CN-121989882-A - Vehicle comfort brake control method and device

CN121989882ACN 121989882 ACN121989882 ACN 121989882ACN-121989882-A

Abstract

The invention provides a vehicle comfortable braking control method and device, which relate to the technical field of vehicle comfortable braking control and comprise the steps of initializing a comfortable braking function to be in a standby state after the whole vehicle is electrified, collecting environment sensing data transmitted by an intelligent driving camera and a radar in real time, and dynamically determining braking activation adjustment time and adjustment level; the pressure release slope threshold value is calculated through road surface adhesion and vehicle speed, the braking grade is dynamically adjusted in combination with road condition risks, braking parameters are calculated by means of multipath sensing signals, braking pressure control quantity is generated to drive the integrated braking controller to act, the pressure release rate of the pressure build cavity is accurately regulated, and the vehicle automatically resumes a standby state after being stationary. The invention abandons a fixed braking parameter mode, combines the front road condition, the road surface condition and the driving state to realize self-adaptive braking control, effectively slows down parking pitching, combines braking safety and driving comfort, and adapts to various driving working conditions.

Inventors

GONG PENGZHENG
LIU HUIJIAN
FAN YIHONG

Assignees

奇瑞汽车股份有限公司

Dates

Publication Date: 20260508
Application Date: 20260407

Claims (10)

1. A vehicle comfort brake control method, characterized by comprising: initializing a comfortable braking function to be in a standby state under the condition of power-on of the whole vehicle, and acquiring environment sensing data in front of the current vehicle in real time; Based on the environment sensing data, dynamically determining the adjusting time and the adjusting level of the comfortable braking function from the standby state to the active state; And controlling the current vehicle to execute comfortable braking action according to the adjusting time and the adjusting grade.
2. The vehicle comfort brake control method according to claim 1, characterized in that the step of dynamically determining the adjustment timing and adjustment level of the comfort brake function from the standby state to the active state based on the environment-aware data, comprises: Determining the adjusting time for the comfortable braking function to be switched from the standby state to the activated state based on the relative running data of the current vehicle and the obstacle target in the environment sensing data, wherein the environment sensing data is used for representing the running working condition of the current vehicle; And determining the adjustment level of the comfortable braking function from the standby state to the activated state based on the driving influence data of the driving road surface in the environment sensing data.
3. The method according to claim 2, characterized in that the step of determining the adjustment timing at which the comfortable braking function is changed from the standby state to the activated state based on the relative running data of the current vehicle and the obstacle target in the environment-aware data, includes: triggering the comfort braking function to transition from the standby state to an active state when any of the following conditions is satisfied: predicting that the current vehicle enters a parking working condition within a preset period, wherein the current vehicle speed is greater than a preset speed threshold; detecting that a first preset distance in front of the current vehicle has a red light or a stop line, and simultaneously, the current vehicle is in a vehicle following working condition, and the relative distance between the current vehicle and a to-be-followed object is within a preset distance threshold range; It is detected that a second preset distance in front of the current vehicle has a pedestrian crossing and a waiting pedestrian is present, and an absolute value of a longitudinal acceleration of the current vehicle is greater than a first preset acceleration threshold.
4. A vehicle comfort brake control method according to claim 3, wherein the step of predicting that the current vehicle will enter a parking condition within a preset period of time, comprises: And if the actual total time length from the current time of uniformly decelerating and braking to complete standstill according to the maximum safe deceleration allowed by the estimated value of the road surface adhesion coefficient of the driving road surface is smaller than a preset time period, judging that the current vehicle enters a parking working condition in the preset time period.
5. The vehicle comfort brake control method according to claim 2, characterized in that the step of determining the adjustment level of the comfort brake function from the standby state to the activated state based on the running influence data of the running surface in the environment-aware data includes: Determining an initial adjustment level based on the driving impact data of the driving road surface, so that the pressure release slope of the preset pressure build cavity corresponding to the initial adjustment level does not exceed a maximum allowable pressure release slope threshold; and if the environment-aware data meets the preset condition, performing a degradation operation on the initial adjustment level once, wherein the adjustment level after degradation is not lower than one level.
6. The vehicle comfort brake control method according to claim 5, characterized in that the step of determining the maximum allowable pressure release slope threshold value based on the estimated road surface adhesion coefficient value of the running road surface of the current vehicle and the vehicle speed of the current vehicle includes: a three-dimensional calibration mapping table of road surface adhesion coefficient, vehicle speed and maximum allowable decompression slope threshold is established in advance through bench calibration and real lane road test; And acquiring the estimated value of the road surface adhesion coefficient of the driving road surface and the current vehicle speed in real time, and carrying out table lookup and linear interpolation calculation based on the three-dimensional calibration mapping table to obtain the maximum allowable decompression slope threshold under the current working condition.
7. The vehicle comfort brake control method according to claim 1, characterized in that the step of controlling the current vehicle to perform a comfort brake action according to the adjustment timing and the adjustment level includes: triggering and collecting a vehicle running state signal based on the adjusting time, performing real-time resolving processing, and outputting and obtaining a vehicle longitudinal deceleration requirement matched with the current running working condition and a suspension dynamic response matching parameter; Combining the pressure release slope of the preset pressure build cavity corresponding to the adjustment level with the longitudinal deceleration requirement of the vehicle and the dynamic response matching parameters of the suspension to generate a braking pressure control quantity, and performing comfortable braking; and when the current vehicle is in a static state, stopping the comfortable braking action and recovering the comfortable braking function to the standby state.
8. A vehicle comfort brake control device characterized by comprising: the acquisition module initializes the comfortable braking function to a standby state under the condition of power-on of the whole vehicle and acquires environment sensing data in front of the current vehicle in real time; the determining module is used for dynamically determining the adjusting time and the adjusting grade of the comfortable braking function from the standby state to the active state based on the environment sensing data; And the control module is used for controlling the current vehicle to execute comfortable braking action according to the adjusting time and the adjusting grade.
9. An electronic device comprising a memory, a processor and a program stored on the memory and capable of running on the processor, the processor implementing the method of any one of claims 1 to 7 when executing the program.
10. A computer readable storage medium, characterized in that the computer program is stored in the readable storage medium, which computer program, when executed, implements the method of any of claims 1-7.

