CN-116605229-B - Vehicle control method and device and vehicle

CN116605229BCN 116605229 BCN116605229 BCN 116605229BCN-116605229-B

Abstract

The invention discloses a vehicle control method and device and a vehicle, and relates to the technical field of vehicles. The method comprises the steps of obtaining driving information, determining a target driving mode based on the driving information in a preset time interval, determining target torque based on the target driving mode, and controlling the vehicle based on the target torque, wherein the driving information is used for determining acceleration, accelerator opening state and brake pedal state of the vehicle. The method solves the technical problems of poor comprehensiveness, poor learning property, low lifting efficiency and poor experience of the driver caused by the fact that the driver is intervened or reminded by analyzing the driving habit in the related technology.

Inventors

SONG HAOYUAN
XU JIALIANG
LIU YUANZHI
CHENG JIAN
GUO DINGYI
YU DAWEI

Assignees

中国第一汽车股份有限公司

Dates

Publication Date: 20260512
Application Date: 20230620

Claims (7)

1. A control method of a vehicle, characterized by comprising: Acquiring driving information, wherein the driving information is used for determining acceleration, accelerator opening state and brake pedal state of a vehicle; Determining a target driving mode based on the driving information within a preset time interval, wherein the target driving mode is used for representing driving style and comprises a relaxing mode, a normal mode and a fierce mode; determining that the target driving mode is valid in response to the duty cycle of the target driving mode exceeding a preset duty cycle value within the preset time interval; determining corresponding drivability parameters according to the target driving mode; In response to the target driving mode being valid and the target driving mode being a comfort mode, determining a current weight coefficient learning value corresponding to the comfort mode as a weight coefficient learning value of a last working condition segment corresponding to the comfort mode plus a preset value, determining a current weight coefficient learning value corresponding to the normal mode as a weight coefficient learning value of a last working condition segment corresponding to the normal mode minus the preset value, and determining a weight coefficient learning value corresponding to the fierce mode as zero, wherein the last working condition segment is a previous working condition segment of the preset time interval, and the positive and negative of the preset value is determined according to the target driving mode; Calculating wheel end required torque based on the drivability parameter, the current weight coefficient learning value corresponding to the relaxation mode, the current weight coefficient learning value corresponding to the normal mode and the weight coefficient learning value corresponding to the fierce mode; Responding to the vehicle as a first type of vehicle, calculating a target torque according to the driving information and the wheel end required torque; or, in response to the vehicle being a second type vehicle, calculating a first target torque and a second target torque according to the wheel end required torque and a preset coefficient, and controlling the vehicle based on the first target torque and the second target torque.
2. The method of claim 1, wherein the determining a target driving pattern based on the driving information within a preset time interval comprises: calculating the change rate of the accelerator opening in unit time according to the state of the accelerator opening; And determining a target driving mode according to the acceleration, the accelerator opening state, the brake pedal state and the accelerator opening change rate in a preset time interval.
3. The method of claim 2, wherein the determining a target driving pattern from the acceleration, the accelerator opening state, the brake pedal state, and the accelerator opening change rate within a preset time interval comprises: Responding to the state of the accelerator opening degree to meet a first preset condition, wherein the change rate of the accelerator opening degree is smaller than or equal to a first change rate threshold value, or, And responding to the brake pedal state meeting a second preset condition, wherein the acceleration is larger than or equal to a first acceleration threshold value, and determining the target driving mode to be the relieving mode.
4. A method according to claim 3, wherein said determining a target driving pattern from said acceleration, said accelerator opening state within a preset time interval, said brake pedal state and said accelerator opening change rate comprises: Responding to the state of the accelerator opening degree to meet a first preset condition, wherein the change rate of the accelerator opening degree is larger than a first change rate threshold value and smaller than or equal to a second change rate threshold value, or, And determining that the target driving mode is the normal mode in response to the brake pedal state meeting a second preset condition, wherein the acceleration is smaller than a first acceleration threshold and larger than or equal to a second acceleration threshold.
5. A method according to claim 3, wherein said determining a target driving pattern from said acceleration, said accelerator opening state, said brake pedal state and said accelerator opening change rate within a preset time interval comprises: Responding to the state of the accelerator opening degree to meet a first preset condition, wherein the change rate of the accelerator opening degree is larger than a second change rate threshold value and smaller than or equal to a third change rate threshold value, or, And determining that the target driving mode is the fierce mode in response to the brake pedal state meeting a second preset condition, wherein the acceleration is smaller than a second acceleration threshold value and larger than or equal to a third acceleration threshold value.
6. A control device for a vehicle, comprising: the system comprises an acquisition module, a control module and a control module, wherein the acquisition module is used for acquiring driving information, and the driving information is used for determining acceleration, accelerator opening state and brake pedal state of a vehicle; The first determining module is used for determining a target driving mode based on the driving information in a preset time interval, wherein the target driving mode is used for representing a driving style and comprises a relaxing mode, a normal mode and a fierce mode; The device is further used for determining that the target driving mode is valid in response to the duty ratio of the target driving mode exceeding a preset duty ratio value in the preset time interval; The second determining module is used for determining a corresponding drivability parameter according to the target driving mode, determining a current weight coefficient learning value corresponding to the relief mode as a weight coefficient learning value of a last working condition section corresponding to the relief mode plus a preset value in response to the target driving mode being effective and the target driving mode being the relief mode, determining a current weight coefficient learning value corresponding to the normal mode as a weight coefficient learning value of a last working condition section corresponding to the normal mode minus the preset value, and determining a weight coefficient learning value corresponding to the fierce mode as zero, wherein the last working condition section is a previous working condition section of the preset time interval, and the positive and negative of the preset value are determined according to the target driving mode; a control module for controlling a vehicle based on the target torque; Or alternatively, the first and second heat exchangers may be, The second determining module is used for responding to the vehicle as a second type vehicle and calculating a first target torque and a second target torque according to the wheel end required torque and a preset coefficient, and the control module is used for controlling the vehicle based on the first target torque and the second target torque.
7. A vehicle for performing the control method of the vehicle according to any one of the above claims 1 to 5.

