CN-121994509-A - Method and device for testing vehicle brake and readable storage medium

CN121994509ACN 121994509 ACN121994509 ACN 121994509ACN-121994509-A

Abstract

The application discloses a method and a device for testing a vehicle brake and a readable storage medium, and relates to the technical field of new energy automobiles. The testing method of the vehicle brake comprises the steps of setting a vehicle provided with the brake to be tested on a rotary drum test bed, controlling the vehicle to brake in a braking energy recovery mode, obtaining a braking pressure value and a braking temperature value of the brake to be tested in a braking process, setting the brake to be tested on a rack, adjusting braking control parameters of the brake to be tested in the braking operation on the rack according to the braking pressure value and the braking temperature value, controlling the brake to be tested to simulate a braking scene of the vehicle in the braking energy recovery mode on the rack, performing braking operation based on the braking control parameters, collecting particles generated by the brake to be tested on the rack due to braking abrasion, determining a mass value of the particles, and determining the emission amount of the particles of the brake to be tested according to the mass value. The application provides accuracy in detecting a vehicle brake.

Inventors

SUN JIAXING
WANG LEI
LI QIAN
WANG YUWEI
WANG FENGBIN
LI JINGYUAN
LIU ZISHU
LIU LE
QIN HONGYU
ZHENG SIKAI
ZHANG XIAOWEN

Assignees

中汽研汽车检验中心（天津）有限公司

Dates

Publication Date: 20260508
Application Date: 20260304

Claims (10)

1. A method of testing a vehicle brake, the method comprising: Setting a vehicle with a brake to be tested on a rotary drum test bed, and controlling the vehicle to perform braking operation in a braking energy recovery mode to obtain a braking pressure value and a braking temperature value of the brake to be tested in a braking process; Setting a brake to be tested on a rack, and adjusting brake control parameters of braking operation of the brake to be tested on the rack according to the brake pressure value and the brake temperature value; Controlling a brake to be tested to simulate a braking scene of the vehicle in the braking energy recovery mode on a rack, and performing braking operation based on the braking control parameters; collecting particles generated by a brake to be tested on a rack due to braking abrasion, and determining the mass value of the particles; and determining the emission amount of the particulate matters of the brake to be tested according to the mass value.
2. The method of claim 1, wherein said adjusting brake control parameters of a brake operation of the brake under test on the gantry in accordance with the brake pressure value and the brake temperature value comprises: determining a braking torque value corresponding to the brake to be tested according to the braking pressure value; and adjusting the torque of the brake to be tested to the braking torque value, and adjusting the temperature of the brake to be tested to the braking temperature value.
3. The method of claim 2, wherein the brake to be tested comprises a brake disc, and wherein after adjusting the temperature of the brake to the brake temperature value, the method further comprises: Acquiring a preset test speed, the whole vehicle quality, a braking force distribution ratio and a wheel radius of the vehicle; determining the wheel rotation speed of the vehicle according to the preset test speed; Determining a test inertia value corresponding to the brake disc according to the whole vehicle mass, the braking force distribution ratio and the wheel radius; And adjusting the rotating speed of the brake disc to be the rotating speed of the wheel, and adjusting the inertia of the brake disc to be the test inertia value.
4. A method according to claim 3, wherein, in controlling the brake to be tested to simulate a braking scenario of the vehicle in the braking energy recovery mode on a bench, the method further comprises: Determining recovered energy of the brake; And adjusting the rotating speed of the brake disc according to the recovered energy.
5. The method according to claim 4, wherein the method further comprises: Acquiring a speed time curve; Determining a preset speed value of the brake disc according to the speed time curve; And adjusting the rotating speed of the brake disc to the preset speed value.
6. The method of claim 4, wherein the determining the recovered energy of the brake comprises: Acquiring an actual torque value and a theoretical required torque value of the brake in the braking process; Performing numerical correction processing on the theoretical required torque value according to the actual torque value to obtain an updated theoretical required torque value; And determining the recovered energy according to the updated theoretical required torque value.
7. The method according to any one of claims 1 to 6, wherein said determining the particulate matter emission of the brake to be tested from said mass value comprises: acquiring the driving mileage of the vehicle in the braking process; And determining the ratio of the mass value to the driving mileage to obtain the particulate matter emission.
8. A test device for a vehicle brake, the device comprising: Setting a vehicle with a brake to be tested on a rotary drum test bed, and controlling the vehicle to perform braking operation in a braking energy recovery mode to obtain a braking pressure value and a braking temperature value of the brake to be tested in a braking process; Setting a brake to be tested on a rack, and adjusting brake control parameters of braking operation of the brake to be tested on the rack according to the brake pressure value and the brake temperature value; Controlling a brake to be tested to simulate a braking scene of the vehicle in the braking energy recovery mode on a rack, and performing braking operation based on the braking control parameters; collecting particles generated by a brake to be tested on a rack due to braking abrasion, and determining the mass value of the particles; and determining the emission amount of the particulate matters of the brake to be tested according to the mass value.
9. A test device for a vehicle brake, comprising: A processor; A memory in which a program or instructions are stored, the processor, when executing the program or instructions in the memory, implementing the steps of the method for testing a vehicle brake as claimed in any one of claims 1 to 7.
10. A readable storage medium, characterized in that the readable storage medium has stored thereon a program or instructions which, when executed by a processor, implement the steps of the method for testing a vehicle brake as claimed in any one of claims 1 to 7.

