Vehicle control method and device, electronic equipment and vehicle

Abstract

The present disclosure relates to the technical field of vehicle control, and provides a vehicle control method and device, an electronic device and a vehicle. The method comprises: after a launch assist function is activated, obtaining a launch assist frequency and comparing the launch assist frequency with a preset frequency threshold; in response to determining that the launch assist frequency is less than the preset frequency threshold, controlling the vehicle to launch assist in accordance with a first power parameter; and in response to determining that the launch assist frequency is greater than or equal to the preset frequency threshold, controlling the vehicle to launch in accordance with a second power parameter; wherein the first power parameter and the second power parameter are both parameters for controlling motor driving, and the second power parameter is less than the first power parameter. In this way, when the launch assist frequency reaches the preset frequency threshold, the vehicle can be controlled to launch with greater driving force, and the protection of the power system can be achieved by avoiding the overheat of the power system caused by long-term frequent use of the first power parameter to control motor driving.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the technical field of vehicle control, and particularly relates to a vehicle control method and device, electronic equipment and vehicle. BACKGROUND

[0002] When the vehicle is launched, the maximum power parameter is output to the motor, and the maximum acceleration forward can be realized. However, if the launch function is used frequently for a long time, the service life of the battery will be shortened due to multiple output of the maximum power parameter, and even the cruising range of the vehicle will be affected.

[0003] Therefore, how to avoid the impact of the launch function on the power system for a long time becomes a technical problem to be solved. SUMMARY

[0004] Therefore, the purpose of the present disclosure is to provide a vehicle control method, device, electronic equipment and vehicle to solve the problem of the impact of the launch function on the power system for a long time in the prior art.

[0005] To achieve the above purpose, a first aspect of the present disclosure provides a vehicle control method, which comprises:

[0006] After the launch function is activated, the launch times are obtained, and the launch times are compared with a preset number threshold;

[0007] In response to determining that the launch times are less than the preset number threshold, the vehicle is launched according to a first power parameter;

[0008] In response to determining that the launch times are greater than or equal to the preset number threshold, the vehicle is started according to a second power parameter; wherein the first power parameter and the second power parameter are parameters for controlling the motor drive, and the second power parameter is less than the first power parameter.

[0009] In some embodiments, in response to determining that the launch times are less than the preset number threshold, the vehicle is launched according to the first power parameter, comprising:

[0010] In response to determining that the launch times are less than the preset number threshold, a first motor characteristic curve is obtained;

[0011] According to the first motor characteristic curve, a first power parameter corresponding to the current motor speed is determined, and the vehicle is launched according to the first power parameter.

[0012] In some embodiments, according to the first motor characteristic curve, a first power parameter corresponding to the current motor speed is determined, and the vehicle is launched according to the first power parameter, comprising:

[0013] determining a first motor speed threshold based on the first motor characteristic curve, and comparing the current motor speed with the first motor speed threshold;

[0014] in response to determining that the current motor speed is less than or equal to the first motor speed threshold, taking a first preset torque as the first power parameter;

[0015] in response to determining that the current motor speed is greater than the first motor speed threshold, taking a first torque value corresponding to the current motor speed in the first motor characteristic curve as the first power parameter;

[0016] controlling the motor based on the first power parameter to control the vehicle to launch.

[0017] In some embodiments, the controlling the vehicle to launch according to the second power parameter in response to determining that the number of launch starts is greater than or equal to a preset number threshold comprises:

[0018] in response to determining that the number of launch starts is greater than or equal to a preset number threshold, obtaining a second motor characteristic curve;

[0019] determining a second power parameter corresponding to the current motor speed according to the second motor characteristic curve, and controlling the vehicle to launch according to the second power parameter.

[0020] In some embodiments, the determining a second power parameter corresponding to the current motor speed according to the second motor characteristic curve, and controlling the vehicle to launch according to the second power parameter comprises:

[0021] determining a second motor speed threshold based on the second motor characteristic curve, and comparing the current motor speed with the second motor speed threshold;

[0022] in response to determining that the current motor speed is less than or equal to the second motor speed threshold, taking a second preset torque as the second power parameter;

[0023] in response to determining that the current motor speed is greater than the second motor speed threshold, taking a second torque value corresponding to the current motor speed in the second motor characteristic curve as the second power parameter;

[0024] controlling the motor based on the second power parameter to control the vehicle to launch.

[0025] In some embodiments, after the controlling the vehicle to launch according to the first power parameter in response to determining that the number of launch starts is less than a preset number threshold, the method further comprises:

[0026] recording the current launch start;

[0027] The number of times of the launch is superimposed with the current launch to obtain a superimposed number of times of the launch, and the superimposed number of times of the launch is stored.

[0028] In some embodiments, the process of activating the launch function comprises:

[0029] obtaining state information and gear information of the vehicle;

[0030] in response to determining that the state information is a stationary state and the gear information is a drive gear, obtaining a braking force and an accelerator pedal opening degree of the vehicle;

[0031] in response to determining that the braking force is greater than a preset braking force threshold and the accelerator pedal opening degree is greater than a preset opening degree threshold, obtaining a steering wheel turning angle;

[0032] in response to determining that the steering wheel turning angle is less than a preset turning angle threshold, comparing a received power parameter with a preset power threshold;

[0033] in response to determining that the received power parameter is greater than the preset power threshold, activating the launch function.

[0034] Based on the same inventive concept, a second aspect of the present disclosure provides a vehicle control device, comprising:

[0035] a comparison processing module configured to, after the launch function is activated, obtain a number of times of the launch, and compare the number of times of the launch with a preset number of times threshold;

[0036] a first control module configured to, in response to determining that the number of times of the launch is less than the preset number of times threshold, control the vehicle to launch according to a first power parameter;

[0037] a second control module configured to, in response to determining that the number of times of the launch is greater than or equal to the preset number of times threshold, control the vehicle to launch according to a second power parameter; wherein the first power parameter and the second power parameter are both parameters for controlling the motor to drive, and the second power parameter is less than the first power parameter.

[0038] Based on the same inventive concept, a third aspect of the present disclosure provides an electronic device, comprising a memory, a processor, and a computer program stored in the memory and executable by the processor, wherein the processor implements the method as described above when executing the computer program.

