Measurement method

A possible measurement method is depicted in the picture. There, you see a real time particle size and mass concentration measurement setup in a brake test stand, using a High Resolution ELPI®+ and a Dekati® ejection Diluter (DI-1000).


As exhaust emissions from engine tailpipe have been decreasing in recent years through development of engines and exhaust after-treatment systems, non-exhaust emissions have become a major contributor to total particle emissions from vehicles. Non-exhaust emissions have been estimated to contribute to almost 50 % of total PM2.5 and PM10 emissions from vehicles and one of the main sources of non-exhaust emissions is particles emitted from brake-wear.

Since the particle emissions from the brake wear are formed through different mechanisms and contain particles of various sizes, an instrument with a very wide particle size range is needed to accurately characterize these emissions – as for instance, the Dekati ELPI®+ impactor.

Links & Publications

Data sheet ELPI®+Application brochure: Brake Wear Emission MeasurementsGuido Perricone et al.: A Test Stand Study on the Volatile Emissions of a Passenger Car Brake Assembly (2019)Vlastimil Matějka et al.: On the running-in of brake pads and discs for dyno bench tests (2017)Guido Perricone et al.: Towards the ranking of airborne particle emissions from car brakes – a system approach (2016)Piyush C. Verma et al.: Wear debris from brake system materials: A multi-analytical characterization approach (2016)Brake test stand for particles measurement and collection (lecture) (2016)

These instruments can be used for this application

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