Tests to Evaluate B and G Brake Torque Tester

摘要

Traditionally, inspections of heavy vehicle brake systems were performed byvisual observation of the brakes. A number of devices have been developed to quickly evaluate the condition of the brakes without the need for the inspector to go under the vehicle. One such device is a tester which checks the status of a brake system by measuring the static breakaway torque of each wheel. This device uses a mechanism to grip the wheel and, with the brake applied, apply a torque to the tire, measuring the force necessary to turn the wheel. An evaluation of the device was conducted which compared the force measurements made using the breakaway torque device with forces measured on an in-ground roller dynamometer. This comparison showed that the forces measured with the torque tester agreed with the roller tester reasonably well, with the torque tester showing a somewhat higher level of run-to-run scatter.