[0039] Based on the same inventive concept, a fourth aspect of the present disclosure provides a vehicle, comprising the vehicle control device of the second aspect or the electronic device of the third aspect.

[0040] As can be seen from the above, the vehicle control method, device, electronic equipment and vehicle provided by the present disclosure are provided. After the launch assist function is activated, the number of launch assist is obtained, and the number of launch assist is compared with the preset number threshold. When the number of launch assist is less than the preset number threshold, the vehicle is launched according to the first power parameter, and the motor drive is controlled according to the first power parameter, which can ensure that the user normally uses the launch assist function. When the number of launch assist is greater than or equal to the preset number threshold, the vehicle is launched according to the second power parameter; wherein the first power parameter and the second power parameter are parameters for controlling the motor drive, and the second power parameter is less than the first power parameter. In this way, when the number of launch assist reaches the preset number threshold, the motor drive is controlled according to the second power parameter which is less than the first power parameter, which can control the vehicle to start with greater driving force, and at the same time can avoid the situation that the first power parameter is used to control the motor drive for a long time and frequently, which causes the power system to overheat, thereby realizing the protection of the power system. BRIEF DESCRIPTION OF DRAWINGS

[0041] In order to more clearly illustrate the technical solutions in the present disclosure or the related art, the drawings needed to be used in the embodiments or the related art description will be briefly introduced. Obviously, the drawings in the following description are only embodiments of the present disclosure, and other drawings can be obtained by those skilled in the art without creative labor.

[0042] Figure 1 The flowchart of the vehicle control method of the embodiment of the present disclosure;

[0043] Figure 2 The schematic diagram of the motor characteristic curve of the embodiment of the present disclosure;

[0044] Figure 3 The structural schematic diagram of the launch assist control system of the embodiment of the present disclosure;

[0045] Figure 4 The flowchart of the launch assist control method of the embodiment of the present disclosure;

[0046] Figure 5 The flowchart of the launch assist number storage method of the embodiment of the present disclosure;

[0047] Figure 6 The structural schematic diagram of the vehicle control device of the embodiment of the present disclosure;

[0048] Figure 7 The structural schematic diagram of the electronic equipment of the embodiment of the present disclosure. DETAILED DESCRIPTION

[0049] In order to make the objects, technical solutions and advantages of the present disclosure clearer, the present disclosure will be described in further detail below with reference to specific embodiments and drawings.

[0050] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the embodiments of the present disclosure should be understood as the common meanings understood by those skilled in the art to which the present disclosure belongs. The terms "first", "second" and similar terms used in the embodiments of the present disclosure do not represent any order, number or importance, but are only used to distinguish different components. The terms "include" or "contain" and similar terms mean that the elements or objects before the terms encompass the elements or objects listed after the terms and their equivalents, and do not exclude other elements or objects. The terms "connect" or "connected" and similar terms are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. The terms "upper", "lower", "left", "right" and the like are only used to represent relative positional relationships, and when the absolute positions of the described objects are changed, the relative positional relationships may also be changed accordingly.

[0051] Based on the description of the background, for a pure electric vehicle, when in the launch mode, the vehicle starts with the maximum torque / power output, realizes maximum acceleration forward, and gives the user an extreme driving experience and driving pleasure. However, in the long run, for high-performance users, if the launch mode is frequently used, the long-term output of maximum torque will inevitably shorten the service life of the battery, and even affect the vehicle's range. For the electric drive system, the instantaneous peak torque will increase the pressure on the drive shaft and the reducer, and after exceeding a certain limit number of times, even in serious cases, it is easy to cause the drive shaft to break or the differential to be damaged.

[0052] The vehicle releases a large amount of energy in a very short time when starting in the launch mode, causing the battery temperature to rise sharply, so frequent large current discharge accelerates battery aging, thereby reducing the total cycle number of the battery. For the electric drive system, frequent output of maximum torque and maximum power causes the motor winding temperature to rise, resulting in overheating. In a short time, the maximum torque is output, the peak torque is transmitted to the wheel through the drive shaft, and due to the limitation of the mechanical stress of the drive shaft, frequent large torque impact will cause micro cracks in the material under high-intensity load, gradually accumulate, and cause the drive shaft to fail due to fatigue, overbend or even break. The differential not only has to transmit the powerful power torque from the motor during the launch process, but also has to coordinate the different speed requirements of the left and right wheels, and long-term use under peak torque can easily cause structural damage, such as shell cracking.

[0053] As described above, how to avoid the impact of the launch function on the power system when it is used frequently in the long term has become an important research problem.

[0054] Based on the above description, as Figure 1 shown, the vehicle control method proposed in this embodiment includes:

[0055] Step 101, after the launch function is activated, the launch times are obtained, and the launch times are compared with the preset number threshold.

[0056] In specific implementation, the launch times are the number of times that the vehicle is launched according to the maximum power parameter within the time range from the factory to the current time.

[0057] When the vehicle meets the starting condition and receives the maximum power parameter, the launch function is activated. In order to avoid the impact of the power system caused by frequently controlling the vehicle to launch according to the maximum power parameter for a long time, by judging whether the launch times reach the preset number threshold, it can be accurately judged whether the launch function of the vehicle reaches the frequent use number of times, so as to accurately judge whether controlling the vehicle to launch according to the maximum power parameter will affect the power system of the vehicle.

[0058] For example, the preset number threshold is 500 times. After the launch function is activated, the launch times are obtained, and it is judged whether the launch times reach 500 times. When the launch times are less than 500 times, it means that controlling the vehicle to launch according to the maximum power parameter will not affect the power system of the vehicle. When the launch times are greater than or equal to 500 times, it means that controlling the vehicle to launch according to the maximum power parameter will affect the power system of the vehicle.

[0059] Step 102, in response to determining that the launch times are less than the preset number threshold, controlling the vehicle to launch according to the first power parameter.

[0060] In specific implementation, the number threshold is a critical launch number of times that will affect the power system of the vehicle, which is preset. The first power parameter is the maximum power parameter that the motor can output. The first power parameter can be the maximum power or the maximum torque that the motor can output.

[0061] When the launch times are less than the preset number threshold, it means that controlling the vehicle to launch according to the maximum power parameter will not affect the power system of the vehicle. In this scenario, in order to ensure the driving demand of the user controlling the vehicle to launch, the vehicle is controlled to launch according to the first power parameter (i.e. the maximum power parameter).

