Vehicle wheel-side torque determination method, device and medium

Abstract

This application provides a method, device, and medium for determining vehicle wheel torque. The method obtains an initial calibration table corresponding to each vehicle driving mode. For each driving mode, based on the power performance adjustment information of the driving mode, it determines the target accelerator pedal opening corresponding to each initial accelerator pedal opening at each initial vehicle speed in the initial calibration table, generating a virtual pedal opening correction table. Then, using the initial calibration table and the virtual pedal opening correction table, it determines the target wheel torque corresponding to each initial accelerator pedal opening at each initial vehicle speed in the initial calibration table. This achieves adjustment of vehicle power performance without affecting the initial calibration table, eliminating the need for recalibration by engineers, resulting in high calibration efficiency. It also eliminates the need to recalibrate shift points and re-optimize NVH, and does not affect the original driving style.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of automobiles, in particular to a vehicle wheel edge torque determination method, device and medium. BACKGROUND

[0002] The size of the vehicle wheel edge torque can affect the power performance and economy of the vehicle. For example, the greater the wheel edge torque, the greater the power of the vehicle, the stronger the power performance, the higher the energy consumption, and the lower the economy. The wheel edge torque corresponding to different working conditions can be obtained by looking up a table according to an engineer's calibrated graph or table.

[0003] However, after the vehicle is mass-produced or before the vehicle is mass-produced, if the power performance needs to be adjusted, the engineer usually needs to recalibrate, which is a large amount of work, resulting in low calibration efficiency and high requirements for the engineer's ability. In addition, recalibration will change the calibration graph or table, thereby causing the original data of the vehicle to be lost, affecting the shift point and NVH (Noise, Vibration, Harshness, noise, vibration and harshness), and the shift point needs to be recalibrated and the NVH needs to be re-optimized. SUMMARY

[0004] In view of the above defects or deficiencies in the prior art, the present application aims to provide a vehicle wheel edge torque determination method, device and medium, so as to adjust the wheel edge torque corresponding to each accelerator pedal opening without affecting the initial calibration table, without the need for engineers to recalibrate, with high calibration efficiency, and without the need to modify the original data of the vehicle, without the need to recalibrate the shift point and re-optimize the NVH.

[0005] The present application provides a vehicle wheel edge torque determination method, comprising:

[0006] Obtaining an initial calibration table corresponding to each vehicle driving mode, wherein the initial calibration table is used to describe the initial wheel edge torque corresponding to each initial accelerator pedal opening at each initial vehicle speed;

[0007] For each vehicle driving mode, obtaining power performance demand adjustment information of the vehicle driving mode, and determining a target accelerator pedal opening corresponding to each initial accelerator pedal opening at each initial vehicle speed in the initial calibration table based on the power performance demand adjustment information;

[0008] Based on the target accelerator pedal opening corresponding to each initial accelerator pedal opening at each initial vehicle speed, generating a virtual pedal opening correction table corresponding to the vehicle driving mode;

[0009] Determining the target wheel edge torque corresponding to each initial accelerator pedal opening at each initial vehicle speed in the initial calibration table according to the initial calibration table and the virtual pedal opening correction table.

[0010] Optionally, the obtaining the power demand adjustment information of the vehicle driving mode, and determining the target accelerator pedal opening corresponding to each of the initial accelerator pedal openings at each of the initial vehicle speeds in the initial calibration table based on the power demand adjustment information, comprises:

[0011] If the power demand adjustment information of the vehicle driving mode is power demand enhancement information, for each of the initial accelerator pedal openings in the initial calibration table, a first preset opening adjustment value of the initial accelerator pedal opening at each of the initial vehicle speeds is determined;

[0012] The target accelerator pedal opening corresponding to the initial accelerator pedal opening at the initial vehicle speed is determined based on a sum of the initial accelerator pedal opening and the first preset opening adjustment value at the initial vehicle speed.

[0013] Optionally, the obtaining the power demand adjustment information of the vehicle driving mode, and determining the target accelerator pedal opening corresponding to each of the initial accelerator pedal openings at each of the initial vehicle speeds in the initial calibration table based on the power demand adjustment information, further comprises:

[0014] If the power demand adjustment information of the vehicle driving mode is power demand reduction information, for each of the initial accelerator pedal openings in the initial calibration table, a second preset opening adjustment value of the initial accelerator pedal opening at each of the initial vehicle speeds is determined;

[0015] The target accelerator pedal opening corresponding to the initial accelerator pedal opening at the initial vehicle speed is determined based on a difference between the initial accelerator pedal opening and the second preset opening adjustment value at the initial vehicle speed.

[0016] Optionally, the determining the first preset opening adjustment value of the initial accelerator pedal opening at each of the initial vehicle speeds comprises:

[0017] The first preset opening adjustment value of the initial accelerator pedal opening at each of the initial vehicle speeds is determined based on an enhancement level in the power demand enhancement information;

[0018] Correspondingly, the determining the second preset opening adjustment value of the initial accelerator pedal opening at each of the initial vehicle speeds comprises:

[0019] The second preset opening adjustment value of the initial accelerator pedal opening at each of the initial vehicle speeds is determined based on a reduction level in the power demand reduction information.

[0020] Optionally, the determining the target wheel edge torque corresponding to each initial accelerator pedal opening at each initial vehicle speed according to the initial calibration table and the virtual accelerator pedal opening correction table comprises:

[0021] For each initial accelerator pedal opening in the initial calibration table, the target accelerator pedal opening corresponding to each initial vehicle speed is determined according to the virtual accelerator pedal opening correction table.

