CN-121973783-A - Vehicle starting control method and device, vehicle and medium

CN121973783ACN 121973783 ACN121973783 ACN 121973783ACN-121973783-A

Abstract

The invention relates to the technical field of vehicle control and discloses a vehicle starting control method, a device, a vehicle and a medium, wherein the method comprises the steps of responding to starting operation of the vehicle in an automatic parking state, and adjusting a parking release control parameter according to current pavement information and vehicle parameters; and releasing the automatic parking state according to the adjusted parking release control parameter. According to the invention, the parking release control parameters are dynamically adjusted through a dynamic and self-adaptive parameter adjustment mechanism, namely according to real-time pavement information and vehicle parameters, the limitation of traditional fixed calibration is eliminated, different road conditions and vehicle states can be adapted, the vehicle starting quality in an automatic parking state is remarkably improved, and the fixed parameters in the automatic parking function can be continuously optimized, so that the individual manufacturing differences of different vehicles are adapted, starting anomalies such as sliding, dragging, shifting and the like of the vehicles can be effectively avoided, and the user driving experience and the vehicle intelligent control level are greatly improved while the safety and smoothness of vehicle starting are improved.

Inventors

ZHU XIAOLONG
CHEN JIANYING
ZHOU XINYA
Lan Shenhua

Assignees

重庆长安汽车股份有限公司

Dates

Publication Date: 20260505
Application Date: 20260320

Claims (12)

1. A vehicle start control method, characterized by comprising: responding to starting operation of the vehicle in an automatic parking state, and adjusting a parking release control parameter according to current road surface information and vehicle parameters; releasing the automatic parking state according to the adjusted parking release control parameter; The road surface information comprises a longitudinal gradient angle, the vehicle parameters comprise transmission shaft torque and braking pressure, and the parking release control parameters comprise a pressure release coefficient; The parking release control parameter is adjusted according to the current road surface information and the vehicle parameter, and the method comprises any one of the following steps: Increasing the pressure relief coefficient in response to the longitudinal grade angle being greater than zero and the drive shaft torque being less than a critical rolling torque threshold, the critical rolling torque threshold being proportional to an absolute value of the longitudinal grade angle; reducing the pressure relief coefficient in response to the longitudinal grade angle being greater than zero and the brake pressure being greater than a hold-up brake pressure threshold, the hold-up brake pressure threshold being proportional to an absolute value of the longitudinal grade angle; And increasing the pressure relief coefficient in response to the longitudinal gradient angle being less than zero and the estimated net acceleration force being greater than an acceleration force threshold, the estimated net acceleration force being determined from a weighted sum of an absolute value of the longitudinal gradient angle, vehicle gravity, and throttle opening and closing.
2. The vehicle start control method according to claim 1, characterized in that the releasing the automatic parking state according to the adjusted parking release control parameter includes: and releasing the automatic parking state by using the adjusted parking release control parameter.
3. The vehicle launch control method of claim 1 wherein the vehicle parameters further include a model of the vehicle, a current load, and wherein the increasing the pressure relief coefficient comprises: and determining an increase coefficient of the pressure relief coefficient according to the vehicle type and the current load, and amplifying the pressure relief coefficient according to the increase coefficient, wherein the increase coefficient is inversely proportional to the current load.
4. A vehicle launch control method according to claim 3 wherein said reducing said pressure relief coefficient comprises: and determining a reduction coefficient of the pressure relief coefficient according to the vehicle type and the current load, and reducing the pressure relief coefficient according to the reduction coefficient, wherein the reduction coefficient is in direct proportion to the current load.
5. The vehicle launch control method of claim 1, wherein the adjusting the parking release control parameter further comprises: And adjusting the pressure relief coefficient by adopting an operation rule so as to keep the adjusted pressure relief coefficient within a preset interval threshold range, wherein the operation rule comprises at least one of addition and subtraction operation, mapping operation based on a simulation curve, exponential operation and logarithmic operation.
6. The vehicle launch control method according to any one of claims 1 to 5, further comprising storing a record of the current adjustment to a launch parameter learning library, periodically calling a record sample in the launch parameter learning library to train an AI decision model, and outputting a release control reference parameter using the AI decision model based on the road surface information and the vehicle parameters acquired per launch.
7. The vehicle start control method according to claim 6, characterized in that the releasing the automatic parking state according to the adjusted parking release control parameter further includes: And if the difference between the adjusted parking release control parameter and the release control reference parameter is smaller than an error threshold value, releasing the automatic parking state by using the release control reference parameter, and accumulating an AI forward result once.
8. The vehicle launch control method of claim 7, wherein the method further comprises: And if the difference between the adjusted parking release control parameter and the release control reference parameter is larger than an error threshold value and the AI positive result ratio is not smaller than a safety ratio value, releasing the automatic parking state by using the release control reference parameter, and accumulating an AI negative result once.
9. The vehicle launch control method of claim 7, wherein the method further comprises: And if the difference between the adjusted parking release control parameter and the release control reference parameter is larger than an error threshold value and the AI positive result ratio is smaller than a safety ratio value, releasing the automatic parking state by using the adjusted parking release control parameter, and accumulating one AI negative result.
10. A vehicle start control device, characterized by comprising: the adjusting module is used for responding to starting operation of the vehicle in an automatic parking state and adjusting the parking release control parameters according to the current road surface information and the vehicle parameters; the control module is used for releasing the automatic parking state according to the adjusted parking release control parameter; The road surface information comprises a longitudinal gradient angle, the vehicle parameters comprise transmission shaft torque and braking pressure, and the parking release control parameters comprise a pressure release coefficient; The parking release control parameter is adjusted according to the current road surface information and the vehicle parameter, and the method comprises any one of the following steps: Increasing the pressure relief coefficient in response to the longitudinal grade angle being greater than zero and the drive shaft torque being less than a critical rolling torque threshold, the critical rolling torque threshold being proportional to an absolute value of the longitudinal grade angle; reducing the pressure relief coefficient in response to the longitudinal grade angle being greater than zero and the brake pressure being greater than a hold-up brake pressure threshold, the hold-up brake pressure threshold being proportional to an absolute value of the longitudinal grade angle; And increasing the pressure relief coefficient in response to the longitudinal gradient angle being less than zero and the estimated net acceleration force being greater than an acceleration force threshold, the estimated net acceleration force being determined from a weighted sum of an absolute value of the longitudinal gradient angle, vehicle gravity, and throttle opening and closing.
11. A vehicle comprising a controller, the controller comprising a memory and a processor, the memory and the processor being communicatively coupled to each other, the memory having stored therein computer instructions, the processor executing the computer instructions to perform the vehicle launch control method of any one of claims 1 to 9.
12. A computer-readable storage medium having stored thereon computer instructions for causing a computer to execute the vehicle start control method according to any one of claims 1 to 9.