[0062] For example, if the first power parameter (maximum power) is 200kW and the preset launch threshold is 500 launches, the vehicle will launch according to the first power parameter of 200kW after 350 launches. Similarly, if the first power parameter (maximum torque) is 340N·m and the preset launch threshold is 500 launches, the vehicle will launch according to the first power parameter of 340N·m after 350 launches.

[0063] Step 103: In response to determining that the number of launch starts is greater than or equal to a preset threshold, control the vehicle to start according to the second power parameter; wherein, the first power parameter and the second power parameter are both parameters for controlling the motor drive, and the second power parameter is less than the first power parameter.

[0064] In practice, the second power parameter is less than the first power parameter. In order to ensure that when the vehicle starts according to the second power parameter, the power system of the vehicle is not affected, while the user's driving needs for starting the vehicle with greater power are met to the greatest extent, the difference between the second power parameter and the first power parameter is a preset value.

[0065] For example, if the first power parameter (maximum power) is 200kW and the preset value is 10kW, then the second power parameter is 190kW. Similarly, if the first power parameter (maximum torque) is 340N·m and the preset value is 10N·m, then the second power parameter is 330N·m.

[0066] When the number of launch attempts exceeds or equals a preset threshold, it indicates that controlling the vehicle's launch according to the maximum power parameters will affect the vehicle's powertrain. In this scenario, in order to avoid affecting the vehicle's powertrain while maximizing the user's driving needs for a powerful launch, the vehicle is controlled to launch according to a second power parameter, which is less than the maximum power parameter.

[0067] For example, if the second power parameter (second power) is 190kW and the preset launch threshold is 500 launches, the vehicle will be controlled to start according to the second power parameter of 190kW after 500 launches. Similarly, if the second power parameter (second torque) is 330N·m and the preset launch threshold is 500 launches, the vehicle will be controlled to start according to the second power parameter of 330N·m after 500 launches.

[0068] Through the above embodiments, after the launch control function is activated, the number of launch attempts is obtained and compared with a preset threshold. When the number of launch attempts is less than the preset threshold, the vehicle launches according to a first power parameter, and the motor drive is also controlled according to the first power parameter, ensuring normal use of the launch control function by the user. When the number of launch attempts is greater than or equal to the preset threshold, the vehicle starts according to a second power parameter; wherein, both the first and second power parameters are parameters for controlling the motor drive, and the second power parameter is less than the first power parameter. In this way, when the number of launch attempts reaches the preset threshold, controlling the motor drive according to the second power parameter, which is less than the first power parameter, can control the vehicle to start with a larger driving force, while also avoiding overheating of the power system due to long-term and frequent use of the first power parameter to control the motor drive, thus protecting the power system.

[0069] In some embodiments, step 102 includes:

[0070] Step 1021: In response to determining that the number of launch starts is less than a preset threshold, the first motor characteristic curve is obtained.

[0071] Step 1022: Determine the first power parameter corresponding to the current motor speed based on the first motor characteristic curve, and control the vehicle launch start according to the first power parameter.

[0072] In specific implementation, the first motor characteristic curve is the relationship curve between motor speed and power parameters in launch start mode. Specifically, the first motor characteristic curve can be either the relationship curve between motor speed and power in launch start mode, or the relationship curve between motor speed and torque in launch start mode.

[0073] For example, when the first motor characteristic curve is the relationship curve between motor speed and power in launch start mode, when the number of launch starts is less than the preset number threshold, the first motor characteristic curve is obtained, the first power (maximum power) corresponding to the current motor speed is determined according to the first motor characteristic curve, and the vehicle launch start is controlled according to the first power.

[0074] For example, when the first motor characteristic curve is the relationship curve between motor speed and torque in launch start mode, when the number of launch starts is less than the preset number threshold, the first motor characteristic curve is obtained, the first torque (maximum torque) corresponding to the current motor speed is determined according to the first motor characteristic curve, and the vehicle launch start is controlled according to the first torque.

[0075] Through the above scheme, the first motor characteristic curve is the relationship curve between motor speed and power parameters in launch control mode. In this way, when the number of launch starts is less than a preset threshold, the first power parameter (maximum power parameter) can be accurately obtained based on the first motor characteristic curve. Therefore, the vehicle launch can be controlled according to the first power parameter, thereby meeting the user's driving needs for controlling the vehicle launch.

[0076] In some embodiments, step 1022 includes:

[0077] Step 1022A: Determine the first motor speed threshold based on the first motor characteristic curve, and compare the current motor speed with the first motor speed threshold.

[0078] Step 1022B: In response to determining that the current motor speed is less than or equal to the first motor speed threshold, the first preset torque is used as the first power parameter.

[0079] Step 1022C: In response to determining that the current motor speed is greater than the first motor speed threshold, the first torque value corresponding to the current motor speed in the first motor characteristic curve is used as the first power parameter.

[0080] Step 1022D: Control the motor based on the first power parameters to control the vehicle launch start.

[0081] In practice, Figure 2 This is a schematic diagram of the motor characteristic curves according to an embodiment of this disclosure. Figure 2 As shown, Figure 2 Curve 1 in the figure is the characteristic curve of the first motor, where the horizontal axis is the motor speed and the vertical axis is the power parameter (torque).

[0082] exist Figure 2 In curve 1, the first motor speed threshold is motor speed N1. When the current motor speed is less than or equal to motor speed N1, the first preset torque Tmax1 is used as the first power parameter (first torque). When the current motor speed is greater than motor speed N1, the first torque value corresponding to the current motor speed on curve 1 is used as the first power parameter (first torque). The first power parameter (first torque) is output to the motor, and the motor is controlled based on the first power parameter (first torque) to achieve launch control of the vehicle.

[0083] With the above scheme, when the current motor speed is less than or equal to the first motor speed threshold, the first preset torque is used as the first power parameter; when the current motor speed is greater than the first motor speed threshold, the first torque value corresponding to the current motor speed in the first motor characteristic curve is used as the first power parameter. In this way, when the number of launch starts is less than the preset number threshold, the first power parameter can be accurately obtained according to the first motor characteristic curve, and the motor can be controlled based on the first power parameter to achieve launch start of the vehicle.