[0022] For each target accelerator pedal opening corresponding to each initial vehicle speed, the initial wheel edge torque corresponding to the initial accelerator pedal opening equal to the target accelerator pedal opening at the initial vehicle speed is determined according to the initial calibration table, so as to obtain the target wheel edge torque corresponding to the initial accelerator pedal opening at the initial vehicle speed.

[0023] Optionally, the determining the initial wheel edge torque corresponding to the initial accelerator pedal opening equal to the target accelerator pedal opening at the initial vehicle speed according to the initial calibration table comprises:

[0024] For each target accelerator pedal opening corresponding to each initial vehicle speed, the initial accelerator pedal opening equal to the target accelerator pedal opening is queried in the initial calibration table.

[0025] If the initial accelerator pedal opening equal to the target accelerator pedal opening does not exist in the initial calibration table, two initial accelerator pedal openings adjacent to the target accelerator pedal opening are taken as each reference accelerator pedal opening, and the initial wheel edge torque corresponding to each reference accelerator pedal opening at the initial vehicle speed is taken as each reference wheel edge torque.

[0026] Based on the difference between each reference wheel edge torque and the difference between each reference accelerator pedal opening, the wheel edge torque change corresponding to a single accelerator pedal opening is determined.

[0027] Based on the difference between the target accelerator pedal opening and the reference accelerator pedal opening and the wheel edge torque change corresponding to the single accelerator pedal opening, the initial wheel edge torque corresponding to the initial accelerator pedal opening equal to the target accelerator pedal opening at the initial vehicle speed is determined.

[0028] Optionally, after the virtual accelerator pedal opening correction table corresponding to the vehicle driving mode is generated, the method further comprises:

[0029] The online upgrade file is generated by the virtual pedal opening correction table, and is sent to each vehicle, so that each vehicle determines the required wheel edge torque corresponding to the current accelerator pedal opening at the current vehicle speed according to the initial calibration table corresponding to the vehicle driving mode and the virtual pedal opening correction table.

[0030] Optionally, the initial calibration table corresponding to each vehicle driving mode is obtained by:

[0031] For each vehicle type, the initial calibration table corresponding to each vehicle driving mode of the vehicle type is obtained, so as to obtain the virtual pedal opening correction table corresponding to each vehicle driving mode of the vehicle type.

[0032] Correspondingly, the online upgrade file is generated by the virtual pedal opening correction table, and is sent to each vehicle, including:

[0033] For each vehicle type, the online upgrade file corresponding to the vehicle type is generated by the virtual pedal opening correction table corresponding to the vehicle type, and is sent to each vehicle corresponding to the vehicle type.

[0034] The embodiment of the present application further provides an electronic device, which comprises:

[0035] a processor and a memory;

[0036] The processor is configured to execute the steps of the vehicle wheel edge torque determination method provided in any one of the embodiments of the present application by calling the program or instruction stored in the memory.

[0037] The embodiment of the present application further provides a computer readable storage medium, which stores a program or instruction, and the program or instruction makes the computer execute the steps of the vehicle wheel edge torque determination method provided in any one of the embodiments of the present application.

[0038] In summary, the application provides a vehicle wheel edge torque determination method. The method obtains an initial calibration table corresponding to each vehicle driving mode. For each vehicle driving mode, the method determines a target accelerator pedal opening degree corresponding to each initial accelerator pedal opening degree at each initial vehicle speed according to power demand adjustment information of the vehicle driving mode, generates a virtual pedal opening degree correction table, and determines a target wheel edge torque corresponding to each initial accelerator pedal opening degree at each initial vehicle speed in the initial calibration table through the initial calibration table and the virtual pedal opening degree correction table. The method realizes correction of each initial wheel edge torque in the initial calibration table. The method determines each target wheel edge torque through the virtual pedal opening degree correction table and the initial calibration table without affecting the initial calibration table, without the need for engineers to re-calibrate, and has high calibration efficiency. Moreover, the method avoids modification of original data of the vehicle, without the need for recalibration of shift points and re-optimization of NVH. In addition, each initial accelerator pedal opening degree in the initial calibration table remains unchanged, without affecting the original driving style. BRIEF DESCRIPTION OF DRAWINGS

[0039] In order to more clearly illustrate the technical solutions in the specific embodiments or prior art of the present application, the drawings needed in the specific embodiments or prior art description will be briefly introduced. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0040] Figure 1 is a flowchart of a vehicle wheel edge torque determination method provided by an embodiment of the present application;

[0041] Figure 2 is a structural schematic diagram of an electronic device provided by an embodiment of the present application. DETAILED DESCRIPTION

[0042] The present application will be further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the related application, and not to limit the application. In addition, it should be noted that only parts related to the application are shown in the drawings for ease of description.

[0043] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict. The present application will be described in detail below with reference to the drawings and embodiments.

[0044] As mentioned in the background, in order to solve the problems in the prior art, the present application provides a vehicle wheel edge torque determination method, which can be executed by a vehicle wheel edge torque determination device that can be integrated in an electronic control unit (ECU), a vehicle control unit (VCU), a computer, a tablet computer, or other electronic equipment. Figure 1 is a flowchart of a vehicle wheel edge torque determination method provided by an embodiment of the present application. Referring to Figure 1 , the vehicle wheel edge torque determination method specifically includes:

[0045] S110, obtaining an initial calibration table corresponding to each vehicle driving mode, wherein the initial calibration table is used to describe the initial wheel edge torque corresponding to each initial accelerator pedal opening degree at each initial vehicle speed.

[0046] Each vehicle driving mode can be a driving mode with different power that is set in advance. For example, each vehicle driving mode can include an energy-saving mode, a comfortable mode, a sports mode, a catapult mode, a escape mode, and a snow mode; the power of each mode increases in turn, and the economy and drivability decrease in turn.

