Solution for fine dust particles from brakes?
Brake dust is an essential source of fine particulates from vehicles. Tallano, a French start-up, developed a sort of mini-vacuum cleaner called ‘Tamic’, mounted right nearby the brake calipers to catch the dust. These particles in the air are known to cause severe pulmonary complaints with people.
A study by the Royal British Academy of Chemistry provides arguments for Tallano. Brake pad abrasion accounts for up to 21% of particulate emissions (PM10) from road traffic.
Euro 7 emission standard
Brake dust is gradually becoming a significant cause of particulate matter in vehicles. This is not because we suddenly brake more, but because new internal combustion engines emit fewer particles thanks to the use of soot filters, meaning the share of the brake-dust is starting to dominate.
Europe is gradually becoming aware of this too because the new Euro 7 emission standard to be introduced from 2025 would also take brake dust into account. Until now, this is not measured and, therefore, there are no standards for it.
Heavily polluted air
Tallano wants to convince policymakers and public authorities that the issue of braking is a public health issue just as much as diesel. That goes for cars, but also for trams and trains, especially in the confined environment of an urban underground railway station. That’s why the company set up a project with the French railway company, SNCF.
“At the Auber RER station ( France), fine particle pollution levels of 250 micrograms per cubic meter of air at noon, and 500 micrograms at the end of the day are measured,” says Rocca-Serra, CEO at Tallano. “The regulations provide for a critical threshold of 50 micrograms,” he adds.
Tamic aspiration system
The Tamic system Tallano developed sucks up brake dust close to the brake disc and the brake pad. Since 2018, Tallano has been testing its technology on a Renault Zoe.
According to Tallano, the technology is capable of capturing 85% of the particles resulting from friction between the disc and the brake shoes at the source – and 90% in urban driving. As far as railways are concerned, the tests carried out over the last two years on a test bench by the SNCF at its Vitry-sur-Seine (Val-de-Marne) center have yielded slightly less spectacular results, but at least 50% of the particles emitted can be captured.
When it comes to reducing pollutants at the source of braking, Tallano has no real competitors. Tallano’s few – including German equipment manufacturer Bosch – have instead focused their work on the materials that are used for brake discs and pads. In the future, trains will also be able to brake largely electrically and thus regenerate the braking energy. This technology is already present in every electric car.