[0084] In some embodiments, step 103 includes:

[0085] Step 1031: In response to determining that the number of launch starts is greater than or equal to a preset threshold number, the second motor characteristic curve is obtained.

[0086] Step 1032: Determine the second power parameter corresponding to the current motor speed based on the second motor characteristic curve, and control the vehicle to start according to the second power parameter.

[0087] In specific implementation, the second motor characteristic curve is the relationship curve between motor speed and power parameters under the higher power start-up mode. Specifically, the second motor characteristic curve can be either the relationship curve between motor speed and power under the higher power start-up mode, or the relationship curve between motor speed and torque under the higher power start-up mode.

[0088] For example, when the second motor characteristic curve is the relationship curve between motor speed and power in the mode of starting with greater power, when the number of launch starts is greater than or equal to the preset number threshold, the second motor characteristic curve is obtained, the second power (less than the first power) corresponding to the current motor speed is determined according to the second motor characteristic curve, and the vehicle is controlled to start with greater power according to the second power.

[0089] For example, when the characteristic curve of the second motor is the relationship curve between the motor speed and torque in the mode of starting with greater power, when the number of launch starts is greater than or equal to the preset number threshold, the characteristic curve of the second motor is obtained, the second torque (less than the first torque) corresponding to the current motor speed is determined according to the characteristic curve of the second motor, and the vehicle is controlled to start with greater power according to the second torque.

[0090] The above scheme establishes a second motor characteristic curve that represents the relationship between motor speed and power parameters under a higher power start-up mode. This allows for the accurate determination of the second power parameter (which is less than the first power parameter) based on the second motor characteristic curve when the number of launch starts exceeds or equals a preset threshold. This second power parameter enables the vehicle to start with higher power, thus maximizing the user's driving needs for a higher power start without affecting the vehicle's powertrain.

[0091] In some embodiments, step 1032 includes:

[0092] Step 1032A: Determine the second motor speed threshold based on the second motor characteristic curve, and compare the current motor speed with the second motor speed threshold.

[0093] Step 1032B: In response to determining that the current motor speed is less than or equal to the second motor speed threshold, the second preset torque is used as the second power parameter.

[0094] Step 1032C: In response to determining that the current motor speed is greater than the second motor speed threshold, the second torque value corresponding to the current motor speed in the second motor characteristic curve is used as the second power parameter.

[0095] Step 1032D: Control the motor based on the second power parameters to control the vehicle to start.

[0096] In practice, Figure 2 This is a schematic diagram of the motor characteristic curves according to an embodiment of this disclosure. Figure 2 As shown, Figure 2 Curve 2 in the figure is the characteristic curve of the second motor, where the horizontal axis is the motor speed and the vertical axis is the power parameter (torque).

[0097] exist Figure 2 In curve 2, the second motor speed threshold is the motor speed N2. When the current motor speed is less than or equal to the motor speed N2, the second preset torque Tmax2 is used as the second power parameter (second torque). When the current motor speed is greater than the motor speed N2, the second torque value corresponding to the current motor speed on curve 2 is used as the second power parameter (second torque). The second power parameter (second torque) is output to the motor, and the motor is controlled based on the second power parameter (second torque) to achieve vehicle start-up.

[0098] In addition, by Figure 2 It can be seen that when the current motor speed is the same, the first power parameter corresponding to the first motor characteristic curve is less than the second power parameter corresponding to the second motor characteristic curve. Therefore, when the number of launch starts is less than a preset threshold, the first power parameter (maximum power parameter) can be determined based on the first motor characteristic curve, and the vehicle launch start can be controlled according to the first power parameter to meet the user's driving needs for launch start control. When the number of launch starts is greater than or equal to the preset threshold, the second power parameter (less than the first power parameter) can be determined based on the second motor characteristic curve, and the vehicle start can be controlled according to the second power parameter, maximizing the satisfaction of the user's driving needs for a higher power start without affecting the vehicle's power system.

[0099] With the above scheme, when the current motor speed is less than or equal to the second motor speed threshold, the second preset torque is used as the second power parameter; when the current motor speed is greater than the second motor speed threshold, the second torque value corresponding to the current motor speed in the second motor characteristic curve is used as the second power parameter. In this way, when the number of launch starts is greater than or equal to the preset number threshold, the second power parameter can be accurately obtained according to the second motor characteristic curve. Based on the second power parameter, the motor is controlled to achieve a vehicle start with greater power.

[0100] In some embodiments, after step 102, the method further includes:

[0101] Step 102A: Record this ejection start.

[0102] Step 102B: The number of launch starts is superimposed with the current launch start to obtain the superimposed number of launch starts, and the superimposed number of launch starts is stored.

[0103] In practice, in order to accurately determine whether a vehicle has been using the launch start function frequently over a long period of time, the number of times the vehicle has been controlled to launch start between the time the vehicle leaves the factory and the current time is recorded and stored, so as to determine whether the vehicle has been using the launch start function frequently over a long period of time based on the number of launch starts.

[0104] After controlling the vehicle to launch from a standstill according to the first power parameters, record this launch start. Add the number of launch starts to this launch start to obtain the added launch start count, and store the added launch start count.

[0105] For example, the launch start count is 350. After controlling the vehicle to launch according to the first power parameter, one launch start is recorded. One launch start is added to the launch start count, resulting in a total launch start count of 351. The stored launch start count is then updated from 350 to 351.

[0106] The above scheme, after controlling the vehicle to launch according to the first power parameter, superimposes the number of launches with the current launch to obtain the superimposed number of launches. This allows for updating the stored number of launches, thereby accurately determining whether the vehicle has been using the launch start function frequently over a long period of time.

[0107] In some embodiments, the process of activating the ejection start function includes:

[0108] Step 1011: Obtain vehicle status information and gear information.

[0109] Step 1012: In response to determining that the state information is a stationary state and the gear information is a drive gear, obtain the vehicle's braking force and accelerator pedal opening.

[0110] Step 1013: In response to determining that the braking force is greater than a preset braking force threshold and the accelerator pedal opening is greater than a preset opening threshold, obtain the steering wheel angle.

[0111] Step 1014: In response to determining that the steering wheel angle is less than a preset angle threshold, the received power parameters are compared with the preset power threshold.

[0112] Step 1015: In response to determining that the received power parameters are greater than the preset power threshold, activate the launch start function.

