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CN-122009187-A - Method and device for adjusting speed regulation power of vehicle, vehicle and storage medium

CN122009187ACN 122009187 ACN122009187 ACN 122009187ACN-122009187-A

Abstract

The invention discloses a vehicle speed regulating power regulating method, a device, a vehicle and a storage medium, wherein the vehicle speed regulating power regulating method comprises the steps of obtaining a vehicle model, a driving mode and a driving switching working condition of the vehicle, responding to the vehicle model being a four-wheel drive vehicle model and the driving mode being a non-four-wheel drive mode, determining target front axle speed regulating power of the vehicle, determining the regulating speed of the front axle speed regulating power of the vehicle based on the driving switching working condition, and regulating the current front axle speed regulating power of the vehicle to the target front axle speed regulating power based on the regulating speed. The invention solves the technical problem of poor vehicle stability in the process of switching the driving modes of the vehicle in the prior art.

Inventors

  • XU JIALIANG

Assignees

  • 中国第一汽车股份有限公司

Dates

Publication Date
20260512
Application Date
20260325

Claims (10)

  1. 1. A method for regulating the regulated power of a vehicle, comprising: acquiring a vehicle model, a driving mode and a driving switching working condition of a vehicle; Determining a target front axle speed regulating power of the vehicle in response to the vehicle model being a four-wheel drive vehicle model and the drive mode being a non-four-wheel drive mode; determining the adjusting speed of the front axle speed adjusting power of the vehicle based on the driving switching working condition; and adjusting the current front axle regulating power of the vehicle to the target front axle regulating power based on the adjustment rate.
  2. 2. The method of adjusting vehicle throttle power of claim 1, wherein determining the target front axle throttle power in response to the vehicle model being the four-wheel drive vehicle model and the drive mode being the non-four-wheel drive mode comprises: acquiring battery discharge power, rear axle external machine characteristic power, front axle speed regulation required torque, acceleration correction power and a reserved coefficient of the vehicle; calculating a first front axle governor power of the vehicle based on the battery discharge power and the rear off-axis machine characteristic power; calculating a second front axle governor power of the vehicle based on the front axle governor demand torque and the acceleration correction power; calculating a third front axle speed regulation power of the vehicle based on the battery discharge power and the reserve coefficient; and determining the target front axle regulating power based on the first front axle regulating power, the second front axle regulating power and the third front axle regulating power.
  3. 3. The method of adjusting the vehicle throttle power of claim 2, wherein determining the adjustment rate of the front axle throttle power based on the drive switching condition comprises: responding to the driving switching working condition to switch from a four-wheel drive mode to a two-wheel drive mode, and acquiring the power transfer distribution rate and the rising adjustment rate of the vehicle; Determining whether a driving switching working condition of the vehicle is a target working condition, wherein the target working condition comprises a first working condition and a second working condition, the first working condition represents that the current total driving power of the vehicle is smaller than the battery discharging power, and the second working condition represents that the current speed of the vehicle is the maximum speed; determining that the adjustment rate is the power transfer allocation rate in response to the drive switching condition not being the target condition; Determining the adjustment rate as the power transfer allocation rate and the rising adjustment rate in response to the drive switching condition being the first condition; and in response to the drive switching condition being the second condition, determining the adjustment rate to be the rising adjustment rate.
  4. 4. The method of adjusting the vehicle throttle power of claim 3, wherein determining the adjustment rate of the front axle throttle power based on the drive switching condition further comprises: responding to the driving switching working condition to switch the two-drive mode to the four-drive mode, and acquiring the power filtering rate and the descending adjustment rate of the vehicle; Comparing the current rear axle driving power of the vehicle with the target rear axle driving power to obtain a first comparison result; Determining the adjustment rate to be the decreasing adjustment rate in response to the first comparison result characterizing that the current rear axle drive power is less than the target rear axle drive power; And determining that the adjustment rate is the power filtering rate in response to the first comparison result characterizing that the current rear axle drive power is greater than or equal to the target rear axle drive power.
  5. 5. The method of adjusting the vehicle speed adjustment power of claim 3, wherein adjusting the current front axle speed adjustment power of the vehicle to the target front axle speed adjustment power based on the adjustment rate comprises: Responding to the driving switching working condition as the first working condition, and acquiring the current front axle driving power and the current rear axle driving power of the vehicle; Determining an initial front axle governor power based on the current front axle drive power, the current rear axle drive power, the battery discharge power, and the target front axle governor power; adjusting the current front axle governor power to the initial front axle governor power based on the upward adjustment rate; The initial front axle regulated power is adjusted to the target front axle regulated power based on the power transfer split rate.
  6. 6. A method of regulating regulated power to a vehicle according to claim 3, further comprising: Acquiring a driving power distribution coefficient of the vehicle and external characteristic power of a front axle motor; Calculating an initial front axle drive power of the vehicle based on the drive power distribution coefficient, the battery discharge power, and the front axle motor external characteristic power; calculating a current rear axle drive power of the vehicle based on the battery discharge power, the initial front axle drive power, and the rear axle motor external characteristic power; Calculating a current front axle drive power of the vehicle based on the battery discharge power, the current rear axle drive power, and the front axle motor external characteristic power; the current total drive power is calculated based on the current front axle drive power and the current rear axle drive power.
  7. 7. The method of regulating vehicle regulated power according to claim 4, further comprising: Monitoring the battery state of the vehicle in real time; responding to the condition that the battery state is a fault state, comparing the current front axle speed regulating power with the third front axle speed regulating power to obtain a second comparison result; And in response to the second comparison result characterizing that the current front axle regulated power is greater than or equal to the third front axle regulated power, adjusting the current front axle regulated power to the third front axle regulated power based on the descent adjustment rate.
  8. 8. A vehicle speed control power adjustment device, comprising: the acquisition module is used for acquiring the vehicle model, the driving mode and the driving switching working condition of the vehicle; The first determining module is used for determining target front axle speed regulation power of the vehicle in response to the vehicle model being a four-wheel drive vehicle model and the driving mode being a non-four-wheel drive mode; The second determining module is used for determining the adjusting speed of the front axle speed adjusting power of the vehicle based on the driving switching working condition; And the first adjusting module is used for adjusting the current front axle speed adjusting power of the vehicle to the target front axle speed adjusting power based on the adjusting speed.
  9. 9. A vehicle comprising a memory and a processor, characterized in that the memory has stored therein a computer program, the processor being arranged to run the computer program to perform the method of regulating the regulated power of the vehicle according to any one of the preceding claims 1 to 7.
  10. 10. A computer-readable storage medium, characterized in that the computer-readable storage medium has stored therein a computer program, wherein the computer program is arranged to perform the method of regulating the regulated power of a vehicle according to any one of the preceding claims 1 to 7 when run on a computer or processor.