[0047] Specifically, for each vehicle driving mode, the corresponding initial calibration table calibrated in advance can be obtained. The initial calibration table can be calibrated by engineers in the test stage before the vehicle is mass-produced.

[0048] The initial calibration table can be used to determine the corresponding wheel edge torque according to the accelerator pedal opening degree and the vehicle speed to achieve the control of the wheel edge torque during the vehicle driving process. The initial calibration table can include the corresponding relationship between each initial accelerator pedal opening degree, each initial vehicle speed, and each initial wheel edge torque.

[0049] For example, the initial accelerator pedal opening degree and the initial vehicle speed can be used as variables to query the initial wheel edge torque corresponding to the initial accelerator pedal opening degree and the initial vehicle speed in the initial calibration table. It should be noted that the wheel edge torque refers to the torque of the tire edge of the vehicle; the power of the engine is transmitted to the transmission or the reducer through the crankshaft, then to the differential, then to the two half shafts, and then to the tire. The greater the wheel edge torque, the stronger the power of the vehicle, and the lower the economy and drivability.

[0050] As shown in Table 1, part of the information in an initial calibration table is shown, wherein the horizontal axis in the table represents the initial vehicle speed, which can be in km / h, the vertical axis in the table represents the initial accelerator pedal opening degree, which can be in the proportion of the accelerator pedal opening degree, and each value in the middle represents the initial wheel edge torque corresponding to each initial accelerator pedal opening degree at each initial vehicle speed, which can be in Nm.

[0051] Table 1 Part of information in an initial calibration table

[0052]

[0053]

[0054] It should be noted that Table 1 shows part of information in an initial calibration table as an example. With the increase of the initial pedal opening, the corresponding initial wheel edge torque increases, and the power also increases; with the increase of the initial vehicle speed, the corresponding initial wheel edge torque decreases, and the power also decreases to ensure the safety of the vehicle driving.

[0055] In addition, the initial calibration table corresponding to each vehicle driving mode can be different. For example, the power of the energy saving mode is lower than that of the sports mode, and for the same initial accelerator pedal opening and the same initial vehicle speed, the initial wheel edge torque queried in the initial calibration table corresponding to the energy saving mode can be less than the initial wheel edge torque queried in the initial calibration table corresponding to the sports mode.

[0056] S120, for each vehicle driving mode, obtaining power demand adjustment information of the vehicle driving mode, and determining the target accelerator pedal opening corresponding to each initial accelerator pedal opening at each initial vehicle speed in the initial calibration table based on the power demand adjustment information.

[0057] The power demand adjustment information can be adjustment information for the power demand determined according to the user feedback on the power of the vehicle, which can be power demand enhancement information or power demand reduction information. For example, if the user feedback on the power of the vehicle is that the power is too strong, the power demand adjustment information can be determined as power demand reduction information, and if the user feedback on the power of the vehicle is that the power is too low, the power demand adjustment information can be determined as power demand enhancement information.

[0058] Specifically, for each vehicle driving mode, the power demand adjustment information of each vehicle driving mode can be obtained. For example, the power demand adjustment information of the energy saving mode is power demand enhancement information, and the power demand adjustment information of the sports mode is power demand reduction information.

[0059] After obtaining the power demand adjustment information of each vehicle driving mode, for each vehicle driving mode, the target accelerator pedal opening corresponding to each initial accelerator pedal opening at each initial vehicle speed in the initial calibration table corresponding to the vehicle driving mode can be determined according to the power demand adjustment information of the vehicle driving mode. Specifically, the target accelerator pedal opening can be an adjustment target that needs to be adjusted to the initial accelerator pedal opening to meet the power demand.

[0060] Specifically, the initial acceleration pedal opening degree can be adjusted at each initial vehicle speed according to the power demand adjustment information, such as increasing the initial acceleration pedal opening degree or decreasing the initial acceleration pedal opening degree, to obtain a target acceleration pedal opening degree corresponding to the initial acceleration pedal opening degree at each initial vehicle speed, i.e., to obtain a target acceleration pedal opening degree corresponding to each initial acceleration pedal opening degree and each initial vehicle speed.

[0061] For example, if the power demand adjustment information is power demand enhancement information, the initial acceleration pedal opening degree can be increased to obtain a target acceleration pedal opening degree greater than the initial acceleration pedal opening degree; if the power demand adjustment information is power demand reduction information, the initial acceleration pedal opening degree can be decreased to obtain a target acceleration pedal opening degree less than the initial acceleration pedal opening degree.

[0062] In a specific embodiment, the power demand adjustment information of the vehicle driving mode is obtained, and the target acceleration pedal opening degree corresponding to each initial acceleration pedal opening degree in the initial calibration table at each initial vehicle speed is determined based on the power demand adjustment information, including:

[0063] If the power demand adjustment information of the vehicle driving mode is power demand enhancement information, a first preset opening degree adjustment value of the initial acceleration pedal opening degree at each initial vehicle speed is determined for each initial acceleration pedal opening degree in the initial calibration table; and the target acceleration pedal opening degree of the initial acceleration pedal opening degree at the initial vehicle speed is determined based on the sum of the initial acceleration pedal opening degree and the first preset opening degree adjustment value at the initial vehicle speed.

[0064] The first preset opening degree adjustment value can be the size of the initial acceleration pedal opening degree that needs to be increased. In this embodiment, the first preset opening degree adjustment value of different initial acceleration pedal opening degrees at different initial vehicle speeds can be different, and each first preset opening degree adjustment value can be preset.