[0113] In practice, the launch control system includes: a vehicle information acquisition module, a vehicle controller, a battery management system, and a motor control module. The vehicle information acquisition module collects vehicle information and sends it to the vehicle controller. This vehicle information includes: vehicle status information, gear information, braking force, accelerator pedal opening, and steering wheel angle. The vehicle controller includes launch control, launch count storage, and torque request functionality. The battery management system includes power control.

[0114] When the vehicle's status information is stationary, the gear information is in drive gear, the braking force is greater than the preset braking force threshold, the accelerator pedal opening is greater than the preset opening threshold, and the steering wheel angle is less than the preset steering angle threshold, then the vehicle is determined to be in a starting state.

[0115] After confirming that the vehicle is in a starting state, it is determined whether the start request is a launch start request. If the start request is a launch start request, the launch start function is activated. Specifically, if there is no fault in the power system, the received power parameters are compared with a preset power threshold. If the received power parameters are greater than the preset power threshold, the start request is determined to be a launch start request, and the launch start function is activated.

[0116] In addition, to more accurately determine whether a launch start request is a launch start request, the specific determination process for a launch start request includes: obtaining the original power parameters sent by the battery management system and the target power parameters received by the vehicle controller; comparing the original power parameters with a preset first power threshold and comparing the target power parameters with a preset second power threshold; in response to determining that the original power parameters are greater than or equal to the preset first power threshold and the target power parameters are greater than or equal to the preset second power threshold, the launch start request is determined to be a launch start request, and the launch start function is activated.

[0117] The preset first power threshold is greater than the preset second power threshold. For example, the preset first power threshold is 200 N·m, and the preset second power threshold is 195 N·m. When the original power parameter sent by the battery management system is 200 N·m and the target power parameter received by the vehicle controller is 196200 N·m, the launch control function is activated.

[0118] Using the above scheme, when the vehicle's status information is stationary, the gear information is in drive gear, the braking force is greater than a preset braking force threshold, the accelerator pedal opening is greater than a preset opening threshold, and the steering wheel angle is less than a preset steering angle threshold, the vehicle can be accurately determined to be in a starting state. After determining that the vehicle is in a starting state, when the received power parameters are greater than a preset power threshold, the starting request can be accurately determined to be a launch control request, thereby activating the launch control function.

[0119] Through the above embodiments, after the launch control function is activated, the number of launch attempts is obtained and compared with a preset threshold. When the number of launch attempts is less than the preset threshold, the vehicle launches according to a first power parameter, and the motor drive is also controlled according to the first power parameter, ensuring normal use of the launch control function by the user. When the number of launch attempts is greater than or equal to the preset threshold, the vehicle starts according to a second power parameter; wherein, both the first and second power parameters are parameters for controlling the motor drive, and the second power parameter is less than the first power parameter. In this way, when the number of launch attempts reaches the preset threshold, controlling the motor drive according to the second power parameter, which is less than the first power parameter, can control the vehicle to start with a larger driving force, while also avoiding overheating of the power system due to long-term and frequent use of the first power parameter to control the motor drive, thus protecting the power system.

[0120] It should be noted that the embodiments of this disclosure can also be further described in the following ways:

[0121] Figure 3 This is a schematic diagram of the catapult launch control system according to an embodiment of the present disclosure. Figure 3 As shown, the launch control system includes: a vehicle information acquisition module, a vehicle control unit (VCU), a battery management system (BMS), and a motor control module.

[0122] Specifically, the vehicle information acquisition module collects vehicle information including: vehicle speed, gear position, accelerator pedal status, brake pedal status, steering wheel angle, and powertrain faults. Power control is mainly achieved by the battery management system (BMS) calculating the charging and discharging power of the battery system based on the battery's terminal voltage and current. The launch control module is mainly used by the vehicle control unit (VCU) to control the launch function based on the vehicle information acquisition signals and BMS power. Launch start count storage mainly involves counting the number of launch starts after the vehicle leaves the factory and storing the total number of launch starts throughout its lifespan. The VCU torque request module calculates the VCU torque request and sends it to the motor control module via the CAN bus. The motor torque command drives the drive unit, using a fixed-ratio reduction gear between the motor and the drive wheels.

[0123] Figure 4 This is a flowchart of the catapult launch control method according to an embodiment of this disclosure. Figure 4 As shown, based on the collected vehicle information, if the vehicle is stationary, in drive gear, with the brake pedal depressed and braking force greater than a set braking force threshold (e.g., 3500 N·m), and simultaneously the accelerator pedal is depressed with an opening greater than a set opening threshold (e.g., 85%), and the steering wheel angle is sufficiently small, with no system malfunctions and the powertrain performance at its maximum (calculated based on battery charging and discharging power), then the launch control function is activated. If the accelerator pedal is released within a set time (e.g., 10 seconds), and the total number of launch starts is less than a set threshold (e.g., 500 times, the threshold being obtained based on powertrain durability test calibration and motor life assessment), then the motor operates according to external characteristic curve 1 (…). Figure 2 Curve 1) indicates that the vehicle accelerates, for example, at 200KW / 340Nm; if the total number of launch starts exceeds the set threshold, the motor will accelerate according to curve 2 (external characteristic curve). Figure 2 Curve 2) is executed, such as: 190KW / 330Nm. The external characteristic curve 1 of the motor sets the limit on the number of launches. After the limit is exceeded, acceleration is performed according to the external characteristic curve 2 of the motor. For the power system, the external characteristic curve 2 of the motor can prevent the power system from overheating under long-term use of launch start. Key components such as the drive shaft and differential are within the effective protection range. Therefore, throughout the entire life cycle of the vehicle, by controlling the power system to execute different peak torque and peak power, the purpose of not limiting the number of launch starts is achieved.

[0124] Specifically, in Figure 2In curve 1, the first motor speed threshold is motor speed N1. When the current motor speed is less than or equal to motor speed N1, the first preset torque Tmax1 is used as the first power parameter (first torque). When the current motor speed is greater than motor speed N1, the first torque value corresponding to the current motor speed on curve 1 is used as the first power parameter (first torque). The first power parameter (first torque) is output to the motor, and the motor is controlled based on the first power parameter (first torque) to achieve launch control of the vehicle.

