The New Inertia Dynamometer for Friction and Wear Testing of Brake Pads and Brake Discs

Abstract

For the sake of driving safety, the right choice of the brake pad friction material and its manufacturing processes to obtain the appropriate tribological properties is a matter of priority for brake pad manufacturers. Determination of the tribological properties is best done in component tests, i.e. in the setup: brake pads – brake disc. At the request of one of the domestic brake pad manufacturers, as part of the POIR project, an inertia dynamometer for testing friction and wear of brake pads and brake discs was developed and manufactured, which was given the symbol T-33. A test methodology was developed based on the “Cold application section” procedure described in SAE J2522:2003. The T-33 inertia dynamometer is designed for testing brake pads and brake discs intended for five vehicles representing the passenger vehicle class and vans. The paper presents the new test stand, test methodology, and results of verification tests of the T-33 dynamometer (interlaboratory comparison tests) performed on the Cinquecento vehicle brake setup.

Study of friction, wear and plastic deformation of automotive brake disc subjected to thermo-mechanical fatigue

“…The dynamometer test bench consists of drive train parts with a motor, interchangeable flywheels, brake disc mounting fixtures, load bearing arm, load cells, etc. Application software enables the user to configure operating parameters (speed, operating temperature, braking pressure, etc.,) and control test sequences as per input schedules [11][12][13]. Brake cylinders will create braking force and the system acquires & records data like speed, torque, temperature, stopping distance, etc., for analysis.…”