[0065] Specifically, for each initial acceleration pedal opening degree, the first preset opening degree adjustment value of the initial acceleration pedal opening degree at each initial vehicle speed is summed with the initial acceleration pedal opening degree to obtain the target acceleration pedal opening degree corresponding to the initial acceleration pedal opening degree at each initial vehicle speed.

[0066] It should be noted that when the power demand adjustment information is power demand enhancement information, the sum of the initial acceleration pedal opening degree and the first preset opening degree adjustment value is used as the target acceleration pedal opening degree, which aims to obtain a target acceleration pedal opening degree greater than the initial acceleration pedal opening degree, and in subsequent operations, the initial wheel edge torque corresponding to the target acceleration pedal opening degree is used as the wheel edge torque corresponding to the initial acceleration pedal opening degree, thereby increasing the wheel edge torque corresponding to the initial acceleration pedal opening degree to enhance the vehicle power. Through the above method, the vehicle power can be enhanced.

[0067] It should be noted that, in the embodiment, the first preset opening adjustment value corresponding to the low initial vehicle speed can be greater than 0, so as to increase the initial accelerator pedal opening when the initial vehicle speed is low, and thus enhance the vehicle power when the initial vehicle speed is low; the first preset opening adjustment value corresponding to the high initial vehicle speed can be equal to 0 or less than 0, so as to keep or reduce the initial accelerator pedal opening when the initial vehicle speed is high, and thus not enhance the vehicle power when the initial vehicle speed is high, and ensure the vehicle driving safety.

[0068] In a specific implementation, the power demand adjustment information of the vehicle driving mode is acquired, and the target accelerator pedal opening corresponding to each initial accelerator pedal opening at each initial vehicle speed in the initial calibration table is determined based on the power demand adjustment information, and the method further includes:

[0069] If the power demand adjustment information of the vehicle driving mode is the power demand reduction information, for each initial accelerator pedal opening in the initial calibration table, a second preset opening adjustment value of the initial accelerator pedal opening at each initial vehicle speed is determined; and the target accelerator pedal opening of the initial accelerator pedal opening at the initial vehicle speed is determined based on the difference between the initial accelerator pedal opening and the second preset opening adjustment value of the initial accelerator pedal opening at the initial vehicle speed.

[0070] The second preset opening adjustment value can be the size of the initial accelerator pedal opening that needs to be reduced. In the embodiment, the second preset opening adjustment values of different initial accelerator pedal openings at different initial vehicle speeds can be different, and each second preset opening adjustment value can be preset.

[0071] Specifically, for each initial accelerator pedal opening, the initial accelerator pedal opening is subtracted from the second preset opening adjustment value of the initial accelerator pedal opening at each initial vehicle speed, and the target accelerator pedal opening corresponding to the initial accelerator pedal opening at each initial vehicle speed can be obtained.

[0072] It should be noted that, when the power demand adjustment information is the power demand reduction information, the difference between the initial accelerator pedal opening and the second preset opening adjustment value is used as the target accelerator pedal opening, so as to obtain the target accelerator pedal opening that is less than the initial accelerator pedal opening, and in subsequent operations, the initial wheel edge torque corresponding to the target accelerator pedal opening is used as the wheel edge torque corresponding to the initial accelerator pedal opening, and thus the wheel edge torque corresponding to the initial accelerator pedal opening is reduced, so as to reduce the vehicle power. Through the above method, the vehicle power can be weakened.

[0073] In the embodiment, in addition to setting different first preset opening adjustment values of the initial accelerator pedal opening at different initial vehicle speeds for each initial accelerator pedal opening, the first preset opening adjustment values of the initial accelerator pedal opening at different initial vehicle speeds can also be determined according to the adjustment level in the power demand adjustment information.

[0074] Optionally, the first preset opening adjustment values of the initial accelerator pedal opening at different initial vehicle speeds are determined based on the enhancement level in the power demand enhancement information.

[0075] Correspondingly, the second preset opening adjustment values of the initial accelerator pedal opening at different initial vehicle speeds are determined based on the reduction level in the power demand reduction information.

[0076] The higher the enhancement level is, the more the enhancement degree of the vehicle power is. Specifically, the first preset opening adjustment values of each initial accelerator pedal opening at different initial vehicle speeds corresponding to different levels can be set in advance, and then when the first preset opening adjustment values are to be determined, the corresponding first preset opening adjustment values can be directly matched according to the enhancement level.

[0077] The higher the reduction level is, the more the weakening degree of the vehicle power is. Specifically, the second preset opening adjustment values of each initial accelerator pedal opening at different initial vehicle speeds corresponding to different levels can be set in advance, and then when the second preset opening adjustment values are to be determined, the corresponding second preset opening adjustment values can be directly matched according to the reduction level.

[0078] In the above manner, the first preset opening adjustment values and the second preset opening adjustment values can be accurately determined, the accuracy of the target accelerator pedal opening is improved, and the accuracy of the target wheel edge torque corresponding to the initial accelerator pedal opening is improved.

[0079] S130, based on the target accelerator pedal opening corresponding to each initial accelerator pedal opening at different initial vehicle speeds, a virtual pedal opening correction table corresponding to the vehicle driving mode is generated.

[0080] After obtaining the target accelerator pedal opening corresponding to each initial accelerator pedal opening at different initial vehicle speeds in the initial calibration table, a corresponding virtual pedal opening correction table can be generated based on the corresponding relationship between each initial accelerator pedal, each initial vehicle speed and each target accelerator pedal. The virtual pedal opening correction table is used to describe the modified accelerator pedal opening of each initial accelerator pedal opening.

[0081] Specifically, the virtual pedal opening correction table includes target accelerator pedal openings corresponding to each initial accelerator pedal opening at each initial vehicle speed. For example, Table 2 shows part of the information in a virtual pedal opening correction table.

