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CN-122009105-A - Control method, device, storage medium and program product for braking system

CN122009105ACN 122009105 ACN122009105 ACN 122009105ACN-122009105-A

Abstract

The embodiment of the invention discloses a control method, a control device, a storage medium and a program product of a brake system. The control method of the braking system comprises the steps of obtaining the clamping force output by the braking unit, determining the change rate of the clamping force in a preset time period according to the clamping force, and determining whether to execute the operation of outputting the clamping force again according to the relation between the change rate and a preset threshold value. According to the technical scheme, whether the operation of outputting the clamping force again is carried out or not is determined according to the relation between the change rate of the clamping force and the preset threshold value by acquiring the clamping force output by the braking unit and calculating the change rate of the clamping force in the preset time period, so that the operation of outputting the clamping force again is rapidly judged, the control efficiency is improved, the sliding risk of a vehicle caused by insufficient clamping force is reduced, and the safe parking is realized.

Inventors

  • LI MINQIANG
  • HUANG MEIPENG
  • PEI JIANLONG

Assignees

  • 耐世特汽车系统（苏州）有限公司

Dates

Publication Date
20260512
Application Date
20241111

Claims (10)

  1. 1. A control method of a brake system is characterized in that the brake system comprises a brake unit for outputting a clamping force, and the control method of the brake system comprises the following steps: Acquiring the clamping force output by the braking unit; determining the change rate of the clamping force in a preset time period according to the clamping force; and determining whether to execute the operation of outputting the clamping force again according to the relation between the change rate and a preset threshold value.
  2. 2. The control method of a brake system according to claim 1, wherein said determining a rate of change of said clamping force in a preset time period from said clamping force includes: calculating a difference value between the clamping force at the starting moment of the parking state and the clamping force after a preset time period; And calculating the change rate of the clamping force according to the ratio of the difference value to the preset time period.
  3. 3. The control method of a brake system according to claim 1, wherein the determining whether to perform the re-output clamping force operation according to the relationship between the rate of change and a preset threshold value includes: When the change rate of the clamping force is greater than or equal to the preset threshold value, determining that the operation of outputting the clamping force again needs to be executed; and controlling the braking unit to output the clamping force again.
  4. 4. A control method of a brake system according to claim 3, wherein said determining whether to perform the re-output clamping force operation according to the relationship between the rate of change and a preset threshold value further comprises: And when the change rate of the clamping force is smaller than the preset threshold value, determining that the operation of outputting the clamping force again is not needed to be executed.
  5. 5. A control method of a brake system according to claim 3, characterized by further comprising, after said controlling said brake unit to output a clamping force again: Calculating the change rate of the clamping force within a preset time period again; When the change rate of the clamping force is smaller than the preset threshold value, controlling the braking unit to stop working; and controlling the braking unit to output the clamping force again when the change rate of the clamping force is still greater than or equal to the preset threshold value.
  6. 6. The control method of a brake system according to claim 5, characterized by further comprising, after controlling the brake unit to output the clamping force again while the rate of change of the clamping force is still greater than or equal to the preset threshold value: and after the braking unit is controlled to output the clamping force for a preset number of times, when the change rate of the clamping force is still greater than or equal to the preset threshold value, controlling the braking unit to stop working.
  7. 7. The control method of a brake system according to claim 1, wherein the preset time period is less than or equal to a time for which the brake system delays power down.
  8. 8. A control device of a brake system, characterized by comprising: the clamping force acquisition module is used for acquiring the clamping force output by the braking unit; The change rate calculation module is used for determining the change rate of the clamping force in a preset time period according to the clamping force; And the judging module is used for determining whether to execute the operation of outputting the clamping force again according to the relation between the change rate and the preset threshold value.
  9. 9. A computer readable storage medium storing computer instructions for causing a processor to execute the method of controlling the brake system according to any one of claims 1-7.
  10. 10. A computer program product, characterized in that the computer program product comprises a computer program which, when executed by a processor, implements a method of controlling a brake system according to any one of claims 1-7.

Description

Control method, device, storage medium and program product for braking system Technical Field The present invention relates to the field of vehicle control technology, and in particular, to a control method, device, storage medium, and program product for a brake system. Background The application of automobiles in daily life of people is very common, and the safety problem of automobiles is also an important point of attention. When a driver drives an automobile to run, the driver needs to decelerate or stop the automobile according to road conditions or park the automobile on a road with gradient, and the driver needs to apply a braking system of the automobile to forcedly brake the automobile by applying a certain braking force to wheels of the automobile. The vehicle is generally provided with a mechanical hand brake or an electronic parking brake (Electronic Parking Brake, EPB) system, the EPB system can control a motor of a parking brake device arranged on the wheel through a built-in electronic control unit (Electronic Control Unit, ECU) to clamp and release wheels, and meanwhile, the vehicle can be provided with proper braking force according to different road conditions to realize electronic parking of the vehicle. After the vehicle carrying the EPB system is driven vigorously, the temperature of the brake disc is changed greatly, the temperature can reach 400 ℃, if the vehicle is parked at the moment, the clamping force is reduced when the vehicle is parked due to thermal expansion and cold contraction of the brake disc, the braking performance is affected, the parking braking force is insufficient, and the risk of sliding the vehicle when the vehicle is parked on a slope is caused. The prior art scheme is to judge whether the clamping force needs to be increased or not through temperature or heat calculation. However, the control efficiency is lower in the scheme in the prior art, the influence factors are more, the risk of sliding after the vehicle is parked possibly caused by inaccurate temperature estimation, and safe parking cannot be realized. Disclosure of Invention The invention provides a control method, a device, a storage medium and a program product of a braking system, which are used for determining whether to execute the operation of outputting the clamping force again according to the relation between the change rate of the clamping force and a preset threshold value, so as to quickly judge whether to execute the operation of outputting the clamping force again, improve the control efficiency, reduce the sliding risk of a vehicle caused by insufficient clamping force and realize safe parking. According to an aspect of the present invention, there is provided a control method of a brake system including a brake unit for outputting a clamping force, the control method of the brake system including: acquiring the clamping force output by a braking unit; Determining the change rate of the clamping force in a preset time period according to the clamping force; And determining whether to execute the operation of outputting the clamping force again according to the relation between the change rate and the preset threshold value. Optionally, determining the rate of change of the clamping force in the preset time period according to the clamping force includes: calculating a difference value between the clamping force at the starting moment of the parking state and the clamping force after a preset time period; and calculating the change rate of the clamping force according to the ratio of the difference value to the preset time period. Optionally, determining whether to execute the operation of outputting the clamping force again according to the relationship between the change rate and the preset threshold value includes: When the change rate of the clamping force is greater than or equal to a preset threshold value, determining that the operation of outputting the clamping force again needs to be executed; the control brake unit outputs the clamping force again. Optionally, determining whether to execute the operation of outputting the clamping force again according to the relationship between the change rate and the preset threshold value further includes: When the rate of change of the clamping force is less than a preset threshold, it is determined that the operation of outputting the clamping force again is not required to be performed. Optionally, after controlling the brake unit to output the clamping force again, the method further includes: Calculating the change rate of the clamping force in a preset time period again; when the change rate of the clamping force is smaller than a preset threshold value, controlling the braking unit to stop working; And when the change rate of the clamping force is still greater than or equal to the preset threshold value, controlling the braking unit to output the clamping force again. Optionally, after controlling the brake unit to output the cla