Description

Method and device for adjusting speed regulation power of vehicle, vehicle and storage medium Technical Field The invention relates to the technical field of automatic control, in particular to a method and a device for adjusting speed regulating power of a vehicle, the vehicle and a storage medium. Background In the technical field of new energy automobiles, multi-motor driving systems are widely used due to their excellent power performance and energy efficiency performance. The vehicle is generally provided with a plurality of driving modes such as two-drive driving mode, four-drive driving mode and the like, and the modes are required to be dynamically switched according to the driving working condition so as to meet the diversified requirements of users on power performance, economy and trafficability. In an actual application scene, the switching of the driving mode often occurs under complex working conditions such as rapid acceleration, abrupt change of road surface adhesion force or active intervention of a driver. At this time, the vehicle control system needs to complete the redistribution of the front and rear axle torque and the synchronization of the motor rotation speed in a very short time, which puts a very high demand on the response speed and smoothness of the control strategy. The user expects that the vehicle can keep stable posture during mode switching, and power output is continuous and no pause is realized to ensure driving safety and driving comfort. However, the prior art often lacks fine dynamic management of motor governor power regulation rate when performing drive mode switching control. The existing control strategy mostly adopts fixed power climbing or descending slope, and cannot be adaptively adjusted according to the real-time discharging capacity of a battery, the external characteristic limit of a motor and the actual difference of front and rear axle loads. The stiff control mode easily causes excessive speed or excessive slow speed of front axle intervention at the moment of switching, and causes excessive longitudinal impact of the whole vehicle, torsional vibration of a driving shaft and even wheel slip. Particularly, when the battery is in a limit state or the motor is close to a physical boundary, the prior art scheme is difficult to realize stable transition on the premise of ensuring the safety of the system, so that obvious power interruption or vehicle body shaking occurs in the mode switching process of the vehicle, and the running stability of the vehicle is seriously influenced. Aiming at the technical problems, no effective solution exists at present. Disclosure of Invention The embodiment of the invention provides a method and a device for adjusting vehicle speed regulating power, a vehicle and a storage medium, and aims to at least solve the technical problem of poor vehicle stability in the process of switching a vehicle driving mode in the prior art. According to one embodiment of the invention, a method for adjusting vehicle speed adjusting power is provided, which comprises the steps of obtaining a vehicle model, a driving mode and a driving switching working condition of a vehicle, determining target front axle speed adjusting power of the vehicle in response to the vehicle model being a four-wheel drive vehicle model and the driving mode being a non-four-wheel drive mode, determining the adjusting speed of the front axle speed adjusting power of the vehicle based on the driving switching working condition, and adjusting the current front axle speed adjusting power of the vehicle to the target front axle speed adjusting power based on the adjusting speed. The method for adjusting the vehicle speed regulation power comprises the steps of obtaining battery discharging power, rear-axle external machine characteristic power, front-axle speed regulation required torque, acceleration correction power and a reserved coefficient of the vehicle, calculating first front-axle speed regulation power of the vehicle based on the battery discharging power and the rear-axle external machine characteristic power, calculating second front-axle speed regulation power of the vehicle based on the front-axle speed regulation required torque and the acceleration correction power, calculating third front-axle speed regulation power of the vehicle based on the battery discharging power and the reserved coefficient, and determining target front-axle speed regulation power based on the first front-axle speed regulation power, the second front-axle speed regulation power and the third front-axle speed regulation power. The method for adjusting the speed regulation power of the vehicle further comprises the steps of responding to the driving switching working condition to be in a four-drive mode to be switched to a two-drive mode, obtaining the power transfer distribution rate and the ascending adjustment rate of the vehicle, determining whether the driving switching working co