[0082] Referring to Table 2, Table 2 takes the power demand adjustment information as an example of power demand enhancement information, wherein the horizontal axis represents initial vehicle speed, the vertical axis represents initial accelerator pedal opening, and each value in the table represents a target accelerator pedal opening corresponding to each initial accelerator pedal opening at each initial vehicle speed.

[0083] Table 2 shows part of the information in a virtual pedal opening correction table.

[0084]

[0085]

[0086] For example, when the initial accelerator pedal opening is 10% and the initial vehicle speed is 0 km / h, the corresponding target accelerator pedal opening is 13%. When the initial accelerator pedal opening is 30% and the initial vehicle speed is 20 km / h, the corresponding target accelerator pedal opening is 32%.

[0087] In the above manner, a virtual pedal opening correction table corresponding to each vehicle driving mode can be generated. Of course, if a vehicle driving mode does not need to adjust the power, i.e., no power demand adjustment information of the vehicle driving mode is obtained, the virtual pedal opening correction table corresponding to the vehicle driving mode can not be generated.

[0088] S140, determining, according to the initial calibration table and the virtual pedal opening correction table, a target wheel edge torque corresponding to each initial accelerator pedal opening at each initial vehicle speed in the initial calibration table.

[0089] After obtaining the virtual pedal opening correction table, a target wheel edge torque corresponding to each initial accelerator pedal opening at each initial vehicle speed can be determined through the virtual pedal opening correction table. The target wheel edge torque is the wheel edge torque controlled when the vehicle is running.

[0090] In this embodiment, for each initial accelerator pedal opening in the initial calibration table, a target accelerator pedal opening corresponding to each initial vehicle speed is determined based on the virtual pedal opening correction table, and then an initial wheel edge torque corresponding to the target accelerator pedal opening is taken as a target wheel edge torque corresponding to the initial accelerator pedal opening.

[0091] It should be noted that in the process of determining the target wheel edge torque corresponding to each initial accelerator pedal opening at each initial vehicle speed, the method provided in the embodiment does not modify the initial calibration table in any way, but directly determines each target wheel edge torque according to the initial calibration table and the virtual pedal opening correction table.

[0092] Compared with the way that engineers recalibrate the initial calibration table in the prior art, the method provided in the embodiment does not lose the initial calibration table, so that the original information of the vehicle is preserved. Moreover, the method provided in the embodiment obtains the target wheel edge torque corresponding to each initial accelerator pedal opening based on the initial wheel edge torque corresponding to the target accelerator pedal opening in the initial calibration table, so that the initial calibration table is adjusted based on the existing information in the initial calibration table, and the rationality of the adjustment is ensured.

[0093] In a specific implementation, the target wheel edge torque corresponding to each initial accelerator pedal opening at each initial vehicle speed in the initial calibration table is determined according to the initial calibration table and the virtual pedal opening correction table, including:

[0094] For each initial accelerator pedal opening in the initial calibration table, the target accelerator pedal opening corresponding to the initial accelerator pedal opening at each initial vehicle speed is determined according to the virtual pedal opening correction table; for the target accelerator pedal opening corresponding to each initial vehicle speed, the initial wheel edge torque corresponding to the initial accelerator pedal opening equal to the target accelerator pedal opening at the initial vehicle speed is determined according to the initial calibration table, to obtain the target wheel edge torque corresponding to the initial accelerator pedal opening at the initial vehicle speed.

[0095] Specifically, for each initial accelerator pedal opening, the target accelerator pedal opening corresponding to the initial accelerator pedal opening at each initial vehicle speed can be first queried from the virtual pedal opening correction table, and then the initial wheel edge torque corresponding to the target accelerator pedal opening at the initial vehicle speed is further queried from the initial calibration table as the target wheel edge torque corresponding to the initial accelerator pedal opening at the initial vehicle speed.

[0096] In the above manner, the target wheel edge torque corresponding to each initial accelerator pedal opening at each initial vehicle speed can be accurately determined, and the adjustment accuracy of the vehicle power performance is ensured.

[0097] It should be noted that since the initial calibration table contains the initial wheel edge torque corresponding to part of the initial accelerator pedal opening at each initial vehicle speed, the initial wheel edge torque corresponding to the target accelerator pedal opening cannot be directly queried from the initial calibration table. In this case, the corresponding initial wheel edge torque can be calculated from the initial calibration table based on the difference method.

[0098] Optionally, for each target accelerator pedal opening corresponding to an initial vehicle speed, the initial wheel side torque corresponding to the initial accelerator pedal opening equal to the target accelerator pedal opening at the initial vehicle speed is determined according to the initial calibration table, including the following steps:

[0099] Step 1, for each target accelerator pedal opening corresponding to an initial vehicle speed, the initial accelerator pedal opening equal to the target accelerator pedal opening is queried in the initial calibration table;

[0100] Step 2, if the initial accelerator pedal opening equal to the target accelerator pedal opening does not exist in the initial calibration table, the two initial accelerator pedal openings adjacent to the target accelerator pedal opening are taken as the reference accelerator pedal openings, and the initial wheel side torque corresponding to each reference accelerator pedal opening at the initial vehicle speed is taken as the reference wheel side torque;

[0101] Step 3, based on the difference between the reference wheel side torques and the difference between the reference accelerator pedal openings, the wheel side torque change corresponding to a single pedal opening is determined;

[0102] Step 4, based on the difference between the target accelerator pedal opening and the reference accelerator pedal opening and the wheel side torque change corresponding to a single pedal opening, the initial wheel side torque corresponding to the initial accelerator pedal opening equal to the target accelerator pedal opening at the initial vehicle speed is determined.