Description

Vehicle control method and device and vehicle Technical Field The invention relates to the technical field of vehicles, in particular to a vehicle control method and device and a vehicle. Background With the rapid development of vehicle technology, drivers are increasingly demanding diversified driving styles of vehicles. Different drivers have different driving style demands on the vehicle, and the driving style meeting the demands of the drivers can improve driving experience. Therefore, a control method for a vehicle is necessary. At present, intervention or reminding is carried out on a driver through different driving habit statistical methods and through analysis of driving habits, but the method only analyzes driving behavior data in partial driving time, so that comprehensiveness is poor, learning is poor, lifting efficiency is low, and experience of the driver is poor. In view of the above problems, no effective solution has been proposed at present. Disclosure of Invention The embodiment of the invention provides a vehicle control method and device and a vehicle, which at least solve the technical problems of poor comprehensiveness, poor learning, low lifting efficiency and poor experience of a driver caused by intervention or reminding of the driver by analyzing driving habits in the related technology. According to one embodiment of the invention, a control method of a vehicle is provided, which comprises the steps of obtaining driving information, determining a target driving mode based on the driving information in a preset time interval, determining a target torque based on the target driving mode, and controlling the vehicle based on the target torque, wherein the driving information is used for determining acceleration, accelerator opening state and brake pedal state of the vehicle. Optionally, determining the target driving mode based on the driving information in the preset time interval comprises calculating the change rate of the accelerator opening in unit time according to the state of the accelerator opening, and determining the target driving mode according to the acceleration, the state of the accelerator opening, the state of a brake pedal and the change rate of the accelerator opening in the preset time interval. Optionally, the target driving mode at least comprises one of a comfort mode, a normal mode and a fierce mode, wherein the target driving mode is determined according to acceleration, an accelerator opening state, a brake pedal state and an accelerator opening change rate in a preset time interval, and the target driving mode is determined to be the comfort mode in response to the accelerator opening state meeting a first preset condition and the accelerator opening change rate being smaller than or equal to a first change rate threshold value, or in response to the brake pedal state meeting a second preset condition and the acceleration being larger than or equal to a first acceleration threshold value. Optionally, determining the target driving mode according to the acceleration, the accelerator opening state, the brake pedal state and the accelerator opening change rate within the preset time interval comprises determining that the target driving mode is a normal mode in response to the accelerator opening state meeting a first preset condition and the accelerator opening change rate being greater than a first change rate threshold and less than or equal to a second change rate threshold, or in response to the brake pedal state meeting a second preset condition and the acceleration being less than a first acceleration threshold and greater than or equal to a second acceleration threshold. Optionally, determining the target driving mode according to the acceleration, the accelerator opening state, the brake pedal state and the accelerator opening change rate within the preset time interval comprises determining that the target driving mode is a fierce mode in response to the accelerator opening state meeting a first preset condition and the accelerator opening change rate being greater than a second change rate threshold and less than or equal to a third change rate threshold, or in response to the brake pedal state meeting a second preset condition and the acceleration being less than a second acceleration threshold and greater than or equal to a third acceleration threshold. Optionally, determining the target torque based on the target driving mode includes determining a wheel end demand torque from the target driving mode and determining the target torque from the wheel end demand torque. Optionally, determining the wheel end demand torque from the target driving pattern includes determining a corresponding drivability parameter and weighting factor from the target driving pattern and calculating the wheel end demand torque based on the drivability parameter and the weighting factor. Optionally, determining the target torque according to the wheel end demand torque