[0125] exist Figure 2 In curve 2, the second motor speed threshold is the motor speed N2. When the current motor speed is less than or equal to the motor speed N2, the second preset torque Tmax2 is used as the second power parameter (second torque). When the current motor speed is greater than the motor speed N2, the second torque value corresponding to the current motor speed on curve 2 is used as the second power parameter (second torque). The second power parameter (second torque) is output to the motor, and the motor is controlled based on the second power parameter (second torque) to achieve vehicle start-up.

[0126] In addition, by Figure 2 It can be seen that when the current motor speed is the same, the first power parameter corresponding to the first motor characteristic curve is less than the second power parameter corresponding to the second motor characteristic curve. Therefore, when the number of launch starts is less than a preset threshold, the first power parameter (maximum power parameter) can be determined based on the first motor characteristic curve, and the vehicle launch start can be controlled according to the first power parameter to meet the user's driving needs for launch start control. When the number of launch starts is greater than or equal to the preset threshold, the second power parameter (less than the first power parameter) can be determined based on the second motor characteristic curve, and the vehicle start can be controlled according to the second power parameter, maximizing the satisfaction of the user's driving needs for a higher power start without affecting the vehicle's power system.

[0127] Figure 5 This is a flowchart of a method for storing the number of launch starts according to an embodiment of this disclosure. Figure 5 As shown, each launch start activation adds up to the launch start count, and so on. Throughout the vehicle's entire driving cycle, the launch start count is cumulatively calculated. The total number of launch starts is stored before the vehicle goes into sleep mode each time. Therefore, the number of launch starts is counted and stored from the moment the vehicle leaves the factory. By remembering the number of launch starts, the powertrain motor is controlled to execute different external characteristic curves, thereby protecting the powertrain.

[0128] Through the above embodiments, by storing and memorizing the number of times the vehicle can launch, and setting a threshold number (e.g., 500 times), the peak torque and power of the electric drive system are executed according to different external characteristic curves within and outside the set threshold number of times, and the battery management system is executed according to different power. This allows users to frequently use the launch start function, while also protecting the power system, effectively improving the driving experience and driving pleasure of the vehicle, and meeting the requirements of high-performance car owners.

[0129] It should be noted that the method of this disclosure embodiment can be executed by a single device, such as a computer or server. The method of this embodiment can also be applied to a distributed scenario, where multiple devices cooperate to complete the task. In such a distributed scenario, one of these devices may execute only one or more steps of the method of this disclosure embodiment, and the multiple devices will interact with each other to complete the method described.

[0130] It should be noted that the above description describes some embodiments of this disclosure. Other embodiments are within the scope of the appended claims. In some cases, the actions or steps recorded in the claims can be performed in a different order than that shown in the above embodiments and still achieve the desired result. Furthermore, the processes depicted in the drawings do not necessarily require a specific or sequential order to achieve the desired result. In some embodiments, multitasking and parallel processing are also possible or may be advantageous.

[0131] Based on the same inventive concept, corresponding to any of the above-described embodiments, this disclosure also provides a vehicle control device.

[0132] refer to Figure 6 The vehicle control device includes:

[0133] The comparison processing module 301 is configured to acquire the number of ejection starts after the ejection start function is activated, and compare the number of ejection starts with a preset number threshold.

[0134] The first control module 302 is configured to control the vehicle to launch according to the first power parameters in response to determining that the number of launch starts is less than a preset number threshold.

[0135] The second control module 303 is configured to control the vehicle to start according to a second power parameter in response to determining that the number of launch starts is greater than or equal to a preset threshold number; wherein the first power parameter and the second power parameter are both parameters for controlling the motor drive, and the second power parameter is less than the first power parameter.

[0136] In some embodiments, the first control module 302 includes:

[0137] The first curve acquisition unit is configured to acquire a first motor characteristic curve in response to determining that the number of launch starts is less than a preset number threshold.

[0138] The first power parameter determination unit is configured to determine the first power parameter corresponding to the current motor speed based on the first motor characteristic curve, and control the vehicle launch start according to the first power parameter.

[0139] In some embodiments, the first dynamic parameter determining unit includes:

[0140] The comparison processing subunit is configured to determine the first motor speed threshold based on the first motor characteristic curve, and compare the current motor speed with the first motor speed threshold.

[0141] The first power parameter determination subunit is configured to use the first preset torque as the first power parameter in response to determining that the current motor speed is less than or equal to the first motor speed threshold.

[0142] The first power parameter determination subunit is configured to, in response to determining that the current motor speed is greater than the first motor speed threshold, use the first torque value corresponding to the current motor speed in the first motor characteristic curve as the first power parameter.

[0143] The first control subunit is configured to control the motor based on the first power parameters to control the vehicle launch start.

[0144] In some embodiments, the second control module 303 includes:

[0145] The second curve acquisition unit is configured to acquire a second motor characteristic curve in response to determining that the number of launch starts is greater than or equal to a preset number threshold.

[0146] The second power parameter determination unit is configured to determine the second power parameter corresponding to the current motor speed based on the characteristic curve of the second motor, and control the vehicle to start according to the second power parameter.

[0147] In some embodiments, the second dynamic parameter determining unit includes:

[0148] The comparison processing subunit is configured to determine the second motor speed threshold based on the second motor characteristic curve, and compare the current motor speed with the second motor speed threshold.

[0149] The second power parameter determination subunit is configured to use the second preset torque as the second power parameter in response to determining that the current motor speed is less than or equal to the second motor speed threshold.

[0150] The second power parameter determination subunit is configured to, in response to determining that the current motor speed is greater than the second motor speed threshold, use the second torque value corresponding to the current motor speed in the second motor characteristic curve as the second power parameter.

[0151] The second control subunit is configured to control the motor based on the second power parameters to control the vehicle to start.

[0152] In some embodiments, after controlling the vehicle to launch according to the first power parameter in response to determining that the number of launch attempts is less than a preset threshold number, the device further includes:

[0153] The recording module is configured to record this launch start.

[0154] The superposition processing module is configured to superimpose the number of launch starts with the current launch start to obtain the superimposed number of launch starts, and store the superimposed number of launch starts.

[0155] In some embodiments, the apparatus further includes a function activation module, the function activation module comprising:

[0156] The first acquisition unit is configured to acquire vehicle status information and gear information;

[0157] The second acquisition unit is configured to acquire the vehicle's braking force and accelerator pedal opening in response to determining that the state information is a stationary state and the gear information is a drive gear.