[0103] Specifically, the initial accelerator pedal opening equal to the target accelerator pedal opening can be queried in the initial calibration table first, and if the initial accelerator pedal opening equal to the target accelerator pedal opening does not exist, the two initial accelerator pedal openings closest to the target accelerator pedal opening are further found as the reference accelerator pedal openings.

[0104] Further, the initial wheel side torque corresponding to each reference accelerator pedal opening at the initial vehicle speed is taken as the reference wheel side torque, the difference between the two reference wheel side torques and the difference between the two reference accelerator pedal openings are obtained, and then the wheel side torque change corresponding to a single pedal opening is calculated. Specifically, the ratio between the difference between the two reference wheel side torques and the difference between the two reference accelerator pedal openings can be taken as the wheel side torque change corresponding to a single pedal opening.

[0105] Further, the difference between the target accelerator pedal opening and the reference accelerator pedal opening is determined, the product of the difference and the wheel side torque change corresponding to a single pedal opening is taken as the wheel side torque difference between the target accelerator pedal opening and the reference accelerator pedal opening, and then the sum of the wheel side torque difference and the reference wheel side torque is taken as the initial wheel side torque corresponding to the target accelerator pedal opening at the initial vehicle speed.

[0106] For example, taking the data shown in Table 1 and Table 2 as an example, when the initial accelerator pedal opening degree is 10% and the vehicle speed is 0 km / h, the corresponding target accelerator pedal opening degree is 13%. Further, the initial calibration table can take 10% and 15% as reference accelerator pedal opening degrees, and when the initial accelerator pedal opening degree is 10% and the vehicle speed is 0 km / h, the corresponding reference wheel edge torque is 105 Nm, and when the initial accelerator pedal opening degree is 15% and the vehicle speed is 0 km / h, the corresponding reference wheel edge torque is 166 Nm, the wheel edge torque change corresponding to a single pedal opening degree is (166-105) / (15-10) = 12.2, and the initial wheel edge torque corresponding to the target accelerator pedal opening degree of 13% is 105 Nm + 12.2*(13-10) = 141.6 Nm.

[0107] In the above manner, the initial wheel edge torque corresponding to the target accelerator pedal opening degree at each initial vehicle speed based on the difference method can be determined, and the wheel edge torque corresponding to each initial accelerator pedal opening degree can be corrected.

[0108] The method provided in this embodiment can correct the initial calibration table in each vehicle driving mode without affecting the initial calibration table, and obtain the target wheel edge torque corresponding to each initial accelerator pedal opening degree at each initial vehicle speed. For example, the initial calibration table can be corrected before the vehicle is mass-produced, that is, in the testing stage of the vehicle, or the initial calibration table can be corrected after the vehicle is mass-produced and sold according to user feedback.

[0109] Optionally, after generating the virtual pedal opening correction table corresponding to each vehicle driving mode, the method provided in this embodiment further includes: generating an online upgrade file through each virtual pedal opening correction table, and issuing the online upgrade file to each vehicle, so that each vehicle determines the required wheel edge torque corresponding to the current accelerator pedal opening degree at the current vehicle speed according to the initial calibration table corresponding to the vehicle driving mode and the virtual pedal opening correction table.

[0110] The online upgrade file can be used to save each virtual pedal opening correction table in the vehicle. Specifically, each online upgrade file can be issued to each vehicle through OTA (Over-the-Air Technology).

[0111] Further, each vehicle can save each virtual pedal opening correction table, and when the vehicle needs to control the wheel edge torque, determine the required wheel edge torque corresponding to the current accelerator pedal opening degree and the current vehicle speed according to the initial calibration table corresponding to the vehicle driving mode and the virtual pedal opening correction table, and then control the vehicle through the required wheel edge torque.

[0112] By the above manner, the initial calibration table can be corrected after the vehicle is mass-produced and sold, the power performance of the vehicle is adjusted, and the driving experience of the user is further improved.

[0113] The embodiment can also correct the initial calibration table of each vehicle driving mode of different vehicle types according to the vehicle type. For example, in a specific implementation, the initial calibration table corresponding to each vehicle driving mode is obtained, including:

[0114] For each vehicle type, the initial calibration table corresponding to each vehicle driving mode of the vehicle type is obtained to obtain the virtual pedal opening correction table corresponding to each vehicle driving mode of the vehicle type.

[0115] Correspondingly, the online upgrade file is generated through each virtual pedal opening correction table, and the online upgrade file is distributed to each vehicle, including:

[0116] For each vehicle type, the online upgrade file corresponding to the vehicle type is generated through the virtual pedal opening correction table corresponding to the vehicle type, and the online upgrade file is distributed to each vehicle corresponding to the vehicle type.

[0117] That is, the initial calibration table corresponding to each vehicle driving mode of each vehicle type can be obtained, and then the virtual pedal opening correction table corresponding to each vehicle driving mode is determined according to the power performance demand adjustment information of each vehicle driving mode.

[0118] Further, for each vehicle type, the online upgrade file can be generated according to the virtual pedal opening correction table corresponding to the vehicle type and distributed to each vehicle corresponding to the vehicle type.

[0119] By the above manner, the initial calibration table is corrected based on the vehicle type, the power performance adjustment of the vehicle type is realized, and the driving experience of the user is further improved.