Description

Method and device for testing vehicle brake and readable storage medium Technical Field The application relates to the technical field of new energy automobiles, in particular to a method and a device for testing a vehicle brake and a readable storage medium. Background The existing brake bench test device cannot reproduce a vehicle brake energy recovery control strategy, is suitable for purely mechanical friction to test the abrasion emission of a brake, and uses a motor to recover energy to brake in the actual braking process of a new energy vehicle, but the existing test method does not consider energy recovery, so that the test results of the abrasion emission of the brake of the new energy vehicle are higher. Therefore, the existing test method of the vehicle brake has the technical problems of low test accuracy and the like. Disclosure of Invention The embodiment of the application provides a method and a device for testing a vehicle brake and a readable storage medium, which are used for solving the technical problems of lower testing accuracy and the like in the prior art. In a first aspect of an embodiment of the present application, there is provided a method for testing a vehicle brake, the method including: the method comprises the steps of setting a vehicle with brakes to be tested on a rotary drum test bed, controlling the vehicle to brake in a braking energy recovery mode, and obtaining a braking pressure value and a braking temperature value of the brakes to be tested in a braking process; Setting a brake to be tested on a rack, and adjusting brake control parameters of braking operation of the brake to be tested on the rack according to a brake pressure value and a brake temperature value; controlling a brake to be tested to simulate a braking scene of the vehicle in a braking energy recovery mode on a rack, and performing braking operation based on braking control parameters; collecting particles generated by a brake to be tested on a rack due to braking abrasion, and determining the mass value of the particles; And determining the emission amount of the particulate matters of the brake to be tested according to the mass value. According to the method for testing the vehicle brake, after the brake to be tested is arranged on the rack, the brake to be tested is controlled to simulate a braking scene of the vehicle in a braking energy recovery mode on the rack, braking operation is carried out based on braking control parameters, particulate matters generated by the brake to be tested on the rack due to braking abrasion are collected, the mass value of the particulate matters is determined, the particulate matter emission of the brake is further determined, the data accuracy of the particulate matter emission is improved, and the testing accuracy of the brake is further improved. In a second aspect of the embodiment of the present application, there is provided a test device for a vehicle brake, the device including: The first control unit is used for setting a vehicle with the brake to be tested on the rotary drum test bed, controlling the vehicle to perform braking operation in a braking energy recovery mode, and obtaining a braking pressure value and a braking temperature value of the brake to be tested in a braking process; The second control unit is used for setting the brake to be tested on the rack and adjusting braking control parameters of braking operation of the brake to be tested on the rack according to the braking pressure value and the braking temperature value; The third control unit is used for controlling the brake to be tested to simulate a braking scene of the vehicle in a braking energy recovery mode on the rack and performing braking operation based on braking control parameters; The collecting unit is used for collecting particles generated by the brake to be tested on the rack due to brake abrasion and determining the mass value of the particles; And the processing unit is used for determining the emission amount of the particulate matters of the brake to be tested according to the mass value. According to the testing device for the vehicle brake, after the brake to be tested is arranged on the rack, the brake to be tested is controlled to simulate a braking scene of the vehicle in a braking energy recovery mode on the rack, braking operation is carried out based on braking control parameters, particulate matters generated by the brake to be tested on the rack due to braking abrasion are collected, the mass value of the particulate matters is determined, the particulate matter emission of the brake is further determined, the data accuracy of the particulate matter emission is improved, and the testing accuracy of the brake is further improved. In a third aspect of the embodiments of the present application, there is provided another apparatus for testing a vehicle brake, comprising a processor and a memory, the memory storing a computer program which, when executed by