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Technique for Reducing Drag Torque of Brakes in the Non- Braking Mode
Published October 20, 1998 by Society of Automotive Engineers of Japan in Japan
Event: JSAE Autumn Conference
Brake drag torque under a non-braking condition with the disc rotating freely causes fuel economy to decline and induces disc thickness variation which gives rise to brake judder. In this study, how the contact condition of the pad and the disc rotor affects the disc wear was revealed first. Second, the relationship between the behavior of each part and the drag torque was analyzed by measuring the displacement at several places on the brake caliper together with the drag torque under non-braking mode. Based on the results, a design concept for reducing brake drag torque is presented here along with a concrete mechanism for obtaining the desired reduction.