[0120] The vehicle wheel edge torque determination method provided by the embodiment of the application comprises the following steps: obtaining an initial calibration table corresponding to each vehicle driving mode; for each vehicle driving mode, determining a target accelerator pedal opening degree corresponding to each initial accelerator pedal opening degree at each initial vehicle speed according to power demand adjustment information of the vehicle driving mode, generating a virtual pedal opening degree correction table; and determining a target wheel edge torque corresponding to each initial accelerator pedal opening degree at each initial vehicle speed in the initial calibration table through the initial calibration table and the virtual pedal opening degree correction table, so as to correct each initial wheel edge torque in the initial calibration table. The method can determine each target wheel edge torque through the virtual pedal opening degree correction table and the initial calibration table without affecting the initial calibration table, without the need for engineers to re-calibrate, and is high in calibration efficiency. In addition, the method avoids modification of original data of the vehicle, does not need to re-calibrate shift points and re-optimize NVH, and does not affect the original driving style.

[0121] Figure 2 FIG. 1 is a structural schematic diagram of an electronic device provided by an embodiment of the application. As shown in FIG. 1, the electronic device 500 comprises one or more processors 501 and a memory 502. Figure 2

[0122] The processor 501 can be a central processing unit (CPU) or other forms of processing units having data processing and / or instruction execution capabilities, and can control other components in the electronic device 500 to perform desired functions.

[0123] The memory 502 can comprise one or more computer program products, which can comprise various forms of computer readable storage media, such as volatile memory and / or non-volatile memory. The volatile memory can comprise, for example, random access memory (RAM), cache memory and the like. The non-volatile memory can comprise, for example, read-only memory (ROM), hard disk, flash memory and the like. One or more computer program instructions can be stored on the computer readable storage medium, and the processor 501 can run the program instructions to implement the vehicle wheel edge torque determination method of any embodiment of the application described above and / or other desired functions. Various contents such as initial external parameters, threshold values and the like can also be stored in the computer readable storage medium.

[0124] ​In one example, the electronic device 500 can further include an input device 503 and an output device 504, which are interconnected to each other through a bus system and / or other forms of connection mechanisms (not shown). The input device 503 can include, for example, a keyboard, a mouse, and the like. The output device 504 can output various information, including pre-warning prompt information, braking force, and the like, to the outside. The output device 504 can include, for example, a display, a speaker, a printer, a communication network and a remote output device connected thereto, and the like.

[0125] Of course, in order to simplify, Figure 2 Only some of the components in the electronic device 500 related to the present application are shown in the middle, and components such as buses, input / output interfaces, and the like are omitted. In addition, the electronic device 500 can further include any other appropriate components according to specific application cases.

[0126] In addition to the above method and device, the embodiments of the present application can also be a computer program product, which includes computer program instructions, which, when executed by a processor, cause the processor to perform the steps of the vehicle wheel edge torque determination method provided by any embodiment of the present application.

[0127] The computer program product can be written in any combination of one or more programming languages, including object-oriented programming languages, such as Java, C++, and the like, and conventional procedural programming languages, such as "C" language or similar programming languages. The program code can be executed entirely on a user computing device, partially on a user device, as an independent software package, partially on a user computing device and partially on a remote computing device, or entirely on a remote computing device or server.

[0128] In addition, the embodiments of the present application can also be a computer readable storage medium, which stores computer program instructions, which, when executed by a processor, cause the processor to perform the steps of the vehicle wheel edge torque determination method provided by any embodiment of the present application.

[0129] The computer readable storage medium can be any combination of one or more computer readable medium(s). The 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 electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any suitable combination of the foregoing. More specific examples (a non-exhaustive list) of the computer readable storage medium include an electrical connection having one or more wires, a portable disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.

[0130] It should be noted that the terms "comprises", "comprising", "includes", "including", or any other variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus. An element proceeded by "comprises a", "comprising", "includes", "including", or "has" does not, without more constraints, preclude the existence of additional identical elements other than the listed elements.

[0131] It should also be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like, specify relative positions or orientations based on the orientations or positions shown in the drawings, and are used only for the purpose of convenience and simplification of the description, and do not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the application. Unless otherwise explicitly specified and limited, the terms "mount", "connect", "connection" and the like should be interpreted broadly, for example, can be fixed connection, can also be detachable connection, or integral connection; can be mechanical connection, can also be electrical connection; can be direct connection, can also be indirect connection through an intermediate medium, can be internal connection of two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0132] The principles and implementation manners of the present application are described herein by using specific examples, and the above example descriptions are only used to help understand the method of the present application and its core idea. The above descriptions are only preferred embodiments of the present application, and it should be pointed out that, due to the limited nature of the language expression, there are objectively infinite specific structures, and for ordinary skilled persons in the technical field, some improvements, refinements or changes can be made without departing from the principles of the present application, and the above technical features can also be combined in an appropriate manner; these improvements, refinements, changes or combinations, or the direct application of the inventive concept and technical solution to other occasions without improvement, shall be regarded as the protection scope of the present application.

Claims

1. A method of determining vehicle wheel side torque, characterized by, The method comprises: obtaining an initial calibration table corresponding to each vehicle driving mode, wherein the initial calibration table is used to describe an initial wheel edge torque corresponding to each initial accelerator pedal opening at each initial vehicle speed; for each vehicle driving mode, obtaining power demand adjustment information of the vehicle driving mode, and determining a target accelerator pedal opening corresponding to each initial accelerator pedal opening in the initial calibration table at each initial vehicle speed based on the power demand adjustment information; based on the target accelerator pedal opening corresponding to each initial accelerator pedal opening at each initial vehicle speed, generating a virtual pedal opening correction table corresponding to the vehicle driving mode; determining a target wheel edge torque corresponding to each initial accelerator pedal opening in the initial calibration table at each initial vehicle speed according to the initial calibration table and the virtual pedal opening correction table; if the user feedback on the power of the vehicle is that the power is too strong, the power demand adjustment information is determined as power demand reduction information, and if the user feedback on the power of the vehicle is that the power is too low, the power demand adjustment information is determined as power demand enhancement information; if the power demand adjustment information is power demand enhancement information, the initial accelerator pedal opening is increased to obtain a target accelerator pedal opening greater than the initial accelerator pedal opening, so as to increase the wheel edge torque corresponding to the initial accelerator pedal opening and enhance the power of the vehicle; if the power demand adjustment information is power demand reduction information, the initial accelerator pedal opening is reduced to obtain a target accelerator pedal opening less than the initial accelerator pedal opening, so as to reduce the wheel edge torque corresponding to the initial accelerator pedal opening and reduce the power of the vehicle.

