Brake Particle Emission Influenced by Grooved Disc Friction Surfaces With Or Without A Hard Coating


To be published on 09/08/2024

Brake Colloquium & Exhibition - 42nd Annual
Authors Abstract
Many performance sport passenger vehicles use drilled or grooved cast iron brake rotors for a better braking performance or a cosmetic reason. Such brake rotors would unfortunately cause more brake dust emission, appearing with dirty wheel rims. To better understand effects of such brake rotors on particle emission, a pin-on-disc tribometer with two particle emission measurement devices was used to monitor and collect the emitted airborne particles. The first device was a fast mobility particle sizer, measuring particles ranging from 5.6 to 560 nm in 32 size channels. The second device was an electrical low pressure impactor to measure and collect particles from 6 nm to 10 μm at 14 size-resolved stages. The testing samples were scaled-down brake discs (100 mm in diameter) against low-metallic brake pads. Two machined surface conditions (plain and grooved) with uncoated or ceramic-coated friction surfaces were selected for the investigation. The results showed that the grooved friction surface led to a higher particle emission than a plain friction surface finish. The ceramic coating can reduce the negative effect of the grooving through reduction of the particle emission.
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Cai, R., Nie, X., Lyu, Y., and Wahlstrom, J., "Brake Particle Emission Influenced by Grooved Disc Friction Surfaces With Or Without A Hard Coating," SAE Technical Paper 2024-01-3030, 2024, .
Additional Details
To be published on Sep 8, 2024
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Technical Paper