Description

Vehicle comfort brake control method and device Technical Field The invention relates to the technical field of vehicle comfortable braking control, in particular to a vehicle comfortable braking control method and device. Background With the rapid development of new energy automobile technology, integrated brake controllers are widely used in plug-in hybrid electric vehicles (PHEVs), hybrid Electric Vehicles (HEVs), range-extended electric vehicles (REEVs), pure electric vehicles (BEVs), and conventional internal combustion engine vehicles (ICEs). The market allocation rate of integrated brake controllers continues to increase, driven by both cost reduction and functional allocation boost. As a special function of the decoupling braking system, the comfortable braking technology obtains wide acceptance of users due to the effect of remarkably relieving the brake nodding phenomenon, and the configuration rate also shows a steady rising trend. Currently, mainstream comfortable braking systems in the market generally adopt three-level adjustable mode designs to meet the personalized requirements of different users. The technology realizes comfortable braking effect, and meanwhile, due to the inherent characteristic of the pressure relief process, certain influence can be generated on the parking distance, so that deviation exists between the actual parking position and the expected position of a driver. The user therefore needs to undergo an adaptation process at the first or earlier use, and the relevant instructions need to be specified in the vehicle instruction manual. In the prior art, the soft switch is mainly used for activating the comfortable braking function in advance and selecting a specific mode, and in the subsequent driving process, the integrated braking controller calls parameters of the corresponding mode to control the parking process. Although the driver can switch different parameter modes, the driver must reselect through a soft switch, and the operation flow is complicated. Furthermore, the system will continue to use the mode permanently after the parameters are selected, lacking dynamic adaptability, and having to intervene manually when the driver needs to adjust the mode. This mode of operation is significantly different from the current demand for intelligent development in the automotive industry. Disclosure of Invention The invention aims to provide a vehicle comfortable braking control method and device, which are used for relieving the technical problems that the switching of a comfortable braking function mode is complicated, the application scene cannot be self-adapted, the parking pitching is obvious, the driving comfort is poor, and the braking safety of low-attaching/bad road conditions is insufficient. In a first aspect, the present invention provides a vehicle comfort brake control method, comprising: initializing a comfortable braking function to be in a standby state under the condition of power-on of the whole vehicle, and acquiring environment sensing data in front of the current vehicle in real time; Based on the environment sensing data, dynamically determining the adjusting time and the adjusting level of the comfortable braking function from the standby state to the active state; And controlling the current vehicle to execute comfortable braking action according to the adjusting time and the adjusting grade. In an alternative embodiment, the step of dynamically determining the adjustment timing and adjustment level of the comfort brake function from the standby state to the active state based on the context awareness data includes: Determining the adjusting time for the comfortable braking function to be switched from the standby state to the activated state based on the relative running data of the current vehicle and the obstacle target in the environment sensing data, wherein the environment sensing data is used for representing the running working condition of the current vehicle; And determining the adjustment level of the comfortable braking function from the standby state to the activated state based on the driving influence data of the driving road surface in the environment sensing data. In an alternative embodiment, the step of determining the adjustment timing for the comfortable braking function to change from the standby state to the active state based on the relative running data of the current vehicle and the obstacle target in the environment sensing data includes: triggering the comfort braking function to transition from the standby state to an active state when any of the following conditions is satisfied: predicting that the current vehicle enters a parking working condition within a preset period, wherein the current vehicle speed is greater than a preset speed threshold; detecting that a first preset distance in front of the current vehicle has a red light or a stop line, and simultaneously, the current vehicle is in a vehicle following work