2. The method of claim 1, wherein, The method comprises: if the power demand adjustment information of the vehicle driving mode is power demand enhancement information, for each initial accelerator pedal opening in the initial calibration table, a first preset opening adjustment value of the initial accelerator pedal opening at each initial vehicle speed is determined; based on the sum of the initial accelerator pedal opening and the first preset opening adjustment value at the initial vehicle speed, a target accelerator pedal opening corresponding to the initial accelerator pedal opening at the initial vehicle speed is determined.

3. The method of claim 2, wherein, The method comprises: if the power demand adjustment information of the vehicle driving mode is power demand reduction information, for each initial accelerator pedal opening in the initial calibration table, a second preset opening adjustment value of the initial accelerator pedal opening at each initial vehicle speed is determined; determining a target accelerator pedal opening corresponding to the initial accelerator pedal opening at the initial vehicle speed based on a difference between the initial accelerator pedal opening and the second preset opening adjustment value at the initial vehicle speed.

4. The method of claim 3, wherein, The determining of the first preset opening adjustment value of the initial accelerator pedal opening at each initial vehicle speed comprises: determining the first preset opening adjustment value of the initial accelerator pedal opening at each initial vehicle speed based on an enhancement level in the power demand enhancement information; Correspondingly, the determining of the second preset opening adjustment value of the initial accelerator pedal opening at each initial vehicle speed comprises: determining the second preset opening adjustment value of the initial accelerator pedal opening at each initial vehicle speed based on a reduction level in the power demand reduction information.

5. The method of claim 1, wherein, The determining of the target wheel edge torque corresponding to each initial accelerator pedal opening at each initial vehicle speed in the initial calibration table according to the initial calibration table and the virtual pedal opening correction table comprises: for each initial accelerator pedal opening in the initial calibration table, determining a target accelerator pedal opening corresponding to the initial accelerator pedal opening at each initial vehicle speed according to the virtual pedal opening correction table; for each target accelerator pedal opening corresponding to each initial vehicle speed, determining an initial wheel edge torque corresponding to an initial accelerator pedal opening equal to the target accelerator pedal opening at the initial vehicle speed according to the initial calibration table, to obtain a target wheel edge torque corresponding to the initial accelerator pedal opening at the initial vehicle speed.

6. The method of claim 5, wherein, The determining of the initial wheel edge torque corresponding to the initial accelerator pedal opening equal to the target accelerator pedal opening at the initial vehicle speed according to the initial calibration table for each target accelerator pedal opening corresponding to each initial vehicle speed comprises: for each target accelerator pedal opening corresponding to each initial vehicle speed, querying an initial accelerator pedal opening identical to the target accelerator pedal opening in the initial calibration table; if there is no initial accelerator pedal opening identical to the target accelerator pedal opening in the initial calibration table, taking two initial accelerator pedal openings adjacent to the target accelerator pedal opening as each reference accelerator pedal opening, and taking an initial wheel edge torque corresponding to each reference accelerator pedal opening at the initial vehicle speed as each reference wheel edge torque; determining a wheel edge torque change corresponding to a single pedal opening based on a difference between each reference wheel edge torque and a difference between each reference accelerator pedal opening; determining an initial wheel edge torque corresponding to an initial accelerator pedal opening equal to the target accelerator pedal opening at the initial vehicle speed based on a difference between the target accelerator pedal opening and the reference accelerator pedal opening and the wheel edge torque change corresponding to the single pedal opening.

7. The method of claim 1, wherein, After the generating of the virtual pedal opening correction table corresponding to the vehicle driving mode, the method further comprises: The online upgrade file is generated according to the virtual pedal opening correction table, and the online upgrade file is sent to each vehicle, so that each vehicle determines the required wheel edge torque corresponding to the current accelerator pedal opening at the current vehicle speed according to the initial calibration table corresponding to the vehicle driving mode and the virtual pedal opening correction table.

8. The method of claim 7, wherein, The initial calibration table corresponding to each vehicle driving mode is obtained, including: For each vehicle type, the initial calibration table corresponding to each vehicle driving mode of the vehicle type is obtained to obtain the virtual pedal opening correction table corresponding to each vehicle driving mode of the vehicle type. Correspondingly, the online upgrade file is generated according to the virtual pedal opening correction table, and the online upgrade file is sent to each vehicle, including: For each vehicle type, the online upgrade file corresponding to the vehicle type is generated according to the virtual pedal opening correction table corresponding to the vehicle type, and the online upgrade file is sent to each vehicle corresponding to the vehicle type.

9. An electronic device, comprising: The electronic device includes: A processor and a memory; The processor calls the program or instruction stored in the memory to execute the steps of the vehicle wheel edge torque determination method according to any one of claims 1 to 8.

10. A computer-readable storage medium, characterized in that, The computer readable storage medium stores programs or instructions, which make the computer execute the steps of the vehicle wheel edge torque determination method according to any one of claims 1 to 8.

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