Description

Vehicle starting control method and device, vehicle and medium Technical Field The invention relates to the technical field of vehicle control, in particular to a vehicle starting control method, a vehicle starting control device, a vehicle and a medium. Background An automatic parking (Auto Hold) function is a core convenience configuration of modern vehicles, and has been widely used in various vehicle types. This function can automatically maintain the brake pressure after the driver releases the brake pedal while the vehicle is temporarily stopped, such as waiting for a traffic signal, so that the vehicle is kept stationary, thereby reducing the operational burden of the driver. When the driver needs to restart, the system can automatically release the parking brake after the driving torque reaches a certain condition only by pressing the accelerator pedal, so that the stable starting of the vehicle is realized. At present, the performance experience of automatic parking is mainly subjective feeling when a vehicle starts, and is mainly expressed as subjective smoothness in the process of releasing an automatic parking function when the vehicle starts, and the performance of the function is particularly critical under the working condition of a ramp. Aiming at the road condition of the ramp, the release condition of the function is that the power torque reaches a calibration value, and the starting smoothness can be directly influenced by the calibration value. Specifically, the current automatic parking control strategy generally depends on a set of pre-calibrated fixed parameters, such as a theoretical starting torque threshold value related to gradient and a pressure release coefficient, and the release condition is that the actual driving torque reaches the product value of the theoretical starting torque threshold value and the pressure release coefficient, and the set of parameters are calibrated and cured through limited sample vehicle tests in the vehicle research and development stage, so as to balance the anti-slip performance and starting responsiveness in the hill starting process. However, because of unavoidable consistency differences of vehicles in the production and manufacturing processes, such as microscopic differences of friction coefficient of a brake system, mass of the whole vehicle, output characteristics of a power system and the like, the control mode based on fixed calibration parameters is difficult to adapt to actual states of all vehicles. For example, in actual use, a fixed calibration parameter is adopted, so that the pressure release coefficient of a part of vehicles may be smaller, the release of an automatic parking function is premature, the driving torque is insufficient to overcome the resistance of a ramp, the phenomenon of 'sliding slope' of the vehicles is easy to cause, and potential safety hazards exist, and the fixed pressure release coefficient of another part of vehicles may be larger, so that the release of the automatic parking function is too late or the release process is hard, and obvious frustration or delay feeling, namely 'dragging' phenomenon, appears in the starting moment of the vehicles, so that the smoothness, comfort and safety of driving are seriously affected. In addition, there are some control schemes in the prior art for optimizing the starting process, such as adjusting the braking execution process through real-time feedback, or applying additional power compensation after detecting an abnormality, but most of these approaches focus on fine tuning the execution link under a given control command, or taking remedial measures after the occurrence of a problem, and fail to fundamentally dynamically and adaptively correct and learn the core control parameters themselves for determining the automatic parking release timing. In summary, there is a need to design a device capable of sensing the characteristics and real-time state of a vehicle, and continuously optimizing the fixed calibration parameters under the automatic parking function of the vehicle according to the characteristics and real-time state, so as to actively adapt to individual manufacturing differences of different vehicles, further eliminate abnormal phenomena such as sliding, dragging, and vehicle channeling, etc. occurring when the vehicle starts, and improve the driving experience of users and the intelligent control level of the vehicle. Disclosure of Invention The invention provides a vehicle starting control method, a vehicle starting control device, a vehicle and a medium, which are used for solving the problems that the prior art provided in the technical background is difficult to overcome the problem that the abnormal situation of vehicle starting is frequently caused easily due to the fact that fixed calibration parameters are not matched due to the difference of vehicle manufacturing consistency, and further starting smoothness and user driving experience are serio