Method for testing maximum adhesion coefficient of tire and road surface by taking whole automobile as test carrier

• Main Authors: ZHANG PENG, PENG GANG, ZHENG YANDAN, YE XIAOMING, HUANG YAODONG
• Format: Patent
• Language: Chinese; English
• Published: 03.07.2020
• Subjects: MEASURING; PHYSICS; TESTING; TESTING STATIC OR DYNAMIC BALANCE OF MACHINES ORSTRUCTURES; TESTING STRUCTURES OR APPARATUS NOT OTHERWISE PROVIDED FOR

The invention discloses a method for testing the maximum adhesion coefficient of a tire and a road surface by taking a whole automobile as a test carrier. The method comprises the steps that a test vehicle starts to brake at a certain initial speed v0, the brake pedal force is gradually increased in the brake process, and the vehicle brake strength is gradually increased to a peak value; a corresponding pipeline oil pressure value P1 when the brake intensity has a peak value a1 is found out by comparing the brake intensity recorded in the test process and the change trend of the pipeline oil pressure along with time; the pipeline oil pressure of the vehicle is subjected to output adjustment so as to enable the maximum value of the pipeline oil pressure to be P1; a time value of a specifiedvehicle speed interval is tested through emergency braking; the test vehicle starts emergency braking at a certain initial speed v0, and a time difference value t of the specified vehicle speed interval is tested; the brake