[0158] The third acquisition unit is configured to acquire the steering wheel angle in response to determining that the braking force is greater than a preset braking force threshold and the accelerator pedal opening is greater than a preset opening threshold.

[0159] The comparison processing unit is configured to compare the received power parameters with the preset power threshold in response to determining that the steering wheel angle is less than a preset angle threshold.

[0160] The function activation unit is configured to activate the launch start function in response to determining that the received power parameters are greater than a preset power threshold.

[0161] For ease of description, the above apparatus is described in terms of its functions, divided into various modules. Of course, in implementing this disclosure, the functions of each module can be implemented in one or more software and / or hardware.

[0162] The apparatus of the above embodiments is used to implement the corresponding vehicle control method in any of the foregoing embodiments, and has the beneficial effects of the corresponding method embodiments, which will not be repeated here.

[0163] Based on the same inventive concept, corresponding to the methods of any of the above embodiments, this disclosure also provides an electronic device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the program to implement the vehicle control method described in any of the above embodiments.

[0164] Figure 7 This embodiment illustrates a more specific hardware structure of an electronic device, which may include a processor 1010, a memory 1020, an input / output interface 1030, a communication interface 1040, and a bus 1050. The processor 1010, memory 1020, input / output interface 1030, and communication interface 1040 are interconnected internally via the bus 1050.

[0165] The processor 1010 can be implemented using a general-purpose CPU (Central Processing Unit), microprocessor, application-specific integrated circuit (ASIC), or one or more integrated circuits, and is used to execute relevant programs to implement the technical solutions provided in the embodiments of this specification.

[0166] The memory 1020 can be implemented in the form of ROM (Read Only Memory), RAM (Random Access Memory), static storage device, dynamic storage device, etc. The memory 1020 can store the operating system and other applications. When the technical solutions provided in the embodiments of this specification are implemented by software or firmware, the relevant program code is stored in the memory 1020 and is called and executed by the processor 1010.

[0167] The input / output interface 1030 is used to connect input / output modules to realize information input and output. Input / output modules can be configured as components within the device (not shown in the figure) or externally connected to the device to provide corresponding functions. Input devices may include keyboards, mice, touchscreens, microphones, various sensors, etc., while output devices may include displays, speakers, vibrators, indicator lights, etc.

[0168] The communication interface 1040 is used to connect a communication module (not shown in the figure) to enable communication between this device and other devices. The communication module can communicate via wired means (such as USB (Universal Serial Bus), network cable, etc.) or wireless means (such as mobile network, WIFI (Wireless Fidelity), Bluetooth, etc.).

[0169] Bus 1050 includes a pathway for transmitting information between various components of the device, such as processor 1010, memory 1020, input / output interface 1030, and communication interface 1040.

[0170] It should be noted that although the above-described device only shows the processor 1010, memory 1020, input / output interface 1030, communication interface 1040, and bus 1050, in specific implementations, the device may also include other components necessary for normal operation. Furthermore, those skilled in the art will understand that the above-described device may only include the components necessary for implementing the embodiments of this specification, and not necessarily all the components shown in the figures.

[0171] The electronic devices described above are used to implement the corresponding vehicle control methods in any of the foregoing embodiments and have the beneficial effects of the corresponding method embodiments, which will not be repeated here.

[0172] Based on the same inventive concept, corresponding to the methods of any of the above embodiments, this disclosure also provides a non-transitory computer-readable storage medium that stores computer instructions for causing the computer to execute the vehicle control method as described in any of the above embodiments.

[0173] The computer-readable medium of this embodiment includes permanent and non-permanent, removable and non-removable media, and information storage can be implemented by any method or technology. Information can be computer-readable instructions, data structures, program modules, or other data. Examples of computer storage media include, but are not limited to, phase-change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technologies, CD-ROM, digital versatile optical disc (DVD) or other optical storage, magnetic tape, magnetic disk storage or other magnetic storage devices, or any other non-transfer medium that can be used to store information accessible by a computing device.

[0174] The computer instructions stored in the storage medium of the above embodiments are used to cause the computer to execute the vehicle control method as described in any of the above embodiments, and have the beneficial effects of the corresponding method embodiments, which will not be repeated here.

[0175] Based on the same inventive concept, corresponding to the methods of any of the above embodiments, this application also provides a vehicle, including the vehicle control device, or electronic device, or storage medium in the above embodiments, wherein the vehicle device implements the vehicle control method described in any of the above embodiments.

[0176] The vehicles described in the above embodiments are used to implement the vehicle control method described in any of the foregoing embodiments, and have the beneficial effects of the corresponding method embodiments, which will not be repeated here.

[0177] Based on the same inventive concept, corresponding to any of the above embodiments, this application also provides a computer program product, including computer program instructions. When the computer program instructions are run on a computer, the computer causes the computer to execute the vehicle control method as described in any of the above embodiments, and has the beneficial effects of the corresponding method embodiments, which will not be repeated here.

[0178] It is understood that before using the technical solutions of the various embodiments in this disclosure, users will be informed of the type, scope of use, and usage scenarios of the personal information involved in an appropriate manner, and user authorization will be obtained.

[0179] For example, upon receiving a user's active request, a prompt message is sent to the user to explicitly inform them that the requested operation will require the acquisition and use of the user's personal information. This allows the user to independently choose, based on the prompt message, whether to provide personal information to the software or hardware such as electronic devices, applications, servers, or storage media performing the operations of this disclosed technical solution.

[0180] As an optional but not limited implementation, in response to a user's active request, sending a prompt message to the user can be done via a pop-up window, where the prompt message can be presented in text format. Furthermore, the pop-up window can also include a selection control allowing the user to choose "agree" or "disagree" to provide personal information to the electronic device.

[0181] It is understood that the above notification and user authorization process are merely illustrative and do not constitute a limitation on the implementation of this disclosure. Other methods that comply with relevant laws and regulations may also be applied to the implementation of this disclosure.

[0182] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of this disclosure is limited to these examples; within the framework of this disclosure, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of different aspects of the embodiments of this disclosure as described above, which are not provided in detail for the sake of brevity.

