[0137] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0138] The foregoing description of the disclosed embodiments enables a person skilled in the art to make or use the application. Modifications of these embodiments will occur to persons of skill in the art, and, while certain modifications are discussed, it is desired to be protected in accordance with the spirit and scope of the application. Therefore, the application is not limited to the specific embodiments shown and described, but only by the scope of the appended claims, unless otherwise specified.

Claims

1. A method for adaptive energy recovery of an automobile, characterized in that: include: When it is detected that the vehicle is about to enter a deceleration requirement scenario, obtaining the current speed of the vehicle and the deceleration corresponding to the current speed, which are recorded as a first deceleration; Using the current vehicle speed as the initial vehicle speed, decelerating the initial vehicle speed according to the first deceleration rate to obtain a predicted vehicle speed after a preset deceleration period in the coasting state; determining whether the predicted vehicle speed is equal to the speed of the vehicle ahead of the host vehicle; If yes, obtaining a predicted distance between the host vehicle and the preceding vehicle after the host vehicle has been in a coasting state for one of the preset deceleration periods, and determining whether the predicted distance is equal to a safe distance; If yes, output the sliding prompt information; When the predicted vehicle speed is not equal to the speed of the vehicle ahead, or the predicted vehicle distance is not equal to the safety distance, obtaining a deceleration corresponding to the predicted vehicle speed, which is recorded as a second deceleration; Using the predicted vehicle speed as the latest initial vehicle speed, decelerating the latest initial vehicle speed according to the second deceleration rate, to obtain the latest predicted vehicle speed after the vehicle has passed through the preset deceleration period in the coasting state; Determining whether the latest predicted vehicle speed is equal to the speed of the vehicle ahead; If yes, the predicted vehicle distance between the host vehicle and the vehicle ahead after the host vehicle has been in the coasting state for one of the preset deceleration cycles is obtained again.

2. The automobile adaptive energy recovery method according to claim 1, characterized in that: The scenario in which the vehicle is about to enter a deceleration requirement is that: there is a moving vehicle in front of the vehicle, the speed of the vehicle in front is lower than the speed of the vehicle, and the distance between the vehicle and the vehicle in front is greater than the safety distance.

3. The automobile adaptive energy recovery method according to claim 1, characterized in that: The obtaining of the current vehicle speed and the deceleration corresponding to the current vehicle speed, recorded as a first deceleration, includes: Obtaining the current speed of the vehicle; The first deceleration corresponding to the current vehicle speed is obtained from a pre-calibrated correspondence between vehicle speed and deceleration.

4. The automobile adaptive energy recovery method according to any one of claims 1 to 3, characterized in that: The determining whether the predicted vehicle distance is equal to the safe distance includes: Predicting a distance traveled by the host vehicle within the preset deceleration period, recorded as a first distance, and predicting a distance traveled by the preceding vehicle within the preset deceleration period, recorded as a second distance; calculating a distance difference between the first distance and the second distance; Determine whether the distance difference is equal to the actual distance difference to determine whether the predicted vehicle distance between the host vehicle and the vehicle in front is equal to the safety distance, wherein the actual distance difference is the difference between the actual distance between the host vehicle and the vehicle in front and the safety distance when it is detected that the host vehicle is about to enter a deceleration requirement scenario.

5. An adaptive energy recovery device for an automobile, characterized in that: include: a first acquiring unit, configured to acquire, when detecting that the vehicle is about to enter a deceleration requirement scenario, a current vehicle speed of the vehicle and a deceleration corresponding to the current vehicle speed, and record the deceleration as a first deceleration; a first deceleration unit, configured to use the current vehicle speed as an initial vehicle speed, decelerate the initial vehicle speed according to the first deceleration rate, and obtain a predicted vehicle speed after a preset deceleration period in a coasting state; a first determining unit, configured to determine whether the predicted vehicle speed is equal to the speed of the vehicle ahead of the host vehicle; a second determination unit configured to, if the first determination unit determines that the predetermined deceleration period has elapsed, obtain a predicted distance between the host vehicle and the preceding vehicle in a coasting state and determine whether the predicted distance is equal to a safe distance; an information output unit, configured to output taxiing prompt information if the second judgment unit determines that the taxiing prompt information is yes; a second acquiring unit, configured to acquire a deceleration corresponding to the predicted vehicle speed as a second deceleration when the predicted vehicle speed is not equal to the speed of the vehicle ahead, or when the predicted vehicle distance is not equal to the safety distance; a second deceleration unit, configured to use the predicted vehicle speed as a latest initial vehicle speed, decelerate the latest initial vehicle speed according to the second deceleration rate, and obtain a latest predicted vehicle speed after the vehicle has passed through a preset deceleration period in a coasting state; a third judgment unit, configured to judge whether the latest predicted vehicle speed is equal to the speed of the vehicle ahead; The vehicle distance re-acquisition unit is used to return to the second judgment unit when the third judgment unit determines that it is yes, and re-acquire the predicted vehicle distance between the vehicle and the vehicle in front after the vehicle has been in the coasting state for one preset deceleration period.

6. The vehicle adaptive energy recovery device according to claim 5, characterized in that: The second judgment unit is specifically configured to: Predicting a distance traveled by the host vehicle within the preset deceleration period, recorded as a first distance, and predicting a distance traveled by the preceding vehicle within the preset deceleration period, recorded as a second distance; calculating a distance difference between the first distance and the second distance; Determine whether the distance difference is equal to the actual distance difference to determine whether the predicted vehicle distance between the host vehicle and the vehicle in front is equal to the safety distance, wherein the actual distance difference is the difference between the actual distance between the host vehicle and the vehicle in front and the safety distance when it is detected that the host vehicle is about to enter a deceleration requirement scenario.

7. An automobile, comprising a control device, the control device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein: When the processor executes the computer program, the steps of the method according to any one of claims 1 to 4 are implemented.

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