[0183] Additionally, to simplify the description and discussion, and to avoid obscuring the embodiments of this disclosure, the provided drawings may or may not show well-known power / ground connections to integrated circuit (IC) chips and other components. Furthermore, the apparatus may be shown in block diagram form to avoid obscuring the embodiments of this disclosure, and this also takes into account the fact that the details of implementation of these block diagram apparatuses are highly dependent on the platform on which the embodiments of this disclosure will be implemented (i.e., these details should be fully understood by those skilled in the art). While specific details (e.g., circuitry) have been set forth to describe exemplary embodiments of this disclosure, it will be apparent to those skilled in the art that the embodiments of this disclosure may be implemented without these specific details or with variations thereof. Therefore, these descriptions should be considered illustrative rather than restrictive.

[0184] Although this disclosure has been described in conjunction with specific embodiments thereof, many substitutions, modifications, and variations of these embodiments will be apparent to those skilled in the art from the foregoing description. For example, other memory architectures (e.g., dynamic RAM (DRAM)) may be used with the embodiments discussed.

[0185] This disclosure is intended to cover all such substitutions, modifications, and variations that fall within the broad scope of this disclosure. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this disclosure should be included within the protection scope of this disclosure.

Claims

1. A vehicle control method, characterized in that, The method includes: After the launch start function is activated, the number of launch starts is obtained and compared with a preset number threshold. In response to determining that the number of launch starts is less than a preset threshold, the vehicle launch starts according to the first power parameter; In response to determining that the number of launch starts is greater than or equal to a preset threshold, the vehicle is controlled to start according to a second power parameter; wherein, the first power parameter and the second power parameter are both parameters for controlling the motor drive, and the second power parameter is less than the first power parameter; The step of responding to determining that the number of launch attempts is less than a preset threshold and controlling the vehicle launch according to the first power parameter includes: In response to determining that the number of launch attempts is less than a preset threshold, the first motor characteristic curve is obtained; The first power parameter corresponding to the current motor speed is determined based on the first motor characteristic curve, and the vehicle launch start is controlled according to the first power parameter. The step of determining the first power parameter corresponding to the current motor speed based on the first motor characteristic curve, and controlling the vehicle launch start according to the first power parameter, includes: The first motor speed threshold is determined based on the first motor characteristic curve, and the current motor speed is compared with the first motor speed threshold. In response to determining that the current motor speed is less than or equal to the first motor speed threshold, the first preset torque is used as the first power parameter; In response to determining that the current motor speed is greater than the first motor speed threshold, the first torque value corresponding to the current motor speed in the first motor characteristic curve is used as the first power parameter; The motor is controlled based on the first power parameters to control the vehicle's launch start.

2. The method according to claim 1, characterized in that, The step of responding to determining that the number of launch attempts is greater than or equal to a preset threshold number, and controlling the vehicle to start according to the second power parameter, includes: In response to determining that the number of launch attempts is greater than or equal to a preset threshold, the characteristic curve of the second motor is obtained; The second power parameters corresponding to the current motor speed are determined based on the second motor characteristic curve, and the vehicle is started according to the second power parameters.

3. The method according to claim 2, characterized in that, The step of determining the second power parameter corresponding to the current motor speed based on the second motor characteristic curve, and controlling the vehicle to start according to the second power parameter, includes: The second motor speed threshold is determined based on the second motor characteristic curve, and the current motor speed is compared with the second motor speed threshold. In response to determining that the current motor speed is less than or equal to the second motor speed threshold, the second preset torque is used as the second power parameter; In response to determining that the current motor speed is greater than the second motor speed threshold, the second torque value corresponding to the current motor speed in the second motor characteristic curve is used as the second power parameter; The motor is controlled based on the second power parameter to control the vehicle to start.

4. The method according to claim 1, characterized in that, After determining that the number of launch attempts is less than a preset threshold and controlling the vehicle to launch according to the first power parameters, the method further includes: Record this launch start; The number of launch starts is superimposed with the current launch start to obtain the superimposed number of launch starts, and the superimposed number of launch starts is stored.

5. The method according to claim 1, characterized in that, The process of activating the ejection launch function includes: Obtain vehicle status and gear information; In response to determining that the state information is a stationary state and the gear information is a drive gear, the vehicle's braking force and accelerator pedal opening are obtained; In response to determining that the braking force is greater than a preset braking force threshold and the accelerator pedal opening is greater than a preset opening threshold, the steering wheel angle is obtained; In response to determining that the steering wheel angle is less than a preset angle threshold, the received power parameters are compared with the preset power threshold. In response to the determination that the received power parameters are greater than the preset power threshold, the launch start function is activated.

6. A vehicle control device, characterized in that, include: The comparison processing module is configured to acquire the number of ejection starts after the ejection start function is activated, and compare the number of ejection starts with a preset number threshold. The first control module is configured to control the vehicle to launch according to the first power parameters in response to determining that the number of launch starts is less than a preset number threshold. The second control module is configured to control the vehicle to start according to a second power parameter in response to determining that the number of launch starts is greater than or equal to a preset threshold number; wherein the first power parameter and the second power parameter are both parameters for controlling the motor drive, and the second power parameter is less than the first power parameter; The first control module includes: The first curve acquisition unit is configured to acquire a first motor characteristic curve in response to determining that the number of launch starts is less than a preset number threshold. The first power parameter determination unit is configured to determine the first power parameter corresponding to the current motor speed based on the first motor characteristic curve, and control the vehicle launch start according to the first power parameter. The first dynamic parameter determination unit includes: The comparison processing subunit is configured to determine the first motor speed threshold based on the first motor characteristic curve, and compare the current motor speed with the first motor speed threshold. The first power parameter determination subunit is configured to use the first preset torque as the first power parameter in response to determining that the current motor speed is less than or equal to the first motor speed threshold. The first power parameter determination subunit is configured to, in response to determining that the current motor speed is greater than the first motor speed threshold, use the first torque value corresponding to the current motor speed in the first motor characteristic curve as the first power parameter. The first control subunit is configured to control the motor based on the first power parameters to control the vehicle launch start.

7. An electronic device, characterized in that, It includes a memory, a processor, and a computer program stored in the memory and running on the processor, wherein the processor, when executing the program, implements the method as claimed in any one of claims 1 to 5.

8. A vehicle, characterized in that, It includes the vehicle control device as described in claim 6 or the electronic device as described in claim 7.

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